Guide wheel for crawler crane

Abstract

The utility model discloses a guide wheel for a crawler crane, which belongs to the technical field of crawler cranes and comprises a crawler crane chassis, a guide wheel and a fixing bolt, a bearing is arranged in the middle of the guide wheel, a mounting shaft is arranged on the crawler crane chassis, a positioning hole is arranged in the middle of the mounting shaft, a threaded hole is arranged on the crawler crane chassis, and the fixing bolt is arranged in the threaded hole. The fixing bolt is installed in the positioning hole and the threaded hole, a limiting groove is formed in the upper portion of the surface of the fixing bolt, an installation hole is formed in the right side of the threaded hole, a limiting rod is arranged in the installation hole, a pull rod is arranged at the right end of the limiting rod, the pull rod is sleeved with a spring, and a through hole is formed in the right end of the installation hole. A hole is formed in the pull rod, a sealing gasket is arranged on the right portion of the surface of the pull rod, the spring pushes the limiting rod to move to clamp the limiting groove to fix the fixing bolt, the fixing bolt is blocked by the limiting rod when loosened, and therefore the guide wheel is stably fixed through the fixing bolt.

Description

Technical Field

[0001] The utility model relates to the technical field of crawler cranes, in particular to a guide wheel for crawler cranes. Background Art

[0002] The guide wheel on the crawler crane guides the crawler crane's tracks. If the wear of the crawler crane's guide wheel exceeds the control range or the guide wheel is damaged, the guide wheel needs to be disassembled and replaced. For example, in a crawler crane guide wheel disclosed in Chinese patent literature (patent number: CN201821303775.6), the guide wheel is partially replaced. This guide wheel itself is not a whole, and its own strength is limited. It is supported by support bars. The support bars are small in size. To ensure the support strength, high-strength materials need to be used, which undoubtedly increases the production cost of the guide wheel. The guide wheel is fixed partially by bolts. Once the bolts are loose, the various parts of the entire guide wheel will become loose, which will reduce the strength of the guide wheel itself and make it more susceptible to damage.

[0003] To this end, we propose a guide wheel for crawler crane. Utility Model Content

[0004] The purpose of the utility model is to provide a guide wheel for a crawler crane to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a guide wheel for a crawler crane, comprising a crawler crane chassis, a guide wheel and a fixing bolt, a bearing is provided on the upper middle part of the guide wheel, a mounting shaft is provided on the crawler crane chassis, a positioning hole is provided in the middle part of the mounting shaft, a threaded hole is provided on the crawler crane chassis, the fixing bolt is installed in the positioning hole and the threaded hole, a limiting groove is provided on the upper surface of the fixing bolt, a mounting hole is provided on the right side of the threaded hole, a limiting rod is provided in the mounting hole, a pull rod is provided at the right end of the limiting rod, a spring is sleeved on the pull rod, a through hole is provided at the right end of the mounting hole, a hole is provided on the pull rod, and a sealing gasket is provided on the right part of the pull rod surface.

[0006] Furthermore, the right end of the pull rod extends out of the through hole, and the sealing gasket is located on the left side of the hole.

[0007] Furthermore, the right end of the through hole is chamfered, and the upper and lower left sides of the sealing gasket are both inclined.

[0008] Furthermore, the limiting rod is slidably connected to the inner wall of the mounting hole, and the right end of the limiting rod is fixedly connected to the pull rod.

[0009] Furthermore, the limiting groove is provided around the fixing bolt.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: after the pull rod drives the limit rod to move to the right and retract into the mounting hole, the fixing bolt is tightened. After the fixing bolt is tightened, the center of the limit slot set on the fixing bolt and the center of the limit rod are in the same horizontal straight line. The pull rod is loosened, and the spring pushes the limit rod to move and clamp the limit slot to fix the fixing bolt. The loosening of the fixing bolt will be blocked by the limit rod, so that the fixing bolt can stably fix the guide wheel. To disassemble the guide wheel, pull the pull rod to retract the limit rod into the mounting hole, loosen the fixing bolt, and quickly disassemble the guide wheel. While ensuring the strength of the guide wheel itself, the guide wheel can be quickly disassembled and installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the guide wheel installation structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the fixing bolt limiting structure of the utility model;

[0014] Figure 4 This is an enlarged view of point A of the present utility model.

[0015] In the figure: 1. Crawler crane chassis; 2. Guide wheel; 3. Fixing bolt; 4. Bearing; 5. Mounting shaft; 6. Positioning hole; 7. Threaded hole; 8. Limiting groove; 9. Mounting hole; 10. Limiting rod; 11. Pull rod; 12. Spring; 13. Through hole; 14. Hole; 15. Sealing gasket. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-4The utility model provides a technical solution: a guide wheel for a crawler crane, comprising a crawler crane chassis 1, a guide wheel 2 and a fixing bolt 3, a bearing 4 is provided on the upper middle part of the guide wheel 2, a mounting shaft 5 is provided on the crawler crane chassis 1, a positioning hole 6 is provided in the middle of the mounting shaft 5, a threaded hole 7 is provided on the crawler crane chassis 1, the fixing bolt 3 is installed in the positioning hole 6 and the threaded hole 7, a limiting groove 8 is provided on the upper surface of the fixing bolt 3, a mounting hole 9 is provided on the right side of the threaded hole 7, a limiting rod 10 is provided in the mounting hole 9, a pull rod 11 is provided at the right end of the limiting rod 10, a spring 12 is sleeved on the pull rod 11, a through hole 13 is provided at the right end of the mounting hole 9, a hole 14 is provided on the pull rod 11, a sealing gasket 15 is provided on the right part of the surface of the pull rod 11, the guide wheel 2 is installed, and the guide wheel 2 is installed on the mounting shaft 5 When the wheel 2 is disassembled, the pull rod 11 is pulled to the right, and the limit rod 10 is retracted into the mounting hole 9. Then, the fixing bolt 3 is tightened. After the fixing bolt 3 is tightened, the center of the limit slot 8 set on the fixing bolt 3 and the center of the limit rod 10 are in the same horizontal straight line. Loosen the pull rod 11, and the spring 12 pushes the limit rod 10 to move and clamp the limit slot 8 to fix the fixing bolt 3. The loosening of the fixing bolt 3 will be blocked by the limit rod 10, so that the fixing bolt 3 can stably fix the guide wheel 2. To disassemble the guide wheel 2, pull the pull rod 11 to retract the limit rod 10 into the mounting hole 9, loosen the fixing bolt 3, and quickly disassemble the guide wheel 2. While ensuring the strength of the guide wheel itself, the guide wheel 2 can be quickly disassembled and installed.

[0018] The right end of the pull rod 11 extends out of the through hole 13, and the sealing gasket 15 is located on the left side of the hole 14. The hole 14 is provided so that a steel chisel or a screwdriver can be passed through the hole 14 to facilitate pulling the pull rod 11.

[0019] The right end of the through hole 13 is chamfered, and the upper and lower left sides of the sealing gasket 15 are inclined. The sealing gasket seals the through hole 13 to prevent dust or dirt from entering the through hole 13, which would make it difficult for the pull rod 11 to move.

[0020] The limiting rod 10 is slidably connected to the inner wall of the mounting hole 9, and the right end of the limiting rod 10 is fixedly connected to the pull rod 11. The limiting rod 10 slides left and right in the mounting hole 9, which facilitates the removal and installation of the guide wheel 2;

[0021] The limiting groove 8 is provided around the fixing bolt 3 in a circle, which makes it easier for the limiting rod 10 to clamp the limiting groove 8 and fix the fixing bolt 3 .

[0022] Working principle: Install the guide wheel 2 on the mounting shaft 5, and the fixing bolt 3 passes through the positioning hole 3 and is connected to the threaded hole 7. Pull the pull rod 11 to the right. The pull rod 11 drives the limit rod 10 to move to the right and retract into the mounting hole 9, and then tighten the fixing bolt 3. After the fixing bolt 3 is tightened, the center of the limit slot 8 set on the fixing bolt 3 and the center of the limit rod 10 are in the same horizontal straight line. Loosen the pull rod 11, and the spring 12 pushes the limit rod 10 to move and clamp the limit slot 8 to fix the fixing bolt 3. The loosening of the fixing bolt 3 will be blocked by the limit rod 10, so that the fixing bolt 3 can stably fix the guide wheel 2. To disassemble the guide wheel 2, pull the pull rod 11 to retract the limit rod 10 into the mounting hole 9, loosen the fixing bolt 3, and quickly disassemble the guide wheel 2. While ensuring the strength of the guide wheel itself, the guide wheel 2 can be quickly disassembled and installed.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A guide wheel for a crawler crane, comprising a crawler crane chassis (1), a guide wheel (2) and a fixing bolt (3), characterized in that: A bearing (4) is provided on the middle part of the guide wheel (2), a mounting shaft (5) is provided on the crawler chassis (1), a positioning hole (6) is provided in the middle part of the mounting shaft (5), a threaded hole (7) is provided on the crawler chassis (1), the fixing bolt (3) is installed in the positioning hole (6) and the threaded hole (7), a limiting groove (8) is provided on the upper surface of the fixing bolt (3), a mounting hole (9) is provided on the right side of the threaded hole (7), a limiting rod (10) is provided in the mounting hole (9), a pull rod (11) is provided at the right end of the limiting rod (10), a spring (12) is sleeved on the pull rod (11), a through hole (13) is provided at the right end of the mounting hole (9), a hole (14) is provided on the pull rod (11), and a sealing gasket (15) is provided on the right part of the surface of the pull rod (11).

2. The guide wheel for a crawler crane according to claim 1, characterized in that: The right end of the pull rod (11) extends out of the through hole (13), and the sealing gasket (15) is located on the left side of the hole (14).

3. The guide wheel for a crawler crane according to claim 1, characterized in that: The right end of the through hole (13) is chamfered, and the upper and lower left sides of the sealing gasket (15) are both inclined.

4. The guide wheel for a crawler crane according to claim 1, characterized in that: The limiting rod (10) is slidably connected to the inner wall of the mounting hole (9), and the right end of the limiting rod (10) is fixedly connected to the pull rod (11).

5. The guide wheel for a crawler crane according to claim 1, characterized in that: The limiting groove (8) is provided around the fixing bolt (3).

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