CN-122014765-A - Torque limiter and method of assembly

CN122014765ACN 122014765 ACN122014765 ACN 122014765ACN-122014765-A

Abstract

The invention relates to a torque limiter and an assembling method, the torque limiter comprises a connecting disc and a dual disc, the connecting disc comprises a first connecting disc and a second connecting disc, the dual disc is arranged between the first connecting disc and the second connecting disc, friction plates are arranged between the dual disc and the first connecting disc and/or between the dual disc and the second connecting disc, the dual disc is rotatably arranged relative to the connecting disc, a bolt piece is arranged between a mounting hole A of the first connecting disc and a mounting hole B of the second connecting disc in a penetrating way, an elastic washer is arranged on one end of the bolt piece, a combined locknut is arranged on the threaded end, and the combined locknut comprises a convex nut and a concave nut which are engaged in a concave-convex way.

Inventors

GE ZHENTAO
SUN GUANGTONG
Yu Shuangchao

Assignees

青岛盘古智能制造股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260403

Claims (10)

1. The torque limiter is characterized by comprising a connecting disc and a dual disc (3), wherein the connecting disc comprises a first connecting disc (1) and a second connecting disc (4); the dual disc (3) is arranged between the first connecting disc (1) and the second connecting disc (4); friction plates (2) are arranged between the dual disc (3) and the first connecting disc (1) and/or between the dual disc (3) and the second connecting disc (4); The dual disc (3) is rotatably arranged relative to the connecting disc; a bolt member (7) is arranged between the mounting hole A (22) of the first connecting disc (1) and the mounting hole B (21) of the second connecting disc (4) in a penetrating way; Positioning grooves (13) are distributed on the periphery of the first connecting disc (1).
2. A method for assembling a torque limiter is characterized by being used for assembling the torque limiter; The torque limiter comprises a connecting disc and a dual disc (3), wherein the connecting disc comprises a first connecting disc (1) and a second connecting disc (4); the dual disc (3) is arranged between the first connecting disc (1) and the second connecting disc (4); friction plates (2) are arranged between the dual disc (3) and the first connecting disc (1) and/or between the dual disc (3) and the second connecting disc (4); The dual disc (3) is rotatably arranged relative to the connecting disc; a bolt member (7) is arranged between the mounting hole A (22) of the first connecting disc (1) and the mounting hole B (21) of the second connecting disc (4) in a penetrating way; The assembly method comprises the following steps; S1, removing oil and dust, and cleaning a connecting disc and a dual disc (3); S2, a friction plate (2) is arranged on the connecting disc through a shear screw (5); S3, mounting a deformation shear pin (8) on the first connecting disc (1); S4, respectively mounting O-shaped rings B (10) on the first connecting disc (1) and the second connecting disc (4); S5, placing the dual disc (3) on the first connecting disc (1); in S2, after trial assembly, adapting and adjusting the thickness of an arc-shaped base plate B (18) or an arc-shaped base plate A (17) on the connecting disc; In S3, the first connecting disc (1) and the second connecting disc (4) are respectively thermally assembled with a deformation shear pin (8); s6, installing an O-shaped ring B (10) and installing a second connecting disc (4); s6, installing a bolt member (7) and fastening the combined locknut (23).
3. The method of assembling a torque limiter according to claim 2, characterized in that, when setting the torque calibration, the male nut (11) is tightened with the female nut (12) of the first coupling disc (1) by means of a torque wrench; Firstly, applying a tightening torque T to a bolt member (7) through a male nut (11) and a female nut (12) so as to generate radial pressure between a male outer cone table (27) and a female inner cone groove (26), thereby generating an axial pretightening force Fa; Fa=T/( k⋅d) ; Fa, axial pretightening force (N) of the bolt; t, the tightening torque (N.m) applied to the bolt; d, nominal diameter (m) of the bolt; torque coefficient (dimensionless); then, according to the mechanical decomposition of the conical surface, the axial force is amplified into radial clamping force: ; p, average radial pressure on the corresponding contact surface of the bolt and the connecting disc; n is the number of locking bolts; rm is the average radius of the conical surface, and is usually (D inner+D outer)/4, wherein D inner is the inner diameter of the sleeve, and D outer is the outer diameter (m) of the sleeve; The contact length (m) of the expansion sleeve and the shaft/hub; alpha is the half cone angle of the conical surface; ρ is the friction angle between the conical surfaces; Mu is the friction coefficient between the conical surfaces; in S6, installing a male nut (11) on the bolt member (7), then performing torque calibration, and beating a torque installation female nut (12); in S6, the process connection plate A (28) is pre-installed on the bolt piece (7), and the process connection plate B (29) on the second connection plate (4) is penetrated.
4. The torque limiter according to claim 3, wherein shearing holes (14) are respectively formed in the end surfaces of the first connecting disc (1) and the second connecting disc (4); The friction plate (2) is penetrated by a shear screw (5), and the shear screw (5) is arranged in a corresponding shear hole (14), and a deformation shear pin (8) is inserted between the first connecting disc (1) and the second connecting disc (4); the deformed shear pin (8) has a central through hole (19); side slots (20) communicated with the central through holes (19) are arranged on the side walls of the deformation shear pins (8).
5. The torque limiter according to claim 1, characterized in that the male nut (11) has a male external frustum (27); The female nut (12) is provided with a female inner cone groove (26) which is matched with the conical surface of the male outer cone table (27); the male outer cone table (27) and the female inner cone groove (26) are eccentrically arranged along the axial lead.
6. The torque limiter according to claim 1, characterized in that an O-ring B (10) is provided at the junction between the first connection disc (1) and the second connection disc (4); An O-ring A (9) is arranged between the joint surface of the first connecting disc (1) and the dual disc (3) and/or between the joint surface of the second connecting disc (4) and the dual disc (3).
7. The torque limiter according to claim 1, characterized in that a limit (41) for fixing the O-ring B (10) is provided on the first connection disc (1) and/or the second connection disc (4); A boss C (25) is arranged on the first connecting disc (1) and/or a boss B (24) is arranged on the second connecting disc (4) for fixing a corresponding O-shaped ring A (9); The friction plate (2) is positioned between the O-shaped ring B (10) and the O-shaped ring A (9).
8. The torque limiter according to claim 1, characterized in that an elastic washer (6) is provided on one end of the bolt member (7) and a combination locknut (23) is mounted on the threaded end; the combined locknut (23) comprises a convex nut (11) and a concave nut (12) which are engaged in a concave-convex manner.
9. Torque limiter according to claim 4 or 6, characterized in that an annular groove B (16) is provided on the first connecting disc (1); an annular groove A (15) is arranged on the second connecting disc (4); The grooves B (16) and/or the grooves A (15) are used for placing the friction plates (2); the bolt (7) is in tension fit with the mounting hole A (22) and/or the bolt (7) is in tension fit with the mounting hole B (21); Elastic Archimedes spring plates (36) are arranged on the plurality of bolt pieces (7) and/or elastic expansion sleeves are arranged on the plurality of bolt pieces (7).
10. The torque limiter according to claim 7, characterized in that in the groove B (16) is placed a pad B (18) for the arc; An arc backing plate A (17) is arranged in the groove A (15); the thickness of the arc line pad B (18) or the arc line pad A (17) is adjusted and assembled at present; A ring groove A (42) outside the first connecting disc (1); a process connection disc A (28) is arranged in the annular groove A (42); A process connection disc B (29) is arranged outside the second connection disc (4); The process receiving disc A (28) and the process receiving disc B (29) have the same structure; Bolt holes are distributed on the process receiving disc A (28) and are used for corresponding to the mounting holes A (22); An opening spring piece sleeve (30) is arranged in the process receiving disc A (28); the bolt piece (7) is sleeved on the opening elastic sheet sleeve (30); all the bolt pieces (7) are in tension fit with the corresponding process receiving disc A (28) and the corresponding process receiving disc B (29) through the opening elastic sheet sleeve (30); The opening elastic sheet sleeve (30) is provided with a step part (31) which is tightly matched with the neck part of the bolt piece (7); a step part (31) is provided with a process opening (32); The step part (31) is provided with a plurality of elastic claws (33); the end of the elastic claw (33) is provided with a foot (34); The middle section of the bolt piece (7) is provided with threads at the tail end; A side slot (35) is arranged on the bolt piece (7); the root connecting piece (37) of the Archimedes spring piece (36) is clamped in the side slot (35); the Archimedes spring piece (36) is provided with a first spring piece (38) and a second spring piece (39) which are divided by a process slot (40); The first elastic piece (38) and the second elastic piece (39) respectively correspond to the mounting hole A (22) and the mounting hole B (21); the mounting holes A (22) and the mounting holes B (21) are taper holes; the large end of the taper hole of the mounting hole A (22) is attached to the large end of the taper hole of the mounting hole B (21); the process connection plate B (29) is arranged between the male nut (11) and the female nut (12) or between the male nut (11) and the second connection plate (4).

Description

Torque limiter and method of assembly Technical Field The invention relates to a torque limiter and an assembly method. Background The torque limiter may be classified into an internal torque limiter and an external torque limiter according to whether it is integrated with the intermediate body. The external torque limiter is mainly installed on the friction disc in a riveting mode through the friction disc, friction disc materials are required to be vertically placed for installation, the efficiency is low, the first connecting disc and the second connecting disc are fixedly connected together in a mode of elastic pins, and the installation difficulty is high. The existing torque limiter is positioned at a high-speed rotation position, the anti-loosening is mainly focused on a safety index, and the traditional anti-loosening mode is to smear anti-loosening glue solution, but the anti-loosening glue solution is easy to lose efficacy under extremely cold working conditions, and is extremely inconvenient to detach when a friction plate is reworked or replaced. The conventional friction plate riveting installation has the defects of complex riveting process, high labor and time cost, high labor intensity, obvious noise and vibration, poor labor condition, high quality stability, high dependence on the technical level of operators, easy deformation (such as workpiece warping) and consistency, less flexible riveting in automation and field construction as in bolt connection, and the like. When the first connecting disc and the second connecting disc are installed, the screw thread glue is coated on the tail of the bolt by the nut, so that the efficiency is low, the disassembly is difficult, the problem that the torque condition cannot be checked due to the fact that the coating is leaked and the torque condition is leaked easily occurs in site construction is solved, and the effect is poor. The existing scheme relies on the friction disc to improve the friction force between the roughness increase and the friction disc, and has poor consistency of surface roughness and the problem of unbalanced rivet load. Disclosure of Invention The technical problems to be solved by the invention are to provide a torque limiter and an assembly method, which solve the problems that the friction plate is unreliable in fixation due to poor riveting installation consistency, rivets are sheared and cracked, and are difficult to disassemble, and when the first connecting disc and the second connecting disc are installed, a blind hole elastic pin design is adopted, so that accurate hole alignment and press mounting are required for hole installation operation. Meanwhile, when the first connecting disc and the second connecting disc are connected, after the bolts are screwed, nuts coated with the thread compound are required to be screwed again to prevent loosening, the thread compound cannot be solidified due to incomplete oil removal of the bolts, the bolts are loosened during actual operation, slipping torque is reduced, even the bolts fail, and the fan cannot normally operate to generate electricity. In order to solve the problems, the invention adopts the following technical scheme: In order to improve the anti-loosening effect, the torque limiter comprises a connecting disc and a dual disc, wherein the connecting disc comprises a first connecting disc and a second connecting disc; the dual disc is arranged between the first connecting disc and the second connecting disc; Friction plates are arranged between the dual disc and the first connecting disc and/or between the dual disc and the second connecting disc; The dual disc is rotatably arranged relative to the connecting disc; a bolt piece is arranged between the mounting hole A of the first connecting disc and the mounting hole B of the second connecting disc in a penetrating way; an elastic washer is arranged on one end of the bolt piece, and a combined locknut is arranged on the threaded end; The combined locknut comprises a convex nut and a concave nut which are engaged in a concave-convex manner. As a further improvement of the above technical scheme: in order to realize the anti-loosening effect, shearing holes are respectively arranged on the end surfaces of the first connecting disc and the second connecting disc; The friction plate is penetrated by a shearing screw which is arranged in a corresponding shearing hole, and a deformation shearing pin is inserted between the first connecting disc and the second connecting disc; the deformed shear pin has a central through hole; A side slot communicated with the central through hole is arranged on the side wall of the deformation shear pin. The male nut is provided with an outer frustum; The female nut is provided with a female inner cone groove which is matched with the conical surface of the male outer cone table; The male outer frustum and the female inner taper groove are eccentrically arranged. In order to achieve the s