Short-distance Balanced Braking Structure Applied to Villa Elevators

Abstract

The present invention discloses a short-distance balanced braking structure applied to a villa elevator. The structure is based on the traction system and the braking system in the elevator. The direction of the traction wire rope is changed by adding an auxiliary hydraulic system. The traction process of the bridge box and the counterweight block will not be interfered with essentially. Instead, the routing angle of the traction wire rope relative to the traction wheel is changed by the first limiting wire wheel and the second limiting wire wheel. When the traction wheel is braked by the brake pad arc frame, the routing angle of the traction wire rope at the first limiting wire wheel and the second limiting wire wheel will be further affected. The load-bearing part is used as the key load-bearing position. When the routing angle changes, the braking effect of the traction wheel is not directly affected, but the traction distance of the traction wire rope is slightly changed, and the tension change of the traction wire rope is borne and "transferred" according to the linear movement process and the angle deflection process in the first limiting wire wheel and the second limiting wire wheel.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator braking, and particularly to a short-distance balanced braking structure applied to a villa elevator. Background Art

[0002] Any form of elevator structure is equipped with a braking system, which essentially uses friction to interfere with the operation process of the traction machine structure. For reference, see the publication numbers CN106687404A and CN103889874A, and the working principles include electromagnetic braking, hydraulic braking, disc braking, etc.

[0003] From the perspective of inertia, there is a direct relationship among the braking distance, the traveling speed of the car, and the load-bearing gravity in the braking system. Moreover, the braking process (ascending and descending) will impose a tension burden on the steel cable structure in the traction system. For the elevator system used in villas, it is in a light-load and short-distance operating state. Taking the example of 2.79 - 3.5m per floor, the "usable" braking distance is relatively short, which may lead to problems such as excessive / high braking force, thereby having a greater "negative impact" on the car and the steel cable structure in the car. For example, the uneven distribution of the steel wire rope tension (such as the tension deviation of a single steel wire rope exceeding 5%) may cause local frictional overheating or slipping, or the steel wire rope may generate an additional tensile load due to the inertia of the car, accelerating fatigue damage, resulting in a further expansion of the tension imbalance. Specifically, it is an accident caused by the problem of the steel wire rope tension imbalance. Summary of the Invention

[0004] The purpose of the present invention is to provide a short-distance balanced braking structure applied to a villa elevator. For the elevator system in a villa, because the overall braking distance of the car is relatively short, problems such as excessive / high braking force may occur during the overall braking process, specifically reflected in the tension change in the steel wire structure in the traction system, especially the accident caused by the tension imbalance at two positions of the steel wire rope, such as accelerating the fatigue damage of the steel wire rope and the problem of derailment.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A short-distance balanced braking structure applied to a villa elevator includes an installation frame, a transmission wheel, a traction wheel, and a braking oil cylinder. A brake shoe arc frame corresponding to the transmission wheel is installed at the transmission end of the braking oil cylinder, and an auxiliary hydraulic system is provided at the position corresponding to the lower side of the traction wheel on the installation frame;

[0006] The auxiliary hydraulic system includes a first limit wire pulley and a second limit wire pulley arranged from top to bottom. A traction steel wire rope is arranged on the first limit wire pulley, the traction sheave, and the second limit wire pulley. The first limit wire pulley and the second limit wire pulley are symmetrically arranged along the length direction of the installation frame. An arc-shaped main frame is arranged on one of the first limit wire pulleys. One side of the traction steel wire rope corresponding to the arc-shaped main frame is set as the load part, and the other side is set as the counterweight part.

[0007] It is further set that: the setting position of the brake piece arc frame corresponds to the outer wall position of the transmission wheel.

[0008] It is further set that: the other first limit wire pulley and the two second limit wire pulleys are slidably connected to the installation frame along the length direction of the installation frame. The cross-section of the arc-shaped main frame is in an inverted V shape, and the middle position of the arc-shaped main frame is rotatably connected to the installation frame.

[0009] It is further set that: a two-way oil cylinder corresponding to the second limit wire pulley is installed on the installation frame. The traction steel wire rope is wound around the inner side of the second limit wire pulley close to the two-way oil cylinder and the outer side of the first limit wire pulley far from the arc-shaped main frame in sequence.

[0010] It is further set that: the horizontal distance between the first limit wire pulley and the second limit wire pulley corresponding to one side of the installation frame is set as A, and the horizontal distance between the first limit wire pulley and the second limit wire pulley corresponding to the other side of the installation frame is set as B.

[0011] It is further set that: the arc-shaped main frame is composed of a stress frame and a generating force frame. A roller corresponding to the transmission wheel is rotatably installed at the end position of the generating force frame. The stress frame and the generating force frame are arranged along the direction from the counterweight part to the load part.

[0012] It is further set that: the horizontal length between the center points of the first limit wire pulley and the second limit wire pulley and the center point of the traction sheave is greater than the radius of the traction sheave, and A is not equal to B.

[0013] It is further set that: a straight line frame corresponding to the middle position of the arc-shaped main frame, an oil storage cylinder corresponding to the other first limit wire pulley, and a sliding seat are arranged inside the installation frame. The sliding seat and the straight line frame are slidably connected to the installation frame along the length direction of the installation frame, and the sliding seat is rotatably connected to the other first limit wire pulley;

[0014] A driving gear is arranged inside the straight line frame. The center point of the driving gear is fixedly connected to the middle position of the arc-shaped main frame, and the driving gear is in a meshing relationship with one side of the inner wall of the straight line frame.

[0015] Further set as: An auxiliary oil cylinder corresponding to the straight frame is installed on the installation frame, and the auxiliary oil cylinder is communicated with the oil cavity inside the bidirectional oil cylinder.

[0016] The present invention has the following beneficial effects:

[0017] The present invention changes the running direction of the traction steel wire rope on the basis of the braking system and the traction system in the elevator. Specifically, based on the first limit guide pulley and the second limit guide pulley, first, the two are restricted to be arranged on the lower side of the traction sheave. By changing the horizontal distances A and B between the two and the center of the traction sheave, the running angle of the traction steel wire rope relative to the traction sheave is changed. However, it will not directly interfere with the normal transmission process in the traction system and the braking process of the braking system. Both the first limit guide pulley and the second limit guide pulley will change the running angle due to the change in the tension of the traction steel wire rope. Specifically, the arc-shaped main frame in the first limit guide pulley is the key part. Among them, the second limit guide pulley and one of the limit guide pulleys can only slide horizontally, while the arc-shaped main frame deflects at an angle due to the change in the tension of the traction steel wire rope.

[0018] Based on the above content, the arc-shaped main frame in the first limit guide pulley is further optimized to form a force-bearing frame and a force-generating frame. The force-generating frame directly bears the change in the tension of the traction steel wire rope at the corresponding load-bearing part and deflects at an angle, thereby driving the force-bearing frame to move towards the other first limit guide pulley. However, when the other first limit guide pulley slides horizontally, it will also generate a reverse thrust on the force-bearing frame, forming a relatively balanced state. The key lies in: changing the oil pressure changes in the storage oil cylinder and the auxiliary oil cylinder for the two actions of sliding and deflecting of the two first limit guide pulleys, and further transferring the oil pressure change to the bidirectional oil cylinder. The key purpose is to actively bear and "transfer" the change in the tension of the traction steel wire rope in the form of hydraulic oil through the tension-hydraulic conversion process. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a short-distance balanced braking structure applied to a villa elevator proposed by the present invention;

[0021] Figure 2 In the short-distance balanced braking structure applied to a villa elevator proposed by the present invention Figure 1 Front view;

[0022] Figure 3 The structural schematic diagram of the traction wheel in the short - distance balanced braking structure applied to the villa elevator proposed by the present invention;

[0023] Figure 4 The structural schematic diagram of the auxiliary hydraulic system in the short - distance balanced braking structure applied to the villa elevator proposed by the present invention;

[0024] Figure 5 The guiding schematic diagram of the short - distance balanced braking structure applied to the villa elevator proposed by the present invention;

[0025] Figure 6 The sectional view of the straight - line frame in the short - distance balanced braking structure applied to the villa elevator proposed by the present invention;

[0026] Figure 7 The sectional view of the two - way oil cylinder in the short - distance balanced braking structure applied to the villa elevator proposed by the present invention.

[0027] In the figure: 1. Installation frame; 2. Braking oil cylinder; 3. Brake piece arc frame; 4. Driving wheel; 5. Traction wheel; 501. Counterweight part; 502. Load part; 6. First limit wire wheel; 7. Second limit wire wheel; 8. Two - way oil cylinder; 9. Arc total frame; 901. Force - receiving frame; 902. Force - generating frame; 10. Auxiliary oil cylinder; 11. Straight - line frame; 12. Oil storage cylinder; 13. Slide seat; 14. Driving gear. Specific embodiments

[0028] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0029] Embodiment 1: For the elevator system in a villa, because the overall car braking distance is relatively short, problems such as too high or too low braking force may occur during the overall braking process. Specifically, it is reflected in the tension change in the wire rope structure of the traction system, especially the accidental situations caused by the tension imbalance at two positions of the wire rope, such as accelerating the fatigue damage of the wire rope and the problem of the wire rope coming out of the groove. For this, the following technical solutions are proposed:

[0030] Refer to Figures 1 to 7 , the short - distance balanced braking structure applied to the villa elevator in this embodiment includes an installation frame 1, a driving wheel 4, a traction wheel 5, and a braking oil cylinder 2. A brake piece arc frame 3 corresponding to the driving wheel 4 is installed at the transmission end position of the braking oil cylinder 2, and an auxiliary hydraulic system is provided at the position corresponding to the lower side of the traction wheel 5 on the installation frame 1;

[0031] The auxiliary hydraulic system includes a first limiting wire wheel 6 and a second limiting wire wheel 7 which are arranged from top to bottom. The first limiting wire wheel 6, the traction wheel 5 and the second limiting wire wheel 7 are provided with traction wire ropes. The first limiting wire wheel 6 and the second limiting wire wheel 7 are symmetrically arranged along the length direction of the mounting frame 1. An arc-shaped main frame 9 is arranged on one of the first limiting wire wheels 6. The position of the traction wire rope on one side of the arc-shaped main frame 9 corresponding to the arc-shaped main frame 9 is set as the load-bearing part 502, and the position on the other side is set as the counterweight part 501. The setting position of the brake pad arc frame 3 corresponds to the outer wall position of the transmission wheel 4.

[0032] Basic principle: For the elevators used in villas, the braking system and traction system are basically the same as those of conventional elevators. The only difference is that due to the limited height of the villa floors, the "available" braking distance is relatively short and there may be a problem of excessive / low braking force. In this regard, the braking system proposed in this invention is based on Figure 1 and Figure 3 For example, the traction wheel 5 and the transmission wheel 4 rotate in a directional manner under the action of the traction motor. When braking is required, the brake cylinder 2 is mainly used as the key power source. Its essence is to drive the brake pad arc frame 3 to fit tightly against the transmission wheel 4, and use friction to achieve the braking purpose. This part is not explained in the present invention.

[0033] Embodiment 2: Optimizing and improving the routing direction of the traction wire rope associated with the first limit wire wheel and the second limit wire wheel:

[0034] Another first limiting wire wheel 6 and two second limiting wire wheels 6 are slidably connected on the mounting frame 1 along the length direction of the mounting frame 1, the cross section of the arc-shaped frame 9 is inverted herringbone shape, and the middle section of the arc-shaped frame 9 is rotatably connected to the mounting frame 1, and a bidirectional oil cylinder 8 corresponding to the second limiting wire wheels 6 is installed on the mounting frame 1;

[0035] The traction wire rope is wound in sequence around the second limit wire wheel 7 close to the inner side of the two-way oil cylinder 8 and the first limit wire wheel 6 away from the outer side of the arc-shaped main frame 9. The horizontal distance between the first limit wire wheel 6 and the second limit wire wheel 7 corresponding to the position on one side of the mounting frame 1 is set to A, and the horizontal distance between the first limit wire wheel 6 and the second limit wire wheel 7 corresponding to the position on the other side of the mounting frame 1 is set to B. The arc-shaped main frame 9 is composed of a force-bearing frame 901 and a force-generating frame 902. The roller corresponding to the transmission wheel 4 is rotatably installed at the end position of the force-generating frame 902. The force-bearing frame 901 and the force-generating frame 902 are arranged in the direction from the counterweight part 501 to the load-bearing part 502. The length along the horizontal direction between the center point of the first limit wire wheel 6, the second limit wire wheel 7 and the center point of the traction wheel 5 is greater than the radius of the traction wheel 5, and A is not equal to B.

[0036] Solution Description: Combined Figure 2For illustration, in the normal state, one end of the traction steel wire rope bypassing the traction sheave for connecting the car is set as the load part 502, while the other end connecting the counterweight structure is set as the counterweight 501. And on the basis of maintaining traction stability, it is necessary to ensure that the steel wire rope at the corresponding load part 502 is vertically tangent to the outer edge of the traction sheave 5. This part corresponds to Figure 5 the alignment line in, and its purpose is to ensure that the outer edge of one of the limit guide sheaves 7 is in the same tangent plane as the outer edge of the traction sheave;

[0037] However, further illustrate with reference to the two sets of numerical values A and B: The two first limit guide sheaves 6 exert an outward thrust on the traction steel wire rope, so that the traction steel wire rope between the traction sheave 5 and the first limit guide sheave 6 is not in a completely vertical state but presents an arc shape bent outward. On the contrary, the second limit guide sheave 7 exerts an outward pressure on the traction steel wire rope, making it produce an arc shape bent inward, thereby changing the routing angle of the traction steel wire rope relative to the traction sheave 5. In this regard, during the normal traction drive and braking process, the traction steel wire rope will also exert an inward horizontal pressure on the first limit guide sheave 6, and vice versa, it will exert an outward horizontal thrust on the second limit guide sheave 7;

[0038] Take Figure 5 as an example. The first limit guide sheave 6 at the left position and the two second limit guide sheaves 7 all undergo a sliding process in the horizontal direction. However, the first limit guide sheave 6 at the right position does not move horizontally but undergoes an angular deflection. And explain the force-bearing frame 901 and the force-generating frame 902. When the arc-shaped total frame 9 bears the tension of the traction steel wire rope, it will drive the arc-shaped total frame 9 to rotate counterclockwise. However, a thrust rod for the force-bearing frame 901 is also provided on the first limit guide sheave 6 at the left position. Under the thrust of the thrust rod on the force-bearing frame 901, it will also drive the arc-shaped total frame 9 to rotate clockwise. During the normal traction drive process, when the tension changes borne by the two first limit guide sheaves 6 are relatively balanced, the arc-shaped total frame 9 maintains a relatively stable position;

[0039] However, during the braking process, the tension change generated by the traction steel wire rope corresponding to the load part 502 is greater, thus breaking the position stability of the arc-shaped total frame 9. And the second limit guide sheave 7 is the rear structure of the first limit guide sheave 6. Therefore, the first limit guide sheave 6 bears the tension change prior to the second limit guide sheave 7, and limits the length direction of the force-bearing frame 901. After it rotates to a certain angle, it will contact the transmission wheel 4 through the roller on it and interfere with the angular deflection process of the arc-shaped total frame 9. Its essence is to directly limit the maximum angular deflection of the arc-shaped total frame 9. Thus, it can also be understood that: Although the tension change is indirectly borne through the arc-shaped total frame 9, there is still a maximum bearing capacity, which is still based on the braking process of the transmission wheel 4.

[0040] Embodiment 3: This embodiment is a supplementary description of Embodiment 2:

[0041] Inside the installation frame 1, there are a straight frame 11 corresponding to the middle section of the arc-shaped main frame 9, an oil storage cylinder 12 corresponding to another first limit wire pulley 6, and a sliding seat 13. The sliding seat 13 and the straight frame 11 are slidably connected to the installation frame 1 along the length direction of the installation frame 1, and the sliding seat 13 is rotatably connected to another first limit wire pulley 6;

[0042] Inside the straight frame 11, there is a driving gear 14. The center point of the driving gear 14 is fixedly connected to the middle section of the arc-shaped main frame 9, and the driving gear 14 is in a meshing relationship with one side of the inner wall of the straight frame 11. An auxiliary oil cylinder 10 corresponding to the straight frame 11 is installed on the installation frame 1, and the auxiliary oil cylinder 10 is connected to the oil cavity inside the double-acting oil cylinder 8.

[0043] Scheme description: First, regarding Figure 7 For the description, the double-acting oil cylinder 8 is responsible for the horizontal sliding process of the two second limit wire pulleys 7. For this, there are two independent oil cavities, and according to the interference process of the second limit wire pulley 7 on the traction steel wire rope, the oil cavity is only set on the side close to the second limit wire pulley. When the traction steel wire rope generates an outward thrust on the second limit wire pulley 7, it will reduce the volume of the oil cavity in the double-acting oil cylinder 8, and according to its setting position, it is respectively set as the left oil cavity and the right oil cavity;

[0044] And referring to Figure 6 For the description, when the arc-shaped main frame 9 deflects in angle, it will drive the driving gear 14 to deflect, and drive the straight frame 11 to slide horizontally according to the meshing relationship. Taking the braking process as an example, the tension of the traction steel wire rope at the load part 502 suddenly increases, while the tension of the traction steel wire rope at the counterweight part 501 decreases. Because the arc-shaped main frame 9 will rotate counterclockwise, it will drive the straight frame 11 to move to the left. For this, the auxiliary oil cylinder 10 and the oil storage cylinder 12 are described. Both of them are provided with oil cavities similar to the oil cavity inside the double-acting oil cylinder 8;

[0045] When the straight frame 11 moves to the left, it will cause the volume of the oil cavity inside the auxiliary oil cylinder 10 on the left side to decrease, and vice versa, the volume of the oil cavity inside the auxiliary oil cylinder 10 on the right side will increase. For this, the communication process of the oil cavities in the auxiliary oil cylinder 10, the oil storage cylinder 12, and the double-acting oil cavity 8 is further restricted. During the braking process, the auxiliary oil cylinder 10 on the left side will first supplement the hydraulic oil inside it to the oil storage cylinder 12 and further interfere with the routing angle of the traction steel wire rope at the counterweight part 501;

[0046] If the first limit wire pulley 501 on the left side slides to the maximum distance of the taxiway, the "extra hydraulic oil" in the auxiliary oil cylinder 10 can also be replenished into the oil cavity of the two-way oil cylinder 8 again to further interfere with the routing angle of the traction steel wire rope at the corresponding second limit wire pulley 7. The key purpose of the overall scheme is: the conversion process of the hydraulic oil in the oil cavities of the auxiliary oil cylinder 10, the storage oil cylinder 12, and the two-way oil cavity 8, to withstand and "transfer" the tension change at the load-bearing part 502 by hydraulic pressure, and avoid damage to the traction steel wire rope at the load-bearing part 502 due to large tension fluctuations;

[0047] Finally, after the normal transmission is restored, refer to again Figure 5 , so that the pressure generated by the traction steel wire rope against the second limit wire pulley 7 causes the hydraulic oil inside the oil cavity of the two-way oil cylinder 8 to flow back into the auxiliary oil cylinder 10 and the storage oil cylinder 12 again.

[0048] To sum up: Based on the traction system and braking system in the elevator, by adding an auxiliary hydraulic system to change the routing of the traction steel wire rope, its essence does not interfere with the traction process of the car and the counterweight, but changes the routing angle of the traction steel wire rope relative to the traction sheave with the first limit wire pulley and the second limit wire pulley. Therefore, when braking the traction sheave with the brake shoe bracket, it will further affect the routing angle of the traction steel wire rope at the first limit wire pulley and the second limit wire position. Taking the load-bearing part as the key load-bearing position, when the routing angle changes, it will not directly affect the braking effect of the traction sheave, but slightly change the traction distance of the traction steel wire rope, and withstand and "transfer" the tension change of the traction steel wire rope according to the linear movement process and angle deflection process in the first limit wire pulley and the second limit wire pulley.

[0049] The above content is only an example and description of the structure of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the described specific embodiments or use similar methods to replace them. As long as they do not deviate from the structure of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

Claims

1. The short-distance balance brake structure used in villa elevators includes a mounting frame, a transmission wheel, a traction wheel and a brake cylinder, and is characterized in that: A brake pad bracket corresponding to the transmission wheel is installed at the transmission end of the brake cylinder, and an auxiliary hydraulic system is provided at the position of the mounting frame corresponding to the lower side of the traction wheel; The auxiliary hydraulic system comprises a first limit wire wheel and a second limit wire wheel arranged from top to bottom, the first limit wire wheel, the traction wheel and the second limit wire wheel are provided with traction wire ropes, the first limit wire wheel and the second limit wire wheel are symmetrically arranged along the length direction of the installation frame, one of the first limit wire wheels is provided with an arc-shaped frame, the traction wire rope is provided at one side corresponding to the arc-shaped frame as a load-bearing part, and the other side is provided as a counterweight part; Another of the first limit wire wheels and two second limit wire wheels are slidably connected on the mounting frame along the length direction of the mounting frame. The cross-section of the arc-shaped main frame is an inverted herringbone shape, and the middle section of the arc-shaped main frame is rotatably connected to the mounting frame. The arc-shaped main frame is composed of a force-bearing frame and a force-generating frame. Rollers corresponding to transmission wheels are rotatably installed at the end positions of the force-generating frame. The force-bearing frame and the force-generating frame are arranged along the direction from the counterweight part to the load-bearing part. A straight-moving frame corresponding to the middle section of the arc-shaped main frame, an oil storage cylinder and a slide seat corresponding to another first limit wire wheel are arranged in the internal position of the mounting frame. The slide seat and the straight-moving frame are slidably connected on the mounting frame along the length direction of the mounting frame, and the slide seat and the other first limit wire wheel are rotatably connected.

2. The short-distance balancing brake structure used in a villa elevator according to claim 1 is characterized in that: The arrangement position of the brake pad arc frame corresponds to the outer wall position of the transmission wheel.

3. The short-distance balancing brake structure used in a villa elevator according to claim 1 is characterized in that: A bidirectional oil cylinder corresponding to the second limiting wire wheel is installed on the installation frame, and the traction wire rope is sequentially wound around the second limiting wire wheel close to the inner side of the bidirectional oil cylinder and the first limiting wire wheel away from the outer side of the arc-shaped main frame.

4. The short-distance balancing brake structure used in a villa elevator according to claim 1 is characterized in that: The horizontal distance between the first limiting wire wheel and the second limiting wire wheel corresponding to the position on one side of the installation frame is set to A, and the horizontal distance between the first limiting wire wheel and the second limiting wire wheel corresponding to the position on the other side of the installation frame is set to B.

5. The short-distance balancing brake structure used in a villa elevator according to claim 4 is characterized in that: The length along the horizontal direction between the center point of the first limiting wire wheel, the second limiting wire wheel and the center point of the traction wheel is greater than the radius of the traction wheel, and A is not equal to B.

6. The short-distance balancing brake structure used in a villa elevator according to claim 1 is characterized in that: A driving gear is arranged inside the straight frame, the center point of the driving gear is fixedly connected to the middle section of the arc-shaped frame, and the driving gear is meshed with one side of the inner wall of the straight frame.

7. The short-distance balancing brake structure used in a villa elevator according to claim 6 is characterized in that: An auxiliary oil cylinder corresponding to the straight-moving frame is installed on the installation frame, and the auxiliary oil cylinder is communicated with the oil cavity inside the bidirectional oil cylinder.

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