Crane supporting leg protection device

By designing a crane outrigger protection device with a mud scraping mechanism and a protective mechanism, stones and mud under the outriggers are automatically cleared, solving the outrigger stability problem, reducing labor intensity, and increasing the service life of the device.

CN224091528UActive Publication Date: 2026-04-07DEMAG CRANE (DALIAN) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-26
Publication Date
2026-04-07

AI Technical Summary

Technical Problem

The stones and mud attached to the underside of the existing crane legs affect stability, and manual cleaning is labor-intensive and inconvenient.

Method used

Design a crane outrigger protection device that includes a mud scraping mechanism and a protective mechanism. The outrigger uses a hydraulic cylinder and a push rod to make the outrigger plate contact the ground. The mud scraping mechanism cleans up stones and mud with a scraper, and the protective mechanism protects the hydraulic cylinder to reduce wear.

Benefits of technology

It enables automated cleaning of stones and mud under the outriggers, reducing labor intensity and improving the stability of the crane and the service life of the equipment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of cranes, in particular to a crane supporting leg protection device which can help workers to clean stones and soil at the lower end of a supporting plate, and is convenient to use, low in labor intensity and high in practicability. Comprising a fixing plate, a mounting plate, a hydraulic cylinder, a push rod and a supporting plate, the mounting plate is fixedly mounted on the fixing plate, the hydraulic cylinder is fixedly mounted at the lower end of the fixing plate, the push rod is arranged at the output end of the hydraulic cylinder, and the supporting plate is fixedly mounted at the lower end of the push rod; the device further comprises a mud scraping mechanism and a protection mechanism, the mud scraping mechanism and the protection mechanism are installed on the fixing plate, the mud scraping mechanism has a mud scraping function, and the protection mechanism is used for protecting the hydraulic cylinder.
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Description

Technical Field

[0001] This utility model relates to the technical field of cranes, and in particular to a crane outrigger protection device. Background Technology

[0002] Crane outriggers are crucial safety support devices during crane operation. Their core function is to ensure the stability of the crane during lifting by expanding the support area and distributing load pressure, preventing overturning or structural damage. In the prior art, utility model patent application number 201020635300.4 discloses a wheeled crane and its outrigger protection device, which mainly consists of outriggers and a protective shell, with the upper part of the outriggers located inside the protective shell. When the crane is in use, the lower part of the outriggers simply needs to contact the ground. However, this design has the following problems: when using the crane on a construction site, the ground beneath the outriggers is often muddy. After use, stones may adhere to the lower end of the outriggers, affecting their stability during subsequent use. Therefore, workers need to manually remove the stones, which is labor-intensive and inconvenient. Therefore, a protective device is needed to assist workers in removing stones from under the outriggers. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a crane outrigger protection device that can help workers clean stones and mud from the lower end of the support plate, is easy to use, has low labor intensity, and is highly practical.

[0004] This utility model discloses a crane outrigger protection device, comprising a fixed plate, a mounting plate, a hydraulic cylinder, a push rod, and a support plate. The mounting plate is fixedly mounted on the fixed plate, and the hydraulic cylinder is fixedly mounted on the lower end of the fixed plate. A push rod is provided at the output end of the hydraulic cylinder, and the support plate is fixedly mounted on the lower end of the push rod. It also includes a mud-scraping mechanism and a protective mechanism, both mounted on the fixed plate. The mud-scraping mechanism has a mud-scraping function, and the protective mechanism protects the hydraulic cylinder. The mounting plate is mounted on the crane. When the crane is in use, the hydraulic cylinder is opened, and the hydraulic cylinder lowers the support plate via the push rod, thus bringing the support plate into contact with the ground and improving the crane's stability. After the crane has finished using the crane, the hydraulic cylinder raises the support plate by using the push rod, and then the mud-scraping mechanism scrapes off the mud and stones adhering to the lower end of the support plate. This device helps workers clean the stones and mud from the lower end of the support plate, is easy to use, has low labor intensity, and is highly practical.

[0005] Preferably, the sludge scraping mechanism includes a scraper and a pushing mechanism. The scraper is mounted on a fixed plate via the pushing mechanism, which is used to move the scraper. When it is necessary to clean the lower end of the support plate, the support plate is first raised, and then the scraper is moved below the support plate via the pushing mechanism. After that, the support plate is lowered until it contacts the scraper, and then the scraper is moved left and right via the pushing mechanism. During the left and right movement, the scraper scrapes off the stones and mud attached to the lower end of the support plate, thus facilitating the cleaning of stones and mud at the lower end of the support plate.

[0006] Preferably, the pushing mechanism includes a support plate, a hydraulic cylinder, and a moving rod. The support plate is fixedly installed at the lower end of a fixed plate, the hydraulic cylinder is fixedly installed on the support plate, and the moving rod is slidably installed on the support plate. The input end of the moving rod is connected to the hydraulic cylinder, and the scraper is fixedly installed at the right end of the moving rod. When the scraper is moved left or right, the hydraulic cylinder is opened, and the hydraulic cylinder causes the scraper to move left or right through the moving rod. During the left and right movement, the scraper scrapes off the dirt at the lower end of the support plate, thus facilitating the cleaning of the lower end of the support plate.

[0007] Preferably, a rubber plate is provided at the upper end of the scraper, and the rubber plate is fixedly installed at the upper end of the scraper. With the above arrangement, when the scraper cleans the mud and stones at the lower end of the support plate, the rubber plate contacts the lower end of the support plate, which reduces the wear of the scraper on the support plate and improves the service life of the support plate.

[0008] Preferably, a pad is provided at the lower end of the support plate, and the pad is fixedly installed at the lower end of the support plate by bolts; with the above arrangement, the pad is in contact with the ground when the support plate is in use, and when the pad is worn too much, a new pad can be directly replaced at the lower end of the support plate; thus facilitating the replacement of the pad.

[0009] Preferably, the upper end of the pad is provided with two positioning grooves, and the lower end of the support plate is provided with two positioning blocks that cooperate with the two positioning grooves; when the pad is installed at the lower end of the support plate, the two positioning blocks at the lower end of the support plate are respectively inserted into the two positioning grooves at the upper end of the pad, which facilitates the positioning between the support plate and the pad.

[0010] Preferably, the protection mechanism includes a protective cylinder, which is installed at the lower end of the fixed plate. The protective cylinder has a chamber inside and an opening at the lower end of the protective cylinder that communicates with the chamber. The hydraulic cylinder is located inside the chamber of the protective cylinder. By protecting the hydraulic cylinder with the protective cylinder, the damage caused by rain and sunlight is reduced, thereby improving the service life of the hydraulic cylinder.

[0011] Compared with the prior art, the advantages of this utility model are: it can help workers clean the stones and mud at the bottom of the support plate, it is easy to use, has low labor intensity, and is highly practical. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the first isometric structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the second isometric structure of this utility model;

[0014] Figure 3 It is a structural diagram of the support plate, scraper, and hydraulic cylinder, etc.

[0015] Figure 4 It is a structural diagram of the pad, hydraulic cylinder, and push rod, etc.

[0016] Figure 5 It is a structural diagram of the pad, bolts, and cylinder, etc.

[0017] The following are labels in the attached diagram: 1. Fixing plate; 2. Mounting plate; 3. Hydraulic cylinder; 4. Push rod; 5. Support plate; 6. Scraper; 7. Support plate; 8. Oil cylinder; 9. Moving rod; 10. Rubber plate; 11. Pad plate; 12. Bolt; 13. Positioning groove; 14. Protective cylinder. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0019] Example 1

[0020] like Figures 1 to 5 The crane outrigger protection device of this utility model includes a fixed plate 1, a mounting plate 2, a hydraulic cylinder 3, a push rod 4, a support plate 5, a mud scraping mechanism, and a protection mechanism. The mounting plate 2 is fixedly mounted on the fixed plate 1, and the hydraulic cylinder 3 is fixedly mounted on the lower end of the fixed plate 1. The output end of the hydraulic cylinder 3 is provided with a push rod 4, and the support plate 5 is fixedly mounted on the lower end of the push rod 4. The mud scraping mechanism and the protection mechanism are mounted on the fixed plate 1. The mud scraping mechanism has the function of scraping mud, and the protection mechanism is used to protect the hydraulic cylinder 3. The mounting plate 2 is mounted on the crane. When the crane is in use, the hydraulic cylinder 3 is opened, and the hydraulic cylinder 3 lowers the support plate 5 through the push rod 4, thereby making the support plate 5 contact the ground and improving the stability of the crane. After the crane is finished using, the hydraulic cylinder 3 drives the push rod 4 to raise the support plate 5, and then the mud scraping mechanism scrapes off the mud and stones attached to the lower end of the support plate 5. It can help workers clean the stones and mud at the lower end of the support plate 5, is easy to use, has low labor intensity, and is highly practical.

[0021] like Figure 1 and Figure 3The sludge scraping mechanism includes a scraper 6 and a pushing mechanism. The scraper 6 is mounted on the fixed plate 1 via the pushing mechanism, which is used to move the scraper 6. When it is necessary to clean the lower end of the support plate 5, the support plate 5 is first raised, and then the scraper 6 is moved below the support plate 5 via the pushing mechanism. After that, the support plate 5 is lowered until it contacts the scraper 6, and then the scraper 6 is moved left and right via the pushing mechanism. During the left and right movement, the scraper 6 scrapes off the stones and mud attached to the lower end of the support plate 5, which facilitates the cleaning of stones and mud at the lower end of the support plate 5.

[0022] like Figure 3 The pushing mechanism includes a support plate 7, a hydraulic cylinder 8, and a moving rod 9. The support plate 7 is fixedly installed on the lower end of the fixed plate 1, the hydraulic cylinder 8 is fixedly installed on the support plate 7, and the moving rod 9 is slidably installed on the support plate 7. The input end of the moving rod 9 is connected to the hydraulic cylinder 8, and the scraper 6 is fixedly installed on the right end of the moving rod 9. When the scraper 6 is moved left or right, the hydraulic cylinder 8 is opened, and the hydraulic cylinder 8 moves the scraper 6 left or right through the moving rod 9. During the left and right movement, the scraper 6 scrapes off the soil at the lower end of the support plate 5, which facilitates the cleaning of the lower end of the support plate 5.

[0023] like Figure 3 A rubber plate 10 is provided at the upper end of the scraper 6, and the rubber plate 10 is fixedly installed at the upper end of the scraper 6. With the above arrangement, when the scraper 6 cleans the mud and stones at the lower end of the support plate 5, the rubber plate 10 contacts the lower end of the support plate 5, which reduces the wear of the scraper 6 on the support plate 5 and improves the service life of the support plate 5.

[0024] like Figure 4 A pad 11 is provided at the lower end of the support plate 5. The pad 11 is fixedly installed at the lower end of the support plate 5 by bolts 12. With the above arrangement, the pad 11 is in contact with the ground when the support plate 5 is in use. When the pad 11 is worn too much, a new pad 11 can be directly replaced at the lower end of the support plate 5. This facilitates the replacement of the pad 11.

[0025] The protective mechanism includes a protective cylinder 14, which is installed at the lower end of the fixed plate 1. The protective cylinder 14 has a chamber inside, and the lower end of the protective cylinder 14 has an opening communicating with the chamber. The hydraulic cylinder 3 is located in the chamber of the protective cylinder 14. By protecting the hydraulic cylinder 3 with the protective cylinder 14, the damage of external rain and sunlight to the hydraulic cylinder 3 is reduced, and the service life of the hydraulic cylinder 3 is improved.

[0026] Example 2

[0027] Based on Embodiment 1, the upper end of the pad 11 is provided with two positioning grooves 13, and the lower end of the support plate 5 is provided with two positioning blocks that cooperate with the two positioning grooves 13. When the pad 11 is installed on the lower end of the support plate 5, the two positioning blocks at the lower end of the support plate 5 are respectively inserted into the two positioning grooves 13 at the upper end of the pad 11, which facilitates the positioning between the support plate 5 and the pad 11. A protective cover is provided on the hydraulic cylinder 8.

[0028] The hydraulic cylinder 3, scraper 6, oil cylinder 8, rubber plate 10, and pad 11 of the crane outrigger protection device of this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A crane outrigger protection device, comprising a fixed plate (1), a mounting plate (2), a hydraulic cylinder (3), a push rod (4), and a support plate (5), wherein the mounting plate (2) is fixedly mounted on the fixed plate (1), the hydraulic cylinder (3) is fixedly mounted on the lower end of the fixed plate (1), the output end of the hydraulic cylinder (3) is provided with a push rod (4), and the support plate (5) is fixedly mounted on the lower end of the push rod (4); characterized in that, It also includes a mud scraping mechanism and a protection mechanism, which are mounted on a fixed plate (1). The mud scraping mechanism has the function of scraping mud, and the protection mechanism is used to protect the hydraulic cylinder (3).

2. The crane outrigger protection device as described in claim 1, characterized in that, The sludge scraping mechanism includes a scraper (6) and a pushing mechanism. The scraper (6) is mounted on a fixed plate (1) by the pushing mechanism, which is used to move the scraper (6).

3. A crane outrigger protection device as described in claim 2, characterized in that, The pushing mechanism includes a support plate (7), a hydraulic cylinder (8), and a moving rod (9). The support plate (7) is fixedly installed on the lower end of the fixed plate (1), the hydraulic cylinder (8) is fixedly installed on the support plate (7), the moving rod (9) is slidably installed on the support plate (7), the input end of the moving rod (9) is connected to the hydraulic cylinder (8), and the scraper (6) is fixedly installed on the right end of the moving rod (9).

4. A crane outrigger protection device as described in claim 2, characterized in that, A rubber plate (10) is provided at the upper end of the scraper (6), and the rubber plate (10) is fixedly installed at the upper end of the scraper (6).

5. A crane outrigger protection device as described in claim 1, characterized in that, A pad (11) is provided at the lower end of the support plate (5), and the pad (11) is fixedly installed at the lower end of the support plate (5) by bolts (12).

6. A crane outrigger protection device as described in claim 5, characterized in that, The upper end of the pad (11) is provided with two positioning grooves (13), and the lower end of the support plate (5) is provided with two positioning blocks that cooperate with the two positioning grooves (13).

7. A crane outrigger protection device as described in claim 1, characterized in that, The protective mechanism includes a protective cylinder (14), which is installed at the lower end of the fixed plate (1). A chamber is provided inside the protective cylinder (14), and an opening communicating with the chamber is provided at the lower end of the protective cylinder (14). The hydraulic cylinder (3) is located in the chamber of the protective cylinder (14).

Citation Information

Patent Citations

  • Wheel crane and ground jack protective device thereof

    CN201980910U