Sealed disc type friction speed reducer

Abstract

The utility model discloses a sealed disc type friction speed reducer. The sealed disc type friction speed reducer comprises a speed reducer part and a disc type friction coupler part, the speed reducer part comprises a speed reducing cover, a middle plate and a speed reducing shell; the disc type friction coupler part comprises a fixed chuck and a groove pressing nut; the speed reduction cover, the middle plate, the speed reduction shell, the fixing chuck and the groove pressing nut are sequentially connected. An assembly mounting cavity is formed among the speed reducing cover, the middle plate, the speed reducing shell, the fixed chuck and the groove pressing nut; an input shaft assembly, an output shaft assembly, a friction group and a pressure spring are arranged in the assembly mounting cavity; the output shaft assembly transversely penetrates through the input shaft assembly and then is connected with the uniform loading plate. A fourth bearing, a speed reducer gear and an inner gear are arranged on the circumferential outer side of the input shaft assembly; the friction group is arranged on the right side of the internal gear; a compression spring is arranged in the speed reduction shell. The speed reducer can overcome the defects of an existing speed reducer of the electric switch machine, the sealing performance is improved, the influence of environmental changes on friction current of the speed reducer is eliminated, and the stability and reliability of the speed reducer and the switch machine are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of railway turnout conversion equipment, in particular to a sealed disc friction reducer. Background Art

[0002] A switch machine is an important signal infrastructure equipment used to reliably switch the position of switches, change the direction of switch opening, lock the switch point rail, and reflect the position of switches. It can well ensure driving safety, improve transportation efficiency, and improve the labor intensity of drivers.

[0003] The main functions of the electric switch are to convert and lock the point rail and the heart rail, change the opening direction of the turnout, and reflect the position status of the point rail and the heart rail through the contact points. It is one of the important equipment to ensure the efficient, safe and orderly operation of railway transportation.

[0004] At present, the reducers of some existing models of electric switch machines are realized by the friction between the hub friction belt and the protruding end of the internal gear, which is mainly used for overload protection and torque transmission. Among them, when the switching 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 by mutual friction, so as to protect the motor and related parts. In addition, after the switch machine is normally switched in place, the remaining inertia also needs to be absorbed by the relative sliding of the coupling on the reducer.

[0005] However, the reducer of the existing switch machine is greatly affected by the ambient temperature and air humidity during use, causing large fluctuations in the friction current of the reducer. If the friction current is too large, the reducer overload protection function will be lost, burning the motor of the electric switch machine and damaging related parts. If the friction current is too small, the switch machine cannot switch points normally.

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

[0008] Therefore, there is an urgent need to develop a technology that can solve the technical problems existing in the reducer of the above electric switch machine and improve the reliability and stability of the electric switch machine. Utility Model Content

[0009] The utility model aims to provide a sealed disc friction reducer in view of the technical defects in the prior art.

[0010] To this end, the present utility model provides a sealed disc friction reducer, which includes a reducer part and a disc friction coupling part connected to each other;

[0011] Among them, the reducer part includes a reduction cover, an intermediate plate and a reduction housing;

[0012] The disc friction coupling part includes a fixed chuck and a groove compression nut;

[0013] The reduction cover, the intermediate plate, the reduction housing, the fixed chuck and the groove compression nut are connected together in sequence from left to right;

[0014] Between the reduction cover, the intermediate plate, the reduction housing, the fixed chuck and the groove compression nut, a component installation cavity is formed;

[0015] Inside the component installation cavity, an input shaft assembly and an output shaft assembly, as well as a friction group and a compression spring are provided;

[0016] The output shaft assembly passes horizontally through the input shaft assembly and is then connected to the equalizing plate;

[0017] On the circumferential outer side of the input shaft assembly, a fourth bearing, a reducer gear and an internal gear are sequentially arranged from left to right in a surrounding manner;

[0018] On the right side of the internal gear, the friction group is provided;

[0019] Inside the reduction housing, a compression spring is provided;

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

[0021] On the left and right sides of each inner friction plate, there is respectively an outer friction plate;

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

[0023] As can be seen from the technical solutions provided by the present utility model above, compared with the prior art, the present utility model provides a sealed disc friction reducer, which is scientifically designed and can overcome the deficiencies of the reducer in the existing electric switch machine. By adopting a multi-layer sealing design, the present utility model comprehensively improves the sealing performance of the product, eliminates the influence of environmental changes (such as changes in environmental temperature and air humidity) on the friction current of the reducer, improves the stability and reliability of the switch machine reducer, and further improves the overall stability and reliability of the switch machine, having great significance in production practice.

[0024] In addition, for the present utility model, it adopts the working mode of mutual cooperation and friction between the inner friction plate and the outer friction plate, solves the defect of relatively fast wear existing in the existing friction belt (i.e., hub-type friction belt) mode, improves the stability and reliability of the speed reducer, and fully meets the requirements of safety and high efficiency during the operation of the switch machine. Brief Description of the Drawings

[0025] Figure 1a Schematic perspective view of a sealed disc friction speed reducer provided by the present utility model;

[0026] Figure 1b Cross-sectional view of a sealed disc friction speed reducer provided by the present utility model;

[0027] Figure 2 Left view of a sealed disc friction speed reducer provided by the present utility model;

[0028] Figure 3 Exploded view of a sealed disc friction speed reducer provided by the present utility model;

[0029] Figure 4 Schematic perspective view of the speed reduction cover in a sealed disc friction speed reducer provided by the present utility model;

[0030] Figure 5 Schematic diagram of the structure of the speed reducer gear in a sealed disc friction speed reducer provided by the present utility model;

[0031] Figure 6a Schematic perspective view of the internal gear in a sealed disc friction speed reducer provided by the present utility model;

[0032] Figure 6b Cross-sectional view of the internal gear in a sealed disc friction speed reducer provided by the present utility model;

[0033] Figure 7a Schematic perspective view one of the speed reduction housing in a sealed disc friction speed reducer provided by the present utility model;

[0034] Figure 7b Schematic perspective view of the speed reduction housing in a sealed disc friction speed reducer provided by the present utility model Figure 2 ;

[0035] Figure 8 Schematic perspective view of the locking piece in a sealed disc friction speed reducer provided by the present utility model;

[0036] Figure 9a Axial cross-sectional view of the input shaft group in a sealed disc friction speed reducer provided by the present utility model;

[0037] Figure 9b In the input shaft group of a sealed disc friction reducer provided by the present utility model, a three-dimensional structural schematic diagram of the input shaft;

[0038] Figure 9c In a sealed disc friction reducer provided by the present utility model, a three-dimensional structural schematic diagram of the eccentric sleeve;

[0039] Figure 9d In a sealed disc friction reducer provided by the present utility model, a three-dimensional structural schematic diagram of the first external gear;

[0040] Figure 9e In a sealed disc friction reducer provided by the present utility model, a three-dimensional structural schematic diagram of the second external gear;

[0041] Figure 10 In a sealed disc friction reducer provided by the present utility model, a three-dimensional structural schematic diagram of the output shaft group;

[0042] Figure 11a In a sealed disc friction reducer provided by the present utility model, a side structural schematic diagram of the fixed chuck;

[0043] Figure 11b In a sealed disc friction reducer provided by the present utility model, a cross-sectional view of the fixed chuck;

[0044] Figure 12 In a sealed disc friction reducer provided by the present utility model, a side structural schematic diagram of the external friction plate;

[0045] Figure 13 In a sealed disc friction reducer provided by the present utility model, a side structural schematic diagram of the internal friction plate;

[0046] Figure 14a In a sealed disc friction reducer provided by the present utility model, a side structural schematic diagram of the groove pressing nut;

[0047] Figure 14b In a sealed disc friction reducer provided by the present utility model, a cross-sectional view of the groove pressing nut;

[0048] In the figure: 1 - internal friction plate, 2 - reduction cover, 3 - intermediate plate, 4 - reduction housing, 5 - internal gear;

[0049] 6 - output shaft, 7 - fixed chuck, 8 - groove pressing nut, 9 - external friction plate, 10 - compression spring;

[0050] 11 - locking piece, 12 - locking nail, 13 - L-shaped sealing ring, 14 - small retaining ring, 15 - large retaining ring;

[0051] 16 - Nameplate, 171 - First external gear, 172 - Second external gear, 18 - Reducer gear, 19 - Eccentric sleeve, 20 - Roller bar;

[0052] 2000 - Reducing cover cavity, 201 - First bearing mounting step hole, 202 - First bolt mounting through hole; 203 - Threaded mounting hole;

[0053] 21 - Sleeve, 22 - Oil baffle, 23 - Input shaft, 24 - Load sharing plate, 25 - Isolation plate;

[0054] 26 - Oil - proof felt, 27 - Oil filling label, 28 - Third bearing, 29 - Fourth bearing; 30 - Fifth bearing;

[0055] 301 - Second bolt mounting through hole, 311 - First bearing, 312 - Second bearing, 32 - Thrust bearing, 33 - First O - ring, 34 - Second O - ring, 35 - Dust seal;

[0056] 36 - First shaft retaining ring, 37 - Second shaft retaining ring, 38 - Hole retaining ring, 39 - Short flat key;

[0057] 40 - Long flat key, 41 - First screw, 42 - Second bolt, 43 - Third bolt, 44 - Fourth bolt, 45 - Third flat washer;

[0058] 46 - First spring washer, 47 - Third spring washer, 48 - Fourth spring washer, 49 - Rivet, 50 - Fourth flat washer; 51 - Handling handle, 100 - Input shaft assembly, 200 - Output shaft assembly. Detailed implementation mode

[0059] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0060] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0061] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", and "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0062] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, the meaning of "a plurality of" is two or more unless otherwise clearly and specifically defined.

[0063] See Figures 1a to 1b 、 Figures 2 to 5 、 Figures 6a to 6b 、 Figures 7a to 7b 、 Figure 8 、 Figures 9a to 9e 、 Figure 10 、 Figures 11a to 11b 、 Figures 12 to 13 、 Figures 14a to 14b This utility model provides a sealed disc friction reducer, which is a sealed disc friction reducer for an electric switch machine, and includes a reducer (i.e., a planetary gear reducer) part and a disc friction coupling part that are connected to each other;

[0064] Among them, the reducer part includes a reduction cover 2, an intermediate plate 3, and a reduction housing 4;

[0065] The disc friction coupling part includes a fixed chuck 7 and a groove retaining nut 8;

[0066] The reduction cover 2, the intermediate plate 3, the reduction housing 4, the fixed chuck 7, and the groove retaining nut 8 are sequentially connected together from left to right;

[0067] An assembly installation cavity is formed among the reduction cover 2, the intermediate plate 3, the reduction housing 4, the fixed chuck 7, and the groove retaining nut 8;

[0068] An input shaft assembly 100 and an output shaft assembly 200, as well as a friction group and a compression spring 10, are arranged in the assembly installation cavity;

[0069] The output shaft assembly 200 passes horizontally through the input shaft assembly 100 and is then connected to the equalizing plate 24;

[0070] On the circumferential outer side of the input shaft assembly 100, a fourth bearing 29, a reducer gear 18, and an internal gear 5 are arranged in sequence from left to right in a surrounding manner.

[0071] On the right side of the internal gear 5, the friction group is arranged.

[0072] In the reduction housing 4, a compression spring 10 is arranged.

[0073] The friction group includes at least two outer friction plates 9 and at least one inner friction plate 1.

[0074] On the left and right sides of each inner friction plate 1, there is respectively an outer friction plate 9.

[0075] The friction group is located in the circumferential outer side direction of the right end of the output shaft assembly 200.

[0076] It should be noted that for the present utility model, the reducer part specifically includes multiple components such as a reduction 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 internal gear 5, a first O-ring 33, and a reduction housing 4.

[0077] It should be noted that for the present utility model, the disc friction coupling part specifically includes multiple components such as a compression spring 10, a second O-ring 34, a fixed chuck 7, an outer friction plate 9, an inner friction plate 1, a thrust bearing 32, an L-shaped sealing ring 13, a groove pressing nut 8, and a dust-proof ring 35.

[0078] In the present utility model, referring to Figure 1b , Figure 3 , Figures 9a to 9e As shown, for the reducer part, the input shaft assembly 100 includes a horizontally distributed input shaft 23.

[0079] On the outer side of the right end of the input shaft 23, an eccentric sleeve 19 and a third bearing 28 are sleeved.

[0080] On the circumferential outer side of the eccentric sleeve 19, a second bearing 312 and a first bearing 311 are sleeved.

[0081] The second bearing 312, the first bearing 311, and the third bearing 28 are arranged in sequence from left to right.

[0082] On the outer ring of the first bearing 311, a first external gear 171 is sleeved.

[0083] On the outer ring of the second bearing 312, a second external gear 172 is sleeved.

[0084] An isolation plate 25 is arranged between the first external gear 171 and the second external gear 172.

[0085] Specifically, on the left and right sides of the third bearing 28, a second shaft retaining ring 37 and a first shaft retaining ring 36 are respectively provided;

[0086] The second shaft retaining ring 37 is located between the first bearing 311 and the third bearing 28;

[0087] On the left side of the second bearing 312, a large retaining ring 15 is provided;

[0088] 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.

[0089] Furthermore, on the circumferential outer side of the input shaft 23, a first cylindrical surface 2301, a second cylindrical surface 2302, and a third cylindrical surface 2303 are sequentially provided from left to right;

[0090] On the outer side of the first cylindrical surface 2301, a fourth bearing 29 is sleeved;

[0091] At the right end of the third cylindrical surface 2303, a first card slot 2304 is provided;

[0092] The first card slot 2304 is used to set the first shaft retaining ring 36;

[0093] In the middle and left end of the third cylindrical surface 2303, a horizontally distributed long circular groove is distributed;

[0094] 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;

[0095] 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;

[0096] On the long circular groove of the third cylindrical surface 2303, a horizontally distributed long flat key 40 is provided;

[0097] On the second cylindrical surface 2302, a horizontally distributed short circular groove is distributed;

[0098] On the short circular groove of the second cylindrical surface 2302, a horizontally distributed short flat key 39 is provided;

[0099] On the circumferential outer side of the third cylindrical surface 2303, an eccentric sleeve 19 is provided.

[0100] Furthermore, the eccentric sleeve 19 includes two eccentric cylindrical surfaces, namely a first eccentric sleeve cylindrical surface 1904 and a second eccentric sleeve cylindrical surface 1905;

[0101] On the outer circumferential surface at the right end of the second eccentric sleeve cylindrical surface 1905, a card slot 1903 is circumferentially provided;

[0102] The second card slot 1903 is used to set the retaining ring 37 for the second shaft.

[0103] The eccentric sleeve 19 is provided with a circular cavity 1901 of the eccentric sleeve that is horizontally and penetratingly distributed and a rectangular limiting groove 1902 that is horizontally and penetratingly distributed.

[0104] The square limiting groove 1902 is located on the inner wall of the circular cavity 1901 of the eccentric sleeve.

[0105] The third cylindrical surface 2303 of the input shaft 23 horizontally passes through the circular cavity 1901 of the eccentric sleeve 19.

[0106] The third cylindrical surface 2303 is connected to the square limiting groove 1902 (i.e., key connection) through the long flat key 40 provided thereon, thereby realizing linkage.

[0107] Furthermore, a first circular cavity 1713 is horizontally and penetratingly provided at the central position of the first external gear 171.

[0108] The first external gear 171 is evenly provided with eight horizontally and penetrating first circular holes 1711 on the annular plane.

[0109] A circle of first teeth 1712 (specifically 41) is provided on the outer periphery of the first external gear 171.

[0110] The outer ring of the first bearing 311 is arranged on the first circular cavity 1713 of the first external gear 171.

[0111] The inner ring of the first bearing 311 is arranged on the second eccentric sleeve cylindrical surface 1905 of the eccentric sleeve 19, so that the first external gear 171 is linked with the eccentric sleeve 19.

[0112] Furthermore, a second circular cavity 1723 is horizontally and penetratingly provided at the central position of the second external gear 172.

[0113] The second external gear 172 is evenly provided with eight horizontally and penetrating second circular holes 1721 on the annular plane.

[0114] A circle of second teeth 1722 (specifically 41) is provided on the outer periphery of the second external gear 172.

[0115] The outer ring of the second bearing 312 is arranged on the second circular cavity 1723 of the second external gear 172.

[0116] The inner ring of the second bearing 312 is arranged on the first eccentric sleeve cylindrical surface 1904 of the eccentric sleeve 19, so that the second external gear 172 is linked with the eccentric sleeve 19.

[0117] In the present utility model, refer to Figure 1b 、 Figure 3 、Figure 10 As shown, for the reducer part, the output shaft assembly 200 includes an output shaft 6 distributed horizontally;

[0118] At the left end of the output shaft 6, a circular plane 2002 is provided;

[0119] Eight horizontally penetrating roller mounting round holes 2003 are circumferentially and surroundingly provided along the circular plane 2002;

[0120] Each roller mounting round hole 2003 is fixedly connected to the right end of a horizontally distributed roller 20 respectively;

[0121] A roller sleeve 21 is sleeved on the outer circumferential wall of the middle part of each roller 20 respectively;

[0122] Two fifth bearings 30 are sleeved on the outer circumferences of the middle part and the right end of the output shaft 6;

[0123] Each roller sleeve 21 is arranged in the first round hole 1711 on the first outer gear 171 and the second round hole 1721 on the second outer gear 172 of the input shaft assembly 100;

[0124] Specifically, the roller mounting round hole 2003 and the right end of the roller 20 are in interference fit.

[0125] The roller 20 and the roller sleeve 21 are in clearance fit.

[0126] It should be noted that the eight rollers 20 and the eight roller mounting round holes 2003 on the output shaft 6 are in interference fit and are fixed in the roller mounting round holes 2003 of the output shaft 6.

[0127] It should be noted that the roller sleeve 21 rotates around the roller 20 during operation, and the two are in clearance fit.

[0128] Specifically, on the outer circumference of the middle part and the right end of the output shaft 6, there is an output shaft cylindrical surface 2001;

[0129] Two fifth bearings 30 are sleeved on the output shaft cylindrical surface 2001;

[0130] The inner rings of the two fifth bearings 30 are located on the output shaft cylindrical surface 2001 of the output shaft 6;

[0131] The outer rings of the two fifth bearings 30 are located in the inner gear round hole 505 of the internal gear 5;

[0132] In the present utility model, referring to Figure 1b 、 Figure 3 、 Figure 5 As shown, for the reducer part, the reducer gear 18 is sleeved on the input shaft 23 of the input shaft assembly 100;

[0133] In specific implementation, a middle cavity 1801 is transversely penetrated through the central position of the reducer gear 18;

[0134] Inside the middle cavity 1801, the input shaft 23 of the input shaft assembly 100 is placed;

[0135] A keyway 1802 is arranged on the middle cavity 1801 of the reducer gear 18;

[0136] Inside the keyway 1802, a flat key 39 on the input shaft 23 of the input shaft assembly 100 is arranged, so that the reducer gear 18 is linked with the input shaft 23;

[0137] In specific implementation, see Figure 1b 、 Figure 4 As shown, a first bearing mounting stepped hole 201 is arranged on the reduction cover 2;

[0138] The first bearing mounting stepped hole 201 is used to place the fourth bearing 29;

[0139] The outer ring of the fourth bearing 29 is placed in the reducer cavity 2000 on the inner side of the reduction cover 2;

[0140] 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 at the left end of the input shaft 23 of the input shaft assembly 100);

[0141] Furthermore, see Figure 1b As shown, a small retaining ring 14 is arranged at the position between the fourth bearing 29 and the reducer gear 18;

[0142] In the present utility model, for the reducer part, see Figure 3 As shown, a central through hole distributed transversely is arranged at the central position of the load sharing plate 24;

[0143] Eight load sharing plate through holes 2401 are evenly arranged along the circumferential direction on the load sharing plate 24;

[0144] The load sharing plate through holes 2401 are arranged corresponding to the first round hole 1711 and the second round hole 1721 on the input shaft assembly 100, and the roller mounting round hole 2003 on the output shaft assembly 200;

[0145] The load sharing plate 24 is arranged on eight rollers 20 of the output shaft assembly 200 through eight load sharing plate through holes 2401;

[0146] In specific implementation, the rollers 20 on the output shaft assembly 200 sequentially penetrate through the first round hole 1711 and the second round hole 1721 from right to left, and the left end parts thereof are connected with the load sharing plate through holes 2401 on the load sharing plate 24.

[0147] It should be noted that for the present utility model, the input shaft assembly 100 drives the output shaft assembly 200 to be linked through eight first round holes 1711 on the first external gear 171 and eight second round holes 1721 on the second external gear 172 for placing eight roller sleeves 21 on the output shaft assembly 200.

[0148] In the present utility model, referring to Figure 6a 、 Figure 6b As shown, for the reducer part, a round hole 505 of the internal gear 5 (i.e., a central through hole) is horizontally penetrated through the center position;

[0149] On the inner wall of the left end of the round hole 505 of the internal gear 5, a circle of internal gear teeth 504 is circumferentially arranged (specifically, there may be 42 internal gear teeth 504);

[0150] The first teeth 1712 on the outer periphery of the first external gear 171 and the second teeth 1722 on the outer periphery of the second external gear 172 of the input shaft assembly 100 are respectively meshed and connected with the internal gear teeth 504.

[0151] It should be noted that for the present utility model, the input shaft assembly 100 realizes linkage with the internal gear teeth 504 of the internal gear 5 through the first teeth 1712 of the first external gear 171 and the second teeth 1722 of the second external gear 172.

[0152] Specifically, on the inner wall of the right end of the round hole 505 of the internal gear 5, an internal gear card slot 506 is arranged along the circumferential direction;

[0153] Referring to Figure 1b As shown, a hole retaining ring 38 is arranged in the internal gear card slot 506 of the internal gear 5;

[0154] Two fifth bearings 30 on the output shaft assembly 200 are arranged in the middle inner cavity of the round hole 505 of the internal gear 5;

[0155] Furthermore, an oil baffle 22 is arranged between the hole retaining ring 38 and the two fifth bearings 30 of the output shaft assembly 200;

[0156] Furthermore, on the right side of the hole retaining ring 38 arranged on the internal gear 5, an oil-proof felt 26 is circumferentially arranged;

[0157] On the circumferential outer side of the right end of the internal gear 5, a circle of oil-proof felt installation groove 502 is circumferentially arranged;

[0158] An annular oil-proof felt 26 is arranged in the oil-proof felt installation groove 502.

[0159] Furthermore, on the circumferential outer side of the left end of the internal gear 5, an annular circular surface 501 is arranged;

[0160] On the right side of the annular circular surface 501, a first O-ring mounting groove 507 is disposed circumferentially.

[0161] A first O-ring 33 is disposed in the first O-ring mounting groove 507 of the internal gear 5 to achieve sealing between the internal gear 5 and the reduction housing 4.

[0162] Furthermore, on the outer circumference of the right end of the internal gear 5, six internal friction plate slots 503 are evenly distributed circumferentially.

[0163] In the present utility model, referring to Figure 1b 、 Figure 4 As shown, for the reducer part, three protruding first shoulders are provided on the outer circumference of the reduction cover 2.

[0164] A first bolt mounting through hole 202 is provided on each first shoulder.

[0165] The intermediate plate 3 is disposed between the reduction cover 2 and the reduction housing 4.

[0166] Referring to Figure 3 As shown, three protruding second shoulders are provided on the outer circumference of the intermediate plate 3.

[0167] A second bolt mounting through hole 301 is provided on each second shoulder.

[0168] In the present utility model, referring to Figure 3 、 Figure 7a 、 Figure 7b As shown, for the reducer part, the reduction housing 4 includes a hollow reduction housing inner cavity 404.

[0169] The inner wall of the right end of the reduction housing inner cavity 404 is disposed on the circumferential outer side of the annular circular surface 501 of the internal gear 5.

[0170] On the outer circumference of the reduction housing 4, three protruding third shoulders 403 are provided.

[0171] A first threaded connection hole 4031 and a second threaded connection hole 4032 are respectively provided at both ends of each third shoulder 403.

[0172] The reduction cover 2, the intermediate plate 3 and the reduction housing 4 are connected together by a third bolt 43.

[0173] Specifically, the third bolt 43 sequentially passes through the first bolt mounting through hole 202 of the reduction cover 2 and the second bolt mounting through hole 301 on the intermediate plate 3 from left to right, and then is threadedly fixed to the first threaded connection hole 4031 on the reduction housing 4.

[0174] Specifically, an annular third spring washer 47 and an annular third flat washer 45 are provided on the third bolt 43.

[0175] In specific implementation, a deceleration housing threaded hole 405 is provided on the deceleration housing 4;

[0176] The handling handle 51 is connected to the deceleration housing 4 through the deceleration housing threaded hole 405;

[0177] Furthermore, the end of the handling handle 51 is threadedly and fixedly connected to the deceleration housing threaded hole 405.

[0178] In specific implementation, a limit groove 401 and a deceleration housing threaded connection hole 402 are provided at the top of the deceleration housing 4;

[0179] The locking piece 11 is fixedly connected to the deceleration housing 4 through the fourth bolt 44;

[0180] Furthermore, the locking piece 11 includes an installation edge 1103;

[0181] A locking piece installation groove 1101 is provided on the installation edge 1103;

[0182] The installation edge 1103 of the locking piece 11 is arranged on the limit groove 401 of the deceleration housing 4;

[0183] After the fourth bolt 44 passes through the locking piece installation groove 1101 of the locking piece 11, it is threadedly and fixedly connected to the deceleration housing threaded connection hole 402 on the deceleration housing 4.

[0184] Furthermore, an annular fourth spring washer 48 and an annular fourth flat washer 50 are provided on the fourth bolt 44.

[0185] In specific implementation, a plurality of compression spring installation holes 406 penetrating horizontally are provided on the right side of the deceleration housing 4;

[0186] One compression spring 10 in the disc friction coupling part is provided in each compression spring installation hole 406.

[0187] In the present utility model, referring to Figure 3 , Figure 11a , Figure 11b As shown, for the disc friction coupling part, one compression spring 10 is respectively provided in each compression spring installation hole 406 of the deceleration housing 4;

[0188] The compression spring 10 is in contact with the left side of the adjacent friction group (specifically, the left side of the adjacent inner friction plate 1 or outer friction plate 9);

[0189] Three protruding fourth shoulders are provided on the outer periphery of the fixed chuck 7;

[0190] One fixed chuck bolt installation through hole 701 is provided on each fourth shoulder;

[0191] On the inner cavity of the fixed chuck 7, six outer friction plate slots 702 are evenly distributed.

[0192] On the outer circumferential cylindrical surface of the fixed chuck 7, a first adjusting external thread 704 is provided.

[0193] A second O-ring installation groove 703 is provided on the fixed chuck 7.

[0194] On the second O-ring installation groove 703 of the fixed chuck 7, a second O-ring 34 is provided.

[0195] It should be noted that the second O-ring 34 is used to achieve the seal between the fixed chuck 7 and the reduction housing 4.

[0196] Specifically, the fixed chuck 7 is fixedly connected to the reduction housing 4 through three second bolts 42.

[0197] Further, after the second bolt 42 passes through the fixed chuck bolt installation through-hole 701 of the fixed chuck 7, it is threadedly fixedly connected to the second threaded connection hole 4032 corresponding to the position on the reduction housing 4.

[0198] Further, an annular third spring washer 47 is provided on the second bolt 42.

[0199] In the present utility model, referring to Figure 3 、 Figure 12 、 Figure 13 As shown, for the disc friction coupling part, on the outer periphery of each outer friction plate 9, six equally spaced outer friction plate outer protrusions 901 are circumferentially provided.

[0200] On the inner side of the central through-hole of each inner friction plate 1, six equally spaced inner friction plate inner protrusions 101 are circumferentially provided.

[0201] 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 are arranged on the outer side of the right end of the internal gear 5 in the circumferential direction.

[0202] The internal gear 5 is located in the inner cavity of the fixed chuck 7.

[0203] Specifically, the outer protrusions 901 of the outer friction plate 9 are correspondingly arranged in the outer friction plate slots 702 of the fixed chuck 7.

[0204] The inner friction plate inner protrusions 101 of the inner friction plate 1 are correspondingly arranged in the inner friction plate slots 503 of the internal gear 5.

[0205] It should be noted that the six inner friction plate slots 503 at the right end of the internal gear 5 are correspondingly connected to the six inner friction plate inner protrusions 101 on the inner friction plate 1, for example, in an embedded connection.

[0206] It should be noted that the outer protruding portion 901 of the outer friction plate 9 and the outer friction plate slot 702 of the fixed chuck 7 are in transition fit; the inner protruding portion 101 of the inner friction plate 1 and the inner friction plate slot 503 of the internal gear 5 are in transition fit.

[0207] 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 to avoid rusting of the outer friction plate caused by environmental influence, resulting in changes in the friction coefficient.

[0208] Specifically, both the left and right sides of the inner friction plate 1 have friction surfaces;

[0209] On the friction surface, chip removal grooves 102 are arranged in a radial distribution;

[0210] It should be noted that chip removal grooves 102 are arranged in 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.

[0211] In the present utility model, as shown in Figure 3 、 Figure 14a 、 Figure 14b For the disc friction coupling part, a second adjustment internal thread 803 is arranged on the inner cavity of the groove pressing nut 8;

[0212] The groove pressing nut 8 is threadedly and fixedly connected to the first adjustment external thread 704 on the fixed chuck 7 through the second adjustment internal thread 803 thereon;

[0213] Specifically, an L-shaped sealing ring 13 is arranged between the groove pressing nut 8 and the fixed chuck 7 for realizing the seal between the groove pressing nut 8 and the fixed chuck 7;

[0214] Specifically, an inner cavity step 807 is arranged in the inner cavity of the groove pressing nut 8;

[0215] A thrust bearing 32 is arranged on the inner cavity step 807;

[0216] On the groove pressing nut 8, groove pressing nut stepped holes 805 are arranged in a transverse and penetrating distribution;

[0217] A dust-proof ring 35 is arranged on the groove pressing nut stepped hole 805 for realizing the seal between the groove pressing nut 8 and the output shaft 6 in the output shaft assembly 200;

[0218] Specifically, a plurality of rectangular card slots 801 are evenly arranged on the outer periphery of the groove pressing nut 8;

[0219] On the right side surface of the groove pressing nut 8, six radially distributed rectangular protrusions 80 are evenly distributed along the circumferential direction;

[0220] One end of the locking piece 11 connected to the top of the reduction gear housing 4 is provided with a locking nail 12;

[0221] The locking nail 12 is arranged in any one of the rectangular clamping grooves 801 on the outer periphery of the groove pressing nut 8.

[0222] In the present utility model, as shown in Figure 4 a raised portion is provided on the upper part of the outer periphery of the reduction gear cover 2;

[0223] A threaded mounting hole 203 (i.e., an internal threaded hole) is provided on the raised portion;

[0224] An oil filling label 27 is provided above the raised portion;

[0225] The oil filling label 27 is fixedly connected to the raised portion on the reduction gear cover 2 through a first screw 41;

[0226] Specifically, the oil filling label 27 is provided with a screw through hole at a position corresponding to the threaded mounting hole 203;

[0227] After the first screw 41 passes through the screw through hole on the oil filling label 27, it is threadedly fixedly connected to the threaded mounting hole 203 on the corresponding reduction gear cover 2.

[0228] Specifically, an annular first spring washer 46 is sleeved on the first screw 41.

[0229] In the present utility model, as shown in Figure 2 、 Figure 4 four rivet mounting holes 204 are horizontally penetrated on the reduction gear cover 2;

[0230] A nameplate 16 is provided on the left side of the reduction gear cover 2;

[0231] The nameplate 16 is respectively provided with a nameplate mounting through hole at a position corresponding to each rivet mounting hole 204;

[0232] The nameplate 16 is fixedly connected to the reduction gear cover 2 through four rivets 49;

[0233] The rivet 49 passes through the nameplate mounting through hole on the nameplate 16 and is fixedly connected (specifically, riveted) to the corresponding rivet mounting hole 204.

[0234] In the present utility model, specifically, the reducer gear 18 meshes with the original motor gear in an external electric switch machine (such as the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.);

[0235] Specifically, as shown in Figure 2 the reduction gear cover 2 is provided with a motor docking hole 300;

[0236] In the original motor of the electric switch machine (such as the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.), after the output shaft of the motor horizontally penetrates the motor docking hole 300, a motor gear is installed at its right end;

[0237] This motor gear is meshed and connected with the reducer gear 18;

[0238] Furthermore, the number of teeth of the reducer gear 18 is greater than that of the motor gear.

[0239] It should be noted that for the present utility model, the friction reducer of the present utility model is a sealed disc friction reducer for an electric switch machine, including a planetary gear reducer and a disc friction coupling. The planetary gear reducer and the disc friction coupling are installed together. Under normal circumstances, the reducer amplifies and transmits the motor torque to the switch machine main shaft. When the turnout conversion encounters resistance, the friction coupling performs a friction operation to protect the switch machine and the turnout from being damaged. The friction pair of the disc friction reducer is sealed in the housing, which can prevent the friction pair from being contaminated by condensate water, oil, dust, etc., affecting the stability of the friction coupling, reducing the bounce of the switch machine contacts caused by the unstable friction current of the switch machine, and avoiding affecting the railway transportation efficiency.

[0240] Based on the above design of the present utility model, the friction reducer of the present utility model is a sealed disc friction reducer for an electric switch machine, which can realize torque amplification, torque transmission and overload protection through deceleration.

[0241] In order to more clearly understand the technical solution of the present utility model, the working principle of the reducer part of the friction reducer of the present utility model to realize deceleration, torque amplification and torque transmission is described below.

[0242] The original motor in the electric switch machine (such as the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.) is fixed on the sealed disc friction reducer provided by the present utility model. The motor gear installed on the motor is meshed with the reducer gear 18 in the sealed disc friction reducer provided by the present utility model. The output shaft 6 in the output shaft assembly 200 of the sealed disc friction reducer provided by the present utility model is connected to the original transmission structure (such as a gear rack mechanism) in the electric switch machine (such as by key connection. The specific connection method can directly adopt the connection method between the output shaft and the transmission structure in the existing friction reducer, which will not be elaborated here).

[0243] During normal operation, when the motor of the electric switch machine is powered on, the motor rotates counterclockwise at high speed. The motor gear drives the reducer gear 18 of the sealed disc friction reducer provided by the present invention to rotate clockwise. Since the number of teeth of the reducer gear 18 is greater than that of the motor gear, the first-stage reduction of the sealed disc friction reducer provided by the present invention is achieved;

[0244] Then, after the reducer gear 18 of the sealed disc friction reducer provided by the present invention rotates, 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. The eccentric sleeve 19 drives the first outer gear 171 and the second outer gear 172 to perform a cycloidal rotation movement through the first bearing 311 and the second bearing 312 installed thereon.

[0245] Under normal circumstances, the internal gear 5 is "fixed in place" by the frictional action of the friction clutch. The first outer gear 171 and the second outer gear 172 are installed in the internal gear 5. The internal gear teeth 504 of the internal gear 5 mesh with the first teeth 1712 of the first outer gear 171 and the second teeth 1722 of the second outer gear 172. The first outer gear 171 and the second outer gear 172 are each provided with eight round holes, and a roller 20 sleeved with a roller sleeve 21 is inserted into each round hole. The eight rollers 20 are fixed on the output shaft 6.

[0246] When the input shaft 23 rotates one week, the first outer gear 171 and the second outer gear 172 also perform one week of eccentric movement. The first outer gear 171 and the second outer gear 172 have 41 teeth, and the internal gear 5 has 42 tooth grooves, with a difference of one tooth between them. Therefore, when the first outer gear 171 and the second outer gear 172 perform one week of eccentric movement, the teeth of the first outer gear 171 and the second outer gear 172 are misaligned by one tooth in the internal gear 5.

[0247] Under normal circumstances, the internal gear 5 remains stationary, forcing the outer gears (specifically including the first outer gear 171 and the second outer gear 172) to rotate in the opposite direction by an angle of one tooth during one week of eccentric movement. When the input shaft 23 rotates 41 weeks in the clockwise direction, the outer gears rotate one week in the counterclockwise direction, driving the output shaft 6 to rotate one week in the counterclockwise direction. In this way, the second-stage reduction is completed. At the same time, the output shaft 6 is connected to the transmission mechanism (such as a gear-rack mechanism) of the switch machine. After the double-machine reduction of the reducer, the output torque of the motor is amplified, and the corresponding rod in the electric switch machine is pushed through the transmission mechanism. The rod of the electric switch machine is connected to the turnout, and thus the conversion of the turnout is completed.

[0248] To more clearly understand the technical solution of the present invention, the working principle of the disc friction clutch part of the friction reducer of the present invention for achieving overload protection is described below.

[0249] For the sealed disc friction reducer provided by the present utility model, regarding the disc friction coupling part, the inner friction plate 1 thereof is fixed on the internal gear 5 through the inner protrusion 101 of the inner friction plate; the outer friction plate 4 of the reducer is fixed on the fixed chuck 7 through the outer protrusion 901 of the outer friction plate, and the fixed chuck 7 is fixed on the reduction housing 4 through the second bolt 42. The reduction housing 4 is fixed on the bottom housing of the switch machine through the original fastening bolts of the electric switch machine.

[0250] Not less than one group of outer friction plates 9 and inner friction plates 1 are alternately placed on the fixed chuck 7 and the internal gear 5, and the fixed chuck 7 and the internal 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 reduction housing 4. The groove pressing nut 8 and the fixed chuck 7 are threadedly connected through adjustment threads (the groove pressing nut 8 is threadedly fixed to the first adjustment external thread 704 on the fixed chuck 7 through the second adjustment internal thread 803 thereon).

[0251] If the groove pressing nut 8 is tightened, the friction group composed of the outer friction plates 9 and the inner friction plates 1 compresses the compression spring 10, and the pressure F1 between the friction groups increases. When the friction coefficient f of the friction group is constant, the frictional force F between the friction groups = F1 * f. Therefore, the frictional force of the friction group composed of the outer friction plates 9 and the inner friction plates 1 increases;

[0252] If the groove pressing nut 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 reduction housing 4 is released, and the pressure F1 between the friction groups decreases, and the frictional force of the friction group composed of the outer friction plates 9 and the inner friction plates 1 decreases.

[0253] Therefore, by tightening the groove pressing nut 8 of the sealed disc friction reducer of the present utility model, the frictional force of the friction group composed of the outer friction plates 9 and the inner friction plates 1 is increased, and by loosening the groove pressing nut 8 of the sealed disc friction reducer of the present utility model, the frictional force of the friction group composed of the outer friction plates 9 and the inner friction plates 1 is decreased. In this way, the internal gear 5 and the fixed chuck 7 can be connected together through the frictional force of the friction group composed of the outer friction plates 9 and the inner friction plates 1.

[0254] When the sealed disc friction reducer of the present utility model is working normally, it is necessary to fix the internal gear 5 to be stationary to transmit torque, and then drive the transmission mechanism (such as a rack and pinion mechanism) of the electric switch machine to switch the turnout. That is, the outer friction plates 9 and the inner friction plates 1 do not undergo relative sliding. In this case, it is necessary to adjust the tightening degree of the groove pressing nut 8 and the fixed chuck 7, and adjust the frictional force between the outer friction plates 9 and the inner friction plates 1 by adjusting the compression amount of the compression spring 10.

[0255] When the switch is subject to resistance and cannot be normally switched, the original transmission mechanism of the electric switch machine gets jammed. At this time, the output shaft 6 in the sealed disc friction reducer of the present invention connected to the original transmission mechanism of the electric switch machine also gets jammed. 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 friction reducer of the present invention 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 external gear 171 and the second external gear 172 to perform a cycloidal rotation movement through the first bearing 311 and the second bearing 312 installed thereon. Since the output shaft 6 is fixed and immovable, the roller 20 fixed to the output shaft 6 is fixed and immovable. The first external gear 171 and the second external gear 172 drive the internal gear 5 to rotate. During the rotation of the internal gear 5, the internal friction plate 1 installed thereon is driven to rotate. The fixed chuck 7 is fixed to the original bottom shell of the electric switch machine through the reduction housing 4. The external friction plate 9 installed on the fixed chuck 7 is fixed and immovable. At this time, the internal friction plate 1 and the external friction plate 9 slide relative to each other, thereby consuming the energy of the motor on the electric switch machine and protecting the original motor of the electric switch machine from being burned out, realizing the overload protection function of the sealed disc friction reducer provided by the present invention.

[0256] In the present invention, it should be noted that the friction force between the internal friction plate 1 and the external friction plate 9 of the ZD6 sealed disc friction reducer cannot be adjusted too large or too small.

[0257] If the friction force between the internal friction plate 1 and the external friction plate 9 is adjusted too large, once the switch is blocked and cannot be normally switched, the energy of the motor cannot be absorbed by the relative sliding between the internal friction plate 1 and the external friction plate 9, which may burn out the motor and damage other parts;

[0258] If the friction force between the internal friction plate 1 and the external friction plate 9 is adjusted too small, the internal gear 5 cannot remain stationary through the friction force between the internal friction plate 1 and the external friction plate 9, resulting in the inability to switch the switch.

[0259] It should be noted that the electric switch machine (such as the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.) uses a DC motor. The friction current of the switch machine reducer (that is, the current of the DC motor when the internal friction plate 1 and the external friction plate 9 slide relative to each other) has a linear relationship with the friction force between the internal friction plate 1 and the external friction plate 9, that is, when the friction force increases, the friction current increases proportionally; when the friction force decreases, the friction current decreases proportionally. Since the friction current is easy to measure, usually by measuring the friction current of the electric switch machine reducer, the friction force between the internal friction plate 1 and the external friction plate 9 is monitored.

[0260] In the present utility model, in terms of specific implementation, to prevent the change in the tightening degree of the fixed chuck 8 due to vibration or other abnormal factors after the friction current of the friction reducer of the present utility model, which is matched with an electric switch machine (such as the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.), is adjusted, thereby causing fluctuations in the friction current of the reducer of the ZD6 switch machine, the present utility model is provided with a plurality of rectangular grooves 801 on the fixed chuck 8. At the same time, a locking piece 11 is installed on the reduction housing 4. After the friction current of the reducer of the electric switch machine is adjusted, by adjusting the position of the locking piece mounting groove 1101 on the locking piece 11, the locking nail 12 is engaged into any one of the rectangular grooves 801 on the outer periphery of the fixed chuck 8.

[0261] In the present utility model, in terms of specific implementation, to facilitate the adjustment of the friction current of the friction reducer of the present utility model, which is matched with an electric switch machine (such as the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.), a plurality of rectangular protrusions 802 are provided on the fixed chuck 8. By using a monkey wrench to hold any one of the rectangular protrusions 802 on the fixed chuck 8, the friction current of the friction reducer of the present utility model, which is matched with the existing electric switch machine, can be adjusted conveniently by tightening and loosening the fixed chuck 8.

[0262] Compared with the prior art, the friction reducer provided by the present utility model has the following beneficial effects:

[0263] 1. The friction reducer provided by the present utility model is a reducer that is applied to and matched with an existing electric switch machine (such as the ZD6 series electric switch machine produced by Tianjin Railway Signal Co., Ltd.). It is a sealed disc-type friction reducer and can replace the ZD6 type reducer on the existing electric switch machine.

[0264] 2. The friction reducer of the present utility model uses inner and outer friction plates that are more wear-resistant and have a more stable friction coefficient to replace the original friction belt (such as a hub-type friction belt), greatly reducing the wear of the friction material and reducing the maintenance workload of maintenance personnel;

[0265] 3. The friction reducer of the present utility model realizes the sealing between the internal gear and the reduction housing by setting an O-ring on the internal gear, preventing oil stains from entering the working area of the inner and outer friction plates and causing changes in the friction current;

[0266] 4. The present utility model realizes the sealing between the fixed chuck and the reduction housing by setting an O-ring on the fixed chuck, preventing moisture in the working environment from entering the working area of the inner and outer friction plates;

[0267] 5. The present utility model realizes the sealing between the fixed chuck and the groove nut by setting an L-shaped sealing ring between the groove nut and the fixed chuck, preventing moisture in the working environment from entering the working area of the inner and outer friction plates;

[0268] 6. The utility model realizes the sealing between the groove pressing nut and the output shaft by arranging a dust-proof ring on the groove pressing nut, preventing the moisture in the working environment from entering the working area of the inner and outer friction plates.

[0269] 7. Practice has proved that the design of the utility model is scientific, effectively eliminating the influence of the change of the working environment on the friction current and improving the overall reliability of the electric switch machine.

[0270] In summary, compared with the prior art, a sealing type disc friction reducer provided by the utility model has a scientific structural design, can overcome the deficiencies of the existing reducer, and solves the influence of the change of the working environment on the friction current; the utility model replaces the friction belt (such as the hub type friction belt) of the existing reducer with inner and outer friction plates, effectively reducing the wear between the friction pairs, being beneficial to improving the stability and reliability of the switch machine, and meeting the requirements of safety and high efficiency during the operation of the switch machine.

[0271] The friction reducer provided by the utility model is a sealing type disc friction reducer, which is applied to the electric switch machine and has the advantages of stable structure, delicate and ingenious appearance and convenient operation.

[0272] The above are only the preferred embodiments of the utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A sealed disc friction reducer, characterized in that: It includes a reducer part and a disc friction coupling part which are connected to each other; The reducer part includes a reduction cover (2), an intermediate plate (3) and a reduction housing (4); The disc friction coupling part comprises a fixed chuck (7) and a groove nut (8); The reduction cover (2), the middle plate (3), the reduction housing (4), the fixed chuck (7) and the groove pressing nut (8) are connected together in sequence from left to right; A component installation cavity is formed between the reduction cover (2), the middle plate (3), the reduction housing (4), the fixed chuck (7) and the groove nut (8); An input shaft assembly (100) and an output shaft assembly (200), as well as a friction group and a compression spring (10) are arranged in the assembly installation cavity; The output shaft assembly (200) is connected to the load-balancing plate (24) after passing through the input shaft assembly (100) transversely; The input shaft assembly (100) is surrounded by a fourth bearing (29), a reducer gear (18) and an internal gear (5) which are sequentially arranged from left to right. The friction group is arranged on the right side of the internal gear (5); A compression spring (10) is arranged inside the reduction housing (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) is provided with an outer friction plate (9) on the left and right sides respectively; The friction group is located on the outer side of the right end of the output shaft assembly (200).

2. The friction reducer according to claim 1, characterized in that: For the reducer part, the input shaft assembly (100) includes a transversely distributed input shaft (23); An eccentric sleeve (19) and a third bearing (28) are mounted on the outer side of the right end of the input shaft (23); The circumferential outer side of the eccentric sleeve (19) is provided with a second bearing (312) and a first bearing (311); The second bearing (312), the first bearing (311) and the third bearing (28) are arranged in sequence from left to right; The outer ring of the first bearing (311) is sleeved with a first external gear (171); The outer ring of the second bearing (312) is sleeved with a second external gear (172); An isolation plate (25) is provided between the first external gear (171) and the second external gear (172); and / or, For the reducer part, the output shaft assembly (200) includes a transversely distributed output shaft (6); The left end of the output shaft (6) is provided with a circular plane (2002); The circular plane (2002) is provided with eight roller rod mounting circular holes (2003) extending transversely therethrough in a circumferential direction; Each roller rod mounting circular hole (2003) is respectively fixedly connected to the right end of a laterally distributed roller rod (20); The central circumferential outer wall of each rolling rod (20) is respectively covered with a rolling sleeve (21); Two fifth bearings (30) are mounted on the circumferential outer side of the middle part and the right end of the output shaft (6); Each roller sleeve (21) is disposed in a first circular hole (1711) on a first external gear (171) and a second circular hole (1721) on a second external gear (172) of an input shaft assembly (100); and / or, For the reducer part, the outer periphery of the reduction cover (2) is provided with three protruding first shaft shoulders; Each first shaft shoulder is provided with a first bolt installation through hole (202); The intermediate plate (3) is arranged between the reduction cover (2) and the reduction housing (4); The outer periphery of the middle plate (3) is provided with three protruding second shaft shoulders; A second bolt mounting through hole (301) is provided on each second shaft shoulder; and / or, For the reducer part, the reduction housing (4) includes a hollow reduction housing inner cavity (404); The inner wall of the right end of the inner cavity (404) of the reduction housing is arranged on the circumferential outer side of the annular circular surface (501) of the internal gear (5); The outer periphery of the reduction housing (4) is provided with three protruding third shaft shoulders (403); A first threaded connection hole (4031) and a second threaded connection hole (4032) are respectively provided at two ends of each third shaft shoulder (403); The reduction cover (2), the middle plate (3) and the reduction housing (4) are connected together via a third bolt (43).

3. The friction reducer according to claim 2, characterized in that: A second shaft retaining ring (37) and a first shaft retaining ring (36) are respectively arranged on the left and right sides of the third bearing (28); A second shaft retaining ring (37) is located between the first bearing (311) and the third bearing (28); A large retaining ring (15) is provided 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).

4. The friction reducer according to claim 3, characterized in that: A first cylindrical surface (2301), a second cylindrical surface (2302) and a third cylindrical surface (2303) are sequentially arranged from left to right on the circumferential outer side of the input shaft (23); A fourth bearing (29) is mounted on the outer side of the first cylindrical surface (2301); A first slot (2304) is provided at the right end of the third cylindrical surface (2303); A first clamping groove (2304) is used to set a first shaft retaining ring (36); A long circular groove extending laterally is distributed in the middle and left end of the third cylindrical surface (2303); The inner ring of the third bearing (28) is mounted 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 step hole (2004) in the output shaft (6) of the output shaft assembly (200); The long circular groove of the third cylindrical surface (2303) is provided with long flat keys (40) distributed laterally; A short circular groove is distributed transversely on the second cylindrical surface (2302); The short circular groove of the second cylindrical surface (2302) is provided with short flat keys (39) distributed laterally; An eccentric sleeve (19) is provided on the circumferential outer side of the third cylindrical surface (2303).

5. The friction reducer according to claim 2, characterized in that: The eccentric sleeve (19) comprises two eccentric cylindrical surfaces, namely a first eccentric sleeve cylindrical surface (1904) and a second eccentric sleeve cylindrical surface (1905); A clamping groove (1903) is circumferentially arranged on the outer surface of the right end of the cylindrical surface (1905) of the second eccentric sleeve; A second clamping groove (1903) is used to set a second shaft retaining ring (37); The eccentric sleeve (19) is provided with an eccentric sleeve circular cavity (1901) and a rectangular limiting groove (1902) which are distributed transversely and penetrate the eccentric sleeve. The square limiting groove (1902) is located on the inner wall of the circular cavity (1901) of the eccentric sleeve; The third cylindrical surface (2303) of the input shaft (23) transversely passes through the eccentric sleeve circular cavity (1901) of the eccentric sleeve (19); The third cylindrical surface (2303) is connected to the square limiting groove (1902) via a long flat key (40) provided thereon; and / or, A first circular cavity (1713) is disposed transversely through the center of the first external gear (171); The first external gear (171) is evenly provided with eight first circular holes (1711) extending transversely therethrough on the annular plane; A circle of first teeth (1712) is arranged on the outer periphery of the first external gear (171); The outer ring of the first bearing (311) is arranged on the first circular cavity (1713) of the first external gear (171); The inner ring of the first bearing (311) is arranged on the second eccentric sleeve cylindrical surface (1905) of the eccentric sleeve (19), so that the first external gear (171) and the eccentric sleeve (19) are linked; and / or, A second circular cavity (1723) is disposed transversely through the center of the second external gear (172); The second external gear (172) is evenly provided with eight second circular holes (1721) extending transversely therethrough on the annular plane; A circle of second teeth (1722) is arranged on the outer circumference of the second external gear (172); The outer ring of the second bearing (312) is arranged on the second circular cavity (1723) of the second external gear (172); The inner ring of the second bearing (312) is arranged on the first eccentric sleeve cylindrical surface (1904) of the eccentric sleeve (19), so that the second external gear (172) and the eccentric sleeve (19) are linked.

6. The friction reducer according to claim 2, characterized in that: The roller rod mounting circular hole (2003) and the right end of the roller rod (20) are interference fit; The rolling rod (20) and the rolling sleeve (21) are clearance-fitted; The middle part and the right end of the output shaft (6) are provided with an output shaft cylindrical surface (2001) on the circumferential outer side; Two fifth bearings (30) are mounted on the cylindrical surface (2001) of the output shaft; The inner rings of the two fifth bearings (30) are located on the output shaft cylindrical surface (2001) on the output shaft (6); 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 reducer part, the reducer gear (18) is mounted on the input shaft (23) of the input shaft assembly (100); A middle cavity (1801) is disposed transversely through the center of the reducer gear (18); The input shaft (23) of the input shaft assembly (100) is placed in the middle cavity (1801); A keyway (1802) is provided on the middle cavity (1801) of the reducer gear (18); The keyway (1802) is used to set a short flat key (39) on the input shaft (23) of the input shaft assembly (100), so that the reducer gear (18) and the input shaft (23) are linked; A first bearing mounting step hole (201) is provided on the speed reduction cover (2); A first bearing mounting step hole (201) for accommodating a fourth bearing (29); The outer ring of the fourth bearing (29) is placed in a reducer cavity (2000) provided on the inner side of 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); A small retaining ring (14) is provided between the fourth bearing (29) and the reducer gear (18); and / or, For the reducer part, a central through hole distributed laterally is arranged at the central position of the load-bearing plate (24); Eight load-balancing plate through holes (2401) are evenly arranged along the circumferential direction on the load-balancing plate (24); The through hole (2401) of the load-balancing plate is arranged correspondingly to the first circular hole (1711) and the second circular hole (1721) on the input shaft assembly (100), and the roller rod mounting circular hole (2003) on the output shaft assembly (200); The load balancing plate (24) is arranged on eight rollers (20) provided on the output shaft assembly (200) through eight load balancing plate through holes (2401); The roller (20) on the output shaft assembly (200) passes through the first circular hole (1711) and the second circular hole (1721) from right to left in sequence, and then the left end portion thereof is connected to the load-balancing plate through hole (2401) on the load-balancing plate (24); and / or, For the reducer part, an internal gear circular hole (505) is provided transversely through the center position of the internal gear (5); A circle of internal gear teeth (504) is arranged around the inner wall of the left end of the internal gear circular hole (505) of the internal gear (5); The first teeth (1712) on the outer periphery of the first external gear (171) and the second teeth (1722) on the outer periphery of the second external gear (172) of the input shaft assembly (100) are respectively meshed with the teeth (504) of the internal gear; An inner wall at the right end of the inner gear circular hole (505) is provided with an inner gear clamping groove (506) along the circumferential direction; A hole retaining ring (38) is arranged in the internal gear clamping groove (506) of the internal gear (5); 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); An oil stopper (22) is provided between the hole retaining ring (38) and the two fifth bearings (30) of the output shaft assembly (200); The right side of the hole retaining ring (38) provided on the internal gear (5) is surrounded by an oil-proof felt (26); An annular circular surface (501) is provided on the circumferential outer side of the left end of the internal 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 installation groove (507) of the internal gear (5) to achieve sealing between the internal gear (5) and the reduction housing (4); Six inner friction plate slots (503) are evenly distributed along the circumferential direction on the circumferential outer side of the right end of the internal gear (5).

7. The friction reducer according to claim 2, characterized in that: The third bolt (43) passes through the first bolt mounting through hole (202) of the reduction cover (2) and the second bolt mounting through hole (301) on the middle plate (3) from left to right in sequence, and is then threadedly fixedly connected to the first threaded connection hole (4031) on the reduction housing (4); and / or, An annular third spring washer (47) and an annular third flat washer (45) are arranged on the third bolt (43); and / or, The reduction housing (4) is provided with a reduction housing threaded hole (405); The carrying handle (51) is connected to the reduction housing (4) through the reduction housing threaded hole (405); and / or, The top of the reduction housing (4) is provided with a limiting groove (401) and a reduction housing threaded connection hole (402); The locking plate (11) is fixedly connected to the reduction housing (4) via a fourth bolt (44); and / or, The locking piece (11) comprises a mounting edge (1103); A locking piece installation groove (1101) is provided on the installation edge (1103); The mounting edge (1103) of the locking piece (11) is arranged on the limiting groove (401) of the reduction housing (4); After the fourth bolt (44) passes through the locking piece installation groove (1101) of the locking piece (11), it is threadedly fixedly connected with the reduction housing threaded connection hole (402) on the reduction housing (4); and / or, A plurality of compression spring mounting holes (406) are arranged on the right side of the reduction housing (4) and extend transversely therethrough; A compression spring (10) provided in the disc-type friction coupling part is arranged in each compression spring installation hole (406); and / or, For the disc-type friction coupling part, a compression spring (10) is respectively arranged in each compression spring mounting hole (406) of the reduction housing (4); A compression spring (10) contacts the left side of the adjacent friction group; The outer periphery of the fixed chuck (7) is provided with three protruding fourth shoulders; A fixing chuck bolt mounting through hole (701) is provided on each fourth shaft shoulder; Six outer friction plate slots (702) are evenly distributed on the inner cavity of the fixed chuck (7); A first adjusting external thread (704) is provided on the outer cylindrical surface of the fixed chuck (7); A second O-ring mounting groove (703) is provided on the fixed chuck (7); A 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 to the reduction housing (4) via three second bolts (42).

8. The friction reducer according to claim 2, characterized in that: For the disc-type friction coupling part, each outer friction plate (9) is surrounded by six outer friction plate outer protrusions (901) distributed at equal intervals; Six inner friction plate inner protrusions (101) are arranged around the inner side of the central through hole of each inner friction plate (1) and are distributed at equal intervals; At least two outer friction plates (9) and at least one inner friction plate (1) are alternately placed in the inner cavity of the fixed chuck (7) and arranged on the outer side of the right end of the inner gear (5); An internal 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 slot (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 slot (503) of the internal gear (5); and / or, For the disc friction coupling part, a second adjusting internal thread (803) is arranged on the inner cavity of the groove nut (8); The groove nut (8) is threadedly fixedly connected to the first adjusting external thread (704) on the fixed chuck (7) via the second adjusting internal thread (803) thereon.

9. The friction reducer according to claim 8, characterized in that: The inner friction plate (1) has friction surfaces on its left and right sides respectively; The friction surface is provided with radially distributed chip removal grooves (102); and / or, An L-shaped sealing ring (13) is provided between the groove pressing nut (8) and the fixed chuck (7) to achieve sealing between the groove pressing nut (8) and the fixed chuck (7); and / or, The inner cavity of the groove nut (8) is provided with an inner cavity step (807); The inner cavity step (807) is provided with a thrust bearing (32); The groove nut (8) is provided with groove nut step holes (805) that are distributed transversely and penetrate through the groove nut; A dust ring (35) is provided on the groove nut step hole (805) for achieving sealing between the groove nut (8) and the output shaft (6) in the output shaft assembly (200); and / or, A plurality of rectangular slots (801) are evenly arranged on the outer periphery of the groove pressing nut (8); The right side surface of the groove nut (8) is evenly distributed along the circumference with six radially distributed rectangular protrusions (80); A locking nail (12) is provided at one end of a locking piece (11) connected to the top of the reduction housing (4); The locking pin (12) is arranged in any rectangular slot (801) on the outer periphery of the groove pressing nut (8); and / or, A convex portion is provided on the upper portion of the outer circumference of the speed reduction cover (2); A threaded mounting hole (203) is provided on the raised portion; An oil filling label (27) is arranged above the raised portion; An oil filling label (27) is fixedly connected to a raised portion on the speed reduction cover (2) via a first screw (41); and / or, Four rivet mounting holes (204) are arranged transversely through the deceleration cover (2); A nameplate (16) is provided on the left side of the speed reduction cover (2); 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 to the speed reduction cover (2) via four rivets (49); The rivet (49) passes through the nameplate mounting through hole on the nameplate (16) and is fixedly connected to the rivet mounting hole (204) at the corresponding position.

10. The friction reducer according to any one of claims 1 to 9, characterized in that: The reducer gear (18) is meshed with the existing motor gear in the electric switch machine located outside; The speed reduction cover (2) is provided with a motor docking hole (300); After the output shaft of the original motor in the electric switch machine passes through the motor docking hole (300) transversely, a motor gear is installed at the right end thereof; The motor gear is meshedly connected 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.

Images