Elevator hoisting machine and dust protection device for elevator hoisting machine

Abstract

This disclosure provides an elevator traction machine and a dustproof device for an elevator traction machine, which can suppress the amount of dust flowing into the motor with a simple structure and can more reliably ensure the cooling function inside the motor. In the elevator traction machine, a first cover (61) having a first dust filter (612) covers the cooling air intake (511) formed in the motor (5). A second cover (62) having a second dust filter (622) is installed in the motor (5) in a detachable manner with the first cover (61) positioned on the side opposite to the cooling air intake (511). A blower (7) generates an airflow as cooling air that flows from the outside of the motor (5) through the dustproof device (6) and the cooling air intake (511) in sequence into the motor (5). The cooling air generated by the operation of the blower (7) passes through the second dust filter (622) and the first dust filter (612) in sequence in the dustproof device (6).

Description

Technical Field

[0001] This disclosure relates to elevator traction machines and dustproof devices for elevator traction machines. Background Technology

[0002] During building construction, elevator traction machines are sometimes used to transport materials. When the elevator traction machine is running, cooling air generated by the rotation of the fan flows inside the motor, thereby cooling the motor's interior. Therefore, if the elevator traction machine is operated during building construction, cooling air containing a large amount of dust will flow into the motor's interior, easily causing motor malfunctions.

[0003] Patent Document 1 discloses an elevator traction machine. To suppress the amount of dust flowing into the motor, an annular pipe is formed between the outer and inner covers, allowing a portion of the cooling air flowing through the annular pipe to enter the motor. An exhaust pipe is formed at the lower end of the annular pipe. Due to the inertia caused by the flow of the cooling air, the dust-laden air flowing through the annular pipe does not flow into the motor but instead flows into the exhaust pipe. Thus, the amount of dust flowing into the motor is suppressed.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 9-56120 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] In the existing elevator traction machine disclosed in Patent Document 1, in order to suppress the amount of dust flowing into the motor, it is necessary not only to form an annular pipe between the outer and inner covers, but also to form an exhaust pipe at the lower end of the annular pipe. Therefore, the construction for suppressing the amount of dust flowing into the motor becomes complicated.

[0009] Furthermore, in the existing elevator traction machine disclosed in Patent Document 1, only a portion of the cooling air flowing in the annular duct flows inside the motor. Therefore, the amount of cooling air flowing inside the motor is reduced. Consequently, during normal operation of an elevator where the motor output is higher than during building construction, it is difficult to ensure adequate cooling of the motor's internal components.

[0010] This disclosure was made to solve the aforementioned problems, and its purpose is to provide an elevator traction machine and a dustproof device for an elevator traction machine that can suppress the amount of dust flowing into the motor with a simple structure and can more reliably ensure the cooling function inside the motor.

[0011] Methods for solving problems

[0012] The elevator traction machine disclosed herein includes: a drive sheave; a motor having a cooling air inlet that generates a driving force to rotate the drive sheave; a dustproof device installed on the motor to cover the cooling air inlet; and a blower that generates airflow as cooling air that flows from the outside of the motor through the dustproof device and the cooling air inlet sequentially into the motor. The dustproof device includes: a first cover that covers the cooling air inlet; and a second cover that is detachably installed on the motor in a position opposite to the cooling air inlet side of the first cover. The first cover has a first dust filter, and the second cover has a second dust filter. The cooling air generated by the operation of the blower passes sequentially through the second dust filter and the first dust filter in the dustproof device.

[0013] Furthermore, the dustproof device for elevator traction machines disclosed herein includes: a first cover covering a cooling air intake, the cooling air intake being formed in a motor that generates a driving force to rotate a drive sheave; and a second cover that is detachably mounted to the motor in a position opposite to the cooling air intake of the first cover. The first cover has a first dust filter, and the second cover has a second dust filter. With the first and second covers mounted to the motor, cooling air generated by the operation of a blower flows from the outside of the motor through the second dust filter, the first dust filter, and the cooling air intake in sequence into the interior of the motor.

[0014] Invention Effects

[0015] The elevator traction machine and dustproof device for elevator traction machine disclosed herein can suppress the amount of dust flowing into the motor with a simple structure and can more reliably ensure the cooling function inside the motor. Attached Figure Description

[0016] Figure 1 This is a schematic partial sectional view of the elevator traction machine according to Embodiment 1.

[0017] Figure 2 It is a schematic representation Figure 1 A side view of the elevator traction machine.

[0018] Figure 3 It means Figure 1 An enlarged view of the cover mounting part being installed on the motor housing by mounting screws.

[0019] Figure 4 It means through Figure 1 A partial cross-sectional view of the path of the cooling air generated by the operation of the blower as it flows inside the motor.

[0020] Figure 5 It is a schematic representation Figure 1 A partial sectional view of the elevator traction machine when the second cover is removed from the motor.

[0021] Figure 6 It is a schematic representation Figure 5 A side view of the elevator traction machine.

[0022] Figure 7 It means through Figure 5 A partial cross-sectional view of the path of the cooling air generated by the operation of the blower as it flows inside the motor.

[0023] Figure 8 This is a partial cross-sectional view showing the path of the cooling air generated by the operation of the blower in the elevator traction machine of Embodiment 2 as it flows inside the motor.

[0024] Figure 9 It means Figure 8 An enlarged view of the second cover being installed on top of the first cover using mounting hardware.

[0025] Label Explanation

[0026] 3: Drive pulley; 5: Motor; 6: Dustproof device; 7: Blower; 61: First cover; 62: Second cover; 63: Mounting screw (mounting part); 64: Mounting part; 511: Cooling air intake; 612: First dust filter; 621a: Cover mounting part; 622: Second dust filter. Detailed Implementation

[0027] The embodiments of the present disclosure will be described with reference to the accompanying drawings. In the drawings, identical or equivalent parts are labeled with the same reference numerals, and repeated descriptions are appropriately simplified or omitted. Furthermore, the present disclosure is not limited to the following embodiments; any modifications or omissions of any constituent elements of the embodiments are permitted without departing from the spirit of the present disclosure.

[0028] Implementation method 1.

[0029] In the construction of a building where an elevator is installed, an elevator traction machine as described in Embodiment 1 is used to move construction materials and other work items. The elevator traction machine is located in a machine room situated above the building's shaft. During construction, the elevator traction machine moves unloading ropes, which suspend the work items within the shaft, vertically, thereby moving the work items vertically.

[0030] After an elevator is installed in a building, the elevator traction machine used during the building's construction is used as the elevator's drive unit. In an elevator, elevator ropes suspending the car and counterweight within the shaft are wound around the elevator traction machine. During normal operation of the elevator, the driving force of the elevator traction machine moves the elevator ropes, thereby moving the car and counterweight vertically within the shaft.

[0031] Figure 1 This is a schematic partial sectional view illustrating the elevator traction machine of Embodiment 1. Additionally, Figure 2 It is a schematic representation Figure 1 A side view of the elevator traction machine. Figure 1 and Figure 2 The diagram illustrates the state of an elevator traction machine during the handling of construction materials in a building construction project. In the figure, the elevator traction machine includes a support platform 1, a main shaft 2, a drive sheave 3, and a traction machine body 4. The main shaft 2, drive sheave 3, and traction machine body 4 are supported on the support platform 1.

[0032] The support platform 1 has a base 11, a first support portion 12, and a second support portion 13. The base 11 is horizontally disposed in the machine room. The first support portion 12 and the second support portion 13 are fixed to the upper surface of the base 11.

[0033] The spindle 2 is mounted above the base 11 on the first support portion 12 and the second support portion 13. The spindle 2 is arranged horizontally. The first support portion 12 and the second support portion 13 are arranged in a position that is separated from each other in the direction along the axis of the spindle 2.

[0034] Through holes 14 for the spindle 2 to pass through are formed in the first support portion 12 and the second support portion 13, respectively. In each of the first support portion 12 and the second support portion 13, a bearing 15 is embedded between the inner circumferential surface of the through hole 14 and the outer circumferential surface of the spindle 2. Thus, the spindle 2 is rotatably supported in the first support portion 12 and the second support portion 13 via the bearings 15.

[0035] The drive pulley 3 is fixed to the main shaft 2. Thus, the drive pulley 3 rotates integrally with the main shaft 2 relative to the support platform 1. The drive pulley 3 is disposed in the space between the first support portion 12 and the second support portion 13.

[0036] On the outer periphery of the drive sheave 3, multiple rope grooves (not shown) are formed along the circumference of the drive sheave 3. During the construction of the building, unloading ropes for suspending construction materials and other transported items are wound around the drive sheave 3. The unloading ropes for suspending construction materials are inserted into any of the multiple rope grooves.

[0037] The traction machine body 4 is supported on the first support portion 12. The traction machine body 4 is positioned on the side opposite to the drive sheave 3 when viewed from the first support portion 12, along the axial direction of the main shaft 2. The traction machine body 4 includes a motor 5, a dustproof device 6, and a blower 7.

[0038] Motor 5 generates a driving force that rotates the main shaft 2 and the drive pulley 3. Motor 5 has a motor housing 51, a stator 52 and a rotor 53.

[0039] The motor housing 51 is cylindrical in shape. The motor housing 51 is positioned to surround the axis of the main shaft 2. One end of the motor housing 51 is fixed to the first support 12. An opening is formed at the other end of the motor housing 51 as a cooling air inlet 511.

[0040] The stator 52 is disposed inside the motor housing 51. The stator 52 is cylindrical in shape. The stator 52 is coaxially disposed with the main shaft 2. One end of the stator 52 is fixed to the first support portion 12. An opening is formed at the other end of the stator 52. In this embodiment, a gap is formed between the outer peripheral surface of the stator 52 and the inner peripheral surface of the motor housing 51.

[0041] The stator 52 has a stator core and stator windings. The stator core is cylindrical in shape. The stator core is fixed to the first support portion 12. The stator core is coaxially arranged with the main shaft 2. The stator core is a stacked core composed of multiple magnetic plates stacked along the axial direction of the main shaft 2. The stator windings are disposed on the stator core. Power can be supplied to the stator windings from an external power source (not shown).

[0042] The rotor 53 is disposed inside the stator 52. The rotor 53 is fixed to the main shaft 2. Thus, the rotor 53 rotates integrally with the main shaft 2. The rotor 53 is cylindrical in shape. The rotor 53 is coaxially arranged with the main shaft 2. A gap is formed between the outer circumferential surface of the rotor 53 and the inner circumferential surface of the stator 52.

[0043] The rotor 53 has a rotor core and multiple permanent magnets. The rotor core is fixed on the main shaft 2. Multiple permanent magnets are disposed on the rotor core. Thus, multiple magnetic poles are formed in the rotor 53.

[0044] In the stator 52, a rotating magnetic field is generated by supplying power to the stator windings. When the stator 52 generates a rotating magnetic field, the rotor 53 rotates integrally with the main shaft 2 relative to the support platform 1 about the axis of the main shaft 2. Thus, by supplying power to the stator windings, the motor 5 generates a driving force that rotates the main shaft 2 and the drive sheave 3. With the rope for suspending the workpiece wound around the drive sheave 3, the workpiece moves vertically according to the rotation of the drive sheave 3.

[0045] The dustproof device 6 is installed on the motor 5 as a dustproof device for the elevator traction machine, covering the cooling air intake 511. The dustproof device 6 removes dust from the air by capturing dust mixed in with the air passing through it.

[0046] The blower 7 is mounted on the motor housing 51. The blower 7 is positioned outside the motor 5 to cover a through hole (not shown) or vent formed on the outer wall of the motor housing 51. The vent is formed in the motor housing 51 at a position adjacent to the first support portion 12.

[0047] The blower 7 has a fan (not shown) and a fan motor (not shown). Power is supplied to the fan motor, which generates a driving force to rotate the fan. By rotating the fan, the blower 7 generates airflow as cooling air to cool the interior of the motor 5. The cooling air flows from the outside of the motor 5 through the dustproof device 6 and the cooling air inlet 511, then exits to the outside of the motor 5 through a vent. Within the traction machine body 4, the cooling air flows inside the motor 5 to cool it, thereby preventing motor malfunctions caused by temperature rise.

[0048] Dust particles are mixed into the air surrounding motor 5. Therefore, when cooling air is generated by the operation of fan 7, dust particles may flow into the motor 5 along with the cooling air. If the amount of dust flowing into the motor 5 increases and exceeds the allowable amount, the motor 5 may malfunction due to the dust. Dustproof device 6 captures the dust particles mixed in with the cooling air passing through it and removes the dust from the cooling air. As a result, the amount of dust flowing into the motor 5 is suppressed.

[0049] The dustproof device 6 has a first cover 61 and a second cover 62.

[0050] The first cover 61 is installed on the motor housing 51 to cover the cooling air intake 511. The first cover 61 is installed on the motor housing 51 by welding, screws, etc. The first cover 61 has a first cover main body 611 and a first dust filter 612.

[0051] The first cover body component 611 is a plate-shaped component. The shape of the first cover body component 611 is matched with the shape of the cooling air intake 511. In this embodiment, the first cover body component 611 is circular. The outer periphery of the first cover body component 611 is mounted to the motor housing 51. A plurality of first openings 613 are provided on the first cover body component 611.

[0052] First dust filters 612 are disposed in a plurality of first openings 613. Furthermore, the first dust filters 612 are mounted on the first cover body component 611. The first dust filters 612 are made of a material through which air can pass. For example, fibers are used as the material for the first dust filters 612. Moreover, when air passes through the first dust filters 612, the first dust filters filtration and capture dust mixed in with the air.

[0053] In the first cover 61, for example, a pressure plate may be installed on the main body 611 of the first cover, and a portion of the first dust filter 612 may be pressed against the main body 611 of the first cover by the pressure plate, thereby installing the first dust filter 612 onto the main body 611 of the first cover. Alternatively, in the first cover 61, for example, with the first dust filter 612 positioned in the first opening 613, the main body 611 of the first cover may be clamped by a pair of wire meshes, thereby installing the first dust filter 612 onto the main body 611 of the first cover.

[0054] The second cover 62 is mounted on the motor 5 in a position opposite to the cooling air inlet 511 of the first cover 61. Thus, the second cover 62 is positioned upstream of the first cover 61 in the cooling air generated by the operation of the blower 7.

[0055] In this embodiment, the second cover 62 is mounted to the motor housing 51 using mounting screws 63, which serve as mounting components. Therefore, by removing the mounting screws 63 from the motor housing 51, the second cover 62 can be removed from the motor housing 51. In other words, the second cover 62 is mounted to the motor 5 in a detachable manner.

[0056] The second cover 62 has a second cover body component 621 and a second dust filter 622.

[0057] The outer periphery of the second cover main component 621 becomes a cylindrical cover mounting portion 621a. Thus, the outer periphery of the second cover 62 becomes the cover mounting portion 621a. With the second cover 62 mounted on the motor housing 51, the first cover 61 is positioned inside the cover mounting portion 621a, and the inner peripheral surface of the cover mounting portion 621a fits into the outer peripheral surface of the motor housing 51. Therefore, the cover mounting portion 621a overlaps with the outer peripheral surface of the motor housing 51, avoiding the first cover 61. The cover mounting portion 621a is mounted to the motor housing 51 by mounting screws 63, thereby mounting the second cover 62 to the motor housing 51.

[0058] Here, Figure 3 It means Figure 1The enlarged view shows the cover mounting portion 621a mounted to the motor housing 51 by mounting screws 63. A through hole 621b is formed in the cover mounting portion 621a for the threaded portion of the mounting screw 63 to pass through. The through hole 621b is a through hole that passes through the cover mounting portion 621a. By screwing the threaded portion of the mounting screw 63, which passes through the through hole 621b, into the threaded hole of the motor housing 51, the cover mounting portion 621a is secured to the motor housing 51. Thus, the cover mounting portion 621a is mounted to the motor housing 51.

[0059] like Figure 1 As shown, a plurality of second openings 623 are provided on the second cover body component 621. The position of each second opening 623 is determined according to the position of each first opening 613. The size of each second opening 623 is larger than the size of each first opening 613. Thus, when the dustproof device 6 is viewed along the axial direction of the main shaft 2, the area of ​​each first opening 613 is contained within the area of ​​each second opening 623.

[0060] Second dust filters 622 are disposed in a plurality of second openings 623. Furthermore, the second dust filters 622 are mounted on the second cover body component 621. The second dust filters 622 are made of a material through which air can pass. For example, fibers are used as the material for the second dust filters 622. Moreover, when air passes through the second dust filters 622, the second dust filters capture dust particles mixed in with the air.

[0061] In the second cover 62, for example, a pressure plate can be installed on the main body 621 of the second cover, and a portion of the second dust filter 622 can be pressed against the main body 621 of the second cover by the pressure plate, thereby installing the second dust filter 622 onto the main body 621 of the second cover. Alternatively, in the second cover 62, for example, with the second dust filter 622 positioned in the second opening 623, the main body 621 of the second cover can be clamped by a pair of wire mesh, thereby installing the second dust filter 622 onto the main body 621 of the second cover.

[0062] The mesh size of the second dust filter 622 is finer than that of the first dust filter 612. Therefore, the second dust filter 622 can capture dust particles smaller than those captured by the first dust filter 612. On the other hand, the first dust filter 612 allows cooling air to pass through more easily than the second dust filter 622.

[0063] Figure 4 It means through Figure 1A partial cross-sectional view of the path of the cooling air generated by the operation of the blower 7 as it flows inside the motor 5. As shown by arrow A, the cooling air generated by the operation of the blower 7 flows from the outside of the motor 5 into the interior of the motor 5, passing sequentially through the second dust filter 622, the first dust filter 612, and the cooling air inlet 511. At this time, dust mixed in with the cooling air is captured by the second dust filter 622 and the first dust filter 612, respectively. Thus, the amount of dust flowing into the interior of the motor 5 is suppressed.

[0064] Then, cooling air flows towards the first support portion 12 inside the motor 5, specifically in the gaps between the motor housing 51 and the stator 52, and between the stator 52 and the rotor 53. At this time, the stator 52 and the rotor 53 are cooled by the cooling air. Afterward, the cooling air is discharged from the vent of the motor 5 to the outside of the motor 5 through the blower 7.

[0065] During building construction, the amount of dust mixed in with the air around motor 5 increases. Therefore, during building construction, the amount of dust flowing into the interior of motor 5 along with the cooling air generated by the operation of blower 7 may exceed the allowable amount of motor 5.

[0066] During building construction, with the first cover 61 and the second cover 62 respectively installed in the dustproof device 6 on the motor 5, the construction materials are transported by an elevator traction machine. As a result, dust mixed in with the cooling air is removed by the first cover 61 and the second cover 62 respectively, more reliably suppressing the amount of dust flowing into the motor 5.

[0067] Furthermore, during building construction, the materials being transported are moved at low speeds, thus suppressing the output of the elevator traction machine's motor 5. Consequently, the internal temperature of the motor 5 is unlikely to rise during building construction. Therefore, even though the amount of cooling air flowing inside the motor 5 is limited by the resistance of the first cover 61 and the second cover 62, the cooling function of cooling the stator 52 and the rotor 53 separately can be ensured during building construction.

[0068] Next, the elevator traction machine during normal operation will be explained. After the building construction is completed and the elevator is installed in the building, normal operation of the elevator is carried out. During normal operation of the elevator, the elevator traction machine is operated with the second cover 62 removed from the motor 5.

[0069] Figure 5 It is a schematic representation Figure 1 A partial sectional view of the elevator traction machine when the second cover 62 is removed from the motor 5. Figure 6 It is a schematic representation Figure 5A side view of the elevator traction machine. The second cover 62 is removed from the motor 5 by removing the mounting screw 63 from the motor housing 51. Therefore, during normal operation of the elevator, only the first cover 61 and the second cover 62 are installed on the motor housing 51. The mounting screw 63 is screwed into the threaded hole of the motor housing 51 after the second cover 62 has been removed. Thus, during normal operation of the elevator, the threaded hole of the motor housing 51 is blocked by the mounting screw 63.

[0070] Figure 7 It means through Figure 5 A partial cross-sectional view of the path of the cooling air generated by the operation of the blower 7 as it flows inside the motor 5. As shown by arrow A, the cooling air generated by the operation of the blower 7 flows from the outside of the motor 5 through the first dust filter 612 and the cooling air inlet 511 into the motor 5. At this time, dust mixed in with the cooling air is captured by the first dust filter 612. In addition, the threaded hole of the motor housing 51 is blocked by the mounting screw 63, thus preventing the cooling air from flowing into the motor 5 from the outside of the motor 5 through the threaded hole of the motor housing 51. As a result, the amount of dust flowing into the motor 5 is suppressed. The subsequent cooling air flow path is the same as when the second cover 62 is installed on the motor 5. As a result, the stator 52 and the rotor 53 are cooled by the cooling air respectively, ensuring the cooling function of cooling the stator 52 and the rotor 53 separately.

[0071] During normal operation of the elevator, the amount of dust mixed in with the air around the motor 5 is less than during building construction. Therefore, even if the second cover 62 is not installed on the motor 5, the amount of dust flowing into the interior of the motor 5 is sufficiently suppressed by the first dust filter 612 during normal operation of the elevator.

[0072] Furthermore, during normal elevator operation, the output of the elevator traction machine motor 5 is higher than that of the elevator traction machine motor 5 during building construction. Consequently, the internal temperature of the motor 5 tends to rise during normal elevator operation. However, during normal elevator operation, since the second cover 62 is removed from the motor 5, cooling air flows into the motor 5 more easily than during building construction, resulting in a greater amount of cooling air flowing inside the motor 5. Therefore, even during normal elevator operation where the internal temperature of the motor 5 tends to rise, sufficient cooling air can be ensured for both the stator 52 and rotor 53.

[0073] In this elevator traction machine, the dustproof device 6 has a first cover 61 and a second cover 62. The first cover 61 covers the cooling air inlet 511 formed on the motor 5. The second cover 62 is installed on the motor 5 in a detachable manner, positioned on the side opposite to the cooling air inlet 511 of the first cover 61. The first cover 61 has a first dust filter 612. The second cover 62 has a second dust filter 622. The blower 7 generates airflow as cooling air that flows from the outside of the motor 5 through the dustproof device 6 and the cooling air inlet 511 in sequence and flows inside the motor 5. The cooling air generated by the operation of the blower 7 passes through the second dust filter 622 and the first dust filter 612 in sequence in the dustproof device 6.

[0074] Therefore, by simply installing the first cover 61 and the second cover 62 onto the motor 5, dust mixed in with the cooling air flowing into the motor 5 can be removed from the cooling air using the second dust filter 622 and the first dust filter 612, respectively. Thus, even when a large amount of dust is mixed in the air surrounding the motor 5 during building construction, dust flowing into the motor 5 can be removed more reliably. Furthermore, the cooling air that has passed through the second dust filter 622 and the first dust filter 612 can flow inside the motor 5. Therefore, during building construction, the amount of dust flowing into the motor 5 can be suppressed with a simple structure, and the cooling function inside the motor 5 can be ensured more reliably.

[0075] Furthermore, during normal elevator operation, the amount of dust mixed in with the air around the motor 5 is less than during building construction. Therefore, even when the second cover 62 is removed from the motor 5, the amount of dust removed from the cooling air by the first dust filter 612 does not exceed the allowable amount of dust for the motor 5. Thus, even during normal elevator operation, the amount of dust flowing into the motor 5 can be suppressed with a simple structure. Additionally, when the second cover 62 is removed from the motor 5, the amount of cooling air flowing into the motor 5 increases. Therefore, during normal elevator operation, the amount of dust flowing into the motor 5 can be suppressed, and the amount of cooling air flowing inside the motor 5 can be increased. Therefore, even during normal elevator operation with a high motor output, the amount of dust flowing into the motor 5 can be suppressed with a simple structure, and the cooling function inside the motor 5 can be more reliably ensured.

[0076] Furthermore, since the second cover 62 is detachably mounted on the motor 5, it can be removed from the elevator traction machine's motor 5 and reused by installing it on the motors of other elevator traction machines used during building construction. Therefore, when multiple elevator traction machines are used in building construction, the cost per elevator traction machine can be reduced.

[0077] Furthermore, the outer periphery of the second cover 62 forms a cover mounting portion 621a that overlaps with the motor 5, bypassing the first cover 61. The cover mounting portion 621a is mounted to the motor 5 by mounting screws 63. Therefore, the second cover 62 can be mounted to the motor 5 with a simple structure.

[0078] Furthermore, the mesh size of the second dust filter 622 is finer than that of the first dust filter 612. Therefore, during building construction, the second dust filter 622 can more reliably capture dust mixed in with the cooling air flowing into the motor 5. This allows for more reliable suppression of the amount of dust flowing into the motor 5. Additionally, the first dust filter 612 allows cooling air to pass through more easily than the second dust filter 622, thus suppressing the reduction in the amount of cooling air flowing into the motor 5. This ensures more reliable cooling of the motor 5's interior.

[0079] Furthermore, in this dustproof device 6, the first cover 61 has a first dust filter 612, and the second cover 62 has a second dust filter 622. With the first cover 61 and the second cover 62 installed on the motor 5, cooling air generated by the operation of the blower 7 flows from the outside of the motor 5 through the second dust filter 622, the first dust filter 612, and the cooling air inlet 511, and then flows inside the motor 5. Therefore, during building construction, by installing the first cover 61 and the second cover 62 on the motor 5, the amount of dust flowing into the motor 5 can be suppressed with a simple structure, and the cooling function of the motor 5 can be more reliably ensured. Additionally, during normal elevator operation, by removing the second cover 62 from the motor 5, the amount of dust flowing into the motor 5 can be suppressed with a simple structure, and the cooling function of the motor 5 can be more reliably ensured.

[0080] Implementation method 2.

[0081] Figure 8 This is a partial cross-sectional view showing the path of the cooling air generated by the operation of the blower in the elevator traction machine of Embodiment 2 as it flows inside the motor. The main body component 621 of the second cover 62 is a plate-shaped component.

[0082] The second cover 62 is mounted to the first cover 61 via the mounting member 64. Thus, the second cover 62 is mounted to the motor 5 via the first cover 61. With the second cover 62 mounted to the motor 5 via the first cover 61, the mounting member 64 is positioned between the first cover 61 and the second cover 62. The other structures of the second cover 62 are the same as those of the second cover 62 in Embodiment 1.

[0083] Figure 9 It means Figure 8An enlarged view of the second cover 62 mounted on the first cover 61 via mounting member 64. Each mounting member 64 has a first hook member 641 and a second hook member 642.

[0084] The first hook-and-hook component 641 is fixed to the first cover body component 611 of the first cover 61. The first hook-and-hook component 641 is arranged along a circle centered on the axis of the main shaft 2, covering the entire circumference of the first cover 61. The first hook-and-hook component 641 has a first fixing part 641a and a first insertion part 641b.

[0085] The first fixing part 641a is fixed to the first cover body component 611 by a welding part 643. Alternatively, the first fixing part 641a can also be fixed to the first cover body component 611 by screws, for example. The first fixing part 641a is arranged all around the circumference of the first cover 61.

[0086] The first insertion portion 641b protrudes radially outward from the first fixing portion 641a into the first cover 61. A gap is formed between the first insertion portion 641b and the first cover body member 611, opening radially outward into the first cover 61. In the first hook member 641, the first insertion portion 641b is only formed on a portion of the circumferential direction of the first cover 61, and there is a partial defect in the first insertion portion 641b in the circumferential direction of the first cover 61. In this embodiment, the first fixing portion 641a and the first insertion portion 641b are formed by processing a metal plate.

[0087] The second hook member 642 is fixed to the second cover body member 621 of the second cover 62. The second hook member 642 is arranged around the entire circumference of the second cover 62, centered on the axis of the main shaft 2. The second hook member 642 has a second fixing part 642a and a second insertion part 642b.

[0088] The second fixing part 642a is fixed to the second cover body component 621 by a welding part 644. Alternatively, the second fixing part 642a can also be fixed to the second cover body component 621 by screws, for example. The second fixing part 642a is arranged all around the circumference of the second cover 62.

[0089] The second insertion portion 642b protrudes radially inward from the second fixing portion 642a into the second cover 62. A gap opening radially inward into the second cover 62 is formed between the second insertion portion 642b and the second cover body component 621. In the second hook member 642, the second insertion portion 642b is only formed on a portion of the second cover 62 in the circumferential direction, and there is a partial defect in the second insertion portion 642b in the circumferential direction of the second cover 62. In this embodiment, the second fixing portion 642a and the second insertion portion 642b are formed by processing a metal plate.

[0090] In the mounting member 64, the first insertion part 641b overlaps with the second cover 62 at the position of the missing portion of the second insertion part 642b. After the second insertion part 642b overlaps with the first cover 61 at the position of the missing portion of the first insertion part 641b, the second cover 62 is rotated circumferentially relative to the first cover 61, thereby combining the first hook member 641 and the second hook member 642. In the combined state of the first hook member 641 and the second hook member 642, the first insertion part 641b is inserted into the gap between the second insertion part 642b and the second cover body member 621. Additionally, in the combined state of the first hook member 641 and the second hook member 642, the second insertion part 642b is inserted into the gap between the first insertion part 641b and the first cover body member 611. By combining the first hook member 641 and the second hook member 642, the mounting member 64 mounts the second cover 62 onto the first cover 61.

[0091] With the second cover 62 mounted on the first cover 61 via the mounting member 64, a first hook member 641 and a second hook member 642 are present around the entire circumference of the first cover 61. This prevents cooling air from flowing into the interior of the motor 5 from the outside through the gap between the first cover 61 and the second cover 62.

[0092] Furthermore, by rotating the second cover 62 relative to the first cover 61, the positions of the missing portions of the first insertion portion 641b and the second insertion portion 642b are aligned, and the positions of the missing portions of the second insertion portion 642b and the first insertion portion 641b are also aligned, thereby allowing the second cover 62 to be removed from the first cover 61. Therefore, the second cover 62 is detachably mounted to the first cover 61 via the mounting member 64. Other structures are the same as in Embodiment 1. Additionally, the states of the elevator traction machines during building construction and normal elevator operation are also the same as in Embodiment 1.

[0093] In this elevator traction machine and dustproof device 6, the second cover 62 is mounted to the first cover 61 via a mounting member 64, and thus can be detachably mounted to the motor 5 via the first cover 61. Therefore, the second cover 62 can be directly mounted to the motor 5 without bypassing the first cover 61. This further simplifies the structure of the second cover 62.

[0094] Furthermore, in Embodiment 2, the second cover 62 is mounted to the first cover 61 by combining the first hook member 641 and the second hook member 642. However, the structure of the mounting member 64 is not limited to this. For example, a screw that allows the second cover 62 to be detachably mounted to the first cover 61 can also be used as the mounting member 64. In this case, the second cover 62 is mounted to the first cover 61 by screwing a screw that passes through a through hole provided in the second cover body member 621 into a threaded hole in the first cover body member 611. Even so, it is not necessary to bypass the first cover 61 and directly mount the second cover 62 to the motor 5, which further simplifies the structure of the second cover 62. In addition, the gap between the first cover body member 611 and the second cover body member 621 can be eliminated along the entire circumference of the first cover 61. As a result, cooling air can be prevented from flowing into the interior of the motor 5 from the outside of the motor 5 through the gap between the first cover 61 and the second cover 62.

[0095] Alternatively, the mounting member 64 of Embodiment 2 can be provided between the inner peripheral surface of the cover mounting portion 621a of Embodiment 1 and the outer peripheral surface of the motor housing 51. Even so, the second cover 62 can be mounted to the motor 5 in a detachable manner with a simple structure.

[0096] Furthermore, in each of the above embodiments, a gap is formed between the motor housing 51 and the stator 52. However, it is also possible not to form a gap between the motor housing 51 and the stator 52. In this case, the outer peripheral surface of the stator 52 can be directly fixed to the inner peripheral surface of the motor housing 51. Even so, since the stator 52 is cooled by the airflow flowing in the gap between the stator 52 and the rotor 53, the cooling function of the stator 52 can be ensured.

[0097] Furthermore, in each of the above embodiments, the motor 5 has a motor housing 51. However, the motor housing 51 may not be present. In this case, the opening formed at the other end of the stator 52 becomes a cooling air intake. In this case, the first cover 61 and the second cover 62 are mounted on the stator 52. Even so, the amount of dust flowing into the interior of the motor 5 can be suppressed with a simple structure, and the cooling function of the interior of the motor 5 can be more reliably ensured.

[0098] Furthermore, in each of the above embodiments, the spindle 2 is rotatably supported on the support platform 1 via two bearings 15. However, the number of bearings 15 between the spindle 2 and the support platform 1 can be one, or it can be three or more. Additionally, if the spindle 2 is rotatably supported on the support platform 1, then bearings may not be required between the spindle 2 and the support platform 1.

[0099] Furthermore, in each of the above embodiments, the mesh size of the second dust filter 622 is finer than that of the first dust filter 612. However, the mesh size of the second dust filter 622 may also be coarser than that of the first dust filter 612. Alternatively, the mesh size of the second dust filter 622 may be the same as that of the first dust filter 612. Even so, the amount of dust flowing into the interior of the motor 5 can be suppressed with a simple structure, and the cooling function of the interior of the motor 5 can be more reliably ensured.

[0100] The above-described embodiments represent one example of the content of this disclosure. These embodiments can be combined with other known technologies. Without departing from the spirit of this disclosure, parts of the structure of the embodiments can be omitted or modified.

Claims

1. An elevator traction machine, comprising: Drive pulley; A motor having a cooling air inlet generates a driving force that rotates the drive sheave. A dustproof device, which is installed on the motor to cover the cooling air intake; and A blower generates airflow as cooling air that flows from the outside of the motor through the dustproof device and the cooling air inlet in sequence into the motor. The dustproof device includes: a first cover that covers the cooling air intake; and a second cover that is detachably mounted to the motor while positioned on the side opposite to the cooling air intake of the first cover. The first cover has a first dust filter. The second cover has a second dust filter. The cooling air generated by the operation of the blower passes sequentially through the second dust filter and the first dust filter in the dustproof device.

2. The elevator traction machine according to claim 1, wherein, The outer periphery of the second cover becomes a cover mounting portion that overlaps with the motor, avoiding the first cover. The cover mounting part is mounted to the motor via a mounting component.

3. The elevator traction machine according to claim 1, wherein, The second cover is mounted to the first cover via a mounting bracket, thereby being mounted to the motor via the first cover.

4. The elevator traction machine according to any one of claims 1 to 3, wherein, The mesh size of the second dust filter is finer than that of the first dust filter.

5. A dustproof device for an elevator traction machine, comprising: A first cover covers a cooling air intake, which is formed in a motor that generates the driving force to rotate the drive sheave; and The second cover, positioned on the side opposite to the cooling air inlet of the first cover, is detachably mounted to the motor. The first cover has a first dust filter. The second cover has a second dust filter. With the first and second covers installed on the motor, the cooling air generated by the operation of the blower flows from the outside of the motor through the second dust filter, the first dust filter, and the cooling air inlet in sequence into the inside of the motor.

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