Traction machine and assembling method thereof

Abstract

The invention relates to the technical field of elevators, in particular to a traction machine and an assembling method thereof. The traction machine comprises a main box body, a driving shaft, a transmission assembly, an output shaft and a brake assembly, the driving shaft and the transmission assembly are installed on the main box body, and the transmission assembly is in transmission connection with the driving shaft; one end of the output shaft is in transmission connection with the transmission assembly, and the other end of the output shaft forms an output end; the braking assembly is connected with the main box body and can brake the output end; wherein the driving shaft and the output shaft are coaxially arranged, and the orthographic projection of the driving shaft and the orthographic projection of the output shaft are at least partially overlapped in the radial direction of the driving shaft. The traction machine has the advantages that the overlapped part of the driving shaft and the output shaft in the axial direction is the shortened axial distance of the driving shaft and the output shaft, so that the axial length of the traction machine is shortened, the size of the traction machine is reduced, and light weight and miniaturization of the traction machine are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a traction machine and an assembly method thereof. Background Art

[0002] The elevator traction machine is the power equipment of the elevator, which is generally installed in the elevator machine room or elevator shaft to provide power for the operation of the elevator.

[0003] An elevator traction machine usually includes components such as a drive assembly, a transmission assembly, an output assembly, a brake assembly and a traction wheel. If the drive assembly is used as a power source and an electric motor is used, the motor reduces the speed and increases the torque through the transmission assembly, and then outputs power through the output assembly to drive the traction wheel to rotate, and uses the friction between the wire rope and the wheel groove to drive the car and counterweight assembly to move up and down. The brake assembly is used to brake the output assembly to ensure the safe operation of the elevator. Specifically, if the motor transmits power to the output shaft through a gear transmission assembly or a reduction box, the output shaft drives the traction wheel to rotate, and the brake assembly uses a brake to brake the output shaft.

[0004] In the existing traction machines, the above-mentioned components with different functions are usually arranged in a decentralized manner, that is, the drive component, transmission component, output component and brake component are installed separately. For example, in CN110040612B, the drive component, i.e. the motor, the transmission component, i.e. the reducer and the brake component, i.e. the brake, are all independently arranged, and each independent structure is connected to form a structural layout arranged separately along the vertical direction of its installation. This results in a large space occupied by each structure, a large overall size of the traction machine, and low space utilization, which does not conform to the current development trend of miniaturization and integration of traction machines. In addition, there are many transmission links and high costs. Summary of the invention

[0005] In view of the technical problem that the above-mentioned traction machine has a large overall structure size and occupies a large space due to the independent arrangement and dispersed layout of various components, the present invention provides a traction machine.

[0006] A traction machine comprises: a main housing; a drive shaft mounted on the main housing, a transmission assembly mounted on the main housing and in transmission connection with the drive shaft; an output shaft, one end of which is in transmission connection with the transmission assembly, and the other end of the output shaft constitutes an output end; a brake assembly connected to the main housing and capable of braking the output end; wherein the drive shaft and the output shaft are coaxially arranged, and along the radial direction of the drive shaft, the orthographic projection of the drive shaft at least partially overlaps with the orthographic projection of the output shaft.

[0007] With such an arrangement, the axially overlapping portion of the drive shaft and the output shaft is the shortened axial distance between the two, thereby reducing the axial length of the traction machine, thereby reducing the volume of the traction machine, which is conducive to achieving lightweight and miniaturization of the traction machine.

[0008] In one embodiment, a positioning groove is formed in one of the output shaft and the drive shaft, and an end of the other extends into the positioning groove and is rotatably connected to the positioning groove.

[0009] In one embodiment, the main housing is integrally formed with a drive cavity and a transmission cavity;

[0010] A part of the drive shaft is accommodated in the drive cavity, and another part of the drive shaft passes through the drive cavity and extends to the transmission cavity to form a transmission input shaft. The transmission input shaft cooperates with the transmission assembly, and the transmission assembly is accommodated in the transmission cavity; at least a part of the output shaft is located in the transmission cavity and is rotatably matched with the transmission input shaft.

[0011] In one embodiment, a support structure is connected to a side of the main housing forming the transmission cavity, and one end of the output shaft connected to the transmission input shaft is supported by the support structure.

[0012] In one embodiment, an opening is formed on a side of the drive cavity away from the transmission cavity, and the opening is fitted with an end cover. An open end of the transmission cavity away from the drive cavity is fitted with an output seat;

[0013] The output seat includes a first seat body and a second seat body. The first seat body is connected to the main housing. The second seat body protrudes towards the drive cavity, and the second seat body forms the support structure. A receiving cavity is formed between the second seat body and the first seat body. The receiving cavity is communicated with the transmission cavity and is used for accommodating at least part of the structure of the transmission assembly therein.

[0014] In one embodiment, the transmission assembly includes a first transmission gear, a transmission shaft and a second transmission gear. The first transmission gear and the second transmission gear are both connected to the outer peripheral side of the transmission shaft and are coaxially arranged with the transmission shaft. The first transmission gear is in transmission connection with the transmission input shaft, and the second transmission gear is in transmission connection with the output shaft;

[0015] The transmission input shaft and the transmission shaft are arranged parallel to each other up and down, and at least a part of the second transmission gear is located in the receiving cavity.

[0016] In one embodiment, the transmission assembly includes an input gear, a first transmission gear, a transmission shaft, a second transmission gear, and an output gear. The first transmission gear and the second transmission gear are both connected to the outer peripheral side of the transmission shaft and are coaxially arranged with the transmission shaft. The input gear is arranged on the transmission input shaft, the first transmission gear is in transmission connection with the input gear, the output gear is arranged on the output shaft, and the second transmission gear is in transmission connection with the output gear;

[0017] The output shaft and the transmission shaft are arranged parallel to each other vertically, and at least part of the output gear and / or the second transmission gear is located in the accommodation cavity.

[0018] In one embodiment, the main housing includes an integrally formed driving seat and a supporting seat. A driving cavity is formed in the driving seat, a transmission cavity is formed in the supporting seat, a bearing seat is arranged between the driving cavity and the transmission cavity, the driving cavity and the transmission cavity are separated into two chambers by the bearing seat, and a communication hole is formed in the bearing seat to communicate the driving cavity and the transmission cavity;

[0019] Both ends of the driving shaft are rotatably connected to the end cover and the bearing seat through a first bearing group respectively. One end of the transmission input shaft far from the driving shaft is rotatably connected to the output shaft through a positioning bearing, and both ends of the output shaft are rotatably connected to the output seat and the braking assembly through a third bearing group respectively.

[0020] In one embodiment, the braking assembly includes a brake bracket. The brake bracket is spaced from the main housing to form an accommodation space. The traction wheel of the traction machine is located in the accommodation space. An installation seat is arranged on one side of the main housing facing the brake bracket. The installation seat abuts against the brake bracket, and a connecting member is arranged between the brake bracket and the main housing. One end of the connecting member is connected to the main housing, and the other end passes through the accommodation space and is connected to the brake bracket.

[0021] The present invention also provides an assembly method applicable to the assembly of the traction machine as described above. The main housing includes an integrally arranged driving seat and a supporting seat, and an output seat detachably connected to the supporting seat. The method includes: connecting the output shaft to the output seat; connecting the output seat to the supporting seat.

[0022] In one embodiment, the traction machine further includes a connecting member. An installation seat is arranged on one side of the supporting seat facing the braking assembly, and a bolt is arranged on one side of the braking assembly facing the supporting seat. The assembly method includes: inserting the bolt into the installation seat; connecting both ends of the connecting member to the supporting seat and the braking assembly respectively.

[0023] Compared with the prior art, the present invention uses a drive shaft and an output shaft with a shaft nested inside a shaft, allowing a part of the drive shaft to extend into the interior of the output shaft, and the positioning bearing for fixing the drive shaft is also arranged inside the output shaft. This not only reduces the axial space occupied by the drive shaft and the output shaft, but also enables the main housing to reduce the machining of a bearing chamber, while achieving the miniaturization of the traction machine and the convenience of machining. By providing an output seat detachably connected to the main housing, the fourth bearing and the third bearing group are both limited to the output seat. Therefore, the output seat undertakes the structure of at least three bearing chambers, and because it is detachably connected to the main housing, the two can be machined separately without being integrally cast, greatly reducing the process difficulty, simplifying the internal structure of the main housing and the installation process, reducing the manufacturing and maintenance costs, and improving the maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of one embodiment of the traction machine provided by the present invention;

[0025] Figure 2 A side view of one embodiment of the traction machine provided by the present invention;

[0026] Figure 3 A top view of one embodiment of the traction machine provided by the present invention;

[0027] Figure 4 A schematic structural diagram of one embodiment of the drive shaft of the traction machine provided by the present invention;

[0028] Figure 5 A schematic structural diagram of one embodiment of the output shaft of the traction machine provided by the present invention;

[0029] Figure 6 A cross-sectional view of one embodiment of the drive seat and the support seat of the traction machine provided by the present invention;

[0030] Figure 7 is Figure 1 a partial enlarged view at A in

[0031] Figure 8 A cross-sectional view of one embodiment of the output seat of the traction machine provided by the present invention;

[0032] Figure 9 An exploded view of the structure of one embodiment of the traction machine provided by the present invention;

[0033] Figure 10 A front view of one embodiment of the output seat of the traction machine provided by the present invention;

[0034] Figure 11Schematic structural diagram of one embodiment of the rope retaining rod of the traction machine provided by the present invention;

[0035] Figure 12 is Figure 1 partial enlarged view at B in

[0036] The meanings of the symbols in the figure are as follows:

[0037] 100, traction machine; 10, main housing; 11, drive seat; 1111, second input hole; 112, end cover; 1121, first input hole; 12, support seat; 121, transmission groove; 122, second transmission step; 13, drive cavity; 14, second connecting ear; 15, mounting seat; 16, output seat; 161, first seat body; 1611, flange; 1612, first output hole; 162, second seat body; 1621, connecting section; 1622, support section; 1623, second output hole; 1624, second output step; 1625, transmission hole; 18, transmission cavity; 19, bearing seat; 20, braking assembly; 21, brake bracket; 211, first connecting ear; 2111, first connecting hole; 213, second fixing hole; 22, brake; 221, fixing piece; 222, first fixing hole; 223, moving plate; 224, static plate; 23, rope retaining rod; 231, mounting section; 2311, mounting hole; 232, rope retaining section; 24, connecting piece; 30, drive assembly; 311, first bearing; 312, second bearing; 32, drive shaft; 321, positioning step; 322, drive section; 323, transmission section; 3231, transmission input shaft; 325, input gear; 33, stator; 34, rotor; 40, transmission assembly; 411, third bearing; 412, fourth bearing; 42, transmission shaft; 421, first transmission step; 43, second limit seat; 431, second mating section; 432, second limit section; 44, first transmission gear; 45, second transmission gear; 50, output assembly; 511, fifth bearing; 512, sixth bearing; 52, output shaft; 521, first output step; 522, third output step; 523, positioning groove; 524, positioning bearing; 525, first connecting section; 526, second connecting section; 527, third connecting section; 53, first limit seat; 531, first mating section; 532, first limit section; 54, output gear; 60, traction wheel. Detailed implementation manners

[0038] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the specific embodiments of the present application in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0039] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the specification of the present application are only for illustrative purposes and do not represent the only implementation manner.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such 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 specifically defined.

[0041] In the present application, unless otherwise clearly defined and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0042] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing 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.

[0043] Please refer to Figures 1-11, the present invention provides a traction machine 100, a part of the drive shaft 32 extends into the interior of the output shaft 52, thereby reducing the occupation of the axial space by the drive shaft 32 and the output shaft 52, and saving the occupation of the height space, which is beneficial to the traction machine 100 to achieve lightweight and miniaturization.

[0044] Please refer to Figures 1-3 , the traction machine 100 includes a main housing 10, a drive shaft 32, a transmission assembly 40, an output shaft 52 and a brake assembly 20. The drive shaft 32 is installed in the main housing 10, the transmission assembly 40 is installed on the main housing 10 and is in transmission connection with the drive shaft 32; one end of the output shaft 52 is in transmission connection with the transmission assembly 40, the other end of the output shaft 52 constitutes an output end, the brake assembly 20 is connected to the main housing 10 and brakes the output end. The drive shaft 32 and the output shaft 52 are coaxially arranged. Along the radial direction of the drive shaft 32, the orthographic projection of the drive shaft 32 and the orthographic projection of the output shaft 52 at least partially overlap. Please refer to Figure 1 , define the orthographic projection of the drive shaft 32 as the first projection, and the orthographic projection of the output shaft 52 as the second projection. The first projection and the second projection at least partially overlap. The drive shaft 32 and the output shaft 52 can form a plug-in fit, and one of the drive shaft 32 and the output shaft 52 extends into the other, and the overlapping part of the two in the axial direction is the shortened axial distance of the two. Therefore, the axial length of the traction machine 100 is reduced. At the same time, because the drive shaft 32 and the output shaft 52 are coaxially arranged, the height occupation space of the traction machine 100 is reduced, thereby reducing the volume of the traction machine 100, which is beneficial to the lightweight and miniaturization of the traction machine 100.

[0045] A positioning groove 523 is formed in one of the output shaft 52 and the drive shaft 32, and the end of the other extends into the positioning groove 523 and is rotatably connected to the positioning groove 523. In this way, the output shaft 52 and the drive shaft 32 can support each other, improving the rotational stability of the drive shaft 32 and the output shaft 52, and there is no need to additionally provide other components to help fix the two.

[0046] Preferably, please refer to Figure 5 , a positioning groove 523 is formed at the end of the output shaft 52, and a positioning bearing 524 is arranged in the positioning groove 523. The positioning bearing 524 is sleeved on the end of the drive shaft 32, so that the relative rotation of the drive shaft 32 and the output shaft 52 is smoother and the limiting effect on the drive shaft 32 is improved.

[0047] In this embodiment, since the drive shaft 32, the transmission shaft 42, and the output shaft 52 include at least three rotating shafts, in order to ensure the rotational stability of the rotating shafts, at least two bearings are sleeved on the outer peripheral side of each rotating shaft. With the above arrangement, the positioning bearing 524 originally disposed between the drive shaft 32 and the inner wall of the main housing 10 is transferred between the drive shaft 32 and the output shaft 52. Therefore, one bearing chamber can be reduced in the machining of the main housing 10, thereby reducing the machining difficulty and manufacturing cost of the main housing 10. Moreover, the positioning bearing 524 can make the rotation of the drive shaft 32 more stable, largely avoiding the overall machine vibration and noise caused by gear meshing.

[0048] In other embodiments, a positioning groove 523 can also be provided at the end of the drive shaft 32, and the end of the output shaft 52 can be inserted into the positioning groove 523, which can also achieve the above technical effects, and is not limited to the embodiment where the drive shaft 32 extends into the output shaft 52.

[0049] As Figure 4 shown, a positioning step 321 is formed on the outer peripheral side of the end of the drive shaft 32 close to the output shaft 52. Along the axial direction of the drive shaft 32, the positioning step 321 abuts against one side of the positioning bearing 524, and the other side of the positioning bearing 524 abuts against the bottom of the positioning groove 523. In this way, both end faces of the positioning bearing 524 in the axial direction are limited, further fixing the position of the positioning bearing 524 and reducing its wobbling.

[0050] A fifth bearing 511 is sleeved on the outer peripheral side of the end of the output shaft 52 close to the drive shaft 32. The fifth bearing 511 is located radially outside the positioning bearing 524 and is coaxially arranged with the positioning bearing 524. In this way, in the radial direction, the positioning bearing 524 and the fifth bearing 511 can share the stress, and make the structure more compact, preventing stress offset.

[0051] The main housing 10 is integrally formed with a drive cavity 13 and a transmission cavity 18; a part of the drive shaft 32 is accommodated in the drive cavity 13, and another part of the drive shaft 32 passes through the drive cavity 13 and extends to the transmission cavity 18 to form a transmission input shaft 3231. The transmission input shaft 3231 cooperates with the transmission assembly 40, and the transmission assembly 40 is accommodated in the transmission cavity 18; at least a part of the output shaft 52 is located in the transmission cavity 18 and is rotationally matched with the transmission input shaft 3231. The transmission input shaft 3231 is used for driving connection with the transmission assembly 40, and an input gear 325 is provided on the outer peripheral side of the transmission input shaft 3231 for driving connection with the transmission assembly 40. An output gear 54 is provided on the output shaft 52 for driving connection with the transmission assembly 40.

[0052] Please refer to Figure 6, the main housing 10 includes a driving seat 11 and a supporting seat 12 which are integrally connected. The supporting seat 12 is detachably connected with an output seat 16. A driving cavity 13 is formed inside the driving seat 11, and a transmission cavity 18 is formed inside the supporting seat 12. The output seat 16 can be connected to the output assembly 50 and then assembled into the supporting seat 12. A bearing seat 19 is provided between the driving cavity 13 and the transmission cavity 18. The driving cavity 13 and the transmission cavity 18 are separated into two chambers by the bearing seat 19, and a communication hole is also formed in the bearing seat 19 to communicate the driving cavity 13 and the transmission cavity 18.

[0053] Please refer to Figure 4 , a stator 33 and a rotor 34 are arranged on the outer peripheral side of the driving shaft 32. The stator 33 is installed in the driving cavity 13 and connected to the driving seat 11. When the stator 33 is electrified, it can drive the rotor 34 to rotate. The rotor 34 is connected to the driving shaft 32, thereby driving the driving shaft 32 to rotate.

[0054] The transmission assembly 40 includes a transmission shaft 42 and a first transmission gear 44. The first transmission gear 44 is sleeved on the outer peripheral side of the transmission shaft 42 and meshed with an input gear 325 on the driving shaft 32. The transmission shaft 42 is then meshed with an output gear 54 on the output shaft 52 through a second transmission gear 45, and drives the traction wheel 60 to rotate through the output shaft 52. Along the radial direction of the output shaft 52, the output shaft 52 includes a first connecting section 525, a second connecting section 526 and a third connecting section 527 which are connected in sequence. The outer diameter of the second connecting section 526 is larger than that of the first connecting section 525 and the second connecting section 526 to form a first output step 521 and a third output step 522;

[0055] A fifth bearing 511 is sleeved on the outer peripheral side of the first connecting section 525 and abuts against the first output step 521. An output gear 54 which is arranged in a driven manner is connected to the outer peripheral side of the second connecting section 526. The output gear 54 is in transmission connection with the transmission assembly 40. A sixth bearing 512 is sleeved on the outer peripheral side of the third connecting section 527. The outer peripheral side of the sixth bearing 512 abuts against the main housing 10, and one axial side of the sixth bearing 512 abuts against the third output step 522.

[0056] In this way, after the outer diameter of the second connecting section 526 is larger than that of the first connecting section 525 and the third connecting section 527, a drop on the outer peripheral side is naturally formed, thereby forming the first output step 521 and the third output step 522. The first output step 521 is used to fix the fifth bearing 511 and reduce the axial movement of the fifth bearing 511. The third output step 522 is used to fix the sixth bearing 512 and reduce the axial movement of the sixth bearing 512. The output gear 54 is connected to the second connecting section 526, responds to the power transmitted by the transmission assembly 40, and drives the entire output shaft 52 to rotate, thereby driving the traction wheel 60 to rotate.

[0057] The positioning groove 523 is formed in the first connecting section 525. A connecting pin is connected to the outer side of the third connecting section 527, and the connecting pin is clamped with the traction wheel 60. In this way, the connection strength between the third connecting section 527 and the traction wheel 60 is high, and the load that can be borne by the clamping connection between the connecting pin and the traction wheel 60 is greater.

[0058] In other embodiments, two connecting pins can also be added to further improve the connection strength between the third connecting section 527 and the traction wheel 60.

[0059] The drive shaft 32 includes a drive section 322 and a transmission section 323. The drive section 322 is located in the drive cavity 13, and both the first bearing 311 and the second bearing 312 are connected to the drive section 322; the transmission section 323 and the drive section 322 are integrally provided, and the transmission section 323 extends out of the drive cavity 13 and extends into the positioning groove 523, and the transmission section 323 is in transmission connection with the transmission assembly 40. In this way, the drive section 322 is specifically used for the limiting function of the stable rotation of the drive shaft 32, while the transmission section 323 constitutes the transmission input shaft 3231 and bears the role of transmitting power.

[0060] Please refer to Figure 7 , the drive shaft 32 is connected to the drive seat 11 through the first bearing 311 and the second bearing 312, the transmission assembly 40 is in transmission connection with the drive shaft 32, and one end of the transmission assembly 40 is connected to the support seat 12 through the third bearing 411, and the other end is connected to the output seat 16 through the fourth bearing 412; the output shaft 52 is in transmission connection with the transmission assembly 40, and the outer side of the output shaft 52 is sleeved with a fifth bearing 511 and a sixth bearing 512 and is connected to the output seat 16 through the fifth bearing 511 and the sixth bearing 512.

[0061] Further, a support structure is connected to the side of the main box body 10 where the transmission cavity 18 is formed, and one end of the output shaft 52 connected to the transmission input shaft 3231 is supported by the support structure. In this way, the support structure can be used to support the output shaft 52 and the transmission input shaft 3231.

[0062] One side of the drive cavity 13 away from the transmission cavity 18 has an opening, and the opening is fitted with an end cover 112. The open end of the transmission cavity 18 away from the drive cavity 13 is fitted with an output seat 16. Since the installation of each bearing requires the construction of a bearing chamber to limit the bearing, the setting of the above six bearings requires the construction of multiple bearing chambers, which makes the forming of the main housing 10 difficult and the processing technology very difficult. Therefore, by providing an output seat 16 detachably connected to the main housing 10, the fourth bearing 412, the fifth bearing 511 and the sixth bearing 512 are all limited on the output seat 16. Therefore, the output seat 16 undertakes the construction of at least three bearing chambers. And because it is detachably connected to the main housing 10, the two can be processed separately, greatly reducing the process difficulty, simplifying the internal structure and installation process of the main housing 10, and reducing the manufacturing and maintenance costs, and improving the maintainability.

[0063] Please refer to Figure 8 , Figure 10 and Figure 12 , the output seat 16 includes a first seat body 161 and a second seat body 162. The first seat body 161 is connected to the main housing 10. The second seat body 162 includes a connecting section 1621 and a supporting section 1622. The connecting section 1621 is connected to the first seat body 161. The supporting section 1622 is connected to one end of the connecting section 1621 away from the first seat body 161 and forms an angular structure. Preferably, the supporting section 1622 is arranged parallel to the first seat body 161. The third bearing 411 group is supported on both the first seat body 161 and the second seat body 162. In this way, the third bearing 411 group includes at least two bearings, and the two bearings are respectively connected to the spaced-apart first seat body 161 and second seat body 162, and the stress is more evenly distributed, and the structural strength of the output seat 16 arranged in this way is also higher.

[0064] The second seat body 162 protrudes towards the drive cavity 13 and the second seat body 162 constitutes a supporting structure. One end of the output shaft 52 connected to the transmission input shaft 3231 is supported on the supporting structure.

[0065] An accommodation cavity is formed between the first seat body 161 and the second seat body 162. The accommodation cavity is communicated with the transmission cavity 18 and is used for accommodating at least part of the structure in the transmission assembly 40. Specifically, in one embodiment, at least part of the output gear 54 in the transmission assembly 40 is located in the accommodation cavity. In another embodiment, at least part of the second transmission gear 45 in the transmission assembly is located in the accommodation cavity. In other embodiments, both the output gear 54 and the second transmission gear 45 in the transmission assembly are located in the accommodation cavity. In this way, the structure of the traction machine 100 is more compact, which helps to realize the miniaturization of the traction machine 100.

[0066] Specifically, multiple reinforcing ribs are provided on the first housing body 161 and / or the second housing body 162. At least multiple reinforcing ribs extend radially outward, and at least multiple reinforcing ribs extend circumferentially. The multiple reinforcing ribs intersect vertically and horizontally to form a reinforcing structure that improves the structural strength of the output housing 16.

[0067] In this embodiment, the third bearing set 411 includes a fifth bearing 511 and a sixth bearing 512. The fifth bearing 511 is connected to the second housing body 162, and the sixth bearing 512 is connected to the first housing body 161. Preferably, in this embodiment, the fifth bearing 511 and the sixth bearing 512 are provided as tapered roller bearings.

[0068] A flange 1611 is provided on the outer peripheral side of the first housing body 161. The flange 1611 extends along the radially outer side away from the first housing body 161, and the flange 1611 is connected to the support housing 12. Thus, the flange 1611 increases the connection area between the first housing body 161 and the support housing 12, and therefore improves the connection strength between the two.

[0069] Preferably, in this embodiment, multiple screw holes are formed in the flange 1611, and multiple bolts pass through the screw holes and extend into the support housing 12. Therefore, the setting of the flange 1611 also facilitates the formation of the screw holes and the connection of the bolts.

[0070] Further, a first output hole 1612 is formed in the first housing body 161, and a second output hole 1623 is formed in the second housing body 162. The first output hole 1612 and the second output hole 1623 are coaxially arranged. The third bearing set 411 includes a fifth bearing 511 and a sixth bearing 512. The fifth bearing 511 is connected to the inner wall of the second output hole 1623, and the sixth bearing 512 is connected to the inner wall of the first output hole 1612. Thus, both the fifth bearing 511 and the sixth bearing 512 are connected to the output housing 16. The setting of the output housing 16 enables two bearing chambers to be constructed less on the main housing body 10, thereby reducing the processing difficulty of the main housing body 10. And since the output assembly 50 is connected to the third bearing set 411, that is, the fifth bearing 511 and the sixth bearing 512 are sleeved on the outer peripheral side of the output assembly 50, the stress sharing of the two bearings can make the connection between the output assembly 50 and the output housing 16 more stable.

[0071] The output component 50 further includes a first limiting seat 53. The output shaft 52 is disposed through the fifth bearing 511 and the sixth bearing 512. A first output step 521 protrudes from the outer peripheral side of the output shaft 52, and a second output step 1624 protrudes from the inner wall of the second output hole 1623. Along the axial direction of the output shaft 52, one side of the fifth bearing 511 abuts against the first output step 521, and the other side abuts against the second output step 1624. The first limiting seat 53 is sleeved on the outer peripheral side of the output shaft 52 and abuts against the side of the sixth bearing 512 away from the fifth bearing 511. Thus, the first output step 521 and the second output step 1624 respectively abut against both sides of the fifth bearing 511 along the axial direction of the output shaft 52, so that the position of the fifth bearing 511 in the axial direction can be ensured to be stable. The radially inner side of the fifth bearing 511 is sleeved on the outer peripheral side of the output shaft 52, and the radially outer side of the fifth bearing 511 abuts against the second seat body 162, so the fifth bearing 511 is firmly limited.

[0072] Meanwhile, when the first output step 521 is formed on the outer side of the output shaft 52, a third output step 522 is further formed on the other side in the axial direction. The side of the sixth bearing 512 close to the fifth bearing 511 abuts against the third output step 522. The first limiting seat 53 also abuts against the end surface of the side of the sixth bearing 512 away from the third output step 522, thus completing the limitation of the sixth bearing 512.

[0073] Furthermore, please refer to Figure 1 、 Figure 8 、 Figure 10 and Figure 11 The first limiting seat 53 includes a first fitting section 531 and a first limiting section 532. The first fitting section 531 and the first limiting section 532 are connected. Along the axial direction of the output shaft 52, the first fitting section 531 is located outside the first output hole 1612 and is connected to the first seat body 161. At least part of the first limiting section 532 extends into the first output hole 1612 and abuts against the sixth bearing 512. After the first limiting section 532 extends into the first output hole 1612, it is located between the outer side of the output shaft 52 and the inner wall of the first output hole 1612, and has a clearance fit with the outer wall of the output shaft 52 to prevent interference.

[0074] Specifically, in this embodiment, the first fitting section 531 extends along the radially outward direction like the above-mentioned flanging 1611, so as to improve the connection strength with the second seat body 162.

[0075] A transmission hole 1625 is formed in the second body 162. A transmission groove 121 is formed on one side of the transmission cavity 18 close to the driving cavity 13. The transmission groove 121 is arranged as a circular groove and is coaxially arranged with the transmission hole 1625. The transmission assembly 40 includes a transmission shaft 42. The third bearing 411 and the fourth bearing 412 are sleeved at both ends of the transmission shaft 42. The third bearing 411 is connected to the groove wall of the transmission groove 121, and the fourth bearing 412 is connected to the inner wall of the transmission hole 1625. In this way, the transmission shaft 42 realizes stable transmission through the two end bearings, and at the same time, the fourth bearing 412 is installed on the second body 162, that is, the bearing chamber required for the fourth bearing 412 is formed on the output seat 16, and the output seat 16 reduces one more bearing chamber that originally needed to be constructed on the main box body 10.

[0076] It should be noted that the bearing chamber described in this application refers to at least two steps that abut against the axial ends of the bearing, and there needs to be a groove between the two steps to accommodate the bearing. In the prior art, the bearing chamber with the above structure is usually directly machined from the main box body 10.

[0077] Furthermore, a second transmission step 122 is formed on the groove wall of the transmission groove 121, and a first transmission step 421 protrudes from the transmission shaft 42. Along the axial direction of the transmission shaft 42, one end of the third bearing 411 abuts against the second transmission step 122, and the other end abuts against the first transmission step 421. The transmission assembly 40 further includes a second limiting seat 43. The second limiting seat 43 includes a second matching section 431 and a second limiting section 432. The second matching section 431 and the second limiting section 432 are connected. Along the axial direction of the transmission shaft 42, the second matching section 431 is located outside the transmission hole 1625 and is connected to the first body 161, and the second limiting section 432 extends into the transmission hole 1625 and abuts against the fourth bearing 412. In this way, the first transmission step 421 and the second transmission step 122 abut against both sides of the third bearing 411 in the axial direction, that is, the stable limit of the third bearing 411 is realized, and the second limiting section 432 has a similar technical effect as the first limiting section 532 above, and also abuts against one side of the fourth bearing 412 in the axial direction.

[0078] In addition, along the vertical direction, the transmission shaft 42 is arranged below the output shaft 52, and the second body 162 extends above the transmission shaft 42, forming an upper and lower spaced arrangement with the transmission shaft 42, and forming a horizontal spaced arrangement with the first transmission gear 44 and the second transmission gear 45. That is to say, the axes of the transmission shaft 42 and the output shaft 52 are parallelly arranged, but they are staggered and spaced in the vertical direction, and the second body 162 avoids the transmission assembly 40 to reduce interference and ensure the normal operation of each component.

[0079] The end cover 112 is connected to one end of the drive seat 11 away from the support seat 12. A first input hole 1121 is provided on the end cover 112. A second input hole 1111 is provided on the side of the drive cavity 13 away from the end cover 112. The first input hole 1121 and the second input hole 1111 are coaxially arranged; the second bearing 312 is connected to the first input hole 1121, and the first bearing 311 is connected to the second input hole 1111. In this way, the stable operation of the input shaft is ensured. Specifically, in this embodiment, both the first bearing 311 and the second bearing 312 are provided as deep groove ball bearings.

[0080] The braking assembly 20 includes a brake bracket 21. The brake bracket 21 is spaced from the main housing 10 to form an accommodating space. The traction wheel 60 of the traction machine 100 is located in the accommodating space. An installation seat 15 is provided on the side of the main housing 10 facing the brake bracket 21. The installation seat 15 abuts against the brake bracket 21, and a connecting member 24 is provided between the brake bracket 21 and the main housing 10. One end of the connecting member 24 is connected to the main housing 10, and the other end is connected to the brake bracket 21; one end of the output assembly 50 is rotatably connected to the main housing 10, and the other end is rotatably connected to the brake bracket 21; the traction wheel 60 is connected to the output assembly 50 and is located between the main housing 10 and the brake bracket 21. In this way, both ends of the output shaft are respectively supported on the main housing 10 and the brake bracket 21. Therefore, the stress load received on the output shaft can be distributed to the brake bracket 21 and the main housing 10, thus improving the overall structural strength of the traction machine 100. Moreover, the connection of the connecting member 24 forms an overall frame structure between the brake bracket 21 and the main housing 10, and there are multiple stress conduction and distribution paths to further improve the overall load capacity of the traction machine 100. The installation seat 15 abuts against the brake bracket 21. In this way, the mutual support effect and structural strength between the brake bracket 21 and the main housing 10 can be further improved.

[0081] Specifically, a plurality of screw holes are provided on the installation seat 15, and a plurality of bolts are inserted into the brake bracket 21 and are in one-to-one correspondence with the screw holes and are inserted and matched. In this way, it is convenient to connect the main housing 10 and the brake bracket 21 together. The cooperation of the bolts and the screw holes can play a matching effect on the main housing 10 and the brake bracket 21 and make the two brackets closer.

[0082] In this embodiment, the installation seat 15 is integrally formed with the main housing 10, and the bolts are connected to the brake bracket 21. In other embodiments, the positions of the installation seat 15 and the bolts can also be interchanged without affecting their connection.

[0083] Specifically, the connecting members 24 are provided with at least two, and the two connecting members 24 are arranged in parallel and are respectively connected to the lateral sides of the brake bracket 21. The two connecting members 24 located on both sides of the brake bracket 21 contribute to the stress conduction between both sides of the brake bracket 21 and both sides of the main housing 10, further improving the structural strength of the brake bracket 21 and the main housing 10 compared with the solution of one connecting member 24, and making the overall structural load-bearing more balanced and reducing stress offset.

[0084] Exemplarily, the connecting member 24 is arranged in a cylindrical structure, which is convenient for processing, has high structural strength, and is convenient for assembly.

[0085] It can be understood that in other embodiments, the number of connecting members 24 can also be increased to 2, 3, 4, etc., and is not limited to the embodiment of the two connecting members 24 described above. Multiple connecting members 24 can all be arranged on the tops of the brake bracket 21 and the main housing 10, or the connection positions of the multiple connecting members 24 to the brake bracket 21 and the main housing 10 can be adjusted to the lateral sides. Preferably, the multiple connecting members 24 are all arranged in parallel, so as to make the force more balanced.

[0086] Further, first connection lugs 211 are respectively arranged on the lateral sides of the brake bracket 21, and first connection holes 2111 are formed in the first connection lugs 211; second connection lugs 14 are respectively arranged on the lateral sides of the main housing 10, and second connection holes are formed in the second connection lugs 14; one end of the connecting member 24 passes through the first connection hole 2111, and the other end passes through the second connection hole. In this way, the arrangement of the first connection lugs 211 and the second connection lugs 14 facilitates the assembly of the connecting member 24, and enables the first connection holes 2111 and the second connection holes not to be formed on the brake bracket 21 and the main housing 10, so that the influence of the opening structure on the structural strength of the brake bracket 21 and the main housing 10 can be avoided.

[0087] A traction rope is wound around the traction wheel 60, and the traction rope is used to connect to the elevator car. As the traction wheel 60 rotates, the traction rope can drive the elevator car to rise or fall. Please refer to Figure 11 , in order to prevent the traction rope from falling off the traction wheel 60, a rope retaining rod 23 is sleeved on the connecting member 24. The rope retaining rod 23 includes a mounting section 231 and an extension section. One end of the mounting section 231 is connected to the connecting member 24, and the other end is connected to the extension section. The extension section is arranged at an angle with the mounting section 231 and extends along the axial direction of the traction wheel 60. In this way, the mounting section 231 is used to connect to the connecting member 24, and the extension section extends along the axial direction of the traction wheel 60, so it is located on the radially outer side of the traction rope and can prevent the traction rope from falling off in the radially outer direction.

[0088] One end of the installation section 231 away from the connecting member 24 is provided with a rope blocking section 232, and the rope blocking section 232 can prevent the traction rope from falling off.

[0089] Specifically, in this embodiment, the installation section 231 and the extension section are perpendicularly arranged, that is, the installation section 231 extends along a direction perpendicular to the axial direction of the traction wheel 60, while the extension section is parallel to the axis of the traction wheel 60.

[0090] Preferably, rope blocking rods 23 are provided on both connecting members 24 to improve the rope blocking effect on the traction rope.

[0091] Furthermore, installation holes 2311 are formed in the installation section 231, the connecting member 24 passes through the installation holes 2311, abuts against the side of the installation section 231 facing away from the main box body 10, and presses the installation section 231 against the main box body 10. In this way, the installation holes 2311 enable the installation section 231 to be sleeved outside the connecting member 24, thereby preventing the rope blocking rod 23 from falling off the connecting member 24.

[0092] In this embodiment, nuts are provided on the second connection ears 14, the nuts are coaxially arranged with the second connection holes, the connecting member 24 passes through the nuts and extends into the second connection holes, and the connecting member 24 is in threaded cooperation with both the nuts and the second connection holes. At the other end of the connecting member 24, it is also in threaded cooperation with the first connection holes 2111 on the first connection ears 211, or passes through the first connection holes 2111 and a nut is sleeved on the other end of the connecting member 24 to fix the connecting member 24.

[0093] Further, along the vertical direction, the connecting member 24 is arranged on one side of the main box body 10 and the brake bracket 21, and the mounting seat 15 and the bolts are arranged on the other side of the main box body 10 and the brake bracket 21. In this way, the connecting member 24 can play a reinforcing role on one side, while the mounting seat 15 and the bolts can play a reinforcing role on the other side. Therefore, the above structure can improve the structural strength of the traction machine 100 in multiple directions.

[0094] The traction machine 100 further includes a brake 22 and a plurality of fixing members 221. A plurality of first fixing holes 222 are formed in the brake 22, and a plurality of second fixing holes 213 are formed in the brake bracket 21. Each first fixing hole 222 is coaxially arranged with a corresponding second fixing hole 213, and the plurality of fixing members 221 respectively pass through the corresponding first fixing holes 222 and second fixing holes 213. In this way, the connection strength between the brake 22 and the brake bracket 21 is high.

[0095] The brake 22 includes a moving plate 223 and a static plate 224. The interior of the static plate 224 contains an electromagnetic coil and a spring group and always remains fixed in position. When the traction machine 100 rotates, the moving plate 223 will be attracted to the static plate 224, thereby relaxing the brake disc inside the brake 22 and enabling the output assembly 50 to operate normally. When the traction machine 100 needs to be braked, the coil inside the static plate 224 will be powered off and lose magnetism. At this time, the moving plate 223 will be pushed forward by the spring group inside the static plate 224 and press against the brake disc, thereby realizing the braking action.

[0096] The present invention also provides an assembly method for the traction machine 100, including the above-mentioned traction machine 100. The assembly method includes: connecting the output assembly 50 to the output seat 16; connecting the output seat 16 to the support seat 12. First, connect the output assembly 50 to the output seat 16, and then install them together as a whole into the main housing 10, which greatly simplifies the assembly process. The output assembly 50 and the output seat 16 can be assembled separately with lower difficulty.

[0097] Further, after the output assembly 50 and the output seat 16 are installed, the assembly method further includes: inserting bolts into the mounting seat 15; connecting both ends of the connecting member 24 to the support seat 12 and the brake assembly 20 respectively.

[0098] In this way, the matching of the bolts with the mounting seat 15 pre-positions the brake assembly 20 and the main housing 10, and then the brake bracket 21 and the main housing 10 are connected by the connecting member 24 to make the assembly of the two more compact.

[0099] The overall assembly process of the traction machine 100 is as follows: First, install the stator 33 into the main housing 10, then assemble the rotor 34, and then install the end cover 112 and fasten it with screws. Then place the main housing 10 vertically with its drive seat 11 facing downwards and install the drive assembly 30 and the sealing ring onto the main housing 10. Then insert the output shaft into the output seat 16, and it is necessary to ensure that the positioning bearing 524 at the end of the drive shaft 32 is accurately installed inside the output shaft 52. Then install an O-ring outside the output seat 16, and install the assembly of the output shaft 52 and the output seat 16 together into the main housing as shown in the figure, and then install the first limiting member and the second limiting member and install the sealing ring. Then install the traction wheel 60 onto the output shaft 52, and then install the fifth bearing 511 and the sixth bearing 512 onto the output shaft 52. Then install the connecting member 24 onto the main housing 10. Adjust the positions of the two connecting members 24, then install the brake bracket 21, and connect it to the bottom of the main housing 10 with fastening screws, and then adjust the two connecting members 24 to connect the brake bracket 21 to the top of the main housing 10.

[0100] Compared with the prior art, in the present invention, through the drive shaft 32 and the output shaft 52 with a shaft nested in another shaft, a part of the drive shaft 32 extends into the interior of the output shaft 52, and the positioning bearing 524 for fixing the drive shaft 32 is also arranged inside the output shaft 52. This not only reduces the axial space occupied by the drive shaft 32 and the output shaft 52, but also enables the main housing 10 to reduce the machining of a bearing chamber, simultaneously achieving the miniaturization of the traction machine 100 and the convenience of machining. By providing an output seat 16 detachably connected to the main housing 10, the fourth bearing 412 and the third bearing 411 group are both limited on the output seat 16. Therefore, the output seat 16 undertakes the structure of at least three bearing chambers. Moreover, because it is detachably connected to the main housing 10, the two can be machined separately without being integrally cast, greatly reducing the process difficulty, simplifying the internal structure and installation process of the main housing 10, and reducing the manufacturing and maintenance costs, improving the maintainability.

[0101] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described 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 described in this specification.

[0102] The above-described embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A traction machine, characterized in that, Comprising: A main housing (10); A drive shaft (32) mounted on the main housing (10), A transmission assembly (40) mounted on the main housing (10) and drivingly connected to the drive shaft (32); An output shaft (52), one end of the output shaft (52) being drivingly connected to the transmission assembly (40), and the other end of the output shaft (52) constituting an output end; A braking assembly (20) connected to the main housing (10) and capable of braking the output end; Wherein, the drive shaft (32) and the output shaft (52) are coaxially arranged, and along the radial direction of the drive shaft (32), the orthographic projection of the drive shaft (32) at least partially overlaps with the orthographic projection of the output shaft (52).

2. The traction machine according to claim 1, characterized in that, One of the output shaft (52) and the drive shaft (32) is provided with a positioning groove (523), and the end of the other one extends into the positioning groove (523) and is rotatably connected to the positioning groove (523).

3. The traction machine according to claim 1, wherein The main housing (10) is integrally formed with a drive cavity (13) and a transmission cavity (18); A part of the drive shaft (32) is received in the drive cavity (13), and another part of the drive shaft (32) passes through the drive cavity (13) and extends to the transmission cavity (18) to form a transmission input shaft (3231), the transmission input shaft (3231) cooperates with the transmission assembly (40), and the transmission assembly (40) is received in the transmission cavity (18); at least a part of the output shaft (52) is located in the transmission cavity (18) and is rotatably engaged with the transmission input shaft (3231).

4. The traction machine according to claim 3, characterized in that, A support structure is connected to the side of the main housing (10) forming the transmission cavity (18), and one end of the output shaft (52) connected to the transmission input shaft (3231) is supported by the support structure.

5. The traction machine according to claim 4, characterized in that, The side of the drive cavity (13) away from the transmission cavity (18) has an opening, and the opening is fitted with an end cover (112), and the open end of the side of the transmission cavity (18) away from the drive cavity (13) is fitted with an output seat (16); The output seat (16) includes a first seat body (161) and a second seat body (162), the first seat body (161) is connected to the main housing (10), the second seat body (162) protrudes towards the drive cavity (13) and the second seat body (162) constitutes the support structure, and a receiving cavity is formed between the second seat body (162) and the first seat body (161), the receiving cavity is communicated with the transmission cavity (18) and is used for receiving at least a part of the structure of the transmission assembly (40).

6. The traction machine according to claim 5, characterized in that, The transmission assembly (40) includes an input gear (325), a first transmission gear (44), a transmission shaft (42), a second transmission gear (45), and an output gear (54). The first transmission gear (44) and the second transmission gear (45) are both connected to the outer peripheral side of the transmission shaft (42) and are coaxially arranged with the transmission shaft (42). The input gear (325) is arranged on the transmission input shaft (3231). The first transmission gear (44) is in transmission connection with the input gear (325). The output gear (54) is arranged on the output shaft (52). The second transmission gear (45) is in transmission connection with the output gear (54); The output shaft (52) and the transmission shaft (42) are arranged parallel to each other vertically, and at least part of the output gear (54) and / or the second transmission gear (45) is located in the accommodation cavity.

7. The traction machine according to claim 5, characterized in that, The main housing (10) includes a driving seat (11) and a supporting seat (12) formed integrally. A driving cavity (13) is formed in the driving seat (11), and a transmission cavity (18) is formed in the supporting seat (12). A bearing seat (19) is provided between the driving cavity (13) and the transmission cavity (18). The driving cavity (13) and the transmission cavity (18) are separated into two chambers by the bearing seat (19). A communication hole is provided in the bearing seat (19) to communicate the driving cavity (13) and the transmission cavity (18); Both ends of the driving shaft (32) are rotatably connected to the end cover (112) and the bearing seat (19) respectively through a first bearing set (31). One end of the transmission input shaft (3231) far from the driving shaft (32) is rotatably connected to the output shaft (52) through a positioning bearing (524). Both ends of the output shaft (52) are rotatably connected to the output seat (16) and the braking assembly (20) respectively through a third bearing set (51).

8. The traction machine according to claim 1, characterized in that, The braking assembly (20) includes a brake bracket (21). The brake bracket (21) is spaced from the main housing (10) to form an accommodation space. The traction wheel (60) of the traction machine is located in the accommodation space. An installation seat (15) is provided on one side of the main housing (10) facing the brake bracket (21). The installation seat (15) abuts against the brake bracket (21). A connecting member (24) is provided between the brake bracket (21) and the main housing (10). One end of the connecting member (24) is connected to the main housing (10), and the other end passes through the accommodation space and is connected to the brake bracket (21).

9. An assembly method applicable to the assembly of a traction machine as described in any one of claims 1 to 8, characterized in that, The main housing (10) includes a driving seat (11) and a supporting seat (12) integrally provided, and an output seat (16) detachably connected to the supporting seat (12). The method includes: Connecting the output shaft (52) to the output seat (16); Connecting the output seat (16) to the supporting seat (12).

10. The assembly method according to claim 9, characterized in that, The traction machine further includes a connecting member (24). An installation seat (15) is provided on one side of the support seat (12) facing the braking assembly (20). A bolt is provided on one side of the braking assembly (20) facing the support seat (12). The assembly method includes: Inserting the bolt into the installation seat (15); Connecting the two ends of the connecting member (24) to the support seat (12) and the braking assembly (20) respectively.

Images