A main motor device of an elevator

Abstract

The utility model provides a kind of host power device of elevator, including driving part, wheel disc, the driving part drives wheel disc rotation, its both sides are equipped with the wheel disc of symmetrical arrangement, wheel disc is used to wind steel band, the outer side of wheel disc is equipped with the winding portion of winding steel band, winding portion is spiral line camber, the pitch of spiral line camber is equal with steel band thickness.The utility model structure is simple, it is convenient to repair maintenance, and through setting up the winding wheel disc of spiral line camber avoids the elevator operation jitter caused by winding mutation, improves the stability and comfort of ladder operation.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to a main power unit for an elevator. Background Technology

[0002] Elevators primarily achieve vertical transportation through a main drive system, which uses steel belts or wire ropes to move the car up and down. In some low-rise residential elevators or commercial spaces where low noise is required, steel belts are generally used as the suspension device.

[0003] Currently, one end of the steel belt is typically wound around the main shaft, while the other end connects to the car. The winding of the steel belts is concentrated on one side of the main shaft, and the spacing between the belts is small, which is detrimental to the assembly and disassembly of the belts. Furthermore, the main shaft is a standard circle, and its position or structure for fixing the end of the steel belt has abrupt changes, such as… Figure 1 As shown, when the steel strip is wound around it, some non-smooth transitions will occur due to the sudden change in radius. After the elevator is running, these non-smooth transitions will cause the elevator to vibrate during operation, affecting the stability of the elevator. Utility Model Content

[0004] The present invention aims to provide a main power unit for an elevator to overcome the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a main power unit for an elevator, including a drive component and a wheel. The drive component drives the wheel to rotate. The wheel is symmetrically arranged on both sides. The wheel is used to wind a steel strip. The outer side of the wheel is provided with a winding part for winding the steel strip. The winding part is a spiral curved surface. The pitch of the spiral curved surface is equal to the thickness of the steel strip.

[0006] Furthermore, the aforementioned elevator's main power unit also includes a main shaft, the middle of which is connected to the output end of the drive component, with wheel disks fixedly connected to both ends therefrom. Preferably, the wheel disks are fixedly connected to the main shaft via keys.

[0007] Furthermore, in the aforementioned elevator's main power unit, the driving component includes a gearbox and a servo motor, with the servo motor positioned above the gearbox and the gearbox fixed to the drive base.

[0008] Furthermore, in the aforementioned elevator main power unit, the wheel includes a wheel body and a pressure plate. The wheel body has a flat opening on its exterior, and the pressure plate is embedded in the flat opening and detachably connected to the wheel body. The outer side of the pressure plate and the outer side of the wheel body are both curved surfaces, forming a winding section. A pressing groove is provided between the pressure plate and the flat opening on the exterior of the wheel body. One end of the steel strip is located in the pressing groove and is fixedly connected to the wheel by pressing with the pressure plate.

[0009] Furthermore, in the aforementioned elevator main power unit, the connection point between the flat opening side and the winding part is the starting point of the steel strip winding on the winding part. The starting point of winding is provided with a rounded corner that transitions with the arc of the winding part, and the radius of the rounded corner is greater than the minimum bending radius of the steel strip.

[0010] Furthermore, in the aforementioned elevator's main power unit, two opposing baffles are provided on both sides of the wheel, with the two baffles protruding from the winding portion to form a limiting space for winding the steel strip. Preferably, the wheel body has grooves on both sides, and the baffles are annular, fitted outside the grooves. The baffles are fixedly connected to the wheel body by fasteners passing through the wheel body and the two baffles.

[0011] Furthermore, in the aforementioned elevator main power unit, the inner side of the baffle is provided with a U-shaped pressure groove that is opposite to the flat opening. The bottom of the U-shaped pressure groove is an arc shape that matches the outer curved surface of the pressure plate. Both ends of the pressure plate extend into the U-shaped pressure grooves of the two baffles.

[0012] Furthermore, in the aforementioned elevator main power unit, the winding portion of the wheel is manufactured by wire cutting.

[0013] Furthermore, the main power unit of the elevator mentioned above also includes a guide wheel corresponding to the wheel disc. The axis of the guide wheel is parallel to the axis of the wheel disc. The guide wheel is located diagonally above the wheel disc and is fixed to the drive unit by a wheel seat. The steel belt wound on the wheel disc is led out towards the car after passing through the guide wheel.

[0014] Furthermore, in the aforementioned elevator's main power unit, the shaft ends of the main power unit are provided with supporting bearing seats.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the utility model has a simple structure, is easy to repair and maintain, and is equipped with a spiral curved surface winding wheel to prevent sudden changes in the winding radius of the steel strip, avoid elevator running vibration caused by sudden changes in winding, and improve the stability and comfort of elevator operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of existing winding technology; Figure 2This is a schematic diagram of the main power unit of an elevator according to an embodiment of the present invention. Figure 3 This is a partial structural schematic diagram of the main power unit of the elevator of this utility model; Figure 4 This is a partial exploded structural diagram of the main power unit of the elevator of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the wheel disc of the main power unit of the elevator of this utility model; Figure 6 This is a schematic diagram of the wheel winding structure of the main power unit of the elevator of this utility model; Figure 7 This is a schematic diagram of the main power unit of an elevator according to another embodiment of the present invention; In the diagram: 1. Drive unit; 11. Gearbox; 12. Servo motor; 2. Wheel; 21. Winding section; 22. Wheel body; 221. Flat opening; 222. Rounded corner; 23. Pressure plate; 24. Baffle; 241. U-shaped pressing groove; 25. Pressing groove; 3. Main shaft; 4. Support bearing housing; 5. Guide wheel; 51. Wheel seat; 6. Steel strip. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1 like Figure 2-6 As shown, a main power unit for an elevator includes a drive component 1, a wheel 2, and a main shaft 3. The drive component 1 drives the main shaft 3 and the wheel 2 to rotate. The wheel 2 is symmetrically arranged on both sides of the drive component 1. The drive component 1 includes a reduction gearbox 11 and a servo motor 12. The servo motor 12 is positioned above the reduction gearbox 11, which is fixed to a drive base. In this embodiment, the reduction gearbox 11 is a gear reducer, which can increase the output torque and achieve stable, low-noise elevator lifting.

[0020] The main shaft 3 is connected to the output end of the drive unit 1 in the middle, and wheel discs 2 are fixedly connected to both ends of the shaft. Specifically, the wheel discs 2 are fixedly connected to the main shaft 3 by keys, which is simple and convenient to install, but it is not limited to this. It can also be connected by pins, fasteners, etc. The wheel discs 2 are located at both ends of the drive unit 1 and the main shaft 3, which makes the structure of the main power unit more stable and facilitates the disassembly and assembly of the wheel discs, which is beneficial for later maintenance.

[0021] The wheel 2 is used to wind the steel strip 6. The outer side of the wheel 2 is provided with a winding part 21 for winding the steel strip 6. The winding part 21 is a spiral curved surface. The pitch of the spiral curved surface is equal to the thickness of the steel strip 6.

[0022] A vortex is a curve that unfolds in a spiral pattern within a plane. It typically rotates around a central point and gradually moves away from the center as the angle of rotation increases, exhibiting a gradually spreading trend in its shape. The distance of any point on the vortex relative to the center point is: r = r0 + (P / 360) * θ Among them, such as Figure 4 As shown, r0 is the distance between the starting point and the center point, P is the pitch, and θ is the cumulative rotation angle. The pitch P is taken to be equal to the steel strip thickness. Figure 4 The double-dotted line represents a circle with radius r0. The spiral surface of the winding section gradually moves away from the center point as the rotation angle increases, and the distance between it and the circle with radius r0 gradually increases. In this embodiment, the steel strip is 3mm, i.e., P=3mm. When the steel strip returns to the starting point after one turn, its radius r=r0+P, that is, the radius r is exactly 3mm larger than the steel strip wound in the first layer. At this time, continuing to wind the steel strip for the second turn will not result in any sudden change in the radius value. Regardless of how many layers are wound, the radius change of all steel strip windings follows the above formula, which is a linear gradual value without sudden changes, avoiding elevator shaking and ensuring stable elevator operation.

[0023] The main power unit of this utility model has a compact structure, occupies little space, is easy to disassemble and assemble, and is convenient for later maintenance; it can also maximize the outer diameter of the wheel, and correspondingly increase the outer diameter of the steel belt winding, thereby reducing steel belt wear and fatigue damage, and extending the service life of the steel belt.

[0024] like Figure 3-6 As shown, the roulette wheel 2 includes a roulette wheel body 22 and a pressure plate 23. The roulette wheel body 22 has a flat opening 221 on its outside. The pressure plate 23 is inlaid in the flat opening 221 and is detachably connected to the roulette wheel body 22. The outer side of the pressure plate 23 and the outer side of the roulette wheel body 22 are both curved surfaces, forming a winding part 21. A pressing groove 25 is provided between the pressure plate 23 and the flat opening 221 on the outside of the roulette wheel body 22. One end of the steel strip 6 is located in the pressing groove 25 and is fixedly connected to the roulette wheel 2 by pressing with the pressure plate 23.

[0025] like Figure 5-6 As shown, the connection point between the flat opening 221 and the winding section 21 is the starting point of the steel strip 6 winding on the winding section 21. The starting point has a rounded corner 222 that transitions smoothly with the winding section 21, and the radius of the rounded corner 222 is greater than the minimum bending radius of the steel strip 6. The steel strip 6 is wound on the wheel 2. Compared to directly winding it on the main shaft 3, the outer diameter of the winding is increased. In this embodiment, the ratio of the outer diameter of the wheel 2 to the outer diameter of the main shaft 3 is greater than 2:1, meaning the outer diameter of the wheel 2 is greater than twice the outer diameter of the main shaft 3. This increased outer diameter reduces the restriction on the bending radius of the steel strip, expanding its usability. Furthermore, the increased outer diameter allows for a corresponding increase in the radius of the rounded corner 222 at the starting point of the winding on the wheel 2, making this radius greater than the minimum bending radius of the steel strip. This avoids the steel strip bulging caused by a large bending angle during the initial winding, improving the stability and comfort of the elevator operation. In addition, the increased outer diameter also increases the lifting speed of the steel strip, thereby increasing the elevator's lifting speed.

[0026] like Figure 3-4 As shown, in order to prevent the steel belt from deviating during the lifting and lowering of the car, two baffles 24 are provided on both sides of the wheel 2. The two baffles 24 protrude from the winding part 21, forming a limiting space for winding the steel belt 6, providing guidance and limiting for the winding of the steel belt 3, preventing the steel belt from deviating during operation, and effectively ensuring the stability and smooth winding of the steel belt 6.

[0027] The main body 22 of the wheel has grooves on both sides, and the baffle 24 is annular and is fitted outside the grooves. The baffle 24 is fixedly connected to the main body 22 of the wheel by fasteners passing through the main body 22 of the wheel and the two baffles 24. The installation is simple and convenient, and can ensure the strength and stability of the overall structure of the wheel 2.

[0028] In addition, such as Figure 3-4 As shown, the inner side of the baffle 24 is provided with a U-shaped pressure groove 241 opposite to the flat opening 221. The bottom of the U-shaped pressure groove 241 is an arc shape that matches the outer curved surface of the pressure plate 23. Both ends of the pressure plate 23 extend into the U-shaped pressure grooves 241 of the two baffles 24. By setting the U-shaped pressure groove 241, the pressing strength of the pressure plate 23 on the steel strip 6 can be improved, ensuring the stability of the connection between the steel strip 6 and the wheel 2.

[0029] like Figure 2 As shown, the main power unit of the elevator also includes a guide wheel 5 corresponding to the wheel 2. The guide wheel 5 is provided with a limiting annular groove. The axis of the guide wheel 5 is parallel to the axis of the wheel 2. The guide wheel 5 is located diagonally above the wheel 2 and is fixed to the drive unit 1 by the wheel seat 51. The steel belt 6 wound on the wheel 2 is led out towards the car after passing through the guide wheel 5, limiting the position of the steel belt and ensuring smooth operation of the steel belt.

[0030] The winding portion 21 of the wheel 2 of this utility model is manufactured by wire cutting. The specific manufacturing method includes the following steps: S1, wire cutting the spiral curved surface of the winding portion 21; S2, wire cutting the pressing groove 25, cutting the wheel 2 into the wheel body 22 and the pressure plate 23. Since the curved surface cannot be machined by turning, it requires four-axis or five-axis CNC machining, which is difficult and costly. Compared with four-axis or five-axis CNC machining, wire cutting greatly reduces the manufacturing difficulty, reduces the manufacturing cost, improves the feasibility of the process, and is conducive to implementation and application.

[0031] Example 2 Based on the structure of Example 1, such as Figure 7 As shown, the shaft ends of the main shaft 3 are provided with support bearing seats 4. By setting the support bearing seats 4, the load on the main shaft can be reduced and the rotational stability of the wheel can be improved.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A main power unit for an elevator, characterized in that: It includes a drive component and a wheel. The drive component drives the wheel to rotate. The wheel is symmetrically arranged on both sides. The wheel is used to wind a steel strip. The outer side of the wheel is provided with a winding part for winding the steel strip. The winding part is a spiral curved surface. The pitch of the spiral curved surface is equal to the thickness of the steel strip.

2. The main power unit of the elevator according to claim 1, characterized in that: It also includes a main shaft, the middle of which is connected to the output end of the drive component, and two wheels fixedly connected to it are fitted at both ends.

3. The main power unit of the elevator according to claim 1, characterized in that: The drive unit includes a gearbox and a servo motor. The servo motor is located above the gearbox, and the gearbox is fixed on the drive base.

4. The main power unit of the elevator according to claim 1, characterized in that: The wheel includes a wheel body and a pressure plate. The wheel body has a flat opening on its exterior. The pressure plate is inlaid in the flat opening and is detachably connected to the wheel body. The outer side of the pressure plate and the outer side of the wheel body are both curved surfaces, forming a winding section. A pressing groove is provided between the pressure plate and the flat opening on the exterior of the wheel body. One end of the steel strip is located in the pressing groove and is fixedly connected to the wheel by pressing with the pressure plate.

5. The main power unit of the elevator according to claim 4, characterized in that: The connection point between the flat end and the winding section is the starting point of the steel strip winding on the winding section. The starting point of the winding section has a rounded corner that transitions with the arc of the winding section. The radius of the rounded corner is greater than the minimum bending radius of the steel strip.

6. The main power unit of the elevator according to claim 1 or 4, characterized in that: The wheel has two opposing baffles on both sides, which protrude from the winding part to form a limiting space for winding the steel strip.

7. The main power unit of the elevator according to claim 6, characterized in that: The inner side of the baffle is provided with a U-shaped pressure groove that is opposite to the flat opening. The bottom of the U-shaped pressure groove is an arc shape that matches the outer curved surface of the pressure plate. Both ends of the pressure plate extend into the U-shaped pressure grooves of the two baffles.

8. The main power unit of the elevator according to claim 1, characterized in that: The winding portion of the wheel is manufactured by wire cutting.

9. The main power unit of the elevator according to claim 1, characterized in that: It also includes a guide wheel corresponding to the wheel. The axis of the guide wheel is parallel to the axis of the wheel. The guide wheel is located diagonally above the wheel and is fixed to the drive unit by a wheel seat. The steel belt wound on the wheel is led out towards the car after passing through the guide wheel.

10. The main power unit of the elevator according to claim 2, characterized in that: The shaft ends of the main unit are provided with supporting bearing seats.

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