CN215165929U

CN215165929U - Limiting device of excavator and excavator with limiting device

Info

Publication number: CN215165929U
Application number: CN202121200171.0U
Authority: CN
Inventors: 王全; 谢进利; 宁静
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Sany Heavy Machinery Ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-14
Anticipated expiration: 2031-05-31

Abstract

The utility model provides a stop device of excavator and have its excavator, wherein, stop device includes: the fixed block is suitable for being fixedly arranged on the excavator body; the first ejector block is movably arranged on the fixed block, and a position adjusting mechanism is arranged between the first ejector block and the fixed block; the switch structure is arranged on the first jacking block and is suitable for controlling the motion state of a movable arm of the excavator; and the second ejector block is suitable for being fixedly arranged on a movable arm of the excavator, and a trigger structure matched with the switch structure is arranged on the second ejector block. The technical scheme of the utility model the height limit structure who has solved the swing arm of excavator among the prior art adjusts the difficulty, occupies the defect that the swing arm space is big.

Description

Limiting device of excavator and excavator with limiting device

Technical Field

The utility model relates to an engineering machine tool technical field, concretely relates to stop device of excavator and have its excavator.

Background

In modern construction, engineering machinery is generally used for earthwork operation, for example, an excavator is used for transporting earth, gravel and stone. However, when the working space of the excavator is narrow, the working range of the excavator is limited, and peripheral personnel, related facilities and the excavator are prevented from being damaged. For example, when an excavator is used in railway construction, there is an obstacle such as a building or a cable above the excavator, and the excavator may collide with existing facilities during operation, and may cause personal injury or death.

In order to limit the working range of an excavator, a limiting device and a protecting device are arranged between a platform and a movable arm of the excavator in the prior art. The limiting device comprises a travel switch arranged on the platform and a trigger block arranged on the movable arm, and when the movable arm is lifted to the trigger block to be in contact with the travel switch, the travel switch controls the movable arm to stop moving. The protection device comprises two collision blocks which are respectively arranged on the platform and the movable arm, when the travel switch fails, the movable arm is continuously lifted to cause the two collision blocks to collide, and therefore hard stop of the movable arm is achieved.

The above structure has the following problems: firstly, if the limiting height of the movable arm is adjusted, the limiting device and the protection device need to be adjusted respectively, which is difficult to ensure the synchronization and the interval consistency of adjustment.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the height-limiting structure of the swing arm of excavator among the prior art and adjusting the difficulty, occupies the defect that the swing arm space is big to a stop device of excavator and have its excavator is provided.

In order to solve the problem, the utility model provides a stop device of excavator, include: the fixed block is suitable for being fixedly arranged on the excavator body; the first ejector block is movably arranged on the fixed block, and a position adjusting mechanism is arranged between the first ejector block and the fixed block; the switch structure is arranged on the first jacking block and is suitable for controlling the motion state of a movable arm of the excavator; and the second ejector block is suitable for being fixedly arranged on a movable arm of the excavator, and a trigger structure matched with the switch structure is arranged on the second ejector block.

Optionally, the position adjusting mechanism comprises an adjusting column, the adjusting column is rotatably arranged on the fixed block, an adjusting hole is formed in the end portion, facing the fixed block, of the first ejecting block, the adjusting column is arranged in the adjusting hole in a penetrating mode, and the adjusting column is connected with the adjusting hole through a threaded structure.

Optionally, the limiting device further comprises a first limiting mechanism, the first limiting mechanism is arranged between the fixed block and the first ejector block, and the first limiting mechanism is suitable for limiting the first ejector block to rotate along the circumferential direction.

Optionally, a vertical plate is arranged on the fixing block, the vertical plate and the adjusting column are arranged in parallel, the first limiting mechanism comprises a sliding groove formed in the vertical plate and a sliding block arranged on the first ejecting block, and the end portion of the sliding block is located in the sliding groove.

Optionally, the limiting device further comprises a second limiting mechanism, the second limiting mechanism is arranged between the fixed block and the adjusting column, and the second limiting mechanism is suitable for limiting the axial movement of the adjusting column relative to the fixed block.

Optionally, the fixed block is provided with a mounting hole, the adjusting column is arranged in the mounting hole in a penetrating mode, the second limiting mechanism comprises a limiting plate arranged on the adjusting column and a limiting step arranged on the inner side wall of the mounting hole, an annular convex portion is arranged on the adjusting column, and the limiting plate and the limiting step are located on two sides of the annular convex portion respectively.

Optionally, the end of the adjustment column facing away from the second ejector block is provided with an operating portion adapted to cooperate with an external tool.

Optionally, the switch structure is a travel switch and the trigger structure is a top plate extending towards the travel switch.

Optionally, a guide slope is provided on a surface of the end of the top plate facing the travel switch.

The utility model also provides an excavator, including foretell stop device, the fixed block is fixed to be set up on the rotary platform of excavator, and the second kicking block is fixed to be set up on the swing arm of excavator.

The utility model has the advantages of it is following:

1. utilize the technical scheme of the utility model, with the switch structure setting on first kicking block, consequently when the distance between first kicking block of position adjustment mechanism adjustment and the fixed block, also adjust the distance between switch structure and the fixed block in step, and then realize the synchro-control of first kicking block and switch structure to guarantee the uniformity of adjusting distance. Meanwhile, the triggering structure is arranged on the second ejector block, so that the space occupied by the second ejector block and the second ejector block is smaller, and other structures such as a hydraulic pipeline are arranged on the movable arm. Consequently the technical scheme of the utility model the height limiting structure who has solved the swing arm of excavator among the prior art adjusts the difficulty, occupies the defect that the swing arm space is big.

2. Can control first kicking block through rotatory regulation post and be close to or keep away from the fixed block motion, consequently stop device has simple structure, adjusts convenient characteristics.

3. The sliding block on the first ejector block of the sliding groove on the vertical plate forms a screw nut mechanism, so that the first ejector block is high in adjusting precision and reliable in movement.

4. Limiting plate and spacing step carry on spacingly from both sides to the regulation post to the axial displacement of restriction regulation post, and then can drive first kicking block along rectilinear movement when making the regulation post rotate.

5. The guide inclined plane on the top plate can prevent the top plate and the travel switch from being clamped, so that the reliability of switch stopping is ensured.

Drawings

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

Fig. 1 is a schematic structural view of a vehicle body and a boom of a construction machine according to the present invention;

FIG. 2 illustrates a schematic view of the construction of the work machine of FIG. 1 at a stop; and

figure 3 shows a schematic cross-sectional view of the spacing device of figure 2.

Description of reference numerals:

10. a fixed block; 11. a vertical plate; 12. mounting holes; 20. a first top block; 21. an adjustment hole; 30. a position adjustment mechanism; 31. an adjustment column; 40. a first limit mechanism; 41. a chute; 42. a slider; 50. a second top block; 60. a trigger structure; 61. a guide ramp; 70. a second limiting mechanism; 71. a limiting plate; 72. a limiting step; 80. a switch structure; 100. a vehicle body; 200. and a movable arm.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, the limiting device of the excavator of the present embodiment includes a fixing block 10, a first top block 20, a switch structure 80, and a second top block 50. Wherein, the fixed block 10 is adapted to be fixedly provided on a vehicle body 100 of the excavator. The first top block 20 is movably disposed on the fixed block 10, and a position adjusting mechanism 30 is disposed between the first top block 20 and the fixed block 10. The switch structure 80 is provided on the first top block 20, and the switch structure 80 is adapted to control a moving state of the boom 200 of the excavator. The second top block 50 is adapted to be fixedly disposed on a movable arm 200 of the excavator, and the second top block 50 is provided with a trigger structure 60 engaged with the switch structure 80.

With the technical solution of this embodiment, the switch structure 80 is disposed on the first ejector block 20, so that when the distance between the first ejector block 20 and the fixed block 10 is adjusted by the position adjusting mechanism 30, the distance between the switch structure 80 and the fixed block 10 is also adjusted synchronously, thereby realizing synchronous adjustment of the first ejector block 20 and the switch structure 80, and ensuring consistency of the adjustment distance. Meanwhile, the triggering structure 60 is disposed on the second top block 50, so that the two occupy less space of the boom 200, which is beneficial for arranging other structures such as a hydraulic pipeline on the boom 200. Therefore, the technical scheme of the embodiment overcomes the defects that the height limiting structure of the movable arm of the excavator in the prior art is difficult to adjust and occupies a large movable arm space.

It should be noted that, the working process of the above-mentioned limiting device is as follows: when the movable arm 200 moves, the second top block 50 and the trigger structure 60 are driven to move synchronously. When the trigger structure 60 contacts the switch structure 80, the switch structure 80 is triggered to control the movable arm 200 to stop moving, so as to achieve the effect of limiting the movable arm 200. When the switch structure 80 fails, the first top block 20 and the second top block 50 collide due to the continuous movement of the movable arm 200, so that the hard stop of the movable arm 200 is realized, and the use safety of the excavator is ensured. Further, when the movement range of the movable arm 200 needs to be adjusted, the distance between the first top block 20 and the fixed block 10 can be adjusted by the position adjusting mechanism. As will be understood by those skilled in the art with reference to fig. 2, the closer the distance between the first top block 20 and the bracket of the fixed block 10 is, the larger the movement range of the movable arm 200 is, and conversely, the farther the distance between the first top block 20 and the bracket of the fixed block 10 is, the smaller the movement range of the movable arm 200 is. Meanwhile, as the switch structure 80 is arranged on the first ejector block 20, when the distance between the first ejector block 20 and the fixed block 10 is adjusted, the distance between the switch structure 80 and the fixed block 10 is also synchronously adjusted, and the adjustment consistency of the switch stop and the hard stop of the limiting device is ensured.

As shown in fig. 2, in the solution of the present embodiment, the position adjusting mechanism 30 includes an adjusting column 31, and the adjusting column 31 is rotatably disposed on the fixed block 10. The end part of the first top block 20 facing the fixed block 10 is provided with an adjusting hole 21, an adjusting column 31 is arranged in the adjusting hole 21 in a penetrating way, and the adjusting column 31 is connected with the adjusting hole 21 through a thread structure. As can be seen from fig. 2, the first top block 20 includes a connecting column and an impact head provided at an end of the connecting column, the impact head being engaged with the second top block 50. The end surface of the connecting column facing the fixing block 10 is provided with the adjusting hole 21. The thread structure includes an external thread provided on the outer end face of the adjustment post 31, and an internal thread provided on the inner wall of the adjustment hole 21. When the adjusting column 31 and the first top block 20 rotate relatively, the first top block 20 can be moved close to the fixed block 10 or moved away from the fixed block 10.

As shown in fig. 2, in the solution of this embodiment, the limiting device further includes a first limiting mechanism 40, the first limiting mechanism 40 is disposed between the fixed block 10 and the first top block 20, and the first limiting mechanism 40 is adapted to limit the rotation of the first top block 20 along the circumferential direction. The first limiting mechanism 40 enables the first top block 20 not to rotate circumferentially but only to perform translational motion along the axial direction of the adjusting column 31 when the adjusting column 31 and the first top block 20 rotate relatively. The first top block 20 can be controlled to move towards the fixed block 10 or move away from the fixed block 10 by controlling the forward rotation or the reverse rotation of the adjusting column 31.

As shown in fig. 2, in the technical solution of this embodiment, an upright plate 11 is disposed on the fixed block 10, and the upright plate 11 and the adjusting column 31 are disposed in parallel. The first limiting mechanism 40 includes a sliding groove 41 disposed on the vertical plate 11, and a sliding block 42 disposed on the first top block 20, and an end of the sliding block 42 is located in the sliding groove 41. Specifically, the extending direction of the slide groove 41 is the same as the extending direction of the adjusting column 31. The sliding block 42 is a strip structure, one end of the sliding block 42 is connected to the connecting column of the first top block 20, and the other end of the sliding block 42 extends into the sliding groove 41. Therefore, when the adjusting column 31 rotates, the first top block 20 cannot rotate under the limiting action of the sliding groove 41 and the sliding block 42, and can only do translational motion. The above-described adjusting column 31, first top block 20, slide groove 41, and slider 42 form a structure similar to a lead screw-nut mechanism.

As shown in fig. 2, in the solution of the present embodiment, the limiting device further includes a second limiting mechanism 70. A second limiting mechanism 70 is disposed between the fixed block 10 and the adjustment post 31, the second limiting mechanism 70 being adapted to limit axial movement of the adjustment post 31 relative to the fixed block 10. Specifically, the second limit mechanism 70 allows the adjustment column 31 to rotate only in the circumferential direction, but cannot move in the axial direction. Therefore, when the adjusting column 31 is rotated, the first top block 20 can move along the axial direction of the adjusting column 31 under the action of the sliding groove 41 and the sliding block 42, so that the first top block 20 moves close to or away from the fixed block 10.

As shown in fig. 3, in the technical solution of this embodiment, a mounting hole 12 is formed in the fixed block 10, the adjusting column 31 is inserted into the mounting hole 12, the second limiting mechanism 70 includes a limiting plate 71 and a limiting step 72 that are disposed on the adjusting column 31, and the limiting plate 71 and the limiting step 72 are respectively located at two sides of the fixed block 10. Specifically, as can be seen from fig. 3, the mounting hole 12 is a stepped hole, so that the inner wall of the mounting hole 12 forms the above-mentioned limit step 72. The outer peripheral surface of the adjusting column 31 is provided with an annular convex part, when the adjusting column 31 is installed, the annular convex part is clamped into the stepped hole, and one end surface of the annular convex part is abutted to the limiting step 72. The middle part of the limit plate 71 is provided with a mounting hole, the limit plate 71 passes through the adjusting column 31 and then covers the mounting hole 12, and therefore the limit plate 71 is abutted to the other end face of the annular convex part. Thus, the limit step 72 and the limit plate 71 limit the axial movement of the adjustment post 31 from both directions. Furthermore, an end surface of the adjusting column 31 facing away from the first top block 20 is provided with an operation portion such as an inner hexagonal (or outer hexagonal) for facilitating the application of force by an external tool, so that an operator can rotate the adjusting column 31 by the external tool.

As shown in fig. 2, in the solution of the present embodiment, the switch structure 80 is a travel switch, and the trigger structure 60 is a top plate extending toward the travel switch. Specifically, the travel switch is provided with a switch post extending outward. A top plate is provided at a side of the second top block 50, and moves toward the stroke switch when the movable arm 200 moves. When the top plate contacts with the switch column and presses the switch column, the travel switch is triggered, and the movable arm 200 is controlled to stop moving, so that the movable arm 200 is limited.

As shown in fig. 2, in the present embodiment, a guide slope 61 is provided on a surface of the end of the top plate facing the stroke switch. The guide slope 61 can press down the switch post of the travel switch while preventing the switch post and the top plate from being stuck.

The embodiment also provides an excavator, and the limiting device is described above. Further, the fixed block 10 is fixedly provided on a swing platform of the excavator, and the second top block 50 is fixedly provided on a boom of the excavator.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a stop device of excavator which characterized in that includes:

the fixed block (10) is suitable for being fixedly arranged on the excavator body (100);

the first ejector block (20) is movably arranged on the fixed block (10), and a position adjusting mechanism (30) is arranged between the first ejector block (20) and the fixed block (10);

a switch structure (80) provided on the first top block (20), the switch structure (80) being adapted to control a motion state of a boom (200) of the excavator;

the second ejector block (50) is suitable for being fixedly arranged on the movable arm (200) of the excavator, and a trigger structure (60) matched with the switch structure (80) is arranged on the second ejector block (50).

2. The limiting device according to claim 1, wherein the position adjusting mechanism (30) comprises an adjusting column (31), the adjusting column (31) is rotatably disposed on the fixing block (10), an adjusting hole (21) is disposed at an end portion of the first top block (20) facing the fixing block (10), the adjusting column (31) is inserted into the adjusting hole (21), and the adjusting column (31) and the adjusting hole (21) are connected through a threaded structure.

3. The spacing device according to claim 2, characterized in that it further comprises a first spacing mechanism (40), said first spacing mechanism (40) being arranged between said fixed block (10) and said first top block (20), said first spacing mechanism (40) being adapted to limit the rotation of said first top block (20) in the circumferential direction.

4. The limiting device according to claim 3, wherein a vertical plate (11) is arranged on the fixed block (10), the vertical plate (11) and the adjusting column (31) are arranged in parallel, the first limiting mechanism (40) comprises a sliding groove (41) arranged on the vertical plate (11) and a sliding block (42) arranged on the first top block (20), and an end of the sliding block (42) is located in the sliding groove (41).

5. Stop device according to claim 2, characterized in that it further comprises a second stop mechanism (70), said second stop mechanism (70) being arranged between said fixed block (10) and said adjustment post (31), said second stop mechanism (70) being adapted to limit the axial movement of said adjustment post (31) with respect to said fixed block (10).

6. The limiting device according to claim 5, wherein a mounting hole (12) is formed in the fixing block (10), the adjusting column (31) is arranged in the mounting hole (12) in a penetrating manner, the second limiting mechanism (70) comprises a limiting plate (71) arranged on the adjusting column (31) and a limiting step (72) arranged on the inner side wall of the mounting hole (12), an annular convex portion is arranged on the adjusting column (31), and the limiting plate (71) and the limiting step (72) are respectively located on two sides of the annular convex portion.

7. Stop device according to any of claims 2 to 6, characterized in that the end of the adjustment column (31) facing away from the second ejector block (50) is provided with an operating portion adapted to cooperate with an external tool.

8. Stop device according to claim 1, characterized in that the switch structure (80) is a travel switch and the trigger structure (60) is a top plate extending towards the travel switch.

9. Stop device according to claim 8, characterized in that a guiding ramp (61) is provided on the surface of the end of the top plate facing the travel switch.

10. Excavator, characterized in that it comprises a stop device according to any one of claims 1 to 9, said fixed block (10) being fixedly arranged on the revolving platform of said excavator, said second top block (50) being fixedly arranged on the boom of said excavator.