Polishing device for elevator traction sheave

Abstract

The invention relates to a polishing device for an elevator traction sheave, and relates to the technical field of traction sheave machining, the polishing device comprises a workbench main body, a clamping piece and a polishing assembly, the clamping piece is installed on the workbench main body; the grinding assembly comprises a rotating motor installed on the workbench body. A supporting pipe is mounted at the output end of the rotating motor; a plurality of bifurcated pipes are mounted on the surface of the supporting pipe; and polishing brushes are mounted at one ends of the multiple bifurcated pipes. The traction wheel is polished through the circular polishing brush, chippings can be cleaned through radial centrifugal force generated during polishing, the chippings can be cleaned in cooperation with air blowing, the chipping cleaning effect is improved, the roots of bristles are prevented from caking, the effective polishing area is increased, meanwhile, the chippings are adsorbed through the installed electrostatic adsorption plate, and the grinding efficiency is improved. The cleaning degree of chippings in the bristles is improved, and meanwhile, the chippings can be prevented from flying, and the influence on air in a working area and environmental sanitation can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of traction wheel processing, and particularly to a grinding device for an elevator traction wheel. Background Art

[0002] During the machining and maintenance of elevator traction wheels, the grinding of the bottom of the groove and the rim is a key process to ensure the surface accuracy and the service life of the wire rope. Moreover, the surface condition of the traction wheel is crucial for the safety and stability of elevator operation. Due to long-term use, the surface of the traction wheel may have problems such as wear, corrosion, or foreign matter adhesion. If these problems are not handled in time, it may lead to slippage of the traction rope, increased noise, and even safety accidents. Therefore, regular grinding of the traction wheel has become one of the important links in elevator maintenance.

[0003] Comparative Document 1 discloses an elevator wheel surface finishing device and process with the authorized announcement number of "CN114770254 B". The hydraulic driving member drives the linkage locking mechanism to operate, causing the screw sleeve to rotate and cooperate with the screw hole of the traction wheel to fix the traction wheel. Then, the grinding member is brought close to the traction wheel, and the traction wheel rotates through the rotating table for grinding. Another quick-locking device is installed with the traction wheel for grinding to improve the processing efficiency.

[0004] In the above actual process, the generated metal debris often remains on the surface of the traction wheel and the root of the brush hairs, forming a caking phenomenon. These residues not only affect the grinding effect but also may damage the surface of the traction wheel and reduce the grinding efficiency. The flying of debris is a common problem in traditional grinding methods. Especially when operating in an open environment, the scattered debris will have a negative impact on the air quality of the working area, threaten the health of the operators, and increase the cleaning cost. Summary of the Invention

[0005] In view of the technical problems existing in the prior art, the present invention provides a grinding device for an elevator traction wheel. A circular grinding brush is used to grind the traction wheel. The radial centrifugal force generated during the grinding process can effectively throw out most of the debris, preventing it from depositing at the root of the brush hairs, thereby maintaining an effective grinding area, improving the grinding efficiency and quality. It is also equipped with a blower, which can further clean the debris while grinding. This combination method can not only more thoroughly remove the surface debris but also prevent them from reattaching to the traction wheel, ensuring a smooth and residue-free surface after grinding. Finally, the electrostatic adsorption plate can attract and fix the fine metal debris, thereby greatly improving the cleaning degree of the debris in the brush hairs.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: A grinding device for an elevator traction wheel, including a workbench main body, a clamping member, and a grinding assembly. Among them, the clamping member is installed on the workbench main body; the grinding assembly includes a rotating motor installed on the workbench main body; a support pipe is installed at the output end of the rotating motor; a plurality of bifurcated pipes are installed on the surface of the support pipe; grinding brushes are installed at one ends of the plurality of bifurcated pipes.

[0007] The bristles on the grinding brush are designed in a conical shape, and the diameter of the grinding brush base matches the opening of the traction wheel groove.

[0008] A supply air pipe is rotatably connected inside the support pipe, a blowing member is installed on the supply air pipe, a plurality of dividing grooves are opened on the grinding brush, and a plurality of air blowing holes communicating with the corresponding dividing grooves are opened on the grinding brush.

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

[0010] A plurality of flexible bristles are installed at the bristle ends of the grinding brush, and the plurality of flexible bristles are in an umbrella shape.

[0011] The bristles of the grinding brush are spiral.

[0012] An air supply block is installed inside the grinding brush; a plurality of air pressure grooves are opened in the air supply block; a plurality of sliding rods are respectively slidably connected in the plurality of air pressure grooves, and the plurality of sliding rods are slidably connected to the corresponding air pressure grooves through air plugs; a communication groove is opened in the air supply block, and the communication groove communicates the plurality of air pressure grooves with each other, and the communication groove provides air pressure for the plurality of air pressure grooves; a pushing spring is installed in the communication groove; one end of the pushing spring is installed with a pressing plate, the pressing plate is hermetically slidably connected to the communication groove, and the movement of the pressing plate regulates the air pressure in the communication groove.

[0013] An air permeation hole is opened on one side of the air supply block where the pressing plate is located, and the air permeation hole is not restricted by the air pressure of the pressing plate on the side close to the pushing spring when the pressing plate slides. An air replenishing pump is installed on the pressing plate, and the blowing end of the air replenishing pump is located in the communication groove.

[0014] An installation groove is opened in the sliding rod; an installation block is slidably arranged in the installation groove, and the installation block is connected to the bristles of the grinding 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 cooperates with the first magnet to fix the installation block; a plurality of installation blocks are arranged on the grinding brush, and the bristles are connected to the grinding brush through the plurality of installation blocks, and the worn bristles in the corresponding area can be replaced through the installation blocks.

[0015] Application of a chamfering machine as described in any one of the above in the processing of ductile iron pipes.

[0016] The beneficial effects of the present invention are as follows: The traction wheel is polished by a circular polishing brush. The radial centrifugal force generated during polishing can clean the debris. In cooperation with blowing, the debris can be cleaned, improving the effect of debris cleaning, avoiding caking at the root of the brush hairs, increasing the effective polishing area. At the same time, an electrostatic adsorption plate is installed to adsorb the debris, improving the degree of debris cleaning in the brush hairs, and also avoiding the flying of debris, which may affect the air and environmental sanitation in the working area. Description of the Drawings

[0017] Figure 1 Schematic structural diagram of a polishing device for an elevator traction wheel; Figure 2 Schematic diagram of the workbench main body of a polishing device for an elevator traction wheel; Figure 3 A polishing device for an elevator traction wheel Figure 1 Enlarged view at A in; Figure 4 Schematic structural diagram of the rotating motor of Embodiment 1 of a polishing device for an elevator traction wheel; Figure 5 Schematic structural diagram of the flexible brush hairs of Embodiment 2 of a polishing device for an elevator traction wheel; Figure 6 Schematic structural diagram of the polishing brush of Embodiment 3 of a polishing device for an elevator traction wheel; Figure 7 Partial structural diagram of the polishing brush of Embodiment 3 of a polishing device for an elevator traction wheel; Figure 8 Schematic structural diagram of the polishing brush of Embodiment 4 of a polishing device for an elevator traction wheel; Figure 9 Schematic structural diagram of the air supply block of Embodiment 4 of a polishing device for an elevator traction wheel; Figure 10 Cross-sectional view of the air supply block of Embodiment 4 of a polishing device for an elevator traction wheel; Figure 11 A polishing device for an elevator traction wheel Figure 10 Enlarged view at B in.

[0018] In the drawings, the list of components represented by each reference numeral is as follows: 1. Workbench main body; 11. Clamping member; 2. Grinding assembly; 21. Rotating motor; 22. Support pipe; 23. Forked pipe; 24. Grinding brush; 25. Air supply pipe; 26. Blowing member; 28. Air blowing hole; 3. Electrostatic adsorption plate; 4. Flexible bristles; 50. Air supply block; 51. Air pressure groove; 52. Sliding rod; 53. Communication groove; 54. Push spring; 55. Extrusion plate; 60. Installation groove; 61. Installation block; 62. First magnet; 63. Second magnet. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.

[0020] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0021] In the description of the present application, the term "for example" is used to mean "serving as an example, illustration, or description". Any embodiment described as "for example" in the present application is not necessarily construed as being more preferred or having more advantages than other embodiments. In order for any person skilled in the art to implement and use the present invention, the following description is given. In the following description, details are set forth for the purpose of explanation. It should be understood that those of ordinary skill in the art can recognize that the present invention can be implemented without these specific details. In other instances, well-known structures and processes are not described in detail to avoid unnecessary details from obscuring the description of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the present application.

[0022] Embodiment 1 Please refer to Figures 1-4, an embodiment of the present invention provides a grinding device for an elevator traction wheel, including a workbench main body 1, a clamping member 11, and a grinding assembly 2. Among them, the clamping member 11 is installed on the workbench main body 1; the grinding assembly 2 includes a rotating motor 21 installed on the workbench main body 1; the output end of the rotating motor 21 is installed with a support pipe 22; a plurality of bifurcated pipes 23 are installed on the surface of the support pipe 22; a grinding brush 24 is installed at one end of the plurality of bifurcated pipes 23.

[0023] The bristles on the grinding brush 24 are designed in a conical shape, and the diameter of the base of the grinding brush 24 matches the opening of the groove of the traction wheel.

[0024] It should be noted that the grinding brush 24 with a conical design divides the bristles of the grinding brush 24 into multiple layers, and the bristles of each layer are designed in a conical shape. The conical bristles are used to enter the grooves of the elevator traction wheel to improve the grinding effect on the grooves of the elevator traction wheel. At the same time, it can also avoid large local stress, reduce the damage to the elevator traction wheel caused by large local stress during grinding.

[0025] A gas supply pipe 25 is rotatably connected inside the support pipe 22. A blowing member 26 is installed on the gas supply pipe 25. A plurality of dividing grooves are provided on the grinding brush 24, and a plurality of air blowing holes 28 communicating with the corresponding dividing grooves are provided on the grinding brush.

[0026] It should be noted that the blowing angle can also be controlled by a control member, so that only the air blowing holes 28 on one side of the electrostatic adsorption plate 3 can discharge air normally. In this way, the debris blown out through the air blowing holes 28 can be adsorbed and collected in cooperation with the electrostatic adsorption plate 3, avoiding the floating of debris everywhere.

[0027] An electrostatic adsorption plate 3 is installed on the workbench main body 1, and a collection box is installed on the workbench main body 1. The collection box is located below the electrostatic adsorption plate 3.

[0028] It should be noted that when grinding the elevator traction wheel, the electrostatic adsorption plate 3 is in a working state, that is, the static electricity generated by the electrostatic adsorption plate 3 at this time can adsorb the debris generated by grinding. After grinding an elevator traction wheel, or when the adsorbed debris is relatively large, the static electricity on the electrostatic adsorption plate 3 can be turned off, so that the debris adsorbed by the electrostatic adsorption plate 3 falls into the collection box, and then the cleaning of the debris can be completed. And when turning off the static electricity on the electrostatic adsorption plate 3, the blowing member 26 needs to be turned off to avoid continuous blowing, so that the wind blows the falling debris, resulting in the flying of some debris and affecting the air quality in the processing area.

[0029] It should be noted that the blowing member 26 is installed on the electrostatic adsorption plate 3. The blowing member 26 can cooperate with the electrostatic adsorption plate 3 to position the air supply pipe 25. One end of the air supply pipe 25 is rotatably connected to the support pipe 22. When the elevator traction wheel is being polished, air is blown into the air supply pipe 25 through the blowing member 26, then flows from the air supply pipe 25 into the support pipe 22 and the bifurcated pipe 23, then into the dividing groove, and finally is discharged through the air holes 28. The discharged air can blow the debris on the polishing brush 24, achieving the purpose of cleaning part of the debris.

[0030] Specific implementation: When the traction wheel needs to be polished, first fix the traction wheel through the clamping member 11. After fixing, drive the traction wheel to rotate through the clamping member 11. While the traction wheel is rotating, control the rotation of the rotation motor 21 through the control switch. The rotation of the rotation motor 21 will drive the polishing brush 24 to polish the rotating traction wheel.

[0031] The circular polishing brush 24 polishes the traction wheel. The radial centrifugal force generated during polishing can clean the debris. Combining with blowing can clean the debris, improving the effect of debris cleaning, avoiding caking at the root of the bristles, increasing the effective polishing area. At the same time, installing the electrostatic adsorption plate 3 adsorbs the debris, improving the degree of debris cleaning in the bristles, and also avoiding the flying of debris, which may affect the air and environmental hygiene in the working area.

[0032] Embodiment 2 Since the traditional rigid brush cannot reach the narrow groove bottom due to diameter limitations, resulting in residual oxide layers and accelerating the wear of the wire rope, improvements are made. Please refer to Figure 5 , this embodiment of the present invention provides a polishing device for an elevator traction wheel. A flexible brush hair 4 is installed at the bristle end of the polishing brush 24, and the flexible brush hair 4 is in an umbrella shape.

[0033] It should be noted that the flexible brush hair 4 is made of ultra-fine copper-plated steel wire.

[0034] The polishing of the traction wheel is achieved through the elastic deformation of the ultra-fine copper-plated steel wire. In the initial state, that is, in the free state, the flexible brush hair 4 is arranged radially at 15°. When the brush is pressed into the wheel groove, the brush hair expands outward under the extrusion of the side wall into an umbrella-shaped structure with a diameter of Φ10mm. Combining with the high-frequency axial swing, the dynamic impact force generated by the bending and rebounding of the brush hair and the spiral sweeping trajectory cover the dead corners at the bottom of the groove, and at the same time, the debris is discharged through the centrifugal effect.

[0035] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages: The flexible bristles 4 expand outwards into an umbrella-shaped structure, increasing the contact area of the groove bottom by 1.8 times, raising the coverage rate from 75% to 98%, reducing the roughness Ra from 3.2 μm to 0.8 μm, shortening the single grinding time by about 70% (from 45 minutes to 12 minutes), extending the service life of the wire rope by about 65% (from 180,000 times to 300,000 cycles), and adapting to 4-12 mm wide and narrow grooves, solving the core pain points that traditional rigid brushes cannot reach the groove bottom and have insufficient pressure.

[0036] Embodiment 3 Since the solution relies on the inertial rotation of the brush to passively shed chips, but at low speeds or during intermittent machining (such as when the rotational speed < 1000 rpm), the centrifugal force is not sufficient to overcome the adhesion force between the chips and the bristles, resulting in chip retention. In addition, the linear contact mode between the straight bristles and the rope groove makes the chips easily migrate axially along the bristles to the root, forming "lumps at the root of the bristles", which not only reduces the effective grinding area but also accelerates the bristle breakage due to local stress concentration. Therefore, improvements are made; Please refer to Figure 6 and Figure 7 , the embodiment of the present invention provides a grinding device for an elevator traction wheel, and the bristles of the grinding brush 24 are spiral.

[0037] It should be noted that in this application document, the rotating motor 21 is designed to be movable. In this way, after the elevator traction wheel is installed on the clamping member 11, by moving the rotating motor 21, the grinding brush 24 can be driven to be in close contact with the elevator traction wheel, facilitating the subsequent grinding work. At the same time, the electrostatic adsorption plate 3 and the rotating motor 21 are on the same moving part, so that when the rotating motor 21 moves, the electrostatic adsorption plate 3 can be driven to move synchronously to avoid changes in the distance between the two, which affects the air supply pipe 26.

[0038] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Through geometric reconstruction, a dynamic self-cleaning function is realized. When the spiral bristles rotate (≥2000 rpm), the radial centrifugal force and axial vortex effect can achieve the following effects: Improved chip removal rate: The spiral gaps form continuous chip removal channels, and the chips are thrown away along the spiral tangent direction under the action of centrifugal force. Compared with straight bristles, the chip accumulation is reduced by 70%; Optimized contact mechanics: The spiral structure upgrades the contact between the bristles and the rope groove from line contact to surface contact, uniformizes the pressure distribution, reduces the load of a single brush wire by 50%, and extends the life by 30%; Improved machining quality: Real-time chip removal avoids "secondary rolling", and the surface roughness (Ra) of the rope groove is optimized from 3.2 μm to below 1.0 μm, and there are no scratch defects.

[0039] It should be noted that after the bristles of the grinding brush 24 are worn, the elevator traction sheave can also be ground gradiently by using the bristles. By adjusting the height of the elevator traction sheave, the position to be ground of the elevator traction sheave can be moved to a place with less wear or more wear, so as to realize gradient grinding of the elevator traction sheave. The wear degree of the bristles of the grinding brush 24 can be detected manually or by using image comparison to judge the wear degree of the bristles of the grinding brush 24.

[0040] Embodiment 4 In order to improve the uniformity of the grinding of the elevator traction sheave by the grinding brush 24, further improvements are made; Please refer to Figures 8-11 , the embodiment of the present invention provides a grinding device for an elevator traction sheave. An air supply block 50 is installed in the grinding brush 24; a plurality of air pressure grooves 51 are formed in the air supply block 50; a sliding rod 52 is slidably connected in each of the plurality of air pressure grooves 51, and the plurality of sliding rods 52 are slidably connected to the corresponding air pressure grooves 51 through air plugs; a communication groove 53 is formed in the air supply block 50, and the communication groove 53 communicates the plurality of air pressure grooves 51 with each other, and the communication groove 53 provides air pressure for the plurality of air pressure grooves 51; a pushing spring 54 is installed in the communication groove 53; one end of the pushing spring 54 is provided with a pressing plate 55, and the pressing plate 55 is slidably connected to the communication groove 53 in a sealed manner, and the movement of the pressing plate 55 regulates the air pressure in the communication groove 53.

[0041] It should be noted that in the initial state, under the push of the gas in the communication groove 53 and the air pressure grooves 51, the sliding rod 52 is in an extended state, and a limiting rod is installed on the sliding rod 52 to limit the moving length of the sliding rod 52 to prevent the sliding rod 52 from moving out of the air pressure groove 51. After that, when the grinding brush 24 drives the sliding rod 52 to move, it can be specifically contracted according to the concavity and convexity of the elevator traction sheave.

[0042] An air vent hole is formed on one side of the air supply block 50 where the pressing plate 55 is located. The air vent hole is not restricted by the air pressure of the pressing plate 55 on the side close to the pushing spring 54 when the pressing plate 55 slides. A gas replenishing pump is installed on the pressing plate 55, and the blowing end of the gas replenishing pump is located in the communication groove 53.

[0043] It should be noted that the gas replenishing pump on the pressing plate 55 can regularly replenish gas into the communication groove 53 to avoid insufficient air pressure in the communication groove 53 caused by poor airtightness, which affects the push of the sliding rod 52.

[0044] An installation groove 60 is formed in the sliding rod 52; an installation block 61 is slidably arranged in the installation groove 60, and the installation block 61 is connected to the bristles of the grinding 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.

[0045] Specifically, after the elevator traction sheave is installed on the clamping member 11, by moving the grinding brush 24, the movement of the grinding brush 24 will cause the grinding brush 24 to approach the elevator traction sheave, and then it can drive the sliding rod 52 and the installation block 61 inside the sliding rod 52 to approach the elevator traction sheave. Finally, the bristles on the installation block 61 can be brought into contact with the elevator traction sheave. At the same time, the air pressure in the communication 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 closely attached to the elevator traction sheave, thereby improving the uniformity of grinding the elevator traction sheave.

[0046] After the air pressure in the communication groove 53 and the air pressure groove 51 pushes the sliding rod 52, the accommodation space for gas in the air pressure groove 51 increases, which will cause the air pressure in the communication groove 53 and the air pressure groove 51 to decrease. At this time, the push spring 54 pushes the pressing plate 55, and the pressing plate 55 squeezes the gas inside the communication groove 53, so as to stabilize the air pressure area in the communication groove 53 and the air pressure groove 51.

[0047] A plurality of installation blocks 61 are arranged on the grinding brush 24. By connecting the bristles to the grinding brush 24 through the plurality of installation blocks 61, the worn bristles in the corresponding area can be replaced through the installation blocks 61.

[0048] It should be noted that when the bristles in some areas are damaged or worn severely, the bristles on the installation block 61 can be directly pulled, so that the first magnet 62 on the installation block 61 is no longer connected to the second magnet 63. Then, a new installation block 61 is taken out and inserted into the installation groove 60, and the first magnet 62 on the installation block 61 is connected to the second magnet 63, and the replacement of the damaged brush can be completed.

[0049] An application of the chamfering machine according to any one of the above in the processing of cast iron pipes.

[0050] The technical solutions in the embodiments of the present application described above have at least the following technical effects or advantages: The elevator traction wheel is polished by the bristles on multiple groups of independently distributed mounting blocks 61. When facing the irregular polishing surface of the elevator traction wheel, the air pressure in the communication groove 53 and the air pressure groove 51 can be used to push the bristles to different positions, improving the degree of fitting between the bristles and the elevator traction wheel. At the same time, under the push of the same air pressure, the fitting pressures of the bristles at different positions are the same, significantly improving the polishing uniformity. At the same time, the independently distributed bristles are connected by the first magnet 62 and the second magnet 63, which is convenient for replacing some bristles and reducing the polishing cost.

[0051] It should be noted that in the above embodiments, the descriptions of each embodiment have their own emphases. For the parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A grinding device for an elevator traction wheel, characterized in that, It includes a workbench main body (1), a clamping member (11), and a grinding assembly (2). Among them, the clamping member (11) is installed on the workbench main body (1); the grinding assembly (2) includes a rotating motor (21) installed on the workbench main body (1); a support pipe (22) is installed at the output end of the rotating motor (21); a plurality of bifurcated pipes (23) are installed on the surface of the support pipe (22); grinding brushes (24) are installed at one ends of the plurality of bifurcated pipes (23).

2. The grinding device for an elevator traction sheave according to claim 1, wherein The bristles on the grinding brush (24) are of a conical design, and the diameter of the base of the grinding brush (24) matches the opening of the traction wheel groove.

3. A grinding device for an elevator traction wheel according to claim 1, characterized in that, An air supply pipe (25) is rotatably connected inside the support pipe (22). An air blowing member (26) is installed on the air supply pipe (25). A plurality of dividing grooves are formed in the grinding brush (24), and a plurality of air blowing holes (28) communicating with the corresponding dividing grooves are formed in the grinding brush.

4. A grinding device for an elevator traction sheave according to claim 1, characterized in that, An electrostatic adsorption plate (3) is installed on the workbench main body (1), and a collection box is installed on the workbench main body (1). The collection box is located below the electrostatic adsorption plate (3).

5. A grinding device for an elevator traction sheave according to claim 1, characterized in that, A plurality of flexible bristles (4) are installed at the bristle ends of the grinding brush (24). The plurality of flexible bristles (4) are in an umbrella shape.

6. The grinding device for an elevator traction sheave according to claim 2, wherein The bristles of the grinding brush (24) are spiral.

7. The grinding device for an elevator traction sheave according to claim 1, wherein, An air supply block (50) is installed inside the grinding brush (24); a plurality of air pressure grooves (51) are formed inside the air supply block (50); sliding rods (52) are respectively slidably connected inside the plurality of air pressure grooves (51). The plurality of sliding rods (52) are slidably connected to the corresponding air pressure grooves (51) through air plugs; a communication groove (53) is formed inside the air supply block (50). The communication groove (53) communicates the plurality of air pressure grooves (51) with each other, and the communication groove (53) provides air pressure for the plurality of air pressure grooves (51); a pushing spring (54) is installed inside the communication groove (53); one end of the pushing spring (54) is installed with a pressing plate (55). The pressing plate (55) is hermetically slidably connected to the communication groove (53), and the movement of the pressing plate (55) regulates the air pressure inside the communication groove (53).

8. A grinding device for an elevator traction sheave according to claim 7, characterized in that, An air permeable hole is formed on one side of the air supply block (50) where the pressing plate (55) is located. The air permeable hole is not restricted by the air pressure of the pressing plate (55) on the side close to the pushing spring (54) when the pressing plate (55) slides. A air replenishing pump is installed on the pressing plate (55), and the blowing end of the air replenishing pump is located inside the communication groove (53).

9. A grinding device for an elevator traction sheave according to claim 7, characterized in that, An installation groove (60) is formed inside the sliding rod (52); an installation block (61) is slidably arranged inside the installation groove (60). The installation block (61) is connected to the bristles of the grinding brush (24); one end of the installation block (61) is installed with a first magnet (62); a second magnet (63) is installed inside the installation groove (60). The installation block (61) is fixed by the cooperation of the second magnet (63) and the first magnet (62); A plurality of mounting blocks (61) are arranged on the grinding brush (24), and the bristles are connected to the grinding brush (24) through the plurality of mounting blocks (61), so that the bristles worn in the corresponding area can be replaced through the mounting blocks (61).

10. An application of any one of claims 1-9 to an elevator traction sheave.

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