A protection mechanism for an excavator bucket oil cylinder

Abstract

The application relates to the technical field of excavator structures, and provides an excavator bucket oil cylinder protection mechanism, which comprises an oil cylinder, a small arm, a fixed rear wing, a protective cover, a buffer pad, a limiting sheet and a No.1 connecting rod, one end of the oil cylinder is rotationally connected with the fixed rear wing, the bottom of the fixed rear wing is fixedly connected with the small arm, the protective cover is slidably connected to the outer wall of the oil cylinder, one end of the No.1 connecting rod is slidably connected to the two sides of the small arm, and the limiting sheet is arranged on one side of the protective cover; the protective cover slides by the elongation of the oil cylinder, so that the internal components clean the piston part 11, the bottom structure of the protective cover is used for cleaning and resetting, and the limiting block and the buffer pad are used for protection, so that the problem that various dirt and dust enter the oil cylinder from the piston during the operation of the bucket oil cylinder and damage the oil cylinder is solved.

Description

A protective mechanism for excavator bucket cylinder Technical Field

[0001] This invention relates to the field of excavator structure technology, specifically to a protective mechanism for the excavator bucket cylinder. Background Technology

[0002] A bucket is a shovel that is installed on an excavator. It is also called a digging bucket. According to the working method, it is divided into backhoe buckets and front shovel buckets. The backhoe bucket is more commonly used. During the use of an excavator, the important component that raises and lowers the bucket is the bucket cylinder. Without the bucket cylinder, the excavator cannot perform digging work.

[0003] The Chinese announcement number is CN113565159A, which discloses a protective mechanism for an excavator bucket cylinder. The mechanism comprises a boom, a bucket, and a bucket cylinder. It further includes a front support frame, a rear support frame, a rocker arm, a connecting rod, and a protective device. The front support frame has a triangular structure, with a lug plate on the bucket. The first end of the front support frame is hinged to the lug plate via a first rotating shaft. The second end of the front support frame is hinged to one end of the rocker arm via a second rotating shaft, and the other end of the rocker arm is hinged to the boom. Both ends of the connecting rod are hinged to the first and second rotating shafts, respectively. The front end of the bucket cylinder is hinged to the second rotating shaft, and the rear end of the bucket cylinder is hinged to the boom. The third end of the front support frame is hinged to the front end of the protective device via a third rotating shaft. The rear support frame is fixed to the rear end of the boom, and the rear end of the protective device is hinged to the rear support frame via a fourth rotating shaft. The protective device is located above the bucket cylinder and spaced apart from it. The protective device is retractable. Although the above solution uses multiple linkages to achieve a retractable protective device, it does not take into account the problem that dirt and dust can enter the cylinder through the piston during operation and cause damage.

[0004] In summary, the present invention provides a protective mechanism for the hydraulic cylinder of an excavator bucket to solve the above-mentioned problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a protective mechanism for excavator bucket cylinders, which solves the problem in the prior art where dirt and dust enter the cylinder through the piston during operation, causing damage.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A protective mechanism for the hydraulic cylinder of an excavator bucket, comprising:

[0008] A hydraulic cylinder, one end of which is rotatably connected to a fixed rear wing, and a small arm is fixedly connected to the bottom of the fixed rear wing, preferably by welding.

[0009] A protective cover is slidably connected to the outer wall of the oil cylinder. A buffer pad is fixedly connected to one end of the protective cover, preferably by a snap-fit ​​connection. A limit plate is provided on one side of the buffer pad. A second connecting rod is rotatably connected to one side of the protective cover. A sliding plate is provided inside the protective cover on one side of the limit plate. A brush or dust-blocking tool can be installed on the sliding plate. A fixing block is provided inside the protective cover. The outer wall of the fixing block is tightly attached to the inner wall of the protective cover. The protective cover is preferably made of a metal with high hardness.

[0010] Link 1 has one end slidably connected to both sides of the forearm. Link 3 is rotatably connected to the outer wall of the middle part of Link 1. A crossbar is fixedly connected to the inner side of the middle part of Link 3. A telescopic rod is rotatably connected to the middle part of the crossbar. A sliding block is slidably connected to the end of the telescopic rod near the crossbar. A spring is sleeved on the outer side of the telescopic rod.

[0011] Preferably, one end of the hydraulic cylinder is rotatably connected to the inner side of the No. 1 connecting rod on both sides.

[0012] Preferably, the top of the forearm has a square groove, and the telescopic rod is rotatably connected to the inner walls of the square groove on both sides.

[0013] Preferably, one end of the third connecting rod is rotatably connected to one end of the second connecting rod.

[0014] Preferably, the sliding block is fixedly connected to the bottom of the protective cover by a column, and the fixed connection is preferably welded.

[0015] Preferably, the limiting piece is fixedly connected to one end near the first connecting rod.

[0016] Preferably, the hydraulic cylinder consists of a piston part and a hydraulic cylinder part, with a small portion of the protective cover fitted onto the piston part and the majority of it fitted onto the hydraulic cylinder part.

[0017] Preferably, the protective cover is fitted onto the inner wall of the piston portion and fixedly connected to multiple slide rail blocks. The sliding plate is slidably connected to the slide rail blocks, and the fixing block is located on the side of the slide rail block away from the buffer pad, and the fixing block is in close contact with one side of the multiple slide rail blocks.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This invention extends the piston in the hydraulic cylinder, causing the first connecting rod to rotate counterclockwise and pull on the third connecting rod. Simultaneously, the third connecting rod drives the second connecting rod to rotate, pulling the protective cover to slide. As the protective cover slides, the sliding plate slides on the outer wall of the piston. When the bucket lifts the material, some dust is generated. During the material unloading process, the piston retracts, and the sliding plate also slides on the piston. Using a dust removal tool to clean the dust on the piston surface solves the problem of dirt and dust entering the hydraulic cylinder through the piston during operation, causing damage. Attached Figure Description

[0020] Figure 1 is a perspective view of the excavator bucket cylinder protection device of the present invention.

[0021] Figure 2 is a cross-sectional view of the excavator bucket cylinder protection device of the present invention;

[0022] Figure 3 is a perspective view of the sliding structure of the excavator bucket cylinder protection device of the present invention.

[0023] Figure 4 is a perspective view of the protective sleeve of the present invention;

[0024] Figure 5 is a cross-sectional perspective view of the protective sleeve of the present invention;

[0025] Figure 6 is a perspective view of the hydraulic cylinder of the present invention;

[0026] In the picture:

[0027] 1. Hydraulic cylinder; 2. Forearm; 3. Fixed rear wing;

[0028] 4. Protective cover; 41. Buffer pad; 42. Limiting plate; 43. Second connecting rod; 44. Sliding plate; 45. Slide rail block; 46. Fixing block;

[0029] 5. Link 1; 51. Link 3; 52. Sliding block; 53. Telescopic rod; 54. Spring; 55. Crossbar;

[0030] 11. Piston section; 12. Hydraulic cylinder section. Detailed Implementation

[0031] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0032] This invention provides a protective mechanism for the hydraulic cylinder of an excavator bucket, comprising:

[0033] Hydraulic cylinder 1, one end of which is rotatably connected to a fixed rear wing 3, and a forearm 2 is fixedly connected to the bottom of the fixed rear wing 3;

[0034] The protective cover 4 is slidably connected to the outer wall of the oil cylinder 1. A buffer pad 41 is fixedly connected to one end of the protective cover 4. A limit piece 42 is provided on one side of the buffer pad 41. A second connecting rod 43 is rotatably connected to one side of the protective cover 4. A sliding piece 44 is provided inside the protective cover 4 on one side of the limit piece 42. A fixing block 46 is provided inside the protective cover 4. The outer wall of the fixing block 46 is in close contact with the inner wall of the protective cover 4. When the protective cover 4 slides toward the limit piece 42, it drives the sliding piece 44 to move. At the same time, the fixing block 46, which is in close contact with the slide rail block 45, is no longer in close contact with the slide rail block 45 and leaves a notch in the middle.

[0035] Link 5 is a first link. One end of the first link is slidably connected to both sides of the forearm 2. Link 51 is rotatably connected to the outer wall of the middle part of the first link 5. A crossbar 55 is fixedly connected to the inner side of the middle part of the third link 51. A telescopic rod 53 is rotatably connected to the middle part of the crossbar 55. A sliding block 52 is slidably connected to the end of the telescopic rod 53 near the crossbar 55. A spring 54 is sleeved on the outer side of the telescopic rod 53. When the protective cover 4 slides, it drives the sliding block at the bottom to slide along the telescopic rod 53. At the same time, the third link 51 and the second link 43 rotate and open.

[0036] As one embodiment of the present invention: the two sides of one end of the oil cylinder 1 are rotatably connected to the inner side of the No. 5 connecting rod, and when the No. 5 rotating, it drives the piston part 11 in the oil cylinder 1 to extend.

[0037] As one embodiment of the present invention: a square groove is provided at the top of the forearm 2, and the telescopic rod 53 is rotatably connected to the inner walls of the square groove on both sides. The piston part 11 in the oil cylinder 1 will extend and rotate slightly downward, and at the same time drive the telescopic rod 53 to rotate slightly downward.

[0038] As one embodiment of the present invention: one end of the third connecting rod 51 is rotatably connected to one end of the second connecting rod 43, and the second connecting rod 43 and the third connecting rod 51 are simultaneously rotated during the sliding of the protective cover 4;

[0039] In one embodiment of the present invention: the sliding block 52 is fixedly connected to the bottom of the protective cover 4 by a column, and the sliding block 52 can slide on the telescopic rod 53 while the protective cover 4 slides.

[0040] As one embodiment of the present invention: the limiting piece 42 is fixedly connected to one end near the first connecting rod 5. The main function of the limiting piece 42 is to limit the oil cylinder 1. If the oil cylinder 1 is stretched too long for a long time, the sealing ring will break, causing the oil cylinder 1 to extend and retract slowly or even stop.

[0041] As one embodiment of the present invention: the oil cylinder 1 is composed of a piston part 11 and an oil cylinder part. A small part of the protective cover 4 is fitted onto the piston part 11 and a large part is fitted onto the oil cylinder part. The main function of the protective cover 4 is to block and clean dust and protect the connection position between the piston part 11 and the oil cylinder part.

[0042] In one embodiment of the present invention: the protective cover 4 is fitted onto the inner wall of the piston part 11 and a plurality of slide rail blocks 45 are fixedly connected thereto. The sliding plate 44 is slidably connected to the slide rail block 45. The fixing block 46 is disposed on the side of the slide rail block 45 away from the buffer pad 41, and the fixing block 46 is in close contact with one side of the plurality of slide rail blocks 45. During the sliding process of the protective cover 4, the sliding plate 44 also slides on the slide rail block 45 to clean dust. The fixing block 46, which is in close contact with one side of the slide rail block 45, is no longer in close contact with the slide rail block 45, but is subjected to the opposite force and pushes against the oil cylinder part and slides on the inner wall of the protective cover 4.

[0043] Specific working principle:

[0044] As shown in Figure 1, when the excavator is started and the operator operates the excavator bucket to dig downwards, the piston part 11 in the hydraulic cylinder 1 extends. Then, the first connecting rod 5 rotates counterclockwise to generate a pulling force on the third connecting rod 51. At the same time, the third connecting rod 51 drives the second connecting rod 43 to rotate and pull the protective cover 4 to slide. Under the sliding of the protective cover 4, the sliding plate 44 slides on the outer wall of the piston part 11. Then, when the bucket lifts the material, some dust will be generated. Similarly, dust will be generated when the material is lowered. During the process of lowering the material, the piston part 11 contracts, and the sliding plate 44 also slides on the piston part 11. Use a dust removal tool to clean the dust on the surface of the piston part 11.

[0045] As shown in Figure 3, in dusty conditions, the excavator can be started without operating the bucket. After the boom 2 is powered on, the telescopic rod 53 extends, and at the same time, the sliding block 52 and the protective cover 4 slide towards the limiting plate 3. The fixing block 46, which is close to the side of the slide rail block 45, is no longer close to the slide rail block 45, but is subjected to the opposite force and pushes against the cylinder part and slides on the inner wall of the protective cover 4. Then, a gap is left between the slide rail block 45 and the fixing block 46. Then, the sliding plate 44 slides towards the fixing block 46 to the gap position, and then slides towards the buffer pad 41. This process is repeated, causing the dust to be swept towards the buffer pad 41.

[0046] As shown in Figure 5, when the excavator needs to be reset before it is turned off, the telescopic rod 53 retracts and drives the third connecting rod 43 to rotate counterclockwise. At the same time, the protective cover 4 and the sliding block 52 slide towards the fixed rear wing 3. Simultaneously, due to the obstruction of the hydraulic cylinder, the fixed locking block 46 is pushed towards the slide rail block 45 until the fixed locking block 46 is in close contact with the side of the slide rail block 45, thus completing the reset.

[0047] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A protective mechanism for the hydraulic cylinder of an excavator bucket, characterized in that, include: A hydraulic cylinder (1) has a fixed rear wing (3) rotatably connected to one end of the hydraulic cylinder (1), and a forearm (2) is fixedly connected to the bottom of the fixed rear wing (3); a protective cover (4) is slidably connected to the outer wall of the hydraulic cylinder (1), and a buffer pad (41) is fixedly connected to one end of the protective cover (4). A limit piece (42) is provided on one side of the buffer pad (41) of the protective cover (4), and a second connecting rod (43) is rotatably connected to one side of the protective cover (4). A sliding piece (44) is provided inside the protective cover (4) on one side of the limit piece (42), and the interior of the protective cover (4) is... A fixing block (46) is provided, the outer wall of which is in close contact with the inner wall of the protective cover (4); a first connecting rod (5), one end of which is slidably connected to both sides of the forearm (2), a third connecting rod (51) is rotatably connected to the outer wall of the middle part of the first connecting rod (5), a crossbar (55) is fixedly connected to the inner side of the middle part of the third connecting rod (51), a telescopic rod (53) is rotatably connected to the middle part of the crossbar (55), a sliding block (52) is slidably connected to the end of the telescopic rod (53) near the crossbar (55), and a spring (54) is sleeved on the outer side of the telescopic rod (53).

2. The excavator bucket cylinder protection mechanism as described in claim 1, characterized in that: The cylinder (1) is rotatably connected to the inside of the first connecting rod (5) on both sides at one end.

3. The excavator bucket cylinder protection mechanism as described in claim 1, characterized in that: The forearm (2) has a square groove at the top, and the telescopic rod (53) is rotatably connected to the inner walls of the square groove on both sides.

4. The excavator bucket cylinder protection mechanism as described in claim 1, characterized in that: One end of the third connecting rod (51) is rotatably connected to one end of the second connecting rod (43).

5. The excavator bucket cylinder protection mechanism as described in claim 1, characterized in that: The sliding block (52) is fixedly connected to the bottom of the protective cover (4) by a column.

6. The excavator bucket cylinder protection mechanism as described in claim 1, characterized in that: The limiting piece (42) is fixedly connected to one end near the first connecting rod (5).

7. The excavator bucket cylinder protection mechanism as described in claim 1, characterized in that: The cylinder (1) consists of a piston part (11) and a cylinder part (12). A portion of the protective cover (4) is fitted onto the piston part (11), and a portion of the protective cover (4) is fitted onto the cylinder part (12).

8. The excavator bucket cylinder protection mechanism as described in claim 7, characterized in that: The protective cover (4) is fitted onto the inner wall of the piston part (11) and fixedly connected to multiple slide blocks (45). The sliding piece (44) is slidably connected to the slide block (45). The fixing block (46) is located on the side of the slide block (45) away from the buffer pad (41), and the fixing block (46) is in close contact with one side of the multiple slide blocks (45).

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