Shaft for dustproof machine for crane
By arranging sealing grooves and sealing rings in the dustproof machine shaft of the crane to form a maze structure, the dust prevention problem at the connection between the wheel and the machine shaft is solved, and the service life is extended.
Patent Information
- Application Number
- CN202422969812.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-12-03
AI Technical Summary
The connection between the wheels and the machine shaft of existing cranes is easily affected by external dust and water vapor, which leads to corrosion and oxidation, shortening the service life.
A dust-proof machine shaft is designed. By setting multiple sealing grooves and sealing rings at the connection between the shaft body and the wheel body, a maze structure is formed. The extrusion force of the spring is used to ensure that the sealing ring fits tightly, achieving double-layer sealing to prevent dust and water vapor from entering.
Effectively prevent dust and moisture from entering the connection, reduce corrosion and oxidation, and extend service life.
Smart Images
Figure CN223399239U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of crane shafts, in particular to a dustproof crane shaft. Background Art
[0002] Cranes are lifting machines that lift objects vertically and carry objects horizontally within a certain range. Their shafts are cylindrical objects that pass through the wheels of the crane. They are the parts that support the rotation and rotate with it, transmitting motion and torque. The connection between the wheels and the shafts of existing cranes is exposed to the outside for a long time. Over time, fine dust and water vapor from the outside can easily enter the connection, making it susceptible to the influence of the external environment and prone to corrosion and oxidation over time. Utility Model Content
[0003] The technical problem to be solved by the present invention is to provide a dustproof machine shaft for a crane in order to solve the problems raised in the above-mentioned background technology.
[0004] The utility model solves its technical problem by adopting the following technical solution: a dustproof machine shaft for a crane, comprising a shaft body and a wheel body sleeved on the shaft body, a first limiting step being provided on the outer surface of the shaft body on one side of the wheel body, a second limiting step being detachably connected to the outer surface of the shaft body on the other side of the wheel body, annular protrusions being symmetrically provided on both sides of the wheel body, a receiving groove matching the annular protrusion being provided on the inner sides of the first limiting step and the second limiting step, a first sealing groove being provided inside the receiving groove, a second sealing groove communicating with the first sealing groove being provided on the annular protrusion, a first sealing ring being provided between the first sealing groove and the second sealing groove, an annular groove communicating with the first sealing groove being provided inside the first sealing groove, a spring being provided inside the annular groove, one end of the spring being connected to the first sealing ring, and when the annular protrusion is located inside the receiving groove, it squeezes the first sealing ring and the spring, a third sealing groove being provided at the position where the first limiting step and the second limiting step contact the side wall of the wheel body, and a second sealing ring being provided inside the third sealing groove.
[0005] Furthermore, the first sealing groove, the second sealing groove, and the annular groove are located on the same central axis.
[0006] Furthermore, when the annular protrusion does not enter the interior of the accommodating groove, under the action of the spring force, the first sealing ring is located outside the first sealing groove.
[0007] Furthermore, the third sealing groove is located at the edges of the first limiting step and the second limiting step, and the third sealing groove, the accommodating groove, the first sealing groove, and the annular groove are arranged concentrically.
[0008] Furthermore, a sleeve is provided on the side of the second limiting step away from the wheel body, a mounting hole matching the shaft body is opened inside the sleeve, and a plurality of fastening bolts are annularly provided on the outer surface of the sleeve, and the fastening bolts pass through the sleeve and are threadedly connected to the shaft body.
[0009] The beneficial effects of the utility model are:
[0010] The utility model forms a plurality of curved maze-shaped structures on both sides of the connection between the wheel body and the shaft body through the cooperation of the first limiting step, the second limiting step, the annular protrusion, the accommodating groove, the annular groove, the first sealing groove, the second sealing groove, the first sealing ring, the spring, the third sealing groove, and the second sealing ring. Moreover, the spring is squeezed so that the reverse force generated by the spring and the first sealing ring are firmly and tightly pressed against the inside of the first sealing groove and the second sealing groove, thereby forming a seal for the first limiting step, the second limiting step, and the connection with the annular protrusion, and the third sealing groove and the second sealing ring further seal their connection, thereby forming a double seal. The cooperation with each other forms a sealed protection for the connection between the wheel body and the shaft body, thereby making it less susceptible to the influence of the external environment and increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings.
[0012] Figure 1 This is a front sectional view of the present invention.
[0013] Figure 2 It is the front view of the utility model.
[0014] Figure 3 This is a left view of the second limiting step of the utility model.
[0015] Among them: 1. shaft body; 2. wheel body; 3. first limiting step; 4. second limiting step; 5. annular protrusion; 6. accommodating groove; 7. first sealing groove; 8. second sealing groove; 9. first sealing ring; 10. annular groove; 11. spring; 12. third sealing groove; 13. second sealing ring; 14. sleeve; 15. fastening bolt. DETAILED DESCRIPTION
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] Reference Figure 1-3As shown, the dustproof shaft for a crane includes a shaft body 1 and a wheel body 2 sleeved on the shaft body 1. A first limiting step 3 is provided on the outer surface of the shaft body 1 on one side of the wheel body 2, and a second limiting step 4 is detachably connected to the outer surface of the shaft body 1 on the other side of the wheel body 2. An annular protrusion 5 is symmetrically provided on both sides of the wheel body 2. A receiving groove 6 matching the annular protrusion 5 is opened on the inner side of the first limiting step 3 and the second limiting step 4. The outer wall of the annular protrusion 5 conflicts with the inner wall of the receiving groove 6, and the side walls of the first limiting step 3 and the second limiting step 4 conflict with the side wall of the wheel body 2. The first limiting step 3 and the second limiting step 4 surround the annular protrusion 5, so that the connection between the shaft body 1 and the wheel body 2 forms multiple bends from the inside out, so that the connection forms a maze-shaped structure, so that external dust and water vapor are not easy to enter the connection between the shaft body 1 and the wheel body 2 from the connection between the receiving groove 6 and the annular protrusion 5.
[0018] A first sealing groove 7 is provided inside the accommodating groove 6, and a second sealing groove 8 connected to the first sealing groove 7 is provided on the annular protrusion 5. A first sealing ring 9 is provided between the first sealing groove 7 and the second sealing groove 8. An annular groove 10 connected to the first sealing groove 7 is provided inside the first sealing groove 7, and a spring 11 is provided inside the annular groove 10. One end of the spring 11 is connected to the first sealing ring 9. When the annular protrusion 5 is located inside the accommodating groove 6, it squeezes the first sealing ring 9 and the spring 11. When the annular protrusion 5 does not enter the accommodating groove 6, under the action of the spring 11, the first sealing ring 9 is outside the first sealing groove 7. When the annular protrusion 5 enters the accommodating groove 6, the inner side wall of the second sealing groove 8 squeezes the first sealing ring 9, and the first sealing ring 9 squeezes the spring 11. The reverse force of the spring 11 makes the first sealing ring 9 tightly and firmly located between the first sealing groove 7 and the second sealing groove 8, thereby forming a seal on the connection between the accommodating groove 5 and the annular protrusion 5.
[0019] A third sealing groove 12 is provided at the portion where the first limiting step 3 and the second limiting step 4 conflict with the side wall of the wheel body 2. A second sealing ring 13 is provided inside the third sealing groove 12. The third sealing groove 12 is located at the edge of the first limiting step 3 and the second limiting step 4. The third sealing groove 12, the accommodating groove 6, the first sealing groove 7 and the annular groove 10 are cocentrically arranged. The second sealing ring 13 seals the connection between the first limiting step 3, the second limiting step 4 and the wheel body 2. The second sealing ring 13 cooperates with the first sealing ring 9 to form a double-layer seal, which forms a sealed protection for the connection between the wheel body and the shaft body, making it less susceptible to the influence of the external environment, less prone to corrosion and oxidation, and increasing its service life.
[0020] Preferably, the first sealing groove 7 , the second sealing groove 8 , and the annular groove 10 are located on the same central axis.
[0021] Preferably, a sleeve 14 is provided on the side of the second limiting step 4 away from the wheel body 2, and a mounting hole matching the shaft body 1 is opened inside the sleeve 14. A plurality of fastening bolts 15 are annularly provided on the outer surface of the sleeve 14. The fastening bolts 15 pass through the sleeve 14 and are threadedly connected to the shaft body 1. The second limiting step 4, the sleeve 14 and the shaft body 1 are detachably connected through the fastening bolts 15, and the second limiting step 4 and the first limiting step 3 cooperate with each other to limit the axial movement of the wheel body 2, making its connection with the shaft body 1 tighter and more secure.
[0022] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.
Claims
1. A dustproof shaft for a crane, comprising a shaft body (1) and a wheel body (2) sleeved on the shaft body (1), characterized in that: The outer surface of the shaft body (1) on one side of the wheel body (2) is provided with a first limiting step (3), and the outer surface of the shaft body (1) on the other side of the wheel body (2) is detachably connected with a second limiting step (4). Annular protrusions (5) are symmetrically provided on both sides of the wheel body (2). The first limiting step (3) and the second limiting step (4) are provided with a receiving groove (6) matching the annular protrusion (5). A first sealing groove (7) is provided inside the receiving groove (6). A second sealing groove (8) connected to the first sealing groove (7) is provided on the annular protrusion (5). A sealing groove (8) is provided between the first sealing groove (7) and the second sealing groove (8). A first sealing ring (9) is provided, an annular groove (10) communicating with the first sealing groove (7) is provided inside the first sealing groove (7), a spring (11) is provided inside the annular groove (10), one end of the spring (11) is connected to the first sealing ring (9), and when the annular protrusion (5) is located inside the accommodating groove (6), the first sealing ring (9) and the spring (11) are squeezed, a third sealing groove (12) is provided at the position where the first limiting step (3) and the second limiting step (4) contact the side wall of the wheel body (2), and a second sealing ring (13) is provided inside the third sealing groove (12).
2. The dustproof shaft for crane according to claim 1, characterized in that: The first sealing groove (7), the second sealing groove (8), and the annular groove (10) are located on the same central axis.
3. The dustproof shaft for crane according to claim 1, characterized in that: When the annular protrusion (5) does not enter the interior of the accommodating groove (6), under the action of the force of the spring (11), the first sealing ring (9) is located outside the first sealing groove (7).
4. The dustproof shaft for crane according to claim 1, characterized in that: The third sealing groove (12) is located at the edge of the first limiting step (3) and the second limiting step (4), and the third sealing groove (12), the accommodating groove (6), the first sealing groove (7), and the annular groove (10) are arranged concentrically.
5. The dustproof shaft for crane according to claim 1, characterized in that: A sleeve (14) is provided on the side of the second limiting step (4) away from the wheel body (2), a mounting hole matching the shaft body (1) is provided inside the sleeve (14), and a plurality of fastening bolts (15) are provided in an annular shape on the outer surface of the sleeve (14), and the fastening bolts (15) pass through the sleeve (14) and are threadedly connected to the shaft body (1).