Eccentric main shaft structure

Abstract

The invention discloses an eccentric main shaft structure, and belongs to the technical field of turning. Mainly comprises an eccentric sleeve, a mandrel eccentrically arranged in the eccentric sleeve, an action arm and a lock plate, the eccentric sleeve is provided with a cooling flow channel, the eccentric sleeve is further provided with a first flow channel port and a second flow channel port, the first flow channel port and the second flow channel port are communicated with the two ends of the cooling flow channel respectively, and the action arm comprises a sliding sleeve, a piston and an elastic piece. The sliding sleeve is connected with the eccentric sleeve, an inner cavity of the sliding sleeve is communicated with the cooling flow channel, the piston is slidably installed in the sliding sleeve in the radial direction of the mandrel, one end of the piston faces the cooling flow channel, the other end of the piston faces the external environment, and the elastic piece is connected with the piston and used for applying elastic force to the piston all the time so as to drive the piston to slide to be close to the cooling flow channel. Meanwhile, the piston is far away from the mandrel in the radial direction of the mandrel, and the locking plate is connected with the piston. According to the eccentric main shaft structure, the operation of adjusting the center distance of the supporting rollers can be simplified, and the operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of turning, and in particular to an eccentric spindle structure. Background Art

[0002] High-purity crystalline silicon is the basic raw material used in the electronics and solar photovoltaic industries. One of the important production links in the production process of crystalline silicon wafers is slicing. With the development of the photovoltaic industry, the reliability requirements for crystalline silicon slicers are getting higher and higher.

[0003] In order to achieve the adjustable center distance between the two support rollers, the existing silicon wafer slicer is designed with an eccentric spindle structure, such as Figure 1 As shown, the existing eccentric main shaft structure usually installs the core shaft 2 eccentrically in the eccentric sleeve 1, and the eccentric sleeve 1 is then rotatably installed on the frame, so that when the eccentric sleeve 1 rotates at different angles, it drives the core shaft 2 to make a circular motion around the axis of the eccentric sleeve 1, so as to adjust the axis of the core shaft 2. However, when the eccentric main shaft structure is in use, the two eccentric main shaft structures need to be installed at the two ends of the support roller 100 respectively, so that the two ends of the support roller 100 are coaxially connected to the core shafts of the two eccentric main shaft structures respectively. When adjusting the eccentric main shaft structure at one end, it is necessary to operate synchronously and adjust the eccentric main shaft structure at the other end, so as to ensure that the two eccentric sleeves 1 at the two ends of the support roller 100 rotate at the same angle, so as to maintain the coaxial state of the two core shafts 2 at the two ends of the support roller 100. The operation is cumbersome and the efficiency is low.

[0004] Therefore, it is necessary to provide a new eccentric spindle structure. Summary of the invention

[0005] Based on the above problems existing in the prior art, an object of an embodiment of the present invention is to provide an eccentric main shaft structure, which can simplify the operation of adjusting the center distance of the support rollers and improve the operating efficiency.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an eccentric main shaft structure, including an eccentric sleeve, a core shaft eccentrically arranged in the eccentric sleeve, an action arm and a locking plate, a cooling channel is arranged on the eccentric sleeve, and a channel port 1 and a channel port 2 are also arranged on the eccentric sleeve, and the channel port 1 and the channel port 2 are respectively connected to the two ends of the cooling channel, the action arm includes a sliding sleeve, a piston and an elastic member, the sliding sleeve is connected to the eccentric sleeve, and the inner cavity of the sliding sleeve is connected to the cooling channel, the piston is installed in the sliding sleeve along the radial direction of the core shaft, one end of the piston faces the cooling channel, and the other end of the piston faces the external environment, the elastic member is connected to the piston, and the elastic member is used to always apply elastic force to the piston to drive The piston slides close to the cooling channel and at the same time moves away from the core shaft in the radial direction of the core shaft. The locking plate is connected to the piston, and the locking plate is close to the peripheral side wall of the core shaft. When the core shaft stops rotating, the channel port one is closed, and the cooling medium continues to be injected into the cooling channel from the channel port two, or the channel port two is closed, and the cooling medium continues to be injected into the cooling channel from the channel port one, the pressure in the cooling channel will increase. When the pressure in the cooling channel increases to the point where the pressure applied to the end face of the piston facing the cooling channel is greater than the elastic force applied by the elastic member to the end face of the piston facing the external environment, the piston is pushed by the pressure difference to resist the elastic member from sliding radially along the core shaft close to the core shaft, and at the same time drives the locking plate to move and hold against the core shaft, so that the core shaft is locked on the eccentric sleeve.

[0007] Furthermore, the flow channel port one and the flow channel port two are respectively located at the two ends of the eccentric sleeve, and an end cover one is installed at the end of the eccentric sleeve close to the flow channel port one, and an interface one is provided on the end cover one, and the interface one is connected with the flow channel port one, and an end cover two is installed at the end of the eccentric sleeve close to the flow channel port two, and an interface two is provided on the end cover two, and the interface two is connected with the flow channel port two.

[0008] Furthermore, the cooling flow channel includes a main flow channel extending along the axial direction of the eccentric sleeve and arranged on the eccentric sleeve. The eccentric sleeve is provided with a plurality of main flow channels, and the plurality of main flow channels are sequentially connected and communicated with each other.

[0009] Furthermore, a spacer ring is sleeved on the core shaft, and a friction structure for increasing the roughness of the outer peripheral wall of the spacer ring is provided on the outer peripheral wall of the spacer ring corresponding to the lock plate.

[0010] Furthermore, the eccentric sleeve is provided with a plurality of action arms, the locking plates are provided with the same number as the action arms, and the plurality of action arms are distributed around the axis of the core shaft.

[0011] Furthermore, the plurality of main channels are connected in sequence in an S-shape.

[0012] Furthermore, the inner cavity of the eccentric sleeve is provided with an eccentric shaft hole, and the axis of the eccentric shaft hole deviates from the axis of the outer peripheral wall of the eccentric sleeve.

[0013] Furthermore, the cooling channel is arranged on the eccentric sleeve around the axis of the core shaft.

[0014] Furthermore, a bearing is arranged between the core shaft and the eccentric sleeve.

[0015] Furthermore, a sleeve flange is provided at one end of the eccentric sleeve.

[0016] Compared with the prior art, the above technical solution in the embodiment of the present invention has at least one of the following beneficial effects: The present invention provides an eccentric main shaft structure, which includes an eccentric sleeve, a core shaft eccentrically arranged in the eccentric sleeve, an action arm and a locking plate. A cooling channel is arranged on the eccentric sleeve, and a channel port 1 and a channel port 2 are also arranged on the eccentric sleeve. The channel port 1 and the channel port 2 are respectively connected to the two ends of the cooling channel. The action arm includes a sliding sleeve, a piston and an elastic member. The sliding sleeve is connected to the eccentric sleeve, and the inner cavity of the sliding sleeve is connected to the cooling channel. The piston is installed in the sliding sleeve along the radial direction of the core shaft. One end of the piston faces the cooling channel, and the other end of the piston faces the external environment. The elastic member is connected to the piston, and the elastic member is used to always apply elastic force to the piston to drive the piston to slide close to the cooling channel and at the same time make the piston away from the core shaft along the radial direction of the core shaft. The locking plate is connected to the piston, and the locking plate is close to the peripheral side wall of the core shaft. When the core shaft stops rotating, the channel port 1 is closed, and the cooling medium is continuously injected into the cooling channel from the channel port 2, or the channel port 2 is closed, and the cooling medium is continuously injected into the cooling channel from the channel port 2. When the cooling channel is injected into the cooling channel at port one, the pressure in the cooling channel will increase. When the pressure in the cooling channel increases to the point where the pressure applied to the end face of the piston facing the cooling channel is greater than the elastic force applied by the elastic member to the end face of the piston facing the external environment, the piston is pushed by the pressure difference to resist the radial sliding of the elastic member along the core shaft to approach the core shaft, and at the same time drive the locking plate to move and hold against the core shaft, so that the core shaft is retracted and locked on the eccentric sleeve. In this way, when the eccentric main shaft structure provided by the present invention is installed at both ends of the support roller and the core shaft is connected to the support roller, when it is necessary to rotate and adjust the angle of the eccentric sleeve, the core shaft and the eccentric sleeve are locked, so that the eccentric sleeve rotating at one end can drive the eccentric sleeve in the eccentric main shaft structure at the other end to rotate synchronously at the same angle, the operation is simpler and the efficiency is improved. This solves the problem in the prior art that the core shaft and the eccentric sleeve have a certain amount of shaking due to the relative rotation, which makes it impossible for the core shaft to follow the eccentric sleeve to rotate synchronously at the same angle, thereby causing the eccentric sleeve at one end to be unable to rotate alone. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of an existing eccentric spindle structure.

[0019] Figure 2 A longitudinal section of an eccentric spindle structure provided by an embodiment of the present invention Figure 1 .

[0020] Figure 3 A cross-sectional view of an eccentric main shaft structure provided in an embodiment of the present invention.

[0021] Figure 4 A schematic diagram of the three-dimensional structure of an eccentric sleeve provided in an embodiment of the present invention.

[0022] Figure 5 for Figure 4 A schematic perspective view of an eccentric sleeve is shown.

[0023] Figure 6 A longitudinal section of an eccentric spindle structure provided by an embodiment of the present invention Figure 2 .

[0024] Figure 7 A longitudinal section of an eccentric spindle structure provided by an embodiment of the present invention Figure 3 .

[0025] Figure 8 A schematic diagram of the positional relationship among the spindle, the action arm and the locking plate provided in an embodiment of the present invention.

[0026] Fig. 9 A schematic diagram of the positional relationship between the action arm and the locking plate provided in an embodiment of the present invention.

[0027] Fig.10 for Fig. 9 Exploded view of the parts shown.

[0028] Fig.11 for Figure 2 A magnified schematic diagram of area A in the middle.

[0029] Fig.12 A longitudinal section of an eccentric spindle structure provided by an embodiment of the present invention Figure 4 .

[0030] Among them, the figure marks in the figure are: 100, support roller; 1, eccentric sleeve; 11, eccentric shaft hole; 12, end cover one; 121, interface one; 13, end cover two; 131, interface two; 2, core shaft; 21, spacer; 22, friction structure; 3, cooling flow channel; 31, main flow channel; 33, flow channel port one; 34, flow channel port two; 4, action arm; 41, sliding sleeve; 42, piston; 43, elastic part; 5, locking plate; 6, bearing; 7, sleeve flange. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] It should be noted that when an element is referred to as being "connected to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0036] Please refer to Figures 2 to 12As shown, an eccentric main shaft structure provided by the present invention is now described. The eccentric main shaft structure includes an eccentric sleeve 1, a core shaft 2 eccentrically arranged in the eccentric sleeve 1, an action arm 4 and a locking plate 5. A cooling channel 3 is arranged on the eccentric sleeve 1. A channel port 1 33 and a channel port 2 34 are also arranged on the eccentric sleeve 1. The channel port 1 33 and the channel port 2 34 are respectively connected to the two ends of the cooling channel 3, so that the fluid can pass through the channel port 1 33, the cooling channel 3 and the channel port 2 34 in sequence, or the fluid can pass through the channel port 1 33, the cooling channel 3 and the channel port 2 34 in sequence. The port 2 34, the cooling channel 3 and the channel port 1 33 are passed to maintain the flow state of the fluid in the cooling channel 3, and the temperature is taken away by the flowing cooling medium to achieve the cooling effect. The action arm 4 includes a sleeve 41, a piston 42 and an elastic member 43. The sleeve 41 is connected to the eccentric sleeve 1, and the inner cavity of the sleeve 41 is connected to the cooling channel 3. The piston 42 is installed in the sleeve 41 along the radial direction of the core shaft 2, so that one end of the piston 42 faces the cooling channel 3, and the other end of the piston 42 faces the external environment. The elastic member 43 is connected to the piston 42. The elastic member 43 is used to always apply elastic force to the piston 42 to drive the piston 42 to slide close to the cooling channel 3, and at the same time, the piston 42 moves away from the core shaft 2 in the radial direction of the core shaft 2. The lock plate 5 is connected to the piston 42, and the lock plate 5 is close to the peripheral side wall of the core shaft 2. When the channel port 1 33 and the channel port 2 34 at both ends of the cooling channel 3 are opened at the same time, the high-pressure cooling medium can circulate in the cooling channel 3 through the channel port 1 33 and the channel port 2 34, and the eccentric sleeve 1 has a heat dissipation effect. When the core shaft 2 stops rotating, it needs to pass When the eccentric sleeve 1 is rotated to adjust the axial position of the core shaft 2, the flow channel port 1 33 is closed, and the cooling medium is continuously injected into the cooling flow channel 3 from the flow channel port 2 34, or the flow channel port 2 34 is closed, and the cooling medium is continuously injected into the cooling flow channel 3 from the flow channel port 1 33. Due to the limited space in the cooling flow channel 3, the pressure in the cooling flow channel 3 is increased. When the pressure in the cooling flow channel 3 is increased to the point where the pressure applied to the end face of the piston 42 facing the cooling flow channel 3 is greater than the elastic force applied by the elastic member 43 to the end face of the piston 42 facing the external environment, as shown in FIG. Fig.12 As shown, the piston 42 is pushed by the pressure difference to resist the elastic member 43 from sliding radially along the core shaft 2 and approaching the core shaft 2, and at the same time, the locking plate 5 is moved to abut against the core shaft 2, so that the core shaft 2 is locked on the eccentric sleeve 1, refer to Fig.12The locking plate 5 and the core shaft 2 shown in the figure are in a locked state. In this way, when the eccentric main shaft structure provided by the embodiment of the present invention is installed at both ends of the support roller 100 and the core shaft 2 is connected to the support roller 100, when it is necessary to rotate and adjust the angle of the eccentric sleeve 1, the core shaft 2 and the eccentric sleeve 1 are locked. In this way, the eccentric sleeve 1 rotating at one end can drive the eccentric sleeve 1 in the eccentric main shaft structure at the other end to rotate synchronously at the same angle, which makes the operation simpler and the efficiency improved. It solves the problem in the prior art that the core shaft 2 and the eccentric sleeve 1 have a wobble due to their relative rotation, which makes it impossible for the core shaft 2 to follow the eccentric sleeve 1 to rotate synchronously at the same angle, and the eccentric sleeve 1 at one end cannot be rotated alone.

[0037] In addition, an eccentric spindle structure provided by an embodiment of the present invention utilizes the cooling channel 3 for cooling and also utilizes the cooling channel 3 as a driving source for the action arm 4, thereby achieving the effect of simplifying the structure through functional integration, and the two do not interfere with each other. When the cooling channel 3 is used for cooling and cooling, the piston 42 is restricted by the elastic member 43 in the action arm 4 to prevent the piston 42 from moving out of the way. When the core shaft 2 stops rotating and the cooling channel 3 does not need to play a cooling role, the action arm 4 is driven to work through the cooling channel 3 when the core shaft 2 stops rotating, thereby achieving excellent coordination.

[0038] like Figure 2 As shown, in some embodiments, the inner cavity of the eccentric sleeve 1 is provided with an eccentric shaft hole 11, and the axis of the eccentric shaft hole 11 deviates from the axis of the outer wall of the eccentric sleeve 1. In this way, when the eccentric sleeve 1 rotates along the axis of the outer wall of the eccentric sleeve 1, the eccentric shaft hole 11 will make a circular rotation around the axis of the outer wall of the eccentric sleeve 1, driving the axis of the core shaft 2 to make a circular rotation around the axis of the outer wall of the eccentric sleeve 1, thereby achieving the purpose of adjusting the axis position of the core shaft 2.

[0039] like Figure 2 As shown, in some embodiments, the flow channel port 1 33 and the flow channel port 2 34 are respectively located at two ends of the eccentric sleeve 1, and an end cap 12 is installed at one end of the eccentric sleeve 1 close to the flow channel port 1 33. Figure 6As shown, an interface 121 is provided on the end cover 12, and the interface 121 is connected to the flow channel port 1 33. An end cover 13 is installed on the end of the eccentric sleeve 1 close to the flow channel port 2 34, and an interface 2 131 is provided on the end cover 13, and the interface 2 131 is connected to the flow channel port 2 34. In this way, the cooling medium can be connected to the flow channel port 1 33 through the interface 121, and the cooling medium is sequentially output from the flow channel port 2 34 and the interface 2 131 after passing through the cooling flow channel 3, and the output cooling medium returns to the interface 121 again to complete the cycle; or the cooling medium is connected to the flow channel port 2 34 through the interface 2 131, and the cooling medium is sequentially output from the flow channel port 1 33 and the interface 121 after passing through the cooling flow channel 3, and the output cooling medium returns to the interface 2 131 again to complete the cycle.

[0040] like Figure 4 and Figure 5 As shown, in some embodiments, the cooling channel 3 includes a main channel 31 extending along the axial direction of the eccentric sleeve 1 and arranged on the eccentric sleeve 1. The eccentric sleeve 1 is provided with a plurality of main channels 31, which are sequentially connected and communicated. Specifically, in this embodiment, the plurality of main channels 31 are sequentially connected in an S shape. Figure 5 As shown, specifically, in this embodiment, two main channels 31 located at both ends of the cooling channel 3 extend to opposite end surfaces of the eccentric sleeve 1 to form a channel port 1 33 and a channel port 2 34 .

[0041] like Figure 3 As shown, in some embodiments, the cooling channel 3 is arranged on the eccentric sleeve 1 around the axis of the core shaft 2, so that the cooling channel 3 is evenly distributed around the core shaft 2 to cool the high temperature generated by the rotating surface between the core shaft 2 and the eccentric sleeve 1.

[0042] like Figure 2 and Figure 8 As shown, in some embodiments, a spacer ring 21 is sleeved on the core shaft 2, and a friction structure 22 for increasing the roughness of the outer peripheral wall of the spacer ring 21 is provided on the outer peripheral wall of the spacer ring 21 corresponding to the lock plate 5. When the lock plate 5 slides radially along the core shaft 2 and approaches the core shaft 2, the lock plate 5 finally abuts against the outer peripheral wall of the spacer ring 21, so that a friction resistance is generated between the lock plate 5 and the spacer ring 21 on the core shaft 2 to hinder the circumferential rotation of the core shaft 2.

[0043] like Figure 3 As shown, in some of the embodiments, a plurality of action arms 4 are provided on the eccentric sleeve 1, and the locking plates 5 are provided with the same number as the action arms 4. The plurality of action arms 4 are distributed around the axis of the core shaft 2, so that when the action arms 4 drive the locking plates 5 to lock the core shaft 2, the core shaft 2 can be evenly stressed around, thereby avoiding uneven stress on the peripheral side of the core shaft 2, which causes a change in the relative position between the axis of the core shaft 2 and the axis of the eccentric sleeve 1.

[0044] like Figure 2 As shown, in some of the embodiments, a bearing 6 is provided between the core shaft 2 and the eccentric sleeve 1, which is used to rotate the core shaft 2 well and stably in the eccentric sleeve 1. Specifically, the outer ring of the bearing 6 is fixed on the inner circumferential wall of the eccentric shaft hole 11, and the inner ring of the bearing 6 is fixed on the outer circumferential wall of the core shaft 2. The high temperature generated by the friction heating of the bearing 6 is transmitted to the eccentric sleeve 1, and then the high temperature is taken away by the cooling channel 3 on the eccentric sleeve 1.

[0045] like Figure 2 As shown, in some of the embodiments, a sleeve flange 7 is provided at one end of the eccentric sleeve 1, and the sleeve flange 7 is coaxially arranged with the eccentric sleeve 1. The sleeve flange 7 is utilized to realize circumferential limiting fixation of the eccentric sleeve 1. Specifically, the eccentric sleeve 1 is rotatably mounted on the frame of the silicon wafer slicer, and the eccentric sleeve 1 is locked in rotational freedom by fixing the sleeve flange 7 to the frame.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An eccentric spindle structure, characterized in that: The invention comprises an eccentric sleeve, a core shaft eccentrically arranged in the eccentric sleeve, an action arm and a locking plate. A cooling channel is arranged on the eccentric sleeve. A channel port 1 and a channel port 2 are also arranged on the eccentric sleeve. The channel port 1 and the channel port 2 are respectively connected to the two ends of the cooling channel. The action arm comprises a sliding sleeve, a piston and an elastic member. The sliding sleeve is connected to the eccentric sleeve, and the inner cavity of the sliding sleeve is connected to the cooling channel. The piston is installed in the sliding sleeve along the radial direction of the core shaft. One end of the piston faces the cooling channel, and the other end of the piston faces the external environment. The elastic member is connected to the piston. The elastic member is used to always apply elastic force to the piston to drive the piston to slide close to the cooling channel, and at the same time make The piston moves away from the core shaft in the radial direction of the core shaft, and the locking plate is connected to the piston, and the locking plate is close to the peripheral side wall of the core shaft. When the core shaft stops rotating, the flow channel port one is closed, and the cooling medium continues to be injected into the cooling flow channel from the flow channel port two, or the flow channel port two is closed, and the cooling medium continues to be injected into the cooling flow channel from the flow channel port one, the pressure in the cooling flow channel will increase. When the pressure in the cooling flow channel increases to the point where the pressure applied to the end face of the piston facing the cooling flow channel is greater than the elastic force applied by the elastic member to the end face of the piston facing the external environment, the piston is pushed by the pressure difference to resist the elastic member from sliding radially along the core shaft close to the core shaft, and at the same time drives the locking plate to move and hold against the core shaft, so that the core shaft is locked on the eccentric sleeve.

2. The eccentric spindle structure according to claim 1, characterized in that: The flow channel port one and the flow channel port two are respectively located at the two ends of the eccentric sleeve, and an end cover one is installed at the end of the eccentric sleeve close to the flow channel port one, and an interface one is provided on the end cover one, and the interface one is connected with the flow channel port one, and an end cover two is installed at the end of the eccentric sleeve close to the flow channel port two, and an interface two is provided on the end cover two, and the interface two is connected with the flow channel port two.

3. The eccentric main shaft structure according to claim 1, characterized in that: The cooling flow channel comprises a main flow channel which is arranged on the eccentric sleeve and extends along the axial direction of the eccentric sleeve. The eccentric sleeve is provided with a plurality of main flow channels which are sequentially connected and communicated with each other.

4. The eccentric main shaft structure according to claim 1, characterized in that: A spacer is sleeved on the core shaft, and a friction structure for increasing the roughness of the outer peripheral wall of the spacer is provided on the outer peripheral wall of the spacer corresponding to the lock plate.

5. The eccentric main shaft structure according to claim 1, characterized in that: The eccentric sleeve is provided with a plurality of action arms, the locking plates are provided with the same number as the action arms, and the plurality of action arms are distributed around the axis of the core shaft.

6. The eccentric main shaft structure according to claim 3, characterized in that: The plurality of main channels are connected in sequence in an S-shape.

7. The eccentric main shaft structure according to claim 1, characterized in that: The inner cavity of the eccentric sleeve is provided with an eccentric shaft hole, and the axis center of the eccentric shaft hole deviates from the axis center of the outer peripheral wall of the eccentric sleeve.

8. The eccentric main shaft structure according to claim 1, characterized in that: The cooling channel is arranged on the eccentric sleeve around the axis of the core shaft.

9. The eccentric main shaft structure according to claim 1, characterized in that: A bearing is arranged between the core shaft and the eccentric sleeve.

10. The eccentric main shaft structure according to claim 1, characterized in that: A sleeve flange is arranged at one end of the eccentric sleeve.

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