Key disassembling assembly, key disassembling method and separation method of transmission part and shaft

Abstract

The invention relates to the technical field of machining, and provides a key disassembling assembly, a key disassembling method and a method for separating a transmission part from a shaft. The key disassembling assembly comprises a first threaded rod, a second threaded rod and a key disassembling plate; the key is assembled in a key groove formed between the transmission part and the shaft, second inner threaded holes and first inner threaded holes are formed in the outer end face of the transmission part and the outer end face of the key respectively, and second key disassembling plate through holes corresponding to the second inner threaded holes in a one-to-one mode and first key disassembling plate through holes corresponding to the first inner threaded holes are formed in the key disassembling plate. The key can be detached from the key groove through the two threaded rods and the key detaching plate, special tools and auxiliary equipment are not needed, and the key detaching device is suitable for detaching the key under different working conditions and is simple in structure, convenient to install and high in portability.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, and in particular to a key removal assembly, a key removal method, and a method for separating a transmission member from a shaft. Background Art

[0002] A key is a key in mechanical transmission, which is mainly used for circumferential fixation between the shaft and the parts on the shaft to transmit torque. Flat keys are often installed between the shaft and the gear to bear unidirectional axial force. After running for a period of time, the key may become embedded in the shaft and the gear, making it difficult to disassemble the shaft and the gear.

[0003] In the prior art, when disassembling the shaft and the teeth, the key is generally not handled separately. The tooling is used to directly pull the external teeth, and the external teeth are heated and assisted by thermal expansion. The flat key is installed between the shaft and the teeth. If it is subjected to a unidirectional axial force for a long time, after a period of operation, the key may be embedded in the shaft and the teeth. It is difficult to pull out the key by forcibly pulling the external teeth, and even damage the matching surface between the shaft and the external teeth. There are also some designs in the prior art for the above problems. For example, the patent document CN211362099U discloses a disassembly tool for the spline sleeve of the drum wheel shaft of a cigarette loading machine, including: a sleeve part and a traction part. The sleeve part is provided with a spline sleeve matching hole, and the sleeve part is sleeved on the outer periphery of the spline sleeve through the matching hole, so that the matching hole is tightly meshed with the key surface and key of the spline sleeve. The traction part includes: a claw and a top column, the claw is clamped on the outer periphery of the sleeve part, and the top column abuts against the end of the spline shaft matched with the spline sleeve. When removing the spline sleeve, the movement of the top column is adjusted so that the traction part drives the sleeve part to move away from the spline shaft to remove the spline sleeve. However, this design directly pulls the external teeth through the tooling, which has the risk of damaging the mating surface between the shaft and the external teeth, and needs further improvement. Summary of the invention

[0004] In view of the defects in the prior art, an object of the present invention is to provide a key removal assembly, a key removal method, and a method for separating a transmission member from a shaft.

[0005] A key removal assembly provided according to the present invention comprises a first threaded rod, a second threaded rod and a key removal plate;

[0006] The key is assembled in the keyway formed between the transmission member and the shaft, a plurality of second internal threaded holes are processed on the outer end surface of the transmission member, a first internal threaded hole is processed on the outer end surface of the key, and the plurality of second internal threaded holes are arranged along the circumference of the first internal threaded hole;

[0007] The key removal plate is provided with second key removal plate through holes corresponding to the plurality of second internal threaded holes one by one and a first key removal plate through hole corresponding to the first internal threaded hole. A first nut is arranged on the first key removal plate through hole, and a second nut is arranged on the second key removal plate through hole. The key removal plate can be fixed on the transmission member by sequentially passing a plurality of second threaded rods through the second nut and the second internal threaded hole. At this time, after assembling the first threaded rod on the first nut and the first internal threaded hole and screwing the first threaded rod, the key can be pulled out of the key groove.

[0008] Preferably, the first threaded rod includes a front spiral section, a middle spiral section, and a rear operating end;

[0009] The thread in the front spiral section is a right-handed thread, the thread in the middle spiral section is a left-handed thread. The front spiral section on the first threaded rod matches the first internal threaded hole, and the middle spiral section on the first threaded rod matches the first nut; the rear operating end is used for a tool to hold the first threaded rod so as to operate the first threaded rod to rotate.

[0010] A key removal method provided by the present invention includes the following steps:

[0011] S1: Process a first internal threaded hole on the key end face, and process a plurality of second internal threaded holes arranged circumferentially along the first internal threaded hole on the transmission member end face;

[0012] S2: Make a key removal plate, and process 1 first key removal plate through hole (41) on the key removal plate, and process a plurality of second key removal plate through holes;

[0013] S3: Fix a first nut on the first key removal plate through hole of the key removal plate, and fix a second nut on the second key removal plate through hole of the key removal plate;

[0014] S4: Prepare 1 first threaded rod and a plurality of second threaded rods. Screw the rear end side of the middle spiral section on the first threaded rod into the first nut and pass through the first key removal plate through hole. Screw the plurality of second threaded rods into the second nut and pass through the second key removal plate through hole. Place the key removal plate parallel to the end faces of the shaft and the transmission member, and adjust the position of the key removal plate so that the second key removal plate through hole is coaxially arranged with the second internal threaded hole, and the first key removal plate through hole is coaxially arranged with the first internal threaded hole. At this time, screw the front end part of the front spiral section on the first threaded rod into the first internal threaded hole, and screw the ends of the plurality of second threaded rods into the second internal threaded hole. The plurality of second threaded rods fix the key removal plate on the transmission member;

[0015] S: Then, turn the first threaded rod clockwise. Under the cooperation of the first nut and the middle spiral area, the whole first threaded rod is driven to move away from the transmission part. At the same time, the front spiral area also screws into the first internal threaded hole, driving the key to move out of the keyway as a whole. Thus, the action of pulling out the key from the keyway is achieved by turning the first threaded rod.

[0016] Preferably, the outer diameter and pitch of the middle spiral area and the front spiral area are the same.

[0017] Preferably, the outer diameter and pitch of the middle spiral area are both larger than those of the front spiral area.

[0018] Preferably, the number of the second internal threaded holes is 4, and the 4 second internal threaded holes are evenly arranged along the circumferential direction of the first internal threaded hole.

[0019] Preferably, the inner diameter of the second key-removing plate through-hole is larger than that of the second internal threaded hole, and the inner diameter of the first key-removing plate through-hole is larger than that of the first internal threaded hole. The internal threaded hole is machined by tapping with a tap.

[0020] Preferably, the key-removing plate is circular, square or oval.

[0021] Preferably, it further includes an intermediate frame. The intermediate frame includes a screw end and a support frame. The inner end of the screw end is in threaded cooperation with the first internal threaded hole. The outer end of the screw end is fixed to one side of the support frame. There is a support frame internal threaded hole on the other side of the support frame. When performing the key-removing action, first screw the screw end into the first internal threaded hole to fix the intermediate frame, and then screw the front spiral area of the first threaded rod into the support frame internal threaded hole. When the first threaded rod is rotated, the key is driven to move by driving the intermediate frame, so that the key is disengaged from the keyway.

[0022] According to a method for separating a transmission part from a shaft provided by the present invention, first remove the key between the transmission part and the shaft, and then heat the transmission part and remove the transmission part by pulling.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention can remove the key from the keyway by using two threaded rods and a key-removing plate. The whole assembly has no complex structure and can be easily completed by turning the screw rod. There is no need for special tools and auxiliary equipment, which is suitable for the disassembly of keys under different working conditions. It has a simple structure, is easy to install, and has strong portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more obvious:

[0026] Figure 1 Schematic diagram of the structural arrangement of the key between the shaft and the transmission member in the present invention;

[0027] Figure 2 Schematic diagram of the structure of the key removal plate;

[0028] Figure 3 Schematic diagram of the structure of the first threaded rod in Embodiment 1;

[0029] Figure 4 Schematic diagram of the structure of the first threaded rod in Embodiment 3;

[0030] Figure 5 Schematic diagram of the structure of the intermediate frame;

[0031] Figure 6 Schematic diagram of the action principle of the key being removed in Embodiment 2.

[0032] As shown in the figure:

[0033] Key 1

[0034] First internal threaded hole 11

[0035] Transmission member 2

[0036] Second internal threaded hole 21

[0037] Shaft 3

[0038] Key removal plate 4

[0039] First key removal plate through hole 41

[0040] Second key removal plate through hole 42

[0041] First threaded rod 5

[0042] Front spiral region 51

[0043] Middle spiral region 52

[0044] Rear operating end 53

[0045] Intermediate frame 6

[0046] Screw end 61

[0047] Support frame 62

[0048] Support frame internal threaded hole 621 Detailed implementation manners

[0049] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0050] Embodiment 1:

[0051] In order to solve the problem that when removing the transmission member 2 when the key 1 is embedded between the shaft 3 and the transmission member 2, it is easy to damage the mating surface of the shaft 3 and the transmission member 2, the present invention provides a method for separating the transmission member from the shaft. First, remove the key 1 between the transmission member 2 and the shaft 3, and then heat the transmission member 2 and remove the transmission member 2 by pulling. By adopting the method of first removing the key 1 and then removing the transmission member 2, the problem that the mating surface of the shaft 3 and the transmission member 2 is easily damaged is greatly reduced.

[0052] In order to remove the key 1 first, the present invention provides a key removal assembly, as Figure 1 , Figure 2 , Figure 3 shown, including a first threaded rod 5, a second threaded rod and a key removal plate 4. The transmission member 2 is assembled on the shaft 3, a keyway is formed between the transmission member 2 and the shaft 3, and the key 1 is assembled in the keyway; the key 1 is preferably a flat key, and the transmission member 2 is a transmission structure assembled on the shaft 3, such as a gear, a pulley, a coupling, a transmission sleeve, etc.

[0053] As Figure 1 shown, 4 second internal threaded holes 21 are machined on the outer end surface of the transmission member 2, and 1 first internal threaded hole 11 is machined on the outer end surface of the key 1. The 4 second internal threaded holes 21 are arranged circumferentially along the first internal threaded hole 11, and preferably the 4 second internal threaded holes 21 are evenly arranged circumferentially along the first internal threaded hole 11.

[0054] Furthermore, the key removal plate 4 can adopt various shapes, such as circular, square, oval, etc., and is preferably a rectangular structure. As Figure 2 shown, the key removal plate 4 has 4 second key removal plate through holes 42 corresponding to the second internal threaded holes 21 one by one and a first key removal plate through hole 41 corresponding to the first internal threaded hole 11. A first nut and a second nut are respectively arranged on each first key removal plate through hole 41 and second key removal plate through hole 42. By sequentially passing a plurality of second threaded rods through the second nuts and the second internal threaded holes 21, the key removal plate 4 can be fixed on the transmission member 2. At this time, by assembling the first threaded rod 5 on the first nut and the first internal threaded hole 11 and then screwing the first threaded rod 5, the key 1 can be pulled out of the keyway.

[0055] Specifically, four second threaded rods respectively penetrate through one second nut and one second internal threaded hole 21. It is equivalent that one end of the second threaded rod is fixed on the second internal threaded hole 21, and the other end is fixed on the through hole 42 of the second key-removing plate. The four second threaded rods fix the key-removing plate 4 on the transmission member 2 in a way supported by four parts.

[0056] As Figure 3 shown, the first threaded rod 5 includes a front helical section 51, a middle helical section 52, and a rear operating end 53. Among them, the thread in the front helical section 51 is a right-handed thread, and the right-handed thread matches the first internal threaded hole 11. The thread in the middle helical section 52 is a left-handed thread, and the left-handed thread matches the first nut. The rear operating end 53 is used for tool clamping. The cross-section of the rear operating end 53 is preferably a regular polygon, such as a square, and the first threaded rod 5 can be rotated by clamping it with a wrench, which is convenient for operating the rotation of the first threaded rod 5.

[0057] Specifically, the front helical section 51 on the first threaded rod 5 matches the first internal threaded hole 11, and the middle helical section 52 on the first threaded rod 5 matches the first nut. Therefore, when the position of the key-removing plate 4 is fixed relative to the position of the transmission member 2, when the first threaded rod 5 is rotated clockwise, the rotation of the left-handed thread in the first nut can make the first threaded rod 5 move away from the transmission member 2. At the same time, the rotation of the right-handed thread in the first internal threaded hole 11 can drive the key 1 to move out of the keyway. In this embodiment, it is preferred that the outer diameter and pitch of the middle helical section 52 and the front helical section 51 are the same, and the external thread of the second threaded rod matches the internal threads of the second internal threaded hole 21 and the second nut.

[0058] Specifically, the inner diameter of the through hole 42 of the second key-removing plate is larger than the inner diameter of the second internal threaded hole 21, and the inner diameter of the through hole 41 of the first key-removing plate is larger than the inner diameter of the first internal threaded hole 11, which is convenient for the first threaded rod 5 and the second threaded rod to penetrate through the corresponding through holes. The internal threaded hole is preferably processed by tapping with a tap drill.

[0059] The present invention also provides a key-removing method, which is carried out by using a key-removing component and includes the following steps:

[0060] S1: Process a first internal threaded hole 11 on the end face of the key 1, and process a plurality of second internal threaded holes 21 arranged circumferentially along the first internal threaded hole 11 on the end face of the transmission member 2;

[0061] S2: Manufacture a key-removing plate 4, process one through hole 41 of the first key-removing plate on the key-removing plate 4, and process a plurality of through holes 42 of the second key-removing plate;

[0062] S3: Fix a first nut on the through hole 41 of the first key-removing plate on the key-removing plate 4, and fix a second nut on the through hole 42 of the second key-removing plate on the key-removing plate 4. The first nut and the second nut are preferably fixed by welding;

[0063] S4: Prepare one first threaded rod 5 and multiple second threaded rods. The number of the second threaded rods is preferably 4. Screw the rear end side of the middle spiral area 52 on the first threaded rod 5 into the first nut and penetrate through the first key-removing plate through-hole 41. Screw the multiple second threaded rods into the second nut and penetrate through the second key-removing plate through-hole 42. Place the key-removing plate 4 parallel to the end faces of the shaft 3 and the transmission part 2. Adjust the position of the key-removing plate 4 so that the second key-removing plate through-hole 42 and the second internal thread hole 21 are coaxially arranged, and the first key-removing plate through-hole 41 and the first internal thread hole 11 are coaxially arranged. At this time, screw a part of the front end of the front spiral area 51 on the first threaded rod 5 into the first internal thread hole 11, and screw the ends of the multiple second threaded rods into the second internal thread hole 21. The multiple second threaded rods fix the key-removing plate 4 on the transmission part 2;

[0064] S5: Then, clockwise screw the first threaded rod 5. Under the cooperation of the first nut and the middle spiral area 52, drive the whole first threaded rod 5 to move in a direction away from the transmission part 2. At the same time, the front spiral area 51 also screws into the first internal thread hole 11 at the same time, thereby driving the whole key 1 to move out of the keyway, so as to realize the action of pulling out the key 1 from the keyway by screwing the first threaded rod 5.

[0065] Embodiment 2:

[0066] The difference between this embodiment and Embodiment 1 is that the key-removing assembly further includes an intermediate frame 6. As shown in Figure 5 , the intermediate frame 6 includes a screw end 61 and a support frame 62. The inner end of the screw end 61 is in threaded cooperation with the first internal thread hole 11. The outer end of the screw end 61 is fixed to one side of the support frame 62. The other side of the support frame 62 is provided with a support frame internal thread hole 621. When performing the key-removing action, first screw the screw end 61 into the first internal thread hole 11 to fix the intermediate frame 6, and then screw the front spiral area 51 of the first threaded rod 5 into the support frame internal thread hole 621. When the first threaded rod 5 is rotated, drive the key 1 to move through the intermediate frame 6 so that the key 1 is disengaged from the keyway.

[0067] This embodiment also provides a key-removing method, which is carried out by using a key-removing component and includes the following steps:

[0068] S1: Machine a first internal thread hole 11 on the end face of the key 1, and machine a plurality of second internal thread holes 21 arranged circumferentially along the first internal thread hole 11 on the end face of the transmission part 2;

[0069] S2: Manufacture a key-removing plate 4, machine one first key-removing plate through-hole 41 on the key-removing plate 4, and machine a plurality of second key-removing plate through-holes 42;

[0070] ​​S3: fixing a first nut on the first key removal plate through hole 41 of the key removal plate 4, and fixing a second nut on the second key removal plate through hole 42 of the key removal plate 4;

[0071] S4: prepare a first threaded rod 5 and a plurality of second threaded rods, the number of the second threaded rods is preferably 4, the rear end side of the middle spiral zone 52 on the first threaded rod 5 is screwed into the first nut and passed through the first key removal plate through hole 41, the plurality of second threaded rods are screwed into the second nut and passed through the second key removal plate through hole 42, the screw end 61 of the intermediate frame 6 is screwed into the first internal threaded hole 11, the demolition plate 4 is placed parallel to the end surface of the shaft 3 and the transmission member 2, the position of the key removal plate 4 is adjusted so that the second key removal plate through hole 42 is coaxially arranged with the second internal threaded hole 21, and the first key removal plate through hole 41 is coaxially arranged with the first internal threaded hole 11, at this time, the front end part of the front spiral zone 51 on the first threaded rod 5 is screwed into the internal threaded hole 621 of the support frame, and the ends of the plurality of second threaded rods are screwed into the second internal threaded hole 21, and the plurality of second threaded rods fix the demolition plate 4 on the transmission member 2;

[0072] S5: Then, the first threaded rod 5 is screwed clockwise, and with the cooperation of the first nut and the middle spiral area 52, the first threaded rod 5 is driven to move as a whole in the direction away from the transmission member 2. At the same time, the front spiral area 51 is also screwed into the inner threaded hole 621 of the support frame, and then the key 1 is driven to move out of the keyway as a whole through the intermediate frame 6, so as to realize the action of pulling the key 1 out of the keyway by screwing the first threaded rod 5.

[0073] Embodiment 3:

[0074] The difference between this embodiment and embodiment 1 is that the outer diameter and pitch of the middle spiral region 52 are larger than those of the front spiral region 51. Figure 4 As shown, this arrangement enables the key 1 to be quickly pulled out of the keyway during the rotational cooperation between the middle spiral zone 52 and the first nut.

[0075] Taking Example 1 as an example, the transmission member 2 is a gear, and the operating principle of removing the key 1 and the gear 2 of the present invention is as follows:

[0076] The general idea is to first remove key 1, then heat the gear, and remove the gear by pulling. The specific operations are as follows:

[0077] First, a first internal threaded hole 11 is formed by drilling and tapping on the end face of the key 1, and four second internal threaded holes 21 are formed by drilling and tapping on the end face of the gear. The four second internal threaded holes 21 are arranged circumferentially around the key 1. A key removal plate 4, a first threaded rod 5, and four second threaded rods are prepared.

[0078] Secondly, make a square key removal plate 4. Drill 1 first key removal plate through hole 41 and 4 second key removal plate through holes 42 on the key removal plate 4. Spot weld a first nut with the same internal thread as the first internal thread hole 11 on the first key removal plate through hole 41 of the key removal plate 4, and spot weld a second nut with the same internal thread as the second internal thread hole 21 on the second key removal plate through hole 42 of the key removal plate 4. The first key removal plate through hole 41 and the first nut are coaxially arranged, and the second key removal plate through hole 42 and the second nut are coaxially arranged.

[0079] Thirdly, prepare 1 first threaded rod 5 and 4 second threaded rods. Screw the rear side of the middle spiral area 52 on the first threaded rod 5 into the first nut. Place the key removal plate 4 parallel to the end faces of the shaft 3, the key 1, and the gear. Adjust the position of the key removal plate 4 so that the second key removal plate through hole 42 is coaxially arranged with the second internal thread hole 21, and the first key removal plate through hole 41 is coaxially arranged with the first internal thread hole 11. At this time, screw the front part of the front spiral area 51 on the first threaded rod 5 into the first internal thread hole 11, and first screw the prepared 4 second threaded rods onto the second key removal plate through hole 42 and then continue to screw until the ends are screwed into the second internal thread hole 21. The 4 second threaded rods fix the key removal plate 4 on the gear. Then, clockwise screw the first threaded rod 5. Under the cooperation of the first nut and the middle spiral area 52, drive the first threaded rod 5 to move in the direction away from the gear as a whole. At the same time, the front spiral area 51 also screws into the first internal thread hole 11 at the same time, thereby driving the key 1 to move out of the keyway as a whole. That is to say, for every one turn of the first threaded rod 5, the key 1 can be driven to move away from the keyway by a distance of 2 pitches. By screwing the first threaded rod 5, the action of slowly pulling out the key 1 from the keyway can be realized.

[0080] Finally, heat the gear again, and remove the gear from the shaft 3 by means of a three-jaw puller in a pulling manner.

[0081] It has been proved by practice that after the key 1 is disassembled first, the disassembly difficulty of the shaft 3 and the gear can be effectively reduced, and the surface damage of the parts can be avoided, and it can be widely promoted and applied.

[0082] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0083] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A key removal assembly, characterized in that: It comprises a first threaded rod (5), a second threaded rod and a key removal plate (4); The key (1) is assembled in a keyway formed between the transmission member (2) and the shaft (3); a plurality of second internal threaded holes (21) are machined on the outer end surface of the transmission member (2); a first internal threaded hole (11) is machined on the outer end surface of the key (1); and the plurality of second internal threaded holes (21) are arranged along the circumference of the first internal threaded hole (11); The key-removing plate (4) has second key-removing plate through holes (42) corresponding to the plurality of second internal threaded holes (21) one by one, and first key-removing plate through holes (41) corresponding to the first internal threaded holes (11); the first key-removing plate through holes (41) are provided with first nuts, and the second key-removing plate through holes (42) are provided with second nuts; the key-removing plate (4) can be fixed to the transmission member (2) by passing through the second nuts and the second internal threaded holes (21) in sequence through the plurality of second threaded rods; at this time, the key (1) can be pulled out of the keyway by assembling the first threaded rod (5) on the first nut and the first internal threaded hole (11) and then screwing the first threaded rod (5).

2. The key removal assembly according to claim 1, characterized in that: The first threaded rod (5) comprises a front spiral region (51), a middle spiral region (52) and a rear operating end (53); The thread in the front spiral zone (51) is a right-hand thread, and the thread in the middle spiral zone (52) is a left-hand thread. The front spiral zone (51) on the first threaded rod (5) matches the first internal threaded hole (11), and the middle spiral zone (52) on the first threaded rod (5) matches the first nut. The rear operating end (53) is used for clamping the first threaded rod (5) with a tool so as to operate the first threaded rod (5) to rotate.

3. A key removal method, characterized in that: The steps include: S1: machining a first internal threaded hole (11) on the end face of the key (1), and machining a plurality of second internal threaded holes (21) arranged along the circumference of the first internal threaded hole (11) on the end face of the transmission member (2); S2: manufacturing a key removal plate (4), processing a first key removal plate through hole (41) and processing a plurality of second key removal plate through holes (42) on the key removal plate (4); S3: fixing a first nut on a first key-removing plate through hole (41) of the key-removing plate (4), and fixing a second nut on a second key-removing plate through hole (42) of the key-removing plate (4); S4: prepare a first threaded rod (5) and a plurality of second threaded rods, screw the rear end side of the middle spiral zone (52) on the first threaded rod (5) into the first nut and pass through the first key removal plate through hole (41), screw the plurality of second threaded rods into the second nut and pass through the second key removal plate through hole (42), place the demolition plate (4) parallel to the end faces of the shaft (3) and the transmission member (2), adjust the position of the key removal plate (4) so ​​that the second key removal plate through hole (42) and the second internal threaded hole (21) are coaxially arranged, and the first key removal plate through hole (41) and the first internal threaded hole (11) are coaxially arranged, then screw the front end portion of the front spiral zone (51) on the first threaded rod (5) into the first internal threaded hole (11), and screw the ends of the plurality of second threaded rods into the second internal threaded hole (21), and the plurality of second threaded rods fix the demolition plate (4) on the transmission member (2); S5: Then, the first threaded rod (5) is screwed clockwise, and the first threaded rod (5) is driven as a whole to move in a direction away from the transmission member (2) under the cooperation of the first nut and the middle spiral zone (52). At the same time, the front spiral zone (51) is also screwed into the first internal threaded hole (11) to drive the key (1) as a whole to move out of the keyway, thereby realizing the action of pulling the key (1) out of the keyway by screwing the first threaded rod (5).

4. The key removal assembly according to claim 2 or the method according to claim 3, characterized in that: The outer diameter and pitch of the middle helical zone (52) are the same as those of the front helical zone (51).

5. The key removal assembly according to claim 2 or the method according to claim 3, characterized in that: The outer diameter and pitch of the middle helical zone (52) are both greater than those of the front helical zone (51).

6. The key removal assembly according to claim 1 or the method according to claim 3, characterized in that: The number of the second internal threaded holes (21) is four, and the four second internal threaded holes (21) are evenly arranged along the circumference of the first internal threaded hole (11).

7. The key removal assembly according to claim 1 or the method according to claim 3, characterized in that: The inner diameter of the second key-removing plate through hole (42) is larger than the inner diameter of the second internal threaded hole (21), and the inner diameter of the first key-removing plate through hole (41) is larger than the inner diameter of the first internal threaded hole (11). The internal threaded hole is formed by drilling and tapping.

8. The key removal assembly according to claim 1 or the method according to claim 3, characterized in that: The key removal plate (4) is circular, square or oval in shape.

9. The key removal assembly according to claim 2 or the method according to claim 3, characterized in that: The intermediate frame (6) is also included, and the intermediate frame (6) includes a screw rod end (61) and a support frame (62). The inner end of the screw rod end (61) is threadedly matched with the first internal threaded hole (11), and the outer end of the screw rod end (61) is fixed to one side of the support frame (62). The other side of the support frame (62) is provided with a support frame internal threaded hole (621). When the key is removed, the screw rod end (61) is first screwed into the first internal threaded hole (11) to fix the intermediate frame (6), and then the front spiral area (51) of the first threaded rod (5) is screwed into the support frame internal threaded hole (621). When the first threaded rod (5) is rotated, the key (1) is driven to move by driving the intermediate frame (6) so that the key (1) is disengaged from the key slot.

10. A method for separating a transmission member from a shaft, characterized in that: First, the key (1) between the transmission member (2) and the shaft (3) is removed, and then the transmission member (2) is heated and removed by pulling.

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