A long-life drum gear coupling

Abstract

The present invention discloses a long-life drum-type gear coupling, which relates to the technical field of couplings. The present invention comprises a set of connecting parts and an outer hoop, wherein the connecting parts are composed of an inner sleeve and an outer gear sleeve, wherein the end of the outer gear sleeve of one connecting part is fixed with an inner cylinder, and a plurality of external keyways are provided on the circumferential side of the inner cylinder, and a rear cover edge is fixed on the circumferential side of the other end of the outer gear sleeve, and a close thread is provided on the circumferential side of the outer gear sleeve and at a position between the rear cover edge and the inner cylinder, and a screw sleeve is connected to the outer thread of the close thread, and a push ring is provided on the screw sleeve near one end of the inner cylinder, and the circumferential side of the outer gear sleeve of the other connecting part is fixed to the outer cylinder through the front cover edge. The present invention limits the two connecting parts in the axial direction by the outer hoop, transmits torque by the friction between the two connecting parts through the friction member, and has a torsional protection function, which greatly improves the service life of the coupling, the shaft body and the parts to be driven by the shaft body, and can also protect the meshing tooth part between the inner sleeve and the outer gear ring.

Description

Technical Field

[0001] The invention belongs to the technical field of couplings, and in particular relates to a long-life drum-type gear coupling. Background Art

[0002] The torque between the inner sleeve and the outer gear ring on the existing drum-type gear coupling is transmitted by the meshing teeth, and the two connecting parts transmit torque by flanges and bolts. The torque is mainly borne by the meshing teeth and the screw. If the load exceeds the limit, the tooth shape and screw will be deformed, displaced or damaged, affecting the normal use of the coupling, affecting the use effect and service life. Summary of the Invention

[0003] The purpose of the present invention is to provide a long-life drum-type gear coupling, which limits the two connecting parts in the axial direction through an outer hoop, transmits torque through the friction force between the two connecting parts through the friction parts, has a torque protection function, greatly improves the service life of the coupling, the shaft body and the parts to be driven by the shaft body, and can protect the meshing tooth part between the inner sleeve and the outer gear ring.

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention is a long-life drum-type gear coupling, comprising a set of connecting parts and an outer hoop, wherein the connecting parts are composed of an inner shaft sleeve and an outer gear sleeve;

[0006] An inner cylinder is fixed to the end of the outer gear sleeve of the connecting member, and a plurality of external key grooves are provided on the peripheral side of the inner cylinder. A rear cover edge is fixed to the peripheral side of the other end of the outer gear sleeve, and a dense thread is provided on the peripheral side of the outer gear sleeve and at a position between the rear cover edge and the inner cylinder;

[0007] The dense thread external thread is connected with a screw sleeve, and the screw sleeve is provided with a push ring near one end of the inner cylinder;

[0008] The outer tooth sleeve of the other connecting member is fixed with an outer cylinder through the front cover, and the inner wall of the outer cylinder is provided with a plurality of inner key grooves;

[0009] The inner cylinder is concentrically arranged in the outer cylinder, the end surface of the inner cylinder is in contact with the inner wall of the front cover and forms a cavity with one end open between the inner cylinder and the outer cylinder, and the push ring is slidably arranged at one end in the cavity;

[0010] A disc spring and a friction member are provided in the cavity and between the front cover edge and the push ring. The friction member is composed of a plurality of stacked first friction plates and second friction plates. The first friction plate has a first protrusion on its circumferential side surface that is slidably connected to the inner key groove, and the second friction plate has a second protrusion on its inner wall that is slidably connected to the outer key groove.

[0011] Both ends of the outer hoop are provided with outer folding edges. The outer hoop is composed of a group of symmetrically arranged half-sleeves. A group of support ears are provided on the outer sides of both ends of the half-sleeves. The two half-sleeves are fixed to the outside of the outer cylinder by the support ears and bolts. The inner sides of the two outer folding edges are respectively in contact with the outer side surfaces of the front cover edge and the rear cover edge.

[0012] Furthermore, one end of the inner sleeve is located in the outer gear sleeve and is provided with an inner gear ring meshing with the outer gear sleeve, and the inner wall of the inner sleeve is provided with a keyway.

[0013] Furthermore, a limiting ring is provided at one end of the outer gear sleeve away from the outer hoop ring, and a gap is formed between the inner wall of the limiting ring and the inner shaft sleeve.

[0014] Furthermore, the first friction plate is composed of a group of symmetrically arranged semicircular ring plates, one of the ring plates is provided with a notch at both ends, and the other ring plate is provided with a pin head that fits with the notch in an interference fit at both ends. The structural characteristics of the second friction plate are consistent with the structural characteristics of the first friction plate.

[0015] Furthermore, the outer diameter of the first friction plate is consistent with the inner diameter of the outer cylinder, a gap exists between the inner wall of the first friction plate and the inner cylinder, a gap is formed between the outer diameter of the second friction plate and the outer cylinder, and the inner diameter of the second friction plate is consistent with the outer diameter of the inner cylinder.

[0016] Furthermore, the disc spring is composed of a plurality of discs arranged in a stacked manner, and the discs are provided with an outer protrusion that cooperates with the outer keyway or the inner keyway.

[0017] Furthermore, a guide slope is provided at the inner edge of the outer fold.

[0018] Furthermore, the distance between the rear cover edge and the inner cylinder is greater than the width of the screw sleeve, and the difference is consistent with the elastic stroke of the disc spring.

[0019] Furthermore, a plurality of anti-slip grooves or a plurality of protruding rods are provided on the peripheral side surface of the screw sleeve, and one end of the protruding rods away from the screw sleeve is located inside the outer hoop.

[0020] The present invention has the following beneficial effects:

[0021] 1. The present invention provides a new structure at the external connection of the two outer gear sleeves, and limits the two connecting parts in the axial direction through an outer hoop. Torque is transmitted between the two connecting parts through the friction force of the friction member, which has a torsional protection function, greatly improving the service life of the coupling, the shaft body and the parts to be driven by the shaft body. At the same time, it can protect the meshing tooth part between the inner sleeve and the outer gear ring. The tightness of the friction member can be adjusted by the extrusion of the screw sleeve and the elastic force of the disc spring, thereby having an adjustable function.

[0022] 2. The present invention designs a combined outer hoop and friction member, so that the friction member can be replaced, maintained and cleaned, which is beneficial to the installation during production, ensures the use effect of the friction member, and is beneficial to the operation of the staff.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic structural diagram of a long-life drum-type gear coupling according to the present invention;

[0026] Figure 2 It is an exploded view of the structure of the present invention;

[0027] Figure 3 It is a cross-sectional view of the structure of the present invention;

[0028] Figure 4 It is a structural schematic diagram of a connector with an inner cylinder;

[0029] Figure 5 It is a structural schematic diagram of a connector with an outer cylinder;

[0030] Figure 6 It is a structural diagram of the screw sleeve;

[0031] Figure 7 Schematic diagram of the structure of the friction parts;

[0032] Figure 8 is a structural cross-sectional view of the first friction plate;

[0033] Figure 9 Schematic diagram of the structure of the outer hoop;

[0034] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0035] 1-inner sleeve, 2-outer gear sleeve, 3-outer hoop, 4-inner cylinder, 5-outer cylinder, 6-disc spring, 7-friction member, 101-inner gear ring, 102-keyway, 201-limiting ring, 301-outer folding edge, 302-half sleeve, 303-support ear, 304-guide slope, 401-outer keyway, 402-rear cover edge, 403-closed thread, 404-screw sleeve, 405-push ring, 406-protruding rod, 501-front cover edge, 502-inner keyway, 701-first friction plate, 702-second friction plate, 703-first convex head, 704-second convex head, 705-semicircular ring plate, 706-notch, 707-pin head. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 any creative efforts shall fall within the scope of protection of the present invention.

[0037] See also Figure 1-9 As shown, the present invention is a long-life drum-type gear coupling, comprising a set of connecting parts and an outer hoop 3, wherein the connecting parts are composed of an inner sleeve 1 and an outer gear sleeve 2;

[0038] An inner cylinder 4 is fixed to the end of the outer sleeve 2 of a connecting member. A plurality of external key grooves 401 are provided on the circumferential side of the inner cylinder 4. A rear cover 402 is fixed to the circumferential side of the other end of the outer sleeve 2. A tight thread 403 is provided on the circumferential side of the outer sleeve 2 and between the rear cover 402 and the inner cylinder 4.

[0039] The outer thread of the dense thread 403 is connected to a screw sleeve 404, and a push ring 405 is provided on the end of the screw sleeve 404 close to the inner cylinder 4;

[0040] The outer sleeve 2 of the other connecting part is fixed with an outer cylinder 5 via a front cover 501. The inner wall of the outer cylinder 5 is provided with a plurality of inner key grooves 502.

[0041] The inner cylinder 4 is concentrically arranged in the outer cylinder 5. The end surface of the inner cylinder 4 is in contact with the inner wall of the front cover 501 and forms a cavity with one end open between the inner cylinder 4 and the outer cylinder 5. The push ring 405 is slidably arranged at one end of the cavity.

[0042] A disc spring 6 and a friction member 7 are provided within the cavity, located between the front cover edge 501 and the push ring 405. The friction member 7 comprises a plurality of stacked first friction plates 701 and second friction plates 702. The first friction plates 701 are provided with first protrusions 703 slidably connected to the inner keyway 502 on their circumferential sides. The second friction plates 702 are provided with second protrusions 704 slidably connected to the outer keyway 401 on their inner walls.

[0043] Both ends of the outer hoop ring 3 are provided with outer folding edges 301. The outer hoop ring 3 is composed of a group of symmetrically arranged half-sleeves 302. A group of support ears 303 are provided on the outer sides of both ends of the half-sleeves 302. The two half-sleeves 302 are fixed to the outside of the outer cylinder 5 through the support ears 303 and bolts. The inner sides of the two outer folding edges 301 are respectively in contact with the outer side surfaces of the front cover edge 501 and the rear cover edge 402. When connecting, one half-sleeve 302 is first put on the outer cylinder 5 to limit the axial direction between the two outer gear sleeves 2.

[0044] Among them Figure 3-5 As shown, one end of the inner sleeve 1 is located in the outer gear sleeve 2 and is provided with an inner gear ring 101 meshing with the outer gear sleeve 2, and a key groove 102 is provided on the inner wall of the inner sleeve 1.

[0045] Among them Figure 1 and Figure 3 As shown, a limiting ring 201 is provided at one end of the outer gear sleeve 2 away from the outer hoop 3 , and a gap is formed between the inner wall of the limiting ring 201 and the inner shaft sleeve 1 .

[0046] Among them Figure 2-3 and Figure 7-8 As shown, the first friction plate 701 is composed of a group of symmetrically arranged semicircular ring plates 705, with notches 706 at both ends of one ring plate 705, and pin heads 707 that are interference fit with the notches 706 at both ends of the other ring plate 705. The structural features of the second friction plate 702 are consistent with those of the first friction plate 701.

[0047] Among them, the outer diameter of the first friction plate 701 is consistent with the inner diameter of the outer cylinder 5, and there is a gap between the inner wall of the first friction plate 701 and the inner cylinder 4. A gap is formed between the outer diameter of the second friction plate 702 and the outer cylinder 5, and the inner diameter of the second friction plate 702 is consistent with the outer diameter of the inner cylinder 4.

[0048] Among them Figure 2 As shown, the disc spring 6 is composed of a plurality of discs arranged in a stacked manner, and the discs are provided with an outer protrusion that cooperates with the outer key groove 401 or the inner key groove 502.

[0049] Among them Figure 3 and Figure 9 As shown, a guide slope 304 is provided at the inner edge of the outer fold 301 .

[0050] The distance between the rear cover edge 402 and the inner cylinder 4 is greater than the width of the screw sleeve 404 , and the difference is consistent with the elastic stroke of the disc spring 6 .

[0051] Among them Figure 2 and Figure 6 As shown, a plurality of anti-slip grooves or a plurality of protruding rods 406 are provided on the side surface of the screw sleeve 404 , and one end of the protruding rod 406 away from the screw sleeve 404 is located inside the outer hoop 3 .

[0052] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0053] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A long-life drum-type gear coupling, comprising a set of connecting parts, wherein the connecting parts are composed of an inner sleeve (1) and an outer gear sleeve (2), characterized in that: Also included is an outer hoop (3); An inner cylinder (4) is fixed to the end of the outer gear sleeve (2) of the connecting member, a plurality of outer keyways (401) are provided on the circumferential side of the inner cylinder (4), a rear cover edge (402) is fixed to the circumferential side of the other end of the outer gear sleeve (2), and a dense thread (403) is provided on the circumferential side of the outer gear sleeve (2) and at a position between the rear cover edge (402) and the inner cylinder (4); The outer thread of the dense thread (403) is connected to a threaded sleeve (404), and the threaded sleeve (404) is provided with a push ring (405) at one end close to the inner cylinder (4); The outer tooth sleeve (2) of the other connecting member is fixed with an outer cylinder (5) via a front cover edge (501), and the inner wall of the outer cylinder (5) is provided with a plurality of inner key grooves (502); The inner cylinder (4) is concentrically arranged in the outer cylinder (5), the end surface of the inner cylinder (4) is in contact with the inner wall of the front cover (501), and a cavity with one end open is formed between the inner cylinder (4) and the outer cylinder (5), and the push ring (405) is slidably arranged at one end of the cavity; A disc spring (6) and a friction member (7) are provided in the cavity and located between the front cover edge (501) and the push ring (405). The friction member (7) is composed of a plurality of first friction plates (701) and second friction plates (702) stacked in layers. The first friction plate (701) is provided with a first protrusion (703) slidably connected to the inner keyway (502) on its peripheral side surface. The second friction plate (702) is provided with a second protrusion (704) slidably connected to the outer keyway (401) on its inner wall. Both ends of the outer hoop (3) are provided with outer folding edges (301), and the outer hoop (3) is composed of a group of symmetrically arranged half-shell bodies (302). Both ends of the half-shell bodies (302) are provided with a group of supporting ears (303) on the outside. The two half-shell bodies (302) are fixed to the outside of the outer cylinder (5) through the supporting ears (303) and bolts, and the inner sides of the two outer folding edges (301) are respectively in contact with the outer side surfaces of the front cover edge (501) and the rear cover edge (402).

2. A long-life drum gear coupling according to claim 1, characterized in that: One end of the inner shaft sleeve (1) is located inside the outer gear sleeve (2) and is provided with an inner gear ring (101) meshing with the outer gear sleeve (2). A keyway (102) is provided on the inner wall of the inner shaft sleeve (1).

3. The long-life drum gear coupling according to claim 1, characterized in that: A limiting ring (201) is provided at one end of the outer gear sleeve (2) away from the outer hoop (3), and a gap is formed between the inner wall of the limiting ring (201) and the inner shaft sleeve (1).

4. The long-life drum gear coupling according to claim 1, characterized in that: The first friction plate (701) is composed of a group of symmetrically arranged semicircular ring plates (705), one of the ring plates (705) is provided with a notch (706) at both ends, and the other of the ring plates (705) is provided with a pin head (707) that is interference-fitted with the notch (706) at both ends. The structural features of the second friction plate (702) are consistent with the structural features of the first friction plate (701).

5. The long-life drum gear coupling according to claim 1, characterized in that: The outer diameter of the first friction plate (701) is consistent with the inner diameter of the outer cylinder (5), and a gap exists between the inner wall of the first friction plate (701) and the inner cylinder (4). A gap is formed between the outer diameter of the second friction plate (702) and the outer cylinder (5), and the inner diameter of the second friction plate (702) is consistent with the outer diameter of the inner cylinder (4).

6. The long-life drum gear coupling according to claim 1, characterized in that: The disc spring (6) is composed of a plurality of discs arranged in a stacked manner, and the discs are provided with an outer convex portion that cooperates with the outer keyway (401) or the inner keyway (502).

7. The long-life drum gear coupling according to claim 1, characterized in that: A guide slope (304) is provided at the inner edge of the outer folding edge (301).

8. The long-life drum gear coupling according to claim 1, characterized in that: The distance between the rear cover edge (402) and the inner cylinder (4) is greater than the width of the screw sleeve (404), and the difference is consistent with the elastic stroke of the disc spring (6).

9. The long-life drum gear coupling according to claim 1, characterized in that: The screw sleeve (404) is provided with a plurality of anti-slip grooves or a plurality of protruding rods (406) on the peripheral side surface thereof, and one end of the protruding rod (406) away from the screw sleeve (404) is located inside the outer hoop (3).

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