Cycloidal pin wheel disc type speed reducer and electric switch machine

Abstract

The invention discloses a cycloidal pin wheel disc type speed reducer and an electric switch machine. The cycloidal pin wheel disc type speed reducer comprises a speed reduction shell. A hollow pin wheel housing is arranged in the speed reduction housing; a middle plate and a speed reduction cover are sequentially arranged on the right side of the speed reduction shell from left to right. A fixed chuck is arranged on the left side of the deceleration shell; the circumferential outer side of the left end of the fixed chuck is in threaded connection with a groove pressing nut; transversely distributed eccentric shafts are pivoted to an inner cavity of the fixed chuck, an inner cavity of a pin wheel housing in the speed reduction housing, an inner cavity of the middle plate and an inner cavity of the speed reduction cover; an output shaft is arranged in an inner cavity of the pin wheel housing; the eccentric shaft is in linkage connection with the output shaft; at least one static friction plate and at least one dynamic friction plate are arranged on the circumferential outer side of the left end of the pin wheel housing; and the static friction plates and the dynamic friction plates are alternately mounted. According to the cycloidal pin wheel disc type speed reducer and the electric switch machine, the structural design is scientific and reasonable, transmission is stable, the bearing capacity is high, and it is facilitated that the service life is long.

Description

Technical Field

[0001] This invention relates to the field of railway turnout switching equipment technology, and in particular to a cycloidal pinwheel disc reducer and an electric switch machine. Background Technology

[0002] A switch machine is an important signaling infrastructure used to reliably change the position of a turnout, change the direction of the turnout, lock the turnout switch rail, and reflect the position of the turnout. It can effectively ensure traffic safety, improve transportation efficiency, and reduce the labor intensity of traffic operators.

[0003] Currently, the switch machines used on railways operate in complex environments. With the rapid development of railways, the frequency of trains passing through switches has increased, as has the frequency of switch switching. This has led to a greater workload for on-site maintenance personnel. The original traditional reducer design on switch machines is unreasonable, resulting in unstable transmission, short service life, and an inability to meet user needs.

[0004] It should be noted that the original traditional reducer on the switch machine was a motor reducer, which was used to convert the high-speed, low-torque output of the motor in the switch machine into a low-speed, high-torque power suitable for driving the turnout switching, reducing the speed and increasing the torque. The reducer has a friction pair to protect the motor. For example, when the turnout switching is obstructed, the motor and gears are protected by slippage.

[0005] Therefore, there is an urgent need to develop a technology that can solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to address the technical deficiencies of existing technologies by providing a cycloidal pinwheel reducer and an electric switch machine.

[0007] Therefore, the present invention provides a cycloidal pinwheel reducer, including a reduction housing; The inside of the reduction gear housing is equipped with a hollow needle-tooth shell; On the right side of the reduction gear housing, from left to right, there is a middle plate and a reduction gear cover; A fixed chuck is provided on the left side of the reduction gear housing; The left end of the fixed chuck is circumferentially outward, with a grooved pressure nut threaded onto it; The inner cavity of the fixed chuck, the inner cavity of the needle tooth housing in the reduction housing, the inner cavity of the intermediate plate, and the inner cavity of the reduction cover are pivotally connected to transversely distributed eccentric shafts. The inner cavity of the needle housing is equipped with an output shaft; The eccentric shaft is linked to the output shaft; The left end of the needle tooth shell is provided with at least one static friction plate and at least one dynamic friction plate circumferentially outward; The static friction plate and the dynamic friction plate are alternately installed on the outer circumference of the left end of the needle tooth housing.

[0008] In addition, the present invention also provides an electric switch machine, including the cycloidal pinwheel disc reducer as described above.

[0009] As can be seen from the technical solutions provided by the present invention above, compared with the prior art, the present invention provides a cycloidal pinwheel disc reducer and an electric switch machine with a scientific and reasonable structural design, smooth transmission, strong load-bearing capacity, which is conducive to ensuring a long service life and has significant practical significance.

[0010] After testing, the cycloidal pinwheel disc reducer provided by this invention is a cycloidal pinwheel reducer that has a stronger load-bearing capacity, smoother transmission, and a smoother tooth profile curve of the cycloidal wheel compared to traditional reducers. This significantly reduces the wear rate during use and extends the service life. The design of this invention ensures precise transmission, smooth operation, and high transmission efficiency in the electric switch machine reducer, thereby improving the service life of the electric switch machine reducer. Attached Figure Description

[0011] Figure 1a An exploded perspective view of a cycloidal pinwheel reducer provided by the present invention; Figure 1b A cross-sectional view of a cycloidal pinwheel reducer provided by the present invention; Figure 1c A three-dimensional view of the appearance of a cycloidal pinwheel disc reducer provided by the present invention; Figure 2a This is a right view of the speed reduction cover; Figure 2b This is a cross-sectional view of the speed reduction cover; Figure 3 This is a schematic diagram of the structure of the large gear; Figure 4a This is a sectional view of the middle plate; Figure 4b This is the right view of the middle plate; Figure 5 This is a right view of the cycloidal wheel; Figure 6a This is the front view of the needle-tooth shell; Figure 6b This is a cross-sectional view of the needle-tooth shell; Figure 7 This is a schematic diagram of the pin tooth structure; Figure 8a This is the left view of the deceleration housing; Figure 8b This is the left view of the deceleration housing; Figure 9 This is a schematic diagram of the eccentric shaft structure; Figure 10a Main view of the fixed chuck; Figure 10b A sectional view of the fixed chuck; Figure 11 This is a schematic diagram of the static friction plate. Figure 12 This is a schematic diagram of the dynamic friction plate. Figure 13a This is a cross-sectional view of the grooved nut; Figure 13b This is the left view of the grooved nut; Figure 14 This is a schematic diagram of the output shaft. Figure 15 A schematic diagram of the installation state of a cycloidal pinwheel reducer on an electric switch machine provided by the present invention; Figure 16 Schematic diagram 2 of the installation state of a cycloidal pinwheel reducer on an electric switch machine provided by the present invention; In the diagram, 1-reduction gear cover, 2-large gear, 3-intermediate plate, 4-cycloidal wheel, 5-pin tooth pin. 6-Needle tooth housing, 7-Reduction housing, 8-Eccentric shaft, 91-First sealed bearing, 92-Second sealed bearing, 93-Third bearing; 10-Fixed chuck, 11-Static friction plate, 12-Dynamic friction plate, 13-Groove pressure nut, 14-Main bearing, 15-Output shaft. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0014] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0016] See Figure 1 to Figure 16 The present invention provides a cycloidal pinwheel disc reducer, which is applied in an electric switch machine, and includes a reduction housing 7; Inside the deceleration housing 7, there is a hollow needle-tooth housing 6; On the right side of the deceleration housing 7, from left to right, there are a middle plate 3 and a deceleration cover 1; A fixed chuck 10 is provided on the left side of the reduction housing 7; The left end of the fixed chuck 10 is circumferentially outward, and is threaded with a grooved pressure nut 13; The inner cavity of the fixed chuck 10, the inner cavity of the needle tooth shell 6 in the deceleration housing 7, the inner cavity of the intermediate plate 3, and the inner cavity of the deceleration cover 1 are pivotally (rotatably connected) to the transversely distributed eccentric shafts 8. The inner cavity of the needle housing 6 is provided with an output shaft 15 (specifically, the output shaft 15 is rotatably provided); The eccentric shaft 8 is linked to the output shaft 15; At least one static friction plate 11 and at least one dynamic friction plate 12 are provided on the outer circumferential side of the left end of the needle tooth shell 6. The static friction plate 11 and the dynamic friction plate 12 are alternately (i.e., alternately installed on the left side of the needle tooth housing 6) circumferentially outward.

[0017] In this invention, specifically, the intermediate plate 3, the deceleration cover 1, and the deceleration housing 7 are fixedly connected by internal hex bolts.

[0018] The fixed chuck 10 and the reduction housing 7 are fixedly connected by internal hex bolts.

[0019] For specific implementation details, see [link to implementation details]. Figure 2a , Figure 4b , Figure 8b and Figure 10aAs shown, three bolt fixing holes 20 are distributed on the outer sides of the deceleration cover 1, the intermediate plate 3, the deceleration housing 7 and the fixing chuck 10, respectively. The positions of the three bolt fixing holes 20 on the deceleration cover 1, the intermediate plate 3, the deceleration housing 7, and the fixed chuck 10 are set accordingly; After the internal hex bolt passes through the bolt fixing hole 20 on the corresponding position of the deceleration cover 1, intermediate plate 3, deceleration housing 7 and fixing chuck 10, it is threadedly fixed to the fastening nut.

[0020] It should be noted that in this invention, the dynamic friction plate 12 is used to contact the static friction plate 11 to generate friction.

[0021] In this invention, specifically, a deceleration cover bearing mounting groove 1001 is provided at the center of the deceleration cover 1; A first sealed bearing 91 is installed in the bearing mounting groove 1001 of the deceleration cover; An output shaft 15 is provided in the inner cavity of the needle housing 6; Two main bearings 14 are arranged around the inner cavity of the left end of the needle tooth housing 6; The inner rings of the two main bearings 14 are circumferentially connected to the left end of the output shaft 15. A second sealed bearing 92 is provided in the inner cavity of the right end of the output shaft 15; The inner ring of the second sealed bearing 92 is connected to the left end of the eccentric shaft 8; The inner ring of the first sealed bearing 91 is connected to the right end of the eccentric shaft 8.

[0022] In practice, there is a large gear 2 between the intermediate plate 3 and the speed reduction cover 1; The large gear 2 is connected to the large gear mounting section 81 on the eccentric shaft 8; It should be noted that, in this invention, the large gear 2 installed on the eccentric shaft 8 meshes with the small gear installed on the original motor output shaft inside the switch machine located outside, thereby transmitting the power of the motor to the eccentric shaft.

[0023] Furthermore, for the cycloidal pinwheel reducer, the reduction cover 1 has an opening at a position corresponding to the large gear; The small gear installed on the original motor output shaft inside the switch machine extends into the gearbox through this opening and meshes with the large gear, so that the motor can drive the large gear 2.

[0024] Furthermore, a key 810 is provided on the large gear mounting section 81 on the eccentric shaft 8; An eccentric shaft mounting groove 201 is provided at the center through hole of the large gear 2; The eccentric shaft mounting groove 201 of the large gear 2 is connected to the key 810 on the eccentric shaft 8.

[0025] It should be noted that, see Figure 1c As shown, an annular oil baffle 22 is provided on the left side of the leftmost main bearing 14; on the left side of the oil baffle 22, at least two annular felt pads 21 are provided. In this invention, specifically, two cycloidal wheels 4 are provided inside the cavity at the right end of the needle tooth shell 6; Two cycloidal wheels 4 are located to the right of the output shaft 15 inside the needle tooth housing 6; The eccentric shaft 8 is provided with a first cycloidal wheel mounting section 82 and a second cycloidal wheel mounting section 83 at a position corresponding to the central through hole of the two cycloidal wheels 4; The first cycloidal wheel mounting section 82 is located to the left of the second cycloidal wheel mounting section 83; The first cycloidal wheel mounting section 82 and the second cycloidal wheel mounting section 83 are provided with two third bearings 93 between them and the central through holes of the two cycloidal wheels 4; In specific implementation, a third bearing 93 is respectively provided on the outer circumferential side of the first cycloidal wheel mounting section 82 and the second cycloidal wheel mounting section 83; The outer rings of the two third bearings 93 are fixedly connected to the central through holes of the two cycloidal wheels 4. Specifically, the two cycloidal wheels 4 include a first cycloidal wheel and a second cycloidal wheel. The first cycloidal wheel mounting section 82 and the second cycloidal wheel mounting section 8 on the eccentric shaft 8 are respectively connected to the first cycloidal wheel and the second cycloidal wheel through a third bearing 93.

[0026] It should be noted that the first and second cycloidal wheels have identical shapes and structures. The two cycloidal wheels 4 are completely identical and are symmetrically installed along the eccentric axis, achieving static balance, reducing vibration, and improving load-bearing capacity.

[0027] It should be noted that the large gear 2 installed on the eccentric shaft 8 meshes with the small gear installed on the original motor output shaft inside the switch machine located outside, so as to reduce the motor speed and increase the torque.

[0028] The output shaft 15 is linked with the pin tooth pin 5 and the pin tooth housing 6 pin mounting groove 61 through the first cycloidal wheel cycloid and the second cycloidal wheel cycloid; In this invention, a large gear 2 is mounted on the eccentric shaft 8, which meshes with a small gear mounted on the original motor output shaft inside the switch machine located outside, to transmit the power of the motor; the two eccentric sections on the eccentric shaft 8 (i.e., the first cycloidal wheel mounting section 82 and the second cycloidal wheel mounting section 83) drive the two cycloidal wheels, causing them to perform a planetary motion of "revolution + rotation" around the center of the needle tooth shell 6, and transmit the power to the load.

[0029] For specific implementation details, see [link to implementation details]. Figure 14 As shown, the right end of the output shaft 15 is provided with transversely distributed roller mounting holes 151. Each roller mounting hole 151 is connected to the left end of a laterally distributed roller 16. The right end of each roller 16 is connected to the same connecting ring 18; Two cycloidal wheels 4 are located between the right end face of the output shaft 15 and the connecting ring 18.

[0030] Furthermore, each roller 16 is fitted with a sleeve 17 on the outer side of the portion between the right end face of the output shaft 15 and the left side face of the connecting ring 18. Each cycloidal wheel 4 has a roller sleeve mounting through hole 41 at a position corresponding to each roller sleeve 17; The multiple roller sleeve mounting holes 41 on the two cycloidal wheels 4 are arranged symmetrically on the left and right sides; Each roller 17 extends laterally through the roller mounting through-hole 41 on the two cycloidal wheels 4.

[0031] It should be noted that the output shaft 15 is connected to the cycloidal wheel 4 via the roller 16, the roller sleeve, and the connecting ring 18.

[0032] In practice, the cycloidal wheel 4 has multiple teeth evenly distributed on its outer circumference, and there is a tooth groove between any two adjacent teeth. On the right end cavity sidewall of the needle tooth housing 6, a needle tooth pin mounting groove 61 is provided at the position corresponding to the tooth groove on each cycloidal wheel 4. Each cycloidal wheel 4 has a toothed pin 5 between its toothed groove and the corresponding toothed pin mounting groove 61.

[0033] It should be noted that multiple pin mounting grooves 61 are evenly arranged around the right end cavity of the pin housing 6.

[0034] In this invention, specifically, the inner cavity sidewall of the fixed chuck 10 is provided with a plurality (e.g., six) static friction pad mounting and limiting grooves 102. Each static friction plate 11 is provided with a static friction plate limiting boss 111 at a position corresponding to each static friction plate mounting limiting groove 102; The static friction plate limiting boss 111 is connected to the static friction plate mounting limiting groove 102.

[0035] In this invention, specifically, multiple (e.g., six) dynamic friction pad positioning protrusions 121 are evenly distributed around the inner side of the central through hole of the dynamic friction pad 12. On the left end of the needle tooth shell 6, outwardly circumferentially, a dynamic friction plate mounting groove 62 is provided at a position corresponding to each dynamic friction plate positioning protrusion 121; The positioning protrusion 121 of the moving friction plate is connected to the mounting groove 62 of the moving friction plate.

[0036] In this invention, specifically, the dynamic friction plate 12 and the static friction plate 11 are arranged alternately, comprising a total of four static friction plates and three static friction plates. In this invention, for specific implementation, see [link to relevant documentation]. Figure 10b As shown, the left end of the fixed chuck 10 is surrounded by an external thread 101 on the outer circumference. See Figure 13a As shown, an internal thread 131 is provided around the inner side of the cavity at the right end of the grooved nut 13. The internal thread 131 on the grooved nut 13 is threadedly fixedly connected to the internal thread on the fixed chuck 10.

[0037] It should be noted that the grooved nut 13 is screwed into the fixed chuck 10 by threads.

[0038] In practice, the right side of the groove pressure nut 13 is in contact with the left side of the adjacent static friction piece 11 located to its right (i.e., the leftmost static friction piece 11 among all the static friction pieces 11).

[0039] In practice, the left end of the grooved nut 13 has multiple rectangular grooves 132 distributed at equal intervals along the circumference; It should be noted that the rectangular groove 132 is used to rotate and lock the grooved nut 13, so that the internal thread 131 of the grooved nut 13 is threadedly fixedly connected to the external thread 101 of the fixed chuck 10.

[0040] It should be noted that a dedicated friction wrench, commonly used in existing switch machines, can be used to connect the rectangular groove 132. This allows the rotating groove nut 13 to be threadedly and securely connected to the external thread 101 of the fixed chuck 10 via its internal thread 131. Rotating the wrench clockwise over the rectangular groove 132 on the groove nut 13 tightens the nut 13, increasing the friction of the reducer. Conversely, rotating the wrench counterclockwise over the rectangular groove 132 decreases the friction of the reducer.

[0041] In this invention, it should be noted that the invention includes a cycloidal pinwheel gear pair and a disc friction pair; wherein, the cycloidal pinwheel gear pair includes an eccentric shaft 8, a cycloidal wheel 4, a pin tooth housing 6, a pin tooth pin 5, and an output shaft 15; the disc friction pair includes a moving friction plate 12, a stationary friction plate 11, and a fixed chuck 10.

[0042] In this invention, for specific implementation, see [link to relevant documentation]. Figure 8b As shown, the left end of the deceleration housing 7 has multiple compression spring mounting slots 71 with left-side openings arranged circumferentially. Each compression spring mounting slot 71 is provided with a laterally distributed compression spring 19; The left end of the compression spring 19 is in contact with the right side of the adjacent static friction plate 11 located to its left (i.e., the rightmost static friction plate 11).

[0043] It should be noted that in this invention, the deceleration cover 1, the intermediate plate 3, and the deceleration housing 7 are tightened together with hexagonal screws to form a cavity; a bearing groove bearing (i.e., a first sealed bearing 91 installed in the bearing mounting groove 1001 of the deceleration cover) is provided at the deceleration cover 1 to support one end of the eccentric shaft 8. In this invention, the large gear 2 and the eccentric shaft 8 are connected by a key. The small gear installed on the original motor output shaft inside the external switch machine meshes with the large gear 2 to transmit the motor power to the eccentric shaft 8. In this invention, the eccentric shaft 8 is provided with an eccentric section (i.e., the first cycloidal wheel mounting section 82 and the second cycloidal wheel mounting section 83), and a third bearing 93 is installed at the eccentric section. The two cycloidal wheels 4 are mounted on the eccentric shaft 8 through the third bearing 93. The eccentric rotation drives the cycloidal wheels 4 to rotate in the cavity of the needle tooth housing 6 in cooperation with the needle tooth pin 5. The cycloidal wheel 4 is provided with eight roller sleeve mounting through holes 41, and eight roller sleeves 17 are provided in the eight roller sleeve mounting through holes 41. One side of the eight rollers 16 is pressed into the eight roller rod mounting holes 151 on the output shaft 15, and the other side of the eight rollers 16 is set in the cavity of the eight roller sleeves 17 in the eight roller sleeve mounting through holes 41 of the cycloidal wheel 4. The eccentric rotation of the cycloidal wheel 4 drives the eight rollers 16 to rotate around the center of the output shaft 15, and then the eight rollers 16 drive the output shaft 15 to rotate, thereby realizing power transmission.

[0044] In this invention, the deceleration housing 7 has twenty spring mounting slots 71 on one side. The fixed chuck 10 is fixed to the deceleration housing 7 by internal hex bolts. The static friction plate 11 is fixed in place by the static friction plate positioning point (i.e., the static friction plate limiting boss 111) cooperating with the friction plate mounting slot (i.e., the static friction plate mounting limiting slot 102) on the fixed chuck 10. The spring 19 presses on the surface of the static friction plate 11.

[0045] The moving friction plate 12 engages with the moving friction plate mounting groove 62 on the pin tooth housing 6 through the moving friction plate positioning point (i.e., the moving friction plate positioning protrusion 121). When the external load is too large or the turnout resistance is too large and exceeds the friction force between the moving and stationary friction plates, the output shaft 15 used to drive the external load or the turnout traction point cannot rotate. The rotation of the eccentric shaft 8 is transmitted to the pin tooth housing 6 through the cycloidal wheel 4, causing the pin tooth housing 6 to rotate. The pin tooth housing 6 drives the moving friction plate 12 to rotate, while the stationary friction plate 11 remains stationary. The pin tooth housing 6 rotates against the friction force between the moving friction plate 12 and the stationary friction plate 11, and the moving friction plate 12 and the stationary friction plate 11 begin to rub.

[0046] In this invention, the friction between the dynamic friction plate 12 and the static friction plate 11 is to prevent the eccentric shaft 8 from stopping rotation when the external load or the turnout resistance is too large and exceeds the friction force between the dynamic friction plate 12 and the static friction plate 11. This would cause the large gear installed on the eccentric shaft 8 and the small gear installed on the original motor output shaft in the switch machine to stop rotating, thereby causing the original motor in the switch machine to seize up and be damaged.

[0047] It should be noted that if the friction between the moving and stationary friction plates is too small and the external load is too large, the load may not be able to be pulled. Therefore, this invention needs to adjust the friction of the reducer (i.e., adjust the friction between the moving friction plate 12 and the stationary friction plate 11) according to the on-site application environment and the load of the turnout.

[0048] In specific implementation, for the present invention, the fixed chuck 10 is provided with an external thread 101, and the groove pressure nut 13 is provided with an internal thread 131. When the groove pressure nut 13 is tightened, the compression amount of the compression spring 19 increases, the pressure between the moving friction plate 12 and the stationary friction plate 11 increases, and the friction force between the moving friction plate 12 and the stationary friction plate 11 increases. It should be noted that, in the present invention, when the reducer is working normally, the moving and stationary friction plates do not rub against each other, the pin tooth housing 6 is essentially fixed, and the two main bearings 14 in the inner cavity of the left end of the pin tooth housing 6 serve to support the output shaft 15; the eccentric shaft 8 drives the roller 16 to rotate by rotating the cycloidal wheel 4, and transmits the power to the output shaft 15.

[0049] Based on the cycloidal pinwheel reducer provided by the present invention, the present invention also provides an electric switch machine, which includes the cycloidal pinwheel reducer as described above.

[0050] In specific implementation, the electric switch machine includes a hollow switch machine lower shell 21 with an open top; The top of the lower casing 21 of the switch machine is sealed with a switch machine cover (figure not shown). Inside the lower housing 21 of the switch machine, there is a cycloidal pinwheel reducer 1000 as described above.

[0051] To better understand the technical solution of the present invention, the working principle of the present invention is explained below.

[0052] In this invention, the large gear 2 is connected to the eccentric shaft 8 via a key, thereby driving the eccentric shaft 8 to rotate together; After the eccentric shaft 8 rotates, it drives the cycloidal wheel 4 to rotate inside the needle tooth housing 6 (including the needle tooth pin 5) through the third bearing 93. After the cycloidal wheel 4 rotates, it drives the connected output shaft 15 to rotate together through the roller 16 and the roller sleeve 17, thereby transmitting power. It should be noted that, for the present invention, the friction between the dynamic friction plate 12 and the static friction plate 11 can be adjusted by tightening or loosening the groove pressure nut 13 and adjusting the compression amount of the pressure spring 19.

[0053] In this invention, specifically, the electric switch machine capable of installing the cycloidal pinwheel reducer can be a technologically mature and widely used switch machine. For example, it can be a ZD6 type switch machine manufactured by Tianjin Railway Signal Co., Ltd. The cycloidal pinwheel reducer designed in this invention can replace the original reducer of the switch machine.

[0054] In this invention, specifically, the output shaft 15 is connected to the original main shaft of the switch machine located externally, and is used to transmit power to the main shaft of the switch machine to drive the main shaft to rotate. It should be noted that the connection structure design between the output shaft of the reducer inside the switch machine and the original main shaft of the switch machine is the original conventional structure design inside the switch machine (such as the ZD6 type switch machine produced by Tianjin Railway Signal Co., Ltd.), and will not be described in detail here.

[0055] It should be noted that, in this invention, the pin tooth shell 6 can be fixed in place by the friction of a disc-type friction pair (including a moving friction plate 12 and a stationary friction plate 11). The pin tooth shell 6 contains 42 pin tooth mounting slots 61 for placing pin tooth pins 5. The pin tooth shell 6 contains a first cycloidal wheel and a second cycloidal wheel. The pin tooth pins 5 in the pin tooth shell 6 mesh with the cycloidal teeth of the first and second cycloidal wheels. When the eccentric shaft 8 rotates one revolution, the first and second cycloidal wheels also perform one revolution of eccentric motion. The outer circumferential edges of the first and second cycloidal wheels have 41 cycloidal teeth, and the pin tooth shell 6 contains 42 pin tooth pins, differing by one tooth. Therefore, when the first and second cycloidal wheels perform one revolution of eccentric motion, the teeth of the first and second cycloidal wheels are misaligned by one tooth in the pin tooth shell 6. When the eccentric shaft 8 rotates clockwise 41 times, the cycloidal wheel rotates counterclockwise once, driving the output shaft 15 to rotate counterclockwise once. This completes the second stage of the reducer. At the same time, the output shaft 15 is connected to the original transmission mechanism (including the main shaft) inside the switch machine. After the reducer reduces speed in two stages, the output torque of the motor is amplified and then driven by the transmission mechanism to move the original supporting rods of the switch machine (such as the ZD6 type switch machine). The rods of the switch machine are connected to the turnout (specifically the traction position of the turnout), thereby completing the turnout switching.

[0056] In this invention, the moving friction plate 12 is positioned on the pin tooth housing 6 via its positioning point (i.e., the moving friction plate positioning protrusion 121), and the stationary friction plate 11 is fixed to the fixed chuck 10 via its positioning point (i.e., the stationary friction plate limiting protrusion 111). The fixed chuck 10 is fixed to the reduction housing 7 by bolts, and the reduction housing 7 is fixed to the bottom housing of the external switch machine (e.g., a ZD6 type switch machine) by bolts. The stationary friction plate 11 and the moving friction plate 12 are alternately placed on the fixed chuck 10 and the pin tooth housing 6.

[0057] In this invention, twenty compression springs 19 are provided between the friction pair composed of static friction plate 11 and dynamic friction plate 12 and the reduction housing 7. The grooved pressure nut 13 is connected to the fixed chuck 10 via an adjusting thread. If the grooved pressure nut 13 is tightened, it compresses the friction pair composed of static friction plate 11 and dynamic friction plate 23, thereby compressing the compression springs 19. The pressure F1 between the friction pairs increases. When the friction coefficient f of the friction group is constant, the frictional force between the friction groups is F = F1. Therefore, the frictional force of the friction pair composed of the static friction plate 11 and the moving friction plate 12 increases. If the grooved pressure nut 13 is loosened, the compression spring 19 between the friction pair composed of the static friction plate 11 and the moving friction plate 12 and the reduction housing 7 is released, the pressure F1 between the friction pairs decreases, and the frictional force of the friction pair composed of the static friction plate 11 and the moving friction plate 12 decreases. Therefore, tightening the grooved pressure nut 13 can increase the frictional force of the friction pair composed of the static friction plate 11 and the moving friction plate 12; while loosening the grooved pressure nut can decrease the frictional force of the friction pair composed of the static friction plate 11 and the moving friction plate 12.

[0058] To better understand the technical solution of the present invention, the working principle of the present invention is explained below.

[0059] In this invention, when the cycloidal pinwheel reducer provided by this invention is working normally, the pin tooth housing 6 is fixed to transmit torque, thereby driving the transmission mechanism of the switch machine (e.g., ZD6 type switch machine) to switch the turnout. At this time, the static friction plate 11 and the dynamic friction plate 23 do not slide relative to each other. The friction force between the static friction plate 11 and the dynamic friction plate 23 can be adjusted by adjusting the tightness of the groove pressure nut 13 and the fixed chuck 10, and by adjusting the compression of the compression spring 19.

[0060] When the turnout is obstructed and cannot be switched normally, the transmission mechanism of the switch machine (such as the ZD6 type switch machine) will be stuck and unable to move. At this time, the output shaft of the cycloidal pinwheel disc reducer connected to the transmission mechanism of the switch machine will also be stuck and unable to move. At this time, the motor of the switch machine is still rotating at high speed. The gear installed on the output shaft of the motor drives the large gear 2 on the cycloidal pinwheel disc reducer to rotate. The large gear 2 drives the eccentric shaft 8 installed on it to rotate through the key. The eccentric shaft 8 drives the first cycloidal wheel and the second cycloidal wheel to perform cycloidal rotation through the two third bearings 93 installed on it. The output shaft 15 is fixed and the roller 16 fixed on the output shaft 15 is fixed. The first cycloidal wheel and the second cycloidal wheel drive the pin gear housing 6 to rotate. During the rotation, the pin gear housing 6 drives the moving friction plate 12 installed on it to rotate. The fixed chuck 10 is fixed to the bottom shell of the switch machine (e.g., ZD6 type switch machine) through the reduction housing 7. The static friction plate 11 installed on the fixed chuck 10 is fixed. At this time, the moving friction plate 12 and the static friction plate 11 slide relative to each other, thereby consuming the power of the switch machine motor, protecting the switch machine motor from being burned out, and realizing the overload protection function of the cycloidal pinwheel disc reducer.

[0061] It should be noted that the function of existing traditional reducers is the same as the basic function of the cycloidal pinwheel reducer of this invention. Both reduce the speed in two stages, amplify the output torque of the motor, and then drive the original supporting rods of the switch machine (such as the ZD6 type switch machine) to move through the transmission mechanism. The rods of the switch machine are connected to the turnout, thereby completing the switch conversion. It can also realize the overload protection function to protect the motor.

[0062] In summary, compared with the prior art, the present invention provides a cycloidal pinwheel disc reducer and an electric switch machine with a scientific and reasonable structural design, smooth transmission, strong load-bearing capacity, and is conducive to ensuring a long service life, which has significant practical significance.

[0063] After testing, the cycloidal pinwheel disc reducer provided by this invention is a cycloidal pinwheel reducer that has a stronger load-bearing capacity, smoother transmission, and a smoother tooth profile curve of the cycloidal wheel compared to traditional reducers. This significantly reduces the wear rate during use and extends the service life. The design of this invention ensures precise transmission, smooth operation, and high transmission efficiency in the electric switch machine reducer, thereby improving the service life of the electric switch machine reducer.

[0064] It should be noted that the traditional reducer in the switch machine originally used a one-tooth-difference planetary gear transmission, while the cycloidal pinwheel disc reducer of the present invention uses a cycloidal pinwheel transmission. The cycloidal wheel and the pinwheel (which includes 42 pin teeth) of the cycloidal pinwheel reducer have full tooth surface contact, while the gears in the one-tooth-difference planetary gear transmission of the traditional reducer have point-line contact. As a result, the stress distribution of the cycloidal pinwheel of the present invention is more balanced, which can effectively disperse the load and reduce local stress.

[0065] Furthermore, given that the cycloidal pinwheel reducer has full tooth surface contact between the cycloidal wheel and the pinwheel, and the load is shared by multiple teeth, the force transmission during the transmission process is more continuous and uniform, avoiding local impacts; while the gears in the one-tooth difference planetary gear transmission used in traditional reducers have point-to-line contact, and the number of meshing teeth is small, which makes them prone to vibration due to concentrated force on the tooth surface.

[0066] In addition, the cycloidal teeth on the cycloidal wheel in the cycloidal pinwheel reducer mesh with the pin 5 to form a rolling friction pair. The friction coefficient is small, so there is basically no relative sliding in the meshing area and the wear is minimal. In the gear meshing process of the one-tooth difference planetary gear transmission used in traditional reducers, there is relative sliding friction, and due to point-line contact, the sliding friction wear is more obvious.

[0067] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A cycloidal pinwheel reducer, characterized in that, Including the deceleration housing (7); The inside of the deceleration housing (7) is provided with a hollow needle-tooth housing (6); On the right side of the deceleration housing (7), from left to right, there is a middle plate (3) and a deceleration cover (1). A fixed chuck (10) is provided on the left side of the deceleration housing (7). The left end of the fixed chuck (10) is circumferentially outward and threaded with a grooved pressure nut (13). The inner cavity of the fixed chuck (10), the inner cavity of the needle tooth shell (6) in the deceleration housing (7), the inner cavity of the intermediate plate (3) and the inner cavity of the deceleration cover (1) are pivotally connected to the transversely distributed eccentric shafts (8). The inner cavity of the needle housing (6) is provided with an output shaft (15); The eccentric shaft (8) is linked to the output shaft (15); The left end of the needle-tooth shell (6) is provided with at least one static friction plate (11) and at least one dynamic friction plate (12) circumferentially outward. The static friction plate (11) and the dynamic friction plate (12) are alternately installed on the left circumferential outer side of the needle tooth shell (6).

2. The cycloidal pinwheel reducer as described in claim 1, characterized in that, The intermediate plate (3), the deceleration cover (1) and the deceleration housing (7) are fixedly connected by internal hex bolts; The fixed chuck (10) and the reduction housing (7) are fixedly connected by internal hex bolts; Three bolt fixing holes (20) are distributed on the outer sides of the deceleration cover (1), the middle plate (3), the deceleration housing (7) and the fixing chuck (10); The positions of the three bolt fixing holes (20) on the deceleration cover (1), the intermediate plate (3), the deceleration housing (7) and the fixing chuck (10) are set accordingly; After the internal hex bolt passes through the bolt fixing holes (20) on the corresponding deceleration cover (1), intermediate plate (3), deceleration housing (7) and fixing chuck (10), it is threadedly fixed to the fastening nut.

3. The cycloidal pinwheel reducer as described in claim 1, characterized in that, A bearing mounting groove (1001) for the deceleration cover (1) is provided at the center position. A first sealed bearing (91) is installed in the bearing mounting groove (1001) of the deceleration cover; An output shaft (15) is provided in the inner cavity of the needle housing (6). Two main bearings (14) are arranged around the inner cavity of the left end of the needle tooth housing (6). The inner rings of the two main bearings (14) are circumferentially connected to the left end of the output shaft (15); A second sealed bearing (92) is provided in the inner cavity of the right end of the output shaft (15). The inner ring of the second sealed bearing (92) is connected to the left end of the eccentric shaft (8); The inner ring of the first sealed bearing (91) is connected to the right end of the eccentric shaft (8); There is a large gear (2) between the middle plate (3) and the speed reduction cover (1); The large gear (2) is connected to the large gear mounting section (81) on the eccentric shaft (8).

4. The cycloidal pinwheel reducer as described in claim 1, characterized in that, Two cycloidal wheels (4) are installed inside the cavity at the right end of the needle tooth shell (6). Two cycloidal wheels (4) are located to the right of the output shaft (15) inside the needle tooth housing (6); The eccentric shaft (8) is provided with a first cycloidal wheel mounting section (82) and a second cycloidal wheel mounting section (83) at the position corresponding to the central through hole of the two cycloidal wheels (4). The first cycloidal wheel mounting section (82) is located to the left of the second cycloidal wheel mounting section (83); The first cycloidal wheel mounting section (82) and the second cycloidal wheel mounting section (83) are provided with two third bearings (93) between the central through holes of the two cycloidal wheels (4).

5. The cycloidal pinwheel reducer as described in claim 4, characterized in that, The right end of the output shaft (15) is provided with transversely distributed roller mounting holes (151). Each roller mounting hole (151) is connected to the left end of a laterally distributed roller (16); The right end of each roller (16) is connected to the same connecting ring (18); Two cycloidal wheels (4) are located between the right end face of the output shaft (15) and the connecting ring (18).

6. The cycloidal pinwheel reducer as described in claim 5, characterized in that, Each roller (16) has a sleeve (17) fitted on the outer side of the portion between the right end face of the output shaft (15) and the left side face of the connecting ring (18). Each cycloidal wheel (4) has a roller mounting through hole (41) at a position corresponding to each roller sleeve (17). The multiple roller sleeve mounting holes (41) on the two cycloidal wheels (4) are arranged symmetrically on the left and right sides; Each roller sleeve (17) passes laterally through the roller sleeve mounting through hole (41) on the two cycloidal wheels (4). And / or, The cycloidal wheel (4) has multiple teeth evenly distributed on its outer circumference, and there is a tooth groove between any two adjacent teeth; On the right end cavity of the needle tooth housing (6), a needle tooth pin mounting groove (61) is provided at the position corresponding to the tooth groove on each cycloidal wheel (4) on the surrounding side wall. Each cycloidal wheel (4) has a toothed pin (5) between its toothed groove and the corresponding pin mounting groove (61).

7. The cycloidal pinwheel reducer as described in claim 1, characterized in that, Multiple dynamic friction pad positioning protrusions (121) are evenly distributed around the inner side of the central through hole of the dynamic friction pad (12). On the left side of the needle tooth shell (6), a moving friction plate mounting groove (62) is provided at a position corresponding to each moving friction plate positioning protrusion (121). The positioning protrusion (121) of the moving friction plate is connected to the mounting groove (62) of the moving friction plate.

8. The cycloidal pinwheel reducer as described in claim 1, characterized in that, The left end of the fixed chuck (10) is circumferentially outward and surrounded by external threads (101). The inner side of the right end cavity of the grooved nut (13) is provided with an internal thread (131). The internal thread (131) on the grooved nut (13) is threadedly fixedly connected to the internal thread on the fixed chuck (10); The right side of the groove pressure nut (13) is in contact with the left side of the adjacent static friction plate (11) located to its right.

9. The cycloidal pinwheel reducer as described in claim 1, characterized in that, The left end of the deceleration housing (7) is provided with multiple compression spring mounting slots (71) with left-side openings arranged around the circumference. Each compression spring mounting slot (71) is provided with a laterally distributed compression spring (19). The left end of the compression spring (19) is in contact with the right side of the adjacent static friction plate (11) located to its left.

10. An electric switch machine, characterized in that, Including the cycloidal pinwheel reducer as described in any one of claims 1 to 9.

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