阅读说明：本技术 挖掘机铲斗油缸防护机构 (Oil cylinder protection mechanism of excavator bucket ) 是由 许延坡 申欣 李均刚 朱梓明 李进 于 2021-07-07 设计创作，主要内容包括：本发明提供一种挖掘机铲斗油缸防护机构,包括斗杆、铲斗和铲斗油缸,该挖掘机铲斗油缸防护机构还包括前支撑架、后支撑架、摇杆、连杆和防护装置,前支撑架为三角形结构,铲斗上设有耳板,前支撑架的第一端与耳板通过第一旋转轴铰接；前支撑架的第二端与摇杆的一端通过第二旋转轴铰接,摇杆的另一端与斗杆铰接,连杆的两端分别与第一旋转轴和第二旋转轴铰接,铲斗油缸的前端与第二旋转轴铰接,铲斗油缸的后端与斗杆铰接；前支撑架的第三端与防护装置的前端通过第三旋转轴铰接,后支撑架固定于斗杆的后端,防护装置的后端与后支撑架通过第四旋转轴铰接,防护装置位于铲斗油缸的上方并与铲斗油缸间隔设置,防护装置为可伸缩的结构。(The invention provides an excavator bucket oil cylinder protection mechanism which comprises a bucket rod, a bucket and a bucket oil cylinder, and further comprises a front support frame, a rear support frame, a rocker, a connecting rod and a protection device, wherein the front support frame is of a triangular structure, the bucket is provided with an ear plate, and a first end of the front support frame is hinged with the ear plate through a first rotating shaft; the second end of the front support frame is hinged with one end of a rocker through a second rotating shaft, the other end of the rocker is hinged with the bucket rod, two ends of a connecting rod are respectively hinged with the first rotating shaft and the second rotating shaft, the front end of the bucket oil cylinder is hinged with the second rotating shaft, and the rear end of the bucket oil cylinder is hinged with the bucket rod; the third end of the front supporting frame is hinged with the front end of the protecting device through a third rotating shaft, the rear supporting frame is fixed at the rear end of the bucket rod, the rear end of the protecting device is hinged with the rear supporting frame through a fourth rotating shaft, the protecting device is located above the bucket oil cylinder and arranged at intervals with the bucket oil cylinder, and the protecting device is of a telescopic structure.)

1. The protection mechanism for the bucket cylinder of the excavator comprises a bucket rod (1), a bucket (2) and a bucket cylinder (3), wherein the bucket (2) is positioned in front of the bucket rod (1) and hinged with the front end of the bucket rod (1), and the bucket cylinder (3) is positioned above the bucket rod (1), and is characterized by further comprising a front support frame (4), a rear support frame (5), a rocker (61), a connecting rod (62) and a protection device (7), wherein the front support frame (4) is of a triangular structure, an ear plate (21) is arranged on the bucket (2), and the first end of the front support frame (4) is hinged with the ear plate (21) through a first rotating shaft (81); the second end of the front support frame (4) is hinged to one end of the rocker (61) through a second rotating shaft (82), the other end of the rocker (61) is hinged to the bucket rod (1), two ends of the connecting rod (62) are hinged to the first rotating shaft (81) and the second rotating shaft (82) respectively, the front end of the bucket cylinder (3) is hinged to the second rotating shaft (82), and the rear end of the bucket cylinder (3) is hinged to the bucket rod (1); the third end of preceding support frame (4) with the front end of protector (7) is articulated through third rotation axis (83), back support frame (5) are fixed in the rear end of dipper (1), the rear end of protector (7) with back support frame (5) are articulated through fourth rotation axis (84), protector (7) are located the top of scraper bowl hydro-cylinder (3) and with scraper bowl hydro-cylinder (3) interval sets up, protector (7) are the telescopic structure.

2. The excavator bucket cylinder guard mechanism of claim 1 wherein said guard (7) comprises a slide bar (71) and a guide bar (72), said guide bar (72) being connected to said slide bar (71), said guide bar (72) being slidable relative to said slide bar (71) and extending or shortening said guard (7), one of said guide bar (72) and said slide bar (71) being articulated to said third pivot axis (83), the other of said guide bar (72) and said slide bar (71) being articulated to said fourth pivot axis (84).

3. The excavator bucket cylinder guard mechanism of claim 2 wherein the guide rod (72) is provided with a slide groove (721) in the axial direction, the slide rod (71) is provided with a boss (711), and the boss (711) is inserted into the slide groove (721) and is slidable along the slide groove (721).

4. The cylinder guard mechanism of the bucket of the excavator according to claim 3, wherein the number of the guide rods (72) is two, the two guide rods (72) are arranged at intervals and are respectively located at two sides of the sliding rod (71), the protrusions (711) are respectively arranged at two sides of the sliding rod (71), and the protrusions (711) at two sides of the sliding rod (71) are respectively inserted into the sliding grooves (721) of the two guide rods (72).

5. The protection mechanism for the oil cylinder of the bucket of the excavator as claimed in claim 4, wherein said protection device (7) further comprises a front shaft sleeve (73), a rear shaft sleeve (74) and a supporting block (75), said front shaft sleeve (73) is fixed at the front end of said guide rod (72) and is clamped between two guide rods (72), said front shaft sleeve (73) is sleeved on said third rotation shaft (83), said supporting block (75) is fixed at the rear end of said guide rod (72) and is clamped between two guide rods (72); the rear shaft sleeve (74) is fixed at the rear end of the sliding rod (71), and the rear shaft sleeve (74) is sleeved on the fourth rotating shaft (84).

6. The excavator bucket cylinder guard mechanism as recited in claim 5, characterized in that the number of said guards (7) is plural, a plurality of said guards (7) are arranged in parallel at intervals, and bushings (76) are provided between a front bushing (73) of said guard (7) and said front support frame (4), between front bushings (73) of two adjacent said guards (7), and between rear bushings (74) of two adjacent said guards (7).

7. The excavator bucket cylinder guard mechanism of claim 1 wherein the number of said front support frames (4) and said ear plates (21) is two, two of said front support frames (4) and two of said ear plates (21) are provided corresponding to both sides of said bucket (2), respectively, and each of said front support frames (4) and one of said ear plates (21) are located close to each other, and said first rotation shaft (81) is connected to both of said front support frames (4) and said two of said ear plates (21) at the same time.

8. The excavator bucket cylinder guard mechanism as recited in claim 7, wherein said plurality of said connecting rods (62) are provided in plurality, a plurality of said connecting rods (62) are provided between two of said front support frames (4), and both ends of a plurality of said connecting rods (62) are respectively hinged to said first rotating shaft (81) and said second rotating shaft (82).

9. The cylinder guard mechanism of a bucket of an excavator according to claim 1, wherein the number of the rocking levers (61) is two, and the two rocking levers (61) are provided corresponding to both sides of the arm (1), respectively.

10. The excavator bucket cylinder guard mechanism of claim 1, wherein the number of the rear support frames (5) is two, two of the rear support frames (5) are respectively provided corresponding to both sides of the arm (1), and both ends of the fourth rotation shaft (84) are respectively connected to the two rear support frames (5).

Technical Field

The invention relates to the technical field of excavator structures, in particular to an excavator bucket cylinder protection mechanism.

Background

The oil cylinder plays a role as an actuator in a working device as a common component in an excavator, and is divided into a boom cylinder, a bucket bar cylinder, and a bucket cylinder. Under the mutual cooperation of the three types of oil cylinders, the excavator has strong excavating force, wherein the thrust provided by the bucket oil cylinder accounts for the largest proportion of the excavating force.

An excavator generally includes an arm and a bucket hinged to a front end of the arm, and a bucket cylinder is hinged to the bucket and the arm at both ends thereof, respectively, so as to rotate the bucket relative to the arm to perform an excavating work. Whether the bucket cylinder normally works or not is important, the excavator usually works under the open environment, the bucket cylinder is generally arranged above the bucket rod, the bucket cylinder can be damaged due to external force or impact of materials, a protection device is not arranged on the bucket cylinder of the existing earthwork excavator, and the quality of the bucket cylinder is also tested.

Among the prior art, some excavators have set up protector to the scraper bowl hydro-cylinder, like the excavator scraper bowl hydro-cylinder protection machanism that publication number CN108487364B discloses, it includes dipper, scraper bowl link mechanism, scraper bowl hydro-cylinder and hydro-cylinder protection machanism, hydro-cylinder protection machanism includes pendulum rod and the scraper bowl hydro-cylinder guard plate of two-bar structure, the pendulum rod lower extreme rotates with the dipper to be connected, the pendulum rod upper end rotates through the rear end of round pin axle with scraper bowl hydro-cylinder guard plate to be connected, scraper bowl hydro-cylinder guard plate be located the top of scraper bowl hydro-cylinder and the front end of scraper bowl hydro-cylinder guard plate with scraper bowl link mechanism's rear end rotates to be connected. The excavator bucket oil cylinder protection mechanism increases the complexity of mechanism movement on the basis of the original design, and then increases the operation difficulty; meanwhile, a supporting structure is arranged on the bucket rod, so that the risk that the bucket rod is damaged during operation is increased; and adopt welded mode to connect, after the collision damage, it is comparatively troublesome to change the part. Therefore, the protective device for the oil cylinder of the bucket of the excavator, which has a simple structure, is stable and reliable and does not influence the motion of the original mechanism, needs to be designed.

Disclosure of Invention

The invention aims to provide a protective mechanism for an oil cylinder of a bucket of an excavator, which aims to overcome the defects in the prior art, provides good protection for the oil cylinder of the bucket on the basis of not influencing the movement of the original mechanism, and has the advantages of simple structure, stability, reliability and lower cost.

The invention provides an excavator bucket oil cylinder protection mechanism which comprises a bucket rod, a bucket and a bucket oil cylinder, wherein the bucket is positioned in front of the bucket rod and is hinged with the front end of the bucket rod; the second end of the front support frame is hinged with one end of the rocker through a second rotating shaft, the other end of the rocker is hinged with the bucket rod, two ends of the connecting rod are respectively hinged with the first rotating shaft and the second rotating shaft, the front end of the bucket oil cylinder is hinged with the second rotating shaft, and the rear end of the bucket oil cylinder is hinged with the bucket rod; the third end of preceding support frame with protector's front end is articulated through the third swivel axis, the back support frame is fixed in the rear end of dipper, protector's rear end with the back support frame is articulated through the fourth swivel axis, protector is located the top of scraper bowl hydro-cylinder and with scraper bowl hydro-cylinder interval sets up, protector is the telescopic structure.

Further, the protection device comprises a sliding rod and a guide rod, the guide rod is connected with the sliding rod, the guide rod can slide relative to the sliding rod and enable the protection device to extend or shorten, one of the guide rod and the sliding rod is hinged to the third rotating shaft, and the other of the guide rod and the sliding rod is hinged to the fourth rotating shaft.

Furthermore, the guide rod is provided with a sliding groove along the axial direction, the sliding rod is provided with a boss, and the boss is inserted into the sliding groove and can slide along the sliding groove.

Furthermore, the number of the guide rods is two, the two guide rods are arranged at intervals and are respectively located on two sides of the sliding rod, the two sides of the sliding rod are respectively provided with the protruding portions, and the protruding portions on the two sides of the sliding rod are respectively inserted into the sliding grooves of the two guide rods.

Furthermore, the protection device further comprises a front shaft sleeve, a rear shaft sleeve and a supporting block, wherein the front shaft sleeve is fixed at the front ends of the guide rods and clamped between the two guide rods, the front shaft sleeve is sleeved on the third rotating shaft, and the supporting block is fixed at the rear ends of the guide rods and clamped between the two guide rods; the rear shaft sleeve is fixed at the rear end of the sliding rod, and the rear shaft sleeve is sleeved on the fourth rotating shaft.

Furthermore, the number of the protection devices is multiple, the protection devices are arranged in parallel at intervals, and shaft sleeves are arranged between the front shaft sleeves of the protection devices and the front support frame, between the front shaft sleeves of the two adjacent protection devices and between the rear shaft sleeves of the two adjacent protection devices.

Further, the front support frame with the quantity of otic placode is two, two front support frame and two the otic placode is equallyd divide and is do not corresponded the both sides setting of scraper bowl, and every front support frame and one the otic placode is close to each other, first rotation axis simultaneously with two front support frame and two the otic placode links to each other.

Furthermore, the number of the connecting rods is multiple, the connecting rods are located between the two front support frames, and two ends of the connecting rods are hinged to the first rotating shaft and the second rotating shaft respectively.

Furthermore, the number of the rocking rods is two, and the two rocking rods are respectively arranged corresponding to two sides of the bucket rod.

Furthermore, the number of the rear support frames is two, the two rear support frames are respectively arranged corresponding to two sides of the bucket rod, and two ends of the fourth rotating shaft are respectively connected with the two rear support frames.

According to the excavator bucket oil cylinder protection mechanism provided by the invention, the protection device is positioned above the bucket oil cylinder and shields the whole bucket oil cylinder, so that a good protection effect can be provided for the bucket oil cylinder, the bucket oil cylinder is prevented from being damaged due to external force or material impact, meanwhile, the protection device is of a telescopic structure, when the bucket and the bucket rod rotate relatively, the protection device stretches together, the movement between the bucket and the bucket rod is not influenced, and redundant movement actions are not increased.

According to the invention, only the front support frame, the rear support frame and the protection device are added on the basis of the original design, compared with the excavator bucket oil cylinder protection mechanism in the prior art, the number of structural members is increased little, the whole weight is increased little, and the labor cost and the material cost can be reduced. Meanwhile, the front support frame with a triangular structure is used as the middle connecting piece and is simultaneously hinged with the lug plate, the rocker, the connecting rod, the protective device and the bucket cylinder, the linkage among all the parts is good, the movement action is compact, stable and reliable, meanwhile, the front support frame shares part of stress (the stress is originally loaded on the rocker and the connecting rod), the strength and the service life of the rocker and the connecting rod can be improved, and the front support frame is convenient to disassemble and replace. Therefore, the invention has the advantages of simple structure, stability, reliability, small weight increase and low cost.

Drawings

Fig. 1 is a schematic perspective view of a bucket cylinder guard mechanism of an excavator according to a first embodiment of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a schematic view of the connection of the guard of fig. 1 to the front and rear support frames.

Fig. 4 is a schematic diagram of the exploded structure of fig. 3.

Fig. 5 is a schematic view of the exploded structure of the shielding device of fig. 3.

Fig. 6 is a schematic view of the connection between the rear support frame and the cylinder connection lug plate according to the second embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms of orientation, up, down, left, right, front, back, top, bottom, and the like (if any) referred to in the specification and claims of the present invention are defined by the positions of structures in the drawings and the positions of the structures relative to each other, only for the sake of clarity and convenience in describing the technical solutions. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

As shown in fig. 1 to 3, the excavator bucket cylinder protection mechanism according to the embodiment of the present invention includes an arm 1, a bucket 2, and a bucket cylinder 3, where the bucket 2 is located in front of the arm 1 and hinged to a front end of the arm 1, and the bucket cylinder 3 is located above the arm 1. The excavator bucket cylinder protection mechanism further comprises a front support frame 4, a rear support frame 5, a rocker 61, a connecting rod 62 and a protection device 7. The front support frame 4 is of a triangular structure, the bucket 2 is provided with an ear plate 21, and the first end of the front support frame 4 is hinged with the ear plate 21 through a first rotating shaft 81. The second end of the front support frame 4 is hinged to one end of the rocker 61 through a second rotating shaft 82, the other end of the rocker 61 is hinged to the arm 1, two ends of the connecting rod 62 are hinged to the first rotating shaft 81 and the second rotating shaft 82 respectively, the front end of the bucket cylinder 3 is hinged to the second rotating shaft 82, and the rear end of the bucket cylinder 3 is hinged to the arm 1. The third end of front support frame 4 is articulated through third rotation axis 83 with the front end of protector 7, and back support frame 5 is fixed in the rear end of dipper 1, and the rear end of protector 7 is articulated through fourth rotation axis 84 with back support frame 5, and protector 7 is located the top of bucket hydro-cylinder 3 and sets up with bucket hydro-cylinder 3 interval, and protector 7 is the telescopic structure.

Further, as shown in fig. 1, in the present embodiment, the number of the front brackets 4 and the ear plates 21 is two, the two front brackets 4 and the two ear plates 21 are respectively disposed corresponding to both sides of the bucket 2, each front bracket 4 and one ear plate 21 are close to each other, and the first rotating shaft 81 is connected to both the two front brackets 4 and the two ear plates 21.

Further, as shown in fig. 1, in the present embodiment, the number of the links 62 is plural, the plural links 62 are located between the two front support frames 4, and both ends of the plural links 62 are respectively hinged to the first rotating shaft 81 and the second rotating shaft 82. In the present embodiment, the number of the connecting rods 62 is three to enhance the connection strength between the first rotating shaft 81 and the second rotating shaft 82, and of course, in other embodiments, the number of the connecting rods 62 may be one, two or more.

Further, as shown in fig. 1, in the present embodiment, the number of the rocking bars 61 is two, two rocking bars 61 are respectively disposed corresponding to two sides of the arm 1, and the two rocking bars 61 are respectively hinged to the second rotating shaft 82 and the arm 1.

Further, as shown in fig. 1, in the present embodiment, the number of the rear support frames 5 is two, the two rear support frames 5 are respectively disposed corresponding to both sides of the arm 1, and both ends of the fourth rotation shaft 84 are respectively connected to the two rear support frames 5.

Further, as shown in fig. 1 and 2, in the present embodiment, a cylinder connection lug plate 11 is fixed to a rear end of the arm 1, and a rear end of the bucket cylinder 3 is hinged to the cylinder connection lug plate 11 via a fifth rotation shaft 85. The rear support frame 5 and the oil cylinder connecting lug plate 11 are fixed at the rear end of the bucket rod 1 through welding. As shown in fig. 6, in another embodiment, the rear support frame 5 is attached to the cylinder connecting lug plate 11 (the rear support frame 5 and the cylinder connecting lug plate 11 may or may not be welded together), and the rear support frame 5 is provided with a through hole 51 for the fifth rotation shaft 85 to pass through, that is, the fifth rotation shaft 85 is connected to the cylinder connecting lug plate 11 and the rear support frame 5 at the same time, so as to enhance the strength of the cylinder connecting lug plate 11 and the rear support frame 5.

Further, as shown in fig. 2, in the present embodiment, the rocker 61 is hinged to the arm 1 by a sixth rotation shaft 86, and the lug 21 is hinged to the front end of the arm 1 by a seventh rotation shaft 87.

Specifically, in fig. 2, the bucket 2 is in a state of rotating to the lowest end (i.e. the bucket 2 retracts inward to the maximum extent, and at this time, the bucket cylinder 3 extends to the maximum stroke), when the bucket cylinder 3 retracts inward (the stroke of the bucket cylinder is shortened), the bucket cylinder 3 drives the second rotating shaft 82 to move backward, at this time, the rocker 61, the front support frame 4 and the connecting rod 62 all move backward and rotate, and at the same time, the bucket 2 is driven to rotate outward, and at this time, the protection device 7 performs retracting movement correspondingly; when the bucket cylinder 3 extends outwards (the stroke of the bucket cylinder is lengthened), the bucket cylinder 3 pushes the second rotating shaft 82 to move forwards, at this time, the rocker 61, the front support frame 4 and the connecting rod 62 all move forwards and rotate reversely, at the same time, the bucket 2 is driven to rotate inwards, at this time, the protection device 7 correspondingly extends, and finally, the state shown in fig. 2 is recovered. In the process, the movement of the guard 7 does not affect the movement of the other components at all times.

Further, in the present embodiment, the first rotation shaft 81, the second rotation shaft 82, the third rotation shaft 83, the fourth rotation shaft 84, the fifth rotation shaft 85, the sixth rotation shaft 86, and the seventh rotation shaft 87 are all pin shafts.

Further, as shown in fig. 3 to 5, in the present embodiment, the guard 7 includes a slide bar 71 and a guide bar 72, the guide bar 72 is connected to the slide bar 71, and the guide bar 72 can slide relative to the slide bar 71 and extend or shorten the guard 7. One of the guide rod 72 and the slide bar 71 is hinged to the third rotation shaft 83, and the other of the guide rod 72 and the slide bar 71 is hinged to the fourth rotation shaft 84.

Further, as shown in fig. 5, in the present embodiment, the guide rod 72 is provided with a slide slot 721 in the axial direction, the slide rod 71 is provided with a boss 711, and the boss 711 is inserted into the slide slot 721 and can slide along the slide slot 721.

Further, as shown in fig. 5, in the present embodiment, the number of the guide rods 72 is two, the two guide rods 72 are disposed at intervals and located at two sides of the sliding rod 71, the two sides of the sliding rod 71 are both provided with the protruding portions 711, and the protruding portions 711 at two sides of the sliding rod 71 are inserted into the sliding slots 721 of the two guide rods 72, respectively. Specifically, the width of the sliding slot 721 is slightly larger than the thickness of the protruding portion 711, and the distance between the two guide rods 72 is slightly larger than the width of the sliding rod 71.

Further, as shown in fig. 4 and 5, in the present embodiment, the guide rod 72 is hinged to the third rotating shaft 83, and the slide rod 71 is hinged to the fourth rotating shaft 84 (of course, in other embodiments, the slide rod 71 may be hinged to the third rotating shaft 83, and the guide rod 72 may be hinged to the fourth rotating shaft 84). The protection device 7 further comprises a front bushing 73, a rear bushing 74 and a supporting block 75, wherein the front bushing 73 is fixed at the front end of the guide rods 72 and is clamped between the two guide rods 72. The front shaft sleeve 73 is sleeved on the third rotating shaft 83, and the supporting block 75 is fixed at the rear end of the guide rod 72 and is clamped between the two guide rods 72. The rear shaft sleeve 74 is fixed at the rear end of the sliding rod 71, and the rear shaft sleeve 74 is sleeved on the fourth rotating shaft 84.

Specifically, the front bushing 73 functions to connect the guide rods 72 and the third rotation shaft 83, on the one hand, and to connect the front ends of the two guide rods 72 together and to be spaced apart from each other, on the other hand; the support block 75 serves to connect the rear ends of the two guide rods 72 together and to be spaced apart from each other, thereby maintaining a certain distance between the two guide rods 72 (to facilitate the sliding of the slide bar 71) and also serving to support the slide bar 71 (the slide bar 71 rides on the support block 75). The rear bushing 74 functions to connect the slide bar 71 with the fourth rotation shaft 84. Through first bolt 91 fixed connection between preceding axle sleeve 73 and the guide arm 72, through second bolt 92 fixed connection between supporting shoe 75 and the guide arm 72, through third bolt 93 fixed connection between back axle sleeve 74 and the slide bar 71, this kind of bolted connection's structure is both easy to assemble, convenient dismantlement again, when protector 7 produces deformation when needing to be changed receiving big impact force or great object collision, can conveniently dismantle and install, thereby improve maintenance speed, do not influence the job schedule.

Further, in the present embodiment, the sliding rod 71 and the guide rod 72 are made of steel, which not only has good strength, but also can achieve the effect of portability, thereby avoiding increasing the weight of the working device.

Further, as shown in fig. 1, 3 and 4, the number of the guards 7 is plural, and the plural guards 7 are arranged in parallel at intervals. Bushings 76 are provided between the front bushings 73 of the guards 7 and the front support frame 4, between the front bushings 73 of two adjacent guards 7 and between the rear bushings 74 of two adjacent guards 7. In this embodiment, the number of the protection devices 7 is two, the two protection devices 7 are arranged in parallel at intervals, the number of the protection devices 7 can be determined according to actual requirements, and the protection devices 7 can shield the whole bucket cylinder 3. In the present embodiment, the number of the shaft sleeves 76 is four, and the four shaft sleeves 76 are respectively sleeved on the third rotating shaft 83 and the fourth rotating shaft 84.

Specifically, the shaft sleeve 76 can play a positioning role, so that the plurality of protection devices 7 can be spaced, and the protection devices 7 can be prevented from swinging left and right, so that the protection devices 7 are prevented from being directly contacted and abraded due to long-time work.

Further, as shown in fig. 4, in the present embodiment, a washer 77 is interposed between the rear shaft sleeve 74 and the rear support frame 5, the washer 77 is sleeved on the fourth rotation shaft 84, and the washer 77 is used for preventing the rear shaft sleeve 74 from being worn due to direct contact with the rear support frame 5.

The excavator bucket cylinder protection mechanism that this embodiment provided has:

1. in the embodiment, the protective device 7 is arranged, and the protective device 7 is positioned above the bucket cylinder 3 and shields the whole bucket cylinder 3, so that a good protective effect can be provided for the bucket cylinder 3, the bucket cylinder 3 is prevented from being damaged due to external force or impact of materials, and the service life of the bucket cylinder 3 is prolonged; meanwhile, the protective device 7 is of a telescopic structure, when the bucket 2 and the bucket rod 1 rotate relatively, the protective device 7 stretches together without influencing the movement between the bucket 2 and the bucket rod 1, and redundant movement actions are not increased.

2. This embodiment is through increasing front support frame 4, back support frame 5 and protector 7 on original design basis, and it is few to compare in prior art's excavator bucket hydro-cylinder protection mechanism's structure increase quantity, and whole weight increases lessly, can reduce cost of labor and material cost.

3. In the embodiment, the front support frame 4 with a triangular structure is used as an intermediate connecting piece, the front support frame 4 is simultaneously hinged with the ear plate 21, the rocker 61, the connecting rod 62, the protective device 7 and the bucket cylinder 3, the linkage among all the parts is good, the movement action is compact, stable and reliable, and meanwhile, the front support frame 4 shares part of stress (the stress is originally loaded on the rocker 61 and the connecting rod 62), so that the strength and the service life of the rocker 61 and the connecting rod 62 can be increased, and the disassembly and the replacement are convenient.

4. The structure of the protection device 7 in this embodiment is simple, stable and reliable, and the number of the protection devices 7 can be flexibly selected according to actual requirements. Wherein, all through bolt fixed connection between the preceding axle sleeve 73 of protector 7 and guide arm 72, between supporting shoe 75 and guide arm 72 and between back axle sleeve 74 and slide bar 71, this kind of bolted connection's structure both easy to assemble, convenient dismantlement again, when protector 7 produced deformation when receiving big impact force or great object collision and need change, can conveniently dismantle and install to improve maintenance speed, do not influence the job schedule.

The excavator bucket cylinder protection mechanism provided by the embodiment has the advantages of simple structure, stability, reliability, small weight increase and low cost.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.