A disassembly and assembly jig for a disc type traction machine rotor assembly

Abstract

The present invention discloses a rotor disassembly and assembly jig for a disc-type elevator traction machine, comprising: a dummy shaft, which is fitted into the inner hole of the shaft portion on the housing of the disc-type elevator traction machine and locked to the shaft portion of the housing of the disc-type elevator traction machine during installation and disassembly, and an inner screw hole is arranged in the dummy shaft; a cylinder body which is locked to the rotor assembly of the disc-type elevator traction machine during installation; a supporting bolt arranged on the cylinder body, which is screwed into the inner screw hole of the dummy shaft during installation and disassembly to install the rotor assembly of the disc-type elevator traction machine on the housing; and the rotor assembly of the disc-type elevator traction machine is removed from the housing during disassembly. The feature of the present invention is that the suction force between the stator and the rotor is supported by the threaded pair between the supporting bolt and the inner screw hole in the dummy shaft, so as to achieve smooth installation and disassembly.

Description

Technical Field

[0001] The invention relates to the technical field of disc-type traction motor assembly, and in particular to a rotor disassembly and assembly jig for a disc-type traction machine of an elevator. Background Art

[0002] At present, the axial magnetic flux of the known elevator disc traction machine must overcome the strong axial electromagnetic force when assembling the rotor assembly to prevent the impact force formed by the rapid attraction of the stator and rotor assembly from damaging the bearing. The current solution is to control the axial attraction force through the support force formed by a specially designed hydraulic fixture, so as to achieve the purpose of smooth installation.

[0003] However, the hydraulic method has the following problems: 1) Pollution caused by leakage. The hydraulic cylinder is easily damaged and leaks after repeated use, causing pollution; 2) The hydraulic cylinder fixture is large in size and requires a lifting fixture to assist, so the installation site is often fixed; 3) The operation is inconvenient and requires several people to cooperate in the installation;

[0004] 4) Most of them require electric drive for hydraulic cylinders. It is difficult to disassemble and assemble the rotor at the elevator site in places where it is difficult to connect electricity on site. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a jig that can be used to quickly assemble and disassemble a disc traction machine rotor assembly in response to the above-mentioned shortcomings of the existing hydraulic jigs. The jig has the characteristics of small size, easy to carry, no pollution risk, precise positioning, and can be assembled and applied in the factory. It uses a compressed air wrench to save manpower, and can be disassembled and assembled by twisting an ordinary wrench at the elevator installation site.

[0006] In order to achieve the above-mentioned object, an elevator disc traction machine rotor disassembly and assembly jig of the present invention comprises:

[0007] A dummy shaft, which is fitted into the inner hole of the shaft portion on the housing of the elevator disc type traction machine and locked on the shaft portion of the housing of the elevator disc type traction machine during installation and removal, and an inner screw hole is arranged in the dummy shaft;

[0008] A cylinder that is locked onto the rotor assembly of the elevator disc traction machine during installation;

[0009] A support bolt is arranged on the cylinder. During installation and disassembly, the support bolt is screwed into the inner screw hole of the dummy shaft, and the first bearing inner diameter and the second bearing inner diameter in the rotor assembly of the elevator disc traction machine are respectively pressed onto the first shaft section and the second shaft section of the shaft part on the shell of the elevator disc traction machine through the cylinder, or taken out from the first shaft section and the second shaft section of the shaft part on the shell of the elevator disc traction machine.

[0010] In a preferred embodiment of the present invention, the outer diameter of the dummy shaft has a coaxial first outer diameter portion and a second outer diameter portion, the outer diameter of the first outer diameter portion is larger than the outer diameter of the second outer diameter portion and matches the inner diameter of the inner cavity of the cylinder; the inner hole of the shaft portion on the shell of the elevator disc type traction machine has a coaxial first inner hole and a second inner hole and the inner diameter of the first inner hole is smaller than the inner diameter of the second inner hole; the outer diameter of the first outer diameter portion is the same as the outer diameter of the first shaft segment, and the outer diameter of the second outer diameter portion matches the inner diameter of the first inner hole; during installation, the second outer diameter portion on the dummy shaft is inserted into the first inner hole and the step between the first outer diameter portion and the second outer diameter portion is pressed on the end of the shaft portion on the shell of the elevator disc type traction machine.

[0011] In a preferred embodiment of the present invention, a threaded hole is provided on the shell of the elevator disc type traction machine, and the threaded hole is coaxial with the inner hole of the shaft portion on the shell of the elevator disc type traction machine; a dummy shaft locking bolt through hole is also provided in the dummy shaft, and the dummy shaft locking bolt through hole is connected with and coaxial with the inner screw hole, and the inner diameter of the dummy shaft locking bolt through hole is smaller than the inner diameter of the inner screw hole; during installation, a dummy shaft locking bolt is passed through the inner screw hole and the bolt through hole in the dummy shaft and then screwed into the threaded hole on the shell of the elevator disc type traction machine to lock the dummy shaft on the shaft portion of the shell of the elevator disc type traction machine.

[0012] In a preferred embodiment of the present invention, an outer cone section is provided at one end of the first outer diameter portion of the dummy shaft away from the second outer diameter portion, the maximum outer diameter of the outer cone section is equal to the outer diameter of the first outer diameter portion, and when the rotor assembly of the elevator disc type traction machine is assembled to the housing of the elevator disc type traction machine, the outer cone section is introduced into the inner diameter of the first bearing.

[0013] In a preferred embodiment of the present invention, an inner cone guide hole is provided in the dummy shaft, the minimum inner diameter of the inner cone guide hole is equal to the inner diameter of the inner screw hole and they are interconnected; during installation, the support bolt is introduced into the inner screw hole through the inner cone guide hole.

[0014] In a preferred embodiment of the present invention, a rotor assembly mounting flange is provided at one end of the cylinder, and a plurality of connecting bolt through holes are circumferentially spaced on the rotor assembly mounting flange. During installation, the cylinder can be connected to the rotor assembly of the elevator disc traction machine by passing the connecting bolts through the connecting bolt through holes and screwing them into the bolt holes on the rotor assembly of the elevator disc traction machine.

[0015] In a preferred embodiment of the present invention, the rotor assembly mounting flange portion of the cylinder and the rotor assembly of the elevator disc traction machine are circumferentially positioned by means of a positioning structure in which a stopper and a stop groove cooperate with each other.

[0016] In a preferred embodiment of the present invention, the support bolt is disposed in the inner cavity of the cylinder through a bearing shaft; the outer diameter of the support bolt is interference fit with the inner diameter of the bearing.

[0017] In a preferred embodiment of the present invention, the bearing is a four-point contact ball bearing.

[0018] In a preferred embodiment of the present invention, a cushion block is further included, which is sleeved on the support screw and is located between the screw head of the support screw and the inner ring of the bearing.

[0019] In a preferred embodiment of the present invention, it further comprises a nut screwed on the support screw, the nut is located below the bearing and an elastic gasket is arranged between the nut and the inner ring of the bearing.

[0020] In a preferred embodiment of the present invention, an end cover is further included, and the end cover is locked to an end of the cylinder away from the mounting flange of the rotor assembly by end cover locking bolts.

[0021] In a preferred embodiment of the present invention, a lifting ring is locked on the end cover.

[0022] Due to the adoption of the above technical solution, compared with the prior art, the present invention is suitable for rapid assembly and disassembly of the rotor assembly of the disc traction machine, and the threaded pair between the support bolt and the inner screw hole in the dummy shaft supports the suction force between the stator and the rotor to achieve smooth installation and disassembly. At the same time, through the guidance of the dummy shaft and the cylinder, the rotor is installed concentrically on the stator.

[0023] The present invention has the following effects:

[0024] 1) The present invention has the characteristics of small size and lightness, and can be easily picked up and installed on the rotor assembly by hand;

[0025] 2) The present invention has a purely mechanical structure design and has no pollution risk caused by oil pollution.

[0026] 3) The operation is simple and can be completed by one person.

[0027] 4) It can be easily carried to the site for disassembly and assembly.

[0028] 5) For sites with limited conditions (such as no power supply), an ordinary wrench can be used to manually twist the support bolts to complete safety and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the appearance of the elevator disc traction machine rotor disassembly and assembly fixture (excluding the dummy shaft and the dummy shaft locking bolts) of the present invention.

[0030] Figure 2 It is a schematic structural diagram of the elevator disc traction machine rotor disassembly and assembly fixture (excluding the dummy shaft and the dummy shaft locking bolts) of the present invention.

[0031] Figure 3 It is a structural schematic diagram of the elevator disc traction machine rotor disassembly and assembly jig of the present invention when assembling the elevator disc traction machine rotor. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] See also Figures 1 to 3 , an elevator disc traction machine rotor disassembly and assembly fixture shown in the figure includes a dummy shaft 10, a cylinder 20, a support bolt 30, a bearing 40, a spacer 50, a nut 60, an elastic gasket 70, an end cover 80 and a lifting ring 90.

[0034] The outer diameter of the dummy shaft 10 has a coaxial first outer diameter portion 11 and a second outer diameter portion 12. The outer diameter of the first outer diameter portion 11 is larger than the outer diameter of the second outer diameter portion 12. An outer cone section 13 is provided at one end of the first outer diameter portion 11 of the dummy shaft 10 away from the second outer diameter portion 12. The maximum outer diameter of the outer cone section 13 is equal to the outer diameter of the first outer diameter portion 11.

[0035] In the dummy shaft 10, a coaxial inner cone guide hole 13, an inner screw hole 14 and a dummy shaft locking bolt through hole 15 are sequentially arranged along the axial direction of the dummy shaft 10 from the first outer diameter portion 11 to the second outer diameter portion 12. The minimum inner diameter of the inner cone guide hole 13 is equal to the inner diameter of the inner screw hole 14, the dummy shaft locking bolt through hole 15 is connected with the inner screw hole 14 and the inner diameter of the dummy shaft locking bolt through hole 15 is smaller than the inner diameter of the inner screw hole 14.

[0036] A rotor assembly mounting flange 21 is disposed at one end of the cylinder 20 . A plurality of rotor assembly connecting bolt through holes 21 a are circumferentially spaced apart on the rotor assembly mounting flange 21 , and a stop groove 21 b is disposed on the bottom surface of the rotor assembly mounting flange 21 .

[0037] The bearing 40 is a four-point contact ball bearing, which is installed in the inner cavity 22 of the cylinder 20 away from the rotor assembly mounting flange 21. An annular boss 23 is provided on the inner cavity 22 wall of the cylinder 20 on the side of the bearing 40 facing the rotor assembly mounting flange 21, and the annular boss 23 supports the outer ring of the bearing 40. In addition, the outer diameter of the outer ring of the bearing 40 is interference fit with the inner cavity 22 of the cylinder 20.

[0038] The support bolt 30 is composed of a bolt head 31, a polished rod section 32 and a threaded section 33. The polished rod section 32 is located between the bolt head 31 and the threaded section 33. The support bolt 30 passes through the bearing 40, and the outer diameter of the polished rod section 32 on the support bolt 30 is interference fit with the inner diameter of the inner ring of the bearing 40.

[0039] The spacer 50 is sleeved on the polished rod section 32 of the support bolt 30 and is located between the bolt head 31 and the inner ring of the bearing 40 .

[0040] The nut 60 is screwed onto the threaded section 33 of the supporting bolt 30 , and the elastic gasket 70 is sleeved onto the threaded section 33 of the supporting bolt 30 and is located between the nut 60 and the inner ring of the bearing 40 .

[0041] An end cover mounting flange portion 24 is provided on the outer wall of the cylinder body 20 at a side away from the rotor assembly mounting flange portion 21 , and a plurality of end cover mounting inner screw holes 24 a are provided circumferentially at intervals on the end cover mounting flange portion 24 .

[0042] An inner hole 81 is provided in the end cover 80, and a plurality of end cover locking bolt through holes 82 are provided at intervals on the periphery of the inner hole 81. The number and position of the end cover locking bolt through holes 82 correspond to the number and position of the end cover mounting inner screw holes 24a. During installation, the end cover 80 is buckled on the end cover mounting flange 24 and the end cover locking bolt through holes 82 are aligned with the end cover mounting inner screw holes 24a. The end cover locking bolts 83 are passed through the end cover locking bolt through holes 82, screwed into the end cover mounting inner screw holes 24a, and tightened to fix the end cover 80 on the end cover mounting flange 24. At this time, the bolt head 31 of the support bolt 30 passes through the inner hole 81 of the end cover 80, and the pad 50 is located in the inner hole 81 of the end cover 80.

[0043] A lifting ring 90 is locked on the end cover 80 to lift the rotor assembly.

[0044] The inner hole 111 of the shaft portion 110 on the housing 100 of the elevator disk type traction machine has a coaxial first inner hole 111a and a second inner hole 111b, and the inner diameter of the first inner hole 111a is smaller than the inner diameter of the second inner hole 111b; the outer diameter 112 of the shaft portion 110 has a first shaft section 112a and a second shaft section 112b, the outer diameter of the first shaft section 112a is the same as the outer diameter of the first outer diameter section 11, and the outer diameter of the second outer diameter section 12 matches the inner diameter of the first inner hole 111a. A threaded hole 120 is provided on the housing 100 of the elevator disk type traction machine, and the threaded hole 120 is coaxial with the inner hole 111 of the shaft portion 110 on the housing 100 of the elevator disk type traction machine and communicates with the second inner hole 111b.

[0045] When the rotor assembly 200 of the elevator disc traction machine needs to be installed, firstly, the second outer diameter portion 12 on the dummy shaft 10 is inserted into the first inner hole 111a and the step 17 between the first outer diameter portion 11 and the second outer diameter portion 12 is pressed on the end of the shaft portion 110d on the housing 100 of the elevator disc traction machine. Then, a dummy shaft locking bolt 18 is passed through the inner cone guide hole 13, the inner screw hole 14 and the dummy shaft locking bolt through hole 15 in the dummy shaft 10 and then screwed into the threaded hole 120 on the housing 100 of the elevator disc traction machine to lock the dummy shaft 10 on the shaft portion 110 of the housing 100 of the elevator disc traction machine, so that the dummy shaft 10 is concentric with the shaft portion 110d on the housing 100 of the elevator disc traction machine.

[0046] The stop groove 21b on the bottom surface of the rotor assembly mounting flange 21 of the cylinder 20 is placed on the stop step 210 of the rotor assembly 200, and the rotor assembly connecting bolt through holes 21a on the rotor assembly mounting flange 21 are aligned one by one with the bolt holes 211 on the stop step 210 of the rotor assembly 200. After the connecting bolts 300 are passed through the connecting bolt through holes 21a and screwed into the bolt holes 211 on the stop step 210 of the rotor assembly 200, the cylinder 200 can be connected to the rotor assembly 200.

[0047] The elevator disc traction machine rotor disassembly and assembly fixture of the present invention is hoisted as a whole to the top of the housing 100 except for the dummy shaft 10 and the dummy shaft locking bolts 18 and the rotor assembly 200 through the hoisting ring 90 on the end cover 80.

[0048] The rotor assembly 200 is gradually lowered so that the outer cone section 13 on the dummy shaft 10 gradually passes through the inner diameter of the second bearing 220 in the rotor assembly 200 and is introduced into the inner diameter of the first bearing 230 in the rotor assembly 200 and passes through the inner diameter of the first bearing 230 and is introduced into the inner cavity 22 of the cylinder 20 to position the rotor assembly 200; at this time, the threaded section 33 of the support bolt 30 is gradually guided to the inner screw hole 14 through the inner cone guide hole 13 in the dummy shaft 10.

[0049] The bolt head 31 of the support screw 30 is twisted by a compressed air wrench or a common wrench, so that the threaded section 33 of the support screw 30 is screwed into the inner screw hole 14. During the process of screwing the threaded section 33 of the support screw 30 into the inner screw hole 14, the bolt head 31 of the support screw 30 drives the rotor assembly 200 to move toward the housing 100 through the spacer 50, the bearing 40, the annular boss 23 on the cylinder 20, the cylinder 20 and the rotor assembly mounting flange 21, until the inner diameter of the second bearing 220 in the rotor assembly 200 is pressed onto the second shaft section 112b of the shaft section 110 of the housing 100, and the inner diameter of the first bearing 230 in the rotor assembly 200 is pressed onto the first shaft section 112a of the shaft section 110 of the housing 100.

[0050] After the rotor assembly 200 is assembled in place, the connecting bolts 300 are removed, and the elevator disc traction machine rotor disassembly and assembly fixture of the present invention except for the dummy shaft 10 and the dummy shaft locking bolts 18 can be removed from the rotor assembly 200, and then the dummy shaft locking bolts 18 are removed to remove the dummy shaft 10 from the shaft portion 110 of the shell 100.

[0051] The steps of removing the rotor assembly 200 from the housing 100 are opposite to the steps of installing the rotor assembly 200 to the housing 100 .

Claims

1. An elevator disc traction machine rotor disassembly and assembly fixture, characterized in that: include: A dummy shaft, which is fitted into the inner hole of the shaft portion on the housing of the elevator disc type traction machine and locked on the shaft portion of the housing of the elevator disc type traction machine during installation and removal, and an inner screw hole is arranged in the dummy shaft; A cylinder that is locked onto the rotor assembly of the elevator disc traction machine during installation; A support bolt is arranged on the cylinder body. When installing, the support bolt is screwed into the inner screw hole of the dummy shaft, and the rotor assembly of the elevator disc type traction machine is installed on the shell through the cylinder body; when disassembling, the rotor assembly of the elevator disc type traction machine is disassembled from the shell; The inner hole of the shaft portion on the housing of the elevator disc traction machine has a coaxial first inner hole and a second inner hole, and the inner diameter of the first inner hole is smaller than the inner diameter of the second inner hole; a threaded hole is arranged on the housing of the elevator disc traction machine, the threaded hole is coaxial with the inner hole of the shaft portion on the housing of the elevator disc traction machine and is connected to the second inner hole; the outer diameter of the dummy shaft has a coaxial first outer diameter part and a second outer diameter part, the outer diameter of the first outer diameter part is larger than the outer diameter of the second outer diameter part and matches the inner diameter of the inner cavity of the cylinder; the outer diameter of the first outer diameter part is the same as the outer diameter of the first shaft section, and the outer diameter of the second outer diameter part matches the inner diameter of the first inner hole; when installing, the second outer diameter part on the dummy shaft is inserted into the first inner hole and the step between the first outer diameter part and the second outer diameter part is pressed on the end of the shaft portion on the housing of the elevator disc traction machine; A rotor assembly mounting flange is provided at one end of the cylinder, and a plurality of connection bolt through holes are provided at intervals in the circumferential direction on the rotor assembly mounting flange. During installation, the cylinder can be connected to the rotor assembly of the elevator disc traction machine by passing the connection bolts through the connection bolt through holes and then screwing them into the bolt holes on the rotor assembly of the elevator disc traction machine. During installation, the cylinder presses the first bearing inner diameter and the second bearing inner diameter in the rotor assembly of the elevator disc traction machine onto the first shaft section and the second shaft section of the shaft portion on the housing of the elevator disc traction machine respectively.

2. The elevator disc traction machine rotor disassembly and assembly jig according to claim 1, characterized in that: During disassembly, the cylinder removes the first bearing inner diameter and the second bearing inner diameter in the rotor assembly of the elevator disc type traction machine from the first shaft section and the second shaft section of the shaft portion on the housing of the elevator disc type traction machine.

3. The elevator disc traction machine rotor disassembly and assembly jig according to claim 2, characterized in that: A dummy shaft locking bolt through hole is also provided in the dummy shaft, the dummy shaft locking bolt through hole is connected with the inner screw hole and is coaxial, and the inner diameter of the dummy shaft locking bolt through hole is smaller than the inner diameter of the inner screw hole; during installation, a dummy shaft locking bolt is passed through the inner screw hole and the bolt through hole in the dummy shaft and then screwed into the threaded hole on the shell of the elevator disc type traction machine to lock the dummy shaft on the shaft portion of the shell of the elevator disc type traction machine.

4. The elevator disc traction machine rotor disassembly and assembly jig according to claim 3, characterized in that: An outer cone section is provided at one end of the first outer diameter portion of the dummy shaft away from the second outer diameter portion, the maximum outer diameter of the outer cone section is equal to the outer diameter of the first outer diameter portion, and when the rotor assembly of the elevator disc type traction machine is assembled to the housing of the elevator disc type traction machine, the outer cone section is introduced into the inner diameter of the first bearing.

5. The elevator disc traction machine rotor disassembly and assembly jig according to claim 4, characterized in that: An inner cone guide hole is arranged in the dummy shaft, the minimum inner diameter of the inner cone guide hole is equal to the inner diameter of the inner screw hole and they are connected to each other; during installation, the support bolt is introduced into the inner screw hole through the inner cone guide hole.

6. The elevator disc traction machine rotor disassembly and assembly jig according to claim 5, characterized in that: The rotor assembly mounting flange of the cylinder and the rotor assembly of the elevator disc traction machine are circumferentially positioned by means of a positioning structure in which a stopper and a stop groove cooperate with each other.

7. The elevator disc traction machine rotor disassembly and assembly jig according to claim 6, characterized in that: The support bolt is arranged in the inner cavity of the cylinder through a bearing shaft; the outer diameter of the support bolt is interference fit with the inner diameter of the bearing.

8. The elevator disc traction machine rotor disassembly and assembly jig according to claim 7, characterized in that: The bearing is a four-point contact ball bearing.

9. The elevator disc traction machine rotor disassembly and assembly jig according to claim 8, characterized in that: The utility model also comprises a cushion block, which is sleeved on the support screw rod and is located between the screw rod head of the support screw rod and the inner ring of the bearing.

10. The elevator disc traction machine rotor disassembly and assembly jig according to claim 9, characterized in that: It also includes a nut screwed on the support screw rod, the nut is located below the bearing and an elastic gasket is arranged between the nut and the inner ring of the bearing.

11. The elevator disc traction machine rotor disassembly and assembly jig according to claim 10, characterized in that: It also includes an end cover, which is locked on an end of the cylinder away from the rotor assembly mounting flange through an end cover locking bolt.

12. The elevator disc traction machine rotor disassembly and assembly jig according to claim 11, characterized in that: A lifting ring is locked on the end cover.

Images