Braking force device and elevator

Abstract

According to the braking force device and the elevator, in the braking process, a friction element moves upwards in the first direction relative to a support. In the moving process, the friction element generates relative movement in the first direction and the second direction relative to the moving elastic assembly, acting force is applied to the moving elastic assembly in the first direction and the second direction, and meanwhile the friction element can abut against the mating plate in a friction mode. Due to the fact that acting force exists between the friction element and the movable elastic assembly in the second direction, positive pressure can be generated on the friction element, and the friction force between the friction element and the mating plate is increased. Along with the continuation of the movement, the friction force between the friction element and the mating plate can be balanced with the elastic force of the constant-force elastic assembly, and the constant elastic force set by the constant-force elastic assembly is achieved. Therefore, in the designed friction coefficient range, no matter how the friction coefficient of the mating plate changes, the braking friction force is consistent with or approximately consistent with the set constant elastic force. Therefore, safe and reliable braking under different working conditions is ensured.

Description

Technical Field

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

[0002] The brake force device is an important device in the elevator equipment and an important component of the elevator's safety protection function. It is generally installed at the lower part of both sides of the elevator car. When the elevator overspeeds or falls in a fault state and the speed reaches the speed of the speed limiter, the speed limiter operates the brake force device to stop the elevator car safely and clamp it on the dual part to avoid accidents. The safety factor of the elevator is higher.

[0003] Due to the different processing methods, surface protection, working conditions, processing and manufacturing errors of the mating parts, or the influence of external factors such as rust and oil, the change of friction factors will have a large range, resulting in the inability of traditional braking devices to meet the safe braking conditions under all working conditions, seriously affecting the braking capacity. Especially in the elevator modification market, the situation of the original old elevators and old mating parts is even more diverse, and it is impossible to conduct a one-to-one matching test. The rash selection of safety clamps is likely to lead to the risk of being unable to stop the elevator. Therefore, it is of great economic value and social benefit to study how the braking device can meet the safe braking of mating parts with different friction coefficients. Summary of the invention

[0004] Based on this, it is necessary to provide a braking force device and an elevator that can meet the safety braking requirements of a wide range of different friction coefficients and ensure safe and reliable braking under different working conditions.

[0005] A braking force device, the braking force device comprising: a dual member extending along a first direction; a braking mechanism arranged on at least one side of the dual member along a second direction, wherein the braking mechanism comprises a bracket, a movable elastic component, a friction element and a constant force elastic component, the movable elastic component is arranged in the bracket and can move along the first direction, the friction element is located between the movable elastic component and the dual member, and elastically abuts against the movable elastic component in the second direction, the constant force elastic component is connected between the movable elastic component and the bracket, and applies an elastic force along the first direction to the movable elastic component, and the first direction intersects with the second direction; when the friction element moves relative to the bracket along the first direction, it will frictionally abut against the dual member and apply a force to the movable elastic component in the first direction and the second direction respectively, and the elastic force of the constant force elastic component on the movable elastic component can reach the constant elastic force of the constant force elastic component.

[0006] In the above-mentioned braking force device, during the braking process, the friction element moves upward along the first direction relative to the bracket. During the movement, the friction element produces relative movement in the first direction and the second direction relative to the moving elastic component, exerts a force on the moving elastic component in the first direction and the second direction, and also frictionally abuts on the dual part. Since there is a 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 dual part. As the movement continues, the friction between the friction element and the dual part will balance with the elastic force of the constant force elastic component and reach the constant elastic force set by the constant force elastic component. Therefore, within the designed friction coefficient range, no matter how the friction coefficient of the dual part changes, the braking friction will be consistent or roughly 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 component 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 braking under different working conditions.

[0007] In some embodiments, the braking force device also includes a stopper provided on the bracket, wherein the stopper is located above the friction element in the first direction, and before the friction element abuts against the stopper, the elastic force of the constant force elastic component on the movable elastic component reaches a preset constant elastic force.

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

[0009] In some embodiments, when the friction coefficient between the friction element and the mating part is configured as the maximum value of the preset coefficients and the friction force between the friction element and the mating part reaches a preset constant elastic force, the distance between the friction element and the stopper is recorded as T2, where T2>T1.

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

[0011] In some embodiments, the constant force elastic component also includes a support member and a limiting portion provided on the support member, the support member is provided on the second elastic member, one end of the force guiding member rests on the support member and conflicts with the limiting portion in the first direction.

[0012] In some embodiments, a side of the friction element facing the movable elastic component includes an inclined surface, and the distance between the inclined surface and the mating member gradually increases along the first direction starting from an end of the friction element close to the constant force elastic component.

[0013] In some embodiments, the movable elastic component includes a first movable member, a second movable member and a third elastic member, the first movable member is disposed in the bracket and can move along the first direction, the second movable member is connected to the first movable member through the third elastic member and can move along the second direction, the friction element is located between the second movable member and the dual member, and the constant force elastic component is connected between the first movable member and the bracket along the first direction.

[0014] In some embodiments, the movable elastic component further includes a first rolling member and a second rolling member, the first rolling member is disposed between the second movable member and the friction element, and the second rolling member is disposed between the first movable member and the bracket.

[0015] An elevator comprises the braking force device described in any one of the above items.

[0016] The elevator described above adopts the above braking force device. During the braking process, the friction element moves upward relative to the bracket along the first direction. During the movement process, the friction element produces relative movement in the first direction and the second direction relative to the moving elastic component, exerts a force on the moving elastic component in the first direction and the second direction, and also rubs against the dual part. Since there is a 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 dual part. As the movement continues, the friction between the friction element and the dual part will balance with the elastic force of the constant force elastic component and reach the constant elastic force set by the constant force elastic component. Therefore, within the designed friction coefficient range, no matter how the friction coefficient of the dual part changes, the braking friction will be consistent or roughly 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 component and is not affected by the change of the friction coefficient, so as to meet the safety braking of a wide range of different friction coefficients and ensure the safety and reliability of braking under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the braking force device in the initial state described in some embodiments of the present application.

[0020] Figure 2 This is a schematic diagram of the structure of the braking force device when a set constant elastic force is achieved in some embodiments of the present application.

[0021] Figure 3 This is a schematic diagram of the structure of the braking force device in a stable state described in some embodiments of the present application.

[0022] Figure 4 This is a schematic diagram of the structure of the constant elastic component described in other embodiments of the present application.

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

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0025] In some embodiments, please refer to Figure 1The present application provides a braking force device 100, which includes: a dual member 20 and a braking mechanism 200. The dual member 20 extends along a first direction X, and the braking mechanism 200 is arranged on at least one side of the dual member 20 along a second direction Y. Among them, the braking mechanism 200 includes a bracket 10, a movable elastic component 40, a friction element 30 and a constant force elastic component 50. The movable 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 movable elastic component 40 and the dual member 20, and elastically conflicts with the movable elastic component 40 in the second direction Y. The constant force elastic component 50 is connected between the movable elastic component 40 and the bracket 10, and applies an elastic force along the first direction X to the movable elastic component 40, and the first direction X intersects with the second direction Y. When the friction element 30 moves relative to the bracket 10 along the first direction X, it will rub against the dual member 20 and apply forces to the movable elastic component 40 in the first direction X and the second direction Y respectively, and the elastic force of the constant force elastic component 50 on the movable elastic component 40 can reach a constant elastic force of the constant force elastic component 50.

[0026] In the braking force device 100 described above, during the braking process, the friction element 30 moves upward relative to the bracket 10 along the first direction X. During the movement process, the friction element 30 generates relative movement relative to the moving elastic component 40 in the first direction X and the second direction Y, respectively, exerts a force on the moving elastic component 40 in the first direction X and the second direction Y, and also frictionally abuts against the mating part 20. Since there is a force between the friction element 30 and the moving elastic component 40 in the second direction Y, a positive pressure is generated on the friction element 30, increasing the friction force between the friction element 30 and the mating part 20. As the movement continues, the friction force between the friction element 30 and the mating part 20 will be balanced with the elastic force of the constant force elastic component 50, and reach the constant elastic force set by the constant force elastic component 50. Therefore, within the designed friction coefficient range, no matter how the friction coefficient of the mating part 20 changes, the braking friction force will be consistent or approximately consistent with the set constant elastic force. In this way, the braking friction of the braking force device 100 of the present application is set by the constant force elastic component 50, which 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 braking under different working conditions. Among them, the wide range is relative to the design of the traditional braking force device 100, and most of the traditional braking force devices 100 only meet the design of the dual member 20 of different friction coefficients within a small range.

[0027] It should be noted that when the elevator is in emergency braking, the friction element 30 will move upward relative to the bracket 10 along the first direction X, and at this time, the friction element 30 applies forces in the first direction X and the second direction Y to the movable elastic component 40. On the contrary, the movable elastic component 40 will also generate positive pressure along the second direction Y on the friction element 30, so that it will frictionally abut against the mating member 20. At the same time, the movable elastic component 40 can move in the first direction X. Therefore, after the movable elastic component 40 is subjected to force, the constant elastic component will be compressed by the movable elastic component 40 in the first direction X, forming an elastic force opposite to the friction force.

[0028] As the relative movement continues, the elastic force reaches the constant elastic force of the constant elastic component, and is equal to the friction force according to the force balance relationship. Since the elastic force of the constant elastic component remains unchanged or changes slightly thereafter, the friction force does not change after reaching equilibrium and remains relatively constant. In this way, when designing the braking force device 100, the braking force can be kept relatively constant regardless of the change in the friction coefficient of the mating member 20. At this time, there is no relative displacement between the friction element 30 and the mobile elastic component 40.

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

[0030] It should also be noted that the movable elastic component 40 refers to a structure that can move in the first direction X; at the same time, it can undergo elastic deformation in the second direction Y, so that during emergency braking, the movable elastic component 40 generates positive pressure on the friction element 30 to form an effective friction force for safe braking.

[0031] Meanwhile, the constant force 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 compression deformation continues, the elastic force will remain unchanged or slightly change. There are many structural designs, as long as it can meet the output of constant elastic force, and the friction element 30 can abut against the stopper 60 within the range of outputting constant elastic force.

[0032] In addition, the dual part 20 can be understood as the guide rail structure in the elevator. Due to different processing methods, surface protection, working conditions, processing and manufacturing errors, or factors such as rust and oil, the friction coefficient on the dual part 20 can vary within a large range. Therefore, the traditional braking force device 100 cannot meet the design of the dual part 20 under different working conditions and cannot guarantee a constant braking force. For this reason, the introduction of the braking force device 100 of the present application can effectively meet the design of different friction coefficients and ensure a constant braking force.

[0033] For further information, please refer to Figure 1 The braking force device 100 further includes a stopper 60 disposed on the bracket 10, and the stopper 60 is located above the friction element 30 in the first direction X. Before 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. 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 mating member 20 is also a constant elastic force, and the braking force device 100 reaches the set force state. At this time, when the friction element 30 continues to rise, it will not produce relative displacement with the moving elastic component 40 in the first direction X. 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, achieving 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 mating member 20 remains relatively unchanged, achieving a relatively constant braking force.

[0034] It should be noted that the "relatively constant" in the present application should be understood as: through the constant force elastic component 50, it is ensured that after the braking force reaches the set constant force elastic force, when the friction element 30 continues to move, the spring force provided by the constant force elastic component 50 remains unchanged or has a slight change, and 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, no matter how the friction coefficient of the dual part 20 changes, the braking friction force is consistent with the set constant elastic force, or has a slight deviation. Because 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 the range, it will not affect the preset braking force, but because the constant force elastic component 50 will have a certain change in the resultant force, such as the internal error of the constant force elastic component 50, etc., it does not change with the change of the friction coefficient, and can be considered relatively constant.

[0035] In some embodiments, please refer to Figure 2, when the friction coefficient between the friction element 30 and the mating part 20 is configured as the minimum value among the preset coefficients, and the friction force between the friction element 30 and the mating part 20 reaches the preset constant elastic force, the distance between the friction element 30 and the stopper 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 positive pressure on the friction element 30, the smaller the friction coefficient, the greater the positive pressure. At this time, it is necessary to ensure that the elastic deformation of the third elastic member 43 is within the design range. In this way, the greater the relative displacement between the mobile elastic component 40 and the friction element 30, the greater the required stroke. To this end, the friction coefficient is set to the minimum value among the preset coefficients in this embodiment. Under the premise of this friction coefficient, the distance between the friction element 30 and the stopper 60 is greater than or equal to 0, so that it can be ensured that under different friction coefficients greater than the set minimum friction coefficient, the friction element 30 makes the braking force reach a constant elastic force before abutting against the stopper 60, thereby achieving a constant braking force.

[0036] In some embodiments, please refer to Figure 2 , when the friction coefficient between the friction element 30 and the mating part 20 is configured as the maximum value among the preset coefficients, and the friction force between the friction element 30 and the mating part 20 reaches the preset constant elastic force, the distance between the friction element 30 and the stopper 60 is recorded as T2, where T2>T1. Since the friction coefficient is the maximum, the relative displacement between the mobile elastic component 40 and the friction element 30 is the minimum, and the required stroke is the minimum. To this end, the friction coefficient is set to the maximum value among the preset coefficients in this embodiment. Under the premise of this friction coefficient, the distance T2 between the friction element 30 and the stopper 60 reaches the maximum value. It is required that within the stroke range of T2, the combined force change value of the compression constant force elastic component 50 is within the constant force change error range, so that it can be ensured that under different friction coefficients less than the set maximum friction coefficient, before the friction element 30 abuts against the stopper 60, the braking force and the set constant elastic force will not change much, thereby achieving a constant braking force.

[0037] Among them, the friction coefficient between the friction element 30 and the mating part 20 can have different options, for example: the preset coefficient is 0.3~1, that is, the preset coefficient can be but 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 component 50 includes a force guide 55 and a first elastic component 51 and a second elastic component 52 arranged on the bracket 10. The first elastic component 51 abuts against the mobile elastic component 40 along the first direction X. The second elastic component 52 extends along the second direction Y, and the force guide 55 is rotatably connected to the mobile elastic component 40 and abuts against the second elastic component 52. It can be seen that when the friction element 30 rises relatively, the first elastic component 51 is compressed along the first direction X; at the same time, the second elastic component 52 is compressed along the second direction Y, and the force is transmitted to the mobile elastic component 40 through the force guide 55. When the resultant force of the constant force elastic component 50 reaches the preset constant elastic force, the constant force elastic component 50 is continuously compressed, and the elastic force on the first elastic component 51 will increase, but the angle between the force guide 55 and the first direction X increases due to the rotation, so that the component force of the second elastic component 52 in the first direction X is reduced, so that the resultant force of the constant force elastic component 50 can remain unchanged or change slightly, so as to achieve relative constant force.

[0039] To facilitate force transmission, the force guiding member 55 may include a swing rod portion 551 and a push head 552 provided at one end of the swing rod portion 551 . One end of the swing rod portion 551 is rotatably connected to the movable elastic component 40 , 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 may be, but are not limited to, coil springs, gas springs, or compression rod springs.

[0041] For further information, please refer to Figure 1 The constant force elastic component 50 further includes a support member 53 and a limiting portion 54 disposed on the support member 53, wherein the support member 53 is disposed on the second elastic member 52. One end of the force guiding member 55 abuts against the support member 53 and contacts the limiting portion 54 in the first direction X. In this way, the force transmission between the force guiding member 55 and the second elastic member 52 is facilitated by the support member 53 and the limiting portion 54.

[0042] It should be noted that, before the force guiding member 55 abuts against the limiting portion 54, the force guiding member 55 moves on the supporting member 53 along the first direction X. Figure 4 In other embodiments, if there are two support members 53 , the two support members 53 are movably disposed on the bracket 10 along the second direction Y, and the second elastic member 52 is connected between the two support members 53 .

[0043] In some embodiments, please refer to Figure 1, the side of the friction element 30 facing the mobile elastic component 40 includes an inclined surface 32, and the distance between the inclined surface 32 and the mating part 20 gradually increases along the first direction X from the end of the friction element 30 close to the constant force elastic component 50. It can be seen that when the friction element 30 rises relative to the bracket 10, the inclined surface 32 will stretch the mobile elastic component 40 along the second direction Y; at the same time, it also moves along the first direction X. In this way, not only the constant force elastic component 50 can be compressed; but also positive pressure can be generated in the second direction Y, so that the friction element 30 forms a braking force on the mating part 20.

[0044] In some embodiments, please refer to Figure 1 The movable elastic component 40 includes a first movable member 41, a second movable member 42 and a third elastic member 43. The first movable member 41 is arranged in the bracket 10 and can move along the first direction X. The second movable member 42 is connected to the first movable 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 movable member 42 and the dual member 20, and the constant force elastic component 50 is connected between the first movable member 41 and the bracket 10 along the first direction X. It can be seen that during emergency braking, the second movable member 42 moves relative to the first movable member 41 in the second direction Y to generate positive pressure; the first movable member 41 moves in the first direction X, compressing the constant force elastic component 50, so that the friction force and the constant elastic force are balanced.

[0045] For further information, please refer to Figure 1 To facilitate the cooperation with the inclined surface 32 of the friction element 30, the second movable member 42 includes a cooperation surface 421 on one side of the friction element 30. The cooperation surface 421 is inclined, and one end of the cooperation surface 421 close to the constant force elastic component 50 is closer to the dual member 20 than the other end.

[0046] In addition, in order to make the movable elastic component 40 move stably, the bracket 10 may include a bottom 11, a top 13, and a side portion 12 connected between the bottom 11 and the top 13. The bottom 11, the side 12, and the top 13 enclose a mounting groove 15, and the notch of the mounting groove 15 is arranged toward the mating member 20, and the movable elastic component 40 is arranged in the mounting groove 15. At the same time, the bracket 10 may also include a support portion 14, which is arranged on the bottom 11 and the side 12 and extends along the first direction X, and the first movable member 41 can move along the first direction X on the support portion 14.

[0047] In some embodiments, please refer to Figure 1The movable elastic component 40 further includes a first rolling member 31 and a second rolling member 44. The first rolling member 31 is disposed between the second movable member 42 and the friction element 30, and the second rolling member 44 is disposed between the first movable member 41 and the bracket 10. Thus, the first movable member 41 and the second movable member 42 are stably moved respectively 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 component 50, reference may be made to the parameters during braking in Table 1. When the set constant elastic force is 1872 Kg, the compression variation of the first elastic member 51 is 0-21.2 mm, and the variation range of the resultant force is 1872 Kg-1880 Kg, with a maximum deviation of only 8 Kg. This theoretical deviation is very small and can be considered as a relatively constant braking force.

[0049] Table 1

[0050]

[0051] Among them, the spring 1 in Table 1 is the first elastic member 51, the spring 2 is the second elastic member 52, and the side 12 spring is the third elastic member 43, the guide rail is the dual member 20 of the present application; the rod length is the length of the force-guiding member 55. In addition, P+Q in the table is the deadweight and load of the elevator car. It can be seen from Table 1 that through the constant force elastic component 50, not only can the braking force be relatively constant, but also the deadweight and load of the car can be selected from 1900 Kg to 2650 Kg when the elevator is designed, which has a wide range of options and is convenient for elevator safety design.

[0052] In some embodiments, the present application provides an elevator, and the elevator includes any one of the above braking force devices 100.

[0053] The elevator described above adopts the above braking force device 100. During the braking process, the friction element 30 moves upward relative to the bracket 10 along the first direction X. During the movement process, the friction element 30 generates relative movement relative to the moving elastic component 40 in the first direction X and the second direction Y, respectively, exerts a force on the moving elastic component 40 in the first direction X and the second direction Y, and also frictionally abuts against the mating part 20. Since there is a force between the friction element 30 and the moving elastic component 40 in the second direction Y, a positive pressure is generated on the friction element 30, increasing the friction force between the friction element 30 and the mating part 20. As the movement continues, the friction force between the friction element 30 and the mating part 20 will balance with the elastic force of the constant force elastic component 50, and reach the constant elastic force set by the constant force elastic component 50. Therefore, within the designed friction coefficient range, no matter how the friction coefficient of the mating part 20 changes, the braking friction force will be consistent or roughly consistent with the set constant elastic force. In this way, the braking friction of the braking force device 100 of the present application is set by the constant force elastic component 50 and is not affected by changes in the friction coefficient, so as to meet safe braking with different friction coefficients in a wide range and ensure safe and reliable braking under different working conditions.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A braking force device, characterized in that: The braking force device comprises: The dual member (20) extends along a first direction (X); A braking mechanism (200) is arranged on at least one side of the dual member (20) along the second direction (Y), wherein the braking mechanism (200) comprises a bracket (10), a movable elastic component (40), a friction element (30) and a constant force elastic component (50), wherein the movable 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 movable elastic component (40) and the dual member (20), and elastically contacts the movable elastic component (40) in the second direction (Y), and the constant force elastic component (50) is connected between the movable elastic component (40) and the bracket (10), and applies an elastic force along the first direction (X) to the movable elastic component (40), and the first direction (X) intersects with the second direction (Y); When the friction element (30) moves relative to the bracket (10) along the first direction (X), it will frictionally abut against the dual member (20) and apply forces to the movable elastic component (40) in the first direction (X) and the second direction (Y), respectively, and the elastic force of the constant force elastic component (50) on the movable elastic component (40) can reach a constant elastic force of the constant force elastic component (50).

2. The braking force device according to claim 1, characterized in that: The braking force device also includes a stopper (60) arranged on the bracket (10), and the stopper (60) is located above the friction element (30) in the first direction (X). Before the friction element (30) abuts against the stopper (60), the elastic force of the constant force elastic component (50) on the movable elastic component (40) reaches a preset constant elastic force.

3. The braking force device according to claim 2, characterized in that: When the friction coefficient between the friction element (30) and the mating member (20) is configured to be the minimum value among the preset coefficients, and the friction force between the friction element (30) and the mating member (20) reaches the preset constant elastic force, the distance between the friction element (30) and the stop member (60) is recorded as T1, where T1≥0.

4. The braking force device according to claim 3, characterized in that: When the friction coefficient between the friction element (30) and the mating member (20) is configured as the maximum value among the preset coefficients, and the friction force between the friction element (30) and the mating member (20) reaches a preset constant elastic force, the distance between the friction element (30) and the stop member (60) is recorded as T2, wherein T2>T1.

5. The braking force device according to claim 1, characterized in that: The constant force elastic component (50) includes a force guiding member (55) and a first elastic member (51) and a second elastic member (52) arranged on the bracket (10), wherein the first elastic member (51) abuts against the movable elastic component (40) along the first direction (X), and the second elastic member (52) extends along the second direction (Y), and the force guiding member (55) is rotatably connected to the movable elastic component (40) and abuts against the second elastic member (52).

6. The braking force device according to claim 5, characterized in that: The constant force elastic component (50) also includes a support member (53) and a limiting portion (54) arranged on the support member (53), the support member (53) is arranged on the second elastic member (52), one end of the force guiding member (55) is against the support member (53) and contacts the limiting portion (54) in the first direction (X).

7. The braking force device according to any one of claims 1 to 6, characterized in that: A side surface of the friction element (30) facing the movable elastic component (40) includes an inclined surface (32), and the distance between the inclined surface (32) and the dual member (20) gradually increases along the first direction (X) starting from an end of the friction element (30) close to the constant force elastic component (50).

8. The braking force device according to any one of claims 1 to 6, characterized in that: The movable elastic component (40) comprises a first movable member (41), a second movable member (42) and a third elastic member (43); the first movable member (41) is arranged in the bracket (10) and can move along the first direction (X); the second movable member (42) is connected to the first movable 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 movable member (42) and the mating member (20); and the constant force elastic component (50) is connected between the first movable member (41) and the bracket (10) along the first direction (X).

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

10. An elevator, characterized in that: The elevator comprises the braking force device according to any one of claims 1-9.

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