Door hanging wheel for elevator transmission mechanism and processing technology thereof

Abstract

The present invention discloses a door hanging wheel for elevator transmission mechanism and its processing technology, including a hanging wheel body, the hanging wheel body is provided with a central groove, the hanging wheel body is provided with a central through hole, the hanging wheel body is bent to form a bending part, the bending part includes a connecting part, a second stretching side wall and a rolling groove forming part, the inner periphery of the bending part is connected to the end of the hanging wheel body, and the rolling groove forming part is formed with a rolling groove by rotary sectioning; the processing technology includes the following steps: S1, plate making; S2, center stretching; S3, peripheral stretching; S4, peripheral radial extrusion molding; S5, center punching; S6, rotary section extrusion molding. The present invention has the following advantages and effects: the door hanging wheel structure has the effects of convenient processing, low cost and long service life; the processing technology adopts the method of integrated stamping molding and splitting and spinning, which has the effects of convenient processing and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of elevator components, and in particular to a door hanging wheel used in an elevator transmission mechanism and a processing technology thereof. Background Art

[0002] At present, with the increase of high-rise buildings, the use of elevators is becoming more and more extensive, and thus the requirements for the door hanging wheels on the elevator door system hanging plates are becoming higher and higher. The structure of these door hanging wheels is basically composed of a wheel core and a wheel shell. A rolling groove is set on the circumference of the wheel shell, and a polyurethane coating is applied to the rolling groove. The groove shape of the existing rolling groove is basically an arc shape, and the door hanging wheel cooperates with a guide rail or a hanging rope.

[0003] The current door hanger processing technology on the market usually adopts casting and welding. The door hanger blank processed by casting usually has sand holes on the surface, which will affect the service life of the door hanger to a certain extent. In addition, the cast door hanger has a large deadweight, so installing it on the elevator car will undoubtedly increase the weight of the elevator car, resulting in increased energy consumption and higher operating costs during the operation of the elevator. In addition, the subsequent processing cost of the cast door hanger is also high. When using welding technology to process door hangers, there are risks such as cold welding, desoldering or loose welding.

[0004] Therefore, there is an urgent need for a door hanging wheel with low processing cost, light weight, convenient processing and long service life, and a processing technology for processing the above-mentioned door hanging wheel. Summary of the invention

[0005] The object of the present invention is to provide a door hanging wheel for elevator transmission mechanism, which has the effects of convenient processing, low cost and long service life. The object of the present invention is to provide a processing technology for processing the door hanging wheel of elevator transmission mechanism, which adopts the method of integral stamping and splitting, and has the effects of convenient processing and low cost.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: a door pulley for an elevator transmission mechanism, comprising a pulley body, a center groove coaxially arranged at the center of the pulley body, a center through hole opened at one end face of the pulley body, and a bending portion formed by bending on the outer wall of the pulley body. The bending portion comprises a connecting portion, a second stretching side wall and a rolling groove forming portion. The inner periphery of the bending portion is connected to the end of the pulley body, the connecting portion is integrally connected to the pulley body, the second stretching side wall is tightly attached to the outer wall of the pulley body, and the rolling groove forming portion is formed with a rolling groove by rotary sectioning.

[0007] By adopting the above technical scheme, since the second stretching side wall is close to the outer wall of the hanging wheel body and the thickness of the close-fitting part is relatively large, when the hanging rope is hung in the rolling groove, the outside of the hanging wheel body has a strong supporting force and is not easy to deform. In addition, since the rolling groove side wall is formed by half-sectioning the rolling groove forming part, its side wall is relatively thin, so it has a lighter weight. Therefore, it is installed on the elevator car to reduce the weight of the elevator car, so that the energy consumption of the elevator is reduced during operation; compared with the traditional technology of integral molding by casting, it can also avoid the formation of sand holes on the surface, and has the effect of longer service life and convenient processing; and compared with the traditional technology of welding, since the hanging wheel body, the bending part and the rolling groove are all integrally stretched and formed, it has higher firmness and lower cost.

[0008] The present invention is further configured as follows: the connecting portion is vertically connected to the inner side of the second stretching side wall, and the groove forming portion is vertically connected to the outer wall of the second stretching side wall.

[0009] The present invention is further configured as follows: the axial width of the second stretching side wall is configured as 1 / 2 of the axial width of the outer wall of the pulley body.

[0010] By adopting the above technical solution, the stretching width of the second stretching side wall is set to 1 / 2 of the width of the pulley body, so that the center of the rolling groove after rotary sectioning is at the same distance from the two ends of the pulley body.

[0011] The present invention is further configured as follows: the rolling groove includes two symmetrical arc-shaped pieces, and the wall thickness of each arc-shaped piece is 1 / 2 of the wall thickness of the bending portion.

[0012] By adopting the above technical solution, the thickness of the arc-shaped sheets on both sides is only half of the bending part, which has the effects of lighter weight, uniform weight distribution on both sides, and stronger supporting strength of the bending part.

[0013] Another technical purpose of the present invention is achieved through the following technical solution: A processing technology for processing a door hanging wheel, comprising the following steps:

[0014] S1. Plate making: Use a punch press to punch out a number of plates on the steel plate;

[0015] S2, center stretching: a punch press is used to punch the center of the plate in the axial direction, and a center groove is formed by punching and stretching, so as to obtain a first intermediate piece, wherein the bottom of the center groove is a first stretching portion, and the side wall of the center groove is a first stretching side wall;

[0016] S3, peripheral stretching: the outer edge of the first middle piece is punched axially by a punching machine, and the punching direction is the same as the punching direction of S2. The outer periphery of the first middle piece is punched to form a second stretching portion and a second stretching side wall, and a connecting portion is formed between the second stretching side wall and the first stretching side wall, so as to obtain the second middle piece;

[0017] S4, peripheral radial extrusion molding: using a punch press to extrude the second middle piece radially from the periphery to the center of the second stretched side wall, so that the second stretched side wall is closely attached to the first stretched side wall, to obtain a third middle piece;

[0018] S5, center punching: punching the center of the first stretching portion of the third intermediate piece along the axial direction using a punching machine to form a coaxial center through hole in the center groove to obtain a fourth intermediate piece;

[0019] S6. Spin-extrusion molding: After the fourth middle piece is pressed and positioned axially by a spinning machine, the second stretching portion is radially split by a spinning machine cutter assembly while rotating, and the two halves of the split thin sheets are spun to form rolling grooves to obtain a door hanging wheel.

[0020] By adopting the above technical solution, after the punch press punches the plate off the steel plate, it is sequentially subjected to the processes of central stretching, peripheral stretching, and peripheral radial extrusion to form a bending portion, and then a central through hole is punched in the central groove, and finally the second stretched portion is radially profiled and extruded to quickly form a rolling groove. The second stretched portion is radially profiled and then extruded to form a rolling groove. Compared with directly spinning the second stretched portion into a rolling groove, on the one hand, the amount of plate can be reduced to reduce production costs, and on the other hand, the deadweight can be greatly reduced to save energy and reduce consumption. The process of making the door hanging wheel in this way has the effects of more convenient processing and lower cost, and because the whole is made of a piece of steel plate by stamping, its deadweight is lighter than that of casting. In addition, the utilization rate of the steel plate stamped into the plate is higher.

[0021] The present invention is further configured as follows: the plate punched out in S1 is a disc-shaped plate, and the punching machine adopts a cylindrical punch.

[0022] The present invention is further configured as follows: the stamping depth in S2 is L1, the stamping depth in S3 is L2, and the ratio of L1 to L2 is set in the range of 1.8 to 2.0.

[0023] By adopting the above technical solution, the position of the final rolling groove can be controlled relatively to the center position, avoiding the phenomenon of the rolling groove being offset relative to the overall end surface, thereby improving the stability of the door hanging wheel during rolling and reducing shaking.

[0024] The present invention is further configured as follows: the diameter of the disc-shaped plate in S1 is set to d1, the inner diameter of the central groove in S2 is d2, and the ratio range of d2 to d1 is set to 0.29 to 0.30; the radial width of the connecting portion is set to d3, the radial width of the second stretching portion is set to d4, and the ratio of d2: d3: d4 is set to 48:10:21.

[0025] By adopting the above technical solution, the ratios among d1, d2, d3 and d4 are set reasonably, so that it can withstand the larger pulling force when the pull rope hung on the door hanging wheel is pulled, the overall bearing capacity is higher, and it is not easy to deform.

[0026] The present invention is further configured as follows: the punch presses in S1, S2 and S5 all use cylindrical punches with corresponding diameters, and the punch press in S3 uses a tubular punch.

[0027] The present invention is further configured as follows: the spinning machine in S6 includes a spinning head and a cutter head, the spinning head and the cutter head are arranged opposite and symmetrically, and the head of the spinning head is arranged in an arc shape corresponding to the notch of the rolling groove.

[0028] By adopting the above technical scheme, during rotary extrusion molding, the outer edge of the second stretching portion is first radially cut by the cutter head so that a V shape is formed between the two thin sheets after cutting. When the cut part is rotated to the rotating head, the rotating head extrude the two thin sheets formed after cutting to form an arc-shaped sheet, and the two symmetrical arc-shaped sheets can form a rolling groove.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. The outer wall of the hanging wheel body is bent to form a bending part, and the rolling groove is formed on the outermost edge of the bending part by rotation. This has the effect of lighter weight, thereby reducing the energy consumption during the operation of the elevator. Compared with the one-piece molding method of casting in the traditional technology, it can also avoid the formation of sand holes on the surface, and has the effect of longer service life and convenient processing; and compared with the welding method in the traditional technology, since the hanging wheel body, the bending part and the rolling groove are all formed by integral stretching, it has higher firmness and lower cost;

[0031] 2. After the plate is punched off the steel plate by a punch press, it is stretched and extruded in sequence, and the groove is formed by rotary extrusion. Compared with the second stretching part directly spinning into the groove, on the one hand, the amount of plate can be reduced to reduce the production cost, and on the other hand, the dead weight can be greatly reduced, energy saving and consumption reduction; the process of making the door hanging wheel in this way has the effect of more convenient processing and lower cost, and because the whole is made of a piece of steel plate by stamping, its dead weight is lighter than that of casting. In addition, the utilization rate of the steel plate stamped into the plate is higher;

[0032] 3. The proportions among d1, d2, d3 and d4 are reasonably set, so that it can withstand the higher pulling force when the pull rope hung on the door hanging wheel is pulled, and the overall bearing capacity is higher and it is not easy to deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structural relationship of the embodiment.

[0034] Figure 2It is a cross-sectional view of the overall structure in the embodiment.

[0035] Figure 3 Schematic diagram of structural changes in the molding process S1-S6 of the embodiment, wherein the molding states are all cross-sectional states.

[0036] Figure 4 It is a schematic diagram of the punch forming die structure in step S3 of the embodiment.

[0037] Figure 5 It is a schematic diagram of the punch forming die structure in step S4 of the embodiment.

[0038] Figure 6 It is a schematic diagram of the structural relationship of the rotary sectioning molding in step S6 of the embodiment.

[0039] In the figure: 1. the hanging wheel body; 11. the central groove; 12. the first stretching side wall; 13. the first stretching part; 14. the central through hole; 15. the shoulder; 2. the bending part; 21. the connecting part; 22. the second stretching side wall; 23. the second stretching part; 231. the arc-shaped sheet; 232. the rolling groove; 3. the disc-shaped plate; 4. the first middle piece; 5. the second middle piece; 6. the third middle piece; 7. the fourth middle piece; 81. the first upper die; 82. the first lower die; 821. the stamping groove; 83. the second upper die; 831. the notch; 84. the second lower die; 841. the molding groove; 91. the rotation positioning device; 92. the spinning head; 93. the cutter head. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] A door hanging wheel for elevator transmission mechanism and its processing technology, such as Figure 1 and Figure 2 The figure is a schematic diagram of the overall structural relationship of the door hanging wheel, which includes a hanging wheel body 1. The center of the hanging wheel body 1 is formed with a center groove 11 by stamping and stretching. The center groove 11 is coaxial with the hanging wheel body 1. The side wall of the center groove 11 is a first stretched side wall 12. A center through hole 14 is provided on one end face of the hanging wheel body 1. An annular shoulder 15 is radially inwardly provided on the end face of the hanging wheel body 1 with the center through hole 14. When the bearing is installed in the center groove 11, the end face of the bearing and the annular shoulder 15 resist and limit, which has a good limiting effect.

[0042] like Figure 2 and Figure 3As shown, the end surface of the hanging wheel body 1 away from the central through hole 14 is bent outward to form a bending portion 2, and the bending portion 2 includes a connecting portion 21, a second stretching side wall 22 and a rolling groove forming portion. The second stretching side wall 22 is parallel to and closely attached to the first stretching side wall 12, and the connecting portion 21 and the rolling groove forming portion are perpendicular to the second stretching side wall 22. The rolling groove forming portion is formed into two thin sheets by radial rotation, and the two thin sheets are formed into two symmetrical arc-shaped sheets 231 after rotation. The two arc-shaped sheets 231 can form a rolling groove 232. The wall thickness of each arc-shaped sheet 231 is 1 / 2 of the wall thickness of the bending portion 2, and it has a lighter weight, and the supporting strength of the bending portion 2 is stronger. The axial width of the second stretched side wall 22 is set to 1 / 2 of the axial width of the outer wall of the pulley body 1, so that the center of the rolling groove 232 after rotational sectioning is at the same distance from the two ends of the pulley body 1, and the outermost ends of the outer walls of the two arc-shaped pieces 231 forming the rolling groove 232 are flush with the end face of the pulley body 1.

[0043] Since the second stretching side wall 22 is in close contact with the outer wall of the hanging wheel body 1, the thickness of the close contact part is relatively large, when the hanging rope is hung in the rolling groove 232, the outside of the hanging wheel body 1 has a strong supporting force and is not easy to deform. In addition, since the side wall of the rolling groove 232 is formed by half-sectioning the rolling groove forming part, its side wall is relatively thin, so it has a lighter weight. Therefore, it is installed on the elevator car to reduce the weight of the elevator car, so that the energy consumption of the elevator is reduced during operation; compared with the traditional technology of integral molding by casting, it can also avoid the formation of sand holes on the surface, and has the effect of longer service life and convenient processing; and compared with the traditional technology of welding, since the hanging wheel body 1, the bending part 2 and the rolling groove 232 are all integrally stretched and formed, it has higher firmness and lower cost.

[0044] like Figure 3 The figure shows a schematic diagram of the door hanging wheel processing process. The processing steps of the door hanging wheel are as follows:

[0045] S1, plate making: a punch press is used to punch out a number of disc-shaped plates 3 on a steel plate with a thickness of 3 mm. The diameter d1 of the disc-shaped plates 3 is 81 mm, and the punch press correspondingly uses a cylindrical punch with a diameter of 81 mm;

[0046] S2, center stretching: a cylindrical punch of a punching machine is used to punch the center of the plate in the axial direction, the diameter of the cylindrical punch is 24 mm, and a center groove 11 is formed by punching and stretching. The inner diameter d2 of the center groove 11 is 24 mm, and the punching depth L1 is 10.5 mm. In this way, the first intermediate piece 4 is obtained. In this step, the hanging wheel body 1 is mainly formed, the bottom of the center groove 11 is the first stretching part 13, and the side wall of the center groove 11 is the first stretching side wall 12. Due to the effect of the stretching force, the first stretching side wall 12 and the first stretching part 13 become thinner during the stretching process, and the thickness thereof is 2.5 mm.

[0047] S3, peripheral stretching: the outer edge of the first middle piece 4 is punched axially by a punch of a circular tube, and the punching direction is the same as that of S2. The outer periphery of the first middle piece 4 is punched to form a second stretching portion 23 (i.e., a groove forming portion) and a second stretching side wall 22. The radial width d4 of the second stretching portion 23 is set to 10.5 mm, and the punching depth L2 of the second stretching portion 23 is 5.5 mm. A connecting portion 21 is formed between the second stretching side wall 22 and the first stretching side wall 12, and thus the second middle piece 5 is manufactured;

[0048] S4, peripheral radial extrusion molding: the second middle piece 5 is extruded radially from the outer periphery to the center of the second stretching side wall 22 by a punch press, so that the second stretching side wall 22 is closely attached to the first stretching side wall 12, and the third middle piece 6 is obtained. After extrusion, the radial width d3 of the connecting portion 21 is 5 mm;

[0049] S5, center punching: a cylindrical punch of a punching machine is used to punch the center of the first stretched portion 13 of the third intermediate piece 6 along the axial direction to form a coaxial center through hole 14 in the center groove 11. The punch diameter is 26 mm, and the diameter of the center through hole 14 is correspondingly 26 mm. An annular shoulder 15 is formed between the outer periphery of the center through hole 14 and the first stretched side wall 12, and thus the fourth intermediate piece 7 is manufactured;

[0050] S6. Rotary extrusion molding: After the fourth middle piece 7 is axially pressed and positioned by the rotary positioning device 91 of the spinning machine, the second stretching portion 23 is radially cut from the outer edge by the cutter head 93 on the spinning machine while rotating. The two halves formed after cutting are V-shaped. When the cut part is rotated to the rotating head, the rotating head extrude the two thin sheets formed after cutting to form an arc-shaped sheet 231. The two symmetrical arc-shaped sheets 231 form a rolling groove 232, and the door hanging wheel can be obtained.

[0051] The punching pressure in S1 and S5 was set to 65 tons, the punching pressure in S2-S4 was set to 215 tons, and the spinning speed in S6 was set to 800 rpm.

[0052] like Figure 4 As shown, the punch press used in S3 includes a first punch die set, which includes a round tubular punch as a first upper die 81 and a first lower die 82 with a punching groove 821, and the punching groove 821 is for the round tubular punch to extend into.

[0053] like Figure 5As shown, the punch press used in S4 includes a second punch die set, which includes a solid punch serving as a second upper die 83 and a second lower die 84 having a molding groove 841. An upper recess 831 is provided on the lower end face of the second upper die. The second middle piece 5 is placed between the second upper die and the second lower die. When the second upper die 83 and the second lower die 84 are closed, a radial extrusion force is generated on the second middle piece 5 to form a third middle piece 6.

[0054] like Figure 6 As shown, the spinning machine in S6 includes a spinning head 92 and a cutter head 93 . The spinning head 92 and the cutter head 93 are arranged opposite and symmetrically. The head of the spinning head 92 is arranged in an arc shape corresponding to the notch of the rolling groove 232 .

[0055] The basic working principle of the present invention is: after a plate is punched off a steel plate by a punching machine, it is sequentially subjected to the processes of central stretching, peripheral stretching, and peripheral radial extrusion to form a bending portion 2, and then the central through hole 14 is formed by punching the central groove 11, and finally the second stretching portion 23 is radially profiled and spun to quickly form a rolling groove 232. The second stretching portion 23 is radially profiled and then spun to form a rolling groove 232. Compared with directly spinning the second stretching portion 23 into a rolling groove 232, on the one hand, the amount of plate can be reduced, thereby reducing production costs, and on the other hand, the deadweight can be greatly reduced to save energy and reduce consumption. The position of the final formed rolling groove 232 can be relatively controlled at the center position to avoid the phenomenon of the rolling groove 232 being offset relative to the overall end face, thereby improving the stability of the door hanging wheel during rolling and reducing the shaking phenomenon. The process of making the door hanging wheel in this way has the effects of more convenient processing and lower cost. Since the whole is stamped from a piece of steel plate, its dead weight is lighter than that of casting. In addition, the utilization rate of the steel plate stamped into a circular plate is higher.

[0056] The proportions among d1, d2, d3 and d4 are reasonably set, so that it can withstand the higher pulling force when the pull rope hung on the door hanging wheel is pulled, and the overall bearing capacity is higher and it is not easy to deform.

[0057] The above description is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A processing technology for processing a door hanging wheel of an elevator transmission mechanism, the door hanging wheel comprising a hanging wheel body (1), the hanging wheel body (1) is coaxially provided with a central groove (11), and one end surface of the hanging wheel body (1) is provided with a central through hole (14), characterized in that: The outer wall of the hanging wheel body (1) is also bent to form a bending portion, the bending portion includes a connecting portion (21), a second stretching side wall (22) and a rolling groove forming portion, the inner periphery of the bending portion is connected to the end of the hanging wheel body (1), the connecting portion (21) is integrally connected to the hanging wheel body (1), the second stretching side wall (22) is tightly attached to the outer wall of the hanging wheel body (1), and the rolling groove forming portion is formed with a rolling groove (232) by rotary sectioning; It also includes the following steps, S1. Plate making: Use a punch press to punch out a number of plates on the steel plate; S2, center stretching: using a punch press to punch the center of the plate in the axial direction, punching and stretching to form a center groove (11), so as to obtain a first intermediate member (4), wherein the bottom of the center groove (11) is a first stretching portion (13), and the side wall of the center groove (11) is a first stretching side wall (12); S3, peripheral stretching: using a punching machine to punch the outer edge of the first middle piece (4) along the axial direction, the punching direction is the same as the punching direction of S2, the outer periphery of the first middle piece (4) is punched to form a second stretching portion (23) and a second stretching side wall (22), and a connecting portion (21) is formed between the second stretching side wall (22) and the first stretching side wall (12), so as to obtain a second middle piece (5); S4, peripheral radial extrusion molding: using a punch press to extrude the second middle piece (5) radially from the periphery to the center of the second stretching side wall (22), so that the second stretching side wall (22) and the first stretching side wall (12) are closely attached to each other, thereby obtaining a third middle piece (6); S5, center punching: using a punching machine to punch the center of the first stretching portion (13) of the third middle piece (6) along the axial direction, forming a coaxial center through hole (14) in the center groove (11), thereby obtaining a fourth middle piece (7); S6, rotary extrusion molding: after the fourth intermediate piece (7) is pressed and positioned in the axial direction by a spinning machine, the second stretching portion (23) is radially split by a spinning machine cutter assembly while rotating, and the two sheets formed in half after splitting are spun to form a rolling groove (232), so that the door hanging wheel can be obtained; The punched-off plate in S1 is a disc-shaped plate (3), the diameter of the disc-shaped plate (3) is set to d1, the inner diameter of the central groove (11) in S2 is d2, and the ratio range of d2 to d1 is set to 0.29 to 0.30; the radial width of the connecting portion (21) is set to d3, the radial width of the second stretching portion (23) is set to d4, and the ratio of d2: d3: d4 is set to 48:10:

21.

2. A process for processing a door hanging wheel of an elevator transmission mechanism according to claim 1, characterized in that: The connecting portion (21) is vertically connected to the inner side of the second stretching side wall (22), and the groove forming portion is vertically connected to the outer wall of the second stretching side wall (22).

3. A process for processing a door hanging wheel of an elevator transmission mechanism according to claim 1, characterized in that: The axial width of the second stretching side wall (22) is set to 1 / 2 of the axial width of the outer wall of the hanging wheel body (1).

4. The processing technology for processing the door hanging wheel of the elevator transmission mechanism according to claim 1 is characterized in that: The rolling groove (232) comprises two symmetrical arc-shaped pieces (231), and the wall thickness of each arc-shaped piece (231) is 1 / 2 of the wall thickness of the bending portion.

5. The processing technology for processing the door hanging wheel of the elevator transmission mechanism according to claim 1 is characterized in that: The punch press adopts a cylindrical punch.

6. The processing technology for processing the door hanging wheel of the elevator transmission mechanism according to claim 1 is characterized in that: The stamping depth in S2 is L1, the stamping depth in S3 is L2, and the ratio of L1 to L2 is set in the range of 1.8 to 2.

0.

7. The processing technology for processing the door hanging wheel of the elevator transmission mechanism according to claim 1 is characterized in that: The punch presses in S1, S2 and S5 all use cylindrical punches of corresponding diameters, and the punch press in S3 uses a tubular punch.

8. The process for processing a door hanging wheel of an elevator transmission mechanism according to claim 1, characterized in that: The spinning machine in S6 comprises a spinning head (92) and a cutter head (93), wherein the spinning head (92) and the cutter head (93) are arranged opposite to and symmetrically with each other, and the head of the spinning head (92) is arranged in an arc shape corresponding to the notch of the rolling groove (232).

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