Permanent magnet synchronous traction machine

Abstract

The application discloses a permanent magnet synchronous traction machine, which is characterized in that the traction wheel and the brake wheel are connected to the main shaft, and the traction wheel, the brake wheel and the main shaft are synchronously rotated, so that the stable torque transmission between the brake wheel and the traction wheel is realized through the main shaft, and the stable start-stop operation of the traction wheel is realized. Since the traction wheel and the brake wheel are located on opposite sides of the machine base, the oil stains on the steel wire rope are effectively prevented from flowing or being thrown onto the brake surface due to the close proximity of the brake wheel to the traction wheel. Since the brake wheel is located in the accommodating groove, and the brake surface on the brake wheel is arranged towards the side wall of the accommodating groove, the brake surface is covered by the machine base, and the protection performance of the brake surface is greatly improved. Meanwhile, when the permanent magnet synchronous traction machine leaks oil, the oil stains on the bearing only flow out to the side surface of the machine base away from the brake wheel, so that the oil of the bearing is effectively prevented from flowing onto the brake surface under the condition of oil leakage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of traction machines, in particular to a permanent magnet synchronous traction machine. BACKGROUND

[0002] The permanent magnet synchronous traction machine, also known as a gearless drive, is used to be installed in the elevator machine room or the elevator shaft, generally above the top floor of the building or inside the shaft, and is the power device of the elevator. The permanent magnet synchronous traction machine is directly driven by the main machine to drive the rope wheel without a gear box device. With the rapid development of the elevator market, the application amount of the permanent magnet synchronous traction machine is increasing, accounting for more than 70% of all elevator traction machines. At present, most of the traction machines in the industry have deficiencies in the design of oil leakage prevention structure and the matching of structure, and there are risks of oil leakage or pollution by oil flowing or being thrown out by the steel wire rope, so it is difficult to ensure that the brake surface of the traction machine is free of oil stains. Once the brake surface has oil stains, it will lead to insufficient brake torque, thereby causing serious safety hazards. SUMMARY

[0003] Therefore, it is necessary to provide a permanent magnet synchronous traction machine which can effectively prevent oil stains from entering the brake surface and ensure stable output of brake torque.

[0004] The technical scheme is as follows:

[0005] A permanent magnet synchronous traction machine comprises a machine base, a traction wheel and a brake wheel, the traction wheel and the brake wheel are respectively located on opposite sides of the machine base, a containing groove is arranged on the side of the machine base facing the brake wheel, the brake wheel is located in the containing groove, a brake surface is arranged on the brake wheel, and the brake surface is arranged towards the side wall of the containing groove; and a main shaft which is rotatably arranged through the machine base, the brake wheel and the traction wheel are connected to the main shaft and synchronously rotate through the main shaft.

[0006] The permanent magnet synchronous traction machine described above connects the traction wheel and the brake wheel on the main shaft, and synchronously rotates the traction wheel, the brake wheel and the main shaft. In this way, the main shaft enables stable torque transmission between the brake wheel and the traction wheel, and realizes stable start and stop operation of the traction wheel. Since the traction wheel and the brake wheel are located on opposite sides of the machine base, the traction wheel and the brake wheel of the present scheme are completely separated by the machine base, effectively preventing oil stains on the steel wire rope from flowing or being thrown onto the brake surface due to the proximity of the brake wheel to the traction wheel. Since the brake wheel is located in the accommodating groove, and the brake surface on the brake wheel is arranged towards the side wall of the accommodating groove, the brake surface is covered by the machine base, greatly improving the protection performance of the brake surface, making it more difficult for oil stains on the steel wire rope to flow or be thrown onto the brake surface. At the same time, when the permanent magnet synchronous traction machine leaks oil, the oil in the bearing chamber will only flow out to the side surface of the machine base opposite to the brake wheel, effectively preventing the oil in the bearing chamber from flowing onto the brake surface in the case of leakage, greatly improving the ability of the brake surface to prevent oil pollution, ensuring stable output of the brake torque, thereby improving the stability and safety of the permanent magnet synchronous traction machine.

[0007] The principles and effects of the present application will be further described in combination with the above-mentioned scheme:

[0008] In one of the embodiments, the brake wheel is provided with a first shaft sleeve, and the traction wheel is provided with a second shaft sleeve, and the first shaft sleeve and the second shaft sleeve are sleeved on the main shaft and are synchronously connected with the main shaft.

[0009] In one of the embodiments, the first shaft sleeve and / or the second shaft sleeve is connected with the main shaft by a key connection mode.

[0010] In one of the embodiments, the first shaft sleeve and / or the second shaft sleeve is connected with the main shaft by an expansion connection sleeve.

[0011] In one of the embodiments, the first shaft sleeve and / or the second shaft sleeve is connected with the main shaft by an end cover.

[0012] In one of the embodiments, the permanent magnet synchronous traction machine further comprises a first sealing cover, the first sealing cover is sleeved on the first shaft sleeve, and the first sealing cover is connected to the machine base.

[0013] In one of the embodiments, the permanent magnet synchronous traction machine further comprises a first sealing member, the first sealing member is arranged between the first sealing cover and the first shaft sleeve.

[0014] In one of the embodiments, the brake wheel and / or the first shaft sleeve is provided with an oil separation groove on the side surface towards the accommodating groove, and the oil separation groove is used to block the flow of oil.

[0015] In one of the embodiments, the permanent magnet synchronous traction machine further comprises a second cover and a second sealing element, the second cover is sleeved on the second shaft sleeve, and the second cover is connected to the machine base, and the second sealing element is arranged between the second cover and the second shaft sleeve.

[0016] In one of the embodiments, the permanent magnet synchronous traction machine further comprises a winding coil, the winding coil is arranged in the accommodating groove, and the winding coil is sleeved in the brake wheel.

[0017] In one of the embodiments, a support is arranged on the bottom wall of the accommodating groove, the support is arranged around the circumference of the main shaft, and the winding coil is sleeved on the support.

[0018] In one of the embodiments, the permanent magnet synchronous traction machine further comprises a bearing, a third shaft sleeve is arranged on the machine base, the bearing is arranged in the third shaft sleeve, and the main shaft is arranged on the bearing.

[0019] In one of the embodiments, the permanent magnet synchronous traction machine further comprises a brake, the brake is arranged on the machine base, and the brake is in braking cooperation with the braking surface.

[0020] In one of the embodiments, the permanent magnet synchronous traction machine further comprises a rope blocking element, the rope blocking element is arranged on the machine base, and the rope blocking element is used to prevent the steel wire rope on the traction wheel from jumping off. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structure schematic view of the permanent magnet synchronous traction machine according to one of the embodiments of the present application;

[0022] Figure 2 A structure sectional view of the permanent magnet synchronous traction machine according to one of the embodiments of the present application;

[0023] Figure 3 A synchronous rotation connection schematic view of the main shaft, the first shaft sleeve and the second shaft sleeve according to one of the embodiments of the present application;

[0024] Figure 4 A synchronous rotation connection schematic view of the main shaft, the first shaft sleeve and the second shaft sleeve according to another embodiment of the present application;

[0025] Figure 5 A synchronous rotation connection schematic view of the main shaft, the first shaft sleeve and the second shaft sleeve according to still another embodiment of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 100, permanent magnet synchronous traction machine, 110, machine base, 111, third shaft sleeve, 1111, mounting groove, 112, containing groove, 113, support, 114, motor junction box, 115, brake junction box, 116, rope blocking piece, 117, brake, 120, traction wheel, 121, second shaft sleeve, 122, second cover, 123, second sealing piece, 130, brake wheel, 131, brake surface, 132, first shaft sleeve, 133, connecting part, 134, first cover, 135, first sealing piece, 136, oil separation groove, 140, main shaft, 141, limiting protrusion, 142, third cover, 150, bearing, 160, winding coil, 170, encoder, 180, turning gear, 190, key, 191, key groove, 192, expansion connection sleeve, 193, end cover. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0029] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] The "first", "second" in the present application do not represent the specific number and order, but are only used for the name distinction.

[0032] In one embodiment, please refer to Figure 1 With Figure 2The permanent magnet synchronous traction machine 100 comprises a base 110, a traction wheel 120, a brake wheel 130 and a main shaft 140. The traction wheel 120 and the brake wheel 130 are respectively located on opposite sides of the base 110. The base 110 is provided with a containing groove 112 on a side facing the brake wheel 130. The brake wheel 130 is located in the containing groove 112, and the brake wheel 130 is provided with a brake surface 131. The brake surface 131 is arranged towards the side wall of the containing groove 112. The main shaft 140 is rotatably arranged through the base 110. The brake wheel 130 and the traction wheel 120 are both connected to the main shaft 140 and synchronously rotate through the main shaft 140.

[0033] The permanent magnet synchronous traction machine 100 synchronously rotates the traction wheel 120, the brake wheel 130 and the main shaft 140, so that the brake wheel 130 and the traction wheel 120 are stably torque-driven through the main shaft 140, and the traction wheel 120 is stably started and stopped. Since the traction wheel 120 and the brake wheel 130 are respectively located on opposite sides of the base 110, the traction wheel 120 and the brake wheel 130 of the embodiment are completely separated through the base 110, effectively avoiding that the oil stain on the steel wire rope easily flows or is thrown onto the brake surface 131 due to the close proximity of the brake wheel 130 to the traction wheel 120. Since the brake wheel 130 is located in the containing groove 112, and the brake surface 131 on the brake wheel 130 is arranged towards the side wall of the containing groove 112, the brake surface 131 is covered by the base 110, greatly improving the protection performance of the brake surface 131, so that the oil stain on the steel wire rope cannot flow or be thrown onto the brake surface 131. Meanwhile, when the permanent magnet synchronous traction machine 100 leaks oil, the oil stain on the bearing 150 only flows out to the side of the base 110 away from the brake wheel 130, effectively preventing the oil on the bearing 150 from flowing onto the brake surface 131 under the condition of oil leakage, greatly improving the cleanliness of the brake surface 131, ensuring the stable output of the braking torque, and thus being conducive to improving the stability and safety of the permanent magnet synchronous traction machine 100. In addition, the embodiment ingeniously solves the problem of oil entering the brake surface 131 by changing the structural relationship among the base 110, the traction wheel 120 and the brake wheel 130, maintains the simple structure and easy implementation of the permanent magnet synchronous traction machine 100, and does not need to additionally machine the permanent magnet synchronous traction machine 100, so as to increase the complexity of the traction machine and make it difficult to manufacture the traction machine.

[0034] It should be noted that, referring to Figure 2 The side wall and the bottom wall of the containing groove 112 should be understood as follows: the bottom wall of the containing groove 112 is the part opposite to the opening end of the containing groove 112; and the side wall of the containing groove 112 is the part between the bottom wall of the containing groove 112 and the opening end of the containing groove 112.

[0035] Further, referring toFigure 2 The first shaft sleeve 132 is arranged on the brake wheel 130. The second shaft sleeve 121 is arranged on the traction wheel 120. The first shaft sleeve 132 and the second shaft sleeve 121 are sleeved on the main shaft 140 and are synchronously connected with the main shaft 140. In this way, the brake wheel 130 and the traction wheel 120 are conveniently installed on the main shaft 140 through the first shaft sleeve 132 and the second shaft sleeve 121. Meanwhile, the brake wheel 130 and the traction wheel 120 are conveniently synchronously rotated with the main shaft 140.

[0036] Optionally, the synchronous rotation connection between the first shaft sleeve 132 and the main shaft 140 is key connection, expansion connection, end cover connection, clamping connection or other connection modes; the synchronous rotation connection between the second shaft sleeve 121 and the main shaft 140 is key connection, expansion connection, end cover connection, clamping connection or other connection modes.

[0037] Specifically, please refer to Figure 3 When the first shaft sleeve 132 and the second shaft sleeve 121 are connected with the main shaft 140 through the key 190, the main shaft 140 is provided with the key 190, and the first shaft sleeve 132 and the second shaft sleeve 121 are both provided with the key groove 191; please refer to Figure 4 When the first shaft sleeve 132 and the second shaft sleeve 121 are connected with the main shaft 140 through the expansion connection sleeve 192, the two expansion connection sleeves 192 are separately sleeved on the main shaft 140, and the first shaft sleeve 132 and the second shaft sleeve 121 are separately sleeved on the two expansion connection sleeves 192; please refer to Figure 5 When the first shaft sleeve 132 and the second shaft sleeve 121 are connected with the main shaft 140 through the end cover 193, one of the end covers 193 is connected with the first shaft sleeve 132 and the main shaft 140 through bolts or screws, and the other end cover 193 is connected with the second shaft sleeve 121 and the main shaft 140 through bolts or screws.

[0038] In an embodiment, please refer to Figure 2 The permanent magnet synchronous traction machine 100 further comprises a first cover 134. The first cover 134 is sleeved on the first shaft sleeve 132, and the first cover 134 is connected with the machine base 110 and is limited with the bearing 150, so that the bearing 150 can only rotate and cannot move along the axial direction, thereby greatly improving the stability of the main shaft 140 on the machine base 110. In this embodiment, the first cover 134 is connected with the machine base 110 through bolts or screws.

[0039] Further, please refer to Figure 2The permanent magnet synchronous traction machine 100 further comprises a first sealing member 135. The first sealing member 135 is arranged between the first cover 134 and the first shaft sleeve 132. In this way, the first sealing member 135 is arranged between the first cover 134 and the first shaft sleeve 132 to fill the gap between the first cover 134 and the first shaft sleeve 132, so that the sealing performance between the first cover 134 and the first shaft sleeve 132 is improved, further preventing the lubricating oil from flowing along the inner cavity surface of the brake wheel 130 into the air gap between the stator and the rotor, thereby affecting the performance of the permanent magnet synchronous traction machine 100. The first sealing member 135 can be a sealing device such as felt, a rotating lip seal, an O-shaped seal, etc.

[0040] In one embodiment, referring to Figure 2 The brake wheel 130 is provided with an oil separation groove 136 on the side surface facing the accommodating groove 112, or the first shaft sleeve 132 is provided with an oil separation groove 136 on the side surface facing the accommodating groove 112, or both the brake wheel 130 and the first shaft sleeve 132 are provided with an oil separation groove 136 on the side surface facing the accommodating groove 112. The oil separation groove 136 is used to block the flow of oil. As can be seen, when the sealing structure on the main shaft 140 fails, the oil will flow along the surface of the first shaft sleeve 132 and the brake wheel 130, which will easily cause the oil to enter the machine base 110 and contaminate the brake surface 131 on the brake wheel 130. Therefore, the embodiment provides a groove on the brake wheel 130 or the first shaft sleeve 132, and the oil separation groove 136 retains part of the oil, which blocks the continuous flow of oil and effectively prevents the oil from easily contaminating the brake surface 131 when the sealing structure fails.

[0041] Further, the oil separation groove 136 is arranged on the brake wheel 130, and the oil separation groove 136 is arranged around the circumference of the brake wheel 130. Specifically, in the embodiment, the oil separation groove 136 is arranged on the connecting portion 133 of the brake wheel 130.

[0042] In one embodiment, referring to Figure 2The permanent magnet synchronous traction machine 100 further comprises a second cover 122 and a second sealing member 123. The second cover 122 is sleeved on the second shaft sleeve 121, and the second cover 122 is connected to the machine base 110. The second sealing member 123 is arranged between the second cover 122 and the second shaft sleeve 121. Therefore, the second cover 122 is sleeved on the second shaft sleeve 121, so that the second shaft sleeve 121 and the machine base 110 are sealed, effectively preventing the lubricating oil on the main shaft 140 from flowing to the second shaft sleeve 121, so that the traction sheave 120 is clean and tidy during operation. At the same time, the second sealing member 123 is arranged between the second cover 122 and the second shaft sleeve 121, and the sealing effect between the second cover 122 and the second shaft sleeve 121 is enhanced by the second sealing member 123, which greatly reduces the risk of oil leakage of the permanent magnet synchronous traction machine 100, and makes the permanent magnet synchronous traction machine 100 more safe, reliable and stable. The second sealing member 123 can be a sealing device such as felt, a rotating lip seal ring, or an O-shaped seal ring. In this embodiment, the second cover 122 is connected to the machine base 110 by bolts or screws.

[0043] In one embodiment, referring to Figure 2 The permanent magnet synchronous traction machine 100 further comprises a winding coil 160. The winding coil 160 is located in the accommodating groove 112, and the winding coil 160 is sleeved in the brake sheave 130. Therefore, the winding coil 160 and the brake sheave 130 of this embodiment constitute a motor, which drives the brake sheave 130 to rotate through the winding coil 160; the rotating brake sheave 130 drives the traction sheave 120 to rotate synchronously through the main shaft 140, so that the steel wire rope on the traction sheave 120 is wound or unwound, thereby realizing the operation of the elevator. Since the winding coil 160 is sleeved in the brake sheave 130, the motor constituted by this embodiment is an external rotor motor, that is, the brake sheave 130 is outside the winding coil 160, which can realize low speed and large torque output. In this embodiment, the machine base 110 is provided with a motor junction box 114, and the motor junction box 114 is electrically connected to the winding coil 160.

[0044] Further, referring to Figure 2 The bottom wall of the accommodating groove 112 is provided with a support member 113. The support member 113 is arranged around the circumference of the main shaft 140. The winding coil 160 is sleeved on the support member 113. Therefore, the support member 113 of this embodiment has a ring structure, so that the winding coil 160 is stably installed on the machine base 110, thereby making the permanent magnet synchronous traction machine 100 more stable in operation.

[0045] Further, the support 113 is provided with an oil separation groove 136, so as to effectively block the splashed oil, avoid the oil flowing into the air gap between the stator and the rotor, and thus affect the performance of the permanent magnet synchronous traction machine 100.

[0046] In one embodiment, referring to Figure 2 The permanent magnet synchronous traction machine 100 further comprises a bearing 150. The machine base 110 is provided with a third shaft sleeve 111. The bearing 150 is arranged in the third shaft sleeve 111, and the main shaft 140 is arranged on the bearing 150. In this way, the bearing 150 makes the main shaft 140 rotate more smoothly in the third shaft sleeve 111, so that the transmission among the brake wheel 130, the main shaft 140 and the traction wheel 120 is more smooth, and the attenuation of the torque transmission on the main shaft 140 is effectively reduced. In this embodiment, the first cover 134 is sleeved on the first shaft sleeve 132 and connected to the third shaft sleeve 111. The connection between the first cover 134 and the third shaft sleeve 111 can be bolt connection, screw connection, pin connection or other connection modes. At the same time, the second cover 122 is sleeved on the second shaft sleeve 121 and connected to the third shaft sleeve 111.

[0047] Further, referring to Figure 2 The third shaft sleeve 111 is provided with a mounting groove 1111, and the bearing 150 is arranged in the mounting groove 1111. In this way, arranging the bearing 150 in the mounting groove 1111 makes the bearing 150 more stable in the third shaft sleeve 111, so that the rotation of the main shaft 140 on the bearing 150 is more stable and smooth.

[0048] Further, the bearing 150 and the mounting groove 1111 are both two, and the two mounting grooves 1111 are respectively arranged at opposite ends of the third shaft sleeve 111. The bearing 150 and the mounting groove 1111 are arranged one by one, and the main shaft 140 is arranged on the two bearings 150. In this way, the stable rotation of the main shaft 140 in the third shaft sleeve 111 is ensured, so that the permanent magnet synchronous traction machine 100 operates stably, and the rotation of the traction wheel 120 is prevented from losing balance due to vibration of the main shaft 140.

[0049] In one embodiment, referring to Figure 2 The main shaft 140 is provided with a limiting protrusion 141, and the limiting protrusion 141 is located between the two bearings 150 and limitingly matched with the two bearings 150. In this way, the limiting protrusion 141 and the two bearings 150 are limitingly matched, so that the main shaft 140 can only rotate and cannot move along the axial direction, which greatly improves the stability of the main shaft 140 on the machine base 110.

[0050] Further, referring to Figure 2A third cover 142 is also fitted onto the main shaft 140. The third cover 142 is located between the limiting protrusion 141 and the bearing 150 near the traction sheave 120. One end of the third cover 142 is in a limiting engagement with the limiting protrusion 141, and the other end of the third cover 142 is in a limiting engagement with the bearing 150, axially fixing the bearing 150 and further improving the installation stability of the main shaft 140. At the same time, the third cover 142 can be equipped with a sealing element or a sealing gap fit to achieve a seal, effectively preventing the lubricating oil of the front bearing from entering the cavity between the two bearings.

[0051] In one embodiment, please refer to Figure 2 The brake wheel 130 is provided with a connecting part 133, and the third bushing 111 is connected to the brake wheel 130 through the connecting part 133, so that the third bushing 111 is stably connected to the brake wheel 130. Specifically, in this embodiment, the brake wheel 130, the connecting part 133 and the third bushing 111 are integrated into one structure, which greatly improves the structural strength of the permanent magnet synchronous traction machine 100 and ensures the stable operation of the permanent magnet synchronous traction machine 100.

[0052] Further, please refer to Figure 2 The connecting part 133 is inclined relative to the horizontal direction, and the end of the connecting part 133 connected to the third bushing 111 is closer to the bearing 150 than the end of the connecting part 133 connected to the brake wheel 130. Therefore, please refer to... Figure 2 In this embodiment, the connecting portion 133 forms a certain slope in front of the bearing 150, which is beneficial to improving the filling capacity of the molten metal, reasonably controlling solidification shrinkage, reducing casting internal stress, and reducing casting defects such as incomplete filling, shrinkage cavities, and cracks. At the same time, the connecting portion 133 on the brake wheel 130 is inclined towards the main shaft 140, reducing the gap between the connecting portion 133 and the support member 113. This not only helps to reduce and improve the overall size of the permanent magnet synchronous traction machine 100, but also makes the overall structure of the permanent magnet synchronous traction machine 100 more compact.

[0053] In one embodiment, please refer to Figure 1 The permanent magnet synchronous traction machine 100 also includes a brake 117. The brake 117 is mounted on the base 110, making the main machine structure simple, compact, and lightweight. The plate brake outputs a large braking torque, ensuring reliable and stable braking of the traction machine. Specifically, in this embodiment, the base 110 also has a brake junction box 115, which is electrically connected to the brake 117.

[0054] In one embodiment, please refer to Figure 2 The permanent magnet synchronous traction machine 100 also includes an encoder 170, which is used to provide feedback on the running speed and rotor position information of the motor.

[0055] In one embodiment, please refer to Figure 1The permanent magnet synchronous traction machine 100 further comprises a rope blocking member 116. The rope blocking member 116 is arranged on the machine base 110, and the rope blocking member 116 is used for limiting cooperation with the steel wire rope on the traction sheave 120. In this way, when the steel wire rope is wound or unwound, the rope blocking member 116 limits cooperation with the steel wire rope, so that one end of the steel wire rope is tightly attached to the traction sheave 120, effectively preventing the steel wire rope from jumping off, thereby ensuring the stable operation of the permanent magnet synchronous traction machine 100 and the elevator.

[0056] In one embodiment, referring to Figure 1 The traction sheave 120 is provided with a turning gear gear 180, so that when the elevator is running and power failure or failure occurs, the turning gear gear 180 makes the movement of the car more easy.

[0057] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0058] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on 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 all within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. A permanent magnet synchronous traction machine, characterized by, The utility model relates to a kind of permanent magnet synchronous traction machine, including: Machine base; Tractive wheel and brake wheel, the tractive wheel and the brake wheel are located at the opposite sides of the machine base respectively, the side surface of the machine base towards the brake wheel is equipped with accommodating groove, the brake wheel is located in the accommodating groove, brake surface is equipped on the brake wheel, and the brake surface is arranged towards the side wall of the accommodating groove;And Main shaft, the main shaft is rotatably arranged through the machine base, and the brake wheel and the tractive wheel are connected on the main shaft and synchronously rotated by the main shaft; The first shaft sleeve and the second shaft sleeve are both sleeved on the main shaft and synchronously rotated with the main shaft, and the first shaft sleeve and the second shaft sleeve are equipped on the brake wheel and the tractive wheel; The first shaft sleeve and / or the second shaft sleeve are connected with the main shaft by key connection mode;Or, The first shaft sleeve and / or the second shaft sleeve are connected with the main shaft by expansion connection sleeve;Or, The first shaft sleeve and / or the second shaft sleeve are connected with the main shaft by end cover; The brake wheel and / or the first shaft sleeve are equipped with oil separation groove towards the side surface in the accommodating groove, and the oil separation groove is used to block the flow of oil pollution; It further includes brake, the brake is installed on the machine base, and the brake is engaged with the brake surface.

2. The permanent magnet synchronous traction machine of claim 1, wherein, It further includes first cover, the first cover is sleeved on the first shaft sleeve, and the first cover is connected on the machine base.

3. The permanent magnet synchronous traction machine of claim 2, wherein, It further includes first sealing element, and the first sealing element is arranged between the first cover and the first shaft sleeve.

4. The permanent magnet synchronous traction machine of claim 1, wherein, It further includes winding coil, and the winding coil is located in the accommodating groove, and the winding coil is sleeved in the brake wheel.

5. The permanent magnet synchronous traction machine of claim 4, wherein, The bottom wall of the accommodating groove is equipped with support, the support is arranged around the circumference of the main shaft, and the winding coil is sleeved on the support.

6. The permanent magnet synchronous traction machine of any one of claims 1-5, wherein, It further includes bearing, the third shaft sleeve is equipped on the machine base, the bearing is arranged in the third shaft sleeve, and the main shaft is installed on the bearing.

7. The permanent magnet synchronous traction machine of any one of claims 1-5, wherein, The permanent magnet synchronous traction machine further includes rope blocking element, the rope blocking element is installed on the machine base, and the rope blocking element is used to prevent the steel wire rope on the tractive wheel from jumping off.

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