Folding oil cylinder for excavator

Abstract

The folding oil cylinder for the excavator comprises an oil cylinder body, the outer surface of the oil cylinder body is sleeved with a protective cover shell, the outer surface of the protective cover shell is in threaded connection with a threaded fixing rod, and a power line penetrates into the oil cylinder body through the protective cover shell. A connector body is fixedly connected to the surface of the left side of the oil cylinder body, a power line is fixedly connected to the lower surface of the connector body, a connecting block is fixedly connected to the outer surface of the oil cylinder body, a connecting column is slidably connected to the interior of the connecting block, and a gasket is in threaded connection to the outer surface of the connecting column. By means of the structure, the protection device, the protection cover shell, the connecting column and other structures are arranged, the oil cylinder body is covered with the protection cover shell, the fixing effect is achieved, when the piston rod part of the oil cylinder body descends to a proper position, the protection plate can stretch out and draw back along with the protection plate, and at the moment, the spring and the telescopic rod achieve the buffering effect; and damage caused by too high stretching speed is avoided.

Description

Technical Field

[0001] This utility model relates to the field of excavator cylinder technology, specifically a folding cylinder for excavators. Background Technology

[0002] Excavators are heavy machinery widely used in earthmoving, mining, and construction. Their core function is to excavate, load, and transport materials through the bucket, boom, and hydraulic system. Their core function relies on the hydraulically driven working device (such as the boom, stick, and bucket), combined with the slewing and traveling mechanisms, to achieve efficient and precise earthmoving operations.

[0003] Most hydraulic cylinders in current excavators lack a protection mechanism because the working environment of excavators is relatively harsh, with dust and debris such as gravel. When gravel and other debris fly, they can easily impact the hydraulic cylinder, causing the exposed piston rod to be easily scratched by sand and metal shavings, resulting in damage to the chrome plating and accelerating the wear of the seals. Utility Model Content

[0004] This utility model provides a folding hydraulic cylinder for excavators, which can protect the cylinder body with a protective cover and protective device to prevent the piston rod of the cylinder body from being scratched by sand, metal shavings and other debris. The sliding plate plays a telescopic role, providing a sliding space when the piston rod extends or retracts.

[0005] To achieve the above objectives, a folding hydraulic cylinder for excavators is provided, comprising a cylinder body, a protective cover housing fitted onto the outer surface of the cylinder body, two protective cover housings being provided, the left protective cover housing and the right protective cover housing being rotatably connected, a vent hole being provided on the outer surface of the protective cover housing, a filter screen being fixedly connected inside the vent hole, a connecting sleeve being fixedly connected to the lower surface of the protective cover housing, a protective device being provided on the outer surface of the protective cover housing, a threaded fixing rod being threadedly connected to the outer surface of the protective cover housing, a pull rod being threadedly connected to the outer surface of the threaded fixing rod, a power cable passing through the protective cover housing and into the interior of the cylinder body, a connector body being fixedly connected to the left side surface of the cylinder body, a power cable being fixedly connected to the lower surface of the connector body, a connecting block being fixedly connected to the outer surface of the cylinder body, a connecting post being slidably connected inside the connecting block, and a washer being threadedly connected to the outer surface of the connecting post.

[0006] According to the aforementioned folding hydraulic cylinder for excavators, the protective device includes a fixing block, a sliding groove, a telescopic rod, a spring, a connecting piece, a sliding plate, and a protective plate. The fixing block is fixedly connected to the outer surface of the protective cover housing. By setting the fixing block, the fixing block can fix the parts inside the protective device.

[0007] According to the aforementioned folding hydraulic cylinder for excavators, the sliding groove is formed inside the fixed block, and the telescopic rod is fixedly connected to the lower inner surface of the sliding groove. By setting the telescopic rod, the telescopic rod can achieve the effect of extension and retraction, allowing parts such as the sliding plate to slide within the fixed block.

[0008] According to the aforementioned folding hydraulic cylinder for excavators, the connecting piece is fixedly connected to the upper surface of the telescopic rod, and one end of the spring is fixedly connected to the lower inner surface of the sliding groove. By setting the connecting piece, the spring can push the connecting piece to slide, which facilitates pushing the protective plate.

[0009] According to the aforementioned folding hydraulic cylinder for excavators, the connecting piece is elastically connected to the lower inner surface of the sliding groove via springs. Multiple springs are provided, and through the elastic connection of the springs, the springs can use the sliding groove to push the connecting piece to drive the sliding plate to slide and extend, thereby playing a certain buffering role and preventing the protective plate from being violently impacted when it gets close.

[0010] According to the aforementioned folding hydraulic cylinder for excavators, the sliding plate is fixedly connected to the upper surface of the connecting piece, and the two side surfaces of the sliding plate are slidably connected to the inner surface of the fixed block. By setting the sliding plate, the sliding plate can slide in contact with the surface of the fixed block, thereby achieving a certain limiting effect and preventing the sliding plate from bending or shifting during sliding extension and retraction.

[0011] According to the aforementioned folding hydraulic cylinder for excavators, the protective plate is fixedly connected to the upper surface of the sliding plate, and the protective plate is slidably connected to the outer surface of the cylinder body. By setting the protective plate, the protective plate can block the piston rod part of the cylinder body, preventing sand, gravel, and metal debris from impacting the piston rod and the main body and causing damage.

[0012] According to the aforementioned folding hydraulic cylinder for excavators, two protective plates are provided, and the size of the connecting piece is the same as the size of the sliding groove. By ensuring that the size is the same, a limiting effect can be achieved, so that the position of the connecting piece will not shift when it slides and extends.

[0013] The beneficial effects of this utility model are as follows: By setting up a protective device, a protective cover housing, and a connecting column, the protective cover housing covers the cylinder body. The threaded fixing rod and the pull rod are used to fix the protective cover housing and the cylinder body, achieving a connection effect. Then, the connecting column is inserted into the right side of another connecting column through a connecting block and fitted with a washer to fix the two protective cover housings, achieving a fixing effect. When the piston rod part of the cylinder body descends to the appropriate position, the protective plate can extend and retract accordingly. At this time, the spring and the telescopic rod play a buffering effect, avoiding damage caused by excessive extension and retraction speed. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram of the overall structure of a folding hydraulic cylinder for an excavator according to the present invention;

[0016] Figure 2 This is a schematic diagram of the protective cover housing structure for a folding hydraulic cylinder used in an excavator according to the present invention;

[0017] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a cross-sectional view of a folding hydraulic cylinder for an excavator according to the present invention;

[0019] Figure 5 This is a schematic diagram of the threaded fixing rod structure of a folding hydraulic cylinder for an excavator according to the present invention;

[0020] Figure 6 This is a schematic diagram of the sliding plate structure of a folding hydraulic cylinder for an excavator according to the present invention;

[0021] Figure 7 This is a schematic diagram of the internal structure of a folding hydraulic cylinder for an excavator according to the present invention.

[0022] Legend:

[0023] 1. Cylinder body; 2. Protective cover housing; 3. Vent hole; 4. Connecting sleeve; 6. Connector body; 7. Threaded fixing rod; 8. Pull rod; 9. Connecting block; 10. Connecting column; 11. Washer; 12. Power cord; 13. Protective device; 1301. Fixing block; 1302. Sliding groove; 1303. Telescopic rod; 1304. Spring; 1305. Connecting piece; 1306. Sliding plate; 1307. Protective plate. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] Reference Figures 1 to 7This utility model discloses a folding hydraulic cylinder for an excavator, comprising a cylinder body 1, a protective cover shell 2 fitted onto the outer surface of the cylinder body 1, two protective cover shells 2 being rotatably connected, a left protective cover shell 2 and a right protective cover shell 2, a vent hole 3 being provided on the outer surface of the protective cover shell 2, a filter screen being fixedly connected inside the vent hole 3, a connecting sleeve 4 being fixedly connected to the lower surface of the protective cover shell 2, a protective device 13 being provided on the outer surface of the protective cover shell 2, a threaded fixing rod 7 being threadedly connected to the outer surface of the protective cover shell 2, a pull rod 8 being threadedly connected to the outer surface of the threaded fixing rod 7, a power cord 12 passing through the protective cover shell 2 and extending into the interior of the cylinder body 1, a connector body 6 being fixedly connected to the left surface of the cylinder body 1, a power cord 12 being fixedly connected to the lower surface of the connector body 6, a connecting block 9 being fixedly connected to the outer surface of the cylinder body 1, a connecting post 10 being slidably connected inside the connecting block 9, and a washer 11 being threadedly connected to the outer surface of the connecting post 10.

[0026] The connecting piece 1305 is fixedly connected to the upper surface of the telescopic rod 1303. One end of the spring 1304 is fixedly connected to the lower inner surface of the sliding groove 1302. The connecting piece 1305 is elastically connected to the lower inner surface of the sliding groove 1302 through the spring 1304. Multiple springs 1304 are provided. The sliding plate 1306 is fixedly connected to the upper surface of the connecting piece 1305. The two side surfaces of the sliding plate 1306 are slidably connected to the inner surface of the fixing block 1301. Through the connecting piece 1305, the spring 1304 can push... The movable connecting piece 1305 slides to facilitate pushing the protective plate 1307. It is elastically connected by a spring 1304. The spring 1304 can use the sliding groove 1302 to push the connecting piece 1305 to drive the sliding plate 1306 to slide and extend, which plays a certain buffering role and avoids violent impact when the protective plate 1307 gets close. Through the sliding plate 1306, the sliding plate 1306 can slide and contact the surface of the fixed block 1301, which plays a certain limiting role and prevents the sliding plate 1306 from bending and shifting during sliding and extending.

[0027] The protective plate 1307 is fixedly connected to the upper surface of the sliding plate 1306. The protective plate 1307 is slidably connected to the outer surface of the cylinder body 1. There are two protective plates 1307. The size of the connecting piece 1305 is the same as the size of the sliding groove 1302. Through the protective plate 1307, the protective plate 1307 can block the piston rod part of the cylinder body 1 to prevent sand, gravel and metal debris from hitting the piston rod and the main body and causing damage. By matching the size, it can play a limiting role, so that the position of the connecting piece 1305 will not shift when it slides.

[0028] The protective device 13 includes a fixed block 1301, a sliding groove 1302, a telescopic rod 1303, a spring 1304, a connecting piece 1305, a sliding plate 1306, and a protective plate 1307. The fixed block 1301 is fixedly connected to the outer surface of the protective cover housing 2. The sliding groove 1302 is opened inside the fixed block 1301. The telescopic rod 1303 is fixedly connected to the lower inner surface of the sliding groove 1302. The fixed block 1301 can fix the parts inside the protective device 13. The telescopic rod 1303 can extend and retract, allowing the sliding plate 1306 and other parts to slide within the fixed block 1301.

[0029] Working principle: After the protective cover housing 2 is fitted onto the outer surface of the cylinder body 1, the threaded fixing rod 7 is rotated and inserted into the inside of the cylinder body 1. The pull rod 8 is fitted onto the outer surface of the threaded fixing rod 7 to fix the cylinder body 1 and the protective cover housing 2. The connecting column 10 is inserted into the right side of another connecting block 9 through the connecting block 9. The washer 11 is fitted onto the outer surface of the connecting column 10 to fix the two protective cover housings 2. At this time, the power cord 12 will pass through the inside of the protective cover housing 2 to the outer surface of the protective cover housing 2. At this time, the vent hole 3 and the filter screen can play a role in ventilation. When the piston rod of the cylinder body 1 extends and retracts to the appropriate position, and an object approaches and touches the upper part of the protective plate 1307, the protective plate 1307 will extend and retract downward through the telescopic rod 1303. At this time, the multiple springs 1304 can play a buffering effect through elasticity to prevent the protective plate 1307 from directly colliding with the sliding plate 1306 and causing damage to the parts.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A folding ram for excavators, characterized in that, Including the oil cylinder body (1), the outer surface of the oil cylinder body (1) is sleeved with a protective cover housing (2), the protective cover housing (2) is provided with two, the left protective cover housing (2) is rotatably connected with the right protective cover housing (2), the outer surface of the protective cover housing (2) is provided with a breathable hole (3), the inside of the breathable hole (3) is fixedly connected with a filter screen, the lower surface of the protective cover housing (2) is fixedly connected with a connecting sleeve (4), the outer surface of the protective cover housing (2) is provided with a protection device (13), the outer surface of the protective cover housing (2) is threadedly connected with a threaded fixing rod (7), the outer surface of the threaded fixing rod (7) is threadedly connected with a pull rod (8), the left surface of the oil cylinder body (1) is fixedly connected with a connector body (6), the lower surface of the connector body (6) is fixedly connected with a power line (12), the power line (12) penetrates through the protective cover housing (2) to the inside of the oil cylinder body (1), the outer surface of the oil cylinder body (1) is fixedly connected with a connecting block (9), the inside of the connecting block (9) is slidably connected with a connecting column (10), the outer surface of the connecting column (10) is threadedly connected with a washer (11).

2. The folding ram as claimed in claim 1, wherein The protection device (13) comprises a fixed block (1301), a sliding groove (1302), a telescopic rod (1303), a spring (1304), a connecting piece (1305), a sliding plate (1306) and a protection plate (1307), and the fixed block (1301) is fixedly connected to the outer surface of the protective cover housing (2).

3. The folding ram as claimed in claim 2, wherein The sliding groove (1302) is formed in the inside of the fixed block (1301), and the telescopic rod (1303) is fixedly connected to the inside lower surface of the sliding groove (1302).

4. The folding ram as claimed in claim 3, wherein The connecting piece (1305) is fixedly connected to the upper surface of the telescopic rod (1303), and one end of the spring (1304) is fixedly connected to the inside lower surface of the sliding groove (1302).

5. The folding ram as claimed in claim 4, wherein The connecting piece (1305) is elastically connected to the inside lower surface of the sliding groove (1302) through the spring (1304), and the spring (1304) is provided with a plurality of.

6. The folding ram as claimed in claim 5, wherein The sliding plate (1306) is fixedly connected to the upper surface of the connecting piece (1305), and the two side surfaces of the sliding plate (1306) are slidably connected to the inside surface of the fixed block (1301).

7. The folding ram as claimed in claim 6, wherein The protection plate (1307) is fixedly connected to the upper surface of the sliding plate (1306), and the protection plate (1307) is slidably connected to the outer surface of the oil cylinder body (1).

8. The folding ram as claimed in claim 7, wherein The protection plate (1307) is provided with two, and the size of the connecting piece (1305) is consistent with the size of the sliding groove (1302).

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