Mounting structure of tractor state monitoring component

Abstract

An installation structure of a state monitoring component of a traction machine comprises a fixed component, a rotating component, a motor component and a monitoring component, the motor component comprises a rotor assembly and a stator assembly which are correspondingly arranged, the rotor assembly is installed on the rotating component, and the stator assembly is installed on the fixed component; the rotating part is rotatably supported on the fixed part through a first bearing and a second bearing, the monitoring part is an inductive encoder comprising an encoder stator and an encoder rotor, and a sensing part of the encoder stator and a sensed part of the encoder rotor are both of a surface structure and are arranged face to face; the encoder stator is directly or indirectly installed on a fixed part of the traction machine, and the encoder rotor is directly or indirectly installed on a rotating part of the traction machine. The traction machine has the advantages that the inductance type encoder is adopted as a monitoring component to monitor the motion condition of the motor rotor, split installation is adopted, the motor rotor does not need to be installed on an exposed rotating shaft, installation is flexible, space is saved, the thickness of the traction machine is reduced, and small-space installation is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of traction machines, and in particular relates to a mounting structure of a traction machine state monitoring component. Background Art

[0002] The encoder installed on the traction machine is used to detect the position and / or speed of the motor rotor. It is one of the indispensable and important components in the elevator control system. Common encoders include rotary encoders. The overall structure of the rotary encoder includes a rotating part and a fixed part. The rotating part is usually installed on the main shaft of the traction machine. When the rotating disk rotates, the photosensitive diode of the rotating part intermittently receives the light emitted by the light-emitting diode, thereby outputting a square wave. It is connected to the traction machine through a coupler, and the pulse wave output by the encoder per unit time is calculated to reflect the current speed and position changes of the traction machine. The rotary encoder has high precision and long service life, but because the rotary encoder is an integral structure, its rotating part and the fixed part are integrated into one, and the rotating part is usually installed on the main shaft of the traction machine, so if the main shaft of the traction machine is not visible, it is inconvenient to install the rotary encoder, which will inevitably increase the thickness of the traction machine and is not conducive to the spatial layout of the traction machine.

[0003] As the utilization rate of building space in the elevator industry is getting higher and higher, it is necessary to reduce the effective area occupied by the traction machine as much as possible. In many cases, the machine room-less installation is adopted. During installation, the traction machine is directly installed in the hoistway, requiring the traction machine to occupy the effective space of the hoistway as little as possible. This requires the thickness of the traction machine to be as small as possible and to be installed close to the hoistway wall so as not to affect the space between the counterweight and the car. The installation of the aforementioned rotary encoder does not have the advantage of saving space. In order to make the thickness of the traction machine thin enough, the technical personnel in this industry started from changing the installation structure of the photoelectric rotary encoder and developed to the latest contactless encoder, continuously reducing the thickness of the traction machine.

[0004] For example, China's invention patent authorization announcement number CN102648142B discloses a "measuring device, electric drive, elevator and elevator system", which specifically protects a detection device for a magnetic ring encoder. The magnetic ring encoder is a contactless encoder, specifically including a magnetic induction belt and a magnetic reader. The magnetic induction belt is attached to the rotating part of the motor, and the magnetic reader is installed on the driving pulley guard plate next to the magnetic induction belt. Although this detection device can improve the detection accuracy and reduce the axial size space, the magnetic induction belt will absorb dust and iron filings in the surrounding environment, resulting in higher protection requirements for the detection device. In addition, the magnetic ring encoder is expensive, and maintenance and even replacement work are cumbersome.

[0005] In view of the above-mentioned defects, it is necessary to reasonably improve the existing detection device of the rotor motion state of the traction machine. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0006] The task of the utility model is to provide an installation structure for a traction machine status monitoring component, which adopts an inductive encoder as a monitoring component to monitor the movement status of the motor rotor. It is installed separately and does not need to be installed on an exposed rotating shaft. The installation is flexible and space-saving. The thickness of the traction machine is greatly reduced, which is more conducive to installation in small spaces such as a machine room.

[0007] The task of the utility model is accomplished in this way. A mounting structure of a traction machine state monitoring component comprises a fixed component, a rotating component, a motor component and a monitoring component. The motor component comprises a rotor assembly and a stator assembly which are arranged correspondingly. The rotor assembly is mounted on the rotating component, and the stator assembly is mounted on the fixed component. The rotating component is rotatably supported on the fixed component through a first bearing and a second bearing. The monitoring component is characterized in that: the monitoring component is an inductive encoder comprising an encoder stator and an encoder rotor, the sensing part of the encoder stator and the sensed part of the encoder rotor are both surface structures and are arranged face to face with each other, the encoder stator is directly or indirectly mounted on the fixed component of the traction machine, and the encoder rotor is directly or indirectly mounted on the rotating component of the traction machine.

[0008] In a specific embodiment of the present invention, the fixing component includes a support member and a stator mounting seat, and a stator assembly is installed in a ring pattern on the circumferential surface of the stator mounting seat corresponding to the rotor assembly.

[0009] In another specific embodiment of the utility model, the rotating component includes a main shaft, a rotating body fixedly mounted on one end of the main shaft, a brake wheel and a traction wheel are installed on the radial outer edge of the rotating body, a supporting boss with an outer cylindrical surface coaxial with the rotation center is convexly provided in the middle part of the rotating body, the supporting boss is rotatably supported on the support member through a first bearing, and the other end of the main shaft is rotatably supported on the stator mounting seat through a second bearing.

[0010] In another specific embodiment of the utility model, the part from the axial inner end of the supporting boss of the rotating body to the traction wheel forms a concave cavity inside the rotating body which is concave axially inward, and the position of the supporting member corresponding to the concave cavity inside the rotating body also extends axially inward to form a sunken portion, and a supporting hole for supporting the outer ring of the first bearing is opened in the middle of the sunken portion.

[0011] In another specific embodiment of the present invention, a recessed inner cavity of the bracket is formed on the axial outer side of the sunken portion, and the inner cavity of the bracket is an inner cavity along the axis.

[0012] In another specific embodiment of the present invention, the encoder stator of the monitoring component is directly fixedly mounted on the sunken portion of the support, and the encoder rotor of the monitoring component is directly fixedly mounted on the supporting boss of the rotating body.

[0013] In a further specific embodiment of the present invention, the encoder stator of the monitoring component is fixedly mounted on a stator mounting plate on a support, and the encoder rotor of the monitoring component is fixedly mounted on a rotor mounting plate on a supporting boss, thereby achieving indirect mounting.

[0014] In a more specific embodiment of the present invention, the rotating component includes a rotating body, a brake wheel and a traction wheel are provided on the radial outer edge of the rotating body, an inner support hole is opened in the middle of the rotating body, an inner extension shaft extends from the middle of the fixed component into the inner support hole, and the inner support hole of the rotating body is rotatably supported on the inner extension shaft of the stator mounting seat through a first bearing and a second bearing.

[0015] In yet another specific embodiment of the present invention, the support member has a support body extending vertically toward the center of rotation, the encoder stator of the monitoring component is directly or indirectly fixed on the support body, and the encoder rotor of the monitoring component is directly or indirectly fixed on the end face of the middle part of the rotating component.

[0016] In yet another specific embodiment of the present invention, the outer surface of the monitoring component does not protrude from the side of the traction machine after installation, thereby not increasing the thickness of the traction machine.

[0017] The utility model has the following beneficial effects due to the adoption of the above structure: Advantage 1: the monitoring component adopts an inductive encoder, the sensing part and the sensed part of the inductive encoder are split flat sheet structures arranged face to face with each other, the encoder stator is installed on the fixed part of the traction machine, and the encoder rotor is installed on the rotating part of the traction machine. Compared with integral encoders such as rotary encoders and point sensors such as magnetic ring encoders, the detection gap between the encoder stator and the encoder rotor of the inductive encoder has low installation accuracy requirements, and even with certain installation deviations, it can maintain good stability and high detection accuracy. Therefore, a split installation is adopted, and it does not need to be installed on the visible rotating shaft. The installation is flexible, space is saved, the thickness of the traction machine is greatly reduced, and it is more conducive to installation in small spaces such as no machine room; Advantage 2: the inductive encoder has no enrichment effect on dust and iron filings in the surrounding environment, and can also adapt to harsh environments such as high temperature, high pressure, and high radiation, so it has low protection requirements and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an embodiment of the traction machine of the utility model;

[0019] Figure 2 It is a schematic diagram of another embodiment of the traction machine of the utility model;

[0020] Figure 3 It is a schematic diagram of another embodiment of the traction machine of the utility model.

[0021] In the figure: 1. fixed component, 11. support member, 111. sunken part, 1111. inner cavity of the bracket, 112. support body, 12. stator mounting seat, 121. inner extension shaft, 13. mounting cavity; 2. rotating component, 21. main shaft, 22. rotating body, 221. brake wheel, 2211. brake surface, 222. traction wheel, 223. support boss, 2231. axial inner end, 224. inner cavity of the rotating body, 225. inner support hole; 3. motor component, 31. rotor assembly, 32. stator assembly; 4. monitoring component, 41. encoder stator, 411. sensing part, 42. encoder rotor, 421. sensed part, 43. communication signal outlet, 44. stator mounting plate, 45. rotor mounting plate; 51. first bearing, 52. second bearing. DETAILED DESCRIPTION

[0022] The following description of the present invention in conjunction with the accompanying drawings, which is based on the concept of the present invention and is not based on the actual changes, should be regarded as the protection scope of the present invention.

[0023] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back are based on the positions shown in the corresponding drawings, and therefore cannot be understood as a special limitation on the technical solution provided by the utility model. Example 1

[0024] See also Figure 1 This embodiment relates to a mounting structure of a traction machine state monitoring component, comprising a fixed component 1, a rotating component 2, a motor component 3, and a monitoring component 4. The motor component 3 comprises a rotor assembly 31 and a stator assembly 32. The monitoring component 4 is used to monitor the working condition of the rotor assembly 31 in the motor component 3. The fixed component 1 comprises a supporting member 11 and a stator mounting seat 12 which are fixedly connected to each other. After the supporting member 11 and the stator mounting seat 12 are fixedly mounted to each other, a mounting cavity 13 for mounting the rotating component 2 and the motor component 3 is formed inside.

[0025] The rotating component 2 includes a main shaft 21, a rotating body 22 fixedly mounted on one end of the main shaft 21, a brake wheel 221 and a traction wheel 222 are provided on the radial outer edge of the rotating body 22, and a support boss 223 with an outer cylindrical surface coaxial with the rotation center is axially protruded in the middle part of the rotating body 22, and the support boss 223 is rotatably supported on the support member 11 through a first bearing 51, and the other end of the main shaft 21 is rotatably supported on the stator mounting seat 12 through a second bearing 52. Therefore, here, the rotating component 2 composed of the main shaft 21 and the rotating body 22 is supported on the fixed component 1 composed of the support member 11 and the stator mounting seat 12 through the first bearing 51 and the second bearing 52 respectively.

[0026] The portion from the axial inner end 2231 of the support boss 223 of the rotating body 22 to the traction wheel 222 forms a rotating body inner concave cavity 224 that is concave inwardly toward the axial inner side, and the rotating body inner concave cavity 224 is an inner concave cavity along the axis. The support member 11 also extends axially inwardly to form a sunken portion 111 corresponding to the position of the rotating body inner concave cavity 224, and the sunken portion 111 forms a recessed bracket inner concave cavity 1111 axially outwardly, and the bracket inner concave cavity 1111 is also an inner concave cavity along the axis. A support hole for supporting the outer ring of the first bearing 51 is provided in the middle of the sunken portion 111.

[0027] Furthermore, in this embodiment, the traction wheel 222 is integrally manufactured with the rotating body 22. The brake wheel 221 is also integrally manufactured with the rotating body 22, and the outer circumferential surface of the brake wheel 221 is a brake surface 2211, and the rotor assembly 31 is mounted in a ring pattern on the inner circumferential surface of the brake wheel 221. The stator assembly 32 is mounted in a ring pattern on the circumferential surface of the stator mounting seat 12 corresponding to the rotor assembly 31.

[0028] The monitoring component 4 adopts an inductive encoder, which is a surface sensor, specifically comprising an encoder stator 41 and an encoder rotor 42 arranged face to face with each other, the encoder stator 41 is a sensing component, the encoder rotor 42 is a sensed component, the sensing portion 411 of the encoder stator 41 and the sensed portion 421 of the encoder rotor 42 are both surface structures and are arranged face to face with each other, therefore, the monitoring component 4 is a surface sensor. A code disc reflector is arranged at the sensed portion 421 of the encoder rotor 42, which has a magnet inside, and an induction coil is arranged at the sensing portion 411 of the encoder stator 41 to form a sensing circuit, and a communication signal output line 43 for transmitting detection information to the control system is also arranged on the encoder stator 41.

[0029] The encoder stator 41 is directly mounted on the fixed component 1 of the traction machine, and the encoder rotor 42 is directly mounted on the rotating component 2 of the traction machine. Figure 1As shown, the encoder stator 41 is directly fixedly mounted on the sunken portion 111 of the support member 11. The encoder rotor 42 is directly fixedly mounted on the supporting boss 223 of the rotating body 22.

[0030] Please continue reading Figure 1 The working principle of the installation structure of the traction machine state monitoring component described in the utility model is: after the motor component 3 is energized, the stator component 32 forms an alternating magnetic field, and the magnetic poles of the magnetic steel in the rotor component 31 catch up with the alternating magnetic field of the stator component 32 to generate a torque. The rotation of the rotor component 31 drives the rotating body 22 to rotate, and the rotation of the rotating body 22 drives the main shaft 21 to rotate. The rotation of the main shaft 21 drives the encoder rotor 42 fixedly connected thereto to rotate. The rotation of the encoder rotor 42 changes the magnetic flux in the induction coil in the encoder stator 41, so that the induction coil generates a voltage signal. This voltage signal is read and decoded by the decoding circuit in the encoder stator 41 to determine the rotation status of the rotating body 22, so that the rotation status of the rotor component 31 is fed back to the control system of the elevator, which is beneficial to the control system's control of the traction machine. Example 2

[0031] like Figure 2 As shown, the difference between this embodiment and embodiment 1 is that the encoder stator 41 is indirectly mounted on the fixed component 1 on the traction machine, and the encoder rotor 42 is indirectly mounted on the rotating component 2 on the traction machine. For example, in this embodiment, the encoder stator 41 is fixedly mounted on the stator mounting plate 44 on the support 11, and the encoder rotor 42 is fixedly mounted on the rotor mounting plate 45 on the support boss 223, so as to realize indirect mounting, and the encoder stator 41 is mounted on the stator mounting component fixedly connected to the fixed component 1, and the encoder rotor 42 is mounted on the rotor mounting component fixedly connected to the rotating component 2. Other components and their relationships are the same as those in embodiment 1. Example 3

[0032] like Figure 3As shown, the difference between this embodiment and the embodiment 1 is that: the rotating component 2 has no main shaft 21, but only a rotating body 22, the radial outer edge of the rotating body 22 is provided with a brake wheel 221 and a traction wheel 222, the middle of the rotating body 22 is provided with a support boss 223, the middle of the support boss 223 is provided with an inner support hole 225, the middle of the fixed component 1 is provided with an inner extension shaft 121 extending into the inner support hole 225, the inner support hole 225 of the rotating body 22 is rotatably supported on the inner extension shaft 121 of the stator mounting seat 12 through the first bearing 51 and the second bearing 52, so here, the rotating component 2 composed of the rotating body 22 alone is rotatably supported on the fixed component 1 through the first bearing 51 and the second bearing 52. The support member 11 does not have a sunken portion 111 extending axially inwardly at the position corresponding to the inner cavity 224 of the rotating body, but has a support body 112 extending vertically to the rotation center. In this embodiment, the encoder stator 41 is directly fixedly mounted on the support body 112 of the support member 11, and the encoder rotor 42 is directly fixedly mounted on the end surface of the middle part of the rotating body 22, that is, the encoder stator 41 is directly fixedly mounted on the fixed component 1, and the encoder rotor 42 is directly fixedly mounted on the rotating component 2. Here, it is also possible that the encoder stator 41 is indirectly fixedly mounted on the support body 112, and the encoder rotor 42 is indirectly fixedly mounted on the end surface of the middle part of the rotating component 2. Other components and their mutual relationships are the same as those in Embodiment 1.

[0033] The above-mentioned support member 11 and stator mounting seat 12 may not be fixedly connected to each other, as long as the support member 11 plays a supporting role and the stator mounting seat 12 plays a role of supporting and mounting the stator assembly 32.

[0034] In summary, the traction machine described in the utility model is a thin traction machine, the rotating body 22 has a rotating body inner cavity 224, the support member 11 corresponds to the position of the rotating body inner cavity 224 and also extends axially inward to form a sunken portion 111, so that the sunken portion 111 has an inwardly sunken bracket inner cavity 1111 relative to the side of the traction machine, and the monitoring component 4 is located in the bracket inner cavity 1111, as described in Examples 1 and 2, or the monitoring component 4 is located in the space between the support body 112 and the supporting boss 223, as described in Example 3, to ensure that the outer surface of the monitoring component 4 after installation does not protrude from the side of the traction machine, thereby not increasing the thickness of the traction machine. In addition, the monitoring component 4 does not require high installation accuracy, making it easier to install than existing encoders.

Claims

1. A mounting structure for a traction machine state monitoring component, comprising a fixed component (1), a rotating component (2), a motor component (3), and a monitoring component (4), wherein the motor component (3) comprises a rotor assembly (31) and a stator assembly (32) arranged correspondingly, wherein the rotor assembly (31) is mounted on the rotating component (2), and the stator assembly (32) is mounted on the fixed component (1), and the rotating component (2) is rotatably supported on the fixed component (1) through a first bearing (51) and a second bearing (52), wherein: The monitoring component (4) is an inductive encoder including an encoder stator (41) and an encoder rotor (42); the sensing portion (411) of the encoder stator (41) and the sensed portion (421) of the encoder rotor (42) are both planar structures and are arranged face to face with each other; the encoder stator (41) is directly or indirectly mounted on the fixed component (1) of the traction machine; and the encoder rotor (42) is directly or indirectly mounted on the rotating component (2) of the traction machine.

2. The installation structure of a traction machine state monitoring component according to claim 1, characterized in that: The fixing component (1) comprises a support member (11) and a stator mounting seat (12), and a stator assembly (32) is mounted in a ring-shaped manner on the circumferential surface of the stator mounting seat (12) corresponding to the rotor assembly (31).

3. The installation structure of a traction machine state monitoring component according to claim 2, characterized in that: The rotating component (2) comprises a main shaft (21), a rotating body (22) fixedly sleeved on one end of the main shaft (21), a brake wheel (221) and a traction wheel (222) being mounted on the radial outer edge of the rotating body (22), a supporting boss (223) having an outer cylindrical surface coaxial with the rotation center being convexly arranged in the middle of the rotating body (22), the supporting boss (223) being rotatably supported on the support member (11) via a first bearing (51), and the other end of the main shaft (21) being rotatably supported on the stator mounting seat (12) via a second bearing (52).

4. The installation structure of a traction machine state monitoring component according to claim 3, characterized in that: The portion from the axial inner end (2231) of the support boss (223) of the rotating body (22) to the traction wheel (222) forms a rotating body inner concave cavity (224) that is concave axially inward, and the support member (11) also extends axially inward at a position corresponding to the rotating body inner concave cavity (224) to form a sunken portion (111), and a supporting hole for supporting the outer ring of the first bearing (51) is provided in the middle of the sunken portion (111).

5. The installation structure of a traction machine state monitoring component according to claim 4, characterized in that: A recessed bracket inner cavity (1111) is formed axially outwardly of the sunken portion (111), and the bracket inner cavity (1111) is an inner cavity that is arranged along the axis.

6. The installation structure of a traction machine state monitoring component according to claim 4, characterized in that: The encoder stator (41) of the monitoring component (4) is directly fixedly mounted on the sunken portion (111) of the support member (11), and the encoder rotor (42) of the monitoring component (4) is directly fixedly mounted on the supporting boss (223) of the rotating body (22).

7. The installation structure of a traction machine state monitoring component according to claim 4, characterized in that: The encoder stator (41) of the monitoring component (4) is fixedly mounted on a stator mounting plate (44) on the support member (11), and the encoder rotor (42) of the monitoring component (4) is fixedly mounted on a rotor mounting plate (45) on the support boss (223), thereby achieving indirect mounting.

8. The installation structure of a traction machine state monitoring component according to claim 2, characterized in that: The rotating component (2) comprises a rotating body (22), a braking wheel (221) and a traction wheel (222) are arranged at the radial outer edge of the rotating body (22), an inner supporting hole (225) is opened in the middle of the rotating body (22), an inner extending shaft (121) extends from the middle of the fixed component (1) into the inner supporting hole (225), and the inner supporting hole (225) of the rotating body (22) is rotatably supported on the inner extending shaft (121) of the stator mounting seat (12) through a first bearing (51) and a second bearing (52).

9. The installation structure of a traction machine state monitoring component according to claim 8, characterized in that: The support member (11) has a support body (112) extending vertically toward the center of rotation, the encoder stator (41) of the monitoring component (4) is directly or indirectly fixedly mounted on the support body (112), and the encoder rotor (42) of the monitoring component (4) is directly or indirectly fixedly mounted on the end face of the middle portion of the rotating component (2).

10. A mounting structure for a traction machine state monitoring component according to any one of claims 6, 7 or 9, characterized in that: After installation, the outer surface of the monitoring component (4) does not protrude from the side of the traction machine, thereby not increasing the thickness of the traction machine.

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