Brake device and lift

Abstract

The present invention discloses a braking device and a lift. The braking device of the present invention includes a wedge block assembly, a braking assembly, a speed limiting mechanism, and an elastic assembly. The speed limiting mechanism includes a driving member. The driving member is connected to the elastic assembly, and the elastic assembly is fixed on the lift. When the acceleration of the lift changes, the driving member displaces relative to the lift. The driving member is connected to the braking assembly, so as to drive the braking assembly to move. When the acceleration reaches the threshold, the driving member drives the braking assembly to clamp the guide rail with the wedge block assembly. The braking device provided by the embodiment of the present invention does not need to be paired with a speed limiter, can be triggered in real time according to the acceleration of the lift by itself, has a simple structure, and can achieve braking when the speed of the lift is relatively low. The lift of the present invention includes the aforementioned braking device, can achieve braking when the speed is relatively low, is safe and reliable, and effectively avoids crashing or overshooting.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a braking device and an elevator. Background Art

[0002] At present, in order to prevent falling or overshooting, elevators are equipped with speed limiters and safety clamps. When the elevator reaches the preset speed of the speed limiter, the safety clamp is triggered to brake the elevator mechanism. However, it is difficult to control the preset speed of the speed limiter, and the response time of the safety clamp is long. When the speed of the elevator is less than the preset speed, the safety clamp cannot be triggered to brake, and safety is difficult to guarantee. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a braking device that can trigger braking according to the acceleration of the elevator in real time.

[0004] The present invention also provides an elevator having the above braking device.

[0005] According to an embodiment of the first aspect of the present invention, the braking device includes:

[0006] A wedge block assembly, the wedge block assembly includes a first wedge block and a second wedge block, and the first wedge block and the second wedge block are respectively used to be fixed on both sides of the guide rail of the elevator;

[0007] A braking assembly, the braking assembly includes a first braking member and a second braking member, the first braking member can be clamped between the first wedge block and the guide rail, and the second braking member can be clamped between the guide rails;

[0008] A speed limiting mechanism, the speed limiting mechanism includes a driving member, the driving member is respectively connected to the first braking member and the second braking member, and the driving member is used to drive the first braking member and the second braking member to move. The speed limiting mechanism is configured such that when the body of the elevator accelerates, the direction of movement of the driving member relative to the body is opposite to the direction of movement of the body, and when the elevator decelerates, the direction of movement of the driving member relative to the body is the same as the direction of movement of the body;

[0009] An elastic assembly, the elastic assembly is connected to the driving member, the elastic assembly is used to connect the elevator, and the elastic force of the elastic assembly on the driving member is opposite to the direction of movement of the driving member relative to the elevator.

[0010] The braking device according to the embodiments of the present invention has at least the following beneficial effects: The driving member is connected to the elastic member, and the elastic assembly is fixed on the lift. When the acceleration of the lift changes, the driving member moves relative to the lift. The driving member is connected to the braking assembly, so as to drive the braking assembly to move. When the acceleration reaches the threshold value, the driving member drives the braking assembly to clamp the guide rail along the wedge block assembly. The braking device provided by the embodiments of the present invention does not need to be paired with a speed limiter, can be triggered in real time according to the acceleration of the lift by itself, has a simple structure, and can achieve braking when the speed of the lift is relatively low, which is safe and reliable.

[0011] According to some embodiments of the present invention, the elastic assembly includes a plurality of spring groups. Each spring group includes a first spring and a second spring. The upper end of the first spring is used to connect to the body, the lower end of the first spring is connected to the driving member, the upper end of the second spring is connected to the driving member, and the lower end of the second spring is used to connect to the body.

[0012] According to some embodiments of the present invention, the spring groups are arranged on both sides of the driving member and are symmetrical to each other.

[0013] According to some embodiments of the present invention, the speed limiting mechanism further includes a fixing belt. The driving member includes a roller and a rotating shaft. The rotating shaft is connected to the elastic assembly, the roller is connected to the fixing belt, and the fixing belt can make the roller rotate as the rotating shaft moves up and down.

[0014] According to some embodiments of the present invention, the speed limiting mechanism further includes a first tensioning wheel and a second tensioning wheel. The first tensioning wheel and the second tensioning wheel are respectively used to connect to the body. The first tensioning wheel and the second tensioning wheel are respectively arranged on both sides of the driving member corresponding to the moving direction of the driving member to tension the fixing belts on both sides of the driving member.

[0015] According to some embodiments of the present invention, the first wedge block is provided with a first guiding surface, the second wedge block is provided with a second guiding surface, and the distance between the first guiding surface and the second guiding surface decreases from one end to the other end.

[0016] According to some embodiments of the present invention, the first wedge block is provided with a first guiding surface, the second wedge block is provided with a second guiding surface, and the distance between the first guiding surface and the second guiding surface decreases from the middle to both ends.

[0017] According to some embodiments of the present invention, both the first braking member and the second braking member include a roller body. The first guiding surface is in rolling contact with the roller body of the first braking member, and the second guiding surface is in rolling contact with the roller body of the second braking member.

[0018] The lift according to the second aspect embodiments of the present invention includes:

[0019] Machine body;

[0020] Guide rail, the machine body is connected to the guide rail and can move up and down along the guide rail;

[0021] For the braking device according to the first aspect embodiment of the present invention, the first braking member is arranged between the guide rail and the first wedge block, the second braking member is arranged between the guide rail and the second wedge block, the first wedge block, the second wedge block are connected to the machine body and arranged on both sides of the guide rail, and the elastic component is connected to the machine body.

[0022] According to some embodiments of the present invention, the dimension of the first braking member in the direction of the distance between the first wedge block and the guide rail is between the minimum distance and the maximum distance between the first wedge block and the guide rail; the dimension of the second braking member in the direction of the distance between the second wedge block and the guide rail is between the minimum distance and the maximum distance between the second wedge block and the guide rail.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0024] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0025] Figure 1 is a schematic diagram of the braking device in an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the braking device in the accelerated descent state or the decelerated ascent state in an embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the braking state of the braking device in an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of the braking device in another embodiment of the present invention.

[0029] Reference Signs:

[0030] Guide rail 10, first wedge block 110, first guiding surface 111, second wedge block 120, second guiding surface 121, first braking member 210, first connecting member 211, second braking member 220, second connecting member 221, driving member 310, first tensioning wheel 311, second tensioning wheel 312, fixed belt 313, rotating shaft 314, roller 315, first spring group 410, second spring group 420, first spring 411, second spring 412. Detailed Description of the Embodiments

[0031] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms related to orientation, such as up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] In the description of the present invention, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, words such as "arrangement", "installation", "connection", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0035] In the description of the present invention, the description referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] Referring to Figure 1 , an embodiment of the present invention provides a braking device, including a wedge block assembly, a braking assembly, a speed limiting mechanism, and an elastic assembly. The wedge block assembly includes a first wedge block 110 and a second wedge block 120. The first wedge block 110 and the second wedge block 120 are respectively fixed on both sides of the guide rail 10. The braking assembly includes a first braking member 210 and a second braking member 220. The first braking member 210 can be clamped between the first wedge block 110 and the guide rail 10, and the second braking member 220 can be clamped between the second wedge block 120 and the guide rail 10. Thus, the first braking member 210 and the second braking member 220 clamp both sides of the guide rail 10 to achieve braking.

[0037] Among them, the dimension of the first braking member 210 in the direction of the distance between the first wedge block 110 and the guide rail 10 is between the minimum distance and the maximum distance between the first wedge block 110 and the guide rail 10 of the elevator. Therefore, when the first braking member 210 reaches a position smaller than the dimension in the direction of the distance between the first wedge block 110 and the guide rail 10, the first braking member 210 contacts the first wedge block 110 and the guide rail 10 simultaneously and is clamped between the first wedge block 110 and the guide rail 10. The second braking member 220 is clamped with the second wedge block 120 to clamp the other side of the guide rail in the same way. Since both sides of the guide rail 10 are clamped, the machine body can no longer rise or fall, achieving braking.

[0038] The speed limiting mechanism includes a driving member 310, and the driving member 310 is connected to the first braking member 210 and the second braking member 220. The connection form between the driving member 310 and the first braking member 210 and the second braking member 220 can be a rigid connection or a hinge connection. For example, referring to Figure 1 , in some embodiments of the present invention, the braking device further includes a first connecting member 211 and a second connecting member 221. One end of the first connecting member 211 is hinged to the driving member 310, and the other end of the first connecting member 211 is connected to the first braking member 210. One end of the second connecting member 221 is hinged to the driving member 310, and the other end of the second connecting member 221 is connected to the second braking member 220. Therefore, the included angle between the first connecting member 211 and the driving member 310 and the connecting included angle between the second connecting member 221 and the driving member 310 will change with the position of the driving member 310, so that the distance between the first braking member 210 and the second braking member 220 changes to adapt to the distance change between the first guiding surface 111 and the guide rail 10 and the distance change between the second guiding surface 121 and the guide rail 10. Among them, both the first connecting member 211 and the second connecting member 221 are rigid members.

[0039] The driving member 310 can move relative to the guide rail. While the driving member 310 moves, it can drive the first braking member 210 and the second braking member 220 to rise or fall. The driving member 310 can be arranged above the first braking member 210 and the second braking member 220, or below the first braking member 210 and the second braking member 220, or at the same height as the first braking member 210 and the second braking member 220.

[0040] The driving member 310 in the speed limiting mechanism can move relative to the body. When the speed of the body changes, the speed change of the driving member 310 in the speed limiting mechanism will lag behind the speed change of the body. For example, when the body accelerates upward, the upward speed of the driving member 310 will be less than the upward speed of the body. After the body stops accelerating, the speed of the driving member 310 will take some time to be the same as the speed of the body. When the driving member 310 is following the movement of the body, there are other energy conversions for the driving member 310, and the speed change of the driving member 310 will lag behind the speed change of the body. For example, when the driving member 310 is following the movement of the body, it also needs to rotate to achieve up and down movement.

[0041] Therefore, when the body accelerates, the moving direction of the driving member 310 relative to the body is opposite to the moving direction of the body. Among them, when the body accelerates downward, the driving member 310 will move upward relative to the body because its speed change is less than that of the body; when the body accelerates upward, the driving member 310 will move downward relative to the body because its speed change is less than that of the body. When the body decelerates, the moving direction of the driving member 310 relative to the body is the same as the moving direction of the body. Among them, when the body decelerates downward, the driving member 310 will move downward relative to the body because its speed change is less than that of the body; when the body decelerates upward, the driving member 310 will move upward relative to the body because its speed change is less than that of the body.

[0042] The elastic component can undergo elastic deformation. The elastic component is fixed on the body, and the elastic component is connected to the driving member 310. When the driving member 310 undergoes displacement, the driving member 310 will cause the elastic component to undergo elastic deformation, and the elastic force generated by the elastic component is always opposite to the direction of the displacement of the driving member 310 relative to the body. When the direction of the displacement of the driving member 310 relative to the body is the upward direction, the elastic force generated by the elastic component is the downward direction. When the direction of the displacement of the driving member 310 relative to the body is the downward direction, the elastic force generated by the elastic component is the upward direction.

[0043] Refer to Figure 2 , when the body is accelerating downward or decelerating upward, the driving member 310 moves downward relative to the body. At this time, the force of the elastic component on the driving component is a downward force, which will prevent the driving member 310 from rising, and the greater the displacement of the driving member 310 relative to the body, the greater the elastic force of the elastic component. When the force of the acceleration provided by the body to the driving member 310 is less than the elastic force generated by the elastic component, the driving member 310 will no longer move. The situation of the body accelerating upward or decelerating downward is the opposite.

[0044] When the acceleration of the body decreases, the force of the acceleration provided by the body to the driving member 310 will also decrease. The elastic force of the elastic component will cause the driving member 310 to move in the opposite direction of the displacement of the driving member 310 relative to the body. When reaching equilibrium, the driving member 310 will return to the initial position. Refer to Figure 1, the initial position is the position of the driving member 310 when the body is in a static or uniform motion state.

[0045] Refer to Figure 3 , when the acceleration of the body is large enough, the position where the driving member 310 can move by overcoming the elastic force of the elastic component is long enough to reach the clamping position. The clamping position is the position of the driving member 310 when the first braking member 210 and the second driving member 310 clamp both sides of the guide rail 10 at the same time. At this time, the braking device is in a braking state. Since the first braking member 210 and the second braking member 220 are clamped, the elastic force of the elastic component cannot make the driving member 310 connected to the first braking member 210 and the second braking member 220 return to the initial position. At this time, the braking state can be released through manual maintenance.

[0046] Therefore, according to the usage situation of the body, an acceleration threshold can be set. When the acceleration of the body is less than the preset acceleration value, the driving member 310 cannot move anymore after moving to a certain position due to the elastic force of the elastic component. When the acceleration of the body decreases further, the elastic component will make the driving member 310 move in the opposite direction of the relative displacement direction of the driving member 310 with respect to the body. When the acceleration of the body disappears, the driving member 310 will be pushed back to the initial position by the elastic component. When the acceleration of the body reaches the acceleration threshold, the driving member 310 can move to the clamping position to achieve braking. When the body crashes or hits the top, the acceleration of the body is greater than the acceleration during normal startup or shutdown. The preset acceleration threshold should be greater than the acceleration value during normal startup or shutdown of the body.

[0047] The elastic coefficient of the elastic component or the distance that the driving member 310 moves to the clamping position is set according to the predetermined acceleration threshold. The greater the elastic coefficient of the elastic component, the greater the resistance to the driving member 310 moving the same distance, and the acceleration of the body needs to reach a larger value for the driving member 310 to push or pull the braking component to the clamping position. The longer the distance that the driving member 310 moves to the clamping position, the greater the resistance of the elastic component to the driving member 310, and the acceleration of the body needs to reach a larger value for the driving member 310 to push or pull the braking component to the clamping position. Therefore, for elevators in different application scenarios, the elastic coefficient of the elastic component can be adjusted to set different acceleration thresholds to meet the braking requirements of various elevators. In embodiments with the same elastic coefficient of the elastic component, the larger the acceleration threshold, the longer the distance that the driving member 310 moves to the clamping position.

[0048] During the normal operation of the braking device in the embodiments of the present invention, the braking device can automatically adjust the position of the driving member 310. When the elevator operates abnormally, the driving member 310 will drive the first braking member 210 and the second braking member 220 to reach the clamping position to clamp the guide rail, thereby achieving braking. The entire braking device does not need to be equipped with a speed limiter and can be triggered in real time according to the acceleration of the elevator by itself. It has a simple structure and can achieve braking when the elevator speed is relatively low, which is safe and reliable.

[0049] In some embodiments of the present invention, the elastic component includes a plurality of springs. One end of the spring is connected to the body, and the other end of the spring is connected to the body. Therefore, during the movement of the driving member 310, the spring will be compressed or stretched, thereby the spring hinders the movement of the driving member 310. The connection method between the spring and the driving member 310 can be that the lower end of the spring is connected to the driving member 310, or the upper end of the spring is connected to the driving member 310. The spring can be arranged on one side of the driving member 310, or springs can be arranged on both sides of the driving member 310.

[0050] In some embodiments of the present invention, the elastic component includes a plurality of spring groups, and the spring group includes a first spring 411 and a second spring 412. The upper end of the first spring 411 is connected to the body, the lower end of the first spring 411 is connected to the driving member 310, the upper end of the second spring 412 is connected to the driving member 310, and the lower end of the second spring 412 is connected to the body. When the driving member 310 moves Figure 1 in the upward or downward direction as shown, both the first spring 411 and the second spring 412 will generate a force opposite to the moving direction to hinder their relative movement, thereby preventing the driving member 310 from changing its position too quickly, making the movement of the driving member 310 more stable, and improving the reliability of the braking system. In addition, when the driving member 310 is in the initial position, the first spring 411 and the second spring 412 jointly bear the gravity of the driving member 310, the first braking member 210, and the second braking member 220, avoiding the large elastic deformation of a single spring bearing weight and resulting in spring fatigue failure.

[0051] In some embodiments of the present invention, a plurality of spring groups are symmetrically arranged on both sides of the driving member 310, which can make the driving member 310 rise or fall more smoothly, and make the displacements of the driving member 310 driving the first braking member 210 and the second braking member 220 synchronous.

[0052] In some embodiments of the present invention, the spring groups are arranged on both sides of the driving member 320 and are symmetrical to each other. For example, referring to Figure 1 , the elastic component includes two spring groups: a first spring group 410 and a second spring group 420. The first spring group 410 and the second spring group 420 are arranged on both sides of the driving member 310 and are symmetrical to each other, so that the driving member 310 rises or falls more smoothly.

[0053] In some embodiments of the present invention, the speed limiting mechanism further includes a fixing belt 313. The driving member 310 includes a roller 315 and a rotating shaft 314. The rotating shaft 314 is connected to the elastic component, and the roller 315 is connected to the fixing belt 313, and the fixing belt 313 can cause the roller 315 to rotate as the rotating shaft 314 moves up and down. The fixing belt 313 is vertically arranged and can complete the movement of the driving member 310 during the entire lifting and lowering process of the machine body. When the machine body accelerates upward or downward, the driving member 310 on the fixing belt 313 will also have a corresponding acceleration trend. However, the acceleration of the driving member 310 still needs to be achieved through the rotation of the roller 315. Therefore, the acceleration of the driving member 310 will be less than the acceleration of the machine body, so that the driving member 310 will move relative to the machine body along the fixing belt 313. It can be understood that the fixing belt 313 can be a chain, a rope or a belt.

[0054] In some embodiments of the present invention, the speed limiting mechanism includes a first tensioning wheel 311 and a second tensioning wheel 312. The first tensioning wheel 311 and the second tensioning wheel 312 are respectively arranged above and below the driving member 310 and are symmetrical to each other. The first tensioning wheel 311 and the second tensioning wheel 312 are respectively connected to the machine body. The first tensioning wheel 311 and the second tensioning wheel 312 are connected by a fixing belt 313 to tension the fixing belts 313 on the upper and lower sides of the driving member 310. The tensioning effect of the first tensioning wheel 311 and the second tensioning wheel 312 can prevent the roller 315 from slipping during the rolling process. The first tensioning wheel 311 and the second tensioning wheel 312 are symmetrically arranged on the upper and lower sides of the driving member 310. The resultant force direction of the force exerted by the fixing belt 313 on the driving member 310 in the initial position is Figure 1 as shown in the left-right direction, reducing the force exerted by the fixing belt 313 on the driving member 310 in the up-down direction in the initial position.

[0055] In some embodiments of the present invention, the first wedge 110 is provided with a first guiding surface 111, and the second wedge 120 is provided with a second guiding surface 121. The distances between the first guiding surface 111, the second guiding surface 121 and the guide rail 10 decrease from one end to the other end. By providing the guiding surfaces, the braking member can move along the guiding surfaces of the wedges. Since the distances between the first guiding surface 111, the second guiding surface 121 and the guide rail 10 decrease from one end to the other end, finally the first braking member 210 and the second braking member 220 will clamp the guide rail 10. By providing the guiding surfaces, it can be prevented that the braking member is displaced during the rising or falling process, resulting in failure to clamp.

[0056] Refer to Figure 4, wherein the distances between the first guiding surface 111, the second guiding surface 121 and the guide rail may decrease from the lower end to the upper end or from the upper end to the lower end. When the distances between the first guiding surface 111, the second guiding surface 121 and the guide rail decrease from the lower end to the upper end, the driving member 310 drives the first braking member 210 and the second braking member 220 to move upward to clamp the guide rail, and the braking device can achieve braking when the elevator accelerates downward. When the distances between the first guiding surface 111, the second guiding surface 121 and the guide rail decrease from the upper end to the lower end, the driving member 310 drives the first braking member 210 and the second braking member 220 to move downward to clamp the guide rail, and the braking device can achieve braking when the elevator accelerates upward.

[0057] In some embodiments of the present invention, the first wedge 110 is provided with a first guiding surface 111, the second wedge 120 is provided with a second guiding surface 121, and the distances between the first guiding surface 111, the second guiding surface 121 and the guide rail 10 decrease from the middle to both ends. The initial position of the first braking member 210 is set in the middle of the first wedge 110, the initial position of the second braking member 220 is set in the middle of the second wedge 120, and the driving member can drive the first braking member 210 and the second braking member 220 to move upward or downward to clamp the guide rail, and the entire braking device can achieve two-way braking of the elevator.

[0058] Referring to Figure 1 , in some embodiments of the present invention, both the first braking member 210 and the second braking member 220 include a connecting member and a roller body. The connecting member is connected to the driving member 310, and the roller body is connected to the connecting member and can rotate relative to the connecting member. Thus, when the roller body of the first braking member 210 is placed between the first wedge 110 and the guide rail 10, the first guiding surface 111 is in rolling contact with the roller body of the first braking member 210, and when the roller body of the second braking member 220 is placed between the second wedge 120 and the guide rail 10, the roller body of the second braking member 220 is in rolling contact with the second guiding surface 121. Therefore, the frictional forces received by the first braking member 210 and the second braking member 220 during the lifting process are small, the resistance for the first braking member 210 and the second braking member 220 to rise or fall is small, thereby improving the reliability of the braking device

[0059] The present invention also provides an elevator, including a machine body, a guide rail 10 and the braking device in the above embodiments. The machine body is connected to the guide rail 10 and can move up and down along the guide rail 10. The first wedge 110 and the second wedge 120 are arranged on both sides of the guide rail 10. The first braking member 210 is arranged between the guide rail 10 and the first wedge 110, the second braking member 220 is arranged between the guide rail 10 and the second wedge 120, and the elastic component is connected to the machine body.

[0060] In some embodiments of the present invention, the dimension of the first braking member 210 in the direction of the distance between the first wedge block 110 and the guide rail 10 is between the minimum distance and the maximum distance between the first wedge block 110 and the guide rail 10, and the dimension of the second braking member 220 in the direction of the distance between the second wedge block 120 and the guide rail 10 is between the minimum distance and the maximum distance between the second wedge block 120 and the guide rail 10. Therefore, when the first braking member 210 reaches a position smaller than the dimension in the direction of the distance between the first wedge block 110 and the guide rail 10, the first braking member 210 contacts and clamps both the first wedge block 110 and the guide rail 10 simultaneously. The second braking member 220 cooperates with the second wedge block 120 to clamp the other side of the guide rail in the same way. Due to the huge frictional forces on both sides of the guide rail 10, the lift cannot rise or fall any further, achieving braking.

[0061] It can be understood that the lift in the embodiments of the present invention can be various types of machinery and equipment such as passenger lifts, freight lifts, and lifting platforms. The lift provided by the present invention includes the braking device in the foregoing embodiments, with a fast braking response speed, capable of achieving braking at a relatively low speed, being safe and reliable, and effectively avoiding crashes or overshoots.

[0062] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A braking device, characterized in that, Comprising: A wedge block assembly including a first wedge block and a second wedge block, which are respectively used to be fixed on both sides of the guide rail of the elevator; A braking assembly including a first braking member and a second braking member. The first braking member can be clamped between the first wedge block and the guide rail, and the second braking member can be clamped between the guide rails; A speed limiting mechanism including a driving member. The braking device further includes a first connecting member and a second connecting member. One end of the first connecting member is hinged to the driving member, and the other end is connected to the first braking member; one end of the second connecting member is hinged to the driving member, and the other end is connected to the second braking member; the driving member is used to drive the first braking member and the second braking member to move. The speed limiting mechanism is configured such that when the body of the elevator accelerates, the direction of movement of the driving member relative to the body is opposite to the direction of movement of the body, and when the elevator decelerates, the direction of movement of the driving member relative to the body is the same as the direction of movement of the body; An elastic assembly connected to the driving member, which is used to connect the elevator, and the elastic force of the elastic assembly on the driving member is opposite to the direction of movement of the driving member relative to the elevator.

2. The braking device according to claim 1, characterized in that, The elastic assembly includes a plurality of spring groups. Each spring group includes a first spring and a second spring. The upper end of the first spring is used to connect to the body, the lower end of the first spring is connected to the driving member, the upper end of the second spring is connected to the driving member, and the lower end of the second spring is used to connect to the body.

3. The braking device according to claim 2, characterized in that, The spring groups are arranged on both sides of the driving member and are symmetrical to each other.

4. The braking device according to claim 1, characterized in that, The speed limiting mechanism further includes a fixing belt. The driving member includes a roller and a rotating shaft. The rotating shaft is connected to the elastic assembly, the roller is connected to the fixing belt, and the fixing belt can cause the roller to rotate as the rotating shaft moves up and down.

5. The braking device according to claim 4, characterized in that, The speed limiting mechanism further includes a first tensioning wheel and a second tensioning wheel, which are respectively used to be connected to the body. The first tensioning wheel and the second tensioning wheel are respectively arranged on both sides of the driving member corresponding to the moving direction of the driving member to tension the fixing belt on both sides of the driving member.

6. The braking device according to claim 1, characterized in that, The first wedge block is provided with a first guiding surface, and the second wedge block is provided with a second guiding surface. The distance between the first guiding surface and the second guiding surface decreases from one end to the other end.

7. The braking device according to claim 1, characterized in that, The first wedge block is provided with a first guiding surface, and the second wedge block is provided with a second guiding surface. The distance between the first guiding surface and the second guiding surface decreases from the middle to both ends.

8. The braking device according to claim 6 or 7, characterized in that, Both the first braking member and the second braking member include roller bodies. The first guiding surface is in rolling contact with the roller body of the first braking member, and the second guiding surface is in rolling contact with the roller body of the second braking member.

9. An elevator, characterized in that, Comprising: A body A guide rail, the body is connected to the guide rail and can move up and down along the guide rail; The braking device according to any one of claims 1 to 8, wherein the first wedge block, the second wedge block are connected to the body and arranged on both sides of the guide rail, the first braking member is arranged between the guide rail and the first wedge block, the second braking member is arranged between the guide rail and the second wedge block, and the elastic component is connected to the body.

10. The elevator according to claim 9, characterized in that, The dimension of the first braking member in the direction of the distance between the first wedge block and the guide rail is between the minimum distance and the maximum distance between the first wedge block and the guide rail; the dimension of the second braking member in the direction of the distance between the second wedge block and the guide rail is between the minimum distance and the maximum distance between the second wedge block and the guide rail.

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