CN117962749A - Visual field assisting device and working machine - Google Patents

Abstract

The invention relates to the field of engineering machinery, and provides a visual field auxiliary device and a working machine. When the swing arm is in the first position, the auxiliary observation mirror is positioned at the front end of the cab and exceeds the width range of the working machine. When the swing arm is in the second position, the auxiliary observation mirror is positioned at the rear end of the cab. In this way, when loading is performed, the auxiliary observation mirror can be switched to the front end of the cab, and the auxiliary observation mirror is out of the vehicle width line, so that the operator can observe the positions of the front wheels and the loading bucket, and a good front loading view is obtained. When the excavation work is performed, the auxiliary observation mirror can be switched to the rear end of the cab, so that an operator can observe the condition of the back side, and a good field of view after excavation can be obtained. And then can satisfy the user demand of preceding/rear end, cover traditional visual field blind area, realize more comprehensive visual field scope, reduce operating personnel's intensity of labour, improve the operating efficiency, promote equipment security.

Description

Visual field assisting device and working machine

Technical Field

The present invention relates to the field of engineering machinery, and more particularly, to a visual field assisting apparatus and a working machine.

Background

The engineering machinery such as the backhoe loader has good visual field in the running and working process, and has extremely important significance for the driver to sense the surrounding environment, cope with emergency, keep attention, improve driving comfort and the like.

The backhoe loader is commonly called as a double-head busy machine, and is an engineering machine with backhoe and loader functions. As shown in fig. 1, the front end, i.e., the loading end 1, can perform loading work, and the rear end, i.e., the excavating end 2, can perform excavating work. An operator can realize the direction switching of the front end and the rear end by rotating the seat by 180 degrees so as to complete corresponding work tasks. Currently, backview mirrors 4 are generally erected on both sides of the front end of a cab 3 of an excavating loader to assist in driving, so as to facilitate observation of the rear and the remaining contours of the vehicle.

However, the applicant has found that the existing backhoe loader suffers from at least the following problems:

As shown in fig. 2, since the engine compartment is provided at the front end thereof, the operator is affected to some extent by observing the positions of the loader bucket and the front wheels during the loading operation, and a first visual field blind area 51 is formed. While the excavation work is being performed, as shown in fig. 3, since the operator faces the rear end, a second blind field of view 52 is formed on the rear side thereof. Therefore, the distance and the position of the operator are not easy to judge, the operator needs to move the body and even stand to observe the surrounding conditions, the labor intensity of the operator is increased, and the working efficiency and the equipment safety are reduced.

Disclosure of Invention

The invention aims to provide a visual field auxiliary device and an operation machine, which are used for solving the problems that in the prior art, a visual field blind area exists in the running and operation processes of an excavating loader, the judgment of the distance and the position by an operator is not facilitated, the labor intensity of the operator is increased, and the working efficiency and the equipment safety are reduced.

In order to achieve the above object, the present invention provides a visual field assistance apparatus applied to a work machine, including:

a mounting base provided on a cab of the work machine;

The swing arm is rotatably arranged on the mounting base and can be switched between a first position and a second position;

the auxiliary observation mirror is arranged on the swing arm, when the swing arm is positioned at the first position, the auxiliary observation mirror is positioned at the front end of the cab, and the position of the auxiliary observation mirror exceeds the width range of the working machine; when the swing arm is at the second position, the auxiliary observation mirror is positioned at the rear end of the cab;

and the driving mechanism is used for driving the swing arm to rotate.

According to the present invention, there is provided a visual field assisting apparatus, the driving mechanism including:

one end of the movable arm is hinged with the swing arm, and the movable arm is used for driving the swing arm to rotate;

The connecting piece is hinged with the other end of the movable arm;

The telescopic driving piece is used for moving the connecting piece so as to drive the movable arm to swing.

According to the vision assistance device provided by the present invention, the driving mechanism further includes:

the number of the swing arms is two, the two swing arms are respectively arranged on two sides of the cab, the swing arms and the auxiliary observation mirrors are respectively arranged in one-to-one correspondence with the swing arms, and the two swing arms are hinged to two ends of the connecting piece.

The vision auxiliary device provided by the invention further comprises:

one end of the connecting rod is connected to the swing arm in a sliding way, and the connecting rod slides along the length direction of the swing arm;

the angle adjusting frame, its one end with auxiliary observation mirror is connected, the other end with the other end of connecting rod is articulated mutually, just auxiliary observation mirror with the swing arm rotates to be connected, the angle adjusting frame is used for driving under the drive of connecting rod auxiliary observation mirror rotates.

The vision auxiliary device provided by the invention further comprises:

The first hinge piece is sequentially arranged on the mounting base in a penetrating mode, the connecting rod is arranged on the mounting base in a penetrating mode, the swinging arm is arranged on the mounting base in a penetrating mode, the connecting rod is arranged on the swinging arm in a penetrating mode, the sliding groove is correspondingly arranged on the mounting base in a penetrating mode, the sliding groove is matched with the first hinge piece, and the first hinge piece is arranged in the sliding groove in a sliding mode.

The vision auxiliary device provided by the invention further comprises:

The second hinge part is rotationally connected with the swing arm, and one end of the second hinge part is connected with the angle adjusting frame;

the switching frame comprises a first connecting part and a second connecting part which are connected, wherein the first connecting part is connected with the other end of the second hinging piece, the second connecting part is rotationally connected with the auxiliary observation mirror, and the rotation axis of the second hinging piece is vertical to the rotation axis of the auxiliary observation mirror.

According to the vision auxiliary device provided by the invention, the sliding groove on the mounting base is provided with an arc-shaped groove, and/or the sliding groove on the swing arm is provided with a strip-shaped groove.

The vision auxiliary device provided by the invention further comprises:

The third hinge piece is arranged on the mounting base, and the swing arm is rotationally connected with the third hinge piece;

and the lifting lug is arranged on the third hinge piece.

According to the vision assistance device provided by the invention, the mounting base comprises:

the third hinge parts sequentially penetrate through the pair of mounting plates, and the swing arms are rotatably arranged between the pair of mounting plates.

The invention also provides a work machine comprising a field of view assistance device as defined in any one of the preceding claims.

The present invention provides a visual field assisting device, comprising: a mounting base provided in a cab of the work machine; the swing arm is rotatably arranged on the mounting base and can be switched between a first position and a second position; the auxiliary observation mirror is arranged on the swing arm, when the swing arm is positioned at the first position, the auxiliary observation mirror is positioned at the front end of the cab, and the position of the auxiliary observation mirror exceeds the width range of the working machine; when the swing arm is at the second position, the auxiliary observation mirror is positioned at the rear end of the cab; and the driving mechanism is used for driving the swing arm to rotate. In this way, the visual field auxiliary device can be added on the working machine such as the backhoe loader, when loading operation is carried out, the auxiliary observation mirror can be switched to the front end of the cab, and the auxiliary observation mirror is out of the vehicle width line, so that an operator can observe the positions of the front wheels and the loading bucket, and a good front loading visual field is obtained. When the excavation work is performed, the auxiliary observation mirror can be switched to the rear end of the cab, so that an operator can observe the condition of the back side, and a good field of view after excavation can be obtained. And then can satisfy the user demand of preceding/rear end, cover traditional visual field blind area, realize more comprehensive visual field scope, guarantee that operating personnel accurately perceives surrounding environment to in time deal with emergency etc. and reduce operating personnel's intensity of labour, improve the operating efficiency, the security of promotion equipment and driver's travelling comfort.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a prior art backhoe loader;

FIG. 2 is a schematic view of a prior art backhoe loader during a loading operation;

FIG. 3 is a schematic view of a prior art backhoe loader during a digging operation;

FIG. 4 is a schematic view of the installation of the vision assistance device provided by the present invention in a first position;

FIG. 5 is a schematic view of the installation of the vision assistance device provided by the present invention in a second position;

FIG. 6 is a top view of a vision assistance device provided by the present invention;

FIG. 7 is a partial schematic view of a vision assistance device provided by the present invention in a first position;

FIG. 8 is a partial schematic view of the vision assistance device provided by the present invention in a second position;

FIG. 9 is an exploded view of a vision assistance device provided by the present invention;

FIG. 10 is a schematic view of the position of an auxiliary viewer provided by the present invention;

FIG. 11 is a partial schematic view of an auxiliary viewer provided by the present invention;

Reference numerals:

1: a loading end; 2: an excavating end; 3: a cab; 4: a rearview observation mirror; 51: a first field of view blind zone; 52: a second field of view blind zone; 6: a mounting base; 61: an arc-shaped groove; 62: a mounting plate; 7: swing arms; 71: a rectangular groove; 8: an auxiliary observation mirror; 9: a movable arm; 10: a telescopic driving member; 11: a connecting piece; 12: a connecting rod; 121: connecting sleeves; 13: an angle adjusting frame; 14: a first hinge; 15: a sliding sleeve; 16: a second hinge; 17: a transfer frame; 171: a first connection portion; 172: a second connecting portion; 18: a third hinge; 19: lifting lugs; 20: a wear-resistant sleeve; 21: a first indirect field of view; 22: a second indirect field of view; 23: a vehicle width line; 24: cab wide line; 25: a fourth hinge; 26: and a fifth hinge.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. 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.

The view assisting device of the present invention is described below with reference to fig. 4 to 11.

As shown in fig. 4 to 11, an embodiment of the present invention provides a vision assistance device applied to a work machine, specifically, for example, an excavating loader, including a mounting base 6, a swing arm 7, an auxiliary scope 8, and a driving mechanism. Specifically, as shown in fig. 7, the mounting base 6 is provided in the cab 3 of the work machine. For example, the mounting base 6 is disposed on the top of the cab 3, so that a sufficient design space and a proper mounting position can be obtained, and thus the front-rear switching requirement and the design size requirement of the whole device can be satisfied. It should be noted that, in the placement position of the vision auxiliary device shown in fig. 7, the upper part is the top.

The auxiliary observation mirror 8 is arranged on the swing arm 7, and the auxiliary observation mirror 8 is a spherical mirror generally so as to obtain a larger visual field range. The swing arm 7 is rotatably provided on the mounting base 6, and the swing arm 7 is switchable between a first position and a second position. The driving mechanism is used for driving the swing arm 7 to rotate so as to realize the switching of the swing arm 7 between the first position and the second position. As shown in fig. 6, when the swing arm 7 is in the first position, the auxiliary scope 8 is located at the front end of the cab 3, and the auxiliary scope 8 is located beyond the width of the work machine. Generally, a rear view mirror 4 is installed on the armrest on both sides of the front end of the cab 3, and is located in a region between the cab wide line 24 and the vehicle width line 23 to observe the rear vehicle and assist the traveling. The rear view mirror 4 can only obtain a limited field of view of the width of the cab 3. The auxiliary observation mirror 8 is located outside the vehicle width line 23, so that as shown in fig. 4, an operator can observe the positions of the front wheel and the loading bucket, namely, the first indirect vision area 21 can be acquired by means of the auxiliary observation mirror 8, so that the vision blind area in the traditional loading operation is eliminated, the operator can conveniently see the positions of the two sides and the bottom edge of the front loading bucket clearly, avoid obstacles, and simultaneously, the movement track of the front wheel can be observed, and the movement of equipment is accurately controlled.

As shown in fig. 6, when the swing arm 7 is in the second position (indicated by a broken line in the drawing), the auxiliary observation mirror 8 is located at the rear end of the cab 3. Thus, as shown in fig. 5, the operator can observe the environment on the back side of the excavator, that is, the second indirect visual field area 22 can be obtained by means of the auxiliary observation mirror 8, so that the visual field blind area in the conventional excavating operation is covered, and the requirements of the operator for sensing the environment and coping with emergency are met. In a limited-width scene, the auxiliary viewer 8 may be switched to the rear end of the cab 3, and positioned in the vehicle width line 23. It should be noted that, regarding the placement position of the visual field assisting device shown in fig. 6, the direction indicated by the solid arrow in the drawing is the indicated width direction, the direction indicated by the hollow arrow in the drawing is the indicated front-back direction, the left end in the drawing is the indicated front end, and the right end in the drawing is the indicated rear end.

In this way, the visual field assisting device can be added to the working machine such as the backhoe loader, and when the loading operation is performed, the auxiliary observation mirror 8 can be switched to the front end of the cab 3, and the auxiliary observation mirror 8 is out of the vehicle width line 23, so that the operator can observe the positions of the front wheels and the loading bucket, and a good front loading visual field can be obtained. When the excavation work is performed, the auxiliary observation mirror 8 can be switched to the rear end of the cab 3, so that the operator can observe the back side, and a good field of view after excavation can be obtained. And then can satisfy the user demand of preceding/rear end, cover traditional visual field blind area, realize more comprehensive visual field scope, guarantee that operating personnel accurately perceives surrounding environment to in time deal with emergency etc. and reduce operating personnel's intensity of labour, improve the operating efficiency, the security of promotion equipment and driver's travelling comfort.

In the embodiment of the present invention, the driving mechanism includes a boom 9, a link 11, and a telescopic driving member 10. As shown in fig. 9, one end of the movable arm 9 is hinged to the swing arm 7, the other end of the movable arm 9 is hinged to the connecting piece 11, and the movable arm 9 is used for driving the swing arm 7 to rotate. Specifically, one end of the boom 9 is hinged to the swing arm 7 by a fourth hinge 25. The fourth hinge part 25 can be a pin shaft, the end part of the pin shaft is provided with external threads, and the pin shaft can be limited and fixed by using a nut so as to prevent the pin shaft from falling off and ensure that the movable arm 9 is reliably connected with the swing arm 7. The other end of the movable arm 9 is hinged with the connecting piece 11 through a fifth hinge piece 26, a pin shaft can be selected as the fifth hinge piece 26, external threads are arranged at the end part of the pin shaft, and the movable arm 9 can be limited and fixed by using nuts, so that the movable arm 9 is reliably connected with the connecting piece 11.

The telescopic end of the telescopic driving piece 10 is connected with the connecting piece 11, and the telescopic driving piece 10 is used for driving the connecting piece 11 to move so as to drive the movable arm 9 to swing and further drive the swing arm 7 to rotate. Specifically, as shown in fig. 8, the telescopic driving member 10 may be an electric telescopic rod, and may be fixed to the top of the cab 3 through a connection bracket and a bolt assembly. For example, as shown in fig. 7, when the telescopic driving member 10 is in the retracted state, the connecting member 11 is driven to retract synchronously, so that the connecting member 11 drives the swing arm 9 to swing, and the swing arm 9 drives the swing arm 7 to swing to the front end of the cab 3. As shown in fig. 8, when the telescopic driving member 10 is in the extended state, the driving connecting member 11 is extended synchronously, so that the connecting member 11 drives the swing arm 9 to swing, and the swing arm 9 drives the swing arm 7 to swing to the rear end of the cab 3.

So set up, drive swing arm 9 and swing arm 7 reciprocal swing through the concertina movement of flexible driving piece 10 and connecting piece 11, and then drive auxiliary sight glass 8 and remove to required position. Thereby realizing the automatic switching of the front and back positions of the auxiliary observation mirror 8, needing no frequent manual adjustment, having simple and convenient operation and high degree of automation. Of course, in other embodiments, the telescopic driving member 10 is not limited to the electric telescopic rod, and other driving devices such as a hydraulic rod may be used to implement the reciprocating swing of the swing arm 7.

Further, in the embodiment of the invention, the number of the swing arms 7 is two, the two swing arms 7 are symmetrically arranged at two sides of the cab 3, and the swing arms 9 and the auxiliary observation mirrors 8 are respectively arranged in one-to-one correspondence with the swing arms 7, so that an operator can observe the environments at two sides of the vehicle conveniently. And, two movable arms 9 are hinged to both ends of the link 11. In particular, the connection element 11 can be designed as a fork. The middle part of the connecting piece 11 is fixedly connected with the telescopic end of the telescopic driving piece 10, and the two movable arms 9 are symmetrically hinged at the two ends of the connecting piece 11. So set up, can drive both sides swing arm 9 and swing arm 7 simultaneous movement through connecting piece 11 to realized the synchronous movement of the supplementary sight glass 8 of both sides, the simple operation, convenient to use is reliable.

In an alternative embodiment of the invention, the field of view assistance device further comprises a link 12 and an angle adjustment bracket 13. As shown in fig. 9, one end of the link 12 is slidably connected to the swing arm 7, and the link 12 slides along the length direction of the swing arm 7. One end of the angle adjusting frame 13 is connected with the auxiliary observation mirror 8, and the other end of the angle adjusting frame 13 is hinged with the other end of the connecting rod 12. Specifically, the other end of the angle adjusting frame 13 is provided with a connecting shaft, the end of the connecting rod 12 is provided with a connecting sleeve 121 matched with the connecting shaft, and the connecting shaft is rotatably arranged in the connecting sleeve 121. And the auxiliary observation mirror 8 is rotationally connected with the swing arm 7, and the angle adjusting frame 13 is used for driving the auxiliary observation mirror 8 to rotate under the drive of the connecting rod 12. It should be noted that, in terms of the placement position of the visual field assisting device as shown in fig. 9, the direction indicated by the solid arrow in the drawing is the length direction of the swing arm 7.

Specifically, as shown in fig. 10, in the process of swinging the swing arm 7 from the second position to the first position, the connecting rod 12 is driven to slide along the length direction thereof, so as to drive the angle adjusting frame 13 to rotate, and further drive the auxiliary observation mirror 8 to rotate accordingly, so as to adjust to a proper angle β1. Similarly, when the swing arm 7 swings from the first position to the second position, the auxiliary observation mirror 8 can be driven to rotate finally and adjusted to a proper angle beta 2. It should be noted that, according to the actual design requirement, the dimensions, relative positional relationship, and the like of the swing arm 7, the connecting rod 12, the angle adjusting frame 13, and the auxiliary observation mirror 8 can be specifically designed, so as to satisfy the use requirement of the rotation angle β of the auxiliary observation mirror 8, and facilitate the observation of the operator, and obtain a good visual field range. So set up, realized assisting the automatically regulated of sight glass 8 through link mechanism when preceding/rear end switches, adjust to suitable angle, satisfy driver's observation demand, guarantee the reliable work of device.

In an embodiment of the present invention, the visual field assisting apparatus further includes a first hinge 14, as shown in fig. 9, the first hinge 14 is sequentially disposed through the mounting base 6, the connecting rod 12 and the swing arm 7, and the mounting base 6 and the swing arm 7 are correspondingly provided with a sliding slot adapted to the first hinge 14, and the first hinge 14 is slidably disposed in the sliding slot. Specifically, the first hinge member 14 may be a pin, and the end of the connecting rod 12 is provided with a connecting sleeve 121 adapted to the pin. The pin is fixedly connected with the connecting sleeve 121 and can slide in the sliding grooves of the mounting base 6 and the swing arm 7. Through the mutual cooperation of the first hinge piece 14 and the sliding groove, the device can play a limiting and guiding role on the movement of the connecting rod 12, ensure that the connecting rod 12 stably slides, and further realize the reliable adjustment of the angle of the auxiliary observation mirror 8. In addition, a sliding sleeve 15 may be disposed between the first hinge member 14 and the connecting sleeve 121, and the sliding sleeve 15 is sleeved outside the first hinge member 14 and moves in the sliding groove along with the first hinge member 14, so as to protect the first hinge member 14. The end of the first hinge member 14 may be provided with external threads, and may be fixed by a nut to prevent the first hinge member 14 from falling off.

As an alternative embodiment of the present invention, as shown in fig. 9, the chute on the mounting base 6 is provided as an arc-shaped groove 61, so that the movement track of the swing arm 7 can be satisfied, and thus the first hinge 14 can reliably slide along the arc-shaped groove 61 during the rotation of the swing arm 7. And/or, the chute on the swing arm 7 is provided with a strip-shaped groove 71, and the strip-shaped groove 71 extends along the length direction of the swing arm 7, so that the movement requirement of the first hinge 14 is met, and the connecting rod 12 is ensured to reliably slide along the length direction of the swing arm 7. By means of the mutual matching of the arc-shaped groove 61, the strip-shaped groove 71 and the like, reliable movement of the connecting rod 12 is achieved, and automatic adjustment of the angle of the auxiliary observation mirror 8 is achieved.

In a specific embodiment of the invention, the field of view assistance device further comprises a second hinge 16 and an adapter bracket 17. As shown in fig. 9, the second hinge member 16 is rotatably connected to the swing arm 7, and one end of the second hinge member 16 is connected to the angle adjusting frame 13, so that the second hinge member 16 and the angle adjusting frame 13 can be rotated synchronously under the driving of the link 12.

As shown in fig. 11, the adapter bracket 17 includes a first connection portion 171 and a second connection portion 172 that are connected. The first connection part 171 is connected to the other end of the second hinge member 16, and specifically, the first connection part 171 includes a pair of oppositely disposed connection halves which are fastened to the outside of the second hinge member 16 and are fastened by bolts, thereby fixedly connecting the second hinge member 16 to the adapter frame 17, so that the auxiliary viewer 8 rotates together therewith when the second hinge member 16 rotates about the Z-axis.

The second connection 172 is rotatably connected to the auxiliary scope 8, and the rotation axis of the second hinge 16 is perpendicular to the rotation axis of the auxiliary scope 8. Specifically, the second connection portion 172 includes a U-shaped connection member connected to the first connection portion 171, and the auxiliary scope 8 is provided with a connection lug. The connecting lugs are inserted into the U-shaped openings of the U-shaped connecting pieces and are connected in a rotating manner through pin shafts, and the pin shafts are arranged along the Y-axis direction and perpendicular to the Z-axis as shown in fig. 11. The auxiliary observation mirror 8 is hinged with the transfer frame 17, so that the auxiliary observation mirror 8 can be rotated around the Y axis under the action of external force according to the requirement, and the angle is adjusted to be proper. So set up, can realize through the switching frame 17 that the multi-direction angle of supplementary sight glass 8 is adjustable, satisfy the user demand of different driving objects and operation environment.

As an alternative embodiment of the present invention, the vision assistance device further includes a third hinge 18, as shown in fig. 9, the third hinge 18 is disposed on the mounting base 6, the swing arm 7 is rotatably connected to the third hinge 18, and the lifting lug 19 is disposed on the third hinge 18. Specifically, the third hinge 18 may be a rotation shaft, and the rotation shaft is fixedly disposed on the mounting base 6. The swing arm 7 is provided with a hinge hole adapted to a rotation shaft, and the rotation shaft penetrates through the hinge hole to realize that the swing arm 7 can rotate relative to the mounting base 6. In order to reduce the abrasion between the rotating shaft and the swing arm 7, a wear-resistant sleeve 20 can be arranged between the rotating shaft and the hinge hole, and the wear-resistant sleeve 20 is sleeved outside the rotating shaft. The lifting lug 19 can be a lifting lug bolt, a threaded hole matched with the lifting lug bolt is formed in the top of the rotating shaft, and the lifting lug bolt is fastened in the threaded hole. So set up, in view of the general requirement that has the lug installation at the top of driver's cabin assembly generally, the accessible lug erection site carries out the overall layout of device, realizes the universalization design of device, arranges ingenious, reasonable in design.

In the embodiment of the present invention, the mounting base 6 includes a pair of mounting plates 62, as shown in fig. 9, the pair of mounting plates 62 are spaced apart in the height direction of the cab 3, and the pair of mounting plates 62 may be fixedly mounted on the top of the cab 3 by a bolt assembly, for example. The third hinge 18 is sequentially inserted through a pair of mounting plates 62, and the swing arm 7 is disposed between the pair of mounting plates 62 and is rotatably connected to the third hinge 18. In the placement position of the visual field assistance device shown in fig. 9, the direction indicated by the hollow arrow in the figure is the height direction of the cab 3. So set up, improved the structural stability of mounting base 6, realized the reliable connection of swing arm 7 and mounting base 6, guaranteed that the device safe and reliable work.

In summary, the embodiment of the invention provides a vision auxiliary device, which is suitable for an excavating loader and can provide vision auxiliary functions for excavating and loading different working conditions, specifically, a pair of auxiliary observation mirrors 8 are arranged on a pair of swing arms 7, and an automatic mechanism with rotatable mirror surface angle adjustable is formed through a swing arm 9, a connecting rod 12, a connecting piece 11, a telescopic driving piece 10 and the like, so that the front/rear end switching dual-purpose function of the device is realized. In this way, during loading operation, the swing arm 7 is utilized to ultra-wide extend out of the position of the observation mirror, so that an operator can obtain good front end view, particularly indirect view of the positions of the front wheels and the loading bucket, by means of the observation mirror. During excavation operation, the good back side view can be obtained, the requirements of operators on sensing surrounding environment, coping with emergency and the like are met, and certain special scenes with the requirement of limited width can be met during the posture. View field blind area when can eliminate operating personnel operation by a wide margin through increasing view field auxiliary device, reduces operating personnel's amount of labour, improves work efficiency and equipment security.

The working machine provided by the invention will be described below, and the working machine described below and the visual field assisting device described above can be referred to correspondingly to each other.

The embodiment of the invention also provides a working machine, in particular to a working machine such as an excavating loader. Wherein the work machine comprises a field of view assistance device as in the various embodiments described above. In this way, the visual field assisting device can be added to the working machine such as the backhoe loader, and when the loading operation is performed, the auxiliary observation mirror 8 can be switched to the front end of the cab 3, and the auxiliary observation mirror 8 is out of the vehicle width line 23, so that the operator can observe the positions of the front wheels and the loading bucket, and a good front loading visual field can be obtained. When the excavation work is performed, the auxiliary observation mirror 8 can be switched to the rear end of the cab 3, so that the operator can observe the back side, and a good field of view after excavation can be obtained. And then can satisfy the user demand of preceding/rear end, cover traditional visual field blind area, realize more comprehensive visual field scope, guarantee that operating personnel accurately perceives surrounding environment to in time deal with emergency etc. and reduce operating personnel's intensity of labour, improve the operating efficiency, the security of promotion equipment and driver's travelling comfort. The deriving process of the beneficial effects is substantially similar to that of the above-mentioned visual field assisting device, and thus will not be described herein.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A vision assistance device applied to a work machine, comprising:

A mounting base (6) provided to a cab (3) of the work machine;

A swing arm (7) rotatably provided on the mounting base (6), the swing arm (7) being switchable between a first position and a second position;

The auxiliary observation mirror (8) is arranged on the swing arm (7), when the swing arm (7) is positioned at the first position, the auxiliary observation mirror (8) is positioned at the front end of the cab (3), and the position of the auxiliary observation mirror (8) exceeds the width range of the working machine; when the swing arm (7) is in the second position, the auxiliary observation mirror (8) is positioned at the rear end of the cab (3);

And the driving mechanism is used for driving the swing arm (7) to rotate.

2. The viewing aid of claim 1, wherein the drive mechanism comprises:

one end of the movable arm (9) is hinged with the swing arm (7), and the movable arm (9) is used for driving the swing arm (7) to rotate;

A connecting piece (11) hinged with the other end of the movable arm (9);

the telescopic driving piece (10) is connected with the connecting piece (11) at the telescopic end, and the telescopic driving piece (10) is used for driving the connecting piece (11) to move so as to drive the movable arm (9) to swing.

3. The field of view assistance apparatus of claim 2, wherein the drive mechanism further comprises:

The number of the swing arms (7) is two, the two swing arms (7) are respectively arranged on two sides of the cab (3), the swing arms (9) and the auxiliary observation mirrors (8) are respectively arranged in one-to-one correspondence with the swing arms (7), and the two swing arms (9) are hinged to two ends of the connecting piece (11).

4. The vision assistance device of claim 1, further comprising:

One end of the connecting rod (12) is connected to the swing arm (7) in a sliding manner, and the connecting rod (12) slides along the length direction of the swing arm (7);

The angle adjusting frame (13), its one end with auxiliary observation mirror (8) are connected, the other end with the other end of connecting rod (12) is articulated mutually, just auxiliary observation mirror (8) with swing arm (7) rotate and are connected, angle adjusting frame (13) are used for driving under the drive of connecting rod (12) auxiliary observation mirror (8) rotate.

5. The vision assistance device of claim 4, further comprising:

the first hinge (14) is sequentially arranged on the mounting base (6) in a penetrating mode, the connecting rod (12) is arranged on the swinging arm (7), the mounting base (6) is correspondingly provided with a sliding groove matched with the first hinge (14), and the first hinge (14) is arranged in the sliding groove in a sliding mode.

6. The vision assistance device of claim 4, further comprising:

The second hinge piece (16) is rotationally connected with the swing arm (7), and one end of the second hinge piece (16) is connected with the angle adjusting frame (13);

The switching frame (17) comprises a first connecting part (171) and a second connecting part (172) which are connected, wherein the first connecting part (171) is connected with the other end of the second hinging piece (16), the second connecting part (172) is rotationally connected with the auxiliary observation mirror (8), and the rotation axis of the second hinging piece (16) is perpendicular to the rotation axis of the auxiliary observation mirror (8).

7. The viewing aid according to claim 5, characterized in that the slide groove on the mounting base (6) is provided as an arc-shaped groove (61) and/or the slide groove on the swing arm (7) is provided as an elongated groove (71).

8. The vision assistance device of claim 1, further comprising:

The third hinge piece (18) is arranged on the mounting base (6), and the swing arm (7) is rotationally connected with the third hinge piece (18);

and a lifting lug (19) arranged on the third hinge member (18).

9. The viewing-side assistance device according to claim 8, wherein the mounting base (6) comprises:

The pair of mounting plates (62) are distributed at intervals along the height direction of the cab (3), the third hinge parts (18) sequentially penetrate through the pair of mounting plates (62), and the swing arm (7) is rotatably arranged between the pair of mounting plates (62).

10. A work machine comprising a field of view assistance device according to any one of claims 1 to 9.