Traction machine

Abstract

The invention relates to the technical field of traction wheels, in particular to a traction machine. Comprising a machine base, a brake arranged on one side of the machine base, a rotor arranged in the machine base, a traction wheel arranged at one end of the rotor and a plurality of junction boxes arranged on one side of the brake. An anti-friction embedded shaft is arranged between the friction disc at the tail end of the rotating shaft and the brake; the rotor and the rotating shaft are integrally formed; a plurality of limiting pieces are arranged between the anti-friction embedded shaft and the friction disc, and the tail ends of the limiting pieces abut against the friction disc; and the friction disc and the brake are not in contact with each other. The traction machine has the advantages of being good in stability and reliability, long in service life, small in assembly error, high in precision, low in maintenance cost, wide in application range, convenient to disassemble and assemble and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of traction machines, and in particular to a traction machine. Background Art

[0002] Permanent magnet synchronous traction machines are the elevator's power unit, installed in the elevator machine room or hoistway. They are generally categorized as machine-room-based or machine-room-less, depending on the installation location. However, when retrofitting elevators in older buildings or requiring high building height, machine-room-based traction machines are insufficient. Machine-room-less traction machines, with their excellent architectural adaptability and design flexibility, offer greater design freedom to elevator civil engineers.

[0003] Defects and shortcomings of existing technologies: Installation space limitations: Traditional traction machines are large in size and require additional shaft space, which limits the flexibility of building design; Poor center of gravity stability: The outer rotor structure causes the center of gravity to tilt forward under suspended loads, exacerbating bearing wear.

[0004] Chinese patent CN206069165U discloses a horizontal elevator traction machine, comprising a machine base, a main shaft, a front bearing, a rear bearing, a traction sheave, a friction disc, a brake disc, a brake, a rotor, and a stator. The brake disc is mounted on the machine base, the main shaft is transversely arranged at the center of the brake disc and extends to the front end of the brake disc, the brake is mounted on the main shaft and located at the front end of the brake disc, the friction disc is disposed between the brake and the brake disc, the front bearing, the rear bearing, the traction sheave, and the rotor are all mounted on the main shaft and located inside the brake disc, the rotor is a horizontal structure mounted on the rear end of the main shaft, and the stator is mounted on the rotor. The horizontal elevator traction machine of the utility model operates more smoothly. The horizontal traction machine adopts an integrated design, has a compact structure, a small size, a large aspect ratio, saves hoistway space, is easy to install, and saves construction costs, making it suitable for household elevators.

[0005] However, the direct contact between the brake disc and the brake in this technical solution will lead to faster wear and a short service life of the brake disc, which in turn leads to a short service life of the traction machine, requiring regular replacement and high maintenance costs; and direct contact is prone to noise, affecting use. Summary of the Invention

[0006] The purpose of the present invention is to address the shortcomings of the existing technology and provide a traction machine that prevents direct contact between the friction disc and the brake by installing an anti-friction inlaid shaft between the friction disc and the brake, thereby reducing wear, improving the operating effect of the brake, extending the service life of the brake and the friction disc, and reducing the noise and heat generated by wear.

[0007] To achieve the above object, the present invention provides the following technical solutions: A traction machine includes: a machine base, a brake arranged on one side of the machine base, a rotor arranged inside the machine base, a traction wheel arranged at one end of the rotor, and several terminal boxes arranged on one side of the brake. A rotating shaft is fixedly connected to the inside of the rotor, and an anti-friction inlaid shaft is arranged between the friction disk at the end of the rotating shaft and the brake.

[0008] Preferably, the rotor and the rotating shaft are integrally formed.

[0009] Preferably, a plurality of limiting members are provided between the anti-friction inlaid shaft and the friction disc, and the ends of the limiting members abut against the friction disc.

[0010] Preferably, the friction disc and the brake do not contact each other.

[0011] Preferably, a gear ring is provided between the friction disc and the rotating shaft, and the gear ring and the anti-friction inlaid shaft do not interfere with each other.

[0012] Preferably, the anti-friction inlaid shaft is provided between the encoder in the middle of the brake and the rotating shaft.

[0013] Preferably, the protrusion of the encoder is matched with the groove inside the anti-scratch inlaid shaft, and the protrusion and the anti-scratch inlaid shaft are fixedly connected by a fastener.

[0014] Preferably, the groove is tapered as a whole.

[0015] Preferably, the rotating shaft is hollow, and one end of the anti-scratch inlaid shaft is embedded in the rotating shaft.

[0016] Preferably, the junction box is side-mounted and fixedly connected to both sides of the base.

[0017] The beneficial effects of the present invention are: (1) The present invention installs a friction disc at the end of the rotating shaft so that the brake can effectively act on the rotating shaft, thereby achieving fast and reliable braking. Due to the presence of the anti-friction inlaid shaft, the friction disc and the brake do not contact each other, that is, there is a gap between the two, which can reduce the wear between the brake and the friction disc, thereby extending the service life of both, and also reducing the noise and heat generated by contact, thereby improving the reliability and performance of the braking system.

[0018] (2) The present invention provides a plurality of limit members between the anti-friction inlaid shaft and the friction disc, and the ends of the limit members abut against the friction disc. The limit members can limit the movement of the anti-friction inlaid shaft, ensure its stability during operation, prevent the anti-friction inlaid shaft from being displaced during operation, and effectively avoid the friction disc from scratching the brake surface during operation, thereby ensuring the normal operation of the braking system.

[0019] (3) The present invention can reduce or eliminate the assembly errors of the traditional split design by forming the rotor and the shaft into one piece, thereby improving the processing accuracy and ensuring the concentricity of the rotor and the shaft during operation, thereby reducing vibration and noise. The one-piece molding design reduces the number of assembly parts, improves the overall structural strength and reliability, compresses the size of the traction machine, and reduces the cross-sectional area requirement of the shaft, making it suitable for the renovation of old buildings.

[0020] (4) The present invention provides a ring gear between the friction disc and the rotating shaft, because the ring gear can effectively transmit the torque of the rotating shaft to the friction disc, ensuring stable and reliable power transmission between the two, thereby ensuring the smooth operation of the rotor; the design of the ring gear increases the connection strength between the friction disc and the rotating shaft, reduces loosening or damage caused by high torque or high speed operation, and can reduce direct contact between the friction disc and the rotating shaft, thereby reducing wear, thereby extending the service life of the friction disc and the rotating shaft and reducing maintenance costs.

[0021] (5) The present invention ensures the precise connection between the encoder and the rotating shaft by fitting the protrusion of the encoder with the groove inside the anti-scratch inlaid shaft, thereby improving the installation accuracy and stability of the encoder. The fitting of the groove and the protrusion can reduce the vibration of the encoder during operation and improve its measurement accuracy. The groove is tapered as a whole, that is, the encoder and the anti-scratch inlaid shaft adopt a taper fit, which can better adapt to the protrusion of the encoder, ensure a close fit between the two, improve the installation accuracy and stability of the encoder, and reduce the looseness caused by vibration. In summary, the present invention has the advantages of good stability and reliability, long service life, small assembly error, high precision, low maintenance cost, wide application range and easy assembly and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention when facing the brake; Figure 2 This is a schematic diagram of the overall structure of the present invention when facing the traction sheave; Figure 3 is a cross-sectional view of the present invention; Figure 4 for Figure 3 Enlarged view of point A. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] Example like Figures 1-4 As shown, this embodiment provides a traction machine, comprising: a machine base 1, a brake 2 arranged on one side of the machine base 1, a rotor 3 arranged inside the machine base 1, a traction wheel 4 arranged at one end of the rotor 3, and a plurality of terminal boxes 5 arranged on one side of the brake 2. The interior of the rotor 3 is fixedly connected to a rotating shaft 31, ensuring a tight connection between the rotor 3 and the rotating shaft 31, thereby improving the overall structural strength and stability; a friction disc 32 is provided at the end of the rotating shaft 31, ensuring that the brake 2 can effectively act on the rotating shaft 31 to achieve fast and reliable braking; an anti-friction inlaid shaft 33 is provided between the friction disc 32 and the brake 2, which can prevent direct contact between the friction disc 32 and the brake 2, reduce wear, improve the operating effect of the brake 2, extend the service life of the brake 2 and the friction disc 32, and reduce noise and heat generated by wear.

[0026] Among them, the rotor 3 and the rotating shaft 31 are integrally formed, which can reduce or eliminate the assembly error of the traditional split design, improve the processing accuracy, ensure the concentricity of the rotor 3 and the rotating shaft 31 during operation, thereby reducing vibration and noise. The one-piece molding design reduces the number of assembly parts, improves the overall structural strength and reliability, compresses the size of the traction machine, and reduces the cross-sectional area requirement of the shaft, which is suitable for the renovation of old buildings.

[0027] At the same time, a number of limit members 34 are provided between the anti-scratch inlaid shaft 33 and the friction disc 32. The ends of the limit members 34 abut against the friction disc 32, that is, the friction disc 32 is adjustable. The limit members 34 can limit the movement of the anti-scratch inlaid shaft 33, ensure its stability during operation, and prevent the anti-scratch inlaid shaft 33 from being displaced during operation, thereby ensuring the normal operation of the braking system.

[0028] The limiting member 34 can preferably be a bolt, one end of which is threadedly connected to the anti-friction inlaid shaft 33, and the other end abuts against the surface of the friction disk 32. The other end of the bolt is fixed to the anti-friction inlaid shaft 33 by a nut. The bolt has a good fixing effect, a simple structure, and is easy to disassemble and assemble.

[0029] In the present invention, the friction disc 32 and the brake 2 do not contact each other, that is, a gap is left between the two, which can reduce the wear between the brake 2 and the friction disc 32, thereby extending the service life of both, and also reduce the noise and heat generated by contact, thereby improving the reliability and performance of the braking system. By designing the adjustable gap of the friction disc 32 inside the traction machine, it can effectively prevent the friction disc 32 from scratching against the surface of the brake 2 during operation.

[0030] In the present invention, a ring gear 35 is provided between the friction disc 32 and the rotating shaft 31. The ring gear 35 can effectively transmit the torque of the rotating shaft 31 to the friction disc 32, ensuring stable and reliable power transmission between the two, thereby ensuring the smooth operation of the rotor 3; the design of the ring gear 35 increases the connection strength between the friction disc 32 and the rotating shaft 31, reduces loosening or damage caused by high torque or high speed operation, and can reduce direct contact between the friction disc 32 and the rotating shaft 31, thereby reducing wear, thereby extending the service life of the friction disc 32 and the rotating shaft 31, and reducing maintenance costs; the ring gear 35 can ensure precise alignment between the friction disc 32 and the rotating shaft 31, thereby improving the overall operation accuracy.

[0031] In the present invention, the rotating shaft 31 is embedded with the ring gear 35 , which can eliminate the steps of independent processing, heat treatment, and assembly of the ring gear 35 , reduce multiple working steps, shorten working hours, and ensure assembly efficiency.

[0032] In the present invention, the ring gear 35 and the anti-scratch inlaid shaft 33 do not interfere with each other, and direct contact between the two can be avoided, thereby reducing friction and wear, extending the service life of the ring gear 35 and the anti-scratch inlaid shaft 33, improving operating efficiency, and thus improving the reliability of the entire traction machine.

[0033] In the present invention, the ring gear 35 can preferably be a spline sleeve, which is mounted on the rotating shaft 31. The spline sleeve has a high torque transmission capability and can withstand a large load. It is suitable for traction machines that require high torque transmission to ensure the stable operation of the rotor 3; and the spline sleeve can ensure the precise alignment between the friction plate 32 and the rotating shaft 31, thereby improving the overall operating accuracy.

[0034] In the present invention, the anti-scratch inlaid shaft 33 is provided between the encoder 21 in the middle of the brake 2 and the rotating shaft 31. The encoder 21 is used to detect the rotation position and speed of the rotating shaft 31 and provide accurate feedback information for the elevator control system. The anti-scratch inlaid shaft 33 can prevent direct contact between the encoder 21 and the rotating shaft 31, reduce wear, thereby extending the service life of the encoder 21 and the rotating shaft 31, and reducing the noise and heat generated by wear.

[0035] In the present invention, the protrusion 22 of the encoder 21 is adapted to the groove 36 inside the anti-scratch inlaid shaft 33, ensuring the precise connection between the encoder 21 and the rotating shaft 31, improving the installation accuracy and stability of the encoder 21, and the cooperation between the groove 36 and the protrusion 22 can reduce the vibration of the encoder 21 during operation and improve its measurement accuracy; the anti-scratch inlaid shaft 33 preferably adopts an adjustable tapered hole type.

[0036] In the present invention, the protrusion 22 is fixedly connected to the anti-scratch inlaid shaft 33 by a fastener 37. The groove 36 is divided into two parts, one side is conical for installing the protrusion 22, and the other side is through-shaped for installing the fastener 37. The fastener 37 is preferably a bolt, which has a simple structure and is easy to disassemble and assemble.

[0037] In the present invention, the groove 36 is tapered as a whole, that is, the encoder 21 and the anti-friction inlaid shaft 33 are matched with each other in a taper, which can better adapt to the protrusion 22 of the encoder 21, ensure a close fit between the two, improve the installation accuracy and stability of the encoder 21, and reduce the looseness caused by vibration. It is further preferred that the taper ratio is 1:10 to ensure that the concentricity error is ≤0.02mm, thereby ensuring the stability of the traction machine during operation.

[0038] In the present invention, the rotating shaft 31 is hollow, and one end of the anti-friction inlaid shaft 33 is embedded in the rotating shaft 31. The hollow rotating shaft 31 can reduce the overall weight of the traction machine, while providing sufficient space for the anti-friction inlaid shaft 33, thereby improving the operating efficiency of the traction machine and reducing energy consumption.

[0039] In the present invention, the junction box 5 is side-mounted and fixedly connected to both sides of the machine base 1, which can significantly reduce the height of the traction machine, reduce the radial width, and can be flexibly arranged, avoiding the restrictions of the traditional junction box 5 on the shaft height, and is suitable for narrow shafts. At the same time, it optimizes the cable layout and maintenance convenience, which is easy to install and maintain, and improves the convenience and reliability of wiring; it also reduces the occupation of the internal space of the traction machine by the junction box 5, and improves the overall compactness.

[0040] Of course, the side-mounted junction box 5 provides two installation directions, and customers can choose according to actual needs: Right-mounted type: When facing the traction sheave 4, the junction box 5 is located on the right side of the machine base 1, and the nameplate is installed on the right side simultaneously; Left-mounted type: When facing the traction sheave 4 end, the junction box 5 is located on the left side of the machine base 1, and the nameplate is installed on the left side simultaneously.

[0041] In addition, rope stop rods 41 are respectively provided on both sides of the traction sheave 4 to prevent the wire rope from falling out of the groove during the operation of the traction sheave 4, that is, to limit the lateral movement of the wire rope, ensure that the wire rope always runs in the groove of the traction sheave 4, improve the operating stability of the traction sheave 4 and the wire rope, and reduce vibration and noise; the rope stop rod 41 is fixedly connected to the machine base 1 by a number of bolts to ensure that the rope stop rod 41 will not be offset; the rope stop rod 41 is L-shaped, one section of which is flush with the surface of the machine base 1 and does not contact the rotor 3 to avoid interference, and the other section is arranged opposite to the traction sheave 4. The length of this section needs to exceed the thickness of the traction sheave 4 to further ensure that the wire rope will not fall out of the groove.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A traction machine, characterized in that: include: A machine base, a brake arranged on one side of the machine base, a rotor arranged inside the machine base, a traction wheel arranged at one end of the rotor, and several terminal boxes arranged on one side of the brake. A rotating shaft is fixedly connected to the inside of the rotor, and an anti-friction inlaid shaft is arranged between the friction disk at the end of the rotating shaft and the brake.

2. A traction machine according to claim 1, characterized in that: The rotor and the rotating shaft are integrally formed.

3. The traction machine according to claim 1, characterized in that: A plurality of limiting members are provided between the anti-friction inlaid shaft and the friction disc, and the ends of the limiting members abut against the friction disc.

4. The traction machine according to claim 1, characterized in that: The friction disc and the brake do not contact each other.

5. The traction machine according to claim 1, characterized in that: A gear ring is provided between the friction disc and the rotating shaft, and the gear ring and the anti-friction inlaid shaft do not interfere with each other.

6. The traction machine according to claim 1, characterized in that: The anti-friction inlaid shaft is arranged between the encoder in the middle of the brake and the rotating shaft.

7. The traction machine according to claim 6, characterized in that: The protrusion of the encoder is matched with the groove inside the anti-scratch inlaid shaft, and the protrusion and the anti-scratch inlaid shaft are fixedly connected by a fastener.

8. The traction machine according to claim 7, characterized in that: The groove is tapered as a whole.

9. The traction machine according to claim 1, characterized in that: The rotating shaft is hollow, and one end of the anti-scratch inlaid shaft is embedded in the rotating shaft.

10. The traction machine according to claim 1, characterized in that: The junction box is side-mounted and fixedly connected to both sides of the base.

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