A rotating shaft connecting member and a transmission mechanism of a metal cutting device

Abstract

The present invention discloses a shaft connecting member and a transmission mechanism of a metal cutting device, relating to the technical field of coupling transmission. Among them, a transmission mechanism includes a half transmission sleeve and an input shaft. An axial sheath is arranged inside one end of the half transmission sleeve. The axial sheath is axially slidably and cooperatively connected with the half transmission sleeve. An output shaft is arranged at one end of the axial sheath away from the input shaft. The output shaft is radially elastically and cooperatively connected with the axial sheath. The half transmission sleeve and the input shaft are assembled and connected through a connecting member. During the transmission process of the present invention, through the axial sliding cooperation between the axial sheath and the half transmission sleeve, it is convenient to protect the output shaft axially during output. And through the radial elastic cooperation between the output shaft and the axial sheath, it is convenient to elastically protect the output shaft radially during output.

Description

Technical Field

[0001] The present invention relates to the technical field of coupling transmission, and specifically to a shaft connecting member and a transmission mechanism of a metal cutting device. Background Art

[0002] A coupling refers to a device that connects two shafts or a shaft and a rotating part, rotates together during the transmission of motion and power, and does not disengage under normal circumstances. A coupling is a commonly used transmission structure for shaft-to-shaft, and can also be used as a safety device to prevent the connected machine parts from bearing excessive loads, playing a role in overload protection.

[0003] Chinese Patent Publication No.: CN105422652A, provides a coupling that is easy to disassemble, including a left half coupling, a right half coupling, fixing bolts, a left shaft sleeve, and a right shaft sleeve; the left half coupling and the right half coupling are connected and fixed by fixing bolts; the input shaft is connected to the left half coupling through the left shaft sleeve, and the output shaft is connected to the right half coupling through the right shaft sleeve; pin through holes are provided on the left shaft sleeve, the left half coupling, the right half coupling, and the right shaft sleeve, and fixing pins are provided in the pin through holes.

[0004] In this solution, during rotational transmission, the output mode at the output end is single. If applied to the shaft transmission of cutting, when the cutting force and the cutting material do not match, it is very easy to have problems such as poor cutting effect or over-cutting. For the cutting of metals, especially in the processing of boring or chamfering, the output shaft also needs to be compensated to a certain extent.

[0005] Therefore, it is necessary to provide a shaft connecting member and a transmission mechanism of a metal cutting device. Summary of the Invention

[0006] The purpose of the present invention is to provide a shaft connecting member and a transmission mechanism of a metal cutting device to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A transmission mechanism includes a semi-transmission sleeve and an input shaft. An axial sheath is arranged inside one end of the semi-transmission sleeve. The axial sheath is axially slidably and cooperatively connected with the semi-transmission sleeve. An output shaft is arranged at one end of the axial sheath away from the input shaft. The output shaft is radially elastically and cooperatively connected with the axial sheath. The semi-transmission sleeve and the input shaft are assembled and connected through a connecting member.

[0009] As a further solution of the present invention: first connection flanges and second connection flanges are symmetrically sleeved and arranged around the opposite end parts of the semi-transmission sleeve and the input shaft respectively. First connection holes and third connection holes are respectively and correspondingly penetrated through the first connection flanges and the second connection flanges.

[0010] As a further solution of the present invention: The connecting member is composed of a bolt and a nut in cooperation.

[0011] As a further solution of the present invention: A sliding cavity is embedded at one end of the semi-driving sleeve, and a first through hole communicating with the sliding cavity is provided through the other end of the semi-driving sleeve. The axial sheath is located in the sliding cavity, and the outer periphery of the axial sheath is slidably adapted to the inner wall of the sliding cavity. The inner wall of the sliding cavity is embedded with first sliding grooves in an annular array, and the first sliding grooves extend along the axial direction of the semi-driving sleeve. A convex rib slidably adapted to the first sliding groove is provided on the outer periphery of the axial sheath, and a first spring is connected between the convex rib and the first sliding groove.

[0012] As a further solution of the present invention: An opening is embedded at one end of the axial sheath facing the opening of the sliding cavity, and the end of the output shaft extends into the opening. Radial adjustment grooves are symmetrically embedded on both sides in the opening, and radial adjustment ribs slidably adapted to the radial adjustment grooves are symmetrically provided on the outer periphery of the end of the output shaft. A second spring is connected between the radial adjustment rib and the radial adjustment groove. The radial adjustment rib extends along the axial direction of the output shaft, the diameter of the output shaft is smaller than the inner diameter of the opening, and a flexible ring is embedded on the inner wall of the opening. The flexible ring is movably fitted and sleeved on the outer periphery of the output shaft.

[0013] As a further solution of the present invention: A convex platform is provided at the center of one end of the axial sheath facing the first through hole, and the convex platform is adapted to the size of the first through hole. Limiting grooves are symmetrically embedded on both sides of the convex platform, and limiting components corresponding and adapted to the limiting grooves are symmetrically embedded on both sides in the first through hole. Two groups of second blind holes communicating with the limiting components are embedded at the periphery of the end of the semi-driving sleeve located outside the first through hole, and multiple groups of third blind holes are also embedded at the periphery of the end of the semi-driving sleeve located outside the first through hole. The multiple groups of third blind holes and the second blind holes are distributed in an annular array around the first through hole, and the second blind holes and the third blind holes are correspondingly arranged with the first connecting holes.

[0014] As a further solution of the present invention: The limiting component includes a first blind hole embedded in the semi-driving sleeve and opening towards the first through hole. A limiting block is connected in the first blind hole through a third spring, and the limiting block is opposite to the convex platform and is adapted to the size.

[0015] As a further solution of the present invention: A limiting hole is embedded at the center of the end of the output shaft extending into the opening, a stepped hole is provided through the center of the convex platform, a transmission rod with a corresponding end and adapted to the size of the limiting hole is slidably fitted in the stepped hole, and the end of the transmission rod away from the limiting hole is connected to the inside of the stepped hole through a fourth spring. The fourth spring acts on the end of the transmission rod to move away from the limiting hole.

[0016] As a further solution of the present invention: a gasket is disposed between the semi-driving sleeve and the input shaft in a fitting manner. A plurality of groups of second connection holes corresponding to and having a size adapted to the first connection holes and the third connection holes are disposed through the gasket in an annular array. Second through holes are symmetrically disposed through the gasket, and piston rods are slidably fitted in the second through holes.

[0017] As a further solution of the present invention: the second through hole is a through hole with a dumbbell-shaped cross section. Both ends of the piston rod are provided with pistons. The middle part of the piston rod is slidably fitted with the middle part of the second through hole, and the pistons at both ends of the piston rod are adapted to the sizes of both ends of the second through hole.

[0018] As a further solution of the present invention: a convex block is fixedly disposed at the center of the gasket. The convex block is correspondingly disposed with the transmission rod. A fourth blind hole having a size matching that of the convex block is embedded at the center of the relative position between the input shaft and the semi-driving sleeve.

[0019] A rotating shaft connecting member of a metal cutting device includes the above-described transmission mechanism.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: during the transmission process, through the axial sliding fit between the axial sheath and the semi-driving sleeve, it is convenient to protect the output shaft axially during output. And through the elastic fit between the output shaft and the axial sheath in the radial direction, it is convenient to elastically protect the output shaft in the radial direction during output. This elastic movement protection in the radial and axial directions can also improve the actual cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the transmission mechanism.

[0022] Figure 2 It is a schematic cross-sectional structural diagram of the transmission mechanism.

[0023] Figure 3 It is a front side view of the axial sheath in the transmission mechanism.

[0024] Figure 4 It is a rear side view of the axial sheath in the transmission mechanism.

[0025] Figure 5 It is a schematic structural diagram of the input shaft in the transmission mechanism.

[0026] Figure 6 It is a front side view of the output shaft in the transmission mechanism.

[0027] Figure 7 It is a rear side view of the output shaft in the transmission mechanism.

[0028] Figure 8 For Figure 2 right view.

[0029] Figure 9 is Figure 2 The enlarged structural schematic diagram of area A in

[0030] Figure 10 The structural schematic diagram of the gasket in the transmission mechanism.

[0031] Figure 11 is Figure 10 The left view of

[0032] Figure 12 is Figure 10 The enlarged structural schematic diagram of area B in

[0033] In the figure: 1 - semi - transmission sleeve, 11 - sliding cavity, 12 - first through - hole, 13 - first connecting flange, 14 - first connecting hole, 15 - first chute, 16 - limiting component, 1601 - first blind - hole, 1602 - limiting block, 17 - second blind - hole, 18 - third blind - hole, 2 - gasket, 21 - second connecting hole, 22 - convex block, 23 - second through - hole, 24 - piston rod, 3 - input shaft, 31 - second connecting flange, 32 - third connecting hole, 33 - fourth blind - hole, 4 - axial sheath, 41 - opening, 42 - flexible ring, 43 - radial adjustment groove, 44 - convex platform, 45 - stepped hole, 46 - transmission rod, 47 - limiting groove, 48 - convex rib, 5 - output shaft, 51 - radial adjustment rib, 52 - limiting hole, 6 - connecting piece. Specific embodiments

[0034] Please refer to Figures 1-3 , in the embodiment of the present invention, a transmission mechanism includes a semi - transmission sleeve 1 and an input shaft 3. An axial sheath 4 is arranged inside one end of the semi - transmission sleeve 1. The axial sheath 4 is axially slidably and cooperatively connected with the semi - transmission sleeve 1. An output shaft 5 is arranged at one end of the axial sheath 4 away from the input shaft 3. The output shaft 5 and the axial sheath 4 are radially elastically cooperatively connected. The semi - transmission sleeve 1 and the input shaft 3 are assembled and connected through a connecting piece 6. Among them, first connecting flanges 13 and second connecting flanges 31 are symmetrically sleeved and arranged around the opposite end parts of the semi - transmission sleeve 1 and the input shaft 3 respectively. First connecting holes 14 and third connecting holes 32 are respectively and correspondingly penetrated through the first connecting flange 13 and the second connecting flange 31. After the connecting piece 6 passes through the first connecting hole 14 and the third connecting hole 32, the semi - transmission sleeve 1 and the input shaft 3 are connected and fixed, so as to keep the axes of the two coincident and facilitate the completion of transmission. During the transmission process, through the axial sliding cooperation between the axial sheath 4 and the semi - transmission sleeve 1, it is convenient to protect the output shaft 5 axially during output. And through the radial elastic cooperation between the output shaft 5 and the axial sheath 4, it is convenient to elastically protect the output shaft 5 radially during output.

[0035] Preferably, the connecting member 6 is composed of a bolt and a nut. After the bolt passes through the first connecting hole 14 and the third connecting hole 32, the cooperation of the bolt and the nut can be used to lock the half transmission sleeve 1 and the input shaft 3.

[0036] As Figures 2-4 shown, a sliding cavity 11 is embedded at one end of the half transmission sleeve 1, and a first through hole 12 communicating with the sliding cavity 11 is provided through the other end of the half transmission sleeve 1. The axial sheath 4 is located in the sliding cavity 11, and the outer periphery of the axial sheath 4 is slidably adapted to the inner wall of the sliding cavity 11. The inner wall of the sliding cavity 11 is embedded with first sliding grooves 15 in an annular array. The first sliding grooves 15 extend along the axial direction of the half transmission sleeve 1. A convex rib 48 slidably adapted to the first sliding groove 15 is provided on the outer periphery of the axial sheath 4. A first spring is connected between the convex rib 48 and the first sliding groove 15. In this way, when the input shaft 3 drives the half transmission sleeve 1 to rotate, under high-speed centrifugal rotation, the axial sheath 4 can form an axial relative movement with the half transmission sleeve 1 through the sliding cooperation of the convex rib 48 and the first sliding groove 15. Through the action of the first spring, the movement amplitude can be kept small, and it can be used as an axial protection when the whole device is used for cutting. An opening 41 is embedded at one end of the axial sheath 4 facing the opening of the sliding cavity 11. The end of the output shaft 5 extends into the opening 41. Radial adjustment grooves 43 are symmetrically embedded on both sides in the opening 41. Radial adjustment ribs 51 slidably adapted to the radial adjustment grooves 43 are symmetrically provided on the outer periphery of the end of the output shaft 5. The radial adjustment ribs 51 and the radial adjustment grooves 43 are connected by a second spring. The radial adjustment ribs 51 are arranged along the axial direction of the output shaft 5, and can be integrally arranged or fixedly connected to the outer periphery of the output shaft 5 by welding. The diameter of the output shaft 5 is smaller than the inner diameter of the opening 41, and there is a gap between the outer periphery of the output shaft 5 and the inner wall of the opening 41. By using the gap between the output shaft 5 and the inner wall of the opening 41 and the elastic cooperation between the radial adjustment ribs 51 and the radial adjustment grooves 43, not only can the half transmission sleeve 1 drive the axial sheath 4 to rotate and stably drive the output shaft 5 to rotate circumferentially, but also protection can be provided in the radial direction during rotation, and it can be used during boring. A flexible ring 42 is embedded on the inner wall of the opening of the opening 41. The flexible ring 42 is movably fitted around the outer periphery of the output shaft 5. Preferably, the flexible ring 42 can be an airbag or a flexible silica gel ring. In this way, during the normal use of the output shaft 5, dust is not easily introduced into the opening 41, and at the same time, a buffering effect can also be provided when the output shaft 5 performs elastic eccentric movement in the radial direction.

[0037] As Figures 8-9As shown, a boss 44 is provided at the center of one end of the axial sheath 4 facing the first through hole 12. The boss 44 and the first through hole 12 are of matching dimensions. Limited slots 47 are symmetrically embedded on both sides of the boss 44. Limited components 16 corresponding and adapted to the limited slots 47 are symmetrically embedded on both sides in the first through hole 12. Two groups of second blind holes 17 communicating with the limited components 16 are embedded at the end of the semi-driving sleeve 1 outside the first through hole 12. Multiple groups of third blind holes 18 are also embedded at the end of the semi-driving sleeve 1 outside the first through hole 12. The multiple groups of third blind holes 18 and the second blind holes 17 are distributed in an annular array outside the first through hole 12, and the second blind holes 17 and the third blind holes 18 are correspondingly arranged with the first connection holes 14. In this way, the limited components 16 can be used to cooperate with the two groups of second blind holes 17 to form a limit, thereby restricting the axial sliding of the axial sheath 4, and thus realizing the locking of the axial protection. Preferably, the limited component 16 includes a first blind hole 1601 embedded in the semi-driving sleeve 1 and opening towards the first through hole 12. A limited block 1602 is connected in the first blind hole 1601 through a third spring. The limited block 1602 is arranged opposite to the boss 44 and is of matching dimensions. Among them, under normal circumstances, the third spring acts on the end of the first blind hole 1601 away from the inner wall of the opening of the first through hole 12 or is flush with it. The limited block 1602 is slidably adapted to the first blind hole 1601 and slides relatively hermetically. The second blind hole 17 is communicated and arranged at one end of the first blind hole 1601 away from the first through hole 12. In this way, when pressurized from one side of the second blind hole 17, the limited block 1602 can slide out of the first blind hole 1601 and extend into the boss 44 to form a clamping. In this way, during subsequent rotation or when one end of the output shaft 5 bears pressure, the axial sliding of the axial sheath 4 relative to the semi-driving sleeve 1 will not be caused. The side of the opening of the boss 44 close to the output shaft 5 is an inclined surface, and the inclined surface extends to the middle of the boss 44. In this way, even if there is a small amount of deformation after the first spring is used for a long time, when the end of the limited block 1602 approaches the boss 44, the axial sheath 4 can still be pushed to the fixed position through the inclined surface to complete the limit cooperation.

[0038] As Figures 2-8 shown, a limited hole 52 is embedded at the center of the end of the output shaft 5 extending into the opening 41. A stepped hole 45 is penetrated through the center of the boss 44. A transmission rod 46 with a corresponding end and matching dimensions to the limited hole 52 is slidably fitted in the stepped hole 45. The end of the transmission rod 46 away from the limited hole 52 is connected to the inside of the stepped hole 45 through a fourth spring. The fourth spring acts on the end of the transmission rod 46 away from the limited hole 52. When the end of the transmission rod 46 bears a force, it can squeeze the fourth spring and extend the end into the limited hole 52 to form a cooperation, thereby restricting the radial elastic movement of the output shaft 5 relative to the axial sheath 4, and thus restricting the protection of the output shaft 5 in the radial direction during rotation.

[0039] For the convenience of adjusting and controlling the axial and radial protection during transmission when the output shaft 5 outputs, as Figures 1-2 and Figures 10-12 shown, a gasket 2 is disposed between the semi-driving sleeve 1 and the input shaft 3 in a fitting manner. A plurality of groups of second connection holes 21 that are opposite to and dimensionally adapted to the first connection holes 14 and the third connection holes 32 are disposed through the gasket 2 in an annular array. Second through holes 23 are symmetrically disposed through the gasket 2. A piston rod 24 is slidably fitted in the second through holes 23. The second through holes 23 are correspondingly disposed with the second blind holes 17 or the third blind holes 18. The diameter of the third blind hole 18 is larger than the diameters of the second blind hole 17 and the piston rod 24. The piston rod 24 is slidably fitted with the second blind hole 17 correspondingly. Preferably, the second through holes 23 are through holes with a dumbbell-shaped cross section. Pistons are disposed at both ends of the piston rod 24. The middle part of the piston rod 24 is slidably adapted to the middle part of the second through holes 23. The pistons at both ends of the piston rod 24 are dimensionally adapted to both ends of the second through holes 23. Further, a convex block 22 is fixedly disposed at the center of the gasket 2. The convex block 22 is correspondingly disposed with the driving rod 46. A fourth blind hole 33 that is dimensionally matched with the convex block 22 is embedded at the center of the relative position between the input shaft 3 and the semi-driving sleeve 1. During use, it is convenient for the piston rod 24 to slide in the middle part of the second through holes 23. And no matter which end it slides to, that is, no matter which side of the gasket 2 faces the semi-driving sleeve 1 and which side faces the input shaft 3, the corresponding effects can be achieved.

[0040] During use, when elastic protection in the axial direction is required during processing, the convex block 22 on the gasket 2 can be oriented towards the semi-driving sleeve 1 side, and the second through holes 23 can be aligned with the third blind holes 18. At this time, naturally, the first connection holes 14 on the first connection flange 13, the second connection holes 21 on the gasket 2, and the third connection holes 32 on the input shaft 3 are in a one-to-one correspondence relationship. The connecting member 6 can be sequentially passed through and tightened, so that the semi-driving sleeve 1, the gasket 2, and the input shaft 3 are formed into a whole. At this time, the convex block 22 pushes the driving rod 46 and presses the stepped hole 45. The end of the driving rod 46 enters the limiting hole 52, so that the output shaft 5 cannot elastically move in the radial direction through the cooperation of the radial adjustment ribs 51 and the radial adjustment grooves 43. At this time, when the input shaft 3 rotates, it can drive the semi-driving sleeve 1 to rotate. The semi-driving sleeve 1 drives the axial protective sleeve 4 to rotate through the cooperation of the first chute 15 and the convex ribs 48, and then drives the output shaft 5 to rotate coaxially. At the same time, the axial protective sleeve 4 can achieve elastic protection in the axial direction through the elastic connection of the convex ribs 48 in the first chute 15.

[0041] When elastic protection in the radial direction is required during processing, the bump 22 on the gasket 2 can be oriented towards the input shaft 3 side, and the bump 22 is engaged with the fourth blind hole 33, while the second through hole 23 is aligned with the second blind hole 17. Naturally, at this time, the first connection holes 14 on the first connection flange 13, the second connection holes 21 on the gasket 2, and the third connection holes 32 on the input shaft 3 are in a one-to-one correspondence relationship. The connecting piece 6 can be sequentially passed through and tightened, thereby forming a whole of the half drive sleeve 1, the gasket 2, and the input shaft 3. At this time, the end of the piston rod 24 extends into the second blind hole 17, thereby squeezing and pushing the end of the limit block 1602 into the boss 44, thereby restricting the axial sliding of the axial sheath 4 relative to the half drive sleeve 1 in the axial direction. When the input shaft 3 drives the half drive sleeve 1 to rotate, the output shaft 5 can elastically move in the radial direction through the cooperation of the radial adjustment rib 51 and the radial adjustment groove 43, thereby achieving elastic protection in the radial direction.

[0042] When elastic protection in the axial and radial directions is not required, the bump 22 on the gasket 2 can be oriented towards the half drive sleeve 1 side, and the second through hole 23 is aligned with the second blind hole 17. At this time, the end of the piston rod 24 extends into the second blind hole 17, thereby squeezing and pushing the end of the limit block 1602 into the boss 44, thereby restricting the axial sliding of the axial sheath 4 relative to the half drive sleeve 1 in the axial direction. Naturally, at this time, the first connection holes 14 on the first connection flange 13, the second connection holes 21 on the gasket 2, and the third connection holes 32 on the input shaft 3 are in a one-to-one correspondence relationship. The connecting piece 6 can be sequentially passed through and tightened, thereby forming a whole of the half drive sleeve 1, the gasket 2, and the input shaft 3. At this time, the bump 22 pushes the transmission rod 46 and squeezes the stepped hole 45, and the end of the transmission rod 46 enters the limit hole 52, so that the output shaft 5 cannot elastically move in the radial direction through the cooperation of the radial adjustment rib 51 and the radial adjustment groove 43. At this time, when the input shaft 3 rotates, it can drive the half drive sleeve 1 to rotate. The half drive sleeve 1 drives the axial sheath 4 to rotate through the cooperation of the first chute 15 and the convex rib 48, and then drives the output shaft 5 to rotate coaxially. In this way, elastic protection can be restricted in both the axial and radial directions.

[0043] When elastic protection is required in both the axial and radial directions, the bump 22 on the gasket 2 can be oriented towards the input shaft 3 side, and the bump 22 is engaged with the fourth blind hole 33. At the same time, the second through hole 23 is aligned with the third blind hole 18. Naturally, at this time, the first connection holes 14 on the first connection flange 13, the second connection holes 21 on the gasket 2, and the third connection holes 32 on the input shaft 3 are in a one-to-one correspondence relationship. The connecting piece 6 can be sequentially passed through and tightened, thereby forming a whole of the half drive sleeve 1, the gasket 2, and the input shaft 3. The axial sheath 4 can achieve axial elastic protection through the elastic connection of the convex rib 48 in the first chute 15, and the output shaft 5 can elastically move in the radial direction through the cooperation of the radial adjustment rib 51 and the radial adjustment groove 43, thereby achieving elastic protection in the radial direction.

[0044] A shaft connecting member of a metal cutting device includes the above transmission mechanism. In this way, during the use of the metal cutting device, the convenience of using the tool head and tool holder can be improved in cutting, boring, and other metal processing operations through the selectable elastic protection provided by it. Structures other than the transmission mechanism are all prior arts and will not be elaborated here.

Claims

1. A transmission mechanism, comprising a semi - transmission sleeve and an input shaft, Characterized in that, An axial sheath is arranged inside one end of the semi - transmission sleeve, the axial sheath is axially slidably and cooperatively connected with the semi - transmission sleeve, an output shaft is arranged at one end of the axial sheath away from the input shaft, the output shaft and the axial sheath are radially elastically cooperatively connected, and the semi - transmission sleeve and the input shaft are assembled and connected through a connecting piece; A sliding cavity is embedded at one end of the semi - transmission sleeve, a first through - hole communicating with the sliding cavity is arranged through the other end of the semi - transmission sleeve, the axial sheath is located in the sliding cavity, the outer periphery of the axial sheath is slidably adapted to the inner wall of the sliding cavity, the inner wall of the sliding cavity is embedded with first sliding grooves in an annular array, the first sliding grooves extend along the axial direction of the semi - transmission sleeve, a convex rib slidably adapted to the first sliding grooves is arranged on the outer periphery of the axial sheath, and a first spring is connected between the convex rib and the first sliding grooves; An opening is embedded at one end of the axial sheath facing the opening of the sliding cavity, the end of the output shaft extends into the opening, radial adjustment grooves are symmetrically embedded on both sides inside the opening, radial adjustment ribs slidably adapted to the radial adjustment grooves are symmetrically arranged on the outer periphery of the end of the output shaft, a second spring is connected between the radial adjustment ribs and the radial adjustment grooves, the radial adjustment ribs are arranged along the axial direction of the output shaft, the diameter of the output shaft is smaller than the inner diameter of the opening, and a flexible ring is embedded on the inner wall of the opening, and the flexible ring is movably and fittingly sleeved on the outer periphery of the output shaft; A convex platform is arranged at the center of one end of the axial sheath facing the first through - hole, the convex platform and the first through - hole are dimensionally adapted, limiting grooves are symmetrically embedded on both sides of the convex platform, limiting components corresponding and adapted to the limiting grooves are symmetrically embedded on both sides inside the first through - hole, two groups of second blind holes communicating with the limiting components are embedded at the end of the semi - transmission sleeve outside the first through - hole, and multiple groups of third blind holes are also embedded at the end of the semi - transmission sleeve outside the first through - hole. The multiple groups of third blind holes and the second blind holes are distributed in an annular array outside the first through - hole, and the second blind holes and the third blind holes are both correspondingly arranged with the first connection holes.

2. A transmission mechanism according to claim 1, Characterized in that, First connection flanges and second connection flanges are symmetrically sleeved on the outer peripheries of the opposite ends of the semi - transmission sleeve and the input shaft respectively, and first connection holes and third connection holes are respectively and correspondingly arranged through the first connection flanges and the second connection flanges.

3. A transmission mechanism according to claim 1, Characterized in that, The limiting component includes a first blind hole embedded in the semi - transmission sleeve and opening towards the first through - hole, a limiting block is connected in the first blind hole through a third spring, and the limiting block is arranged opposite to the convex platform and is dimensionally adapted.

4. A transmission mechanism according to claim 1, Characterized in that, A limiting hole is embedded at the center of the end of the output shaft extending into the opening. A stepped hole is penetrated through the center of the boss. A transmission rod is slidably fitted in the stepped hole, with the end corresponding to and having a size adapted to the limiting hole. The end of the transmission rod away from the limiting hole is connected to the inside of the stepped hole through a fourth spring, and the fourth spring acts on the end of the transmission rod to move away from the limiting hole.

5. A transmission mechanism according to claim 4, wherein, A gasket is disposed in a fitting manner between the semi-transmission sleeve and the input shaft. A plurality of groups of second connection holes opposite to and having a size adapted to the first connection holes and the third connection holes are penetrated through the gasket in an annular array. Second through holes are symmetrically penetrated through the gasket, and piston rods are slidably fitted in the second through holes.

6. A transmission mechanism according to claim 5, wherein, A convex block is fixedly disposed at the center of the gasket. The convex block is correspondingly disposed with the transmission rod. A fourth blind hole having a size matching that of the convex block is embedded at the center of the relative position between the input shaft and the semi-transmission sleeve.

7. A rotating shaft connecting member of a metal cutting device, wherein, It includes the transmission mechanism according to any one of claims 1-6.

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