Transmission shaft with dustproof structure

Abstract

The transmission shaft with the dustproof structure comprises a first shaft, a second shaft and a dustproof sleeve, the first shaft and the second shaft are connected through a universal joint, and the two ends of the dustproof sleeve are fastened on the outer wall of the first shaft and the outer wall of the second shaft through hoops respectively. Concave-convex grain structures are arranged at the contact position of the outer wall of the first shaft and the dustproof sleeve and the contact position of the outer wall of the second shaft and the dustproof sleeve. The sealing structure has the advantages that the concave-convex lines are additionally arranged on the outer wall of the shaft, and the dustproof sleeve is a rubber body and has certain elastic deformation capacity, so that when the dustproof sleeve is fixed on the shaft by using a hoop, the inner wall of the dustproof sleeve is tightly attached and embedded into the concave-convex lines on the surface of the shaft under the action of external force, and a mechanical occlusion type sealing structure is formed; a limiting baffle ring is additionally arranged on the outer wall of the shaft, the installation position of the dustproof sleeve is limited, meanwhile, an annular groove is formed in the limiting baffle ring, a V-shaped sealing ring is arranged in the annular groove, and after the dustproof sleeve is tightly attached to the V-shaped sealing ring, an elastic contact sealing structure is formed.

Description

Technical Field

[0001] This utility model relates to the field of transmission component manufacturing, and in particular to a transmission shaft with a dustproof structure. Background Technology

[0002] A driveshaft is a shaft component used to transmit power between different mechanical parts, ensuring efficient and stable power transmission from the power source. Some driveshafts may be divided into multiple sections (such as the driveshaft in a car's steering gear), with adjacent ends connected by universal joints (U-joints). A corrugated rubber dust cover is installed at the connection point to prevent dust and provide a seal, preventing grease leakage and blocking the intrusion of external contaminants.

[0003] Currently, the installation structure of dust covers on this type of drive shaft has the following defects:

[0004] 1. The dust cover is fixed to the shaft body by clamps at both ends. However, there will inevitably be gaps between the dust cover and the smooth shaft body. During the operation of the equipment, especially the drive shaft in some vehicle chassis, the working conditions are extremely harsh. Dust, mud and other pollutants can easily enter the universal joint through these gaps. Long-term accumulation will affect the performance and life of the drive shaft.

[0005] 2. Maintenance of the drive shaft includes applying grease inside the shaft and at the shaft connection (i.e., the universal joint) to lubricate it. To prevent dust, some shafts have the grease injection port located inside a dust cover, which means that the dust cover needs to be removed and installed every time grease is applied. However, the dust cover itself is not damaged and can still be used. Therefore, the process of removing and installing the dust cover is only for the purpose of applying grease, which is cumbersome and time-consuming.

[0006] Therefore, this case is brought. Utility Model Content

[0007] The purpose of this invention is to provide a drive shaft with a dustproof structure to improve the dustproof effect and facilitate subsequent maintenance.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] A drive shaft with a dustproof structure includes a first shaft, a second shaft, and a dustproof sleeve. The first shaft and the second shaft are connected by a universal joint. The dustproof sleeve is a corrugated tube structure made of rubber, and its two ends are fastened to the outer walls of the first shaft and the second shaft by clamps. The outer wall of the first shaft and the dustproof sleeve are provided with a textured structure at the contact points. The outer wall of the second shaft and the dustproof sleeve are provided with a textured structure at the contact points.

[0010] Furthermore, both shaft one and shaft two have integrally formed limiting protrusions on their outer walls. One end face of the dust cover is in close contact with the limiting protrusion on shaft one, and the other end face of the dust cover is in close contact with the limiting protrusion on shaft two.

[0011] Furthermore, an annular groove is provided on the side of the limiting protrusion that is in close contact with the end face of the dust cover, and a sealing ring is installed in the annular groove, with the end face of the dust cover tightly attached to the sealing ring.

[0012] Furthermore, the sealing ring is a V-shaped sealing ring.

[0013] Furthermore, an grease injection hole is provided on the side wall of the shaft, which is located within the coverage area of ​​the dust cover. The dust cover has a through hole and a plug.

[0014] Furthermore, the dust cover has a second through hole, which is located on the outside of the universal joint, and a plug is provided on the second through hole.

[0015] Furthermore, the plug sequentially includes an integrally formed plug post, a plug cap, and a plug handle, wherein the plug post is used to seal the channel, the plug cap is used to cover the gap between the plug post and the channel, and the plug handle is convenient for the operator to handle.

[0016] Furthermore, the dust cover has reinforcing ribs at both ends.

[0017] The advantages of this utility model are:

[0018] 1. Based on the existing dust cover installation structure, a textured surface is added to the outer wall of the shaft. Since the dust cover is made of rubber, it has a certain elastic deformation capacity. When the dust cover is fixed to the shaft using a clamp, under the action of external force, the inner wall of the dust cover will tightly fit and embed into the textured surface of the shaft, thus forming a mechanical interlocking seal structure. This is one layer of sealing. In addition, a limiting ring is added to the outer wall of the shaft to restrict the installation position of the dust cover. An annular groove is also opened on the limiting ring, and a V-shaped sealing ring is set in the annular groove. When the dust cover is tightly fitted to the V-shaped sealing ring, an elastic contact seal structure is formed. This is another layer of sealing. The two sealing structures effectively prevent the intrusion of external contaminants.

[0019] 2. To facilitate regular lubrication and maintenance of the drive shaft body and universal joint, an oil injection hole is provided at an appropriate position on the dust cover for the oil injection gun nozzle to be inserted. When not in use, the hole can be sealed with a special rubber plug to prevent dust intrusion and grease leakage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the transmission shaft with a dustproof structure in the embodiment;

[0021] Figure 2 for Figure 1 Enlarged diagram of part A in the diagram;

[0022] Figure 3 for Figure 1 Enlarged schematic diagram of part B in the diagram;

[0023] Label Explanation

[0024] 1. Shaft 1; 2. Shaft 2; 3. Dust cover; 4. Universal joint; 5. Clamp; 6. Textured structure; 7. Limiting ring; 8. V-shaped seal; 9. Emulsion hole; 10. Through hole 1; 11. Through hole 2; 12. Reinforcing rib; 13. Hole plug; 131. Plug; 132. Plug cap; 133. Plug handle. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. indicated by the accompanying drawings are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0026] This embodiment proposes a drive shaft with a dustproof structure, such as... Figure 1 As shown, the drive shaft includes shaft 1 and shaft 2. Shaft 1 is a hollow shaft with a keyway for connecting to other shaft systems, and shaft 2 is also a hollow shaft. Shaft 1 and shaft 2 are connected by a universal joint 4, allowing relative movement between them. The drive shaft also includes a dust cover 3, which is a corrugated rubber structure. Both ends of the dust cover 3 are fastened to the outer walls of shaft 1 and shaft 2 by clamps 5. The dust cover 3 serves to prevent dust and provide a seal, preventing grease leakage and the intrusion of external contaminants.

[0027] As an improvement, such as Figure 2 As shown, this embodiment features two sealing structures.

[0028] The outer wall of shaft 1 and the dust cover 3 are both provided with textured structures 6. Since the dust cover 3 is made of rubber, it has a certain elastic deformation ability. When the dust cover 3 is fixed on the shaft with a clamp 5, the inner wall of the dust cover 3 will be tightly attached to and embedded in the textured structure on the shaft surface under the action of external force, thereby forming a mechanical interlocking seal structure. This is one of the seals.

[0029] Both shaft 1 and shaft 2 have integrally formed limiting rings 7 on their outer walls. One end face of the dust cover 3 is tightly fitted with the limiting ring 7 on shaft 1, and the other end face of the dust cover 3 is tightly fitted with the limiting ring 7 on shaft 2. An annular groove is formed on the side of the limiting ring 7 that is tightly fitted with the end face of the dust cover 3, and a V-shaped sealing ring 8 is installed in the annular groove. The end face of the dust cover 3 is tightly fitted with the V-shaped sealing ring 8. The addition of a limiting ring on the outer wall of the shaft restricts the installation position of the dust cover 3. When the dust cover 3 is tightly fitted with the V-shaped sealing ring 8, an elastic contact sealing structure is formed, which is another layer of sealing.

[0030] Continue to refer to Figure 1 A grease injection hole 9 is provided on the side wall of shaft 1, located within the coverage area of ​​dust sleeve 3. Dust sleeve 3 has a through hole 10 with a plug 13. Due to the presence of a retaining ring, after dust sleeve 3 is installed, through hole 10 and grease injection hole 9 are directly opposite each other. When grease injection is required, the plug 13 is opened, and the nozzle of the grease gun passes through through hole 10 into grease injection hole 9 to inject grease, thus achieving lubrication and maintenance of the drive shaft body.

[0031] refer to Figure 3 The dust cover 3 has a through hole 11 located on the outside of the universal joint 4, and a plug 13 is provided on the through hole 11. When grease injection is required, the plug 13 is opened, and the nozzle of the grease gun passes through the through hole 11 toward the universal joint 4 to inject grease, thereby achieving lubrication and maintenance of the universal joint 4.

[0032] To facilitate regular lubrication and maintenance of the drive shaft body and universal joint 4, an oil filling hole is provided at an appropriate location on the dust cover 3 for inserting the grease gun nozzle. This hole can be sealed with a special rubber plug 13 when not in use to prevent dust intrusion and grease leakage. (Reference) Figure 3 In this embodiment, the plug 13 includes an integrally formed plug 131, a plug cap 132, and a plug handle 133. The plug 131 is used to seal the channel, the plug cap 132 is used to cover the gap between the plug 131 and the channel, and the plug handle 133 is convenient for the operator to hold.

[0033] Since there is relative movement between shaft 1 and shaft 2, the corrugated part of the dust cover 3 will expand and contract during the movement, while the fixed part of the clamp 5 remains relatively stationary. Over time, cracks and other damage may easily occur at the junction of the fixed part of the clamp 5 and the corrugated expansion part of the dust cover 3. Preferably, in this embodiment, reinforcing ribs 12 are provided at both ends of the dust cover 3 to improve the strength at the junction of the fixed part of the clamp 5 and the corrugated expansion part of the dust cover 3.

[0034] The above embodiments are only used to explain the concept of this utility model, and are not intended to limit the protection of this utility model. Any non-substantial modifications made to this utility model using this concept should fall within the protection scope of this utility model.

Claims

1. A transmission shaft with dustproof structure, comprising a shaft one, a shaft two and a dustproof cover, the shaft one and the shaft two are connected through a universal joint, the dustproof cover is a corrugated pipe structure of rubber material, and two ends thereof are fastened on outer walls of the shaft one and the shaft two through hoops respectively. characterized in that A concave-convex structure is arranged at a position where the outer wall of the shaft one contacts the dustproof cover and at a position where the outer wall of the shaft two contacts the dustproof cover.

2. The drive shaft with a dustproof structure according to claim 1, characterized in that, Limiting convex rings are integrally formed on the outer walls of the shaft one and the shaft two, one end face of the dustproof cover is tightly attached to the limiting convex ring on the shaft one, and the other end face of the dustproof cover is tightly attached to the limiting convex ring on the shaft two.

3. The drive shaft with a dustproof structure according to claim 2, characterized in that, An annular groove is formed on one face of the limiting convex ring which is tightly attached to the end face of the dustproof cover, and a sealing ring is installed in the annular groove, and the end face of the dustproof cover is tightly attached to the sealing ring.

4. The drive shaft with a dustproof structure according to claim 3, characterized in that, The sealing ring is a V-shaped sealing ring.

5. The drive shaft with a dustproof structure according to claim 1, characterized in that, An ester injection hole is formed at a side wall of the shaft one, the ester injection hole is located in a coverage range of the dustproof cover, a through hole one is formed on the dustproof cover, and a hole plug is arranged on the through hole one.

6. The drive shaft with a dustproof structure according to claim 1, characterized in that, A through hole two is formed on the dustproof cover, the through hole two is located outside the universal joint, and a hole plug is arranged on the through hole two.

7. A drive shaft with a dust-proof structure according to any one of claims 5 or 6, characterized in that, The hole plug comprises a plug column, a plug cover and a plug handle which are integrally formed in sequence, the plug column is used for plugging the hole, the plug cover is used for covering the gap between the plug column and the hole, and the plug handle is convenient for the operator to hold.

8. The drive shaft with a dustproof structure according to claim 1, characterized in that, Reinforcing ribs are arranged at two ends of the dustproof cover.

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