A grinding device for elevator traction sheaves

Abstract

This invention relates to a grinding device for elevator traction sheaves, belonging to the field of traction sheave processing technology. It includes a worktable body, a clamping component, and a grinding assembly. The clamping component is mounted on the worktable body. The grinding assembly includes a rotating motor mounted on the worktable body. A support tube is installed at the output end of the rotating motor. Multiple branched tubes are installed on the surface of the support tube. A grinding brush is installed at one end of each branched tube. The traction sheave is ground by the circular grinding brush. The radial centrifugal force generated during grinding cleans debris. Combined with a blower, this improves the debris removal effect, prevents clumping at the brush bristle roots, and increases the effective grinding area. Simultaneously, an electrostatic adsorption plate is installed to adsorb debris, further enhancing the removal of debris from the brush bristles and preventing debris from flying and affecting the air and environmental hygiene of the work area.

Description

Technical Field

[0001] This invention relates to the field of traction sheave processing technology, and in particular to a grinding device for elevator traction sheaves. Background Technology

[0002] In the machining and maintenance of elevator traction sheaves, grinding the bottom of the groove and the rim is a key process to ensure its surface precision and the service life of the wire rope. Moreover, the surface condition of the traction sheave is crucial to the safety and stability of elevator operation. Due to long-term use, the surface of the traction sheave may experience wear, corrosion, or foreign matter accumulation. If these problems are not addressed in time, they may lead to slippage of the traction rope, increased noise, or even safety accidents. Therefore, regular grinding of the traction sheave has become one of the important aspects of elevator maintenance.

[0003] Prior art document 1 discloses an elevator wheel surface finishing device and process with authorization announcement number "CN114770254 B". The device uses a hydraulic drive to drive a linkage locking mechanism, which rotates the screw sleeve to engage with the screw hole of the traction wheel to fix the traction wheel. Then, the grinding part is brought close to the traction wheel, and the traction wheel is ground by rotating on a rotary table. Finally, another quick-locking device is installed on the traction wheel for grinding to improve processing efficiency.

[0004] In the above-mentioned actual process, the metal shavings generated often remain on the surface of the traction wheel and at the base of the bristles, forming clumps. These residues not only affect the polishing effect but may also damage the surface of the traction wheel, reduce polishing efficiency, and flying shavings are a common problem in traditional polishing methods. Especially when operating in an open environment, the flying shavings will have a negative impact on the air quality of the work area, threaten the health of operators, and increase cleaning costs. Summary of the Invention

[0005] This invention addresses the technical problems existing in the prior art by providing a grinding device for elevator traction sheaves. It employs a circular grinding brush to grind the traction sheave, and the radial centrifugal force generated during the grinding process effectively throws out most of the debris, preventing it from accumulating at the base of the brush bristles. This maintains an effective grinding area, improving grinding efficiency and quality. A blower is also included to further clean the debris during grinding. This combination not only removes surface debris more thoroughly but also prevents it from re-adhering to the traction sheave, ensuring a smooth, residue-free surface after grinding. Finally, an electrostatic adsorption plate attracts and holds fine metal debris, significantly improving the cleaning efficiency of the brush bristles.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A grinding device for elevator traction sheaves includes a workbench body, a clamping member, and a grinding assembly, wherein the clamping member is installed on the workbench body; the grinding assembly includes a rotating motor installed on the workbench body; a support tube is installed at the output end of the rotating motor; a plurality of branched tubes are installed on the surface of the support tube; and a grinding brush is installed on one end of the plurality of branched tubes.

[0007] The bristles on the polishing brush are tapered, and the diameter of the polishing brush base matches the opening of the traction wheel groove.

[0008] An air supply pipe is rotatably connected inside the support tube, and a blower is installed on the air supply pipe. The polishing brush has multiple dividing grooves and multiple air holes that communicate with the corresponding dividing grooves.

[0009] An electrostatic adsorption plate is installed on the main body of the workbench, and a collection box is installed on the main body of the workbench, with the collection box located below the electrostatic adsorption plate.

[0010] The polishing brush has multiple flexible bristles installed at its bristle end, and the multiple flexible bristles are umbrella-shaped.

[0011] The bristles of the polishing brush are spiral-shaped.

[0012] An air supply block is installed inside the polishing brush; multiple air pressure grooves are formed inside the air supply block; sliding rods are slidably connected to each of the multiple air pressure grooves, and the multiple sliding rods are slidably connected to the corresponding air pressure grooves through air plugs; a connecting groove is formed inside the air supply block, which connects the multiple air pressure grooves to each other and provides air pressure to the multiple air pressure grooves; a push spring is installed inside the connecting groove; a squeezing plate is installed at one end of the push spring, and the squeezing plate is slidably and sealingly connected to the connecting groove, and the movement of the squeezing plate regulates the air pressure in the connecting groove.

[0013] The air supply block has a vent hole on one side of the extrusion plate. The vent hole is not limited by the air pressure of the extrusion plate near the push spring when the extrusion plate slides. An air replenishment pump is installed on the extrusion plate, and the blowing end of the air replenishment pump is located in the connecting groove.

[0014] The sliding rod has an installation groove; an installation block is slidably disposed in the installation groove, and the installation block is connected to the bristles of the polishing brush; a first magnet is installed at one end of the installation block; a second magnet is installed in the installation groove, and the second magnet, together with the first magnet, fixes the installation block; multiple installation blocks are provided on the polishing brush, and the bristles are connected to the polishing brush through the multiple installation blocks, so that the worn bristles in the corresponding area can be replaced through the installation blocks.

[0015] An application of the chamfering machine described in any of the above claims in the processing of cast iron pipes.

[0016] The beneficial effects of this invention are as follows: the traction wheel is polished by a circular polishing brush, and the radial centrifugal force generated during polishing can clean up the debris. Combined with a blower, the debris can be cleaned up, improving the debris cleaning effect, preventing the bristles from clumping together, and increasing the effective polishing area. At the same time, the electrostatic adsorption plate is installed to adsorb the debris, improving the degree of debris cleaning from the bristles, and also preventing the debris from flying and affecting the air and environmental hygiene of the work area. Attached Figure Description

[0017] Figure 1 A schematic diagram of a grinding device for elevator traction sheaves;

[0018] Figure 2 A schematic diagram of the main body of a grinding device for elevator traction sheaves;

[0019] Figure 3 A grinding device for elevator traction sheaves Figure 1 Enlarged view of point A in the middle;

[0020] Figure 4 A schematic diagram of the rotating motor structure of a grinding device for elevator traction sheaves, embodiment 1;

[0021] Figure 5 A schematic diagram of the flexible bristle structure of a grinding device for elevator traction sheaves, embodiment 2;

[0022] Figure 6 A schematic diagram of the grinding brush structure of a grinding device for elevator traction sheaves, embodiment 3;

[0023] Figure 7 A partial structural diagram of the grinding brush in Embodiment 3 of a grinding device for elevator traction sheaves;

[0024] Figure 8 A schematic diagram of the grinding brush structure of a grinding device for elevator traction sheaves, embodiment 4;

[0025] Figure 9 A schematic diagram of the air supply block structure of a grinding device for elevator traction sheaves, embodiment 4;

[0026] Figure 10 A cross-sectional view of the air supply block of a grinding device for elevator traction sheaves, embodiment 4;

[0027] Figure 11 A grinding device for elevator traction sheaves Figure 10 Enlarged view of section B in the middle.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Workbench body; 11. Clamping component; 2. Grinding assembly; 21. Rotary motor; 22. Support tube; 23. Branch tube; 24. Grinding brush; 25. Air supply tube; 26. Blower; 28. Air hole; 3. Electrostatic adsorption plate; 4. Flexible bristles; 50. Air supply block; 51. Air pressure groove; 52. Sliding rod; 53. Connecting groove; 54. Push spring; 55. Extrusion plate; 60. Mounting groove; 61. Mounting block; 62. First magnet; 63. Second magnet. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0033] Example 1

[0034] Please see Figures 1-4This invention provides a grinding device for elevator traction sheaves, comprising a workbench body 1, a clamping member 11, and a grinding assembly 2. The clamping member 11 is mounted on the workbench body 1. The grinding assembly 2 includes a rotating motor 21 mounted on the workbench body 1. A support tube 22 is mounted on the output end of the rotating motor 21. A plurality of branched tubes 23 are mounted on the surface of the support tube 22. A grinding brush 24 is mounted on one end of each of the plurality of branched tubes 23.

[0035] The bristles on the polishing brush 24 are tapered, and the diameter of the base of the polishing brush 24 matches the opening of the traction wheel groove.

[0036] It should be noted that the conical design of the polishing brush 24 is achieved by dividing the bristles of the polishing brush 24 into multiple layers, with each layer of bristles having a conical design. The conical bristles are used to enter the groove of the elevator traction sheave, thereby improving the polishing effect on the groove of the elevator traction sheave. At the same time, it can also avoid excessive local force and reduce the damage to the elevator traction sheave caused by excessive local force during polishing.

[0037] An air supply pipe 25 is rotatably connected inside the support pipe 22. A blower 26 is installed on the air supply pipe 25. The polishing brush 24 has multiple dividing grooves and multiple air holes 28 that communicate with the corresponding dividing grooves.

[0038] It should be noted that the blowing angle can also be controlled by the control components, so that only the air hole 28 on one side of the electrostatic adsorption plate 3 can be properly ventilated. In this way, the debris blown out through the air hole 28 can be adsorbed and collected by the electrostatic adsorption plate 3, preventing the debris from floating around.

[0039] An electrostatic adsorption plate 3 is installed on the main body 1 of the workbench, and a collection box is installed on the main body 1 of the workbench, with the collection box located below the electrostatic adsorption plate 3.

[0040] It should be noted that when grinding the elevator traction sheave, the electrostatic adsorption plate 3 is in working condition. That is, the static electricity generated by the electrostatic adsorption plate 3 can adsorb the debris produced during grinding. After grinding one elevator traction sheave, or when there is a lot of adsorbed debris, the static electricity on the electrostatic adsorption plate 3 can be turned off, causing the debris adsorbed by the electrostatic adsorption plate 3 to fall into the collection box, thereby completing the cleaning of the debris. When the static electricity on the electrostatic adsorption plate 3 is turned off, the blower 26 needs to be turned off to avoid continuous blowing, which would cause the wind to blow the fallen debris, causing some debris to fly and affecting the air quality in the processing area.

[0041] It should be noted that the blower 26 is installed on the electrostatic adsorption plate 3. The air supply pipe 25 can be positioned by the electrostatic adsorption plate 3 in conjunction with the blower 26. One end of the air supply pipe 25 is rotatably connected to the support pipe 22, so that while the elevator traction sheave is being polished, air is blown into the air supply pipe 25 by the blower 26, and then flows from the air supply pipe 25 into the support pipe 22 and the branch pipe 23, then into the dividing groove, and finally discharged through the air blowing hole 28. The discharged air can blow away the debris on the polishing brush 24, thereby achieving the purpose of cleaning some of the debris.

[0042] Specific implementation:

[0043] When the traction sheave needs to be polished, the traction sheave is first fixed by the clamping member 11. After being fixed, the traction sheave is rotated by the clamping member 11. At the same time as the traction sheave rotates, the rotation motor 21 is controlled to rotate by the control switch. The rotation of the rotation motor 21 will drive the polishing brush 24 to polish the rotating traction sheave.

[0044] The 24 circular grinding brushes with traction wheels grind the brushes, and the radial centrifugal force generated during grinding can remove debris. Combined with a blower, the debris can be further removed, improving the cleaning effect, preventing clumping at the base of the bristles, and increasing the effective grinding area. At the same time, the electrostatic adsorption plate 3 is installed to adsorb the debris, improving the degree of debris removal from the bristles, and also preventing debris from flying around and affecting the air and environmental hygiene of the work area.

[0045] Example 2

[0046] Because traditional rigid brushes are limited by their diameter and cannot reach the bottom of narrow grooves, resulting in oxide layer residue and accelerated wear of the wire rope, improvements are being made.

[0047] Please see Figure 5 This invention provides a grinding device for elevator traction sheaves, wherein the brush bristles 24 are equipped with flexible bristles 4 at their ends, and the flexible bristles 4 are umbrella-shaped.

[0048] It should be noted that the flexible bristles 4 are made of ultra-fine copper-plated steel wire.

[0049] The traction wheel is polished by the elastic deformation of ultra-fine copper-plated steel wire. In the initial state, that is, in the free state, the flexible bristles 4 are arranged radially at 15°. When the brush is pressed into the wheel groove, the bristles are squeezed outward by the side wall and spread into an umbrella-shaped structure with a diameter of Φ10mm. Combined with the axial high-frequency oscillation, the dynamic impact force generated by the bending and rebound of the bristles and the spiral sweeping trajectory are used to cover the dead corners at the bottom of the groove, while the debris is discharged through the centrifugal effect.

[0050] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0051] By expanding the flexible bristles 4 outward into an umbrella-like structure, the contact area at the bottom of the groove is increased by 1.8 times, the coverage rate is increased from 75% to 98%, the roughness Ra is reduced from 3.2μm to 0.8μm, the grinding time per cycle is shortened by about 70% (45 minutes → 12 minutes), the service life of the steel wire rope is extended by about 65% (180,000 cycles → 300,000 cycles), and it is compatible with grooves of 4-12mm width and narrowness, solving the core pain points of traditional rigid brushes that cannot reach the bottom of the groove and have insufficient pressure.

[0052] Example 3

[0053] Because the solution relies on the passive chip removal due to the rotational inertia of the brush, the centrifugal force is insufficient to overcome the adhesion between the chips and the bristles during low-speed or intermittent processing (such as when the speed is <1000 rpm), resulting in chip retention. In addition, the linear contact mode between the straight bristles and the cord groove makes it easy for chips to migrate along the bristle axis to the root, forming "bristle root agglomerates". This not only reduces the effective grinding area, but also accelerates bristle breakage due to local stress concentration. Therefore, improvements are needed.

[0054] Please see Figure 6 and Figure 7 This invention provides a grinding device for elevator traction sheaves, wherein the bristles of the grinding brush 24 are spiral-shaped.

[0055] It should be noted that in this application, the rotating motor 21 is designed to be movable. After the elevator traction sheave is installed on the clamping member 11, the movement of the rotating motor 21 can drive the polishing brush 24 to make close contact with the elevator traction sheave, which facilitates subsequent polishing work. At the same time, the electrostatic adsorption plate 3 and the rotating motor 21 are on the same movable member, so that when the rotating motor 21 moves, it can drive the electrostatic adsorption plate 3 to move synchronously, so as to avoid the distance between the two changing and affecting the air supply pipe 26.

[0056] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0057] Dynamic self-cleaning function is achieved through geometric reconstruction. When the spiral bristles rotate (≥2000rpm), they generate radial centrifugal force and axial vortex effect, which can achieve the following effects:

[0058] Improved debris removal rate: The spiral gap forms a continuous debris removal channel, and debris is thrown away along the spiral tangent by centrifugal force. Compared with straight bristles, the amount of debris accumulation is reduced by 70%.

[0059] Contact mechanics optimization: The spiral structure upgrades the contact between the bristles and the cord groove from line contact to surface contact, resulting in more uniform pressure distribution, a 50% reduction in load on a single bristle, and a 30% increase in lifespan.

[0060] Improved processing quality: real-time debris removal avoids "secondary crushing", and the surface roughness (Ra) of the rope groove is optimized from 3.2μm to below 1.0μm, with no scratch defects.

[0061] It should be noted that after the bristles of the polishing brush 24 are worn, the bristles can also be used to perform gradient polishing on the elevator traction wheel. By adjusting the height of the elevator traction wheel, the position of the elevator traction wheel to be polished can be moved to a place with less wear or more wear, so as to achieve gradient polishing of the elevator traction wheel. The degree of wear of the bristles of the polishing brush 24 can be judged by manual inspection or by image comparison.

[0062] Example 4

[0063] Further improvements were made to enhance the uniformity of the grinding on the 24 pairs of elevator traction wheels using the grinding brush;

[0064] Please see Figures 8 to 11 This invention provides a grinding device for elevator traction sheaves. An air supply block 50 is installed inside the grinding brush 24. Multiple air pressure grooves 51 are formed inside the air supply block 50. Sliding rods 52 are slidably connected to each of the multiple air pressure grooves 51, and the sliding rods 52 are slidably connected to their respective air pressure grooves 51 via air plugs. A connecting groove 53 is formed inside the air supply block 50, connecting the multiple air pressure grooves 51 to each other and providing air pressure to the multiple air pressure grooves 51. A push spring 54 is installed inside the connecting groove 53. A pressing plate 55 is installed at one end of the push spring 54, and the pressing plate 55 is slidably and sealed to the connecting groove 53. The movement of the pressing plate 55 regulates the air pressure within the connecting groove 53.

[0065] It should be noted that in the initial state, the sliding rod 52 is in an extended state under the push of the gas in the connecting groove 53 and the air pressure groove 51, and a limit rod is installed on the sliding rod 52 to limit the length of movement of the sliding rod 52 and prevent the sliding rod 52 from moving out of the air pressure groove 51. After that, the sliding rod 52 is moved by the grinding brush 24, and can be contracted according to the concavity and convexity of the elevator traction sheave.

[0066] The air supply block 50 has a vent hole on one side of the extrusion plate 55. The vent hole is not limited by the air pressure of the extrusion plate 55 near the push spring 54 when the extrusion plate 55 slides. An air replenishment pump is installed on the extrusion plate 55, and the blowing end of the air replenishment pump is located in the connecting groove 53.

[0067] It should be noted that the air pump on the extrusion plate 55 can periodically replenish gas into the connecting groove 53 to avoid insufficient air pressure in the connecting groove 53 due to poor airtightness, which would affect the pushing of the sliding rod 52.

[0068] The sliding rod 52 has an installation groove 60; an installation block 61 is slidably disposed in the installation groove 60, and the installation block 61 is connected to the bristles of the polishing brush 24; a first magnet 62 is installed at one end of the installation block 61; a second magnet 63 is installed in the installation groove 60, and the second magnet 63 cooperates with the first magnet 62 to fix the installation block 61.

[0069] Specifically, after the elevator traction sheave is installed on the clamping member 11, the polishing brush 24 is moved. The movement of the polishing brush 24 will cause the polishing brush 24 to move closer to the elevator traction sheave, which in turn will drive the sliding rod 52 and the mounting block 61 inside the sliding rod 52 to move closer to the elevator traction sheave. Finally, the bristles on the mounting block 61 can come into contact with the elevator traction sheave. At the same time, the air pressure in the connecting groove 53 and the air pressure groove 51 pushes the sliding rod 52, so that the bristles at the corresponding position of the elevator traction sheave are in close contact with the elevator traction sheave, thereby improving the uniformity of polishing the elevator traction sheave.

[0070] After the air pressure in the connecting groove 53 and the air pressure groove 51 pushes the sliding rod 52, the gas-accommodating space in the air pressure groove 51 increases, which in turn reduces the air pressure in the connecting groove 53 and the air pressure groove 51. At this time, the pushing spring 54 pushes the squeezing plate 55, which squeezes the gas inside the connecting groove 53, thereby stabilizing the air pressure area in the connecting groove 53 and the air pressure groove 51.

[0071] The polishing brush 24 is provided with multiple mounting blocks 61, and the bristles are connected to the polishing brush 24 through the multiple mounting blocks 61. The worn bristles in the corresponding area can be replaced through the mounting blocks 61.

[0072] It should be noted that when some areas of the brush bristles are damaged or worn out, the bristles on the mounting block 61 can be pulled directly to disconnect the first magnet 62 and the second magnet 63 on the mounting block 61. Then, a new mounting block 61 can be taken out and inserted into the mounting slot 60 to connect the first magnet 62 and the second magnet 63 on the mounting block 61, thus completing the replacement of the damaged brush.

[0073] An application of the chamfering machine described in any of the above claims in the processing of cast iron pipes.

[0074] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0075] The elevator traction sheave is polished by bristles on multiple independently distributed mounting blocks 61. When facing the irregular polishing surface of the elevator traction sheave, the bristles can be pushed to different positions by the air pressure in the connecting groove 53 and the air pressure groove 51, which improves the adhesion between the bristles and the elevator traction sheave. At the same time, the adhesion pressure of the bristles at different positions is the same under the same air pressure, which significantly improves the polishing uniformity. In addition, the independently distributed bristles are connected by the first magnet 62 and the second magnet 63, which makes it easy to replace some bristles and reduce polishing costs.

[0076] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0077] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A grinding device for elevator traction sheaves, characterized in that, It includes a worktable body (1), a clamping component (11), and a grinding assembly (2), wherein, The clamping member (11) is installed on the workbench body (1); The grinding assembly (2) includes a rotary motor (21) mounted on the worktable body (1). The output end of the rotating motor (21) is equipped with a support tube (22); The surface of the support tube (22) is equipped with multiple branch tubes (23); A polishing brush (24) is installed on one end of each of the multiple branched tubes (23); The bristles on the polishing brush (24) are tapered, and the diameter of the base of the polishing brush (24) matches the opening of the traction wheel groove; An air supply pipe (25) is rotatably connected inside the support pipe (22). A blower (26) is installed on the air supply pipe (25). A plurality of dividing grooves are opened on the polishing brush (24), and a plurality of air blowing holes (28) are opened on the polishing brush and communicate with the corresponding dividing grooves. An electrostatic adsorption plate (3) is installed on the main body (1) of the workbench, and a collection box is installed on the main body (1) of the workbench, the collection box being located below the electrostatic adsorption plate (3); The polishing brush (24) has multiple flexible bristles (4) installed at the bristle end, and the multiple flexible bristles (4) are umbrella-shaped or spiral-shaped. When the flexible bristles are umbrella-shaped, the traction wheel is polished by the elastic deformation of the ultra-fine copper-plated steel wire. In the initial state, that is, in the free state, the flexible bristles 4 are arranged radially at 15°. When the brush is pressed into the wheel groove, the bristles are squeezed outward by the side wall and spread into an umbrella-shaped structure with a diameter of Φ10mm. Combined with the axial high-frequency oscillation, the dynamic impact force generated by the bending and rebound of the bristles and the spiral sweeping trajectory are used to cover the dead corners of the groove bottom. At the same time, the debris is discharged through the centrifugal effect. When the flexible bristles are spiral-shaped, the spiral bristles generate radial centrifugal force and axial vortex effect when rotating at ≥2000 rpm.

2. The grinding device for elevator traction sheaves as described in claim 1, characterized in that, An air supply block (50) is installed inside the polishing brush (24); The air supply block (50) has multiple air pressure grooves (51) inside; Each of the multiple air pressure grooves (51) is slidably connected to a sliding rod (52), and the multiple sliding rods (52) are slidably connected to the corresponding air pressure grooves (51) through air plugs; The gas supply block (50) has a connecting groove (53) inside, the connecting groove (53) connects the multiple pressure grooves (51) to each other, and the connecting groove (53) provides air pressure to the multiple pressure grooves (51). A push spring (54) is installed inside the connecting groove (53); One end of the push spring (54) is equipped with a compression plate (55), which is in a sealed sliding connection with the connecting groove (53), and the movement of the compression plate (55) regulates the air pressure in the connecting groove (53).

3. A grinding device for elevator traction sheaves as described in claim 2, characterized in that, The air supply block (50) has a vent hole on one side of the extrusion plate (55). The vent hole is not limited by the air pressure of the extrusion plate (55) near the push spring (54) when the extrusion plate (55) slides. An air replenishment pump is installed on the extrusion plate (55), and the blowing end of the air replenishment pump is located in the connecting groove (53).

4. A grinding device for elevator traction sheaves as described in claim 2, characterized in that, The sliding rod (52) has an installation groove (60) inside; An installation block (61) is slidably disposed in the installation groove (60), and the installation block (61) is connected to the bristles of the polishing brush (24); A first magnet (62) is installed at one end of the mounting block (61); A second magnet (63) is installed in the mounting slot (60), and the second magnet (63) works in conjunction with the first magnet (62) to fix the mounting block (61); The polishing brush (24) is provided with multiple mounting blocks (61), and the bristles are connected to the polishing brush (24) through the multiple mounting blocks (61), so that the worn bristles in the corresponding area can be replaced through the mounting blocks (61).

5. An application for an elevator traction sheave as described in any one of claims 1-4.

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