Elevator safety gear

Abstract

The utility model discloses an elevator safety tongs, including the tong body, guide component, elastic component, fixed wedge and movable wedge, guide component elastic component installs respectively at two sides of the tong body, fixed wedge with elastic component is connected, movable wedge is obliquely slidably installed on guide component, and the passage for accommodating elevator guide rail is formed between movable wedge with fixed wedge, wherein, movable wedge one side distribution has a plurality of ceramic pieces to fixed wedge, and one end of each ceramic piece is embedded in movable wedge, and the other end protruding setting to fixed wedge. The utility model discloses through setting ceramic piece on movable wedge one side to fixed wedge, utilizes the characteristic that ceramic material is big in friction coefficient itself, compared with traditional metal material brake element, can significantly improve the friction when contacting with elevator guide rail, and effectively promotes the braking performance.

Description

Technical Field

[0001] This utility model relates to the technical field of elevator safety clamps, and more particularly to an elevator safety clamp. Background Technology

[0002] In the field of elevator safety, ensuring that elevators can stop in time under abnormal conditions such as overspeed to protect passenger safety is of paramount importance. Currently, many elevators are equipped with elevator safety clamps at the guide rails. The working principle is to use braking components to clamp the guide rails, and use the friction between the two to stop the elevator when it is descending at excessive speed, thereby playing a protective role.

[0003] However, existing elevator safety brakes have significant drawbacks. Firstly, their braking components are typically made of metal, which inherently has a low coefficient of friction when in contact with the guide rails, making it difficult to generate sufficient frictional force for rapid and effective braking. Secondly, during long-term elevator use, or when maintenance is inadequate, the guide rails inevitably become contaminated with oil. The presence of oil further reduces the coefficient of friction between the braking components and the guide rails, significantly diminishing the braking performance of the safety brake and preventing it from reliably performing its protective function in critical moments, thus posing a serious threat to elevator safety. Utility Model Content

[0004] In view of the aforementioned problems with existing elevator safety clamps, the aim is to provide an elevator safety clamp.

[0005] The specific technical solution is as follows: An elevator safety clamp includes a clamp body, a guide assembly, an elastic assembly, a fixed wedge, and a movable wedge. The guide assembly and the elastic assembly are respectively installed on both sides of the clamp body. The fixed wedge is connected to the elastic assembly. The movable wedge is tiltably and slidably installed on the guide assembly, and a channel for accommodating an elevator guide rail is formed between the movable wedge and the fixed wedge. The movable wedge has several ceramic parts distributed on the side facing the fixed wedge. One end of each ceramic part is embedded in the movable wedge, and the other end protrudes towards the fixed wedge.

[0006] As a further improvement and optimization of this solution, one side of the movable wedge has several accommodating spaces, and one end of several ceramic parts is embedded in several accommodating spaces.

[0007] As a further improvement and optimization of this solution, each of the aforementioned accommodating spaces is filled with adhesive.

[0008] As a further improvement and optimization of this solution, a friction surface is formed at the other end of each of the ceramic parts, and the friction surface has friction patterns.

[0009] As a further improvement and optimization of this solution, the ceramic component has a columnar structure.

[0010] As a further improvement and optimization of this solution, the movable wedge includes: a retainer and a wedge body. One side of the wedge body is slidably mounted on the guide assembly. One side of the retainer is connected to the other side of the wedge body, and a plurality of the ceramic parts are distributed on the other side.

[0011] As a further improvement and optimization of this solution, the wedge body is made of cast iron.

[0012] As a further improvement and optimization of this solution, an inclined guide rail is formed on one side of the guide component, and the movable wedge is slidably mounted on the inclined guide rail; One end of the movable wedge has a limiting member, and a limiting part is formed on the clamp body. When the movable wedge slides at an angle and the limiting member and the limiting part are engaged in a limiting cooperation, the movable wedge and the fixed wedge squeeze and clamp the elevator guide rail.

[0013] As a further improvement and optimization of this solution, the limiting component is an adjusting bolt, which is threaded onto the movable wedge, and the limiting part is located above the adjusting bolt.

[0014] As a further improvement and optimization of this solution, the elastic component includes several disc springs, one end of each disc spring being connected to the clamp body and the other end being connected to the fixed wedge.

[0015] The positive effects of the above technical solution compared with the existing technology are: (1) This utility model sets a ceramic part on the side of the movable wedge facing the fixed wedge. By taking advantage of the high friction coefficient of the ceramic material itself, it can significantly improve the friction force when in contact with the elevator guide rail compared with the traditional metal braking element, effectively improving the braking performance. At the same time, when the elevator has been used for many years or the guide rail is contaminated with oil due to improper maintenance, the ceramic part is less affected by the oil, which can reduce the negative impact of oil and other factors on the friction coefficient, improve the stability of the friction coefficient, and thus enhance the reliability and safety of the elevator safety clamp during emergency braking.

[0016] (2) The present invention designs the limiting component as an adjusting bolt and threadedly installs it on the movable wedge. By rotating the adjusting bolt, its height can be precisely controlled, thereby flexibly adjusting the sliding stroke and limiting position of the movable wedge, realizing the precise setting of the clamping force of the safety clamp, meeting the needs of different elevator quality and operating conditions, and improving the versatility and adaptability of the safety clamp. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an elevator safety clamp according to the present invention; Figure 2 This is a schematic diagram of the movable wedge block of an elevator safety clamp according to the present invention; Figure 3 This is a schematic diagram of the movable wedge block of an elevator safety clamp according to the present invention; Figure 4 This utility model relates to an elevator safety clamp. Figure 2 Cross-sectional view of the middle section (BB); Figure 5 This is a schematic diagram of the disc spring component of an elevator safety clamp according to the present invention; In the attached diagram: 1. Clamp body; 2. Guide assembly; 3. Movable wedge; 4. Fixed wedge; 5. Elastic assembly; 21. Tension spring; 22. Roller assembly; 31. Adjusting bolt; 32. Ceramic component; 33. Cage; 34. Wedge body; 35. Adhesive; 36. Retaining ring; 331. Accommodating space; 51. Disc spring; 52. Mounting post; 53. Filler plate. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Figure 1 This is a structural schematic diagram of an elevator safety clamp according to the present invention. Figure 2 This is a schematic diagram of the movable wedge block of an elevator safety clamp according to the present invention. Figure 3 This is a schematic diagram of the movable wedge block of an elevator safety clamp according to the present invention. Figure 4 This utility model relates to an elevator safety clamp. Figure 2 Cross-sectional view of BB in the middle. Figure 5 This is a schematic diagram of the disc spring component of an elevator safety clamp according to this utility model. Figure 1-5 The diagram illustrates a preferred embodiment of an elevator safety clamp, comprising a clamp body 1, a guide assembly 2, an elastic assembly 5, a fixed wedge 4, and a movable wedge 3. The guide assembly 2 and the elastic assembly 5 are respectively mounted on both sides of the clamp body 1. The fixed wedge 4 is connected to the elastic assembly 5. The movable wedge 3 is longitudinally inclined and slidably mounted on the guide assembly 2, and a channel for accommodating the elevator guide rail is formed between the movable wedge 3 and the fixed wedge 4. Several ceramic parts 32 are distributed on the side of the movable wedge facing the fixed wedge 4, with one end of each ceramic part 32 embedded in the movable wedge and the other end protruding towards the fixed wedge 4. Furthermore, when the elevator travels downwards at excessive speed, the movable wedge will be driven by other elevator mechanisms to move obliquely along the guide assembly 2 and approach the elevator guide rail. While compressing the elevator guide rail, it causes the fixed wedge 4 to slide and compress the elastic assembly 5, thereby causing the fixed wedge 4, under the elastic force generated by the elastic assembly 5, to clamp the elevator guide rail together with the movable wedge.

[0022] In this embodiment, a ceramic component 32 is provided on the side of the movable wedge facing the fixed wedge 4. Utilizing the high coefficient of friction inherent in ceramic materials, compared to traditional metal braking components, it can significantly increase the frictional force when in contact with the elevator guide rail, effectively improving braking performance. Furthermore, even when the elevator has been used for many years or the guide rail is contaminated with oil due to improper maintenance, the ceramic component 32 is less affected by oil contamination, reducing the negative impact of oil contamination and other factors on the coefficient of friction, improving the stability of the coefficient of friction, and thus enhancing the reliability and safety of the elevator safety brake during emergency braking.

[0023] Furthermore, as a preferred embodiment, one side of the movable wedge has a plurality of receiving spaces 331, and one end of a plurality of ceramic parts 32 is embedded in the plurality of receiving spaces 331.

[0024] Furthermore, as a preferred embodiment, each accommodating space 331 is filled with adhesive 35.

[0025] Even better, a retaining ring 36 is provided in the ceramic part 32 and the receiving space 331.

[0026] In this embodiment, a receiving space 331 is provided on the movable wedge for embedding the ceramic component 32, which is then fixed with adhesive 35. This ensures a firm connection between the ceramic component 32 and the movable wedge, preventing the ceramic component 32 from loosening or falling off during braking, thus guaranteeing the stability and reliability of the braking process. The retaining ring 36 further enhances the fixing effect of the ceramic component 32 within the receiving space 331, preventing displacement of the ceramic component 32 due to aging of the adhesive 35 or impact from external forces, thereby improving the overall structural strength and service life of the safety clamp. Simultaneously, this structural design facilitates the installation and replacement of the ceramic component 32, reducing maintenance costs.

[0027] Furthermore, as a preferred embodiment, each ceramic component 32 has a friction surface formed at its other end, and the friction surface has friction patterns.

[0028] Furthermore, as a preferred embodiment, the ceramic part 32 has a columnar structure.

[0029] Furthermore, as a preferred embodiment, the movable wedge 3 includes: a retainer 33 and a wedge body 34. One side of the wedge body 34 is slidably mounted on the guide assembly 2. One side of the retainer 33 is connected to the other side of the wedge body 34, and a plurality of ceramic parts 32 are distributed on the other side.

[0030] Even better, the cage 33 and the wedge-shaped body 34 can be connected by several screws.

[0031] Furthermore, as a preferred embodiment, the wedge body 34 is made of cast iron.

[0032] In this application, the other end of the ceramic component 32 is provided with a friction surface with friction texture, which can increase the friction between the ceramic component 32 and the elevator guide rail, further improving the braking effect. The columnar structure of the ceramic component 32 is easy to process and install, and can more evenly distribute pressure when under force, reducing stress concentration and improving the strength and durability of the ceramic component 32 itself. The wedge body 34 is made of cast iron material, which has a certain strength and toughness, can meet the force requirements of the fixed wedge 4 during the braking process, and at the same time, the cost is relatively low, which helps to reduce the manufacturing cost of the safety clamp.

[0033] Furthermore, as a preferred embodiment, an inclined guide rail is formed on one side of the guide assembly 2, and the movable wedge 3 is slidably mounted on the inclined guide rail; one end of the movable wedge 3 has a limiting member, and a limiting part is formed on the clamp body 1. When the movable wedge 3 slides at an incline and the limiting member and the limiting part are engaged in a limiting cooperation, the movable wedge 3 and the fixed wedge 4 squeeze and clamp the elevator guide rail.

[0034] Furthermore, as a preferred embodiment, the limiting member is an adjusting bolt 31, which is threaded onto the movable wedge 3, and the limiting part is located above the adjusting bolt.

[0035] In this embodiment, the guide component 2 is equipped with an inclined guide rail, allowing the movable wedge 3 to slide along the inclined direction. During braking, the movable wedge 3 and the fixed wedge 4 gradually engage and clamp the guide rail, achieving smooth braking. A limiting component and a limiting part are provided to limit the movable wedge 3 when it slides to a certain position, ensuring that the movable wedge 3 and the fixed wedge 4 generate sufficient clamping force on the guide rail, guaranteeing the braking effect. The limiting component is designed as an adjusting bolt 31, threaded onto the movable wedge 3. By rotating the adjusting bolt 31, its height can be precisely controlled, thereby flexibly adjusting the sliding stroke and limiting position of the movable wedge 3. This allows for precise setting of the safety clamp clamping force, meeting the needs of different elevator qualities and operating conditions, and improving the versatility and adaptability of the safety clamp.

[0036] Furthermore, as a preferred embodiment, the elastic component 5 includes a plurality of disc springs, one end of each disc spring being connected to the clamp body 1 and the other end being connected to the fixed wedge block 4.

[0037] Based on the above, this utility model also has the following embodiments: Furthermore, as a preferred embodiment, each disc spring includes several disc springs 51 and mounting posts 52. One end of the mounting post 52 is mounted on the clamp body 1. The fixing wedge 4 can be slidably mounted on the clamp body 1 along the axial direction of the mounting post 52. Several stacked springs are coaxially sleeved on the outside of the mounting post 52 and abut against the fixing wedge 4 and the clamp body 1.

[0038] Furthermore, in a preferred embodiment, each disc spring also includes a plurality of slit pieces 53, which are sleeved on the outside of the mounting post 52 and abut against the plurality of disc springs 51 and the clamp body 1.

[0039] In this embodiment, a disc spring 51 is used as the elastic component 5. The disc spring 51 has variable stiffness characteristics, which can generate a large elastic force within a small deformation range, providing stable and sufficient elastic force for the fixed wedge 4. This allows the movable wedge 3 and the fixed wedge 4 to tightly clamp the guide rail during braking, improving braking reliability. The mounting post 52 guides the compression and extension direction of the disc spring 51, preventing it from shifting during the force application process and ensuring the working stability of the elastic component 5. The design of the slit plate 53 allows for precise adjustment of the initial compression of the disc spring 51. By increasing or decreasing the number of slit plates 53, the preload of the disc spring 51 can be flexibly controlled, thereby achieving precise adjustment of the safety clamp clamping force to meet the braking requirements of different elevators and further improving the performance and applicability of the safety clamp.

[0040] Furthermore, in a preferred embodiment, the guide assembly 2 further includes a roller assembly 22 and a tension spring 21. The roller assembly 22 is disposed between the movable wedge 3 and the inclined guide rail, and the tension spring 21 is connected between the guide assembly 2 and the roller assembly 22. By placing the roller assembly 22 between the movable wedge 3 and the inclined guide rail, sliding friction is converted into rolling friction, greatly reducing the frictional force of the movable wedge 3 during sliding, making the movement of the movable wedge 3 more flexible and smooth, and improving the response speed and braking sensitivity of the safety clamp.

[0041] This embodiment also discloses a method for adjusting the clamping force of an elevator safety clamp, the adjustment steps of which are as follows: S1: When assembling the clamp base, add an appropriate amount of filler plate 53 between the disc spring 51 and the clamp body 1; S2: After assembly, check the rotation of disc spring 51. If disc spring 51 cannot rotate due to compression, remove part of the filler plate 53 until disc spring 51 can just rotate, ensuring that disc spring 51 does not have the initial pre-compression after the clamp seat is assembled. S3: Gently clamp the movable wedge and the fixed wedge 4 onto the elevator guide rail, and then apply a certain preload to the guide rail to ensure that the wedge has fully clamped the guide rail. S4: The compression of the disc spring 51 is controlled by adjusting the height of bolt 31, thereby adjusting the clamping force. At this time, the height BH value of bolt 31 is adjusted as follows: Figure 1 As shown, dimension A is made to satisfy the formula: A = S / tanθ, where θ is the tilt angle of the guide surface (a tilted guide rail is formed on one side of the guide component 2, and this angle is the tilt angle of the tilted guide rail), and S is the compression amount of the corresponding disc spring 51. The relevant parameters can be accurately measured and calculated by measuring tools to ensure that dimension A meets the requirements.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An elevator safety clamp, characterized in that, The device includes a clamp body, a guide assembly, an elastic assembly, a fixed wedge, and a movable wedge. The guide assembly and the elastic assembly are respectively installed on both sides of the clamp body. The fixed wedge is connected to the elastic assembly. The movable wedge is tiltably and slidably installed on the guide assembly, and a channel for accommodating elevator guide rails is formed between the movable wedge and the fixed wedge. The movable wedge has several ceramic parts distributed on the side facing the fixed wedge. One end of each ceramic part is embedded in the movable wedge, and the other end protrudes towards the fixed wedge.

2. The elevator safety clamp according to claim 1, characterized in that, The movable wedge has several accommodating spaces on one side, and one end of several ceramic parts is embedded in several accommodating spaces.

3. The elevator safety clamp according to claim 2, characterized in that, Each of the aforementioned accommodating spaces is filled with glue.

4. The elevator safety clamp according to claim 1, characterized in that, Each of the ceramic components has a friction surface formed at its other end, and the friction surface has friction patterns.

5. The elevator safety clamp according to claim 1, characterized in that, The ceramic component has a columnar structure.

6. The elevator safety clamp according to claim 1, characterized in that, The movable wedge includes a retainer and a wedge body. One side of the wedge body is slidably mounted on the guide assembly. One side of the retainer is connected to the other side of the wedge body, and a plurality of the ceramic parts are distributed on the other side.

7. The elevator safety clamp according to claim 6, characterized in that, The wedge body is made of cast iron.

8. The elevator safety clamp according to claim 1, characterized in that, An inclined guide rail is formed on one side of the guide assembly, and the movable wedge is slidably mounted on the inclined guide rail; One end of the movable wedge has a limiting member, and a limiting part is formed on the clamp body. When the movable wedge slides at an angle and the limiting member and the limiting part are engaged in a limiting cooperation, the movable wedge and the fixed wedge squeeze and clamp the elevator guide rail.

9. The elevator safety clamp according to claim 8, characterized in that, The limiting component is an adjusting bolt, which is threaded onto the movable wedge, and the limiting part is located above the adjusting bolt.

10. The elevator safety clamp according to claim 1, characterized in that, The elastic component includes several disc springs, one end of each disc spring being connected to the clamp body and the other end being connected to the fixed wedge.

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