geared traction machine

Abstract

The application relates to the elevator technical field, in particular to a geared traction machine. A geared traction machine comprises a supporting mechanism, a power mechanism and a traction mechanism, the supporting mechanism comprises a machine shell and a machine cover, the traction mechanism comprises a traction wheel, and the power mechanism can drive the traction wheel to rotate; the power mechanism comprises a motor and a gear transmission module, the gear transmission module comprises an input gear, a speed reduction gear set, an output gear and an output shaft, the output gear is connected to one end of the output shaft, the output end of the motor shaft of the motor is connected with the input gear, the input gear is in transmission connection with the input end of the speed reduction gear set, the output end of the speed reduction gear set is in transmission connection with the output gear, and the other end of the output shaft is connected with the traction wheel. The application has the advantages that the transmission links between the power mechanism and the traction mechanism are few, the transmission efficiency is high, the vibration and noise generated during work are reduced, the overall structure is more compact, the weight is lightened, the application scene of the geared traction machine is expanded, energy is saved, and the cost is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the elevator technical field, and particularly to a geared traction machine. BACKGROUND

[0002] The traction machine is the power equipment of the elevator, responsible for conveying and transmitting power to make the elevator run. The traction machine includes a gearless traction machine and a geared traction machine.

[0003] The gearless traction machine directly outputs power without a reducer and other mechanisms, so it is small in size and low in power consumption, and is widely used in the elevator field. However, the gearless traction machine needs to use a large amount of neodymium iron boron and other rare earths, and the rare earth resources are limited, the cost is high, and the market fluctuates greatly, so the gearless traction machine is obviously limited in the application and promotion in the market of more efficient geared traction machines. The rare earth permanent magnet synchronous traction machine widely used in the market meets the third energy efficiency level, and the high-efficiency motor with the second and first energy efficiency levels and above has few market applications due to a large increase in cost.

[0004] The geared traction machine is the application of an industrial reducer motor in the elevator. The motor and the reducer box are connected and driven through a shaft coupling. The power is transmitted to the traction sheave through the intermediate reducer box. Therefore, compared with the gearless traction machine, the motor part of the geared traction machine can be designed at a high speed under the condition of the same output torque and power, so the stator, rotor and other structural components of the motor can be smaller in size, the raw materials such as neodymium iron boron used can be significantly reduced, the cost is reduced, and the conditions for expanding to a higher energy efficiency level traction machine are met. However, the geared traction machine has many transmission links, low transmission efficiency, large size, high energy consumption, and high noise, which still limits its application. At present, only the geared traction machine with worm gear transmission has some application in the field of large-load elevators due to large load and low noise, but the overall efficiency is very low. SUMMARY

[0005] Therefore, the present application provides a geared traction machine aiming at the above technical problems.

[0006] A geared traction machine includes a power mechanism and a traction mechanism. The traction mechanism includes a traction sheave. The power mechanism can drive the traction sheave to rotate.

[0007] The power mechanism includes a motor and a gear transmission module. The gear transmission module includes an input gear, a reduction gear set, an output gear and an output shaft. The output gear is connected to one end of the output shaft. The output end of the motor shaft is connected to the input gear. The input gear is in transmission connection with the input end of the reduction gear set. The output end of the reduction gear set is in transmission connection with the output gear. The other end of the output shaft is connected to the traction sheave.

[0008] The gear traction machine further comprises a supporting mechanism, the supporting mechanism comprises a machine shell and a machine cover, the machine cover is arranged on one side of the machine shell, the motor is arranged in the machine cover, the gear transmission module is arranged in the machine shell, the motor shaft extends from the machine cover into the machine shell, and the machine shell extends into the traction wheel near one end of the output shaft to support the traction wheel.

[0009] In this way, the motor shaft is directly connected with the gear transmission module through transmission, the output shaft of the gear transmission module is connected with the traction wheel, the motor, the speed reduction mechanism and the traction wheel are combined into one, the transmission links between the power mechanism and the traction mechanism are reduced, the transmission efficiency is high, the intermediate transmission links such as the shaft coupling are cancelled, the traction wheel is supported on the machine shell, the machine shell shares the stress load transmitted by the traction wheel, the volume of the traction machine is further reduced, the vibration and noise generated by the traction machine during operation are reduced, the overall structure is more compact and lightweight, the application scenarios of the gear traction machine are greatly expanded, the gear traction machine can replace the gearless traction machine more, energy is saved, and the cost is low. In addition, the gear transmission module in the present application can adjust the transmission ratio only by using the speed reduction gear set, so when the design needs to be adjusted, only the speed reduction gear set needs to be adjusted, the whole traction machine does not need to be changed, the overall structure has high universality, is convenient to disassemble and assemble, and has high processing efficiency. In addition, the supporting mechanism is arranged as a split machine shell and a machine cover, the machine cover contains the motor, and the machine shell contains the gear transmission module, so that the motor can be disassembled alone, the motor and the gear transmission module are spatially isolated, and mutual interference is prevented. The structure and size of the machine shell and the machine cover can be adaptively changed according to the elements contained therein, so that the overall structure is more compact.

[0010] In one of the embodiments, the motor comprises a stator and a rotor, the stator is arranged on the machine cover along the inner wall of the machine cover in a circumferential direction, and the rotor is arranged around the motor shaft.

[0011] In this way, the motor structure with the inner rotor is adopted, so that the overall volume is smaller.

[0012] In one of the embodiments, the speed reduction gear set comprises a primary gear, a transmission shaft and a secondary gear.

[0013] The primary gear is in external meshing transmission connection with the input gear;

[0014] One end of the transmission shaft is arranged in the primary gear and connected with the primary gear, and the other end of the transmission shaft is arranged in the secondary gear and connected with the secondary gear;

[0015] The secondary gear is in external meshing transmission connection with the output gear;

[0016] The motor shaft and the output shaft are located on the same side of the transmission shaft.

[0017] In this way, the input gear and the primary gear constitute a primary transmission, and the secondary gear and the output gear constitute a secondary transmission, so as to improve the transmission efficiency, simplify the structure of the transmission, further simplify the structure of the power mechanism, effectively improve the transmission efficiency, and realize the improvement of high speed and miniaturization of the power mechanism.

[0018] In one of the embodiments, the casing is cylindrical and sequentially provided with an output portion and a gear portion in the axial direction, the cover is connected with the gear portion, the outer diameters of the output portion and the cover are both smaller than that of the gear portion, the output portion extends into the gear portion to form a first supporting portion, and the cover extends into the gear portion to form a second supporting portion.

[0019] The output shaft extends from the output portion and is connected with the traction wheel, the traction wheel is supported on the outer wall of the output portion, and the output shaft is supported on the inner wall of the output portion.

[0020] The input gear, the gear set and the output gear are arranged in the gear portion, the gear set is supported on the first supporting portion and / or the second supporting portion, and the motor shaft is supported on the second supporting portion. In this way, the output portion can support the traction wheel to share the stress load transmitted by the traction wheel, and the first supporting portion and the second supporting portion can support the motor shaft, the gear set and the output shaft in the casing, so as to make the structure more compact and stable.

[0021] In one of the embodiments, the traction mechanism further comprises a driving disc, one end of the driving disc is connected with one end of the output shaft extending from the output portion, and the other end of the driving disc is connected with the radial side of the traction wheel.

[0022] In this way, the driving disc can be used to transmit power from the output shaft to the traction wheel.

[0023] In one of the embodiments, the driving disc is provided with a shaft hole, the output shaft extends into the shaft hole and is connected with the driving disc, and the driving disc and the output shaft are connected through a spline structure. The spline structure comprises intermeshing internal splines and external splines, the internal splines are arranged on the inner wall of the shaft hole, the external splines are arranged on the outer wall of the output shaft, and a gap is arranged between the external splines and the internal splines.

[0024] In this way, the driving disc and the output shaft are connected through the spline, the force is more uniform, and the driving disc and the output shaft can bear greater stress load, avoid deformation and improve the centering, thereby prolonging the service life of the traction machine. The gap provides a space for extrusion of the outer spline and the inner spline, so that the two are flexibly matched, thereby significantly reducing the direct disturbance of the load deformation of the traction mechanism on the output shaft, preventing structural deformation and facilitating adjustment during assembly. Moreover, the traction wheel is connected to the output shaft through the driving disc and is also arranged on the machine shell, so that the driving disc and the machine shell can share the load on the traction wheel. The overall structure is stable, thereby reducing vibration and noise.

[0025] In one of the embodiments, the supporting mechanism further comprises a front support connected to the machine shell, and one end of the driving disc connected to the output shaft is supported on the front support.

[0026] In this way, the load and impact load received by the traction wheel for a long time can be shared by the driving disc and the machine shell, the driving disc can transmit stress to the front support, so that the machine shell and the front support share the stress with the output shaft, avoiding the output shaft directly bearing the load, reducing the deformation of the output shaft, reducing the disturbance and noise during the operation of the output shaft, making the gear transmission module operate quietly and reliably, and meeting the requirements of low vibration and low noise during operation.

[0027] In one of the embodiments, the number of the reduction gear sets is one, and the motor shaft, the output shaft and the transmission shaft are arranged in parallel; or, the motor shaft and the output shaft are coaxially arranged, and the number of the reduction gear sets is multiple, and the multiple reduction gear sets are equally distributed around the motor shaft.

[0028] In this way, the reduction gear sets can be concentrated in the radial direction of the input gear and the output gear, thereby fully utilizing the radial space and shortening the axial distance, further reducing the overall volume of the traction machine, and also facilitating disassembly of the reduction gear sets. When one reduction gear set is used, the structure is simple, and a wide range of transmission ratios can be selected for design, which is beneficial to the optimization design of high-speed and small-size motor; when multiple reduction gear sets are used, the transmission power can be shared, the stress of the input gear and the output gear is balanced, which is obviously beneficial to reduce the loss and improve the transmission efficiency, and the structure of the gear transmission module is more compact and has a longer service life, thereby better meeting the use requirements of greater power.

[0029] In one of the embodiments, the number of the reduction gear sets is multiple, and the gear transmission module further comprises an adjusting assembly, the adjusting assembly comprises an inner sleeve, an outer sleeve and a fastener, the outer sleeve is sleeved outside the inner sleeve, the fastener connects the inner sleeve and the outer sleeve in the axial direction and is used for adjusting the distance between the inner sleeve and the outer sleeve in the axial direction to adjust the expansion degree of the adjusting assembly in the radial direction; wherein the adjusting assembly is arranged between at least one of the primary gears and the transmission shaft and / or between at least one of the secondary gears and the transmission shaft.

[0030] In this way, the phase angle difference between the primary gear and the secondary gear in each of the multiple sets of reduction gear sets can be adjusted by the adjusting assembly, and the phase angle difference is the same, so that the stable meshing transmission between the multiple sets of reduction gear sets and the input gear and the output gear is ensured, and the idle rotation of the gears is prevented, and the assembly difficulty is obviously reduced.

[0031] In one of the embodiments, the traction mechanism further comprises a brake wheel, the brake wheel is connected to the traction wheel on the side close to the gear part, and the brake of the brake wheel is arranged on the outer wall of the gear part.

[0032] In this way, the transmission gear module can be arranged in the radial space of the traction wheel, and the external space of the gear part is fully utilized, so that the overall structure is more compact and the volume is reduced.

[0033] In one of the embodiments, the brake wheel comprises a driving part and a braking part, the traction wheel is arranged on the outer periphery of the driving part, the driving part is supported on the outer wall of the output part, and the braking part is connected with the driving part and used for cooperating with the brake.

[0034] In this way, the connection between the traction wheel and the brake wheel is facilitated.

[0035] In one of the embodiments, the side of the gear part close to the output part avoids the traction wheel, so that the braking part partially covers the gear part, and the brake of the braking part is arranged on the outer wall of the gear part.

[0036] In this way, the occupied space of the braking part and the gear part in the axial direction of the output shaft is overlapped, so that the occupied space is saved.

[0037] In one of the embodiments, the side of the cover away from the shell is provided with a third accommodating cavity, and an encoder connected with the motor shaft is arranged in the third accommodating cavity.

[0038] In this way, the encoder is convenient to install and disassemble, and the space is saved.

[0039] In one of the embodiments, the cover comprises a cover body and an end cover plate connected to each other, and the third accommodating cavity is arranged on the end cover plate.

[0040] In this way, the encoder is further convenient to assemble and disassemble.

[0041] In one of the embodiments, the cover is provided with a third supporting part near one side of the shell, the third accommodating cavity is at least partially arranged in the cover, and a fourth supporting part is arranged on a side wall of the cover where the third accommodating cavity is located, and the motor shaft is supported by the third supporting part and the fourth supporting part.

[0042] In this way, the third supporting part and the fourth supporting part can support the motor shaft and ensure the stability of rotation of the motor shaft, and the supporting parts make full use of the internal space of the supporting mechanism.

[0043] Compared with the prior art, the present application changes the structural layout of the geared traction machine, so that the transmission link between the power mechanism and the traction mechanism is less, the transmission efficiency is high, the vibration and noise generated during the operation of the geared traction machine are reduced, the generality is strong for different transmission ratios, the overall structure is more compact, the weight is light, the application scenarios of the geared traction machine are greatly expanded, the geared traction machine can replace the gearless traction machine more, thereby saving energy, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 A sectional view of the geared traction machine provided by the present application is provided;

[0045] Figure 2 Another angle sectional view of the geared traction machine provided by the present application is provided;

[0046] Figure 3 A front view of the geared traction machine provided by the present application is provided;

[0047] Figure 4 A side view of the geared traction machine provided by the present application is provided;

[0048] Figure 5 A sectional view of the adjusting assembly provided by one embodiment of the present application is provided;

[0049] Figure 6 A sectional view of the spline structure of the traction machine provided by the present application is provided;

[0050] Figure 7 An enlarged schematic view of the spline structure of the traction machine provided by the present application is provided.

[0051] The meanings of the symbols in the figures are as follows:

[0052] 100, gear traction machine; 10, support mechanism; 11, front support; 1211, first accommodating cavity; 1212, second accommodating cavity; 1213, avoiding space; 122, accommodating groove; 123, output part; 1231, first support part; 124, gear part; 13, machine cover; 131, third accommodating cavity; 1321, second support part; 134, cover body; 1341, third support part; 135, end cover plate; 1351, fourth support part; 14, machine shell; 20, power mechanism; 21, motor; 211, stator; 212, rotor; 22, motor shaft; 23, gear transmission module; 231, input gear; 232, speed reduction gear set; 2321, primary gear; 2322, transmission shaft; 2323, secondary gear; 233, output gear; 24, output shaft; 25, spline structure; 251, inner spline; 252, outer spline; 253, gap; 30, traction mechanism; 31, driving disc; 314, shaft hole; 32, brake wheel; 321, brake part; 322, driving part; 33, traction wheel; 40, brake; 435, adjusting assembly; 4351, inner sleeve; 4351a, expansion part; 4351b, limiting part; 4351c, step; 4351d, first conical surface; 4352, outer sleeve; 4352a, second conical surface; 4353, fastener; 4354, avoiding cavity. DETAILED DESCRIPTION

[0053] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0054] It should be noted that when a mechanism is referred to as "fixed to" or "disposed on" another mechanism, it can be directly on the other mechanism or there can be a mediating mechanism. When a mechanism is referred to as "connected to" another mechanism, it can be directly connected to the other mechanism or there can be a mediating mechanism. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the specification of the present application are for illustrative purposes only and do not indicate the only implementation.

[0055] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly and specifically limited.

[0056] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above" and "over" of the first feature to the second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "on", "above" and "over" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The "under", "below" and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0057] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by a person skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0058] Please refer to Figures 1-4 The present application provides a geared traction machine 100 applied to the field of elevators, which is used for conveying and transmitting power to make the elevator move.

[0059] In one embodiment, a geared traction machine 100 includes a power mechanism 20, a support mechanism 10 and a traction mechanism 30, the power mechanism 20 is connected to the support mechanism 10, and the power mechanism 20 can drive the traction mechanism 30 to rotate.

[0060] The power mechanism 20 includes a motor 21 and a gear transmission module 23, the gear transmission module 23 includes an input gear 231, a speed reduction gear set 232, an output gear 233 and an output shaft 24, the output gear 233 is connected to one end of the output shaft 24, the output end of the motor shaft 22 of the motor 21 is connected with the input gear 231, the input gear 231 is in transmission connection with the input end of the speed reduction gear set 232, the output end of the speed reduction gear set 232 is in transmission connection with the output gear 233, and the other end of the output shaft 24 is connected with the traction wheel 33;

[0061] The support mechanism 10 comprises a casing 14 and a cover 13, the cover 13 is arranged on one side of the casing 14, the motor 21 is arranged in the cover 13, the gear transmission module 23 is arranged in the casing 14, the motor shaft 22 extends from the cover 13 into the casing 14, and the casing 14 extends into the traction sheave 33 near one end of the output shaft 24 to support the traction sheave 33.

[0062] In this way, the motor shaft 22 is directly connected with the gear transmission module 23 through transmission, and the output shaft 24 of the gear transmission module 23 is connected with the traction sheave 33, so that the motor 21, the speed reduction mechanism and the traction sheave 33 are combined into one, the transmission links between the power mechanism 20 and the traction mechanism 30 are reduced, the transmission efficiency is high, the intermediate transmission links such as the shaft coupling are cancelled, and at the same time, the traction sheave 33 is supported on the casing 14, so that the casing 14 shares the stress load transmitted by the traction sheave 33, the volume of the geared traction machine 100 is further reduced, the vibration and noise generated by the geared traction machine 100 during operation are reduced, the overall structure is more compact and lightweight, the application scenarios of the geared traction machine 100 are greatly expanded, the geared traction machine 100 can replace the gearless traction machine more, thereby saving energy, and the cost is low. In addition, the gear transmission module 23 in the present application can adjust the transmission ratio only by the speed reduction gear set 232, so when adjustment is needed, only the speed reduction gear set 232 needs to be adjusted, without the need to change the entire geared traction machine 100, so that the overall structure has high universality, is easy to disassemble and assemble, and has high processing efficiency. The support mechanism 10 is arranged as a split casing 14 and a cover 13, the traditional motor box accommodating the motor 21 and the gear box accommodating the gear transmission module 23 are combined into one, part of the end cover and other structural members can be omitted from the overall structure, and intermediate transmission links such as the shaft coupling are not needed, so that the overall structure is more compact, lighter, and has higher transmission efficiency.

[0063] Further, the cover 13 is provided with a first accommodating cavity 1211, the casing 14 is provided with a second accommodating cavity 1212, the motor 21 is located in the first accommodating cavity 1211, at least a part of the motor shaft 22 is located in the first accommodating cavity 1211, another part is located in the second accommodating cavity 1212, the gear transmission module 23 is located in the second accommodating cavity 1212, and at least a part of the output shaft 24 is located in the second accommodating cavity 1212, another part extends out of the second accommodating cavity 1212 and extends in a direction away from the cover 13. The first accommodating cavity 1211 accommodates the motor 21, and the second accommodating cavity 1212 accommodates the gear transmission module 23, so that the motor 21 can be easily disassembled, and the motor 21 and the gear transmission module 23 are spatially separated to prevent mutual interference. The structures and sizes of the first accommodating cavity 1211 and the second accommodating cavity 1212 can be adaptively changed according to the elements accommodated therein, so that the overall structure is more compact.

[0064] In one embodiment, the third accommodating cavity 131 is arranged on the side of the cover 13 away from the shell 14, and an encoder connected with the motor shaft 22 is arranged in the third accommodating cavity 131. The third accommodating cavity 131 facilitates the installation and removal of the encoder and saves space. The encoder is used to collect the rotating speed and rotating direction of the motor 21.

[0065] In one embodiment, the cover 13 comprises a cover body 134 and an end cover plate 135 connected with each other, and the third accommodating cavity 131 is arranged on the end cover plate 135. This further facilitates the installation and removal of the encoder. When the encoder needs to be removed, the end cover plate 135 can be removed.

[0066] In one embodiment, the cover 13 is provided with a third support portion 1341 on the side close to the shell 14, and the third accommodating cavity 131 is at least partially arranged in the cover 13, and a fourth support portion 1351 is arranged on the side wall of the cover 13 where the third accommodating cavity 131 is located. The motor shaft 22 is supported by the third support portion 1341 and the fourth support portion 1351. The third support portion 1341 and the fourth support portion 1351 can support and limit the motor shaft 22, thereby ensuring the stability of the rotation of the motor shaft 22. The internal space of the first accommodating cavity 1211 can accommodate part or all of the third accommodating cavity 131, thereby further reducing the volume. The third accommodating cavity 131 is used as a support portion of the motor shaft 22, thereby making full use of the internal space and maintaining the stability of the overall structure.

[0067] In one embodiment, the motor 21 comprises a stator 211 and a rotor 212. The stator 211 is arranged on the cover 13 along the inner wall of the cover 13 in a circumferential direction, and the rotor 212 is arranged on the motor shaft 22 in a surrounding manner. The inner wall of the stator 211 is arranged in a spaced-apart manner with the outer wall of the rotor 212 to provide a space for the rotation of the rotor 212. The stator 211 can drive the rotor 212 to rotate along the axis of the motor shaft 22, thereby driving the motor shaft 22 to rotate. In this way, the motor structure with an inner rotor is adopted, thereby making the overall volume smaller.

[0068] In the working process, when the stator 211 generates an alternating magnetic field acting on the magnetic steel of the rotor 212, the magnetic steel drives the rotor 212 to rotate, thereby providing a continuous and stable torque. The inner wall of the rotor 212 is fixedly connected with the outer wall of the motor shaft 22, and when the rotor 212 rotates, the motor shaft 22 can be synchronously rotated.

[0069] In one embodiment, the speed reduction gear set 232 comprises a first gear 2321, a transmission shaft 2322 and a second gear 2323, the first gear 2321 is in external meshing transmission connection with the input gear 231, one end of the transmission shaft 2322 is arranged in and connected with the first gear 2321, the other end of the transmission shaft 2322 is arranged in and connected with the second gear 2323, the second gear 2323 is in external meshing transmission connection with the output gear 233, the motor shaft 22 and the output shaft 24 are located on the same side of the transmission shaft 2322. The first gear 2321 and the second gear 2323 rotate synchronously through the transmission shaft 2322, the input gear 231 and the first gear 2321 constitute a first transmission, the second gear 2323 and the output gear 233 constitute a second transmission, which improves the transmission efficiency and simplifies the structure of the transmission, thereby further simplifying the structure of the power mechanism 20 and effectively improving the transmission efficiency, achieving the improvement of high speed and small size of the power mechanism 20. The first gear 2321 and the input gear 231 are in external meshing transmission connection, that is, the first gear 2321 and the input gear 231 are both in external gear meshing, and the second gear 2323 and the output gear 233 are in external meshing transmission connection, that is, the second gear 2323 and the output gear 233 are both in external gear meshing. In this way, the first gear 2321 and the second gear 2323 are arranged on the outer periphery of the input gear 231 and the output gear 233, which is convenient for disassembly and adjustment of the transmission ratio. Among them, the motor shaft 22 and the output shaft 24 are located on the same side of the transmission shaft 2322, that is, the speed reduction gear set 232 is located on the same side of the input gear 231 and the output gear 233.

[0070] In one embodiment, the number of speed reduction gear sets 232 is one, and the motor shaft 22, the output shaft 24 and the transmission shaft 2322 are arranged in parallel, in another embodiment, the motor shaft 22 and the output shaft 24 are coaxially arranged, and the number of speed reduction gear sets 232 is multiple, and multiple speed reduction gear sets 232 are equally distributed around the motor shaft 22 as the axis.

[0071] In this way, the speed reduction gear set 232 can be concentrated in the radial direction of the input gear 231 and the output gear 233, thereby making full use of the radial space and shortening the axial distance, further reducing the overall volume of the geared tractor 100, and also facilitating the disassembly of the speed reduction gear set 232. When one speed reduction gear set is used, the structure is simple, and a wide range of transmission ratios can be selected for design, which is beneficial to the optimization design of high speed and small size of the motor 21; using multiple speed reduction gear sets 232 can share the transmission power, thereby balancing the stress of the input gear 231 and the output gear 233, which is obviously beneficial to reduce the loss and improve the transmission efficiency, and makes the structure of the gear transmission module 23 more compact and has a longer service life, thereby better meeting the use requirements of larger power. When used, the number of speed reduction gear sets 232 can be selected according to the load size.

[0072] The primary gear 2321, the secondary gear 2323, the input gear 231 and the output gear 233 can adopt straight gears or bevel gears, preferably bevel gears, so as to reduce transmission wear, ensure high precision and have more reliable service life.

[0073] Preferably, in another embodiment, the number of the reduction gear sets 232 is two, which are arranged in axial symmetry with the motor shaft 22 as the axis. The two reduction gear sets 232 share the transmission power, which simplifies the structure, improves the stability of the transmission mechanism and saves the cost.

[0074] In one embodiment, the casing 14 is cylindrical, and the output portion 123 and the gear portion 124 are sequentially arranged in the axial direction. The cover 13 is connected to the gear portion 124. The outer diameters of the output portion 123 and the cover 13 are both smaller than that of the gear portion 124. The output portion 123 extends into the gear portion 124 to form a first support portion 1231. The cover extends into the gear portion to form a second support portion 1321. Here, the cylindrical shape is a substantially cylindrical shape.

[0075] Further, the output shaft 24 extends out of the output portion 123 and is connected to the traction sheave 33. The traction sheave 33 is supported on the outer wall of the output portion 123, and the output shaft 24 is supported on the inner wall of the output portion 123. In this way, the output portion 123 can share the stress load on the traction sheave 33 and the output shaft 24.

[0076] Specifically, the connection structure of the output shaft 24 and the traction sheave 33 can adopt various structures as long as the two can be connected. In one embodiment, the output shaft 24 and the traction sheave 33 are connected through the driving disc 31. One end of the driving disc 31 is sleeved on the end of the output shaft 24, and the other end is connected to the radial side of the traction sheave 33. When the motor 21 drives the output shaft 24 to rotate, the driving disc 31 is driven to rotate, and the driving disc 31 can drive the traction sheave 33 to rotate synchronously. Further, the input gear 231, the reduction gear set 232 and the output gear 233 are arranged in the gear portion 124. The reduction gear set 232 is supported on the first support portion 1231 and / or the second support portion 1321, and the motor shaft 22 is supported on the second support portion 1321. The side of the gear portion 124 close to the output portion 123 avoids the traction sheave 33, so that the traction sheave 33 partially covers the gear portion 124. The first support portion 1231 and the second support portion 1321 can be used to support the motor shaft 22, the reduction gear set 232 and the output shaft 24 and other components in the casing 14, so that the structure is more compact and stable. By designing the side of the gear portion 124 close to the output portion 123 to avoid the traction sheave 33, the overall structure is more compact, and the structural strength of the gear portion 124 is increased.

[0077] Further, the driving disc 31 is provided with a shaft hole 314, the output shaft 24 extends out of the output part 123 and into the shaft hole 314, and the driving disc 31 is connected with the output shaft 24 through the spline structure 25. The spline structure 25 can make the force between the driving disc 31 and the output shaft 24 more even, prevent stress concentration, and can bear greater stress load.

[0078] Specifically, the spline structure 25 includes an inner spline 251 and an outer spline 252, the inner spline 251 is arranged on the inner wall of the shaft hole 314 of the driving disc 31, and the outer spline 252 is arranged on the outer wall of the output shaft 24; wherein the driving disc 31 is sleeved on the output shaft 24 and is fixedly connected through the engagement of the outer spline 252 and the inner spline 251.

[0079] The tooth top of the outer spline 252 and the groove bottom of the tooth groove of the inner spline 251 are provided with a gap 253. In this way, the gap 253 provides a space for extrusion of the outer spline 252 and the inner spline 251, so that they are flexibly matched, thereby significantly reducing the direct disturbance of the load deformation of the traction mechanism 30 to the output shaft 24, preventing structural deformation and facilitating adjustment during assembly.

[0080] Specifically, in this embodiment, the spline structure 25 is a involute spline, which is better engaged. In another embodiment, the spline structure 25 can also be arranged as a triangular spline.

[0081] In one embodiment, please refer to Figures 6-7 , the division circle tooth thickness X of the outer spline 252 is greater than the division circle tooth thickness Y of the inner spline 251, so that the outer spline 252 and the inner spline 251 form a gap 253 after engagement. The gap 253 is formed by the structure of the outer spline 252 and the inner spline 251 itself, without the need for additional process to open the gap 253, which is convenient for processing.

[0082] In one embodiment, the support mechanism 10 further includes a front support 11. The front support 11 is connected with the casing 14, and one end of the driving disc 31 connected with the output shaft 24 is supported on the front support 11. In this way, the reduction gear set 232 is supported on the first support part 1231 and / or the second support part 1321, the motor shaft 22 is supported on the second support part 1321, and the output shaft 24 is supported on the output part 123 and the front support 11, so that the support mechanism 10 shares the stress, avoids that the output shaft 24 directly bears the load, thereby reducing the deformation of the output shaft 24, reducing the disturbance and noise in the running process of the output shaft 24, making the gear pair in the gear transmission module 23 run quietly and reliably, and meeting the use requirements of low vibration and low noise in running.

[0083] Specifically, bearings can be provided on the outer wall of the output portion 123, through which the traction wheel 33 is connected, and bearings can also be provided on the inner wall of the output portion 123, through which the output shaft 24 is connected. Bearings can be provided on the first support portion 1231 and the second support portion 1321 to connect the reduction gear set 232 and the motor shaft 22. The transmission shaft 2322 in the reduction gear set 232 can be connected to one or both of the first support portion 1231 and the second support portion 1321 to make the overall structure stable, reduce vibration, and reduce noise. The traction wheel 33 partially covers the gear portion 124, so that the overall axial distance is shortened, and the input gear 231, the reduction gear set 232, and the output gear 233 are installed in the internal space of the traction wheel 33. Part of the outer periphery of the gear portion 124 can be bent in a direction radially outward of itself to form an avoidance space 1213. The outer diameter of the first gear 2321 is greater than the outer diameter of the second gear 2323, and the avoidance space 1213 can just accommodate the first gear 2321. In this way, space is not wasted, and the strength of the shell is increased by the bent part. At the same time, the overall structure is more compact, and the volume is further reduced.

[0084] In one embodiment, the traction mechanism 30 further includes a brake wheel 32. The brake wheel 32 is connected to the traction wheel 33 near one side of the gear portion 124, and a brake 40 acting on the brake wheel 32 is provided on the outer wall of the gear portion 124. In this way, the brake can be installed in the external space of the gear portion 124 and be in close proximity to the brake wheel 32 to achieve reliable braking.

[0085] Specifically, the brake wheel 32 and the traction wheel 33 can be in an integrated structure or in a separate structure. The brake wheel 32 is sleeved on the output portion 123 or the gear portion 124 adjacent to the traction wheel 33. The brake wheel 32 rotates with the rotation of the traction wheel 33. The brake 40 and the brake wheel 32 can adopt radial braking or axial braking.

[0086] In one embodiment, the brake wheel 32 includes a driving portion 322 and a braking portion 321. The driving portion 322 is connected to the traction wheel 33, and the braking portion 321 is connected to the driving portion 322 and extends away from the driving portion 322. When axial braking is adopted, the braking portion 321 extends in the radial direction of the traction wheel 33, and when radial braking is adopted, the braking portion 321 extends in the radial direction of the traction wheel 33 and then extends in the axial direction of the output shaft 24 and extends into the shell 14. The side of the traction wheel 33 close to the cover 13 can abut against the radial side of the braking portion 321. In this way, at least part of the space occupied by the brake wheel 32 overlaps the space occupied by the shell 14, thereby further reducing the space.

[0087] Further, when the radial brake is adopted, the housing 14 has a receiving groove 122 facing away from the cover 13, the receiving groove 122 surrounds a gear portion 124, and the brake portion 321 extends into the receiving groove 122. In this way, the space occupied by the receiving groove 122 overlaps the space occupied by the gear portion 124, so that the addition of the receiving groove 122 does not increase the length of the support mechanism 10 in the axial direction, and the size of the mechanism is reduced.

[0088] Further, the outer side wall of the gear portion 124 is provided with at least two brakes 40, at least a part of the brakes 40 extends into the receiving groove 122 and can abut against the brake portion 321, the inside of the brakes 40 has a brake plate, and when the brakes 40 act, the brake plate is in contact with the outer wall of the brake portion 321 under the action of the spring and is locked, thereby achieving the brake effect.

[0089] In one embodiment, as shown in Figure 1 and Figure 5 When the number of the reduction gear set 232 is multiple, the gear transmission module 23 further comprises an adjusting assembly 435, the adjusting assembly 435 comprises an inner sleeve 4351, an outer sleeve 4352 and a fastener 4353, the outer sleeve 4352 is sleeved outside the inner sleeve 4351, and the fastener 4353 connects the inner sleeve 4351 and the outer sleeve 4352 in the axial direction and is used for adjusting the spacing between the inner sleeve 4351 and the outer sleeve 4352 in the axial direction, so as to adjust the expansion degree of the adjusting assembly 435 in the radial direction; wherein, the adjusting assembly 435 is arranged between at least one primary gear 2321 and the transmission shaft 2322, and / or between at least one secondary gear 2323 and the transmission shaft 2322. The adjusting assembly 435 is used for adjusting the circumferential position of the primary gear 2321 and / or the secondary gear 2323 on the transmission shaft 2322, so as to adjust the relative circumferential angle between the secondary gear 2323 and the primary gear 2321, and couple the primary gear 2321 and / or the secondary gear 2323 with the transmission shaft 2322 for transmission. In one embodiment, for example, the primary gear 2321 and the input gear 231 are assembled first, and the engagement between the primary gear 2321 and the input gear 231 is adjusted by arranging the adjusting assembly 435. The relative circumferential angle between the secondary gear 2323 and the primary gear 2321 can be adjusted by the adjusting assembly 435, and then the secondary gear 2323 is expanded to engage with the output gear 233 for transmission, which greatly reduces the difficulty of assembly and adjustment.

[0090] Specifically, in an embodiment, the adjusting assembly 435 comprises an inner sleeve 4351, an outer sleeve 4352, and a fastener 4353, at least a portion of the inner sleeve 4351 is arranged in the outer sleeve 4352, and a clearance 4354 is arranged between the inner sleeve 4351 and the outer sleeve 4352 along the axial direction of the inner sleeve 4351, so that the inner sleeve 4351 can move axially relative to the outer sleeve 4352, and the thickness of the adjusting assembly 435 in the radial direction (i.e., the degree of expansion in the radial direction) can be adjusted when the inner sleeve 4351 moves axially relative to the outer sleeve 4352, so that the expansion can be realized to connect the primary gear 2321 and / or the secondary gear 2323 with the transmission shaft 2322; the fastener 4353 is arranged along the axial direction and penetrates the inner sleeve 4351 and is connected with the outer sleeve 4352, so as to adjust the distance between the inner sleeve 4351 and the outer sleeve 4352 in the axial direction, and adjust the degree of expansion of the adjusting assembly 435 in the radial direction.

[0091] In an embodiment, the inner sleeve 4351 comprises an expansion part 4351a and a limiting part 4351b, the expansion part 4351a is arranged along the axial direction of the elastic member, the limiting part 4351b is arranged along the thickness direction of the expansion part 4351a to form a step 4351c, the step 4351c is limitedly matched with one end of the outer sleeve 4352 close to the limiting part 4351b, so as to avoid the inner sleeve 4351 from being separated from the other end of the outer sleeve 4352, wherein the fastener 4353 penetrates the limiting part 4351b and extends into the outer sleeve 4352 to connect the inner sleeve 4351 and the outer sleeve 4352. The clearance 4354 is arranged between the limiting part 4351b and the outer sleeve 4352, and the clearance 4354 provides a space for the movement of the inner sleeve 4351, so that the inner sleeve 4351 can move axially when the fastener 4353 applies axial pressure to the limiting part 4351b.

[0092] Preferably, the outer side wall of the inner sleeve 4351 is arranged as a first tapered surface 4351d, the inner side wall of the outer sleeve 4352 is arranged as a second tapered surface 4352a, and the first tapered surface 4351d is matched with the second tapered surface 4352a to guide the axial movement of the inner sleeve 4351 towards the outer sleeve 4352, and make the connection between the secondary gear 2323 and the transmission shaft 2322 more stable.

[0093] In an embodiment, the number of the fasteners 4353 is multiple, and the multiple fasteners 4353 are uniformly distributed along the circumferential direction of the inner sleeve 4351, so as to realize expansion at multiple positions, and ensure that the primary gear 2321 and / or the secondary gear 2323 can be tightly connected with the transmission shaft 2322 at each position and stably driven.

[0094] In an embodiment, the adjusting assembly 435 is arranged as an expansion connecting sleeve.

[0095] Compared with the prior art, the high-precision hard tooth surface helical gear transmission is adopted, transmission wear is small, transmission efficiency is high, and operation life is more reliable; according to the load size demand, the reduction gear set 232 can be arranged in one group or multiple groups, load multiple gear sharing is realized, transmission wear is small, vibration and noise are small, transmission efficiency is high, operation life is more reliable, and the design versatility is strong for different transmission ratios; by changing the structure layout of the geared tractor 100, the traction wheel 33, the motor 21 and the gear transmission module 23 are combined into one, the transmission links between the power mechanism 20 and the traction mechanism 30 are less, the transmission efficiency is high, the disturbance to the gear transmission is significantly reduced, the low vibration and low noise of the gear transmission are ensured, the vibration and noise generated by the geared tractor 100 during operation are reduced, the transmission efficiency is high, and the operation life is more reliable; at the same time, on the basis of realizing the above low vibration, low noise and high efficiency transmission structure and performance, the motor part can be further realized high speed and miniaturization, thereby improving the efficiency and reducing the cost; the overall structure of the tractor is more compact and lightweight, which greatly expands the application scenarios of the geared tractor 100, so that the geared tractor 100 can replace the gearless tractor more, thereby saving energy, and the cost is low.

[0096] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0097] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A geared tractor, comprising a power mechanism (20) and a traction mechanism (30), the traction mechanism (30) comprising a traction wheel (33), the power mechanism (20) being capable of driving the traction wheel (33) to rotate; characterized in that the power mechanism (20) comprising a motor (21) and a gear transmission module (23), the gear transmission module (23) comprising an input gear (231), a speed reduction gear set (232), an output gear (233) and an output shaft (24), the output gear (233) being connected to one end of the output shaft (24), an output end of a motor shaft (22) of the motor (21) being connected with the input gear (231), the input gear (231) being in driving connection with an input end of the speed reduction gear set (232), an output end of the speed reduction gear set (232) being in driving connection with the output gear (233), the other end of the output shaft (24) being connected with the traction wheel (33); the geared tractor further comprising a support mechanism (10), the support mechanism (10) comprising a machine shell (14) and a machine cover (13), the machine cover (13) being arranged on one side of the machine shell (14), the motor (21) being arranged in the machine cover (13), the gear transmission module (23) being arranged in the machine shell (14), the motor shaft (22) extending from the machine cover (13) into the machine shell (14), the machine shell (14) extending into the traction wheel (33) near one end of the output shaft (24) to support the traction wheel (33); wherein the machine shell (14) is in a cylindrical shape, sequentially comprising an output part (123) and a gear part (124) along an axial direction, the machine cover (13) being connected to the gear part (124), the output part (123) and the machine cover (13) both having an outer diameter smaller than the gear part (124), the output part (123) extending out of a first support part (1231) into the gear part (124), the machine cover (13) extending out of a second support part (1321) into the gear part (124); the output shaft (24) extending from the output part (123) and being connected with the traction wheel (33), the traction wheel (33) being supported on an outer wall of the output part (123), the output shaft (24) being supported on an inner wall of the output part (123); the input gear (231), the speed reduction gear set (232) and the output gear (233) being arranged in the gear part (124), the speed reduction gear set (232) being supported on the first support part (1231) and / or the second support part (1321), the motor shaft (22) being supported on the second support part (1321).

2. The geared traction machine of claim 1, wherein, the motor (21) comprising a stator (211) and a rotor (212), the stator (211) being arranged on the machine cover (13) along an inner wall of the machine cover (13) in a circumferential direction, the rotor (212) being arranged around the motor shaft (22).

3. The geared tractor of claim 1, wherein, The reduction gear set (232) comprises a primary gear (2321), a transmission shaft (2322) and a secondary gear (2323); The primary gear (2321) is in external meshing transmission connection with the input gear (231); One end of the transmission shaft (2322) is arranged in the primary gear (2321) and connected with the primary gear (2321), and the other end of the transmission shaft (2322) is arranged in the secondary gear (2323) and connected with the secondary gear (2323); The secondary gear (2323) is in external meshing transmission connection with the output gear (233); The motor shaft (22) and the output shaft (24) are located on the same side of the transmission shaft (2322).

4. The geared tractor of claim 1, wherein, The traction mechanism (30) further comprises a driving disc (31), one end of the driving disc (31) is connected with one end of the output shaft (24) which extends out of the output part (123), and the other end of the driving disc (31) is connected with the radial side of the traction wheel (33).

5. The geared tractor of claim 4, wherein, The driving disc (31) is provided with a shaft hole (314), the output shaft (24) extends into the shaft hole (314) and is connected with the driving disc (31), and the driving disc (31) and the output shaft (24) are connected through a spline structure (25); the spline structure (25) comprises an inner spline (251) and an outer spline (252) which are in meshing connection with each other, the inner spline (251) is arranged on the inner wall of the shaft hole (314), the outer spline (252) is arranged on the outer wall of the output shaft (24), and a gap (253) is arranged between the outer spline (252) and the inner spline (251).

6. The geared tractor of claim 4, wherein, The support mechanism (10) further comprises a front support (11), the front support (11) is connected with the machine shell (14), and one end of the driving disc (31) and the output shaft (24) is supported on the front support (11).

7. The geared tractor of claim 3, wherein, The number of the reduction gear set (232) is one, and the motor shaft (22), the output shaft (24) and the transmission shaft (2322) are arranged in parallel; Alternatively, the motor shaft (22) and the output shaft (24) are coaxially arranged, the number of the reduction gear set (232) is multiple, and multiple reduction gear sets (232) are equally distributed around the motor shaft (22).

8. The geared tractor of claim 7, wherein, The number of the deceleration gear sets (232) is multiple, and the gear transmission module (23) further comprises an adjusting assembly (435), the adjusting assembly (435) comprises an inner sleeve (4351), an outer sleeve (4352) and a fastener (4353), the outer sleeve (4352) is sleeved outside the inner sleeve (4351), and the fastener (4353) is connected with the inner sleeve (4351) and the outer sleeve (4352) in the axial direction and is used for adjusting the axial distance between the inner sleeve (4351) and the outer sleeve (4352) so as to adjust the radial expansion degree of the adjusting assembly (435); wherein, the adjusting assembly (435) is arranged between at least one of the primary gears (2321) and the transmission shaft (2322) and / or at least one of the secondary gears (2323) and the transmission shaft (2322).

9. The geared tractor of claim 1, wherein, The traction mechanism (30) further comprises a brake wheel (32), the brake wheel (32) comprises a driving part (322) and a brake part (321), the traction wheel (33) is arranged on the outer periphery of the driving part (322), the driving part (322) is supported on the outer wall of the output part (123), and the brake part (321) is connected with the driving part (322) and is used for cooperating with the brake (40).

10. The geared tractor of claim 9, wherein, The gear part (124) avoids the traction wheel (33) on one side close to the output part (123), so that the brake part (321) partially covers the gear part (124), and the outer wall of the gear part (124) is provided with the brake (40) acting on the brake part (321).

11. The geared tractor of claim 1, wherein, The machine cover (13) is provided with a third accommodating cavity (131) away from the machine shell (14), and the third accommodating cavity (131) is provided with an encoder connected with the motor shaft (22); the machine cover (13) comprises a cover body (134) and an end cover plate (135) connected with each other, and the third accommodating cavity (131) is arranged on the end cover plate (135); the machine cover (13) is provided with a third supporting part (1341) close to the machine shell (14), the third accommodating cavity (131) is at least partially located in the machine cover (13), and a fourth supporting part (1351) is arranged on the side wall of the side of the machine cover (13) where the third accommodating cavity (131) is located, and the motor shaft (22) is supported on the third supporting part (1341) and the fourth supporting part (1351).

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