CN-121993555-A - Cycloidal needle wheel disc type speed reducer and electric switch machine

CN121993555ACN 121993555 ACN121993555 ACN 121993555ACN-121993555-A

Abstract

The invention discloses a cycloidal needle wheel type speed reducer and an electric switch machine, wherein the cycloidal needle wheel type speed reducer comprises a speed reducing shell, a hollow needle tooth shell is arranged in the speed reducing shell, a middle plate and a speed reducing cover are sequentially arranged on the right side of the speed reducing shell from left to right, a fixed chuck is arranged on the left side of the speed reducing shell, the left end of the fixed chuck is circumferentially and externally connected with a groove pressing nut in a threaded manner, an eccentric shaft which is transversely distributed is pivoted in an inner cavity of the fixed chuck, an inner cavity of the needle tooth shell in the speed reducing shell, an inner cavity of the middle plate and an inner cavity of the speed reducing cover, an output shaft is arranged in the inner cavity of the needle tooth shell, the eccentric shaft is connected with the output shaft in a linkage manner, at least one static friction plate and at least one dynamic friction plate are arranged on the left end of the needle tooth shell circumferentially and externally arranged alternately. The cycloidal needle wheel type speed reducer and the electric switch machine disclosed by the invention have the advantages of scientific and reasonable structural design, stable transmission and strong bearing capacity, and are beneficial to ensuring longer service life.

Inventors

LI YAN
WEI YING
LI WANGLONG
CHEN SHUO
YAO HAILONG
CHEN FUBIN
MA CHAOYANG
JIN TIEHAO
LI LINLIN
DU CHENGLONG

Assignees

天津铁路信号有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260209

Claims (10)

1. A cycloidal pin gear type speed reducer is characterized by comprising a speed reducing shell (7); A hollow needle gear shell (6) is arranged in the speed reducing shell (7); The right side of the speed reduction shell (7) is provided with an intermediate plate (3) and a speed reduction cover (1) in sequence from left to right; A fixed chuck (10) is arranged on the left side of the speed reduction shell (7); The left end of the fixed chuck (10) is circumferentially and externally provided with a groove pressing nut (13) in a threaded connection manner; An inner cavity of the fixed chuck (10), an inner cavity of the needle gear shell (6) in the speed reduction shell (7), an inner cavity of the middle plate (3) and an inner cavity of the speed reduction cover (1) are pivoted with eccentric shafts (8) which are transversely distributed; An output shaft (15) is arranged in the inner cavity of the needle gear shell (6); the eccentric shaft (8) is connected with the output shaft (15) in a linkage way; At least one static friction plate (11) and at least one dynamic friction plate (12) are arranged on the left end circumference outside of the needle gear housing (6); The static friction plates (11) and the dynamic friction plates (12) are alternately arranged on the left end circumference outside of the needle gear shell (6).
2. The cycloidal pin gear type speed reducer according to claim 1, wherein the intermediate plate (3), the speed reducing cover (1) and the speed reducing case (7) are fixedly connected by socket head cap bolts; The fixed chuck (10) is fixedly connected with the speed reduction shell (7) through an inner hexagon bolt; Three bolt fixing holes (20) are respectively distributed on the outer sides of the periphery of the speed reduction cover (1), the middle plate (3), the speed reduction shell (7) and the fixing chuck (10); Three bolt fixing holes (20) on the speed reducing cover (1), the middle plate (3), the speed reducing shell (7) and the fixing chuck (10) are correspondingly arranged in positions; The inner hexagon bolts pass through bolt fixing holes (20) on the corresponding speed reduction cover (1), the middle plate (3), the speed reduction shell (7) and the fixing chuck (10) and are fixedly connected with the fastening nuts through threads.
3. The cycloidal pin gear type speed reducer according to claim 1, wherein a speed reduction cover bearing mounting groove (1001) is provided at a center position of the speed reduction cover (1); a first sealing bearing (91) is arranged in the speed reduction cover bearing mounting groove (1001); an output shaft (15) is arranged in the inner cavity of the needle gear shell (6); the inner cavity of the left end of the needle gear shell (6) is circumferentially provided with two main bearings (14); The inner rings of the two main bearings (14) are connected with the left end of the output shaft (15) circumferentially outwards; the inner cavity of the right end of the output shaft (15) is provided with a second sealing bearing (92); an inner ring of the second sealing bearing (92) is connected with the left end of the eccentric shaft (8); an inner ring of the first sealing bearing (91) is connected with the right end of the eccentric shaft (8); a large gear (2) is arranged between the middle plate (3) and the speed reducing cover (1); The large gear (2) is connected with a large gear mounting section (81) on the eccentric shaft (8).
4. Cycloidal pin gear type speed reducer according to claim 1, characterized in that two cycloidal gears (4) are arranged in the right end cavity of the pin gear housing (6); The two cycloidal gears (4) are positioned on the right side of an output shaft (15) arranged in the inner cavity of the needle gear housing (6); The eccentric shaft (8) is provided with a first cycloid gear mounting section (82) and a second cycloid gear mounting section (83) at positions corresponding to the central through holes of the two cycloid gears (4); The first cycloidal gear mounting section (82) is positioned on the left side of the second cycloidal gear mounting section (83); The first cycloid gear mounting section (82) and the second cycloid gear mounting section (83) are provided with two third bearings (93) between the first cycloid gear mounting section and the center through holes of the two cycloid gears (4).
5. The cycloidal pin gear type speed reducer according to claim 4, wherein the right end of the output shaft (15) is provided with a transversely distributed roller mounting hole (151); Each roller rod mounting hole (151) is respectively connected with the left end of a transversely distributed roller rod (16); The right end of each rolling rod (16) is connected with the same connecting ring (18); two cycloidal gears (4) are positioned between the right end surface of the output shaft (15) and the connecting ring (18).
6. The cycloidal pin gear type speed reducer according to claim 5, wherein each roller (16) is respectively sleeved with a roller sleeve (17) at the outer side of a part between the right end surface of the output shaft (15) and the left side surface of the connecting ring (18); the cycloid wheel (4) is provided with a roller mounting through hole (41) at a position corresponding to each roller (17); The plurality of roller mounting through holes (41) on the two cycloid gears (4) are symmetrically arranged left and right; each roller (17) transversely penetrates through the roller mounting through holes (41) on the two cycloid gears (4); and/or the number of the groups of groups, A plurality of gear teeth are uniformly distributed on the circumferential outer side of the cycloid gear (4), and a tooth slot is arranged between any two adjacent gear teeth; A pin tooth pin mounting groove (61) is arranged on the side wall of the periphery of the right end cavity of the pin tooth shell (6) at the position corresponding to the tooth groove on each cycloidal gear (4); A pin tooth pin (5) is respectively arranged between the tooth groove on each cycloid gear (4) and the pin tooth pin mounting groove (61) corresponding to the position.
7. The cycloidal pin gear type speed reducer according to claim 1, wherein a plurality of dynamic friction plate positioning projections (121) are uniformly distributed around the inside of the center through hole of the dynamic friction plate (12); A movable friction plate mounting groove (62) is respectively arranged on the left end circumference outside of the needle gear shell (6) at a position corresponding to each movable friction plate positioning lug (121); The dynamic friction plate positioning convex blocks (121) are correspondingly connected with the dynamic friction plate mounting grooves (62).
8. The cycloidal pin gear type speed reducer according to claim 1, wherein the left end of the stationary chuck (10) is circumferentially outward surrounded by an external thread (101); an internal thread (131) is circumferentially arranged on the inner side of the right end cavity of the groove pressing nut (13); An internal thread (131) on the groove pressing nut (13) is fixedly connected with the internal thread on the fixed chuck (10) through threads; the right side surface of the groove pressing nut (13) is contacted with the left side surface of the adjacent static friction plate (11) positioned on the right side of the groove pressing nut.
9. The cycloidal pin gear type speed reducer according to claim 1, characterized in that a plurality of left-side opening compression spring mounting grooves (71) are circumferentially provided at the left end of the speed reducing case (7); The compressed spring mounting grooves (71) are internally provided with compressed springs (19) which are transversely distributed; The left end of the pressure spring (19) is contacted with the right side surface of the adjacent static friction plate (11) positioned on the left side.
10. An electric switch machine comprising a cycloidal pin gear type speed reducer according to any one of claims 1 to 9.

Description

Cycloidal needle wheel disc type speed reducer and electric switch machine Technical Field The invention relates to the technical field of railway turnout switching equipment, in particular to a cycloidal needle wheel disc type speed reducer and an electric switch machine. Background The switch machine is an important signal basic device for reliably switching the switch position, changing the switch opening direction, locking the switch tongue and reflecting the switch position, and can well ensure the driving safety, improve the transportation efficiency and improve the labor intensity of driving personnel. At present, the environment of a switch machine applied to a railway is complex, along with the high-speed development of the railway, the frequency of a train passing through a switch is increased, the switch conversion frequency is increased, the maintenance workload of field personnel is increased, the design of the original traditional speed reducer on the switch machine is unreasonable, the transmission is unstable, the service life is short, and the requirement of a user cannot be met. It should be noted that, the original traditional speed reducer on the switch machine is a motor speed reducer, which is used for converting the high-speed low torque output by the motor in the switch machine into low-speed high torque power suitable for driving the switch to switch, reducing the rotation speed and increasing the torque, and the speed reducer is provided with a friction pair part to play a role in protecting the motor, for example, when the switch is blocked, the motor and the gear are protected through slipping. Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Disclosure of Invention The invention aims at overcoming the technical defects existing in the prior art and provides a cycloidal needle wheel type speed reducer and an electric switch machine. For this purpose, the invention provides a cycloidal pin gear type speed reducer, which comprises a speed reducing shell; A hollow needle gear shell is arranged in the speed reducing shell; The right side of the speed reduction shell is provided with a middle plate and a speed reduction cover in sequence from left to right; a fixed chuck is arranged on the left side of the speed reduction shell; The left end of the fixed chuck is circumferentially and externally provided with a groove pressing nut in a threaded connection manner; An inner cavity of the fixed chuck, an inner cavity of the pin gear shell in the speed reduction shell, an inner cavity of the middle plate and an inner cavity of the speed reduction cover are pivoted with eccentric shafts which are transversely distributed; An output shaft is arranged in the inner cavity of the needle gear shell; the eccentric shaft is connected with the output shaft in a linkage way; At least one static friction plate and at least one dynamic friction plate are arranged on the outer side of the circumference of the left end of the pin gear shell; the static friction plate and the dynamic friction plate are alternately arranged on the left end circumference outside of the needle gear shell. In addition, the invention also provides an electric switch machine which comprises the cycloidal pin-wheel type speed reducer. Compared with the prior art, the cycloidal needle wheel disc type speed reducer and the electric switch machine provided by the invention have the advantages of scientific and reasonable structural design, stable transmission, strong bearing capacity, contribution to ensuring longer service life and great practical significance. Through inspection, the cycloidal pin gear type speed reducer provided by the invention is a cycloidal pin gear speed reducer, has stronger bearing capacity, more stable transmission and smooth tooth profile curve of cycloidal gears compared with the traditional speed reducer, obviously reduces the wear speed in the use process and has longer service life. The design of the invention can ensure the accurate transmission, stable operation and high transmission efficiency of the electric switch machine speed reducer, and prolong the service life of the electric switch machine speed reducer. Drawings FIG. 1a is a perspective exploded view of a cycloidal pin gear type speed reducer according to the present invention; FIG. 1b is a cross-sectional view of a cycloidal pin gear type speed reducer provided by the present invention; fig. 1c is an external perspective three-dimensional view of a cycloidal pin gear type speed reducer provided by the invention; FIG. 2a is a right side view of the reduction cap; FIG. 2b is a cross-sectional view of the reduction cap; FIG. 3 is a schematic structural view of a large gear; FIG. 4a is a cross-sectional view of an intermediate plate; FIG. 4b is a right side view of the intermediate plate; FIG. 5 is a right side view of the cycloidal gear; FIG. 6a is a front view of the needle gear hous