Eccentric spindle structure for machine tool

Abstract

The invention discloses an eccentric main shaft structure for a machine tool, and belongs to the technical field of turning. The device mainly comprises an eccentric sleeve, a core shaft eccentrically arranged in the eccentric sleeve and a rotary vane, a partition cavity is formed in the eccentric sleeve, the axis of a mounting base and the axis of the partition cavity are staggered, a first communicating port and a second communicating port are formed in the side wall of the partition cavity, and the first communicating port and the second communicating port are located on the two sides of a peripheral sealing part respectively and are close to the peripheral sealing part; the eccentric sleeve is provided with a first cooling flow channel and a second cooling flow channel, one end of the first cooling flow channel is provided with a first flow channel port, one end of the second cooling flow channel is provided with a second flow channel port communicated with the first flow channel port, the other end of the first cooling flow channel is communicated with the first communication port, and the other end of the second cooling flow channel is communicated with the second communication port. And the rotary blades extend in the axial direction of the mandrel, are arranged on the peripheral wall of the mounting seat in a sliding manner in the radial direction of the mandrel, and elastically extend out of the mounting seat. According to the eccentric main shaft structure for the machine tool, the structure can be simplified, and the cost can be reduced.

Description

Technical Field

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

[0002] The eccentric spindle structure for machine tools includes an eccentric sleeve and a core shaft rotatably fitted in the eccentric sleeve. In order to cool the core shaft rotating at high speed, a cooling channel is usually arranged around the core shaft in the eccentric sleeve so that the cooling medium can complete the circulation cooling work in the cooling channel. However, in the existing eccentric spindle structure, it is necessary to apply power to the flow of the cooling medium through a pump unit, which has a complex structure and high cost.

[0003] Therefore, it is necessary to provide a new eccentric spindle structure for machine tools. Summary of the invention

[0004] Based on the above problems existing in the prior art, an object of an embodiment of the present invention is to provide an eccentric spindle structure for a machine tool, which can simplify the structure and reduce the cost.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an eccentric spindle structure for a machine tool, comprising an eccentric sleeve, a core shaft eccentrically arranged in the eccentric sleeve, and a rotary vane, wherein a partition cavity is arranged inside the eccentric sleeve, the axis center of the partition cavity coincides with the axis center of the eccentric sleeve, a mounting seat at least partially accommodated in the partition cavity is sleeved on the core shaft, the axis center of the mounting seat is staggered from the axis center of the partition cavity, and the outer peripheral wall of the mounting seat is linearly abutted against the peripheral side wall of the partition cavity, thereby a peripheral side sealing portion is formed by abutting between the outer peripheral wall of the mounting seat and the peripheral side wall of the partition cavity, and a connecting port 1 and a connecting port 2 are arranged on the side wall of the partition cavity, and the connecting port 1 and the connecting port 2 are respectively located on both sides of the peripheral side sealing portion and close to the peripheral side. Sealing part, the eccentric sleeve is provided with cooling channel 1 and cooling channel 2, one end of the cooling channel 1 is provided with channel port 1, one end of the cooling channel 2 is provided with channel port 2, the channel port 1 is connected with the channel port 2, the other end of the cooling channel 1 is connected with the connecting port 1, and the other end of the cooling channel 2 is connected with the connecting port 2, the rotary vane extends along the axial direction of the core shaft, and the rotary vane is set on the outer peripheral wall of the mounting seat along the radial sliding of the core shaft, and the rotary vane elastically extends out on the mounting seat so that the outer side edge of the rotary vane always keeps against the circumferential side wall of the compartment, and a working chamber is formed in the compartment by the circumferential side wall of the compartment and the outer peripheral wall of the mounting seat, and the working chamber is located between the circumferential sealing part and the rotary vane.

[0006] Furthermore, the inner cavity of the eccentric sleeve is provided with an eccentric mounting hole, the axis of the eccentric mounting hole coincides with the axis of the core shaft, the axis of the eccentric mounting hole is staggered with the axis of the outer peripheral wall of the eccentric sleeve, and the core shaft is coaxially arranged in the eccentric mounting hole.

[0007] Furthermore, the inner diameter of the compartment is larger than the inner diameter of the eccentric mounting hole, so that sealing step walls are formed at both ends of the compartment, and the sealing step walls are sealed against the opposite end surfaces of the mounting seat.

[0008] 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.

[0009] Furthermore, the cooling channel 1 is in an S-shaped structure and is arranged around the circumference of the eccentric sleeve. The cooling channel 2 is also in an S-shaped structure and is arranged around the circumference of the eccentric sleeve. The cooling channel 1 and the cooling channel 2 are respectively located at the two ends of the compartment.

[0010] Furthermore, a diffusion structure is provided on the outer peripheral wall of the mounting seat.

[0011] Furthermore, a pressure valve is installed in the communication port 1 or the communication port 2.

[0012] Furthermore, a slide groove is provided on the mounting seat along the radial direction of the core shaft, and the rotary vane is slidably mounted in the slide groove.

[0013] Furthermore, an elastic member is provided in the slide groove and between the rotary vane and the slide groove, and the elastic member is used to apply elastic force to the rotary vane to drive the rotary vane to approach and extend toward the peripheral side wall of the compartment.

[0014] Furthermore, two rotating blades are symmetrically arranged on the mounting seat, and the two rotating blades are symmetrically arranged on both sides of the core shaft.

[0015] 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 spindle structure for a machine tool, which comprises an eccentric sleeve, a core shaft eccentrically arranged in the eccentric sleeve and a rotary vane, wherein a partition cavity is arranged inside the eccentric sleeve, the axis center of the partition cavity coincides with the axis center of the eccentric sleeve, a mounting seat at least partially accommodated in the partition cavity is sleeved on the core shaft, the axis center of the mounting seat is staggered from the axis center of the partition cavity, and the outer peripheral wall of the mounting seat is linearly abutted against the peripheral side wall of the partition cavity, thereby a peripheral side sealing portion is formed by abutting between the outer peripheral wall of the mounting seat and the peripheral side wall of the partition cavity, a connecting port 1 and a connecting port 2 are arranged on the side wall of the partition cavity, the connecting port 1 and the connecting port 2 are respectively located on both sides of the peripheral side sealing portion and close to the peripheral side sealing portion, a cooling channel 1 and a cooling channel 2 are arranged on the eccentric sleeve, a channel port 1 is arranged at one end of the cooling channel 1, and a cooling channel port 1 is arranged at one end of the cooling channel 1. One end of the cooling flow channel 2 is provided with a flow channel port 2, the flow channel port 1 is connected with the flow channel port 2, the other end of the cooling flow channel 1 is connected with the connecting port 1, and the other end of the cooling flow channel 2 is connected with the connecting port 2. The rotary vane extends along the axial direction of the core shaft, and the rotary vane is set on the outer peripheral wall of the mounting seat for radial sliding along the core shaft, and the rotary vane elastically extends on the mounting seat, so that the outer side edge of the rotary vane always keeps against the peripheral side wall of the compartment. The compartment is defined by the peripheral side wall of the compartment and the outer peripheral wall of the mounting seat to form a working chamber, and the working chamber is located between the peripheral side sealing part and the rotary vane, so that when the core shaft rotates and drives the rotary vane to rotate in the first direction, the rotary vane rotates away from the connecting port 1 along the side of the connecting port 1 away from the peripheral side sealing part, so that the volume of the working chamber connected to the connecting port 1 gradually increases, thereby making the working chamber The reduction in cavity pressure forms a negative pressure, which causes the cooling medium in cooling channel one to flow from connecting port one to the compartment cavity. When the rotary vane rotates to the side of connecting port two close to the peripheral sealing portion and rotates close to connecting port two, the volume of the working cavity connected to connecting port two is gradually reduced, thereby reducing the pressure of the working cavity connected to connecting port two, forming a high pressure, thereby forcing the cooling medium sucked into the compartment cavity from connecting port one to flow out from connecting port two. The cooling medium flows out of connecting port two and circulates through cooling channel two before entering cooling channel one, completing the circulation of the cooling medium. Alternatively, when the core shaft rotates and drives the rotary vane to rotate in the second direction, the rotary vane rotates away from connecting port two along the side of connecting port two away from the peripheral sealing portion, causing the volume of the working cavity connected to connecting port two to gradually increase, thereby causing the working The reduction in cavity pressure forms a negative pressure, which causes the cooling medium in the cooling channel two to flow from the connecting port two to the partition cavity. When the rotary vane rotates to the side of the connecting port one close to the peripheral sealing portion and rotates close to the connecting port one, the volume of the working cavity connected to the connecting port one is gradually reduced, thereby reducing the pressure of the working cavity connected to the connecting port one, forming a high pressure, thereby forcing the cooling medium sucked into the partition cavity from the connecting port two to flow out from the connecting port one. The cooling medium flows out of the connecting port one and circulates through the cooling channel one before entering the cooling channel two, completing the circulation of the cooling medium. Therefore, the eccentric spindle structure for machine tools provided in the embodiment of the present invention drives the cooling medium through the rotation of the core shaft, without the need for an additional pump unit. Compared with the prior art, the structure is simplified and the additional equipment cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 A front view of an eccentric spindle structure for a machine tool provided by an embodiment of the present invention.

[0018] Figure 2 For along Figure 1 Cross-sectional view along the EE direction.

[0019] Figure 3 An exploded view of an eccentric spindle structure for a machine tool provided in an embodiment of the present invention.

[0020] Figure 4 for Figure 1 The schematic diagram of the eccentric spindle structure for the machine tool shown is shown from another perspective.

[0021] Figure 5 For along Figure 4 Cross-sectional view in the FF direction.

[0022] Figure 6 A longitudinal sectional view of an eccentric sleeve provided in an embodiment of the present invention.

[0023] Figure 7 A perspective view of an eccentric sleeve provided in accordance with an embodiment of the present invention.

[0024] Figure 8 for Figure 7 A schematic diagram of the eccentric sleeve shown in another perspective.

[0025] Fig. 9 A perspective view of the eccentric sleeve, the core shaft and the rotating vane provided in an embodiment of the present invention when they are matched.

[0026] Fig.10 for Figure 2 A magnified schematic diagram of area A in the middle.

[0027] Fig.11 for Figure 1 The schematic diagram of the eccentric spindle structure for the machine tool shown is shown from another perspective.

[0028] Fig.12 For along Fig.11 Cross-sectional view along the GG direction.

[0029] Among them, the figure marks in the figure are: 1. eccentric sleeve; 11. eccentric mounting hole; 12. end cover one; 121. interface one; 13. end cover two; 131. interface two; 14. compartment; 141. working chamber; 142. sealing step wall; 15. connecting port one; 16. connecting port two; 2. core shaft; 21. mounting seat; 211. slide groove; 3. cooling channel one; 31. channel port one; 32. docking end one; 4. cooling channel two; 41. channel port two; 42. docking end two; 5. peripheral side sealing part; 6. rotary vane; 7. sleeve flange; 8. bearing; 9. diffusion structure; 200. transfer chamber. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Please refer to Figures 1 to 12 As shown, an eccentric spindle structure for a machine tool provided by the present invention is now described. The eccentric spindle structure for a machine tool comprises an eccentric sleeve 1, a core shaft 2 eccentrically arranged in the eccentric sleeve 1, and a rotary vane 6. A compartment 14 is provided inside the eccentric sleeve 1, and the axis of the compartment 14 coincides with the axis of the eccentric sleeve 1. A mounting seat 21 at least partially accommodated in the compartment 14 is sleeved on the core shaft 2. The axis of the mounting seat 21 is staggered from the axis of the compartment 14, and the outer peripheral wall of the mounting seat 21 is linearly abutted against the peripheral side wall of the compartment 14, so that a peripheral side sealing portion 5 is formed by abutting between the outer peripheral wall of the mounting seat 21 and the peripheral side wall of the compartment 14. A connecting port 15 and a connecting port 2 16 are provided on the side wall of the compartment 14. Fig. 9 As shown, the communication port 15 and the communication port 2 16 are respectively located on both sides of the peripheral sealing portion 5 and close to the peripheral sealing portion 5. Figure 7 and Figure 8 As shown, the eccentric sleeve 1 is provided with a cooling channel 1 3 and a cooling channel 2 4, one end of the cooling channel 1 3 is provided with a channel port 1 31, one end of the cooling channel 2 4 is provided with a channel port 2 41, the channel port 1 31 is communicated with the channel port 2 41, the other end of the cooling channel 1 3 is communicated with the connecting port 1 15, the other end of the cooling channel 2 4 is communicated with the connecting port 2 16, the rotary vane 6 extends along the axial direction of the core shaft 2, and the rotary vane 6 is slidably arranged on the outer peripheral wall of the mounting seat 21 along the radial direction of the core shaft 2, and the rotary vane 6 elastically extends from the mounting seat 21, so that the outer side of the rotary vane 6 always keeps against the peripheral side wall of the compartment 14, as shown in FIG. Fig. 9As shown, a working chamber 141 is defined between the peripheral wall of the chamber 14 and the outer peripheral wall of the mounting seat 21 in the compartment 14, and the working chamber 141 is located between the peripheral sealing portion 5 and the rotary vane 6, so that when the core shaft 2 rotates to drive the rotary vane 6 to rotate in the first direction, the rotary vane 6 rotates away from the connecting port 15 along the side of the connecting port 15 away from the peripheral sealing portion 5, so that the volume of the working chamber 141 connected to the connecting port 15 gradually increases, so that the pressure of the working chamber 141 is reduced to form a negative pressure, so that the cooling medium in the cooling channel 3 is driven from the connecting port 15 to the cooling channel 3. When the rotary vane 6 rotates to the side of the connecting port 16 close to the peripheral sealing portion 5 and rotates close to the connecting port 16, the volume of the working chamber 141 connected to the connecting port 16 is gradually reduced, so that the pressure of the working chamber 141 connected to the connecting port 16 is reduced, forming a high pressure, thereby forcing the cooling medium sucked into the compartment 14 from the connecting port 15 to flow out from the connecting port 16. The cooling medium flows out of the connecting port 16 and circulates through the cooling flow channel 2 4 and then enters the cooling flow channel 1 3, completing the circulation of the cooling medium, or when the core shaft The rotation drives the rotary blade 6 to rotate in the second direction. When the rotary blade 6 rotates away from the second connecting port 16 along the side of the connecting port 16 away from the peripheral sealing portion 5, the volume of the working chamber 141 connected to the second connecting port 16 gradually increases, so that the pressure of the working chamber 141 is reduced to form a negative pressure, which promotes the cooling medium in the cooling flow channel 2 4 to flow from the second connecting port 16 to the compartment 14. When the rotary blade 6 rotates to the side of the connecting port 1 15 close to the peripheral sealing portion 5 and rotates close to the connecting port 1 15, the volume of the working chamber 141 connected to the connecting port 1 15 gradually decreases. , so that the pressure of the working chamber 141 connected to the connecting port 15 is reduced, forming a high pressure, thereby forcing the cooling medium sucked into the compartment 14 from the connecting port 2 16 to flow out from the connecting port 15. The cooling medium flows out of the connecting port 15, circulates through the cooling channel 3, and then enters the cooling channel 2 4, completing the circulation of the cooling medium. Therefore, the eccentric spindle structure for machine tools provided by the embodiment of the present invention completes the driving of the cooling medium through the rotation of the core shaft 2, without the need for an additional pump unit. Compared with the prior art, the structure is simplified and the additional equipment cost is reduced.

[0036] like Figure 5 As shown, in some of the embodiments, a slide groove 211 is provided on the mounting seat 21 along the radial direction of the core shaft 2 , and the rotary vane 6 is slidably mounted in the slide groove 211 .

[0037] In some of the embodiments, an elastic member (not shown) is provided in the slide groove 211 and between the rotary vane 6 and the slide groove 211, and the elastic member is used to apply elastic force to the rotary vane 6 to drive the rotary vane 6 to approach and extend toward the peripheral wall of the cavity 14, so that when the rotary vane 6 rotates following the core shaft 2, the outer edge of the rotary vane 6 will always slide along the peripheral wall of the cavity 14 without separating from the peripheral wall of the cavity 14.

[0038] like Figure 3 , Figure 5 and Fig. 9 As shown, in some embodiments, two rotor blades 6 are symmetrically arranged on the mounting seat 21, and the two rotor blades 6 are symmetrically arranged on both sides of the core shaft 2. When one of the rotor blades 6 performs negative pressure liquid suction operation on the working chamber 141 connected to the connecting port 15, the other rotor blade 6 performs pressurized liquid infusion operation on the working chamber 141 connected to the connecting port 2 16; or when one of the rotor blades 6 performs pressurized liquid infusion operation on the working chamber 141 connected to the connecting port 15, the other rotor blade 6 performs negative pressure liquid suction operation on the working chamber 141 connected to the connecting port 2 16, thereby improving the working efficiency. When two rotor blades 6 are symmetrically arranged on the mounting seat 21, a transfer chamber 200 that is not connected to the connecting port 15 and the connecting port 2 16 will be formed in the partition chamber 14.

[0039] In some of the embodiments, a pressure valve is installed in the connecting port 15 or the connecting port 2 16. Specifically, when the connecting port 15 is used as the output position, a pressure valve is installed in the connecting port 15, or when the connecting port 2 16 is used as the output position, a pressure valve is installed in the connecting port 2 16. In this way, when the working chamber 141 connected to the connecting port 15 is compressed and pressurized to the pressure value set by the pressure valve, the pressure valve opens to open the connecting port 15, so as to compress the cooling medium to the ideal pressure and then forcefully pump it out; or when the working chamber 141 connected to the connecting port 2 16 is compressed and pressurized to the pressure value set by the pressure valve, the pressure valve opens to open the connecting port 2 16, so as to compress the cooling medium to the ideal pressure and then forcefully pump it out, thereby performing a strong pumping operation by accumulating force.

[0040] like Figure 6 As shown, in some embodiments, the inner cavity of the eccentric sleeve 1 is provided with an eccentric mounting hole 11, the axis of the eccentric mounting hole 11 coincides with the axis of the core shaft 2, the axis of the eccentric mounting hole 11 is staggered with the axis of the outer peripheral wall of the eccentric sleeve 1, and the core shaft 2 is coaxially arranged in the eccentric mounting hole 11, so that when the eccentric sleeve 1 rotates along the axis of the outer peripheral wall of the eccentric sleeve 1, the eccentric mounting hole 11 and the core shaft 2 will make a circular rotation around the axis of the outer peripheral 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 peripheral wall of the eccentric sleeve 1, thereby achieving the purpose of adjusting the axis position of the core shaft 2.

[0041] like Figure 6 As shown, in some embodiments, the inner diameter of the compartment 14 is larger than the inner diameter of the eccentric mounting hole 11, so that sealing step walls 142 are formed at both ends of the compartment 14, and the sealing step walls 142 are sealed against the opposite end surfaces of the mounting seat 21, thereby isolating the compartment 14 from the outside, so that the working chamber 141 can only communicate with the connecting port 1 15 or the connecting port 2 16.

[0042] like Figure 7 and Figure 8As shown, in some embodiments, the flow channel port 1 31 and the flow channel port 2 41 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 31. Figure 2 and Fig.10 As shown, the end cover 12 is provided with an interface 121, and the interface 121 is connected to the flow channel port 1 31, as shown in FIG. Figure 2 , Fig.11 and Fig.12 As shown, an end cover 2 13 is installed at one end of the eccentric sleeve 1 close to the flow port 2 41, and an interface 2 131 is provided on the end cover 13, and the interface 2 131 is connected to the flow port 2 41, so that the flow port 1 31 and the flow port 2 41 can be connected through the connection between the interface 1 121 and the interface 2 131. Specifically, the interface 1 121 and the interface 2 131 are connected through a pipeline.

[0043] like Figure 7 and Figure 8 As shown, in some of the embodiments, a docking end 32 is provided at one end of the cooling channel 1 3 away from the channel port 1 31, and the docking end 32 is connected to the connecting port 15, and a docking end 2 42 is provided at one end of the cooling channel 2 4 away from the channel port 2 41, and the docking end 2 42 is connected to the connecting port 2 16.

[0044] like Figure 7 and Figure 8 As shown, in some embodiments, cooling channel 1 3 is in an S-shaped structure, and cooling channel 1 3 is arranged around the circumference of the eccentric sleeve 1, cooling channel 2 4 is also in an S-shaped structure, and cooling channel 2 4 is arranged around the circumference of the eccentric sleeve 1, and cooling channel 1 3 and cooling channel 2 4 are respectively located at the two ends of the compartment 14.

[0045] like Figure 2 and Figure 3 As shown, in some of the embodiments, a bearing 8 is arranged between the core shaft 2 and the eccentric sleeve 1, which is used to rotate and install the core shaft 2 in the eccentric sleeve 1 well and stably. Specifically, the outer ring of the bearing 8 is fixed on the inner peripheral wall of the eccentric mounting hole 11, and the inner ring of the bearing 8 is fixed on the outer peripheral wall of the core shaft 2. The high temperature generated by the friction heating of the bearing 8 is transmitted to the eccentric sleeve 1, and then the high temperature is taken away by the cooling channel 1 3 and the cooling channel 2 4 on the eccentric sleeve 1 to achieve the effect of cooling.

[0046] like Figure 5As shown, in some of the embodiments, a diffusion structure 9 is provided on the outer peripheral wall of the mounting seat 21, and the diffusion structure 9 is used to increase the surface area of ​​the mounting seat 21 so as to diffuse the temperature of the core shaft 2 to the surface of the mounting seat 21, and to better achieve the cooling effect by contacting the surface of the mounting seat 21 with the cooling medium. Compared with the prior art method in which the cooling medium only contacts the eccentric sleeve 1, the cooling effect is better.

[0047] 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 machine tool, and the eccentric sleeve 1 is locked in rotational freedom by fixing the sleeve flange 7 to the frame.

[0048] 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 for a machine tool, characterized in that: The invention comprises an eccentric sleeve, a core shaft eccentrically arranged in the eccentric sleeve, and a rotating blade, wherein a partition cavity is arranged inside the eccentric sleeve, the axis center of the partition cavity coincides with the axis center of the eccentric sleeve, a mounting seat at least partially accommodated in the partition cavity is sleeved on the core shaft, the axis center of the mounting seat is staggered with the axis center of the partition cavity, and the outer peripheral wall of the mounting seat is linearly abutted against the peripheral side wall of the partition cavity, so as to form a peripheral side sealing part by abutting between the outer peripheral wall of the mounting seat and the peripheral side wall of the partition cavity, a connecting port 1 and a connecting port 2 are arranged on the side wall of the partition cavity, the connecting port 1 and the connecting port 2 are respectively located on both sides of the peripheral side sealing part and close to the peripheral side sealing part, and a cooling flow is arranged on the eccentric sleeve. Channel one and cooling channel two, one end of the cooling channel one is provided with channel port one, one end of the cooling channel two is provided with channel port two, the channel port one is communicated with the channel port two, the other end of the cooling channel one is communicated with the connecting port one, the other end of the cooling channel two is communicated with the connecting port two, the rotary vane extends along the axial direction of the core shaft, and the rotary vane is arranged on the outer peripheral wall of the mounting seat for radial sliding along the core shaft, and the rotary vane elastically extends out on the mounting seat so that the outer side edge of the rotary vane always keeps against the circumferential side wall of the compartment, a working chamber is formed in the compartment by the circumferential side wall of the compartment and the outer peripheral wall of the mounting seat, and the working chamber is located between the circumferential side sealing portion and the rotary vane.

2. The eccentric spindle structure for machine tools according to claim 1, characterized in that: The inner cavity of the eccentric sleeve is provided with an eccentric mounting hole, the axis of the eccentric mounting hole coincides with the axis of the core shaft, the axis of the eccentric mounting hole is staggered with the axis of the outer peripheral wall of the eccentric sleeve, and the core shaft is coaxially arranged in the eccentric mounting hole.

3. The eccentric spindle structure for machine tools according to claim 2, characterized in that: The inner diameter of the compartment is larger than the inner diameter of the eccentric mounting hole, so that sealing step walls are formed at both ends of the compartment, and the sealing step walls are sealed against the opposite end surfaces of the mounting seat.

4. The eccentric spindle structure for machine tools 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.

5. The eccentric spindle structure for machine tools according to claim 1, characterized in that: The cooling channel 1 is in an S-shaped structure and is arranged around the circumference of the eccentric sleeve. The cooling channel 2 is also in an S-shaped structure and is arranged around the circumference of the eccentric sleeve. The cooling channel 1 and the cooling channel 2 are respectively located at the two ends of the compartment.

6. The eccentric spindle structure for machine tools according to claim 1, characterized in that: A diffusion structure is provided on the outer peripheral wall of the mounting seat.

7. The eccentric spindle structure for machine tools according to claim 1, characterized in that: A pressure valve is installed in the first communication port or the second communication port.

8. The eccentric spindle structure for machine tools according to claim 1, characterized in that: The mounting seat is provided with a slide groove along the radial direction of the core shaft, and the rotary vane is slidably mounted in the slide groove.

9. The eccentric spindle structure for machine tools according to claim 8, characterized in that: An elastic member is arranged in the slide groove and between the rotary vane and the slide groove, and the elastic member is used to apply elastic force to the rotary vane to drive the rotary vane to approach and extend toward the peripheral side wall of the compartment.

10. The eccentric spindle structure for a machine tool according to any one of claims 1 to 9, characterized in that: Two rotating blades are symmetrically arranged on the mounting seat, and the two rotating blades are symmetrically arranged on both sides of the core shaft.

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