Braking force device and elevator

Abstract

The invention relates to a brake force device and an elevator. During braking, a friction element moves upward relative to a support along a first direction. During the movement, the friction element generates relative movement relative to a moving elastic component along a first direction and a second direction, respectively, and exerts a force on the moving elastic component along the first direction and the second direction, and also frictionally abuts against a counter element. Since there is a force between the friction element and the moving elastic component along the second direction, a positive pressure is generated on the friction element, increasing the friction force between the friction element and the counter element. As the movement continues, the friction force between the friction element and the counter element balances the elastic force of a constant force elastic component, and reaches the constant elastic force set by the constant force elastic component. Therefore, within the designed range of the friction coefficient, regardless of the change of the friction coefficient of the counter element, the braking friction force is consistent or substantially consistent with the set constant elastic force. In this way, the safety and reliability of braking under different working conditions are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of elevator braking technology, in particular to a braking force device and an elevator. BACKGROUND

[0002] The braking force device is an important device in the elevator equipment and is an important component of the safety protection function of the elevator. The braking force device is generally installed at the lower part of both sides of the elevator car. When the elevator slides or falls at a speed reaching the action speed of the speed limiter in a fault state, the speed limiter controls the braking force device to stop the elevator car safely and clamp the elevator car on the counterpart, thereby avoiding accidents and improving the safety factor of the elevator.

[0003] Due to different processing methods, surface protection, working conditions, manufacturing errors, or external factors such as rust and dirt, the change of the friction factor will exist in a large range, which causes the traditional braking force device to be unable to meet the safe stopping under all working conditions, seriously affecting the braking capacity, especially in the elevator market, the original old elevator counterpart is more diverse, and it is impossible to perform one-by-one matching test, and the safety gear is easily selected to cause the risk of being unable to stop the elevator. Therefore, it is of great economic value and social benefit to study and solve how the braking force device meets the safe braking of the counterpart with different friction coefficients. SUMMARY

[0004] Therefore, it is necessary to provide a braking force device and an elevator, which can meet the safe braking of a large range of different friction coefficients and ensure the safety and reliability of braking under different working conditions.

[0005] A braking force device, comprising: a counterpart extending in a first direction; and a braking mechanism arranged on at least one side of the counterpart in a second direction, wherein the braking mechanism comprises a bracket, a moving elastic component, a friction element, and a constant force elastic component, the moving elastic component is arranged in the bracket and can move in the first direction, the friction element is located between the moving elastic component and the counterpart and elastically abuts the moving elastic component in the second direction, the constant force elastic component is connected between the moving elastic component and the bracket and applies an elastic force in the first direction to the moving elastic component, and the first direction intersects the second direction; when the friction element moves relative to the bracket in the first direction, the friction element abuts the counterpart and applies an action force to the moving elastic component in the first direction and the second direction, and the elastic force of the constant force elastic component to the moving elastic component reaches the constant elastic force of the constant force elastic component.

[0006] In the aforementioned braking device, during braking, the friction element moves upward relative to the support in a first direction. During this movement, the friction element experiences relative motion with the moving elastic component in both the first and second directions, applying forces to the moving elastic component in both directions, while simultaneously abutting against the mating component. Because of the force between the friction element and the moving elastic component in the second direction, a positive pressure is generated on the friction element, increasing the friction between the friction element and the mating component. As the movement continues, the friction between the friction element and the mating component balances with the elastic force of the constant-force elastic component, reaching the constant elastic force set by the constant-force elastic component. Therefore, within the designed friction coefficient range, regardless of changes in the friction coefficient of the mating component, the braking friction will be consistent with or approximately consistent with the set constant elastic force. Thus, the braking friction of the braking device of this application, set by the constant-force elastic component, is unaffected by changes in the friction coefficient, thereby satisfying safe braking with a wide range of different friction coefficients and ensuring safe and reliable braking under various operating conditions.

[0007] In some embodiments, the braking device further includes a stop on the bracket, the stop being positioned above the friction element in the first direction, and the constant force elastic component exerts a preset constant elastic force on the moving elastic component before the friction element abuts against the stop.

[0008] In some embodiments, when the coefficient of friction between the friction element and the mating member is configured to be the minimum value among preset coefficients, and the friction force between the friction element and the mating member reaches the preset constant elastic force, the distance between the friction element and the stop member is denoted as T1, where T1≥0.

[0009] In some embodiments, when the friction coefficient between the friction element and the mating member is configured to the maximum value among preset coefficients, and the friction force between the friction element and the mating member reaches a preset constant elastic force, the distance between the friction element and the stop member is denoted as T2, where T2>T1.

[0010] In some embodiments, the constant force elastic component includes a force guide and a first elastic component and a second elastic component disposed on the bracket. The first elastic component abuts against the movable elastic component along the first direction, the second elastic component extends along the second direction, and the force guide is rotatably connected to the movable elastic component and abuts against the second elastic component.

[0011] In some embodiments, the constant force elastic component further includes a support member and a limiting portion disposed on the support member. The support member is disposed on the second elastic member, and one end of the force guiding member abuts against the support member and contacts the limiting portion in the first direction.

[0012] In some embodiments, a side of the friction element facing the moving elastic assembly comprises an inclined surface, and the distance between the inclined surface and the counter element gradually increases along the first direction from the end of the friction element close to the constant-force elastic assembly.

[0013] In some embodiments, the moving elastic assembly comprises a first moving element, a second moving element, and a third elastic element, the first moving element is arranged in the support and is movable along the first direction, the second moving element is connected to the first moving element through the third elastic element and is movable along the second direction, the friction element is located between the second moving element and the counter element, and the constant-force elastic assembly is connected between the first moving element and the support along the first direction.

[0014] In some embodiments, the moving elastic assembly further comprises a first rolling element and a second rolling element, the first rolling element is arranged between the second moving element and the friction element, and the second rolling element is arranged between the first moving element and the support.

[0015] An elevator comprising the braking force device of any one of the above.

[0016] The elevator described above adopts the braking force device described above, and in the braking process, the friction element moves upward along the first direction relative to the support. In the moving process, the friction element produces relative movement in the first direction and the second direction relative to the moving elastic assembly, respectively, and exerts force on the moving elastic assembly along the first direction and the second direction, and also rubs against the counter element. Since the friction element and the moving elastic assembly have force in the second direction, a positive pressure is generated on the friction element, and the friction force between the friction element and the counter element is increased. With the continuation of the movement, the friction force between the friction element and the counter element will balance with the elastic force of the constant-force elastic assembly, and reach the constant elastic force set by the constant-force elastic assembly. Therefore, within the designed range of the friction coefficient, no matter how the friction coefficient of the counter element changes, the braking friction will be consistent or substantially consistent with the set constant elastic force. In this way, the braking friction of the braking force device of the present application is set by the constant-force elastic assembly and is not affected by the change of the friction coefficient, so as to meet the safe braking of a wide range of different friction coefficients and ensure the safety and reliability of the braking under different working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are provided to explain the present application and are not meant to limit the present application.

[0018] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these accompanying drawings without any creative effort.

[0019] Figure 1 The initial state of the braking force device is shown in the structure diagram.

[0020] Figure 2 The braking force device reaches the set constant elastic force, and the structure diagram is shown.

[0021] Figure 3 The stable state of the braking force device is shown in the structure diagram.

[0022] Figure 4 The constant elastic component is shown in the structure diagram.

[0023] 100, braking force device; 200, braking mechanism; 10, support; 11, bottom; 12, side; 13, top; 14, support part; 15, mounting groove; 20, counterpart; 30, friction element; 31, first rolling element; 32, inclined surface; 40, moving elastic component; 41, first moving element; 42, second moving element; 421, matching surface; 43, third elastic element; 44, second rolling element; 50, constant force elastic component; 51, first elastic element; 52, second elastic element; 53, support element; 54, limiting part; 55, force guide element; 551, swing rod part; 552, push head; 60, stop element; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0024] In order to make the technical solutions in the embodiments of the present application clearer, the accompanying drawings needed in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these accompanying drawings without any creative effort, therefore the present application is not limited to the specific embodiments disclosed below.

[0025] In some embodiments, please refer to Figure 1The application provides a brake force device 100, which comprises a pair of components 20 and a brake mechanism 200. The pair of components 20 extends along a first direction X, and the brake mechanism 200 is arranged on at least one side of the pair of components 20 along a second direction Y. The brake mechanism 200 comprises a bracket 10, a moving elastic component 40, a friction element 30 and a constant force elastic component 50. The moving elastic component 40 is arranged in the bracket 10 and can move along the first direction X. The friction element 30 is located between the moving elastic component 40 and the pair of components 20 and elastically abuts the moving elastic component 40 along the second direction Y. The constant force elastic component 50 is connected between the moving elastic component 40 and the bracket 10 and applies an elastic force to the moving elastic component 40 along the first direction X. The first direction X intersects the second direction Y. When the friction element 30 moves along the first direction X relative to the bracket 10, the friction element 30 abuts the pair of components 20 and applies forces to the moving elastic component 40 along the first direction X and the second direction Y, respectively. The elastic force of the constant force elastic component 50 on the moving elastic component 40 reaches the constant elastic force of the constant force elastic component 50.

[0026] In the above brake force device 100, during braking, the friction element 30 moves upward along the first direction X relative to the bracket 10. During the movement, the friction element 30 generates relative movement along the first direction X and the second direction Y relative to the moving elastic component 40, applies forces to the moving elastic component 40 along the first direction X and the second direction Y, and also abuts the pair of components 20. Since the friction element 30 and the moving elastic component 40 have forces along the second direction Y, a positive pressure is generated on the friction element 30, which increases the friction force between the friction element 30 and the pair of components 20. As the movement continues, the friction force between the friction element 30 and the pair of components 20 balances the elastic force of the constant force elastic component 50 and reaches the constant elastic force set by the constant force elastic component 50. Therefore, within the designed range of the friction coefficient, no matter how the friction coefficient of the pair of components 20 changes, the brake friction force is consistent or approximately consistent with the set constant elastic force. In this way, the brake friction of the brake force device 100 of the application is set by the constant force elastic component 50 and is not affected by the change of the friction coefficient, so as to meet the safe braking of a wide range of different friction coefficients and ensure the safe and reliable braking under different working conditions. Among them, the wide range is relative to the design of the traditional brake force device 100, which mostly only meets the design of the pair of components 20 with different friction coefficients in a small range.

[0027] It should be noted that when the elevator is in emergency braking, the friction element 30 moves upward relative to the support 10 along the first direction X, at this time the friction element 30 exerts a force on the moving elastic component 40 along the first direction X and the second direction Y. Conversely, the moving elastic component 40 also exerts a positive pressure on the friction element 30 along the second direction Y, so that the friction element 30 is in frictional abutment with the counter element 20. At the same time, the moving elastic component 40 can move in the first direction X, so that after the moving elastic component 40 is subjected to a force, the constant elastic component is compressed by the moving elastic component 40 in the first direction X, forming an elastic force opposite to the friction force.

[0028] With the continuation of relative movement, the elastic force reaches the constant elastic force of the constant elastic component, and according to the force balance relationship, it is equal to the friction force. Again, since the constant elastic component has no change or slight change in elastic force thereafter, the friction force after reaching equilibrium is not changing, and remains relatively constant, so that when designing the brake force device 100, the change of the friction coefficient of the counter element 20 can be guaranteed to keep the brake force relatively constant. At this time, no relative displacement occurs between the friction element 30 and the moving elastic component 40.

[0029] Of course, since the support 10 is installed on the car of the elevator, when emergency braking occurs, it is also understood that the support 10 moves downward relative to the friction element 30 along the first direction X, so that the moving elastic component 40 has a certain displacement relative to the friction element 30 along the first direction X and the second direction Y. Among them, in some specific embodiments, the first direction X and the second direction Y can be perpendicular to each other. At the same time, the brake mechanism 200 can include two, and the two brake mechanisms 200 are located on the opposite sides of the counter element 20.

[0030] It should be noted that the moving elastic component 40 refers to a structure that can move in the first direction X; at the same time, it can be elastically deformed in the second direction Y, so that when emergency braking occurs, the moving elastic component 40 exerts a positive pressure on the friction element 30, forming an effective friction force to perform safe braking.

[0031] At the same time, the constant elastic component 50 refers to a structure with elastic function, which will reach a constant elastic force when compressed to a certain deformation. At this time, if the deformation continues to be compressed, the elastic force will remain unchanged or change slightly. Its structure design can have various designs, as long as it can meet the output of constant elastic force, and the friction element 30 can abut to the stopper 60 within the stroke of outputting the constant elastic force.

[0032] In addition, the counterpart 20 can be understood as a guide rail structure in an elevator, and the friction coefficient on the counterpart 20 can change in a large range due to different processing methods, surface protection, working conditions, processing and manufacturing errors, or factors such as rust and dirt. Therefore, the traditional braking force device 100 cannot meet the design of the counterpart 20 under different working conditions and cannot guarantee a constant braking force. Therefore, the braking force device 100 introduced in the present application can effectively meet the design of different friction coefficients and guarantee a constant braking force.

[0033] Further, please refer to Figure 1 The braking force device 100 further comprises a stopper 60 arranged on the bracket 10, and the stopper 60 is located above the friction element 30 in the first direction X. When the friction element 30 abuts against the stopper 60, the elastic force of the constant force elastic component 50 on the moving elastic component 40 reaches a preset constant elastic force. As can be seen, please refer to Figure 2 When the constant force elastic component 50 reaches the preset constant elastic force, the friction force between the friction element 30 and the counterpart 20 is also a constant elastic force, and the braking force device 100 reaches a set force state. At this time, when the friction element 30 continues to rise, no relative displacement between the friction element 30 and the moving elastic component 40 in the first direction X is generated. Please refer to Figure 3 When the friction element 30 abuts against the stopper 60, the braking force device 100 is in a stable state and realizes stable braking. Since the elastic force of the constant force elastic component 50 no longer changes or changes slightly, the friction force between the friction element 30 and the counterpart 20 remains relatively unchanged, and a relatively constant braking force is realized.

[0034] It should be noted that the "relatively constant" in the present application means that through the constant force elastic component 50, when the braking force reaches the preset constant elastic force, the spring force provided by the constant force elastic component 50 does not change or changes slightly when the friction element 30 continues to move, and at this time the braking force generated by the friction element 30 is consistent with the constant elastic force set by the constant force elastic component 50. Therefore, regardless of the change of the friction coefficient of the counterpart 20, the braking friction force is consistent with the preset constant elastic force or has a slight deviation. Since the preset braking force is set by the constant force elastic component 50 and is not affected by the change of the friction coefficient, when the friction coefficient changes within a range, the preset braking force will not be affected, but since the constant force elastic component 50 will have a certain change in the resultant force, such as internal error of the constant force elastic component 50, the change in the resultant force will not change with the change of the friction coefficient, and can be considered as relatively constant.

[0035] In some embodiments, please refer to Figure 2When the friction coefficient between the friction element 30 and the counter element 20 is configured as the minimum value in the preset coefficient, and the friction force between the friction element 30 and the counter element 20 reaches the preset constant elastic force, the distance between the friction element 30 and the stop element 60 is recorded as T1, where T1≥0. Since the friction force F=μ×P, where μ is the friction coefficient and P is the normal pressure on the friction element 30, the smaller the friction coefficient, the greater the normal pressure, and at this time, the elastic deformation of the third elastic element 43 is ensured to be within the design range. The greater the relative displacement between the moving elastic assembly 40 and the friction element 30, the greater the required stroke. Therefore, in this embodiment, the friction coefficient is set to the minimum value in the preset coefficient, and under the premise of this friction coefficient, the distance between the friction element 30 and the stop element 60 is greater than or equal to 0, so that under different friction coefficients greater than the set minimum friction coefficient, the brake force reaches the constant elastic force before the friction element 30 abuts against the stop element 60, and a constant brake force is achieved.

[0036] In some embodiments, please refer to Figure 2 When the friction coefficient between the friction element 30 and the counter element 20 is configured as the maximum value in the preset coefficient, and the friction force between the friction element 30 and the counter element 20 reaches the preset constant elastic force, the distance between the friction element 30 and the stop element 60 is recorded as T2, where T2>T1. Since the friction coefficient is the maximum, the relative displacement between the moving elastic assembly 40 and the friction element 30 is the minimum, and the required stroke is the minimum. Therefore, in this embodiment, the friction coefficient is set to the maximum value in the preset coefficient, and under the premise of this friction coefficient, the distance T2 between the friction element 30 and the stop element 60 reaches the maximum value, and it is required that within the stroke range of T2, the variation value of the resultant force of the constant force elastic assembly 50 is within the constant force variation error range, so that under different friction coefficients less than the set maximum friction coefficient, the brake force does not change too much before the friction element 30 abuts against the stop element 60, and a constant brake force is achieved.

[0037] The friction coefficient between the friction element 30 and the counter element 20 can be selected in different ways, such as: the preset coefficient is 0.3-1, i.e., the preset coefficient can be but is not limited to 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.

[0038] In some embodiments, please refer to Figure 1The constant-force elastic assembly 50 comprises a force guide 55, a first elastic member 51 and a second elastic member 52 arranged on the support 10, the first elastic member 51 abuts against the moving elastic assembly 40 along the first direction X, and the second elastic member 52 extends along the second direction Y, and the force guide 55 is rotationally connected to the moving elastic assembly 40 and abuts against the second elastic member 52. Thus, when the friction element 30 is relatively raised, the first elastic member 51 is compressed along the first direction X, and at the same time, the second elastic member 52 is compressed along the second direction Y, and the force guide 55 transmits the force to the moving elastic assembly 40. When the resultant force of the constant-force elastic assembly 50 reaches a preset constant elastic force, the constant-force elastic assembly 50 is continuously compressed, the elastic force on the first elastic member 51 increases, but the angle between the force guide 55 and the first direction X increases due to the rotation of the force guide 55, so that the component of the second elastic member 52 along the first direction X decreases, so that the resultant force of the constant-force elastic assembly 50 remains unchanged or changes slightly, and the relative constant force is realized.

[0039] To facilitate force transmission, the force guide 55 can comprise a swing rod part 551 and a push head 552 arranged at one end of the swing rod part 551, the swing rod part 551 is rotationally connected to the moving elastic assembly 40 at one end, and the push head 552 abuts against the second elastic member 52.

[0040] Optionally, the first elastic member 51 and the second elastic member 52 can be, but are not limited to, a spiral spring, a gas spring or a compression spring.

[0041] Further, referring to Figure 1 The constant-force elastic assembly 50 further comprises a support 53 and a limiting part 54 arranged on the support 53, and the support 53 is arranged on the second elastic member 52. One end of the force guide 55 abuts against the support 53 and abuts against the limiting part 54 along the first direction X. In this way, through the support 53 and the limiting part 54, the force transmission between the force guide 55 and the second elastic member 52 is facilitated.

[0042] It should be noted that before the force guide 55 abuts against the limiting part 54, the force guide 55 moves along the first direction X on the support 53. In addition, referring to Figure 4 In other embodiments, if the support 53 is two, the two supports 53 are movably arranged on the support 10 along the second direction Y, and the second elastic member 52 is connected between the two supports 53.

[0043] In some embodiments, referring to Figure 1The side of the friction element 30 facing the moving elastic component 40 includes an inclined surface 32, and the distance between the inclined surface 32 and the counter element 20 gradually increases along the first direction X starting from the end of the friction element 30 close to the constant-force elastic component 50. Thus, when the friction element 30 rises relative to the support 10, the inclined surface 32 will push the moving elastic component 40 along the second direction Y, and at the same time, move along the first direction X. This not only compresses the constant-force elastic component 50, but also generates a positive pressure in the second direction Y, so that the friction element 30 forms a braking force on the counter element 20.

[0044] In some embodiments, referring to Figure 1 The moving elastic component 40 includes a first moving element 41, a second moving element 42, and a third elastic element 43. The first moving element 41 is arranged in the support 10 and can move along the first direction X. The second moving element 42 is connected to the first moving element 41 through the third elastic element 43 and can move along the second direction Y. The friction element 30 is located between the second moving element 42 and the counter element 20, and the constant-force elastic component 50 is connected between the first moving element 41 and the support 10 along the first direction X. Thus, during emergency braking, the second moving element 42 moves relative to the first moving element 41 in the second direction Y to generate a positive pressure, and the first moving element 41 moves in the first direction X to compress the constant-force elastic component 50, so that the friction force and the constant elastic force are balanced.

[0045] Further, referring to Figure 1 To facilitate cooperation with the inclined surface 32 of the friction element 30, the side of the second moving element 42 facing the friction element 30 includes a cooperation surface 421, which is inclinedly arranged, and the end of the cooperation surface 421 close to the constant-force elastic component 50 is closer to the counter element 20 than the other end.

[0046] In addition, to enable the moving elastic component 40 to move stably, the support 10 can include a bottom 11, a top 13, and a side 12 connected between the bottom 11 and the top 13. The bottom 11, the side 12, and the top 13 enclose to form a mounting groove 15, and the opening of the mounting groove 15 is arranged to face the counter element 20, and the moving elastic component 40 is arranged in the mounting groove 15. At the same time, the support 10 can also include a support portion 14 arranged on the bottom 11 and the side 12 and extending along the first direction X, and the first moving element 41 can move along the first direction X in the support portion 14.

[0047] In some embodiments, referring to Figure 1The mobile elastic assembly 40 further comprises a first rolling member 31 and a second rolling member 44. The first rolling member 31 is arranged between the second mobile member 42 and the friction element 30, and the second rolling member 44 is arranged between the first mobile member 41 and the support 10. In this way, the first mobile member 41 and the second mobile member 42 are respectively stably moved by the first rolling member 31 and the second rolling member 44, so that the braking effect is more stable, safe and reliable.

[0048] To illustrate the constant elastic force of the constant force elastic assembly 50, reference can be made to the parameters in Table 1 during braking. When the set constant elastic force is 1872 Kg, the change in compression of the first elastic member 51 is 0~21.2mm, and the change range of the resultant force is 1872 Kg~1880 Kg, and the maximum deviation is only 8 Kg. This theoretical deviation is very small, and the braking force can be considered relatively constant.

[0049] Table 1

[0050]

[0051] In Table 1, spring 1 is the first elastic member 51, spring 2 is the second elastic member 52, and side 12 spring is the third elastic member 43, and the guide rail is the counterpart 20 of the present application; and the rod length is the length of the guide member 55. In addition, P+Q in the table is the self weight and load of the elevator car. From Table 1, it can be seen that through the constant force elastic assembly 50, not only can the braking force be relatively constant, but also the self weight and load of the car can be selected in the range of 1900 Kg~2650 Kg during the design of the elevator, and the selection range is large, which is convenient for the safety design of the elevator.

[0052] In some embodiments, the present application provides an elevator, which comprises the braking force device 100 of any one of the above.

[0053] In the above-mentioned elevator, the brake force device 100 is used, and in the braking process, the friction element 30 moves upward relative to the support 10 along the first direction X. In the moving process, the friction element 30 generates relative movement relative to the moving elastic component 40 along the first direction X and the second direction Y, respectively, and exerts force on the moving elastic component 40 along the first direction X and the second direction Y, and also frictionally abuts against the counterpart 20. Since the friction element 30 and the moving elastic component 40 have force in the second direction Y, a positive pressure is generated on the friction element 30, and the friction force between the friction element 30 and the counterpart 20 is increased. With the continuation of the movement, the friction force between the friction element 30 and the counterpart 20 is balanced with the elastic force of the constant force elastic component 50, and reaches the constant elastic force set by the constant force elastic component 50. Therefore, within the designed range of the friction coefficient, no matter how the friction coefficient of the counterpart 20 changes, the braking friction force is consistent or substantially consistent with the set constant elastic force. In this way, the braking friction of the brake force device 100 of the present application is set by the constant force elastic component 50, and is not affected by the change of the friction coefficient, so as to meet the safe braking of different friction coefficients in a wide range, and ensure the safety and reliability of braking under different working conditions.

[0054] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0055] The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0057] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of indications of the technical features indicated. Thus, the technical features defined with "first", "second", etc. can explicitly or implicitly include at least one of the technical features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0058] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0060] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes, and do not represent the only embodiment.

Claims

1. A braking force device characterized by comprising: The brake force device comprises: a counter element (20) extending along a first direction (X); a brake mechanism (200) arranged on at least one side of the counter element (20) along a second direction (Y), wherein the brake mechanism (200) comprises a bracket (10), a moving elastic component (40), a friction element (30) and a constant force elastic component (50), the moving elastic component (40) is arranged in the bracket (10) and can move along the first direction (X), the friction element (30) is located between the moving elastic component (40) and the counter element (20) and elastically contacts the moving elastic component (40) along the second direction (Y), and the constant force elastic component (50) is connected between the moving elastic component (40) and the bracket (10) and applies an elastic force along the first direction (X) to the moving elastic component (40), wherein the first direction (X) intersects the second direction (Y); when the friction element (30) moves along the first direction (X) relative to the bracket (10), it will frictionally abut against the counter element (20) and apply an action force to the moving elastic component (40) along the first direction (X) and the second direction (Y), and the elastic force of the constant force elastic component (50) to the moving elastic component (40) reaches the constant elastic force of the constant force elastic component (50); the brake force device further comprises a stop element (60) arranged in the bracket (10), wherein the stop element (60) is located above the friction element (30) along the first direction (X), and before the friction element (30) abuts against the stop element (60), the elastic force of the constant force elastic component (50) to the moving elastic component (40) reaches a preset constant elastic force.

2. The braking force device according to claim 1, characterized by when the friction coefficient between the friction element (30) and the counter element (20) is configured as the minimum value in the preset coefficient, and the friction force between the friction element (30) and the counter element (20) reaches the preset constant elastic force, the distance between the friction element (30) and the stop element (60) is recorded as T1, wherein T1≥0.

3. The braking force device according to claim 2, characterized by when the friction coefficient between the friction element (30) and the counter element (20) is configured as the maximum value in the preset coefficient, and the friction force between the friction element (30) and the counter element (20) reaches the preset constant elastic force, the distance between the friction element (30) and the stop element (60) is recorded as T2, wherein T2>T1.

4. The braking force device according to claim 1, characterized by the constant force elastic component (50) comprises a force guide element (55) and a first elastic element (51) and a second elastic element (52) arranged on the bracket (10), the first elastic element (51) abuts against the moving elastic component (40) along the first direction (X), the second elastic element (52) extends along the second direction (Y), and the force guide element (55) is rotationally connected to the moving elastic component (40) and abuts against the second elastic element (52).

5. The braking force device according to claim 4, characterized by The constant force elastic assembly (50) further comprises a support (53) and a limiting part (54) arranged on the support (53), the support (53) is arranged on the second elastic member (52), one end of the force guide member (55) abuts against the support (53) and abuts against the limiting part (54) in the first direction (X).

6. The braking force device according to claim 4, characterized by The force guide member (55) comprises a swing rod part (551) and a push head (552) arranged at one end of the swing rod part (551), one end of the swing rod part (551) is rotationally connected to the moving elastic assembly (40), and the push head (552) abuts against the second elastic member (52).

7. A braking force device according to any one of claims 1 to 6, characterized in that One side of the friction element (30) facing the moving elastic assembly (40) comprises an inclined surface (32), the distance between the inclined surface (32) and the counter element (20) gradually increases along the first direction (X) from one end of the friction element (30) close to the constant force elastic assembly (50).

8. A braking force device according to any one of claims 1 to 6, characterized by The moving elastic assembly (40) comprises a first moving member (41), a second moving member (42) and a third elastic member (43), the first moving member (41) is arranged in the bracket (10) and can move along the first direction (X), the second moving member (42) is connected to the first moving member (41) through the third elastic member (43) and can move along the second direction (Y), the friction element (30) is located between the second moving member (42) and the counter element (20), and the constant force elastic assembly (50) is connected between the first moving member (41) and the bracket (10) along the first direction (X).

9. The braking force device according to claim 8, characterized by The moving elastic assembly (40) further comprises a first rolling member (31) and a second rolling member (44), the first rolling member (31) is arranged between the second moving member (42) and the friction element (30), and the second rolling member (44) is arranged between the first moving member (41) and the bracket (10).

10. An elevator characterized by The elevator comprises the brake force device according to any one of claims 1-9.

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