High-strength oil cylinder outer cover lifting lug structure for dumper

Abstract

The high-strength oil cylinder outer cover lifting lug structure for the dumper comprises an oil cylinder body for the dumper and a plurality of half shells, the half shells are mutually spliced and combined to form an outer cover, the outer cover is arranged at one end of the oil cylinder body in a sleeved mode, connecting bases are installed on the end faces, away from the oil cylinder body, of the half shells, and the connecting bases are combined to form lifting lugs. Shaft holes are formed in the centers of the connecting bases correspondingly and are oppositely arranged, and neck bushes are inserted into the shaft holes. The oil cylinder is simple in structure, the lifting lug and the oil cylinder body are arranged in a split mode, the lifting lug and the oil cylinder body can be detached, the stability after installation is improved through the positioning ring, the limiting part and the inserting part, the neck bush is arranged in the shaft hole, abrasion to the connecting bases is offset through the neck bush, the connecting stability between the connecting bases is also improved through the neck bush, and the service life of the oil cylinder is prolonged. And the replacement rate of the lifting lug is reduced by replacing the neck bush.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a high-strength hydraulic cylinder cover lifting lug structure for dump trucks. Background Technology

[0002] The lifting cylinder (the cylinder that lifts the truck bed) of a dump truck is the core actuator of the hydraulic system, responsible for providing power to tilt the truck bed to complete unloading.

[0003] Currently, the hydraulic cylinder is connected to the fixed frame on the vehicle frame via a lifting lug. However, the lifting lug has a simple structure and is generally integrated with the hydraulic cylinder. After prolonged use, the lifting lug is prone to wear or breakage. In this case, the entire hydraulic cylinder must be replaced, resulting in increased costs and wasted materials. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks, wherein the lifting lug is separately set from the hydraulic cylinder body, which facilitates replacement, thereby solving the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: a high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks, including a hydraulic cylinder body for dump trucks and multiple half shells, the half shells are spliced ​​together to form an outer cover, the outer cover is fitted onto one end of the hydraulic cylinder body, a connecting seat is installed on the end face of the half shell away from the hydraulic cylinder body, the connecting seats are combined to form a lifting lug, the center of each connecting seat is provided with a shaft hole, the shaft holes are arranged opposite to each other, and an inner bushing is inserted into the shaft hole.

[0006] As a preferred technical solution, each of the inner surfaces of the half-shell is provided with an arc-shaped groove, and adjacent arc-shaped grooves are combined to form a positioning groove with an annular structure. Positioning rings are installed on the outer wall surface of the cylinder body at the positioning grooves, and the positioning rings are inserted into the positioning grooves. Multiple limiting grooves are provided on the end of the cylinder located inside the outer cover. Each of the inner surfaces of the half-shell protrudes at the limiting grooves to form a limiting part, and the limiting part is inserted into the limiting groove.

[0007] As a preferred technical solution, both sides of the half shell protrude to form connecting parts, and adjacent connecting parts are fitted together. Each connecting part is provided with multiple fixing holes, and a first bolt is inserted into each of the corresponding fixing holes. One end of each first bolt is threaded with a nut that presses the adjacent connecting parts and the half shell inward.

[0008] As a preferred technical solution, one half-shell and the connector are provided with multiple slots, and the other half-shell and the connector protrude from the slots to form insertion parts, which are inserted into the slots.

[0009] As a preferred technical solution, the side of the connector is provided with a countersunk hole that communicates with the shaft hole, and the outer ring surface of the inner bushing is provided with a screw hole opposite to the countersunk hole. The corresponding countersunk hole and screw hole are threaded with a second bolt to fix the inner bushing.

[0010] As a preferred technical solution, the inner diameter of the outer cover matches the diameter of the upper cylinder barrel of the hydraulic cylinder.

[0011] The beneficial effects of this utility model are: the utility model has a simple structure, the lifting lug is fixed to the cylinder body by the outer cover, so that the lifting lug and the cylinder body are set separately and can be disassembled. The stability after installation is increased by the positioning ring, the limiting part and the insertion part. The shaft hole is provided with an inner bushing, which offsets the wear of the connecting seat and increases the connection stability between the connecting seats. Furthermore, the replacement rate of the lifting lug is reduced by replacing the inner bushing. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a side view of the present invention;

[0015] Figure 3 This is a schematic diagram of the structure of this utility model after disassembling any half of the shell;

[0016] Figure 4 This is a schematic diagram of the structure of the outer cover of this utility model.

[0017] The components are as follows: 1. Cylinder body; 2. Half shell; 3. Connecting part; 4. First bolt; 5. Connecting seat; 6. Inner bushing; 7. Countersunk hole; 8. Second bolt; 9. Screw hole; 10. Positioning ring; 11. Slot; 12. Limiting groove; 13. Positioning groove; 14. Limiting part. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features for a similar purpose, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0021] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention discloses a high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks, comprising a hydraulic cylinder body 1 for dump trucks and multiple half-shells 2. The half-shells 2 are spliced ​​together to form an outer cover, which is fitted onto one end of the hydraulic cylinder body 1. A connecting seat 5 is installed on the end face of the half-shells 2 away from the hydraulic cylinder body 1. The connecting seats 5 are combined to form lifting lugs. Each connecting seat 5 has a shaft hole at its center, and the shaft holes are arranged opposite to each other. An inner bushing 6 is inserted into the shaft hole.

[0022] In this embodiment, the inner side of the half shell 2 is provided with an arc-shaped groove, and adjacent arc-shaped grooves are combined to form a positioning groove 13 with an annular structure. The outer wall of the cylinder body 1 is provided with a positioning ring 10 opposite to the positioning groove 13. The positioning ring 10 is inserted into the positioning groove 13. The end of the cylinder located inside the outer cover is provided with multiple limiting grooves 12. The inner side of the half shell 2 protrudes to form a limiting part 14 opposite to the limiting groove 12. The limiting part 14 is inserted into the limiting groove 12.

[0023] In this embodiment, both sides of the half shell 2 protrude to form connecting parts 3, and adjacent connecting parts 3 are fitted together. Each connecting part 3 is provided with multiple fixing holes, and a first bolt 4 is inserted into each of the opposite fixing holes. One end of each first bolt 4 is threaded with a nut that presses the adjacent connecting parts 3 and half shell 2 inward. The half shell can be fixed together by the cooperation between the first bolt and the nut, which also makes it easy to disassemble.

[0024] After removing the nut, the first bolt can be removed, and the half-shell can be opened outwards, allowing the half-shell and connecting seat to be removed from the cylinder body for independent replacement. This avoids replacing the cylinder body and reduces costs.

[0025] In this embodiment, a plurality of slots 11 are provided on one side of the half shell 2 and the connecting seat 5, and the other side of the half shell 2 and the connecting seat 5 protrude from the slots 11 to form insertion parts, which are inserted into the slots 11.

[0026] In this embodiment, the side of the connecting seat 5 is provided with a countersunk hole 7 that communicates with the shaft hole. The outer ring surface of the inner bushing 6 is provided with a screw hole 9 opposite to the countersunk hole 7. The countersunk hole 7 and the screw hole 9 are threaded with a second bolt 8 to fix the inner bushing 6. The end of the second bolt can be hidden through the countersunk hole, avoiding exposure and affecting the rotation of the connecting seat.

[0027] In this embodiment, the inner diameter of the outer cover matches the diameter of the upper cylinder barrel of the hydraulic cylinder, which increases the stability of the outer cover after it is installed with the hydraulic cylinder body.

[0028] During installation, the half-shells move inward from both sides and fit onto one end of the cylinder body. During this process, the positioning ring on the cylinder body can be inserted into the arc-shaped groove of the half-shell, while the limiting part on the half-shell can be inserted into the limiting groove of the cylinder body. The inserts on the half-shells and the connecting seats can be inserted into the corresponding slots. The positioning ring and positioning groove can vertically position the outer cover, while the limiting groove and limiting part can circumferentially position the outer cover, preventing rotation. The inserts and slots can precisely align the half-shells and the connecting seats, preventing misalignment and increasing stability.

[0029] After the above is completed, the first bolt is inserted through the fixing hole and the upper nut is rotated. The nut can press the connecting parts together, so that the outer cover can be firmly fixed to the cylinder body.

[0030] As the connecting seat approaches and is fixed, the inner bushing can be cooled with liquid nitrogen, reducing its diameter. It is then inserted into the shaft hole by tapping, allowing for an interference fit between the inner bushing and the shaft hole. The second bolt is then threaded into the screw hole of the inner bushing, preventing circumferential rotation of the inner bushing and increasing installation stability. The inner bushing also prevents wear on the connecting seat itself. When the inner bushing is severely worn, it can be removed and replaced to ensure continued performance.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks, characterized in that: It includes a cylinder body (1) for a dump truck and multiple half shells (2). The half shells (2) are spliced ​​together to form an outer cover. The outer cover is fitted onto one end of the cylinder body (1). A connecting seat (5) is installed on the end face of the half shell (2) away from the cylinder body (1). The connecting seats (5) are combined to form a lifting lug. A shaft hole is provided at the center of each connecting seat (5). The shaft holes are arranged opposite to each other. An inner bushing (6) is inserted into the shaft hole.

2. The high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks according to claim 1, characterized in that: The inner side of the half shell (2) is provided with an arc-shaped groove. Adjacent arc-shaped grooves are combined to form a positioning groove (13) with an annular structure. The outer wall of the cylinder body (1) is provided with a positioning ring (10) facing the positioning groove (13). The positioning ring (10) is inserted into the positioning groove (13). The cylinder is provided with multiple limiting grooves (12) at one end inside the outer cover. The inner side of the half shell (2) is provided with a limiting part (14) facing the limiting groove (12). The limiting part (14) is inserted into the limiting groove (12).

3. The high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks according to claim 1, characterized in that: Both sides of the half shell (2) protrude to form connecting parts (3), and adjacent connecting parts (3) are fitted together. Each connecting part (3) has multiple fixing holes, and a first bolt (4) is inserted into each of the corresponding fixing holes. One end of the first bolt (4) is threaded with a nut that presses the adjacent connecting parts (3) and half shell (2) inward.

4. The high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks according to claim 1, characterized in that: The half-shell (2) and the connecting seat (5) on one side are provided with multiple slots (11), and the half-shell (2) and the connecting seat (5) on the other side protrude from the slots (11) to form insertion parts, which are inserted into the slots (11).

5. The high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks according to claim 1, characterized in that: The side of the connecting seat (5) is provided with a countersunk hole (7) that communicates with the shaft hole. The outer ring surface of the inner bushing (6) is provided with a screw hole (9) opposite to the countersunk hole (7). The countersunk hole (7) and the screw hole (9) are threaded with a second bolt (8) to fix the inner bushing (6).

6. The high-strength hydraulic cylinder outer cover lifting lug structure for dump trucks according to claim 1, characterized in that: The inner diameter of the outer casing matches the diameter of the upper cylinder barrel of the hydraulic cylinder.

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