Forced driving steel belt winding main machine stable in transition

Abstract

The invention relates to the technical field of elevator parts, in particular to a stable-transition forced driving steel belt winding main machine which comprises a steel belt wheel, steel belt baffles are symmetrically installed on the two sides of the steel belt wheel, a horizontal cutting face is arranged on the steel belt wheel in the direction parallel to the axis, and a steel belt pressing plate is detachably installed on the horizontal cutting face through a pressing plate bolt. The face, opposite to the horizontal cutting face, of the steel belt pressing plate is a pressing plate plane, and the gap between the pressing plate plane and the horizontal cutting face is a steel belt pressing gap. The extension curve of the peripheral surfaces of the steel belt wheel and the steel belt pressing plate is a vortex-shaped spiral line, and one end of the steel belt is fixedly mounted in the steel belt pressing gap and is wound along the path of the vortex-shaped spiral line on the peripheral surfaces of the steel belt wheel and the steel belt pressing plate in sequence; the steel belt wheel and the steel belt pressing plate are integrally designed into a vortex-shaped spiral line, so that when the steel belt is wound, the bent position of a steel belt connector is in smooth transition. The invention further provides a winding curve equation and a control equation of an elevator up-down operation curve, and a relational expression of the elevator lifting height and the steel belt winding outer circle is deduced.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator components, and in particular to a forced-drive steel belt winding main machine with smooth transition. Background Art

[0002] Forced-drive elevators are non-frictionally driven elevators using steel chains, wire ropes, or steel belts for suspension. Conventional traction elevators, on the other hand, rely on friction in the rope grooves of the main engine's drive sheaves to propel the hoist ropes. Forced-drive elevators, unlike conventional traction elevators, do not require a counterweight, allowing for a smaller hoistway cross-section. This significantly improves the elevator's usability and is widely used in residential elevators.

[0003] The power mechanism of a forced-drive elevator is a forced-drive steel belt winding unit. The quality of the steel belt winding unit depends primarily on the structure of the steel belt pulley and steel belt pressure plate, as well as the method of fixing the steel belt pressure plate. Because the steel belt is wound on the steel belt pulley, the thickness of the steel belt must be increased at the interface with each turn. If the outer periphery of the steel belt pulley and steel belt pressure plate is designed as a normal cylinder, that is, the winding curve of the steel belt is circular, there will inevitably be a convex point at the interface. Each turn will cause the steel belt to vibrate, affecting the operation of the elevator. Therefore, the shape design of the steel belt pulley and steel belt pressure plate is very important. In addition, to reduce the wear of the steel belt, the design of the steel belt pulley baffle is also critical. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a forced drive steel strip winding main machine with a smooth transition, which can reduce vibration during the operation of the steel strip, ensure smooth transition at the bending part of the steel strip interface, reduce steel strip wear, and reduce friction noise.

[0005] To solve the above technical problems, the technical solution of the present invention is: a forced-drive steel belt winding main machine with a smooth transition, comprising a steel belt pulley, a transmission hole is opened in the center of the steel belt pulley, and the transmission hole is used to connect a driving motor or a reducer, and a circle of mounting grooves are respectively arranged around the outer circumference of both sides of the steel belt pulley, and symmetrically arranged steel belt baffles are installed in the mounting grooves, the outer diameter of the steel belt baffle is larger than the outer diameter of the steel belt pulley, and a horizontal cutting surface is provided on the steel belt pulley parallel to the axial direction, and a steel belt pressure plate is detachably installed on the horizontal cutting surface by a pressure plate bolt, and the side of the steel belt pressure plate opposite to the horizontal cutting surface is a pressure plate plane, and the horizontal cutting surface is parallel to the pressure plate plane and is spaced apart, and the gap between the two is a steel belt pressing gap; the outer circumferential surface extension curve of the steel belt pulley and the steel belt pressure plate is a vortex spiral line, one end of the steel belt is fixedly installed in the steel belt pressing gap, and the other end of the steel belt extends out of the steel belt pressing gap and is sequentially wound along the path of the vortex spiral line of the outer circumferential surface of the steel belt pulley and the steel belt pressure plate.

[0006] As an optimal technical solution, the steel belt pressure plate is sequentially a pressure plate small end and a pressure plate large end along the extension direction of the vortex spiral line, and the pressure plate small end and the pressure plate large end are respectively provided with arc chamfers; the steel belt pulley is sequentially a pulley small end and a pulley large end along the extension direction of the vortex spiral line, and a transition arc is provided at the junction of the pulley small end and the horizontal cutting surface; the vortex spiral line starts from the pulley small end and extends sequentially along the direction of the pulley large end, the pressure plate small end and the pressure plate large end.

[0007] As a preferred technical solution, the curve equation of the vortex spiral is:

[0008]

[0009] in:

[0010] r - pitch radius of any point on the steel strip;

[0011] r1-radius of the reference circle;

[0012] θ - rotation angle (the angle of rotation from the starting point);

[0013] h-steel strip thickness;

[0014] The vortex spiral line starts from the small end of the pulley and is regarded as the starting point of the reference circle radius r1. Starting from the starting point, each time an angle θ is increased, a corresponding point r is formed on the vortex spiral line until it ends at the large end of the pressure plate.

[0015] As a preferred technical solution, in order to ensure the constant speed operation of the elevator, the running curve equation of the steel belt winding elevator when it rises is:

[0016]

[0017] in:

[0018] r - pitch radius of any point on the steel strip;

[0019] r1-radius of the reference circle;

[0020] θ - rotation angle (the angle of rotation from the starting point);

[0021] h-steel strip thickness;

[0022] The equation of the running curve when the steel belt is loosened and the elevator descends is:

[0023]

[0024] in:

[0025] r - pitch radius of any point on the steel strip;

[0026] r1-the maximum circle radius of the steel belt when the car is at the top floor;

[0027] θ - rotation angle (rotation angle gradually decreasing from the maximum point);

[0028] h-steel strip thickness.

[0029] As a preferred technical solution, after the steel belt pressure plate and the steel belt pulley fix the steel belt, when the car is at the bottom floor, at least two turns of safety margin are left on the steel belt pulley. At this time, the maximum winding outer diameter of the steel belt is calculated as follows:

[0030]

[0031] in:

[0032] D- Maximum outer diameter of the steel belt when it is on the top of the car;

[0033] i-traction ratio;

[0034] L- elevator lifting height;

[0035] d1-base diameter of steel pulley;

[0036] h-steel strip thickness.

[0037] As a preferred technical solution, the outer circle calculation formula of the steel strip baffle is d≥D+2h;

[0038] Wherein: d is the outer diameter of the steel strip baffle; D is the maximum winding outer diameter of the steel strip; h is the thickness of the steel strip.

[0039] As a preferred technical solution, the steel belt baffle is fixed to the steel belt pulley by a baffle screw, the thickness of the steel belt baffle is consistent with the thickness of the mounting groove, and the spacing between the two steel belt baffles is equal to the width of the steel belt.

[0040] As a preferred technical solution, an avoidance hole is provided on the steel belt baffle at the steel belt pressure plate.

[0041] As a preferred technical solution, the steel belt baffle is a polyethylene baffle.

[0042] As a preferred technical solution, the contact surface between the polyethylene baffle and the steel belt is coated with grease.

[0043] Due to the adoption of the above technical solution, a steel belt winding main machine with a smooth transition is forced to be driven, including a steel belt pulley, a transmission hole is opened in the center of the steel belt pulley, the transmission hole is used to connect the drive motor or the reducer, and a circle of mounting grooves are respectively arranged around the outer circumference of both sides of the steel belt pulley, and symmetrically arranged steel belt baffles are installed in the mounting grooves. The outer diameter of the steel belt baffle is larger than the outer diameter of the steel belt pulley, and a horizontal cutting surface is provided on the steel belt pulley parallel to the axial direction. A steel belt pressure plate is detachably installed on the horizontal cutting surface through a pressure plate bolt, and the side of the steel belt pressure plate opposite to the horizontal cutting surface The horizontal cutting surface is parallel to the pressing plate plane and spaced apart from the pressing plate plane, with the gap between the two being the steel strip pressing gap. The curve extending from the outer circumference of the steel belt pulley and the steel belt pressing plate is a spiral line. One end of the steel belt is fixedly installed in the steel belt pressing gap, and the other end of the steel belt extends out of the steel belt pressing gap and is wound in sequence along the spiral line path of the steel belt pulley and the outer circumference of the steel belt pressing plate. The beneficial effect of the present invention is that the present invention designs the steel belt pulley and the steel belt pressing plate as a whole into a spiral line, so that when the steel belt is wound, the bend of the steel belt interface transitions smoothly. There is a gap of the thickness of the steel belt between the steel belt pulley and the steel belt pressing plate, which is the steel belt pressing gap space, and a transition arc is provided at the bend of the steel belt, i.e., the intersection of the small end of the pulley and the horizontal cutting surface, to effectively prevent the steel belt from bulging when bent. Since the pitch circle of each turn of the steel belt changes after winding, the present invention also proposes a reasonable winding curve equation and a control equation for the up and down operation curves of the elevator, and derives the relationship between the elevator lifting height and the outer circle of the steel belt winding. The steel belt baffle is made of high-molecular-weight polyethylene, effectively reducing the friction coefficient between the steel belt and the baffle, preventing damage to the steel belt edge due to excessive friction. The integrated design of the steel belt pulley and the spiral helix of the steel belt pressure plate provides a sound theoretical foundation for the steel belt winding scheme and the algorithm and theoretical basis for the actual operation of the steel belt winding main unit, greatly promoting the development of steel belt winding elevators. This integrated design of the steel belt pulley and the spiral helix of the steel belt pressure plate ensures smooth elevator operation without bumps or vibrations. The steel belt winding main unit can forcefully lift the elevator car, eliminating the need for counterweights and saving elevator installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0045] Figure 1 This is a schematic structural diagram of the present invention's smooth transition forced drive steel strip winding main machine when no steel strip is installed;

[0046] Figure 2 This is a schematic structural diagram of the present invention's smooth transition forced drive steel strip winding main machine with the steel strip baffle removed;

[0047] Figure 3 This is a schematic structural diagram of the present invention's smooth transition forced drive steel strip winding main machine after the steel strip is installed;

[0048] Figure 4 yes Figure 3 Cross-sectional view along the AA axis;

[0049] Figure 5 yes Figure 4 A partial enlarged view of point I in the middle;

[0050] Figure 6 This is a schematic diagram of the winding principle of the vortex spiral wire of the present invention;

[0051] Figure 7 Schematic diagram of the winding of the steel strip of the present invention.

[0052] In the figure: 1-steel pulley; 101-transmission hole; 102-mounting groove; 103-horizontal cutting surface; 104-pulley small end; 105-pulley large end; 106-transition arc; 2-steel belt baffle; 201-avoidance hole; 3-steel belt pressure plate; 301-pressure plate plane; 302-pressure plate small end; 303-pressure plate large end; 4-steel belt press-fitting gap; 5-vortex spiral line; 6-baffle screw; 7-pressure plate bolt; 8-steel belt. DETAILED DESCRIPTION

[0053] The present invention will be further described below with reference to the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. It is understood that those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of the claims.

[0054] like Figures 1 to 7As shown in the figure, the transition-smooth forced-drive steel belt winding main machine includes a steel belt pulley 1, a transmission hole 101 is opened in the center of the steel belt pulley 1, the transmission hole 101 is used to connect the drive motor or reducer, and a circle of mounting grooves 102 are respectively arranged around the outer circumference of the two sides of the steel belt pulley 1. A symmetrically arranged steel belt baffle 2 is installed in the mounting groove 102. The outer diameter of the steel belt baffle 2 is larger than the outer diameter of the steel belt pulley 1. A horizontal cutting surface 103 is provided on the steel belt pulley 1 parallel to the axial direction. The horizontal cutting surface 103 is detachable through the pressure plate bolt 7 A steel belt pressing plate 3 is installed. The side of the steel belt pressing plate 3 opposite the horizontal cutting surface 103 is a pressing plate plane 301. The horizontal cutting surface 103 and the pressing plate plane 301 are arranged parallel and spaced apart, and the gap between them is a steel belt pressing gap 4. The outer peripheral surface extension curve of the steel belt pulley 1 and the steel belt pressing plate 3 is a spiral line 5. One end of the steel belt 8 is fixedly installed in the steel belt pressing gap 4, and the other end of the steel belt 8 extends out of the steel belt pressing gap 4 and is sequentially wound along the path of the spiral line 5 on the outer peripheral surface of the steel belt pulley 1 and the steel belt pressing plate 3. The present invention designs the steel belt pulley 1 and the steel belt pressing plate 3 as a whole into a spiral line 5, so that when the steel belt 8 is wound, the interface bend of the steel belt 8 has a smooth transition. A gap equal to the thickness of the steel strip 8 exists between the steel pulley 1 and the steel strip pressure plate 3, known as the steel strip pressing gap 4. A transition arc 106 is provided at the bend of the steel strip 8, i.e., at the intersection of the pulley's small end 104 and the horizontal cutting surface 103, to effectively prevent the steel strip 8 from bulging when bent. The steel strip pressure plate 3 is designed to clamp the steel strip from both sides, ensuring that the steel strip 8 does not deflect. Because the pitch circle of the steel strip 8 changes with each turn, the present invention also proposes a reasonable winding curve equation and control equations for the elevator's up and down travel curves, deriving a relationship between the elevator's lifting height and the outer circle of the steel strip 8 winding. The steel strip baffle 2 is made of high-molecular-weight polyethylene, effectively reducing the friction coefficient between the steel strip 8 and the steel strip baffle 2, preventing damage to the edges of the steel strip 8 from excessive friction. The integrated design of the spiral helix 5 of the steel pulley 1 and the steel strip pressure plate 3 provides a sound theoretical foundation for the steel strip 8 winding scheme, and provides an algorithmic and theoretical basis for the actual operation of the steel strip 8 winding machine, significantly advancing the development of elevators using steel strip 8 winding. The overall design of the steel pulley 1, steel belt pressure plate 3 and spiral line 5 ensures smooth operation of the elevator without bumps and vibrations. The steel belt 8 is wound around the main engine to force the car to lift, eliminating the need for counterweights and saving elevator installation space.

[0055] like Figure 6As shown, the steel belt pressure plate 3, along the extension direction of the spiral line 5, is divided into a small pressure plate end 302 and a large pressure plate end 303, each of which is provided with a circular chamfer. The steel belt pulley 1, along the extension direction of the spiral line 5, is divided into a small pulley end 104 and a large pulley end 105, with a transition arc 106 provided at the junction of the small pulley end 104 and the horizontal cutting surface 103. The spiral line 5 starts from the small pulley end 104 and extends in the direction of the large pulley end 105, the small pressure plate end 302, and the large pressure plate end 303. The circular chamfer is intended to reduce friction when in contact with the steel belt 8 and avoid unnecessary wear, and has no effect on the extension direction of the entire spiral line 5. The transition arc 106 is where the steel belt 8 bends along the steel belt pulley 1 for the first time after extending from the steel belt press gap 4. The arc shape here is set to prevent the steel belt 8 from bulging when bending, allowing the steel belt 8 to smoothly wrap around the steel belt pulley 1.

[0056] The curve equation of the vortex spiral 5 is:

[0057]

[0058] in:

[0059] r - the pitch radius of any point on the steel strip 8;

[0060] r1-radius of the reference circle;

[0061] θ - rotation angle (the angle of rotation from the starting point);

[0062] h-thickness of steel strip 8;

[0063] The vortex spiral line 5 starts from the small end 104 of the pulley and is regarded as the starting point of the reference circle radius r1. Starting from the starting point, each time an angle θ is increased, a corresponding point r is formed on the vortex spiral line 5 until it ends at the large end 303 of the pressure plate.

[0064] Since the outer circle of the steel belt 8 changes at any time when it is wound, the up and down movement of the steel belt 8 winding main machine is also gradually changing speed, requiring the speed of the main machine to change at any time to ensure constant speed operation of the elevator.

[0065] Therefore, it is necessary to design a reasonable and controllable operating curve algorithm to control the uniform speed operation of the elevator.

[0066] In order to ensure the constant speed operation of the elevator, the running curve equation of the steel belt 8 when it is wound around the elevator is:

[0067]

[0068] in:

[0069] r - the pitch radius of any point on the steel strip 8;

[0070] r1-radius of the reference circle;

[0071] θ - rotation angle (the angle of rotation from the starting point);

[0072] h-thickness of steel strip 8;

[0073] The equation of the running curve when the steel belt 8 is loose and the elevator descends is:

[0074]

[0075] in:

[0076] r - the pitch radius of any point on the steel strip 8;

[0077] r1-the maximum circle radius of the steel belt 8 when the car is at the top floor;

[0078] θ - rotation angle (rotation angle gradually decreasing from the maximum point);

[0079] h- steel strip 8 thickness.

[0080] After the steel belt pressing plate 3 and the steel belt pulley 1 fix the steel belt 8, when the car is at the bottom floor, at least two turns of safety margin are left on the steel belt pulley 1. At this time, the maximum winding outer diameter of the steel belt 8 is calculated as follows:

[0081]

[0082] in:

[0083] D- Maximum winding outer diameter of the steel belt 8 at the top of the car;

[0084] i-traction ratio;

[0085] L- elevator lifting height;

[0086] d1-base diameter of steel pulley 1;

[0087] h- steel strip 8 thickness.

[0088] The calculation formula for the outer circle of the steel strip baffle 2 is d≥D+2h;

[0089] Wherein: d is the outer diameter of the steel strip baffle 2; D is the maximum winding outer diameter of the steel strip 8; h is the thickness of the steel strip 8.

[0090] like Figure 1 、 Figure 3 and Figure 4As shown, the steel belt baffle 2 is fixed to the steel belt pulley 1 by baffle screws 6. The thickness of the steel belt baffle 2 is consistent with the thickness of the mounting groove 102, and the spacing between the two steel belt baffles 2 is equal to the width of the steel belt 8. In this embodiment, four baffle screws 6 are selected, and the number can be increased or decreased according to actual conditions. The thickness of the steel belt baffle 2 is consistent with the thickness of the mounting groove 102. This ensures that the outer wall of the steel belt baffle 2 is flush with the outer wall of the steel belt pulley 1 after installation, ensuring the stability of the equipment. The spacing between the two steel belt baffles 2 is equal to the width of the steel belt 8 to fully ensure that the steel plate does not deflect during winding.

[0091] like Figure 1 and Figure 3 As shown in the figure, a clearance hole 201 is provided on the steel belt baffle 2 at the steel belt pressing plate 3. The clearance hole 201 provides space for the installation of the steel belt pressing plate 3 and the pressing plate bolt 7.

[0092] The steel strip baffle 2 is a polyethylene baffle. It can also be a baffle made of other polymer materials, as long as it can effectively reduce the friction coefficient between the steel strip baffle 2 and the steel strip 8.

[0093] The contact surface of polyethylene baffle and steel belt 8 is coated with grease. In actual use, the edge of steel belt baffle 2 adds appropriate grease, friction coefficient is smaller, and use effect can be better.

[0094] The installation steps of the present invention are as follows:

[0095] Insert the head end of the steel belt 8 into the horizontal cutting surface 103 of the steel pulley 1, with the head end of the steel belt 8 facing the large end 105 of the pulley, and the head end of the steel belt 8 cannot extend out of the large end 105 of the pulley. Then press the steel belt pressure plate 3 onto the steel belt 8, with the small end 302 of the pressure plate facing the large end 105 of the pulley, and the large end 303 of the pressure plate facing the transition arc 106 of the small end 104 of the pulley. Then penetrate the steel belt pressure plate 3 with the pressure plate bolt 7 and press it tightly on the steel pulley 1. Then put on the steel belt baffles 2 on both sides of the steel pulley 1, tighten them with the baffle screws 6, and then tighten the tail end of the steel belt 8, and then you can wind the steel belt 8 along the vortex spiral line 5.

[0096] Beneficial effects of the present invention:

[0097] (1) The overall design of the vortex helix 5 of the steel belt pulley 1 and the steel belt pressure plate 3 provides a good theoretical basis for the steel belt winding scheme.

[0098] (2) It provides algorithms and theoretical basis for the actual operation of the steel strip winding main machine, which greatly promotes the development of steel strip winding elevators.

[0099] (3) The overall design of the vortex spiral line 5 of the steel belt pulley 1 and the steel belt pressure plate 3 ensures the smooth operation of the elevator without bumps and vibrations.

[0100] (4) The steel belt winding main unit can forcibly lift the car without the need for counterweights, saving elevator installation space.

[0101] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0102] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. The forced drive steel strip winding machine with smooth transition is characterized by: The invention comprises a steel belt pulley (1), wherein a transmission hole (101) is provided at the center of the steel belt pulley (1), wherein the transmission hole (101) is used to connect a driving motor or a reducer, wherein a circle of mounting grooves (102) are respectively provided around the outer peripheral surfaces of both sides of the steel belt pulley (1), wherein symmetrically arranged steel belt baffles (2) are installed in the mounting grooves (102), wherein the outer diameter of the steel belt baffles (2) is larger than the outer diameter of the steel belt pulley (1), wherein the steel belt pulley (1) is provided with a horizontal cutting surface (103) parallel to the axial direction, wherein a steel belt pressure plate (3) is detachably installed on the horizontal cutting surface (103) via a pressure plate bolt (7), wherein the steel belt pressure plate (3) is detachably installed on the horizontal cutting surface (103), wherein the steel belt pressure plate (3) is detachably installed on the horizontal cutting surface (103) via a pressure plate bolt (7), wherein the steel belt pressure plate (3) is symmetrically installed in the mounting grooves (102), wherein the steel belt pressure plate (2) is symmetrically installed in the mounting grooves (102), wherein the outer diameter of the steel belt baffle (2) is larger than the outer diameter of the steel belt pulley (1 ...symmetrically installed in the mounting grooves (102), wherein the steel belt pressure plate (3) is symmetrically installed in the mounting grooves (102), wherein the steel belt pressure plate (3) is symmetrically installed in the mounting grooves (10 The side of the plate (3) opposite to the horizontal cutting surface (103) is a pressing plate plane (301), and the horizontal cutting surface (103) and the pressing plate plane (301) are arranged in parallel and spaced apart, and the gap between the two is a steel belt pressing gap (4); the extension curve of the outer peripheral surface of the steel belt pulley (1) and the steel belt pressing plate (3) is a vortex spiral line (5), one end of the steel belt (8) is fixedly installed in the steel belt pressing gap (4), and the other end of the steel belt (8) extends out of the steel belt pressing gap (4) and is sequentially wound along the path of the vortex spiral line (5) on the outer peripheral surface of the steel belt pulley (1) and the steel belt pressing plate (3).

2. The forced-drive steel strip winding machine with smooth transition according to claim 1, characterized in that: The steel belt pressure plate (3) is sequentially divided into a pressure plate small end (302) and a pressure plate large end (303) along the extension direction of the vortex spiral line (5), and the pressure plate small end (302) and the pressure plate large end (303) are respectively provided with arc chamfers; the steel belt pulley (1) is sequentially divided into a pulley small end (104) and a pulley large end (105) along the extension direction of the vortex spiral line (5), and a transition arc (106) is provided at the junction of the pulley small end (104) and the horizontal cutting surface (103); the vortex spiral line (5) starts from the pulley small end (104) and extends sequentially along the pulley large end (105), the pressure plate small end (302) and the pressure plate large end (303).

3. The forced drive steel strip winding machine with smooth transition as claimed in claim 2, characterized in that: The curve equation of the vortex spiral (5) is: in: r - pitch radius of any point of the steel strip (8); r1-radius of the reference circle; θ - rotation angle (the angle of rotation from the starting point); h-thickness of steel strip (8); The vortex spiral line (5) starts from the small end (104) of the pulley and is regarded as the starting point of the reference circle radius r1. Starting from the starting point, each time an angle θ is increased, a corresponding point r is formed on the vortex spiral line (5) until it ends at the large end (303) of the pressure plate.

4. The forced drive steel strip winding machine with smooth transition as claimed in claim 2, characterized in that: In order to ensure the constant speed operation of the elevator, the running curve equation of the steel belt (8) when it is wound around the elevator is: in: r - pitch radius of any point of the steel strip (8); r1-radius of the reference circle; θ - rotation angle (the angle of rotation from the starting point); h-thickness of steel strip (8); The equation of the running curve when the steel belt (8) is loose and the elevator descends is: in: r - pitch radius of any point of the steel strip (8); r1 - the maximum circle radius of the steel belt (8) when the car is at the top floor; θ - rotation angle (rotation angle gradually decreasing from the maximum point); h-thickness of steel strip (8).

5. The forced drive steel strip winding main machine with smooth transition as claimed in claim 2, characterized in that: After the steel belt pressure plate (3) and the steel belt pulley (1) fix the steel belt (8), when the car is at the bottom floor, at least two turns of safety margin are left on the steel belt pulley (1). At this time, the maximum winding outer diameter of the steel belt (8) is calculated as follows: in: D-the maximum winding outer diameter of the steel belt (8) at the top of the car; i-traction ratio; L- elevator lifting height; d1-base diameter of the steel pulley (1); h-thickness of steel strip (8).

6. The forced-drive steel strip winding machine with smooth transition according to claim 5, characterized in that: The calculation formula of the outer circle of the steel strip baffle (2) is d≥D+2h; Wherein: d is the outer diameter of the steel strip baffle (2); D is the maximum winding outer diameter of the steel strip (8); and h is the thickness of the steel strip (8).

7. The forced-drive steel strip winding machine with smooth transition according to claim 1, characterized in that: The steel belt baffle (2) is fixed to the steel belt pulley (1) by a baffle screw (6); the thickness of the steel belt baffle (2) is consistent with the thickness of the mounting groove (102); and the spacing between the two steel belt baffles (2) is equal to the width of the steel belt (8).

8. The forced-drive steel strip winding machine with smooth transition according to claim 1, characterized in that: An avoidance hole (201) is provided on the steel belt baffle (2) at the steel belt pressure plate (3).

9. The forced-drive steel strip winding machine with smooth transition according to any one of claims 1 to 8, characterized in that: The steel belt baffle (2) is a polyethylene baffle.

10. The forced-drive steel strip winding machine with smooth transition according to claim 9, characterized in that: The contact surface between the polyethylene baffle and the steel belt (8) is coated with lubricating grease.

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