Ramp-type coupling

Abstract

The patent application belongs to the technical field of couplings, and particularly relates to a drum gear type coupling, which comprises two symmetrically arranged sleeves, the inner wall of the sleeve is provided with internal teeth which are engaged with external teeth, the outer wall of the sleeve is provided with a connecting flange, the two connecting flanges are fixed through bolts, the inner side end surface between the two sleeves is clamped with a sealing ring, the inner wall of the sleeve is provided with a limiting ring, the limiting ring axially limits the external teeth on one side, the outer side end surface of the sleeve is detachably installed with a ring-shaped cover, a sealing part is arranged between the ring-shaped cover and the limiting ring, the sealing part is sequentially provided with a first elastic ring, a second elastic ring and a first metal ring from inside to outside, the first elastic ring and the second elastic ring are clamped through an annular clamping groove and an annular protrusion; the purpose lies in that the service life is longer, maintenance is more convenient, the coupling after replacement of the material has reduced wear, and safe operation of the unit is ensured.

Description

Technical Field

[0001] This utility model relates to the field of coupling technology, specifically to a drum-shaped gear coupling. Background Technology

[0002] The drum-shaped gear coupling is a rigid-flexible coupling device with multi-directional axial misalignment compensation capability. Its main structure consists of inner and outer gear sleeves. The outer gear adopts a spherical drum-shaped tooth design, and radial and axial compensation is achieved by meshing with the inner tooth through the tooth tip curved surface.

[0003] Existing drum gear couplings generally have poor sealing performance, and grease tends to leak from both ends during operation. An existing patent for a drum gear coupling with long-lasting lubrication (CN220470499U) forms a seal by setting a sealing ring and a sealing gasket on both sides of the internal teeth. However, the sealing gasket is fitted onto the main shaft. As shown in the attached drawings of the patent, the sealing gasket is a simple flat gasket or packing ring. During the long-term high-speed rotation of the main shaft, this part is very prone to wear, leading to seal failure. Moreover, replacing the sealing gasket requires disassembling the entire coupling, which is quite troublesome. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a drum-shaped gear coupling with a longer service life and more convenient maintenance.

[0005] The technical solution adopted in this utility model is as follows: A drum-shaped gear coupling includes two symmetrically arranged sleeves. The inner wall of each sleeve has internal teeth that mesh with external teeth. The outer wall of each sleeve has connecting flanges, which are fixed together by bolts. A sealing ring is engaged between the inner end faces of the two sleeves. A limiting ring is provided on the inner wall of each sleeve, which axially limits the external teeth on one side. An annular cover is detachably installed on the outer end face of each sleeve. A sealing part is provided between the annular cover and the limiting ring. The sealing part consists of a first elastic ring, a second elastic ring, and a first metal ring from the inside to the outside. The first elastic ring and the second elastic ring are engaged by an annular groove and an annular protrusion.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: By replacing the sealing gasket ring in the existing patent with a sealing part, the smooth surface of the metal ring is utilized to cause the first metal ring in the sealing part to wear down first. Since the first elastic ring and the second elastic ring are in a locked state and are pressed by the annular cover, the side of the limiting ring is sealed, so that even if the first metal ring is partially worn, it can still maintain a certain seal. When this part needs to be replaced, the annular cover can be removed directly, making maintenance more convenient.

[0007] In a preferred embodiment of this utility model, there are multiple annular grooves and annular protrusions, which are spaced apart along the axial direction.

[0008] Beneficial effects: By setting multiple annular grooves and annular protrusions, the gap between the first elastic ring and the second elastic ring is more tortuous, the path of grease leakage is extended, making it difficult for grease to leak.

[0009] In a preferred embodiment of this utility model, the annular cover includes a cylindrical body extending into the sleeve and a plate body on the outer end face of the sleeve, wherein the plate body and the outer end face of the sleeve have multiple corresponding threaded holes.

[0010] Beneficial effects: The above-mentioned design allows the ring cover to be disassembled and assembled with bolts, and the cylinder can press the first elastic ring and the second elastic ring together to ensure its sealing performance.

[0011] In a preferred embodiment of this utility model, the side wall of the limiting ring is provided with a rotating groove, and the width of the first metal ring is greater than the width of the first elastic ring and the second elastic ring.

[0012] Beneficial effect: By setting the rotating groove, the path of grease leakage is extended, and even if the outer end face of the first metal ring is worn, a certain degree of sealing can still be maintained.

[0013] In a preferred embodiment of the present invention, the sealing ring includes a second metal ring, a third elastic ring, and a fourth elastic ring. The third elastic ring and the fourth elastic ring are respectively fixedly connected to both sides of the second metal ring. Both inner end faces of the two sleeves are provided with engagement grooves, and the third elastic ring and the fourth elastic ring are respectively tightened in the corresponding engagement grooves.

[0014] Beneficial effects: When the spindle rotates, the sealing ring is subjected to less force and is generally not prone to wear. Therefore, the second metal ring, the third elastic ring and the fourth elastic ring can be fixed by bonding, and then the locking groove is used to tighten and seal.

[0015] In a preferred embodiment of this utility model, the upper end of the second metal ring is provided with a grease injection port, and the lower end of the second metal ring is provided with a grease discharge port.

[0016] Beneficial effects: Injecting grease from a high point and draining grease from a low point until fresh grease is discharged ensures that the internal cavity is completely filled with fresh grease. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the drum-shaped gear coupling of this utility model; Figure 2 This is a schematic diagram of the internal structure of a single-sided sleeve in an embodiment of the drum-shaped gear coupling of this utility model; Figure 3 This is a partial cross-sectional view of the first elastic ring in an embodiment of the drum-shaped gear coupling of this utility model.

[0018] The reference numerals in the attached drawings include: sleeve 1, connecting flange 11, limiting ring 12, external teeth 2, internal teeth 3, sealing ring 4, second metal ring 41, third elastic ring 42, fourth elastic ring 43, first elastic ring 51, second elastic ring 52, first metal ring 53, annular groove 54, annular protrusion 55, annular cover 6, cylinder 61, plate 62, and grease inlet 7. Detailed Implementation

[0019] Typical embodiments embodying the features and advantages of this utility model will be specifically described in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0020] In the description of this application, the terms "first", "second", etc. are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0021] See Figures 1-3 As shown, this embodiment discloses a drum-shaped gear coupling, including two symmetrically arranged sleeves 1. The inner wall of each sleeve 1 is provided with internal teeth 3 that mesh with external teeth 2. The outer wall of each sleeve 1 is provided with connecting flanges 11. The two connecting flanges 11 are fixed by bolts. A sealing ring 4 is engaged between the inner end faces of the two sleeves 1. A limiting ring 12 is provided on the inner wall of each sleeve 1. One side of the limiting ring 12 axially limits the external teeth 2. An annular cover 6 is detachably installed on the outer end face of each sleeve 1. A sealing part is provided between the annular cover 6 and the limiting ring 12.

[0022] The sealing part consists of a first elastic ring 51, a second elastic ring 52, and a first metal ring 53 from the inside out. The first elastic ring 51 and the second elastic ring 52 are fastened together by an annular groove 54 and an annular protrusion 55. There are multiple annular grooves 54 and annular protrusions 55, which are spaced apart along the axial direction. The side wall of the limiting ring 12 is provided with a rotating groove. The width of the first metal ring 53 is greater than the width of the first elastic ring 51 and the second elastic ring 52. Through the above arrangement, the path of grease leakage is extended, making it difficult for grease to leak.

[0023] The annular cover 6 includes a cylindrical body 61 extending into the sleeve 1 and a plate 62 on the outer end face of the sleeve 1. The plate 62 and the outer end face of the sleeve 1 have multiple corresponding threaded holes, so that the annular cover 6 can be disassembled and assembled by bolts to ensure its sealing performance.

[0024] The sealing ring 4 includes a second metal ring 41, a third elastic ring 42, and a fourth elastic ring 43. The third elastic ring 42 and the fourth elastic ring 43 are respectively bonded to both sides of the second metal ring 41. The inner end faces of the two sleeves 1 are provided with engagement grooves. The third elastic ring 42 and the fourth elastic ring 43 are respectively tightened in the corresponding engagement grooves to achieve a seal between the two sleeves 1.

[0025] In this embodiment, the first elastic ring 51 and the second elastic ring 52 should be made of rubber, the sleeve 1 is made of 38CrMoAIA-IV, the limiting ring 12, the first metal ring 53 and the second metal ring 41 are made of 25Cr2MoVA-II, the external tooth 2 is made of 20CrMnTi, and the internal tooth 3 is made of 38CrMoAIA.

[0026] The second metal ring 41 has a grease injection port 7 at its upper end and a grease discharge port at its lower end. Both the grease injection port 7 and the grease discharge port are provided with sealing pipe threads, which can be sealed by a nut with corresponding threads.

[0027] In this embodiment, during use, the first elastic ring 51 and the second elastic ring 52 are sealed by multiple annular grooves 54 and annular protrusions 55 interlocking with each other, and the outer wall of the first metal ring 53 is worn first, so that it is less likely to affect the seal between the first elastic ring 51 and the second elastic ring 52, thereby improving the service life. The annular cover 6 installed by bolts is easy to disassemble and assemble. When the grease needs to be replaced, the grease is injected from the high point and discharged from the waste nozzle from the low point, making maintenance convenient.

[0028] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A drum-shaped gear coupling, comprising two symmetrically arranged sleeves, wherein the inner wall of each sleeve is provided with internal teeth that mesh with external teeth, and the outer wall of each sleeve is provided with connecting flanges, the two connecting flanges being fixed by bolts, and a sealing ring engaging on the inner end face between the two sleeves, characterized in that: The inner wall of the sleeve is provided with a limiting ring. One side of the limiting ring axially limits the external teeth. An annular cover is detachably installed on the outer end face of the sleeve. A sealing part is provided between the annular cover and the limiting ring. The sealing part consists of a first elastic ring, a second elastic ring, and a first metal ring from the inside to the outside. The first elastic ring and the second elastic ring are clamped together by an annular groove and an annular protrusion.

2. The drum-shaped gear coupling according to claim 1, characterized in that: The number of annular slots and annular protrusions is multiple, and they are spaced apart along the axial direction.

3. The drum-shaped gear coupling according to claim 1, characterized in that: The annular cover includes a cylindrical body extending into the sleeve and a plate on the outer end face of the sleeve, with multiple corresponding threaded holes formed on the plate and the outer end face of the sleeve.

4. The drum-shaped gear coupling according to claim 1, characterized in that: The sidewall of the limiting ring is provided with a rotating groove, and the width of the first metal ring is greater than the width of the first elastic ring and the second elastic ring.

5. The drum-shaped gear coupling according to claim 1, characterized in that: The sealing ring includes a second metal ring, a third elastic ring, and a fourth elastic ring. The third elastic ring and the fourth elastic ring are respectively fixedly connected to both sides of the second metal ring. Both inner end faces of the two sleeves are provided with engagement grooves, and the third elastic ring and the fourth elastic ring are respectively tightened in the corresponding engagement grooves.

6. The drum-shaped gear coupling according to claim 5, characterized in that: The upper end of the second metal ring is provided with a grease injection port, and the lower end of the second metal ring is provided with a grease discharge port.

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