Brake and speed reduction composite transmission device

Abstract

The utility model discloses a braking and speed-reducing composite transmission device which comprises a speed reducer, an input shaft sleeve and a first flange seat surrounding the periphery of the input shaft sleeve are arranged at the input end of the speed reducer; the braking device comprises a shell assembly, the shell assembly is provided with a second flange seat matched with the first flange seat, a main shaft with one end inserted into the input shaft sleeve is arranged on the shell assembly in a penetrating mode, and the other end of the main shaft is used for being connected with a motor; the brake module comprises a fixed disc fixedly arranged in the shell assembly and a brake disc movably arranged on the main shaft in a penetrating mode so as to make contact with or leave the fixed disc, and the brake disc can only axially move relative to the main shaft; the electromagnetic driving module is arranged between the brake disc and the shell assembly and can drive the brake disc to make contact with or be separated from the fixed disc. The speed reducer and the braking device are connected through the first flange seat and the second flange seat to form a whole, the braking module and the electromagnetic driving module are arranged outside the motor so that the braking torque can be improved, and the efficiency and the safety of the system can be improved through the design.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission and braking, in particular to a braking and decelerating composite transmission device. Background Art

[0002] The braking function and the decelerating function are important components of a mechanical transmission system. A speed reducer and a brake are two different mechanical devices, and they play important roles in various mechanical systems. The speed reducer is used to reduce the output speed of a motor or other high-speed power source to match the working speed requirements of the mechanical system. The brake is used to stop the mechanical system or keep it in a specific position to provide safety protection.

[0003] The speed reducer is usually arranged between the prime mover and the working machine or the actuator. The gear with fewer teeth on the driving shaft of the speed reducer meshes with the large gear on the driven shaft to achieve the purpose of deceleration. Usually, one pair or more gears with the same principle mesh to achieve an ideal deceleration effect, so as to reduce the speed of the motor, and at the same time increase the output torque, playing the role of matching the speed and transmitting the torque. Its main principle is a power transmission mechanism that uses the speed conversion function of gears to reduce the high-speed rotation of the motor to the required rotation speed and obtain a larger torque mechanism.

[0004] During the use of the mechanical transmission system, it is usually necessary to control the operation and stop of the moving parts in the machine. Generally, a motor directly installed with a braking device is used as the power source. This braking device is limited by the radial size of the motor, the braking torque is small, and the margin of the braking torque is limited. Long-term use will cause the performance of the brake to decline and the safety performance of the mechanical transmission system to decrease due to wear. Therefore, in order to ensure the long-term safe and stable operation of the speed reducer, for a mechanical transmission system with high safety requirements, it is necessary to consider the reliability of the braking function and configure an efficient, safe and reliable brake in the system.

[0005] The common connection methods between the brake and the speed reducer mainly include using a coupling or an elastic coupling to connect the brake to the input shaft of the speed reducer. During the connection process, it is necessary to ensure the shaft alignment, that is, the concentricity of the two shafts meets the requirements, so as to reduce the vibration and noise during operation. After the connection is completed, the equipment is debugged and tested to verify the normal operation and performance of the system, and it is very inconvenient to use. Content of the Utility Model

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides a braking and decelerating composite transmission device that can improve the braking torque on the premise of integrating the braking and decelerating functions.

[0007] A braking and decelerating composite transmission device according to an embodiment of the present utility model includes: a speed reducer, an input shaft sleeve is provided at an input end of the speed reducer, and a first flange seat is disposed around an outer periphery of the input shaft sleeve, and a first keyway is provided on an inner peripheral wall of the input shaft sleeve; a braking device, the braking device includes a housing assembly, the housing assembly is provided with a second flange seat matching the first flange seat, a main shaft penetrating through the housing assembly and inserted into the input shaft sleeve at one end is provided, a first transmission key drivingly connected to the first keyway is provided on the main shaft, and the other end of the main shaft is used for connecting to a motor; a braking module, the braking module includes a fixed disk fixedly disposed in the housing assembly and a braking disk movably penetrating through the main shaft to contact or separate from the fixed disk, and the braking disk can only axially move relative to the main shaft; an electromagnetic driving module, disposed between the braking disk and the housing assembly, capable of driving the braking disk to contact or separate from the fixed disk.

[0008] A braking and decelerating composite transmission device according to an embodiment of the present utility model has at least the following beneficial effects:

[0009] The speed reducer and the braking device of the above braking and decelerating composite transmission device are connected through the first flange seat and the second flange seat to form an integral body, and the main shaft of the braking device is respectively connected to the input shaft sleeve of the speed reducer and the motor, so that the braking module and the electromagnetic driving module of the braking device are disposed outside the motor. On the premise of integrating the braking and decelerating functions, it is beneficial to increase the braking torque, and this design can also improve the efficiency and safety of the system.

[0010] In some embodiments of the present utility model, the main shaft is connected to a spline shaft component through a second transmission key, and a spline groove matching the spline shaft component is provided through a middle part of the braking disk, so that the braking disk can only reciprocate axially relative to the main shaft.

[0011] In some embodiments of the present utility model, the housing assembly includes a cover body installed on a surface of the second flange seat facing away from the first flange seat, a receiving space for accommodating the braking module and the electromagnetic driving module is defined between the cover body and the second flange seat, and waterproof sealing rings are provided between the cover body and the second flange seat, between the first flange seat and the second flange seat, and between the main shaft and the cover body.

[0012] In some embodiments of the present utility model, a first relief hole for the main shaft to pass through is provided in a middle part of the second flange seat, a rotating bearing is provided between the first relief hole and the main shaft, a first through hole for the end of the main shaft away from the speed reducer to pass through is provided in a middle part of the cover body, and a waterproof sealing ring is disposed between the first through hole and the main shaft.

[0013] In some embodiments of the present utility model, the electromagnetic drive module includes a magnetic member and an electromagnetic coil. The magnetic member is disposed opposite to the surface of the brake disc facing away from the fixed disc. An elastic member is connected between the magnetic member and the second flange seat. The elastic member drives the magnetic member to push the brake disc against the fixed disc. The electromagnetic coil can attract the magnetic member to move in a direction of compressing the elastic member, so that the brake disc can be separated from the fixed disc.

[0014] In some embodiments of the present utility model, a yoke member corresponding to the electromagnetic coil is fixedly disposed on the inner wall of the second flange seat.

[0015] In some embodiments of the present utility model, the yoke member has an annular sunk groove with an open end facing the magnetic member. The electromagnetic coil is disposed within the annular sunk groove and matches the shape of the annular sunk groove. The magnetic member is in the shape of a circular ring plate capable of closing the open end of the annular sunk groove, and the projection of the magnetic member in the axial direction of the main shaft can cover the brake disc.

[0016] In some embodiments of the present utility model, a second relief hole for the main shaft to pass through is provided in the middle of the yoke member. The yoke member has an annular flange located between the inner peripheral wall of the second relief hole and the inner peripheral wall of the annular sunk groove. A plurality of sunk holes with open ends facing the magnetic member are circumferentially distributed at equal intervals around the axial direction of the main shaft on the annular flange. The elastic member includes compression springs respectively disposed in each of the sunk holes, and one end of the compression spring away from the sunk hole abuts against the magnetic member.

[0017] In some embodiments of the present utility model, friction pads are attached to both side walls of the brake disc. The two friction pads can respectively contact the fixed disc and the magnetic member. When the electromagnetic coil is energized, the gap between the fixed disc and the magnetic member is greater than the total thickness of the brake disc and the friction pads.

[0018] In some embodiments of the present utility model, a guiding cylinder is disposed around the axial direction of the main shaft on the second flange seat. The second relief hole is sleeved outside the guiding cylinder. A sliding guiding cylinder is slidably installed in the middle of the brake disc in the second relief hole. The fixed disc is fixed to the second flange seat by a bolt assembly.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0021] Figure 1 Schematic structural diagram of an embodiment of the braking and decelerating composite transmission device of the present utility model;

[0022] Figure 2 is Figure 1 Partial cross-sectional schematic diagram of the embodiment;

[0023] Figure 3 is Figure 1 Exploded schematic diagram of the structure of the braking device of the embodiment.

[0024] Reference numerals:

[0025] Reducer 100; input shaft sleeve 110; first flange seat 120; first keyway 130; braking device 200; housing assembly 210; second flange seat 211; cover body 212; first relief hole 213; first through hole 214; guiding cylinder 215; main shaft 220; first transmission key 221; second transmission key 222; spline shaft component 223; braking module 230; fixed disk 231; brake disk 232; sliding guiding cylinder 233; spline groove 234; electromagnetic drive module 240; magnetic part 241; electromagnetic coil 242; elastic part 243; waterproof sealing ring 250; rotating bearing 260; yoke part 270; annular sinking groove 271; second relief hole 272; counterbore 273; friction plate 280. Detailed implementation manners

[0026] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0027] In the description of the present utility model, it should be understood that with respect to the orientation description, for example, terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 of the present utility model.

[0028] In the description of the present utility model, the meaning of "a number of" is one or more, the meaning of "a plurality of" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the recited number, while understandings such as "above", "below", "within", etc. include the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features or implicitly specifying the sequence relationship of the indicated technical features.

[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] See Figures 1 to 3 , a braking and decelerating composite transmission device of the present utility model includes: a speed reducer 100, an input shaft sleeve 110 is provided at the input end of the speed reducer 100, and a first flange seat 120 is disposed around the outer periphery of the input shaft sleeve 110, and a first keyway 130 is provided on the inner peripheral wall of the input shaft sleeve 110; a braking device 200, the braking device 200 includes a housing assembly 210, the housing assembly 210 is provided with a second flange seat 211 that matches the first flange seat 120, a main shaft 220 with one end inserted into the input shaft sleeve 110 penetrates through the housing assembly 210, a first transmission key 221 that is in transmission connection with the first keyway 130 is provided on the main shaft 220, and the other end of the main shaft 220 is used for connecting to a motor; a braking module 230, the braking module 230 includes a fixed disk 231 fixedly disposed in the housing assembly 210 and a braking disk 232 movably penetrating through the main shaft 220 to contact or separate from the fixed disk 231, and the braking disk 232 can only axially move relative to the main shaft 220; an electromagnetic drive module 240 is disposed between the braking disk 232 and the housing assembly 210 and can drive the braking disk 232 to contact or separate from the fixed disk 231.

[0031] The speed reducer 100 and the braking device 200 of the above braking and decelerating compound transmission device are connected by the first flange seat 120 and the second flange seat 211 to form an integral body. The main shaft 220 of the braking device 200 is respectively connected to the input shaft sleeve 110 of the speed reducer 100 and the motor, so that the braking module 230 and the electromagnetic drive module 240 of the braking device 200 are arranged outside the motor. On the premise of integrating the braking and decelerating functions, it is beneficial to increase the braking torque, and the braking torque is not limited by the size of the motor. This design can also improve the efficiency and safety of the system.

[0032] See Figure 2 and Figure 3 In some embodiments of the present invention, the main shaft 220 is connected with a spline shaft component 223 through a second transmission key 222. A spline groove 234 matching the spline shaft component 223 is provided through the middle of the brake disc 232, so that the brake disc 232 can only move axially back and forth relative to the main shaft 220. It can be understood that the spline groove 234 of the brake disc 232 is slidably nested on the spline shaft component 223 of the main shaft 220, so that the brake disc 232 can move axially along the main shaft 220, and when the motor drives the main shaft 220 to rotate, the brake disc 232 can follow the main shaft 220 to rotate, so as to achieve a large torque transmission and prevent relative rotation between the brake disc 232 and the main shaft 220.

[0033] See Figure 2 and Figure 3 In some embodiments of the present invention, the housing assembly 210 includes a cover 212 installed on the surface of the second flange seat 211 facing away from the first flange seat 120. A receiving space for accommodating the braking module 230 and the electromagnetic drive module 240 is defined between the cover 212 and the second flange seat 211. The structure of the housing assembly 210 is simple and compact. Waterproof sealing rings 250 are provided between the cover 212 and the second flange seat 211, between the first flange seat 120 and the second flange seat 211, and between the main shaft 220 and the cover 212. In order to adapt to outdoor open-air working conditions, the entire braking and decelerating compound transmission device forms a waterproof structure, so that it can directly withstand frost, rain, wind and sun, and can be applied to occasions where precise control and safe braking are required.

[0034] See Figure 2 and Figure 3, in some embodiments of the present utility model, in order to ensure that the main shaft 220 can rotate smoothly and stably relative to the housing assembly 210 and improve the reliability of transmission, a first relief hole 213 for the main shaft 220 to pass through is provided in the middle of the second flange seat 211. A rotating bearing 260 is provided between the first relief hole 213 and the main shaft 220. A first through hole 214 for the end of the main shaft 220 away from the speed reducer 100 to pass through is provided in the middle of the cover body 212. A waterproof sealing ring 250 is arranged between the first through hole 214 and the main shaft 220.

[0035] See Figure 2 , in some embodiments of the present utility model, the electromagnetic drive module 240 includes a magnetic member 241 and an electromagnetic coil 242. The magnetic member 241 is disposed opposite to the surface of the brake disc 232 facing away from the fixed disc 231. An elastic member 243 is connected between the magnetic member 241 and the second flange seat 211. The elastic member 243 drives the magnetic member 241 to push the brake disc 232 against the fixed disc 231. The electromagnetic coil 242 can attract the magnetic member 241 to move in the direction of compressing the elastic member 243, so that the brake disc 232 can be separated from the fixed disc 231. It can be understood that when the electromagnetic coil 242 is energized, the electromagnetic coil 242 can attract the magnetic member 241 to compress the elastic member 243. At this time, the brake disc 232 and the fixed disc 231 are separated, and the main shaft 220 can rotate freely; when the electromagnetic coil 242 is de-energized, the electromagnetic coil 242 no longer attracts the magnetic member 241, and the elastic member 243 restores its elastic deformation to drive the brake disc 232 to extend toward the fixed disc 231, thereby realizing the braking function. The structure of this electromagnetic drive module 240 is simple, the braking effect is good, and the working reliability is high.

[0036] See Figure 2 , in some embodiments of the present utility model, a yoke member 270 corresponding to the electromagnetic coil 242 is fixedly arranged on the inner wall of the second flange seat 211. It should be noted that the yoke member 270 plays a role in transmitting magnetic force lines in the magnetic circuit, and can restrain the magnetic force lines generated by the electromagnetic coil 242 from spreading outward, so that the magnetic force line bundle is concentrated around the electromagnetic coil 242, which is beneficial to improving the adsorption force on the magnetic member 241. Yokes are generally made of soft iron, A3 steel and soft magnetic alloys with relatively high magnetic permeability.

[0037] See Figure 2 and Figure 3, in some embodiments of the present utility model, the yoke member 270 has an annular sunk groove 271 with an open end facing the magnetic member 241. The electromagnetic coil 242 is disposed within the annular sunk groove 271 and matches the shape of the annular sunk groove 271. The magnetic member 241 is in the shape of a circular ring plate capable of closing the open end of the annular sunk groove 271, and the projection of the magnetic member 241 in the axial direction of the main shaft 220 can cover the brake disc 232. Using the annular sunk groove 271 to install the electromagnetic coil 242 eliminates the use of fixing parts and is also beneficial to improving the structural compactness of the braking device 200 along the axial direction of the main shaft 220. In addition, all positions of the circular ring plate-shaped magnetic member 241 can be attracted by the electromagnetic coil 242. Under the sole action of the elastic member 243, the magnetic member 241 can also fully contact the surface of the brake disc 232, which is beneficial to improving the stability during frictional braking.

[0038] See Figure 2 and Figure 3 , in some embodiments of the present utility model, for the convenience of assembling the elastic member 243 and to enable the elastic member 243 to fully act on the circular ring plate-shaped magnetic member 241, a second relief hole 272 for the main shaft 220 to pass through is provided in the middle of the yoke member 270. The yoke member 270 has an annular flange located between the inner peripheral wall of the second relief hole 272 and the inner peripheral wall of the annular sunk groove 271. The annular flange is circumferentially provided with a plurality of counterbores 273 with openings facing the magnetic member 241 at equal intervals around the axial direction of the main shaft 220. The elastic member 243 includes compression springs respectively disposed in each of the counterbores 273, and the end of the compression spring away from the counterbore 273 abuts against the magnetic member 241.

[0039] See Figure 2 and Figure 3, in some embodiments of the present utility model, friction plates 280 are attached to both side walls of the brake disc 232. The two friction plates 280 can respectively contact the fixed disc 231 and the magnetic member 241. When the electromagnetic coil 242 is energized, the gap between the fixed disc 231 and the magnetic member 241 is greater than the total thickness of the brake disc 232 and the friction plates 280. It should be noted that the magnetic member 241 can only reciprocate along the axial direction of the main shaft 220 relative to the housing assembly 210 and cannot rotate relative to the housing assembly 210. When the magnetic member 241 is not attracted by the electromagnetic coil 242, the magnetic member 241 contacts the friction plate 280 on one side of the brake disc 232 under the action of the elastic member 243, which has a certain decelerating effect on the whole composed of the brake disc 232 and the main shaft 220. When the friction plate 280 on the other side of the brake disc 232 contacts the fixed disc 231, the fixed disc 231 and the magnetic member 241 jointly clamp the brake disc 232. The provision of friction plates 280 on both side walls of the brake disc 232 is beneficial to force balance.

[0040] See Figure 2 and Figure 3 , in some embodiments of the present utility model, a guiding cylinder 215 is provided around the axial direction of the main shaft 220 on the second flange seat 211. The second relief hole 272 is sleeved outside the guiding cylinder 215. A sliding guiding cylinder 233 which is slidably fitted in the second relief hole 272 is provided in the middle of the brake disc 232. The fixed disc 231 is fixed to the second flange seat 211 through a bolt assembly. When assembling the braking device 200 using the above structure, the relative positions of the second flange seat 211, the yoke member 270, the magnetic member 241 and the brake disc 232 in the radial direction of the main shaft 220 can be accurately positioned, so as to ensure concentric arrangement among these components.

[0041] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0042] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A braking and decelerating composite transmission device, characterized in that, Including: A speed reducer (100), an input shaft sleeve (110) is provided at an input end of the speed reducer (100), and a first flange seat (120) is disposed around an outer periphery of the input shaft sleeve (110), and a first keyway (130) is provided on an inner peripheral wall of the input shaft sleeve (110); A braking device (200), the braking device (200) includes a housing assembly (210), the housing assembly (210) is provided with a second flange seat (211) matching with the first flange seat (120), a main shaft (220) with one end inserted into the input shaft sleeve (110) penetrates through the housing assembly (210), a first transmission key (221) drivingly connected with the first keyway (130) is provided on the main shaft (220), and the other end of the main shaft (220) is used for connecting to a motor; A braking module (230), the braking module (230) includes a fixed disk (231) fixedly arranged in the housing assembly (210) and a braking disk (232) movably penetrating through the main shaft (220) to contact or separate from the fixed disk (231), and the braking disk (232) can only axially move relative to the main shaft (220); An electromagnetic driving module (240), which is disposed between the braking disk (232) and the housing assembly (210) and can drive the braking disk (232) to contact or separate from the fixed disk (231).

2. A braking and decelerating composite transmission device according to claim 1, wherein: The main shaft (220) is connected with a spline shaft component (223) through a second transmission key (222), and a spline groove (234) matching with the spline shaft component (223) is provided through a middle part of the braking disk (232), so that the braking disk (232) can only axially reciprocate relative to the main shaft (220).

3. A braking and decelerating composite transmission device according to claim 1, wherein: The housing assembly (210) includes a cover body (212) installed on a surface of the second flange seat (211) facing away from the first flange seat (120), a receiving space for accommodating the braking module (230) and the electromagnetic driving module (240) is defined between the cover body (212) and the second flange seat (211), and waterproof sealing rings (250) are provided between the cover body (212) and the second flange seat (211), between the first flange seat (120) and the second flange seat (211), and between the main shaft (220) and the cover body (212).

4. A braking and decelerating composite transmission device according to claim 3, wherein: A first relief hole (213) through which the main shaft (220) passes is formed in the middle of the second flange seat (211). A rotating bearing (260) is provided between the first relief hole (213) and the main shaft (220). A first through hole (214) through which one end of the main shaft (220) far from the speed reducer (100) passes is formed in the middle of the cover body (212). A waterproof sealing ring (250) is arranged between the first through hole (214) and the main shaft (220).

5. The braking and decelerating composite transmission device according to claim 3, wherein: The electromagnetic drive module (240) includes a magnetic member (241) and an electromagnetic coil (242). The magnetic member (241) is disposed opposite to the surface of the brake disc (232) facing away from the fixed disc (231). An elastic member (243) is connected between the magnetic member (241) and the second flange seat (211). The elastic member (243) drives the magnetic member (241) to push the brake disc (232) against the fixed disc (231). The electromagnetic coil (242) can attract the magnetic member (241) to move in the direction of compressing the elastic member (243) so that the brake disc (232) can be separated from the fixed disc (231).

6. The braking and decelerating composite transmission device according to claim 5, wherein: A yoke member (270) corresponding to the electromagnetic coil (242) is fixedly arranged on the inner wall of the second flange seat (211).

7. The braking and decelerating composite transmission device according to claim 6, wherein: The yoke member (270) has an annular sink (271) with an open end facing the magnetic member (241). The electromagnetic coil (242) is arranged in the annular sink (271) and matches the shape of the annular sink (271). The magnetic member (241) is in the shape of a circular ring plate that can close the open end of the annular sink (271), and the projection of the magnetic member (241) in the axial direction of the main shaft (220) can cover the brake disc (232).

8. The braking and decelerating composite transmission device according to claim 7, wherein: A second relief hole (272) through which the main shaft (220) passes is formed in the middle of the yoke member (270). The yoke member (270) has an annular flange located between the inner peripheral wall of the second relief hole (272) and the inner peripheral wall of the annular sink (271). A plurality of sink holes (273) with open ends facing the magnetic member (241) are circumferentially distributed at equal intervals around the axial direction of the main shaft (220) on the annular flange. The elastic member (243) includes compression springs respectively arranged in the sink holes (273), and one end of the compression spring far from the sink hole (273) abuts against the magnetic member (241).

9. The braking and decelerating composite transmission device according to claim 6, wherein: Friction plates (280) are attached to both side walls of the brake disc (232). The two friction plates (280) can respectively contact the fixed disc (231) and the magnetic member (241). When the electromagnetic coil (242) is energized, the gap between the fixed disc (231) and the magnetic member (241) is greater than the total thickness of the brake disc (232) and the friction plates (280).

10. A braking and decelerating compound transmission device according to claim 8, wherein: The second flange seat (211) is provided with a guiding cylinder (215) around the axial direction of the main shaft (220). The second relief hole (272) is sleeved outside the guiding cylinder (215). A sliding guiding cylinder (233) that is slidably fitted in the second relief hole (272) is provided in the middle of the brake disc (232). The fixed disc (231) is fixed to the second flange seat (211) through a bolt assembly.

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