Hydraulic lifting oil cylinder for dumper

Abstract

The utility model discloses a hydraulic lifting oil cylinder for a dumper, and belongs to the technical field of hydraulic oil cylinder devices. The hydraulic cylinder mainly comprises a cylinder body and a piston rod, the piston rod is installed in the cylinder body, and a cleaning assembly used for cleaning the outer wall of the piston rod is arranged at the upper end of the cylinder body. According to the hydraulic lifting oil cylinder for the dumper, through the arranged cleaning frame and cleaning cotton, the hydraulic lifting oil cylinder can be tightly attached to the outer wall of the piston rod, dust and impurities on the surface of the piston rod are effectively removed, the impurities are prevented from entering the cylinder body, and therefore the service life of the oil cylinder is prolonged; the cleaning frame and the positioning plate are fixed through a combined structure of the T-shaped groove, the strip-shaped groove and the fastening bolt, so that the cleaning assembly can be kept stable even under the environment that the dumper vibrates and impacts frequently, the lasting and reliable cleaning effect is ensured, and compared with a traditional two-way screw structure, the design can better resist vibration and impact, and the cleaning frame is prevented from loosening.

Description

Technical Field

[0001] This application relates to the field of hydraulic cylinder device technology, specifically a hydraulic lifting cylinder for dump trucks. Background Technology

[0002] In the field of hydraulic cylinder technology, the performance and reliability of the hydraulic lifting cylinders of dump trucks, as important engineering transport vehicles, are crucial. Dump trucks typically operate in complex and harsh conditions, such as construction sites and mines, where there are large amounts of dust, mud, and other impurities. During the operation of dump trucks, this dust inevitably settles on the piston rod of the cylinder. As a key moving component of the hydraulic lifting cylinder, the surface cleanliness of the piston rod directly affects the service life and working performance of the cylinder. When dust adheres to the piston rod surface, it may enter the cylinder body during the reciprocating motion of the cylinder. Dust will exacerbate the friction and wear between the piston rod and internal components such as seals and guide sleeves, leading to premature seal failure, oil leakage, and affecting the normal operating pressure and lifting capacity of the cylinder.

[0003] Some existing hydraulic lifting cylinders use a cleaning cotton pad on the outside of the piston rod to clean the dust on the piston rod surface. However, most of these cleaning cotton pad fixing mechanisms use a double-ended screw to drive two clamping plates to clamp and fix the cleaning cotton pad. During the operation of a dump truck, the hydraulic lifting cylinder is subjected to frequent vibration and impact. When vibration and impact act on the double-ended screw structure, the screw is prone to loosening. Once the screw is loose, the clamping force of the clamping plates on the cleaning cotton pad will weaken, causing the cleaning cotton pad to loosen. After the cleaning cotton pad is loose, its adhesion to the piston rod surface decreases, the cleaning effect is greatly reduced, and it cannot effectively remove dust from the piston rod surface, greatly reducing the practicality and reliability of the hydraulic lifting cylinder.

[0004] Therefore, it is necessary to provide a hydraulic lifting cylinder for dump trucks to solve the above problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] Based on the aforementioned problems in the prior art, the problem to be solved by this application is to provide a hydraulic lifting cylinder for dump trucks, which solves the problem that the cleaning cotton fixing mechanism in the prior art is prone to loosening under vibration and impact, resulting in a decrease in cleaning effect.

[0007] The technical solution adopted by this application to solve its technical problem is: a hydraulic lifting cylinder for a dump truck, including a cylinder body and a piston rod, wherein the piston rod is installed inside the cylinder body, and a cleaning component for cleaning the outer wall of the piston rod is provided at the upper end of the cylinder body;

[0008] The cleaning assembly includes a first clamping plate and a second clamping plate installed on the upper end of the cylinder. A positioning plate is fixed to the inner side of both the first clamping plate and the second clamping plate. A cleaning frame is provided on the inner side of the two positioning plates. A limiting mechanism for fixing the cleaning frame is provided on both the two cleaning frames and the two positioning plates. An arc-shaped plate is provided inside the two cleaning frames. A cleaning cotton is fixed to one side of the two arc-shaped plates. A circular channel for cleaning the outer wall of the piston rod is formed between the two cleaning cottons. An arc-shaped groove is opened on one side of the cleaning frame, and the arc-shaped plate is installed in the arc-shaped groove.

[0009] Furthermore, the limiting mechanism includes multiple fastening bolts, and multiple threaded holes are provided on both positioning plates and both cleaning frames. When the threaded holes on the two positioning plates are aligned with the threaded holes on the two cleaning frames, they can be fixedly connected by the multiple fastening bolts respectively.

[0010] Furthermore, T-shaped grooves are provided on both sides of the interior of the two positioning plates, and a strip groove is provided at one end of the interior of the two positioning plates. The T-shaped block is slidably installed inside the T-shaped groove.

[0011] Furthermore, T-shaped blocks are fixed to both sides of the outer walls of the two cleaning frames, and strip blocks are fixed to one end of the outer walls of the two cleaning frames, with the strip blocks installed inside the strip grooves.

[0012] Furthermore, a first rubber pad is fixed to one side of the first clamping plate, and a second rubber pad is fixed to one side of the second clamping plate. The inner sides of the first rubber pad and the second rubber pad are tightly fitted to the outer wall of the cylinder.

[0013] Furthermore, mounting plates are fixed to both sides of the first clamping plate and the second clamping plate, and the multiple mounting plates are respectively attached to each other and then fixedly connected by bolts.

[0014] Furthermore, multiple pull rings are fixed to the upper end of both cleaning frames.

[0015] The beneficial effects of this application are as follows: The hydraulic lifting cylinder for dump trucks provided by this application can closely fit the outer wall of the piston rod through the setting of the cleaning frame and cleaning cotton, effectively removing dust and impurities from the surface of the piston rod, preventing impurities from entering the cylinder body, thereby extending the service life of the cylinder. The cleaning frame is fixed to the positioning plate through a combination structure of T-slots, strip slots and fastening bolts, so that the cleaning component can remain stable even in the environment of frequent vibration and impact of dump trucks, ensuring the long-lasting and reliable cleaning effect. Compared with the traditional bidirectional screw structure, this design is more resistant to vibration and impact and prevents the cleaning frame from loosening.

[0016] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is an overall schematic diagram of a hydraulic lifting cylinder for a dump truck according to this application;

[0019] Figure 2 This is an exploded schematic diagram of the first and second clamping plates of a hydraulic lifting cylinder for a dump truck according to this application.

[0020] Figure 3 This is a left-side exploded view of the first and second clamping plates of a hydraulic lifting cylinder for a dump truck according to this application.

[0021] Figure 4 This is an exploded schematic diagram of the first clamping plate of a hydraulic lifting cylinder for a dump truck according to this application;

[0022] Figure 5 This is a bottom-view exploded view of the first clamping plate of a hydraulic lifting cylinder for a dump truck according to this application;

[0023] Figure 6 This is a schematic diagram of the installation of a cleaning cotton for a hydraulic lifting cylinder used in a dump truck according to this application;

[0024] The following are the labeling elements in the figure:

[0025] 1. Cylinder block; 2. Piston rod; 3. First clamping plate; 4. Second clamping plate; 5. Positioning plate; 6. Cleaning frame; 7. Arc plate; 8. Cleaning cotton; 9. T-slot; 10. Strip groove; 11. T-block; 12. Strip block; 13. Arc groove; 14. Pull ring; 15. Fastening bolt; 16. Second rubber pad; 17. First rubber pad; 18. Mounting plate. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0028] like Figure 1-6 As shown, this application provides a hydraulic lifting cylinder for a dump truck, including a cylinder body 1 and a piston rod 2. The piston rod 2 can reciprocate along the axial direction of the cylinder body 1, extending or retracting into the cylinder body 1 to achieve the lifting action of the dump truck. A cleaning component is provided at the upper end of the cylinder body 1 to remove dust, mud, and other impurities adhering to the outer wall of the piston rod 2, preventing impurities from entering the cylinder body 1 and causing component wear and oil leakage problems.

[0029] The cleaning assembly includes a symmetrically arranged first clamping plate 3 and a second clamping plate 4, both of which are bolted to the outer upper end of the cylinder 1. Positioning plates 5 are fixed to the inner sides of the first clamping plate 3 and the second clamping plate 4, respectively. The positioning plates 5 have a semi-circular structure, and their inner surfaces are fixedly connected to the cleaning frame 6. A first rubber pad 17 is fixed to the side of the first clamping plate 3 that contacts the cylinder 1, and a second rubber pad 16 is fixed to the corresponding position on the second clamping plate 4. The rubber pads are fixed with glue or screws, and their inner surfaces are designed to match the curvature of the outer wall of the cylinder 1, ensuring a tight fit and providing shock absorption and sealing, thus making the connection between them and the cylinder 1 more secure.

[0030] A cleaning frame 6 is provided on the inner side of each of the two positioning plates 5. The cleaning frame 6 is a semi-cylindrical frame. An arc plate 7 is provided inside each of the two cleaning frames 6. The arc of the arc plate 7 is consistent with the arc of the outer wall of the piston rod 2. A cleaning cotton 8 is fixedly installed on one side of the arc plate 7.

[0031] An arc-shaped groove 13 is provided on one side of the cleaning frame 6. An arc-shaped plate 7 is embedded in the arc-shaped groove 13. The limiting effect of the arc-shaped groove 13 ensures that the arc-shaped plate 7 is stably installed, so that the cleaning cotton 8 on both sides fits tightly against the outer wall of the piston rod 2.

[0032] The cleaning frame 6 and the positioning plate 5 are fixedly connected by a limiting mechanism. T-shaped grooves 9 are provided on both sides inside the positioning plate 5. T-shaped blocks 11 matching the T-shaped grooves 9 are fixed on both sides of the outer wall of the cleaning frame 6. The T-shaped blocks 11 can slide along the T-shaped grooves 9 to achieve the initial positioning of the cleaning frame 6.

[0033] A strip groove 10 is provided at one end of the positioning plate 5. A strip block 12 is fixed at the corresponding position on the outer wall of the cleaning frame 6. The strip block 12 is embedded in the strip groove 10, which further restricts the movement direction of the cleaning frame 6 and ensures its stable installation.

[0034] Meanwhile, both the positioning plate 5 and the cleaning frame 6 have multiple threaded holes. When the T-shaped block 11 and the strip block 12 are fully embedded in their corresponding slots, their threaded holes align. By passing the fastening bolts 15 through the threaded holes and tightening them, the cleaning frame 6 and the positioning plate 5 are rigidly fixed. This structure, through the dual action of mechanical limiting and bolt tightening, is more resistant to vibration and impact than the traditional bidirectional screw structure, preventing the cleaning frame 6 from loosening.

[0035] After the two cleaning frames 6 are fixed by the limiting mechanism, the cleaning cotton 8 on both sides are spliced ​​to form a complete circular channel. The piston rod 2 passes through this channel. During the reciprocating motion of the piston rod 2, the cleaning cotton 8 rubs against the surface of the piston rod 2 to remove the attached impurities.

[0036] Mounting plates 18 are fixed to both sides of the first clamping plate 3 and the second clamping plate 4. The mounting plates 18 are rectangular plates with bolt holes. When the first clamping plate 3 and the second clamping plate 4 are closed on the outside of the cylinder body 1, the mounting plates 18 on both sides fit together. Bolts are passed through the bolt holes and tightened to achieve a fixed connection between the clamping plates and the cylinder body 1. This structure is easy to assemble and disassemble, and the bolts are evenly distributed, ensuring stable stress distribution.

[0037] Multiple pull rings 14 are fixed to the upper end of each of the two cleaning frames 6. The pull rings 14 are fixed to the cleaning frame 6 by welding. When it is necessary to replace the cleaning cotton 8, the operator can pull the cleaning frame 6 upward through the pull rings 14 to disengage the T-shaped block 11 and the strip block 12 from the corresponding groove, so as to quickly disassemble the cleaning frame 6 and improve the convenience of maintenance.

[0038] Working principle: When the hydraulic lifting cylinder of the dump truck is working, the piston rod 2 extends or retracts from the cylinder body 1 under the action of hydraulic oil. During this process, dust, mud, and other impurities attached to the surface of the piston rod 2 move through the circular channel of the cleaning component.

[0039] The cleaning cotton 8 is closely attached to the outer wall of the piston rod 2, and removes impurities through friction. The impurities are intercepted on the surface of the cleaning cotton 8 and prevented from entering the cylinder 1.

[0040] The cleaning frame 6 is fixed by a combination structure of T-slot 9, strip groove 10 and fastening bolt 15. Even if the oil cylinder is subjected to frequent vibration and impact, the cleaning frame 6 and cleaning cotton 8 can be kept stable, ensuring a long-lasting and reliable cleaning effect.

[0041] When the cleaning cotton 8 needs to be replaced after a period of use, simply loosen the bolts of the mounting plate 18 and the limiting mechanism, and remove the cleaning frame 6 through the pull ring 14 to quickly replace the arc plate 7 and the cleaning cotton 8. No excessive operation steps are required, reducing maintenance costs and time.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A hydraulic lifting cylinder for a dump truck, characterized in that: It includes a cylinder (1) and a piston rod (2), the piston rod (2) being installed inside the cylinder (1), and a cleaning assembly for cleaning the outer wall of the piston rod (2) being provided at the upper end of the cylinder (1); The cleaning assembly includes a first clamping plate (3) and a second clamping plate (4) installed on the upper end of the cylinder (1). The inner sides of the first clamping plate (3) and the second clamping plate (4) are fixed with positioning plates (5). The inner sides of the two positioning plates (5) are provided with cleaning frames (6). The two cleaning frames (6) and the two positioning plates (5) are provided with limiting mechanisms for fixing the cleaning frames (6). The interior of the two cleaning frames (6) is provided with arc plates (7). Cleaning cotton (8) is fixed on one side of the two arc plates (7). A circular channel for cleaning the outer wall of the piston rod (2) is formed between the two cleaning cotton (8). An arc groove (13) is opened on one side of the cleaning frame (6). The arc plate (7) is installed in the arc groove (13).

2. A hydraulic lifting cylinder for a dump truck according to claim 1, characterized in that: The limiting mechanism includes multiple fastening bolts (15). Multiple threaded holes are provided on both of the two positioning plates (5) and the two cleaning frames (6). When the threaded holes on the two positioning plates (5) and the threaded holes on the two cleaning frames (6) are aligned respectively, they can be fixedly connected by the multiple fastening bolts (15).

3. A hydraulic lifting cylinder for a dump truck according to claim 2, characterized in that: Both sides of the two positioning plates (5) are provided with T-shaped grooves (9), and one end of the two positioning plates (5) is provided with a strip groove (10). The T-shaped block (11) is slidably installed inside the T-shaped groove (9).

4. A hydraulic lifting cylinder for a dump truck according to claim 3, characterized in that: T-shaped blocks (11) are fixed on both sides of the outer wall of the two cleaning frames (6), and strip blocks (12) are fixed on one end of the outer wall of the two cleaning frames (6). The strip blocks (12) are installed inside the strip groove (10).

5. A hydraulic lifting cylinder for a dump truck according to claim 1, characterized in that: A first rubber pad (17) is fixed on one side of the first clamping plate (3), and a second rubber pad (16) is fixed on one side of the second clamping plate (4). The inner sides of the first rubber pad (17) and the second rubber pad (16) are tightly fitted to the outer wall of the cylinder (1).

6. A hydraulic lifting cylinder for a dump truck according to claim 1, characterized in that: Mounting plates (18) are fixed on both sides of the first clamping plate (3) and the second clamping plate (4). The mounting plates (18) are respectively attached to each other and then fixedly connected by bolts.

7. A hydraulic lifting cylinder for a dump truck according to claim 1, characterized in that: Multiple pull rings (14) are fixed to the upper ends of both cleaning frames (6).

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