Sealed disc-type friction reducer

Abstract

A sealed disc-type friction reducer, which belongs to the technical field of railway turnout switching apparatuses. The sealed disc-type friction reducer comprises a reducer part and a disc-type friction coupling part, wherein the reducer part comprises a reducer cover (2), an intermediate plate (3) and a reducer housing (4); the disc-type friction coupling part comprises a fixing chuck (7) and a grooved compression nut (8); the reducer cover (2), the intermediate plate (3), the reducer housing (4), the fixing chuck (7) and the grooved compression nut (8) are connected in sequence; an assembly mounting cavity is formed among the reducer cover (2), the intermediate plate (3), the reducer housing (4), the fixing chuck (7) and the grooved compression nut (8); an input shaft assembly (100), an output shaft assembly (200), a friction assembly and a compression spring (10) are arranged in the assembly mounting cavity; the output shaft assembly (200) transversely runs through the input shaft assembly (100) and is then connected to a load distribution plate (24); a fourth bearing (29), a reducer gear (18) and an inner gear (5) are arranged on the circumferential outer side of the input shaft assembly (100); the friction assembly is arranged on the right side of the inner gear (5); and the compression spring (10) is arranged in the reducer housing (4). The structure can overcome the shortcomings of reducers of existing electric switch machines, improve the sealing performance, and eliminate the impacts of environmental changes on the friction current of the reducer.

Description

Sealed disc type friction reducer TECHNICAL FIELD

[0001] The present application relates to the technical field of railway turnout conversion equipment, in particular to a sealed disc type friction reducer. BACKGROUND

[0002] The switch machine is an important signal foundation equipment for reliably converting the position of the turnout, changing the opening direction of the turnout, locking the turnout point rail, and reflecting the position of the turnout, which can well ensure the safety of train operation, improve the transportation efficiency, and improve the labor intensity of the train operation personnel.

[0003] The main function of the electric switch machine is to convert and lock the point rail and the center rail, change the opening direction of the turnout, and reflect the position state of the point rail and the center rail through the contact point, which is one of the important equipment for ensuring the efficient, safe and orderly operation of railway transportation.

[0004] At present, the reducer of some existing models of electric switch machines is realized by using the friction between the hub type friction belt and the extension end of the internal gear, which is mainly used for overload protection and torque transmission. When the conversion operation of the switch machine is blocked, the internal gear and the friction belt rotate relative to each other, and the energy output by the motor in the electric switch machine is consumed through mutual friction, so as to protect the motor and related parts. In addition, after the switch machine is normally converted to the position, the remaining inertia also needs to be absorbed by the relative sliding of the coupler on the reducer.

[0005] However, the reducer of the existing switch machine is greatly affected by the environmental temperature and air humidity during use, resulting in large fluctuation of the friction current of the reducer. If the friction current is too large, the overload protection function of the reducer will be lost, and the motor of the electric switch machine and related parts will be damaged. If the friction current is too small, the switch machine cannot normally convert the turnout.

[0006] It should be noted that the friction current of the reducer in the electric switch machine refers to the current consumed by the motor due to the friction caused by mechanical transmission when the motor of the switch machine rotates.

[0007] In addition, the existing friction belt (i.e. hub type friction belt) installed on the structure of the reducer wears out quickly and needs to be replaced regularly, which significantly increases the maintenance workload of the maintenance personnel.

[0008] Therefore, it is urgent to develop a technology that can solve the above technical problems of the reducer of the electric switch machine and improve the reliability and stability of the electric switch machine. SUMMARY

[0009] The purpose of the present application is to provide a sealed disc type friction reducer to solve the technical defects of the prior art.

[0010] To this end, the application provides a sealed disc friction reducer, comprising a reducer part and a disc friction coupler part connected with each other;

[0011] The reducer part comprises a reducer cover, an intermediate plate and a reducer shell;

[0012] The disc friction coupler part comprises a fixed chuck and a slot presser;

[0013] The reducer cover, the intermediate plate, the reducer shell, the fixed chuck and the slot presser are connected together in sequence from left to right;

[0014] The reducer cover, the intermediate plate, the reducer shell, the fixed chuck and the slot presser form an assembly mounting cavity therebetween;

[0015] The assembly mounting cavity is provided with an input shaft assembly and an output shaft assembly, as well as a friction group and a compression spring;

[0016] The output shaft assembly is connected with the load sharing plate after transversely penetrating through the input shaft assembly;

[0017] The circumferential outer side of the input shaft assembly is provided with a fourth bearing, a reducer gear and an inner gear distributed in sequence from left to right;

[0018] The right side of the inner gear is provided with the friction group;

[0019] The compression spring is arranged in the reducer shell;

[0020] The friction group comprises at least two outer friction plates and at least one inner friction plate;

[0021] The left and right sides of each inner friction plate are respectively provided with an outer friction plate;

[0022] The friction group is located at the right end of the output shaft assembly in the circumferential outer side direction.

[0023] Further, the input shaft assembly of the reducer part comprises a transversely distributed input shaft;

[0024] The right end outer side of the input shaft is sleeved with an eccentric sleeve and a third bearing;

[0025] The circumferential outer side of the eccentric sleeve is sleeved with a second bearing and a first bearing;

[0026] The second bearing, the first bearing and the third bearing are distributed in sequence from left to right;

[0027] The outer ring of the first bearing is sleeved with a first outer gear;

[0028] The outer ring of the second bearing is sleeved with a second outer gear;

[0029] A partition plate is arranged between the first and second outer gears;

[0030] and / or,

[0031] For the reducer part, an output shaft assembly is included, which is distributed transversely;

[0032] The left end of the output shaft is provided with a circular flat surface;

[0033] The circular flat surface is circumferentially provided with eight transversely penetrating roller mounting circular holes;

[0034] Each roller mounting circular hole is fixedly connected with the right end of a transversely distributed roller, respectively;

[0035] The middle circumferential outer wall of each roller is sleeved with a roller sleeve, respectively;

[0036] The middle and right ends of the output shaft are sleeved with two fifth bearings;

[0037] Each roller sleeve is arranged in a first circular hole on the first outer gear of the input shaft assembly and a second circular hole on the second outer gear;

[0038] and / or,

[0039] For the reducer part, the outer periphery of the speed reduction cover is provided with three protruding first shaft shoulders;

[0040] A first bolt mounting through hole is arranged on each first shaft shoulder;

[0041] The intermediate plate is arranged between the speed reduction cover and the speed reduction shell;

[0042] The outer periphery of the intermediate plate is provided with three protruding second shaft shoulders;

[0043] A second bolt mounting through hole is arranged on each second shaft shoulder;

[0044] and / or,

[0045] For the reducer part, the speed reduction shell includes a hollow speed reduction shell inner cavity;

[0046] The right end inner wall of the speed reduction shell inner cavity is arranged on the circumferential outer side of the annular circular surface of the inner gear;

[0047] The outer periphery of the speed reduction shell is provided with three protruding third shaft shoulders;

[0048] First and second threaded connection holes are arranged at the two ends of each third shaft shoulder, respectively;

[0049] The speed reduction cover, the intermediate plate, and the speed reduction shell are connected together by a third bolt.

[0050] Further, the left and right sides of the third bearing are respectively provided with a second shaft stop ring and a first shaft stop ring;

[0051] The second shaft stop ring is located between the first bearing and the third bearing;

[0052] The left side of the second bearing is provided with a large stop ring;

[0053] The second shaft stop ring, the first shaft stop ring and the large stop ring are all sleeved on the circumferential outer side of the input shaft.

[0054] Further, the circumferential outer side of the input shaft is sequentially provided with a first cylindrical surface, a second cylindrical surface and a third cylindrical surface from left to right;

[0055] The outer side of the first cylindrical surface is sleeved with a fourth bearing;

[0056] The right end of the third cylindrical surface is provided with a first clamping groove;

[0057] The first clamping groove is used for setting the first shaft stop ring;

[0058] The middle and left end of the third cylindrical surface are distributed with a transversely distributed long circular groove;

[0059] The inner ring of the third bearing is sleeved on the right end of the third cylindrical surface of the input shaft;

[0060] The outer ring of the third bearing is located in the second bearing mounting step hole in the output shaft of the output shaft assembly;

[0061] The long circular groove of the third cylindrical surface is provided with a transversely distributed long flat key;

[0062] The second cylindrical surface is distributed with a transversely distributed short circular groove;

[0063] The short flat key is arranged on the short circular groove of the second cylindrical surface;

[0064] The circumferential outer side of the third cylindrical surface is provided with an eccentric sleeve.

[0065] Further, the eccentric sleeve includes two eccentric cylindrical surfaces, which are a fourth cylindrical surface and a fifth cylindrical surface;

[0066] The circumferential outer surface of the right end of the fifth cylindrical surface is provided with a second clamping groove;

[0067] The second clamping groove is used for setting the second shaft stop ring;

[0068] The eccentric sleeve is provided with an eccentric sleeve circular cavity and a transversely distributed rectangular limiting groove;

[0069] The rectangular limiting groove is located on the inner wall of the eccentric sleeve circular cavity;

[0070] The third cylindrical surface of the input shaft transversely penetrates the eccentric sleeve circular cavity of the eccentric sleeve;

[0071] The third cylindrical surface is connected with the rectangular limiting groove through the long flat key arranged thereon;

[0072] And / or,

[0073] The center position of the first outer gear is transversely provided with a first circular cavity;

[0074] The first outer gear is uniformly provided with eight first circular holes transversely penetrating the annular plane;

[0075] The outer periphery of the first outer gear is provided with a circle of first teeth;

[0076] The outer ring of the first bearing is arranged on the first circular cavity of the first outer gear;

[0077] The inner ring of the first bearing is arranged on the fifth cylindrical surface of the eccentric sleeve, so that the first outer gear is linked with the eccentric sleeve;

[0078] And / or,

[0079] The center position of the second outer gear is transversely provided with a second circular cavity;

[0080] The second outer gear is uniformly provided with eight second circular holes transversely penetrating the annular plane;

[0081] The outer periphery of the second outer gear is provided with a circle of second teeth;

[0082] The outer ring of the second bearing is arranged on the second circular cavity of the second outer gear;

[0083] The inner ring of the second bearing is arranged on the fourth cylindrical surface of the eccentric sleeve, so that the second outer gear is linked with the eccentric sleeve.

[0084] Further, the right end of the roller is in interference fit with the roller mounting circular hole;

[0085] The roller and the roller sleeve are in clearance fit;

[0086] The middle part and the right end of the output shaft are provided with an output shaft cylindrical surface on the outer side in the circumferential direction;

[0087] Two fifth bearings are sleeved on the output shaft cylindrical surface;

[0088] The inner rings of the two fifth bearings are located on the output shaft cylindrical surface on the output shaft;

[0089] The outer rings of the two fifth bearings are located in the inner gear circular holes of the inner gear;

[0090] And / or,

[0091] For the reducer part, the reducer gear is sleeved on the input shaft of the input shaft assembly;

[0092] The central position of the reducer gear is provided with a middle cavity transversely through;

[0093] The input shaft of the input shaft assembly is placed in the middle cavity;

[0094] The middle cavity of the reducer gear is provided with a key groove;

[0095] The short key on the input shaft of the input shaft assembly is arranged in the key groove, so that the reducer gear is connected with the input shaft;

[0096] The first bearing mounting step hole is arranged on the reduction cover;

[0097] The first bearing mounting step hole is used for placing the fourth bearing;

[0098] The outer ring of the fourth bearing is placed in the reduction cover cavity on the inner side of the reduction cover;

[0099] The inner ring of the fourth bearing is sleeved on the input shaft of the input shaft assembly;

[0100] The position between the fourth bearing and the reducer gear is provided with a small check ring;

[0101] And / or,

[0102] For the reducer part, the central position of the equal load plate is provided with a central through hole distributed transversely;

[0103] Eight equal load plate through holes are uniformly arranged on the equal load plate in the circumferential direction;

[0104] The equal load plate through holes are arranged in correspondence with the first circular hole and the second circular hole on the input shaft assembly, and the roller mounting circular hole on the output shaft assembly;

[0105] The equal load plate is arranged on the eight rollers of the output shaft assembly through the eight equal load plate through holes;

[0106] The rollers on the output shaft assembly are sequentially through the first circular hole and the second circular hole from right to left, and the left end is connected with the equal load plate through hole on the equal load plate;

[0107] And / or,

[0108] For the reducer part, the central position of the inner gear is provided with an inner gear circular hole transversely through;

[0109] The inner wall of the left end of the inner gear circular hole of the inner gear is circumferentially provided with a ring of inner gear teeth;

[0110] The first teeth on the outer periphery of the first outer gear and the second teeth on the outer periphery of the second outer gear of the input shaft assembly are respectively engaged with the inner gear teeth;

[0111] The right end inner wall of the inner gear hole is provided with an inner gear clamping groove along the circumference;

[0112] A hole stop ring is arranged in the inner gear clamping groove of the inner gear;

[0113] Two fifth bearings on the output shaft assembly are arranged in the middle inner cavity of the inner gear hole of the inner gear;

[0114] An oil stop is arranged between the hole stop ring and the two fifth bearings of the output shaft assembly;

[0115] An oil-proof felt is arranged around the right side of the hole stop ring arranged on the inner gear;

[0116] An annular circular surface is arranged on the left end circumferential outer side of the inner gear;

[0117] A first O-ring mounting groove is arranged around the right side of the annular circular surface;

[0118] A first O-ring is arranged in the first O-ring mounting groove of the inner gear to realize sealing between the inner gear and the reduction shell;

[0119] Six inner friction plate clamping grooves are evenly distributed along the circumference on the right end circumferential outer side of the inner gear.

[0120] Further, the third bolt is sequentially threaded through the first bolt mounting through hole of the reduction cover and the second bolt mounting through hole on the middle plate from left to right, and is threadedly fixedly connected with the first threaded connection hole on the reduction shell;

[0121] And / or,

[0122] An annular third spring washer and an annular third flat washer are arranged on the third bolt;

[0123] And / or,

[0124] A reduction shell threaded hole is arranged on the reduction shell;

[0125] The carrying handle is connected with the reduction shell through the reduction shell threaded hole;

[0126] And / or,

[0127] A limiting groove and a reduction shell threaded connection hole are arranged on the top of the reduction shell;

[0128] The locking piece is fixedly connected with the reduction shell through the fourth bolt;

[0129] And / or,

[0130] The locking piece comprises a mounting edge;

[0131] The mounting edge is provided with a locking piece mounting groove;

[0132] The mounting edge of the locking piece is arranged on the limiting groove of the reduction shell;

[0133] The fourth bolt is threadedly fixedly connected with the reduction shell threaded connection hole on the reduction shell after penetrating through the locking piece mounting groove of the locking piece;

[0134] And / or,

[0135] The right side of the reduction shell is provided with a plurality of transversely penetrating compression spring mounting holes;

[0136] Each compression spring mounting hole is provided with a compression spring in the disc friction clutch part;

[0137] And / or,

[0138] For the disc friction clutch part, one compression spring is arranged in each compression spring mounting hole of the reduction shell;

[0139] The compression spring is in contact with the left side of the adjacent friction group;

[0140] The outer periphery of the fixed chuck is provided with three protruding fourth shaft shoulders;

[0141] One fixed chuck bolt mounting through hole is arranged on each fourth shaft shoulder;

[0142] Six outer friction plate clamping grooves are uniformly distributed on the inner cavity of the fixed chuck;

[0143] A first adjusting external thread is arranged on the outer peripheral cylindrical surface of the fixed chuck;

[0144] A second O-ring mounting groove is arranged on the fixed chuck;

[0145] A second O-ring is arranged on the second O-ring mounting groove of the fixed chuck;

[0146] The fixed chuck is fixedly connected with the reduction shell by three second bolts.

[0147] Furthermore, for the disc friction clutch part, six equally spaced outer friction plate protruding portions are circumferentially arranged on the outer side of each outer friction plate;

[0148] Six equally spaced inner friction plate protruding portions are circumferentially arranged on the inner side of the central through hole of each inner friction plate;

[0149] Not less than two outer friction plates and not less than one inner friction plate are alternately placed in the inner cavity of the fixed chuck and arranged on the right end circumferential outer side of the inner gear;

[0150] The inner gear is located in the inner cavity of the fixed chuck;

[0151] The outer protruding part of the outer friction plate is arranged in the outer friction plate clamping groove of the fixed chuck;

[0152] The inner friction plate inner protruding part of the inner friction plate is arranged in the inner friction plate clamping groove of the inner gear;

[0153] And / or,

[0154] The inner cavity of the groove pressing mother is provided with a second adjusting inner thread;

[0155] The groove pressing mother is threadedly fixedly connected with the first adjusting outer thread on the fixed chuck through the second adjusting inner thread on the groove pressing mother.

[0156] Further, the left and right sides of the inner friction plate are respectively provided with friction surfaces;

[0157] The friction surfaces are provided with radial distribution of the chip removal groove;

[0158] And / or,

[0159] The L-shaped sealing ring is arranged between the groove pressing mother and the fixed chuck, so as to realize the sealing between the groove pressing mother and the fixed chuck;

[0160] And / or,

[0161] The inner cavity of the groove pressing mother is provided with an inner cavity step;

[0162] The inner cavity step is provided with a thrust bearing;

[0163] The groove pressing mother is provided with a step hole distributed transversely and penetratingly;

[0164] The step hole is provided with a dustproof ring, so as to realize the sealing between the groove pressing mother and the output shaft in the output shaft group;

[0165] And / or,

[0166] The outer periphery of the groove pressing mother is uniformly provided with a plurality of rectangular clamping grooves;

[0167] The right side surface of the groove pressing mother is uniformly distributed with six radially distributed rectangular protrusions along the circumferential direction;

[0168] One end of the locking piece connected to the top of the reduction shell is provided with a locking nail;

[0169] The locking nail is arranged in any rectangular clamping groove on the outer periphery of the groove pressing mother;

[0170] And / or,

[0171] The outer periphery of the reduction cover is provided with a protruding part in the upper part;

[0172] The raised part is provided with a threaded mounting hole;

[0173] The raised part is provided with a threaded mounting hole;

[0174] The oil injection label is fixedly connected with the raised part on the speed reducer cover through the first screw;

[0175] And / or,

[0176] Four rivet mounting holes are transversely arranged on the speed reducer cover;

[0177] A nameplate is arranged on the left side of the speed reducer cover;

[0178] The nameplate is provided with a nameplate mounting through hole corresponding to each rivet mounting hole;

[0179] The nameplate is fixedly connected with the speed reducer cover through four rivets;

[0180] The rivet passes through the nameplate mounting through hole on the nameplate and is fixedly connected with the position corresponding rivet mounting hole.

[0181] Further, the speed reducer gear is engaged with the original motor gear in the external electric switch machine;

[0182] The speed reducer cover has a motor docking hole;

[0183] The output shaft of the original motor in the electric switch machine is provided with a motor gear at the right end portion after transversely penetrating the motor docking hole;

[0184] The motor gear is engaged with the speed reducer gear;

[0185] The number of teeth of the speed reducer gear is greater than that of the motor gear.

[0186] As can be seen from the technical solutions provided by the present application, compared with the prior art, the present application provides a sealed disc type friction speed reducer, which is designed scientifically and can overcome the shortcomings of the existing speed reducer in the electric switch machine. The present application improves the sealing type of the product by adopting multiple sealing designs, eliminates the influence of environmental changes (such as changes in environmental temperature and air humidity) on the friction current of the speed reducer, improves the stability and reliability of the switch machine speed reducer, and further improves the overall stability and reliability of the switch machine, which has great production practical significance.

[0187] In addition, the present application adopts the working mode of mutual friction of the inner friction plate and the outer friction plate, which solves the defect of fast wear of the existing friction belt (i.e. hub type friction belt), improves the stability and reliability of the speed reducer, and fully meets the safety and high efficiency requirements of the switch machine in the running process. BRIEF DESCRIPTION OF DRAWINGS

[0188] Fig. 1a is a perspective view of a sealed disc friction reducer according to the present application;

[0189] Fig. 1b is a sectional view of a sealed disc friction reducer according to the present application;

[0190] Fig. 2 is a left side view of a sealed disc friction reducer according to the present application;

[0191] Fig. 3 is an exploded view of a sealed disc friction reducer according to the present application;

[0192] Fig. 4 is a perspective view of a reducer cover according to the present application;

[0193] Fig. 5 is a perspective view of a reducer gear according to the present application;

[0194] Fig. 6a is a perspective view of an inner gear according to the present application;

[0195] Fig. 6b is a sectional view of an inner gear according to the present application;

[0196] Fig. 7a is a perspective view of a reducer housing according to the present application;

[0197] Fig. 7b is a perspective view of a reducer housing according to the present application;

[0198] Fig. 8 is a perspective view of a locking piece according to the present application;

[0199] Fig. 9a is an axial sectional view of an input shaft set according to the present application;

[0200] Fig. 9b is a perspective view of an input shaft according to the present application;

[0201] Fig. 9c is a perspective view of an eccentric sleeve according to the present application;

[0202] Fig. 9d is a perspective view of a first outer gear according to the present application;

[0203] Fig. 9e is a perspective view of a second outer gear according to the present application;

[0204] Figure 10 is a schematic diagram of the assembly structure of the output shaft of the sealed disc friction reducer provided by the present application;

[0205] Figure 11a is a schematic diagram of the side structure of the fixed chuck of the sealed disc friction reducer provided by the present application;

[0206] Figure 11b is a sectional view of the fixed chuck of the sealed disc friction reducer provided by the present application;

[0207] Figure 12 is a schematic diagram of the side structure of the outer friction plate of the sealed disc friction reducer provided by the present application;

[0208] Figure 13 is a schematic diagram of the side structure of the inner friction plate of the sealed disc friction reducer provided by the present application;

[0209] Figure 14a is a schematic diagram of the side structure of the groove presser of the sealed disc friction reducer provided by the present application;

[0210] Figure 14b is a sectional view of the groove presser of the sealed disc friction reducer provided by the present application;

[0211] In the figure: 1- inner friction plate, 2- reduction cover, 3- intermediate plate, 4- reduction shell, 5- inner gear; 6- output shaft, 7- fixed chuck, 8- groove pressure mother, 9- outer friction plate, 10- compression spring; 11- locking piece, 12- locking nail, 13- L-shaped sealing ring, 14- small check ring, 15- large check ring; 16- nameplate, 171- first outer gear, 172- second outer gear, 18- reducer gear, 19- eccentric sleeve, 20- roller; 2000- reduction cover cavity, 201- first bearing installation step hole, 202- first bolt installation through hole; 203- threaded installation hole; 204- rivet installation hole; 21- roll sleeve, 22- oil dam, 23- input shaft, 24- uniform load plate, 25- isolation plate; 26- oil-proof felt, 27- oil injection label, 28- third bearing, 29- fourth bearing; 30- fifth bearing; 301- second bolt installation through hole, 311- first bearing, 312- second bearing, 32- thrust bearing, 33- first O-shaped ring, 34- second O-shaped ring, 35- dustproof ring; 36- first shaft check ring, 37- second shaft check ring, 38- hole check ring, 39- short flat key; 40- long flat key, 41- first screw, 42- second bolt, 43- third bolt, 44- fourth bolt, 45- third flat washer; 46- first spring washer, 47- third spring washer, 48- fourth spring washer, 49- rivet, 50- fourth flat washer; 51- carrying handle, 100- input shaft assembly, 200- output shaft group, 300- motor butt joint hole; 101- inner friction plate inner protruding part, 102- chip removal groove; 401- limiting groove, 402- reduction shell threaded connection hole, 403- third shaft shoulder, 404- reduction shell inner cavity, 405- reduction shell threaded hole, 406- compression spring installation hole, 407- bottom shell connection hole; 501- annular round surface, 502- oil-proof felt installation groove, 503- inner friction plate clamping groove, 504- inner gear teeth, 505- inner gear round hole, 506- inner gear clamping groove, 507- first O-shaped ring installation groove; 701- fixed chuck bolt installation through hole, 702- outer friction plate clamping groove, 703- second O-shaped ring installation groove, 704- first adjusting external thread; 801- rectangular clamping groove, 802- rectangular protrusion, 803- second adjusting internal thread, 805- step, 807- inner cavity step; 901- outer protruding part; 1101- locking piece installation groove, 1102- moving edge, 1103- installation edge; 1711- first round hole, 1712- first teeth, 1713- first circular cavity; 1721- second round hole, 1722- second teeth, 1723- second circular cavity; 1801- intermediate cavity, 1802- key groove, 1803- third teeth; 1901- eccentric sleeve circular cavity, 1902- rectangular limiting groove, 1903- second clamping groove, 1904- fourth cylindrical surface, 1905- fifth cylindrical surface;2001 - output shaft cylindrical surface, 2002 - circular flat surface, 2003 - roller mounting round hole, 2004 - second bearing mounting step hole; 2301 - first cylindrical surface, 2302 - second cylindrical surface, 2303 - third cylindrical surface, 2304 - first clamping groove; 2401 - load distribution plate through hole; 4031 - first threaded connection hole, 4032 - second threaded connection hole. DETAILED DESCRIPTION

[0212] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0213] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0214] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For those skilled in the art, the specific meaning of the above terms in the present patent can be understood according to the specific circumstances.

[0215] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0216] Referring to FIG. 1a to FIG. 1b, FIG. 2 to FIG. 5, FIG. 6a to FIG. 6b, FIG. 7a to FIG. 7b, FIG. 8, FIG. 9a to FIG. 9e, FIG. 10, FIG. 11a to FIG. 11b, FIG. 12 to FIG. 13, FIG. 14a to FIG. 14b, the present application provides a sealed disc friction reducer, and the present application provides a sealed disc friction reducer, which is a sealed disc friction reducer for electric switch machine, comprising a reducer (i.e. planetary gear reducer) part and a disc friction coupling part connected with each other;

[0217] Among them, the reducer part includes a reducer cover 2, an intermediate plate 3 and a reducer shell 4;

[0218] The disc friction coupling part includes a fixed chuck 7 and a groove pressing mother 8;

[0219] The reducer cover 2, the intermediate plate 3, the reducer shell 4, the fixed chuck 7 and the groove pressing mother 8 are connected together from left to right in turn;

[0220] The reducer cover 2, the intermediate plate 3, the reducer shell 4, the fixed chuck 7 and the groove pressing mother 8 form an assembly mounting cavity between them;

[0221] In the assembly mounting cavity, an input shaft assembly 100 and an output shaft assembly 200, as well as a friction group and a compression spring 10 are arranged;

[0222] The output shaft assembly 200 is connected with the load sharing plate 24 after transversely penetrating through the input shaft assembly 100;

[0223] The circumferential outer side of the input shaft assembly 100 is circumferentially provided with a fourth bearing 29, a reducer gear 18 and an inner gear 5 distributed from left to right in turn;

[0224] The right side of the inner gear 5 is provided with the friction group;

[0225] The compression spring 10 is arranged in the reducer shell 4;

[0226] The friction group includes at least two outer friction plates 9 and at least one inner friction plate 1;

[0227] Each inner friction plate 1 has an outer friction plate 9 on the left and right sides respectively;

[0228] The friction group is located at the right end of the circumferential outer side of the output shaft assembly 200.

[0229] It should be noted that for the present application, the reducer part specifically includes a reducer cover 2, a fourth bearing 29, a reducer gear 18, an intermediate plate 3, a load sharing plate 24, an input shaft assembly 100, an output shaft assembly 200, an inner gear 5, a first O-ring 33 and a reducer shell 4 and other components;

[0230] It should be noted that for the present application, the disc type friction clutch part specifically includes: compression spring 10, second O-ring 34, fixed chuck 7, outer friction plate 9, inner friction plate 1, thrust bearing 32, L-shaped sealing ring 13, groove pressing mother 8, dustproof ring 35 and other components.

[0231] In the present application, referring to FIGS. 1b, 3, 9a-9e, for the speed reducer part, the input shaft assembly 100 includes a transversely distributed input shaft 23;

[0232] The right end of the outer side of the input shaft 23 is sleeved with an eccentric sleeve 19 and a third bearing 28;

[0233] The circumferential outer side of the eccentric sleeve 19 is sleeved with a second bearing 312 and a first bearing 311;

[0234] The second bearing 312, the first bearing 311 and the third bearing 28 are sequentially distributed from left to right;

[0235] The outer ring of the first bearing 311 is sleeved with a first outer gear 171;

[0236] The outer ring of the second bearing 312 is sleeved with a second outer gear 172;

[0237] An isolation plate 25 is arranged between the first outer gear 171 and the second outer gear 172;

[0238] Specifically, the left and right sides of the third bearing 28 are respectively provided with a second shaft stop ring 37 and a first shaft stop ring 36;

[0239] The second shaft stop ring 37 is located between the first bearing 311 and the third bearing 28;

[0240] A large stop ring 15 is arranged on the left side of the second bearing 312;

[0241] The second shaft stop ring 37, the first shaft stop ring 36 and the large stop ring 15 are all sleeved on the circumferential outer side of the input shaft 23.

[0242] Further, the circumferential outer side of the input shaft 23 is sequentially provided with a first cylindrical surface 2301, a second cylindrical surface 2302 and a third cylindrical surface 2303 from left to right;

[0243] The outer side of the first cylindrical surface 2301 is sleeved with a fourth bearing 29;

[0244] The right end of the third cylindrical surface 2303 is provided with a first clamping groove 2304;

[0245] The first clamping groove 2304 is used for arranging the first shaft stop ring 36;

[0246] The middle and left end of the third cylindrical surface 2303 is provided with a transversely distributed long circular groove;

[0247] The inner ring of the third bearing 28 is sleeved on the right end of the third cylindrical surface 2303 of the input shaft 23;

[0248] The outer ring of the third bearing 28 is located in the second bearing mounting step hole 2004 in the output shaft 6 of the output shaft assembly 200;

[0249] The long circular groove of the third cylindrical surface 2303 is provided with a transversely distributed long flat key 40;

[0250] The second cylindrical surface 2302 is provided with a transversely distributed short circular groove;

[0251] The short flat key 39 is arranged on the short circular groove of the second cylindrical surface 2302;

[0252] The third cylindrical surface 2303 is provided with an eccentric sleeve 19 on the outer side in the circumferential direction.

[0253] Further, the eccentric sleeve 19 includes two eccentric cylindrical surfaces, namely the fourth cylindrical surface 1904 and the fifth cylindrical surface 1905;

[0254] The right end of the fifth cylindrical surface 1905 is provided with a second clamping groove 1903 around the outer surface in the circumferential direction;

[0255] The second clamping groove 1903 is used to arrange the second shaft stop ring 37;

[0256] The eccentric sleeve 19 is provided with an eccentric sleeve circular cavity 1901 and a transversely distributed rectangular limiting groove 1902;

[0257] The rectangular limiting groove 1902 is located on the inner wall of the eccentric sleeve circular cavity 1901;

[0258] The third cylindrical surface 2303 of the input shaft 23 transversely passes through the eccentric sleeve circular cavity 1901 of the eccentric sleeve 19;

[0259] The third cylindrical surface 2303 is connected (i.e., key connection) with the rectangular limiting groove 1902 through the long flat key 40 arranged thereon, thereby realizing linkage;

[0260] Further, the center position of the first outer gear 171 is transversely provided with a first circular cavity 1713;

[0261] The first outer gear 171 is uniformly provided with eight first circular holes 1711 transversely passing through the annular plane;

[0262] The outer periphery of the first outer gear 171 is provided with a ring of first teeth 1712 (specifically 41);

[0263] The outer ring of the first bearing 311 is arranged on the first circular cavity 1713 of the first outer gear 171;

[0264] The inner ring of the first bearing 311 is arranged on the fifth cylindrical surface 1905 of the eccentric sleeve 19, so that the first outer gear 171 is linked with the eccentric sleeve 19.

[0265] Further, the center position of the second outer gear 172 is arranged with a second circular cavity 1723 which is transversely penetrated;

[0266] The second outer gear 172 is uniformly arranged with eight second circular holes 1721 which are transversely penetrated on the annular plane;

[0267] The outer periphery of the second outer gear 172 is arranged with a circle of second teeth 1722 (specifically 41);

[0268] The outer ring of the second bearing 312 is arranged on the second circular cavity 1723 of the second outer gear 172;

[0269] The inner ring of the second bearing 312 is arranged on the fourth cylindrical surface 1904 of the eccentric sleeve 19, so that the second outer gear 172 is linked with the eccentric sleeve 19.

[0270] In the present application, referring to FIG. 1b, FIG. 3 and FIG. 10, for the speed reducer part, the output shaft assembly 200 includes the transversely distributed output shaft 6;

[0271] The left end of the output shaft 6 is arranged with a circular plane 2002;

[0272] The circular plane 2002 is circumferentially and annularly arranged with eight transversely penetrated roller mounting circular holes 2003;

[0273] Each roller mounting circular hole 2003 is fixedly connected with the right end of one of the transversely distributed rollers 20;

[0274] The middle circumferential outer wall of each roller 20 is respectively sleeved with one roller sleeve 21;

[0275] The middle and right end circumferential outer sides of the output shaft 6 are sleeved with two fifth bearings 30;

[0276] Each roller sleeve 21 is arranged in the first circular hole 1711 on the first outer gear 171 of the input shaft assembly 100 and the second circular hole 1721 on the second outer gear 172;

[0277] Specifically, the roller mounting circular hole 2003 is in interference fit with the right end of the roller 20.

[0278] The roller 20 is in clearance fit with the roller sleeve 21.

[0279] It needs to be explained that the eight rollers 20 are fixed in the roller mounting round holes 2003 on the output shaft 6 in interference fit.

[0280] It needs to be explained that the roller sleeve 21 rotates around the roller 20 in work, and the two are gap fit.

[0281] Specifically, the middle part and the right end of the output shaft 6 have an output shaft cylindrical surface 2001 on the outer side in the circumferential direction.

[0282] The output shaft cylindrical surface 2001 is sleeved with two fifth bearings 30.

[0283] The inner rings of the two fifth bearings 30 are located on the output shaft cylindrical surface 2001 on the output shaft 2.

[0284] The outer rings of the two fifth bearings 30 are located in the inner gear hole 505 of the internal gear 5.

[0285] In the present application, referring to FIGS. 1b, 3, and 5, for the speed reducer part, the speed reducer gear 18 is sleeved on the input shaft 23 of the input shaft assembly 100.

[0286] Specifically, the central position of the speed reducer gear 18 is provided with a middle cavity 1801 transversely through.

[0287] The input shaft 23 of the input shaft assembly 100 is placed in the middle cavity 1801.

[0288] The middle cavity 1801 of the speed reducer gear 18 is provided with a key groove 1802.

[0289] The short flat key 39 on the input shaft 23 of the input shaft assembly 100 is arranged in the key groove 1802, so that the speed reducer gear 18 is linked with the input shaft 23.

[0290] Specifically, referring to FIGS. 1b and 4, the first bearing mounting step hole 201 is arranged on the speed reducer cover 2.

[0291] The first bearing mounting step hole 201 is used to place the fourth bearing 29.

[0292] The outer ring of the fourth bearing 29 is placed in the speed reducer cover cavity 2000 on the inner side of the speed reducer cover 2.

[0293] The inner ring of the fourth bearing 29 is sleeved on the input shaft 23 of the input shaft assembly 100 (specifically, it is sleeved on the first cylindrical surface 2301 on the left end of the input shaft 23 of the input shaft assembly 100).

[0294] Further, referring to FIG. 1b, a small check ring 14 is arranged between the fourth bearing 29 and the speed reducer gear 18.

[0295] In the present application, for the speed reducer part, referring to Fig. 3, the center position of the uniform load plate 24 is provided with a transversely distributed center through hole;

[0296] Eight uniform load plate through holes 2401 are uniformly arranged on the uniform load plate 24 along the circumference;

[0297] The uniform load plate through hole 2401 is arranged in correspondence with the first circular hole 1711 and the second circular hole 1721 on the input shaft assembly 100, and the roller mounting circular hole 2003 on the output shaft assembly 200;

[0298] The uniform load plate 24 is arranged on the eight rollers 20 of the output shaft assembly 200 through the eight uniform load plate through holes 2401;

[0299] Specifically, the roller 20 on the output shaft assembly 200, from right to left, penetrates through the first circular hole 1711 and the second circular hole 1721, and the left end is connected with the uniform load plate through hole 2401 on the uniform load plate 24.

[0300] It should be noted that for the present application, the input shaft assembly 100 is used to place the eight rollers 21 on the output shaft assembly 200 through the eight first circular holes 1711 on the first outer gear 171 and the eight second circular holes 1721 on the second outer gear 172, so that the input shaft assembly 100 drives the output shaft assembly 200 to link.

[0301] In the present application, referring to Figs. 6a and 6b, for the speed reducer part, the center position of the inner gear 5 is provided with an inner gear circular hole 505 (i.e. a center through hole) transversely penetrating;

[0302] The left end inner wall of the inner gear circular hole 50 of the inner gear 5 is circumferentially provided with a ring of inner gear teeth 504 (specifically 42 inner gear teeth 504);

[0303] The first teeth 1712 on the outer periphery of the first outer gear 171 and the second teeth 1722 on the outer periphery of the second outer gear 172 of the input shaft assembly 100 are respectively connected with the inner gear teeth 504.

[0304] It should be noted that for the present application, the input shaft assembly 100 is linked with the inner gear teeth 504 of the inner gear 5 through the first teeth 1712 of the first outer gear 171 and the second teeth 1722 of the second outer gear 172.

[0305] Specifically, the right end inner wall of the inner gear circular hole 505 is circumferentially provided with an inner gear clamping groove 506;

[0306] Referring to Fig. 1b, the hole retaining ring 38 is arranged in the inner gear slot 506 of the inner gear 5;

[0307] The two fifth bearings 30 on the output shaft assembly 200 are arranged in the middle inner cavity of the inner gear circular hole 505 of the inner gear 5;

[0308] Further, the oil dam 22 is arranged between the hole retaining ring 38 and the two fifth bearings 30 of the output shaft assembly 200;

[0309] Further, the oil-proof felt 26 is arranged on the right side of the hole retaining ring 38 arranged on the inner gear 5;

[0310] The right end of the inner gear 5 is circumferentially provided with a ring of oil-proof felt mounting grooves 502;

[0311] The oil-proof felt mounting groove 502 is provided with an annular oil-proof felt 26.

[0312] Further, the left end of the inner gear 5 is circumferentially provided with an annular circular surface 501;

[0313] The right side of the annular circular surface 501 is circumferentially provided with a first O-ring mounting groove 507;

[0314] The first O-ring 33 is arranged in the first O-ring mounting groove 507 of the inner gear 5, so as to realize the sealing between the inner gear 5 and the reduction shell 4;

[0315] Further, the right end of the inner gear 5 is circumferentially and evenly distributed with six inner friction plate clamping grooves 503;

[0316] In the present application, referring to Fig. 1b and Fig. 4, for the reducer part, the outer periphery of the reduction cover 2 is provided with three protruding first shaft shoulders;

[0317] Each first shaft shoulder is provided with a first bolt mounting through hole 202;

[0318] The intermediate plate 3 is arranged between the reduction cover 2 and the reduction shell 4;

[0319] Referring to Fig. 3, the outer periphery of the intermediate plate 3 is provided with three protruding second shaft shoulders;

[0320] Each second shaft shoulder is provided with a second bolt mounting through hole 301;

[0321] In the present application, referring to Fig. 3, Fig. 7a and Fig. 7b, for the reducer part, the reduction shell 4 comprises a hollow reduction shell inner cavity 404;

[0322] The right end inner wall of the reduction shell inner cavity 404 is arranged on the circumferential outer side of the annular circular surface 501 of the inner gear 5;

[0323] The outer periphery of the reduction shell 4 is provided with three protruding third shaft shoulders 403;

[0324] The two ends of each third shaft shoulder 403 are respectively provided with a first threaded connection hole 4031 and a second threaded connection hole 4032;

[0325] The reduction cover 2, the intermediate plate 3, and the reduction shell 4 are connected together through the third bolt 43;

[0326] Specifically, the third bolt 43 sequentially penetrates the first bolt mounting through hole 202 of the reduction cover 2 and the second bolt mounting through hole 301 of the intermediate plate 3 from left to right, and is threadedly fixedly connected with the first threaded connection hole 4031 of the reduction shell 4.

[0327] Specifically, the third bolt 43 is provided with an annular third spring washer 47 and an annular third flat washer 45;

[0328] Specifically, the reduction shell 4 is provided with a reduction shell threaded hole 405;

[0329] The carrying handle 51 is connected with the reduction shell 4 through the reduction shell threaded hole 405;

[0330] Further, the end of the carrying handle 51 is threadedly fixedly connected with the reduction shell threaded hole 405.

[0331] Specifically, the top of the reduction shell 4 is provided with a limiting groove 401 and a reduction shell threaded connection hole 402;

[0332] The locking piece 11 is fixedly connected with the reduction shell 4 through the fourth bolt 44;

[0333] Further, the locking piece 11 includes a mounting edge 1103;

[0334] The mounting edge 1103 is provided with a locking piece mounting groove 1101;

[0335] The mounting edge 1103 of the locking piece 11 is arranged on the limiting groove 401 of the reduction shell 4;

[0336] The fourth bolt 44 penetrates through the locking piece mounting groove 1101 of the locking piece 11 and is threadedly fixedly connected with the reduction shell threaded connection hole 402 of the reduction shell 4.

[0337] Further, the fourth bolt 44 is provided with an annular fourth spring washer 48 and an annular fourth flat washer 50.

[0338] Specifically, the right side of the reduction shell 4 is provided with a plurality of spring mounting holes 406 transversely penetrating;

[0339] In each compression spring mounting hole 406, a compression spring 10 is arranged.

[0340] In the present application, referring to Figs. 3, 11a and 11b, for the disc friction clutch part, a compression spring 10 is arranged in each compression spring mounting hole 406 of the reduction shell 4, respectively.

[0341] The compression spring 10 contacts the left side of the adjacent friction group (specifically, the left side of the adjacent inner friction plate 1 or outer friction plate 9).

[0342] The outer periphery of the fixed chuck 7 is provided with three protruding fourth shaft shoulders.

[0343] A fixed chuck bolt mounting through hole 701 is arranged on each fourth shaft shoulder.

[0344] Six outer friction plate clamping grooves 702 are evenly distributed on the inner cavity of the fixed chuck 7.

[0345] A first adjusting external thread 704 is arranged on the outer peripheral cylindrical surface of the fixed chuck 7.

[0346] A second O-ring mounting groove 703 is arranged on the fixed chuck 7.

[0347] A second O-ring 34 is arranged on the second O-ring mounting groove 703 of the fixed chuck 7.

[0348] It should be noted that the second O-ring 34 is used to realize the sealing between the fixed chuck 7 and the reduction shell 4.

[0349] Specifically, the fixed chuck 7 is fixedly connected with the reduction shell 4 through three second bolts 42.

[0350] Further, the second bolt 42 is threadedly fixedly connected with the corresponding second threaded connection hole 4032 on the reduction shell 4 after passing through the fixed chuck threaded mounting through hole 701 of the fixed chuck 7.

[0351] Further, an annular third spring washer 47 is arranged on the second bolt 42.

[0352] In the present application, referring to Figs. 3, 12 and 13, for the disc friction clutch part, six outer friction plate protruding portions 901 are circumferentially arranged at equal intervals on the outer side of each outer friction plate 9.

[0353] Six inner friction plate protruding portions 101 are circumferentially arranged at equal intervals on the inner side of the central through hole of each inner friction plate 1.

[0354] More than two outer friction plates 9 and more than one inner friction plate 1 are alternately placed in the inner cavity of the fixed chuck 7 and are arranged on the right end of the inner gear 5;

[0355] The inner gear 5 is located in the inner cavity of the fixed chuck 7;

[0356] Specifically, the outer protruding part 901 of the outer friction plate 9 is arranged in the outer friction plate clamping groove 702 of the fixed chuck 7;

[0357] The inner friction plate inner protruding part 101 of the inner friction plate 1 is arranged in the inner friction plate clamping groove 503 of the inner gear 5;

[0358] It should be noted that the six inner friction plate clamping grooves 503 on the right end of the inner gear 5 are connected to the six inner friction plate inner protruding parts 101 on the inner friction plate 1, for example, embedded connection.

[0359] It should be noted that the outer protruding part 901 of the outer friction plate 9 and the outer friction plate clamping groove 702 of the fixed chuck 7 are transitionally matched; the inner friction plate inner protruding part 101 and the inner friction plate clamping groove 503 of the inner gear 5 are transitionally matched.

[0360] It should be noted that the inner friction plate 1 is sintered with copper-based powder metallurgy material on the inner steel sheet, which has good wear resistance and stability. The outer friction plate 9 is made of stainless steel material to avoid rust caused by environmental factors, which changes the friction coefficient.

[0361] Specifically, the inner friction plate 1 has friction surfaces on the left and right sides;

[0362] The friction surface is provided with a radial distribution of the chip removal groove 102;

[0363] It should be noted that the chip removal groove 102 is arranged at the friction material part of the inner friction plate 1, which can remove the powder generated on the friction surface and reduce the change of the friction coefficient caused by the powder.

[0364] In the present application, referring to FIG. 3, FIG. 14a and FIG. 14b, for the disc type friction coupling part, the inner cavity of the groove pressing female 8 is provided with a second adjusting inner thread 803;

[0365] The groove pressing female 8 is threadedly fixedly connected with the first adjusting outer thread 704 on the fixed chuck 7 through the second adjusting inner thread 803 thereon;

[0366] Specifically, an L-shaped sealing ring 13 is arranged between the groove pressing female 8 and the fixed chuck 7 to realize the sealing between the groove pressing female 8 and the fixed chuck 7;

[0367] Specifically, the inner cavity of the groove pressing female 8 is provided with an inner cavity step 807;

[0368] The inner cavity step 807 is provided with a thrust bearing 32;

[0369] The groove pressing female 8 is provided with step holes 805 distributed transversely and penetratingly;

[0370] The step holes 805 are provided with dustproof rings 35, which are used to realize the sealing between the groove pressing female 8 and the output shaft 6 in the output shaft set 200;

[0371] Specifically, the outer periphery of the groove pressing female 8 is uniformly provided with a plurality of rectangular clamping grooves 801;

[0372] The right side surface of the groove pressing female 8 is uniformly distributed with six radially distributed rectangular protrusions 80 along the circumference;

[0373] One end of the locking piece 11 connected to the top of the reduction shell 4 is provided with a locking nail 12;

[0374] The locking nail 12 is arranged in any rectangular clamping groove 801 on the outer periphery of the groove pressing female 8.

[0375] In the present application, as shown in FIG. 4, the outer periphery of the reduction cover 2 is provided with a protruding part at the upper part;

[0376] The protruding part is provided with a threaded mounting hole 203 (i.e. an internal threaded hole);

[0377] The upper part of the protruding part is provided with an oil injection label 27;

[0378] The oil injection label 27 is fixedly connected with the protruding part of the reduction cover 2 through a first screw 41;

[0379] Specifically, the oil injection label 27 is provided with a screw through hole at a position corresponding to the threaded mounting hole 203.

[0380] The first screw 41 is threadedly fixedly connected with the threaded mounting hole 203 of the reduction cover 2 corresponding in position after penetrating through the screw through hole of the oil injection label 27.

[0381] Specifically, the first screw 41 is sleeved with an annular first spring washer 46.

[0382] In the present application, as shown in FIG. 2 and FIG. 4, four rivet mounting holes 204 are arranged transversely and penetratingly on the reduction cover 2;

[0383] The left side of the reduction cover 2 is provided with a nameplate 16;

[0384] The nameplate 16 is respectively provided with a nameplate mounting through hole at a position corresponding to each rivet mounting hole 204;

[0385] The nameplate 16 is fixedly connected with the reduction cover 2 through four rivets 49.

[0386] The rivet 49 is fixedly connected (specifically, riveted) with the rivet mounting hole 204 corresponding to the position through the nameplate mounting hole on the nameplate 16.

[0387] In the present application, specifically, the reducer gear 18 is engaged with the original motor gear in the electric switch machine (for example, the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.) located outside;

[0388] Specifically, as shown in FIG. 2, the motor docking hole 300 is provided on the speed reducer cover 2;

[0389] The output shaft of the original motor in the electric switch machine (for example, the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.) is provided with a motor gear at the right end portion after transversely penetrating the motor docking hole 300;

[0390] The motor gear is engaged with the reducer gear 18;

[0391] Further, the number of teeth of the reducer gear 18 is greater than the number of teeth of the motor gear.

[0392] It should be noted that for the present application, the friction reducer of the present application is a sealed disc type friction reducer for electric switch machine, which comprises a planetary gear reducer and a disc type friction clutch. The planetary gear reducer and the disc type friction clutch are installed together. Under normal circumstances, the reducer amplifies and transmits the motor torque to the switch machine main shaft, and when the turnout conversion encounters resistance, the friction clutch operates, protecting the switch machine and the turnout from being damaged. The friction pair of the disc type friction reducer is sealed in the housing, which can avoid the influence of condensate water, oil stains, dust and other pollutants on the stability of the friction clutch, reduce the bounce of the switch machine contact due to unstable switch machine friction current, and avoid affecting the efficiency of railway transportation.

[0393] Based on the design of the present application, the friction reducer of the present application is a sealed disc type friction reducer for electric switch machine, which can amplify torque, transmission torque and overload protection through speed reduction.

[0394] In order to more clearly understand the technical scheme of the present application, the working principle of the reducer part of the friction reducer of the present application for realizing speed reduction and amplifying torque and transmission torque is described below.

[0395] The original motor in the electric switch machine (for example, ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.) is fixed on the sealing type disc friction reducer provided by the application, the motor gear installed on the motor is engaged with the reducer gear 18 in the sealing type disc friction reducer provided by the application, and the output shaft 6 in the output shaft group 200 of the sealing type disc friction reducer provided by the application is connected with the original transmission structure (for example, gear and rack mechanism) in the electric switch machine (for example, through key connection, and the specific connection mode can directly adopt the connection mode between the output shaft in the existing friction reducer and the transmission structure, which will not be described here).

[0396] In normal operation, when the motor of the electric switch machine is connected to the power supply, the motor rotates counterclockwise at high speed, the motor gear drives the reducer gear 18 of the sealing type disc friction reducer provided by the application to rotate clockwise, and since the number of teeth of the reducer gear 18 is greater than the number of teeth of the motor gear, the first stage reduction of the sealing type disc friction reducer provided by the application is realized.

[0397] Then, after the rotation of the reducer gear 18 of the sealing type disc friction reducer provided by the application, the reducer gear 18 drives the input shaft 23 installed thereon to rotate clockwise through the short flat key 39, the input shaft 23 drives the eccentric sleeve 19 to rotate clockwise through the long flat key 40 installed thereon, and the eccentric sleeve 19 drives the first outer gear 171 and the second outer gear 172 to do trochoidal rotation through the first bearing 311 and the second bearing 312 installed thereon.

[0398] Under normal circumstances, the inner gear 5 is "fixed" by the friction effect of the friction clutch. The inner gear 5 is provided with the first outer gear 171 and the second outer gear 172, and the inner gear teeth 504 of the inner gear 5 are engaged with the first gear teeth 1712 of the first outer gear 171 and the second gear teeth 1722 of the second outer gear 172. The first outer gear 171 and the second outer gear 172 are provided with eight circular holes, and a roller 20 with a roller sleeve 21 inserted into each circular hole is fixed on the output shaft 6.

[0399] When the input shaft 23 rotates one circle, the first outer gear 171 and the second outer gear 172 also do one circle eccentric motion. The first outer gear 171 and the second outer gear 172 have 41 teeth, and the inner gear 5 has 42 tooth grooves, with a difference of one tooth. Therefore, when the first outer gear 171 and the second outer gear 172 do one circle eccentric motion, the teeth of the first outer gear 171 and the second outer gear 172 are misaligned by one tooth in the inner gear 5.

[0400] In normal circumstances, the inner gear 5 is stationary, forcing the outer gear (including the first outer gear 171 and the second outer gear 172) to rotate in the opposite direction by one tooth in a week of eccentric movement. When the input shaft 23 rotates 41 clockwise, the outer gear rotates 1 clockwise, driving the output shaft 6 to rotate 1 counterclockwise, thus completing the second stage of speed reduction. At the same time, the output shaft 6 is connected to the transmission mechanism (such as a gear and rack mechanism) of the switch machine. After the reducer double machine reduces the output torque of the motor, it is amplified through the transmission mechanism to push the corresponding rod in the electric switch machine to move. The rod of the electric switch machine is connected to the turnout, thereby completing the conversion of the turnout.

[0401] In order to more clearly understand the technical solutions of the present application, the working principle of the disc type friction clutch part of the friction reducer for realizing overload protection is described below.

[0402] For the sealed disc type friction reducer provided by the present application, regarding the disc type friction clutch part, the inner friction plate 1 is fixed on the inner gear 5 through the inner friction plate inner protruding part 101; the outer friction plate 9 of the reducer is fixed on the fixed chuck 7 through the outer friction plate outer protruding part 901, the fixed chuck 7 is fixed on the reducer shell 4 through the second bolt 42, and the reducer shell 4 is fixed on the bottom shell of the switch machine through the original fastening bolt of the electric switch machine.

[0403] Not less than one set of outer friction plates 9 and inner friction plates 1 are alternately placed and fixed on the fixed chuck 7 and the inner gear 5, and the fixed chuck 7 and the inner gear 5 are connected together through the friction group composed of the outer friction plates 9 and the inner friction plates 1. A plurality of compression springs 10 are arranged between the friction group composed of the outer friction plates 9 and the inner friction plates 1 and the reducer shell 4, and the fixed chuck 7 and the groove compression mother 8 are connected through adjusting threads (the groove compression mother 8 is fixedly connected with the first adjusting outer thread 704 on the fixed chuck 7 through the second adjusting inner thread 803 thereon).

[0404] If the groove compression mother 8 is tightened, the friction group composed of the outer friction plates 9 and the inner friction plates 1 compresses the compression spring 10, the pressure F1 between the friction groups increases, and when the friction coefficient f of the friction group is constant, the friction force F between the friction groups is F1*f, so the friction force of the friction group composed of the outer friction plates 9 and the inner friction plates 1 increases.

[0405] If the groove compression mother 8 is loosened, the compression spring 10 between the friction group composed of the outer friction plates 9 and the inner friction plates 1 and the reducer shell 4 is released, the pressure F1 between the friction groups decreases, and the friction force of the friction group composed of the outer friction plates 9 and the inner friction plates 1 decreases.

[0406] Therefore, when the groove pressing nut 8 of the sealed disc type friction reducer of the application is tightened, the friction force of the friction group composed of the outer friction plate 9 and the inner friction plate 1 is increased, and when the groove pressing nut 8 of the sealed disc type friction reducer of the application is loosened, the friction force of the friction group composed of the outer friction plate 9 and the inner friction plate 1 is reduced. In this way, the inner gear 5 and the fixed chuck 7 can be connected together through the friction force of the friction group composed of the outer friction plate 9 and the inner friction plate 1.

[0407] In the normal operation of the sealed disc type friction reducer of the application, the inner gear 5 needs to be fixed to realize torque transmission, and then drive the transmission mechanism (for example, a gear and rack mechanism) of the electric switch machine to switch the turnout. That is, the outer friction plate 9 and the inner friction plate 1 do not slide relative to each other, so it is necessary to adjust the tightening degree of the groove pressing nut 8 and the fixed chuck 7, and adjust the friction force between the outer friction plate 9 and the inner friction plate 1 by adjusting the compression amount of the compression spring 10.

[0408] When the turnout is blocked and cannot be normally switched, the original transmission mechanism of the electric switch machine is blocked and cannot move, at this time, the output shaft 6 in the sealed disc type friction reducer of the application connected with the original transmission mechanism of the electric switch machine is blocked and cannot move. At this time, the original motor of the electric switch machine is still rotating at high speed, the motor gear drives the reducer gear 18 of the sealed disc type friction reducer of the application to rotate, the reducer gear 18 drives the input shaft 23 installed thereon to rotate through the short flat key 39, the input shaft 23 drives the eccentric sleeve 19 to rotate through the long flat key 40 installed thereon, the eccentric sleeve 19 drives the first outer gear 171 and the second outer gear 172 to do cycloid rotation through the first bearing 311 and the second bearing 312 installed thereon, because the output shaft 6 is fixed, the roller 20 fixed to the output shaft 6 is also fixed, the first outer gear 171 and the second outer gear 172 drive the inner gear 5 to rotate, the inner gear 5 drives the inner friction plate 1 installed thereon to rotate in the process of rotating, the fixed chuck 7 is fixed to the original bottom shell of the electric switch machine through the reduction shell 4, the outer friction plate 9 installed on the fixed chuck 7 is fixed, at this time, the inner friction plate 1 and the outer friction plate 9 slide relative to each other, and then consume the power of the motor of the electric switch machine, protect the original motor of the electric switch machine from being burned out, and realize the overload protection function of the sealed disc type friction reducer provided by the application.

[0409] In the application, it needs to be pointed out that the friction force between the inner friction plate 1 and the outer friction plate 9 of the ZD6 sealed disc type friction reducer cannot be adjusted too large or too small.

[0410] If the friction force between the inner friction plate 1 and the outer friction plate 9 is adjusted too large, when the turnout is blocked and cannot be normally switched, the energy of the motor cannot be absorbed through the relative sliding of the inner friction plate 1 and the outer friction plate 9, which may burn the motor and damage other parts;

[0411] If the friction between the inner friction plate 1 and the outer friction plate 9 is adjusted too small, the inner gear 5 cannot be kept still by the friction between the inner friction plate 1 and the outer friction plate 9, resulting in failure to switch the turnout.

[0412] It should be noted that the electric switch machine (for example, ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.) adopts a DC motor, and the friction current of the switch machine reducer (i.e. the current of the DC motor when the inner friction plate 1 and the outer friction plate 9 slide relative to each other) is linearly related to the friction between the inner friction plate 1 and the outer friction plate 9, that is, the friction current increases in proportion to the increase of the friction, and the friction current decreases in proportion to the decrease of the friction. Since the friction current is easy to measure, the friction between the inner friction plate 1 and the outer friction plate 9 is usually monitored by measuring the friction current of the electric switch machine reducer.

[0413] In the present application, in order to prevent the change of the rotation degree of the fixed chuck 8 due to vibration or other abnormal factors after the adjustment of the friction current of the friction reducer matched with the electric switch machine (for example, ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.), and further cause the fluctuation of the friction current of the ZD6 switch machine reducer, a plurality of rectangular clamping grooves 801 are arranged on the fixed chuck 8, and a locking piece 11 is installed on the reducer shell 4. After the adjustment of the friction current of the electric switch machine reducer, the locking nail 12 is clamped into any one of the rectangular clamping grooves 801 on the outer periphery of the fixed chuck 8 by adjusting the position of the locking piece installation groove 1101 on the locking piece 11.

[0414] In the present application, in order to facilitate the adjustment of the friction current of the friction reducer matched with the electric switch machine (for example, ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.), a plurality of rectangular protrusions 802 are arranged on the fixed chuck 8. By clamping any one of the rectangular protrusions 802 on the fixed chuck 8 with a live wrench, the friction current of the sealing type disc friction reducer matched with the existing electric switch machine can be conveniently adjusted by tightening and loosening the fixed chuck 8.

[0415] Compared with the prior art, the friction reducer provided by the present application has the following beneficial effects:

[0416] 1. The friction reducer provided by the present application is a reducer matched with the existing electric switch machine (for example, ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.), which is a sealing type disc friction reducer and can replace the ZD6 type reducer on the existing electric switch machine.

[0417] 2、The friction reducer of the present application adopts the inner and outer friction plates with more wear resistance and more stable friction coefficient to replace the original friction band (such as the hub type friction band), which greatly reduces the wear of the friction material and reduces the maintenance workload of the maintenance personnel;

[0418] 3、The friction reducer of the present application realizes the sealing between the inner gear 5 and the reduction shell 4 by arranging the first O-shaped ring 33 on the inner gear 5, which prevents the oil dirt from entering the working area of the inner and outer friction plates and causing the change of the friction current;

[0419] 4、The present application realizes the sealing between the fixed chuck 7 and the reduction shell 4 by arranging the second O-shaped ring 34 on the fixed chuck 7, which prevents the moisture in the working environment from entering the working area of the inner and outer friction plates;

[0420] 5、The present application realizes the sealing between the fixed chuck 7 and the groove pressing mother 8 by arranging the L-shaped sealing ring between the groove pressing mother 8 and the fixed chuck 7, which prevents the moisture in the working environment from entering the working area of the inner and outer friction plates;

[0421] 6、The present application realizes the sealing between the groove pressing mother 8 and the output shaft 6 by arranging the dustproof ring 35 on the groove pressing mother 8, which prevents the moisture in the working environment from entering the working area of the inner and outer friction plates.

[0422] 7、It has been proved in practice that the present application is designed scientifically, which effectively eliminates the influence of the change of the working environment on the friction current and improves the overall reliability of the electric switch machine.

[0423] In summary, compared with the prior art, the sealed disc type friction reducer provided by the present application has a scientific structure design, which can overcome the shortcomings of the existing reducer, solve the influence of the change of the working environment on the friction current, replace the friction band (such as the hub type friction band) of the existing reducer with the inner and outer friction plates, effectively reduce the wear between the friction pairs, and be conducive to improving the stability and reliability of the switch machine, meeting the safety and high efficiency requirements during the operation of the switch machine.

[0424] The friction reducer provided by the present application is a sealed disc type friction reducer, which is applied to an electric switch machine and has the advantages of stable structure, exquisite and ingenious appearance, and convenient operation.

[0425] The above description is only the preferred embodiments of the present application, and it should be pointed out that those skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

A sealed disc type friction reducer, characterized by The device comprises a reducer part and a disc friction clutch part connected with each other; The reducer part comprises a reducer cover (2), an intermediate plate (3) and a reducer shell (4); The disc friction clutch part comprises a fixed chuck (7) and a groove pressing mother (8); The reducer cover (2), the intermediate plate (3), the reducer shell (4), the fixed chuck (7) and the groove pressing mother (8) are sequentially connected from left to right; The reducer cover (2), the intermediate plate (3), the reducer shell (4), the fixed chuck (7) and the groove pressing mother (8) form an assembly installation cavity; An input shaft assembly (100) and an output shaft assembly (200) and a friction group and a compression spring (10) are arranged in the assembly installation cavity; The output shaft assembly (200) is connected with the load distribution plate (24) after transversely penetrating through the input shaft assembly (100); A fourth bearing (29), a reducer gear (18) and an inner gear (5) are sequentially arranged on the circumferential outer side of the input shaft assembly (100) from left to right; The friction group is arranged on the right side of the inner gear (5); The compression spring (10) is arranged in the reducer shell (4); The friction group comprises at least two outer friction plates (9) and at least one inner friction plate (1); Each inner friction plate (1) has one outer friction plate (9) on the left side and the right side respectively; The friction group is located on the right end of the output shaft assembly (200) in the circumferential outer side direction. The friction reducer of claim 1 wherein For the reducer part, the input shaft assembly (100) comprises a transversely distributed input shaft (23); An eccentric sleeve (19) and a third bearing (28) are sleeved on the right end outer side of the input shaft (23); A second bearing (312) and a first bearing (311) are sleeved on the circumferential outer side of the eccentric sleeve (19); The second bearing (312), the first bearing (311) and the third bearing (28) are sequentially arranged from left to right; A first outer gear (171) is sleeved on the outer ring of the first bearing (311); A second outer gear (172) is sleeved on the outer ring of the second bearing (312); An isolation plate (25) is arranged between the first outer gear (171) and the second outer gear (172); And / or, For the reducer part, the output shaft assembly (200) comprises a transversely distributed output shaft (6); A circular plane (2002) is arranged on the left end of the output shaft (6); Eight transversely penetrating roller mounting circular holes (2003) are circumferentially arranged on the circular plane (2002); Each roller mounting circular hole (2003) is fixedly connected with the right end of one transversely distributed roller (20); A roller sleeve (21) is sleeved on the middle circumferential outer wall of each roller (20); Two fifth bearings (30) are sleeved on the middle and right end circumferential outer side of the output shaft (6); Each roller sleeve (21) is arranged in a first circular hole (1711) on the first outer gear (171) and a second circular hole (1721) on the second outer gear (172) of the input shaft assembly (100); And / or, Three protruding first shaft shoulders are arranged on the outer periphery of the reducer cover (2). A first bolt mounting through hole (202) is arranged on each first shaft shoulder; The intermediate plate (3) is arranged between the reduction cover (2) and the reduction shell (4); Three protruding second shaft shoulders are arranged on the outer periphery of the intermediate plate (3); A second bolt mounting through hole (301) is arranged on each second shaft shoulder; And / or, For the reduction gear part, the reduction shell (4) comprises a hollow reduction shell inner cavity (404); The inner wall of the right end of the reduction shell inner cavity (404) is arranged on the circumferential outer side of the annular circular surface (501) of the ring gear (5); The outer periphery of the reduction shell (4) is provided with three protruding third shaft shoulders (403); First and second threaded connection holes (4031) and (4032) are respectively arranged at the two ends of each third shaft shoulder (403); The reduction cover (2), the intermediate plate (3) and the reduction shell (4) are connected together through the third bolt (43). The friction reducer of claim 2 wherein Second and first shaft retaining rings (37) and (36) are respectively arranged on the left and right sides of the third bearing (28); The second shaft retaining ring (37) is located between the first bearing (311) and the third bearing (28); A large retaining ring (15) is arranged on the left side of the second bearing (312); The second shaft retaining ring (37), the first shaft retaining ring (36) and the large retaining ring (15) are all sleeved on the circumferential outer side of the input shaft (23). The friction reducer of claim 3 wherein A first, second and third cylindrical surface (2301), (2302) and (2303) are sequentially arranged on the circumferential outer side of the input shaft (23) from left to right; The fourth bearing (29) is sleeved on the outer side of the first cylindrical surface (2301); A first clamping groove (2304) is arranged at the right end of the third cylindrical surface (2303); The first clamping groove (2304) is used for arranging the first shaft retaining ring (36); A transversely distributed long circular groove is distributed on the middle and left end of the third cylindrical surface (2303); The inner ring of the third bearing (28) is sleeved on the right end of the third cylindrical surface (2303) of the input shaft (23); The outer ring of the third bearing (28) is located in the second bearing mounting stepped hole (2004) in the output shaft (6) of the output shaft assembly (200); A transversely distributed long flat key (40) is arranged on the long circular groove of the third cylindrical surface (2303); A transversely distributed short circular groove is distributed on the second cylindrical surface (2302); A transversely distributed short flat key (39) is arranged on the short circular groove of the second cylindrical surface (2302); An eccentric sleeve (19) is arranged on the circumferential outer side of the third cylindrical surface (2303). The friction reducer of claim 2 wherein The eccentric sleeve (19) comprises two eccentric cylindrical surfaces, i.e. a fourth cylindrical surface (1904) and a fifth cylindrical surface (1905); A second clamping groove (1903) is circumferentially arranged on the right end circumferential outer surface of the fifth cylindrical surface (1905); The second clamping groove (1903) is used for arranging the second shaft retaining ring (37); An eccentric sleeve circular cavity (1901) and a transversely distributed rectangular limiting groove (1902) are arranged on the eccentric sleeve (19). The oblong limiting groove (1902) is located on the inner wall of the eccentric sleeve circular cavity (1901); The third cylindrical surface (2303) of the input shaft (23) transversely penetrates the eccentric sleeve circular cavity (1901) of the eccentric sleeve (19); The third cylindrical surface (2303) is connected with the oblong limiting groove (1902) through the long flat key (40) arranged thereon; And / or, The center of the first outer gear (171) is transversely provided with a first circular cavity (1713); The first outer gear (171) is uniformly provided with eight first circular holes (1711) transversely penetrating the annular plane; A circle of first teeth (1712) is arranged on the outer periphery of the first outer gear (171); The outer ring of the first bearing (311) is arranged on the first circular cavity (1713) of the first outer gear (171); The inner ring of the first bearing (311) is arranged on the fifth cylindrical surface (1905) of the eccentric sleeve (19), so that the first outer gear (171) is linked with the eccentric sleeve (19); And / or, The center of the second outer gear (172) is transversely provided with a second circular cavity (1723); The second outer gear (172) is uniformly provided with eight second circular holes (1721) transversely penetrating the annular plane; A circle of second teeth (1722) is arranged on the outer periphery of the second outer gear (172); The outer ring of the second bearing (312) is arranged on the second circular cavity (1723) of the second outer gear (172); The inner ring of the second bearing (312) is arranged on the fourth cylindrical surface (1904) of the eccentric sleeve (19), so that the second outer gear (172) is linked with the eccentric sleeve (19). The friction reducer as set forth in claim 2, wherein The roll bar mounting circular hole (2003) is in interference fit with the right end of the roll bar (20); The roll bar (20) is in clearance fit with the roll sleeve (21); The middle and right end of the output shaft (6) are provided with an output shaft cylindrical surface (2001) on the outer side in the circumferential direction; Two fifth bearings (30) are sleeved on the output shaft cylindrical surface (2001); The inner rings of the two fifth bearings (30) are located on the output shaft cylindrical surface (2001) of the output shaft (2); The outer rings of the two fifth bearings (30) are located in the inner gear circular hole (505) of the inner gear (5); And / or, For the speed reducer part, the speed reducer gear (18) is sleeved on the input shaft (23) of the input shaft assembly (100); The center of the speed reducer gear (18) is transversely provided with an intermediate cavity (1801); The input shaft (23) of the input shaft assembly (100) is placed in the intermediate cavity (1801); A key groove (1802) is arranged on the intermediate cavity (1801) of the speed reducer gear (18); The short flat key (39) on the input shaft (23) of the input shaft assembly (100) is arranged in the key groove (1802), so that the speed reducer gear (18) is linked with the input shaft (23); A first bearing mounting step hole (201) is arranged on the speed reducer cover (2); The first bearing mounting step hole (201) is used for placing the fourth bearing (29); The outer ring of the fourth bearing (29) is placed in the reduction cover cavity (2000) inside the reduction cover (2); The inner ring of the fourth bearing (29) is sleeved on the input shaft (23) of the input shaft assembly (100); The position between the fourth bearing (29) and the reduction gear (18) is provided with a small check ring (14); And / or, For the reduction gear part, the center position of the equalizing plate (24) is provided with a center through hole distributed transversely; Eight equalizing plate through holes (2401) are evenly arranged on the equalizing plate (24) along the circumference; The equalizing plate through holes (2401) are arranged in correspondence with the first circular hole (1711) and the second circular hole (1721) on the input shaft assembly (100) and the roller mounting circular hole (2003) on the output shaft assembly (200); The equalizing plate (24) is arranged on the eight rollers (20) of the output shaft assembly (200) through the eight equalizing plate through holes (2401); The left end of the roller (20) on the output shaft assembly (200) is connected with the equalizing plate through hole (2401) on the equalizing plate (24) after penetrating through the first circular hole (1711) and the second circular hole (1721) from right to left in sequence; And / or, For the reduction gear part, the center position of the inner gear (5) is transversely provided with an inner gear circular hole (505); The left end inner wall of the inner gear circular hole (50) of the inner gear (5) is circumferentially provided with a ring of inner gear teeth (504); The first teeth (1712) on the outer circumference of the first outer gear (171) and the second teeth (1722) on the outer circumference of the second outer gear (172) of the input shaft assembly (100) are respectively connected with the inner gear teeth (504); The right end inner wall of the inner gear circular hole (505) is circumferentially provided with an inner gear clamping groove (506); A hole stop ring (38) is arranged in the inner gear clamping groove (506) of the inner gear (5); The two fifth bearings (30) of the output shaft assembly (200) are arranged in the middle inner cavity of the inner gear circular hole (505) of the inner gear (5); An oil dam (22) is arranged between the hole stop ring (38) and the two fifth bearings (30) of the output shaft assembly (200); An oilproof felt (26) is circumferentially arranged on the right side of the hole stop ring (38) arranged on the inner gear (5); An annular circular surface (501) is arranged on the left end circumferential outer side of the inner gear (5); A first O-ring mounting groove (507) is circumferentially arranged on the right side of the annular circular surface (501); A first O-ring (33) is arranged in the first O-ring mounting groove (507) of the inner gear (5), so as to realize the sealing between the inner gear (5) and the reduction shell (4); Six inner friction plate clamping grooves (503) are evenly distributed on the right end circumferential outer side of the inner gear (5) along the circumference. The friction reducer as set forth in claim 2, wherein The third bolt (43) is sequentially threaded through the first bolt mounting through hole (202) of the reduction cover (2) and the second bolt mounting through hole (301) of the middle plate (3) from left to right, and is threadedly fixedly connected with the first threaded connection hole (4031) of the reduction shell (4); And / or, The third bolt (43) is provided with an annular third spring washer (47) and an annular third flat washer (45); And / or, The reduction shell (4) is provided with a reduction shell threaded hole (405); The carrying handle (51) is connected with the reduction shell (4) through the reduction shell threaded hole (405); And / or, The top of the reduction shell (4) is provided with a limiting groove (401) and a reduction shell threaded connection hole (402); The locking piece (11) is fixedly connected with the reduction shell (4) through the fourth bolt (44); And / or, The locking piece (11) comprises a mounting edge (1103); The mounting edge (1103) is provided with a locking piece mounting groove (1101); The mounting edge (1103) of the locking piece (11) is arranged on the limiting groove (401) of the reduction shell (4); The fourth bolt (44) is fixedly connected with the reduction shell threaded connection hole (402) on the reduction shell (4) after penetrating through the locking piece mounting groove (1101) of the locking piece (11); And / or, The right side of the reduction shell (4) is provided with a plurality of transversely penetrating compression spring mounting holes (406); Each compression spring mounting hole (406) is provided with a compression spring (10) having one of the disc friction coupler parts; And / or, For the disc friction coupler part, one compression spring (10) is arranged in each compression spring mounting hole (406) of the reduction shell (4); The compression spring (10) is in contact with the left side of the adjacent friction group; The outer periphery of the fixed chuck (7) is provided with three protruding fourth shaft shoulders; Each fourth shaft shoulder is provided with a fixed chuck bolt mounting through hole (701); The inner cavity of the fixed chuck (7) is uniformly distributed with six outer friction plate clamping grooves (702); The outer peripheral cylindrical surface of the fixed chuck (7) is provided with a first adjusting external thread (704); The fixed chuck (7) is provided with a second O-ring mounting groove (703); The second O-ring (34) is arranged on the second O-ring mounting groove (703) of the fixed chuck (7); The fixed chuck (7) is fixedly connected with the reduction shell (4) through three second bolts (42). The friction reducer as set forth in claim 2, wherein For the disc friction coupler part, the outer side of the periphery of each outer friction plate (9) is circumferentially provided with six outer friction plate outer protrusions (901) distributed at equal intervals; The inner side of the central through hole of each inner friction plate (1) is circumferentially provided with six inner friction plate inner protrusions (101) distributed at equal intervals; Not less than two outer friction plates (9) and not less than one inner friction plate (1) are alternately placed in the inner cavity of the fixed chuck (7) and arranged on the right end of the outer side of the inner gear (5) in the circumferential direction; The inner gear (5) is located in the inner cavity of the fixed chuck (7); The outer protrusion (901) of the outer friction plate (9) is correspondingly arranged in the outer friction plate clamping groove (702) of the fixed chuck (7); The inner friction plate inner protrusion (101) of the inner friction plate (1) is correspondingly arranged in the inner friction plate clamping groove (503) of the inner gear (5); And / or, For the disc friction coupler part, the inner cavity of the groove pressing female (8) is provided with a second adjusting internal thread (803); The groove pressing female (8) is threadedly connected with the first adjusting external thread (704) on the fixed chuck (7) through the second adjusting internal thread (803) on the groove pressing female (8). The friction reducer as set forth in claim 8, wherein The inner friction plate (1) has friction surfaces on the left and right sides thereof; The friction surfaces are provided with radial distribution of chip removal grooves (102); And / or, An L-shaped sealing ring (13) is arranged between the groove pressing female (8) and the fixed chuck (7) to realize sealing between the groove pressing female (8) and the fixed chuck (7); And / or, The inner cavity of the groove pressing female (8) is provided with an inner cavity step (807); The inner cavity step (807) is provided with a thrust bearing (32); The groove pressing female (8) is provided with a step hole (805) distributed transversely and penetratingly; The step hole (805) is provided with a dustproof ring (35) to realize sealing between the groove pressing female (8) and the output shaft (6) in the output shaft group (200); And / or, A plurality of rectangular clamping grooves (801) are uniformly arranged on the outer periphery of the groove pressing female (8); Six radially distributed rectangular protrusions (802) are uniformly distributed on the right side surface of the groove pressing female (8) along the circumferential direction; The top of the reduction shell (4) is provided with a locking nail (12) at one end of the locking sheet (11) connected thereto; The locking nail (12) is arranged in any one of the rectangular clamping grooves (801) on the outer periphery of the groove pressing female (8); And / or, The outer periphery of the reduction cover (2) is provided with a protruding part; The protruding part is provided with a threaded mounting hole (203); The upper part of the protruding part is provided with an oil injection label (27); The oil injection label (27) is fixedly connected with the protruding part of the reduction cover (2) through a first screw (41); And / or, Four rivet mounting holes (204) are transversely and penetratingly arranged on the reduction cover (2); The left side of the reduction cover (2) is provided with a nameplate (16); The nameplate (16) is provided with a nameplate mounting through hole at a position corresponding to each rivet mounting hole (204); The nameplate (16) is fixedly connected with the reduction cover (2) through four rivets (49); The rivet (49) passes through the nameplate mounting through hole on the nameplate (16) and is fixedly connected with the position corresponding rivet mounting hole (204). The friction reducer according to any one of claims 1 to 9, wherein The reducer gear (18) is engaged with the original motor gear in the external electric switch machine; The reduction cover (2) has a motor butt joint hole (300); The output shaft of the original motor in the electric switch machine is provided with a motor gear at the right end portion after transversely and penetratingly passing through the motor butt joint hole (300); The motor gear is engaged with the reducer gear (18); The number of teeth of the reducer gear (18) is greater than the number of teeth of the motor gear.

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