A method for preparing high-torque friction plates for elevator traction machines and its drilling equipment.

Abstract

This invention discloses a method for preparing a high-torque friction plate for elevator traction machines and its drilling equipment. The material formula of the friction plate, calculated by weight percentage, is: 5-20% inorganic fiber, 10-50% binder, 1-10% coke, 5-20% rubber, 1-5% accelerator, 10-30% other friction performance modifiers, and 1-5% carbon black. The beneficial effects of this invention are: the friction plate prepared using the described formula exhibits significantly increased torque, enhancing product reliability and service life; the invention includes a drilling equipment, which, through a clamping mechanism and a floating support mechanism, allows the drilling equipment to accommodate friction plates of varying lengths and curvatures, thereby improving the practicality of the device.

Description

Technical Field

[0001] This invention relates to the field of friction plate processing technology for elevator traction machines, specifically a method for preparing high-torque friction plates for elevator traction machines and its drilling equipment. Background Technology

[0002] With societal development, high-rise buildings and large shopping malls are increasingly common, making the use of passenger elevators a growing trend. Elevator safety is directly related to people's lives, especially given the frequent elevator accidents in recent years. The causes of these accidents are generally twofold: one is the elevator's electrical control system, and the other is the elevator's friction plates. Poor impact performance, easy wear, and breakage of the friction plates can contribute to these problems. Therefore, improving elevator safety performance is a societal development trend, urgently requiring research into high-performance, high-torque elevator friction plates with a low accident rate.

[0003] Utility model patent CN218193844U discloses a clamping device for a drum friction plate drilling machine. This clamping device, through a clamping mechanism, allows the clamping block, fixedly connected to the handle, to move in the same direction when the handle is rotated counterclockwise. When the side with the largest fan-shaped area at the top of the clamping block is above the two edges of the friction plate, the drum friction plate is fixed under the assistance of the arc-shaped fixing block and the squeezing action of the clamping block. At this point, the drilling machine can drill holes in the friction plate with high precision and safety. After drilling is complete, rotating the handle clockwise releases the clamping block from the top of the drum friction plate, allowing it to be easily removed. However, this clamping device is not suitable for friction plates of different lengths and curvatures, resulting in low practicality. Summary of the Invention

[0004] The purpose of this invention is to solve the existing problems by providing a method for preparing high-torque friction plates for elevator traction machines and a drilling device thereof.

[0005] The technical solution of the present invention is as follows:

[0006] A method for preparing a high-torque friction pad for an elevator traction machine, wherein the material formulation of the friction pad, calculated by weight percentage, is: 5-20% inorganic fiber, 10-50% binder, 1-10% coke, 5-20% rubber, 1-5% accelerator, 10-30% other friction performance modifiers, and 1-5% carbon black; the preparation method of the friction pad includes the following steps:

[0007] S1: Ingredient preparation: Accurately weigh each component raw material according to the above weight percentages for the friction pad material formula, and set aside.

[0008] S2: Mixing. Put the ingredients from S1 into a 75L internal mixer and mix for 10-40 minutes.

[0009] S3: Pressing, using a 50T hot press, with pressure set at 35-60 MPa, temperature set at 150-175℃, and pressing time at 4-6 minutes;

[0010] S4: Heat treatment, place the pressed friction sheet in an oven for 4 to 12 hours, and set the temperature to 150 to 200℃.

[0011] S5: Grinding process, placing the friction plate from S4 in a belt grinder for grinding at a speed of 3000-3600 rpm;

[0012] S6: Turning. Machining the outer diameter of the friction plate using a lathe. Set the lathe spindle speed to 800-1000 r / min and the feed rate to 0.06-0.12 mm. Turn the outer diameter of the friction plate to the required dimensions.

[0013] S7: Packaging, the coded friction pads are packaged using a plastic sealing and packing machine.

[0014] Preferably, the adhesive is made of rubber and liquid resin in a weight ratio of 1:1.

[0015] The present invention also provides a high-torque friction plate drilling device for elevator traction machines, including a bracket, a platform on the bracket, two guide rails and an adjustment mechanism fixedly connected to the platform, a worktable slidably connected to the two guide rails, and a clamping mechanism and a floating support mechanism on the worktable;

[0016] The adjustment mechanism includes a support rod, a connecting rod, a first motor, a second motor, and a drilling machine. Support rods are fixedly connected to both sides of the platform. A movable groove is formed within the support rod, and a gear is meshed within the movable groove. The first motor is driven by the gear. A connecting rod is fixedly connected to the surface of the first motor. A movable groove is formed within the connecting rod, and a gear is meshed within the movable groove. The second motor is driven by the gear. The end of the gear furthest from the second motor is rotatably connected to the drilling machine. The drilling machine is slidably connected to the connecting rod.

[0017] Preferably, the clamping mechanism includes a pressure block, an adjusting rod, a fixed seat, a horizontal plate, a first guide sleeve, a first guide post, a first spring, and a locking mechanism. The horizontal plate is disposed on the worktable, and a fixed seat is fixedly connected to the upper surface of the horizontal plate. A through groove is provided on the fixed seat, and an adjusting rod is slidably disposed in the through groove. A pressure block is fixedly connected to the end of the adjusting rod away from the fixed seat. A first guide sleeve is fixedly connected to the lower surface of the horizontal plate, and a first guide post is sleeved inside the first guide sleeve. The first guide post is fixedly connected to the worktable, and a first spring is sleeved outside the first guide sleeve and the first guide post. The two ends of the first spring are fixedly connected to the horizontal plate and the worktable, respectively. A locking mechanism is provided between the two first guide posts.

[0018] Preferably, the locking mechanism includes a first fixed box, a pressing plate, a pressing rod, a second spring, a sliding plate, a first wedge, a second wedge, a third spring, a locking block, and a second fixed box. One end of the first fixed box is fixedly connected to a horizontal plate, and the other end is fitted with a sleeve in the second fixed box. The second fixed box is fixedly connected to the worktable. One end of the pressing rod passes through the horizontal plate and is fixedly connected to the pressing plate, and the other end extends into the first fixed box and is fixedly connected to the sliding plate. A second spring is sleeved on the upper end of the pressing rod. One end of the second spring is fixedly connected to the pressing plate, and the other end is fixedly connected to the first fixed box. Both ends of the sliding plate are fixedly connected to a first wedge with an inwardly inclined surface. The upper end of the second wedge is slidably connected to the inclined surface of the first wedge, and the lower end of the second wedge is slidably connected to the inner wall of the first fixed box. A third spring is fixedly connected between the two second wedges. The locking block passes through the first fixed box and is fixedly connected to the second wedge. One-way teeth are provided on the surface of the locking block, and a slot that engages with the one-way teeth of the locking block is provided on the inner wall of the second fixed box.

[0019] Preferably, the floating support mechanism includes a floating support block, a fixed support block, a second guide post, a second guide sleeve, and a fourth spring. The floating support block abuts against the bottom of the friction plate, the fixed support block is fixedly connected to the worktable, the second guide post and the second guide sleeve are fitted together, and their two ends are rotatably connected to the fixed support block and the floating support block respectively through a rotating shaft, and the fourth spring is sleeved on the outside of the second guide post and the second guide sleeve.

[0020] Preferably, the bottom of the bracket is fixedly connected to multiple sets of support bases and pulleys.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention utilizes scientific and reasonable operating procedures to improve product quality while reducing enterprise production costs. The friction pads produced by this invention using the aforementioned formula exhibit significantly increased torque, enhancing product reliability and service life. This invention also includes a drilling device, which, through a clamping mechanism and a floating support mechanism, can accommodate friction pads of different lengths and curvatures, thereby improving the practicality of the device. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the drilling device in this invention;

[0024] Figure 2 This is a front view of the drilling device in this invention;

[0025] Figure 3 for Figure 1 Enlarged view of part A in the image;

[0026] Figure 4 This is a cross-sectional view of the clamping mechanism in this invention;

[0027] In the attached diagram: 1. Bracket; 2. Platform; 3. Guide rail; 4. Adjustment mechanism; 5. Worktable; 6. Clamping mechanism; 7. Floating support mechanism; 8. Support rod; 9. Connecting rod; 10. First motor; 11. Second motor; 12. Drilling machine; 13. Pressing block; 14. Adjusting rod; 15. Fixed seat; 16. Horizontal plate; 17. First guide sleeve; 18. First guide post; 19. First spring; 20. Locking mechanism; 21. First fixed box; 22. Pressing plate; 23. Pressing rod; 24. Second spring; 25. Slide plate; 26. First wedge; 27. Second wedge; 28. Third spring; 29. ​​Locking block; 30. Second fixed box; 31. Floating support block; 32. Fixed support block; 33. Second guide post; 34. Second guide sleeve; 35. Fourth spring. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1-4As shown, a method for preparing a high-torque friction pad for an elevator traction machine includes the following material formulation by weight percentage: 5 parts inorganic fiber, 10 parts adhesive, 1 part coke, 5 parts rubber, 1 part accelerator, 10 parts other friction performance modifiers, and 1 part carbon black; the preparation method of the friction pad includes the following steps:

[0031] S1: Ingredient preparation: Accurately weigh each component raw material according to the above weight percentages for the friction pad material formula, and set aside.

[0032] S2: Mixing. Put the ingredients from S1 into a 75L internal mixer and mix for 10 minutes.

[0033] S3: Pressing, using a 50T hot press, pressure set at 35Mpa, temperature set at 150℃, pressing time at 4min;

[0034] S4: Heat treatment, place the pressed friction sheet in an oven for 4 hours, and set the temperature to 150℃.

[0035] S5: Grinding process, placing the friction plate from S4 into a belt grinder and grinding at a speed of 3000 rpm;

[0036] S6: Turning. Machining the outer diameter of the friction plate using a lathe. Set the lathe spindle speed to 800 r / min and the feed rate to 0.06 mm. Turn the outer diameter of the friction plate to the required size.

[0037] S7: Packaging, the coded friction pads are packaged using a plastic sealing and packing machine.

[0038] Furthermore, the adhesive uses rubber and liquid resin in a weight ratio of 1:1.

[0039] Example 2

[0040] like Figure 1-4 As shown, a method for preparing a high-torque friction pad for an elevator traction machine includes the following material formulation by weight percentage: 20 parts inorganic fiber, 50 parts adhesive, 10 parts coke, 20 parts rubber, 5 parts accelerator, 30 parts other friction performance modifiers, and 5 parts carbon black; the preparation method of the friction pad includes the following steps:

[0041] S1: Ingredient preparation: Accurately weigh each component raw material according to the above weight percentages for the friction pad material formula, and set aside.

[0042] S2: Mixing. Put the ingredients from S1 into a 75L internal mixer and mix for 40 minutes.

[0043] S3: Pressing, using a 50T hot press, pressure set at 60Mpa, temperature set at 175℃, pressing time at 6min;

[0044] S4: Heat treatment, place the pressed friction sheet in an oven for 12 hours, and set the temperature to 200℃.

[0045] S5: Grinding process, placing the friction plate from S4 into a belt grinder and grinding at a speed of 3600 rpm;

[0046] S6: Turning. Machining the outer diameter of the friction plate using a lathe. Set the lathe spindle speed to 1000 r / min and the feed rate to 0.12 mm. Turn the outer diameter of the friction plate to the required size.

[0047] S7: Packaging, the coded friction pads are packaged using a plastic sealing and packing machine.

[0048] Furthermore, the adhesive uses rubber and liquid resin in a weight ratio of 1:1.

[0049] Example 3

[0050] like Figure 1-4 As shown, a method for preparing a high-torque friction pad for an elevator traction machine includes the following material formulation by weight percentage: 12 parts inorganic fiber, 30 parts adhesive, 5 parts coke, 12 parts rubber, 3 parts accelerator, 20 parts other friction performance modifiers, and 3 parts carbon black; the preparation method of the friction pad includes the following steps:

[0051] S1: Ingredient preparation: Accurately weigh each component raw material according to the above weight percentages for the friction pad material formula, and set aside.

[0052] S2: Mixing. Put the ingredients from S1 into a 75L internal mixer and mix for 35 minutes.

[0053] S3: Pressing, using a 50T hot press, pressure set at 48Mpa, temperature set at 160℃, pressing time at 5min;

[0054] S4: Heat treatment, place the pressed friction sheet in an oven for 12 hours at a temperature of 175℃.

[0055] S5: Grinding process, placing the friction plate from S4 into a belt grinder and grinding at a speed of 3300 rpm;

[0056] S6: Turning. Machining the outer diameter of the friction plate using a lathe. Set the lathe spindle speed to 900 r / min and the feed rate to 0.09 mm. Turn the outer diameter of the friction plate to the required dimensions.

[0057] S7: Packaging, the coded friction pads are packaged using a plastic sealing and packing machine.

[0058] Furthermore, the adhesive uses rubber and liquid resin in a weight ratio of 1:1.

[0059] To verify the effectiveness of the present invention, the friction plates prepared in Examples 1-3 and existing friction plates were tested on a constant speed friction testing machine, a torque measuring instrument, and a friction plate service life testing instrument, respectively. The results are as follows:

[0060] Comparative test results of torque performance and tribological wear performance of the two types of friction plates:

[0061]

[0062] Verification results show that, compared with existing similar products, the friction pads prepared using the formulation and preparation method of this invention have higher wear resistance and torque.

[0063] Example 4

[0064] like Figure 1-4 As shown, a high-torque friction plate drilling device for elevator traction machines includes a bracket 1, a platform 2 on the bracket 1, two guide rails 3 and an adjustment mechanism 4 fixedly connected to the platform 2, a worktable 5 slidably connected to the two guide rails 3, and a clamping mechanism 6 and a floating support mechanism 7 on the worktable 5.

[0065] The adjustment mechanism 4 includes a support rod 8, a connecting rod 9, a first motor 10, a second motor 11, and a drilling machine 12. The support rod 8 is fixedly connected to both sides of the platform 2. The support rod 8 has a moving groove, and a gear is meshed in the moving groove. The first motor 10 is driven by the gear. The connecting rod 9 is fixedly connected to the surface of the first motor 10. The connecting rod 9 has a moving groove, and a gear is meshed in the moving groove. The second motor 11 is driven by the gear. The end of the gear away from the second motor 11 is rotatably connected to the drilling machine 12. The drilling machine 12 is slidably connected to the connecting rod 9.

[0066] Furthermore, the clamping mechanism 6 includes a pressure block 13, an adjusting rod 14, a fixed seat 15, a horizontal plate 16, a first guide sleeve 17, a first guide post 18, a first spring 19, and a locking mechanism 20. The horizontal plate 16 is mounted on the worktable 5. The fixed seat 15 is fixedly connected to the upper surface of the horizontal plate 16. A through groove is provided on the fixed seat 15. The adjusting rod 14 is slidably mounted in the through groove. The pressure block 13 is fixedly connected to the end of the adjusting rod 14 away from the fixed seat 15. The first guide sleeve 17 is fixedly connected to the lower surface of the horizontal plate 16. The first guide post 18 is fitted inside the first guide sleeve 17. The first guide post 18 is fixedly connected to the worktable 5. The first spring 19 is fitted over the first guide sleeve 17 and the first guide post 18. The two ends of the first spring 19 are fixedly connected to the horizontal plate 16 and the worktable 5, respectively. A locking mechanism 20 is provided between the two first guide posts 18.

[0067] Furthermore, the locking mechanism 20 includes a first fixing box 21, a pressing plate 22, a pressing rod 23, a second spring 24, a sliding plate 25, a first wedge 26, a second wedge 27, a third spring 28, a locking block 29, and a second fixing box 30. One end of the first fixing box 21 is fixedly connected to the horizontal plate 16, and the other end is fitted into the second fixing box 30. The second fixing box 30 is fixedly connected to the worktable 5. One end of the pressing rod 23 passes through the horizontal plate 16 and is fixedly connected to the pressing plate 22, and the other end extends into the first fixing box 21 and is fixedly connected to the sliding plate 25. The upper end of the pressing rod 23 is fitted with a second spring. 24. One end of the second spring 24 is fixedly connected to the pressing plate 22, and the other end is fixedly connected to the first fixing box 21. Both ends of the slide plate 25 are fixedly connected to the first wedge block 26 with the inclined surface facing inward. The upper end of the second wedge block 27 is slidably connected to the inclined surface of the first wedge block 26, and the lower end of the second wedge block 27 is slidably connected to the inner wall of the first fixing box 21. A third spring 28 is fixedly connected between the two second wedge blocks 27. The locking block 29 passes through the first fixing box 21 and is fixedly connected to the second wedge block 27. The surface of the locking block 29 is provided with one-way teeth. The inner wall of the second fixing box 30 is provided with a locking groove that cooperates with the one-way teeth of the locking block 29.

[0068] Furthermore, the floating support mechanism 7 includes a floating support block 31, a fixed support block 32, a second guide post 33, a second guide sleeve 34, and a fourth spring 35. The floating support block 31 rests against the bottom of the friction plate, the fixed support block 32 is fixedly connected to the worktable 5, the second guide post 33 and the second guide sleeve 34 are fitted together, and their two ends are rotatably connected to the fixed support block 32 and the floating support block 31 respectively through a rotating shaft. The fourth spring 35 is sleeved on the outside of the second guide post 33 and the second guide sleeve 34.

[0069] Furthermore, the bottom of bracket 1 is fixedly connected to multiple sets of support bases and pulleys.

[0070] Working method: First, place the friction plate on the surface of the floating support block 31. Move the adjusting rod 14 so that the pressure block 13 faces both sides of the friction plate. Then, press the horizontal plate 16 to move the first fixed box 21 on the horizontal plate 16 into the interior of the second fixed box 22. During the movement, the one-way teeth on the side of the locking block 29 inside the first fixed box 21 engage with the locking groove on the inner wall of the second fixed box 30. Under the pressure, the floating support block 31 supporting the friction plate moves downward, eventually causing the floating support block 31 and the fixed support block 32 to abut against each other, thus supporting the friction plate. The pressure block 13 serves to fix the friction plate. When the friction plate needs to be removed, the pressing plate 22 is pressed down, causing the first wedge 26 on the slide plate 25 to slide downward. During the sliding process, the second wedge 27 and the first wedge 26 interact on their inclined surfaces, causing the second wedge 27 and the locking block 29 to move into the first fixing box 21, and causing the one-way teeth on the locking block 29 to disengage from the locking groove on the inner wall of the second fixing box 30. Finally, under the elastic force of the first spring 19, the horizontal plate 16 and the pressure block 13 are lifted upward, eliminating the fixed state of the friction plate.

[0071] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A drilling device for high-torque friction plates used in elevator traction machines, characterized in that: Includes a support (1), on which a platform (2) is provided, and on which two guide rails (3) and an adjustment mechanism (4) are fixedly connected, and on which a worktable (5) is slidably connected, and on which a clamping mechanism (6) and a floating support mechanism (7) are provided; The adjustment mechanism (4) includes a support rod (8), a connecting rod (9), a first motor (10), a second motor (11), and a drilling machine (12). The support rod (8) is fixedly connected to both sides of the platform (2). A moving groove is opened in the support rod (8), and a gear is toothed in the moving groove. The first motor (10) is driven by the gear. A connecting rod (9) is fixedly connected to the surface of the first motor (10). A moving groove is opened in the connecting rod (9), and a gear is toothed in the moving groove. The second motor (11) is driven by the gear. The end of the gear away from the second motor (11) is rotatably connected to the drilling machine (12). The drilling machine (12) is slidably connected to the connecting rod (9). The clamping mechanism (6) includes a pressure block (13), an adjusting rod (14), a fixed seat (15), a horizontal plate (16), a first guide sleeve (17), a first guide post (18), a first spring (19), and a locking mechanism (20). The horizontal plate (16) is mounted on the workbench (5), and the fixed seat (15) is fixedly connected to the upper surface of the horizontal plate (16). The fixed seat (15) has a through groove, and the adjusting rod (14) is slidably mounted in the through groove. The adjusting rod (14) is away from the fixed seat (15). One end is fixedly connected to a pressure block (13), and the lower surface of the horizontal plate (16) is fixedly connected to a first guide sleeve (17). The first guide sleeve (17) is fitted with a first guide post (18), which is fixedly connected to the worktable (5). The first guide sleeve (17) and the first guide post (18) are fitted with a first spring (19), which is fixedly connected to the horizontal plate (16) and the worktable (5) at both ends. A locking mechanism (20) is provided between the two first guide posts (18). The locking mechanism (20) includes a first fixed box (21), a pressing plate (22), a pressing rod (23), a second spring (24), a sliding plate (25), a first wedge (26), a second wedge (27), a third spring (28), a locking block (29), and a second fixed box (30). One end of the first fixed box (21) is fixedly connected to the horizontal plate (16), and the other end is fitted into the second fixed box (30). The second fixed box (30) is fixedly connected to the workbench (5). One end of the pressing rod (23) passes through the horizontal plate (16) and is fixedly connected to the pressing plate (22). The other end extends into the first fixed box (21) and is fixedly connected to the sliding plate (25). The upper end of the pressing rod (23) is fitted with a second spring (28). 4) One end of the second spring (24) is fixedly connected to the pressing plate (22), and the other end is fixedly connected to the first fixing box (21). Both ends of the slide plate (25) are fixedly connected to the first wedge (26) with the inclined surface facing inward. The upper end of the second wedge (27) is slidably connected to the inclined surface of the first wedge (26), and the lower end of the second wedge (27) is slidably connected to the inner wall of the first fixing box (21). A third spring (28) is fixedly connected between the two second wedges (27). The card block (29) passes through the first fixing box (21) and is fixedly connected to the second wedge (27). The surface of the card block (29) is provided with one-way teeth. The inner wall of the second fixing box (30) is provided with a slot that cooperates with the one-way teeth of the card block (29).

2. The high-torque friction plate drilling device for elevator traction machines according to claim 1, characterized in that: The floating support mechanism (7) includes a floating support block (31), a fixed support block (32), a second guide post (33), a second guide sleeve (34), and a fourth spring (35). The floating support block (31) abuts against the bottom of the friction plate. The fixed support block (32) is fixedly connected to the worktable (5). The second guide post (33) and the second guide sleeve (34) are fitted together and rotatably connected to the fixed support block (32) and the floating support block (31) respectively through a rotating shaft. The second guide post (33) and the second guide sleeve (34) are fitted with a fourth spring (35).

3. The high-torque friction plate drilling device for elevator traction machines according to claim 1, characterized in that: The bottom of the bracket (1) is fixedly connected to multiple sets of support bases and pulleys.

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