A force-enhancing force-enclosed hydraulic clamping mechanism and a five-axis swing head clamping system

Abstract

The present invention discloses a force-enclosed hydraulic clamping mechanism and a five-axis swing head clamping system, wherein the force-enclosed hydraulic clamping mechanism includes an expansion ring, and the expansion ring includes a main ring, a side ring, and a clamping ring, and the main ring, the side ring, and the clamping ring are coaxial. Beneficial effect: The force-enclosed hydraulic clamping mechanism of the present application injects oil into the annular oil cavity to expand the annular oil cavity to drive the side ring to swing outward, and the outward swing of the side ring drives the clamping ring to swing inward to clamp and fix the friction ring in the annular groove. The annular oil cavity, the side ring, and the clamping ring are arranged around the friction ring, so that the forces acting on the friction ring are balanced with each other and offset inside the clamping ring, and the force acting on the outside is zero, and no additional force will be applied to the friction ring at the moment of clamping the friction ring, thereby playing a role of force sealing and forming a force sealing structure. The position accuracy of the friction ring does not change, thereby ensuring the processing accuracy of the CNC machine tool.

Description

Technical Field

[0001] The invention relates to the field of machine tools, and in particular to a force-enhancing force-enclosed hydraulic clamping mechanism and a five-axis swing head clamping system. Background Art

[0002] The hydraulic clamping mechanism has the advantages of large clamping torque and reliable clamping force, and is widely used in single-turn worktables, dual-axis turntables, and various types of swing heads of CNC machine tools. Currently, the commonly used hydraulic clamping mechanisms are basically unidirectional and cannot form a force seal. Therefore, at the moment of clamping, additional force will be applied to the clamped parts, causing the position accuracy of the clamped parts to change, affecting the processing accuracy of the CNC machine tools. In addition, since the current hydraulic clamping mechanisms are generally driven by oil cylinders, the amount of oil required for the drive is large, and the response is relatively slow. At the same time, the frequent back and forth movement of the piston in the cylinder body can easily cause the dynamic seal to fail and the hydraulic oil to leak, which in turn affects the use and even contaminates other components.

[0003] Since hydraulic clamping requires a large hydraulic pressure, the hydraulic clamping mechanism has a high energy consumption. If a smaller hydraulic pressure can be used to achieve a specified large clamping force, it will undoubtedly help reduce the energy consumption of the hydraulic system of the hydraulic clamping mechanism. Summary of the invention

[0004] The main purpose of the present invention is to propose a force-amplifying force-sealed hydraulic clamping mechanism and a five-axis swing head clamping system, aiming to solve the problems that the existing hydraulic clamping mechanism cannot form a force seal, which will cause the position accuracy of the clamped parts to change, affecting the machining accuracy of CNC machine tools, as well as the problems that dynamic seals are prone to failure, hydraulic oil is prone to leakage, and the hydraulic system has high energy consumption.

[0005] In order to solve the above problems, the present invention proposes a force-enhancing force-sealed hydraulic clamping mechanism, comprising:

[0006] An expansion ring, the expansion ring comprising a main ring, a side ring and a clamp ring, the main ring, the side ring and the clamp ring are coaxial, the side ring and the clamp ring are in a pair and are symmetrically distributed on both sides of the main ring, the inner side of the side ring is sealed and fixedly connected to the outer side of the clamp ring and the main ring, a pair of clamp rings define an annular groove on the inner side of the main ring, and the side ring is spaced apart from the main ring;

[0007] A pair of fixed rings, located outside the pair of side rings, and the pair of fixed rings are arranged on both sides of the main ring, and are detachably sealed and fixedly connected with the main ring and the side rings, so that a closed annular oil cavity is defined between the main ring and the side rings, and the fixed rings are provided with an oil inlet hole and an oil outlet hole connected to the annular oil cavity;

[0008] The friction ring is movably installed in the annular groove one. Hydraulic oil is injected into the annular oil chamber to expand the annular oil chamber to drive the side ring to swing away from the main ring. The swing of the side ring away from the main ring drives the clamping ring to swing closer to the friction ring to clamp and fix the friction ring in the annular groove one.

[0009] In one embodiment, the main ring, the side ring and the clamping ring are integrally formed.

[0010] In one embodiment, the difference between the inner and outer diameters of the side ring is greater than the difference between the inner and outer diameters of the clamp ring.

[0011] In one embodiment, a sealing ring 1 is sandwiched between the pair of fixing rings and the pair of side rings;

[0012] A sealing ring 2 is sandwiched between a pair of fixing rings and the main ring.

[0013] In one embodiment, two communication holes 1 are provided on the main ring, and the annular oil chambers on both sides of the main ring are connected through the communication holes 1;

[0014] The oil inlet hole and the oil outlet hole are respectively connected with a connecting hole.

[0015] In one embodiment, one of the fixing rings is provided with a second connecting hole, the oil inlet hole, and the oil outlet hole, and the oil inlet hole and the oil outlet hole are connected with the first connecting hole and the annular oil cavity defined by the fixing ring through the second connecting hole;

[0016] One end of the second communicating hole is located on the outer circumferential surface of the fixing ring, and a plug is detachably sealed and plugged into the end of the second communicating hole;

[0017] A communicating groove is arranged on the other fixed ring, and the annular oil cavity defined by the fixed ring is communicated with the communicating hole 1 through the communicating groove.

[0018] In addition, the present invention also proposes a five-axis swing head clamping system, including an A / C box, a spindle box, a spindle and any of the aforementioned force-amplifying force-enclosed hydraulic clamping mechanisms, wherein an A-axis core shaft is rotatably installed in the A / C box, the A-axis core shaft is fixedly connected to the spindle box, and the spindle is installed on the spindle box.

[0019] In one embodiment, a bearing seat is fixedly installed in the A / C housing, the A-axis core shaft is rotatably installed on the bearing seat through a bearing, the friction ring is coaxially fixedly connected to the A-axis core shaft, and the fixing ring is fixedly connected to the bearing seat.

[0020] In one embodiment, the friction ring is fixedly connected to the A-axis core shaft by screw 2, and an adjustment ring is sandwiched between the friction ring and the A-axis core shaft. Turning screw 2 drives the friction ring to move axially to extrude the adjustment ring, and the adjustment ring is made of elastic material.

[0021] In one embodiment, a sealing ring three is sandwiched between the bearing seat and the A-axis core shaft, the sealing ring three is coaxial with the A-axis core shaft, the sealing ring three is detachably fixedly connected to the bearing seat, and is slidably connected to the outer circumferential surface of the A-axis core shaft.

[0022] Beneficial effects:

[0023] 1. The force-enhancing force-sealed hydraulic clamping mechanism of the present application injects oil into the annular oil cavity to expand the annular oil cavity and drive the side ring to swing outward. The outward swing of the side ring drives the clamping ring to swing inward to clamp and fix the friction ring in the annular groove. The annular oil cavity, the side ring, and the clamping ring are arranged around the friction ring. Therefore, the forces acting on the friction ring are balanced with each other and offset inside the clamping ring. The force acting on the outside is zero. There is no additional force acting on the friction ring at the moment of clamping the friction ring, thereby playing a role of force sealing and forming a force sealing structure. The position accuracy of the friction ring does not change, thereby ensuring the processing accuracy of the CNC machine tool.

[0024] 2. The annular oil chamber is sealed by the sealing ring 1 and the sealing ring 2. The annular oil chamber has a small volume, a small expansion amount, and a small deformation amount of the side ring, which is beneficial to reducing the energy consumption of the hydraulic system and improving the response speed. In addition, the sealing ring 1 and the sealing ring 2 themselves have a certain elasticity. Therefore, the small deformation amount of the side ring makes the sealing ring 1 and the sealing ring 2 almost in a static sealing state. The sealing effect is much better than the dynamic sealing, the sealing performance is good, and the hydraulic oil is not easy to leak;

[0025] 3. The annular oil chamber expands and the friction ring is clamped and fixed by the force arm structure composed of the side ring and the clamp ring. The hydraulic oil in the annular oil chamber is unloaded, and the side ring and the clamp ring rebound and reset, loosening the clamping of the friction ring. In the force arm structure composed of the side ring and the clamp ring, the force arm where the clamp ring is located is shorter, and the force arm where the side ring is located is longer, so it plays a force-increasing role, so that a small hydraulic pressure is used to push the side ring to swing, which can make the clamp ring generate a large clamping force on the friction ring, and the friction ring is firmly clamped and fixed. The design of the force arm structure is conducive to reducing the energy consumption of the hydraulic system of the hydraulic clamping mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a structural schematic diagram of a force-enhancing force-sealed hydraulic clamping mechanism of the present invention;

[0028] Figure 2 It is a front view of a force-enhancing force-sealed hydraulic clamping mechanism of the present invention;

[0029] Figure 3 yes Figure 2 AA section view in;

[0030] Figure 4 It is a rear view of a hydraulic clamping mechanism with a force-enhancing force seal;

[0031] Figure 5 yes Figure 4 BB section view in;

[0032] Figure 6 It is the internal structure diagram of the five-axis swing head clamping system of the present invention.

[0033] The following are the descriptions of the reference numerals:

[0034] 1. expansion ring; 11. main ring; 12. side ring; 13. annular oil chamber; 14. clamping ring; 15. annular groove 1; 16. connecting hole 1;

[0035] 2. Fixed ring 1; 21. Connecting groove;

[0036] 3. Fixed ring 2; 32. Connecting hole 2; 33. Plug;

[0037] 4. Sealing ring 1; 5. Sealing ring 2; 6. Mounting hole 1;

[0038] 7. Friction ring; 71. Mounting hole 2;

[0039] 8. Oil inlet hole; 9. Oil outlet hole;

[0040] 100. Screw one; 101. Screw two; 102. A-axis core shaft; 103. Adjusting ring; 104. Bearing; 105. Bearing seat; 108. Screw three; 109. A / C housing; 110. Spindle; 111. Spindle housing; 112. Seal three. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention proposes a force-enhancing force-sealed hydraulic clamping mechanism, which injects oil into an annular oil chamber 13 to expand the annular oil chamber 13 and drive the side ring 12 to swing outward. The side ring 12 swings outward and drives the clamping ring 14 to swing inward to clamp and fix the friction ring 7 in the annular groove 15. The annular oil chamber 13, the side ring 12, and the clamping ring 14 are arranged around the friction ring 7, so the forces acting on the friction ring 7 are balanced with each other and offset inside the clamping ring 14, and the force acting on the outside is zero. There is no additional force acting on the friction ring 7 at the moment of clamping the friction ring 7, thereby playing a role of force sealing and forming a force sealing structure. The position accuracy of the friction ring 7 does not change, thereby ensuring the processing accuracy of the CNC machine tool.

[0046] At the same time, the annular oil chamber 13 is sealed by the sealing ring 1 4 and the sealing ring 2 5. The annular oil chamber 13 has a small volume, a small expansion amount, and a small deformation amount of the side ring 12, which is beneficial to reducing the energy consumption of the hydraulic system and improving the response speed. In addition, the sealing ring 1 4 and the sealing ring 2 5 themselves have a certain elasticity. Therefore, the small deformation amount of the side ring 12 makes the sealing ring 1 4 and the sealing ring 2 5 almost in a static sealing state. The sealing effect is much better than the dynamic sealing, the sealing performance is good, and the hydraulic oil is not easy to leak.

[0047] The annular oil chamber 13 expands and clamps the friction ring 7 with the help of the lever arm structure composed of the side ring 12 and the clamp ring 14. When the hydraulic oil in the annular oil chamber 13 is removed, the side ring 12 and the clamp ring 14 rebound and reset, and the clamping of the friction ring 7 is released. In the lever arm structure composed of the side ring 12 and the clamp ring 14, the lever arm where the clamp ring 14 is located is shorter, and the lever arm where the side ring 12 is located is longer, so it plays a force-increasing role, so that a small hydraulic pressure is used to push the side ring 12 to swing, which can make the clamp ring 14 generate a large clamping force on the friction ring 7, and the friction ring 7 is firmly clamped and fixed. The design of the lever arm structure is conducive to reducing the energy consumption of the hydraulic system of the hydraulic clamping mechanism.

[0048] Specifically, in one embodiment of the invention, Figure 1-Figure 5 As shown, the force-enhancing force-sealed hydraulic clamping mechanism includes: an expansion ring 1, a pair of fixed rings, and a friction ring 7. The expansion ring 1 includes a main ring 11, a side ring 12, and a clamp ring 14. The main ring 11, the side ring 12, and the clamp ring 14 are coaxial. There is a pair of side rings 12 and clamp ring 14, and they are symmetrically distributed on both sides of the main ring 11. The inner side of the side ring 12 (the inner side refers to the inner circumferential surface, and the outer side refers to the outer circumferential surface, the same below) is sealed and fixedly connected with the outer side of the clamp ring 14 and the main ring 11. Preferably, the main ring 11, the side ring 12, and the clamp ring 14 are integrally formed. Such a design is convenient for the production and manufacturing of the expansion ring 1 and reduces the production cost, and can also make the annular oil chamber 13 have good sealing performance. It should be noted that in this embodiment, the integrally formed expansion ring 1 is made of spring steel, and the expansion ring 1 has the ability to expand and rebound after the hydraulic oil is injected into the annular oil chamber 13.

[0049] In this embodiment, if Figure 3 and Figure 5 As shown, a pair of clamping rings 14 define an annular groove 15 on the inner side of the main ring 11, and the side ring 12 is spaced apart from the main ring 11. With this design, after the fixing ring is sealedly connected to the side ring 12 and the main ring 11, an annular oil chamber 13 can be defined between the side ring 12 and the main ring 11.

[0050] In this embodiment, if Figure 1-Figure 5 As shown, a pair of fixing rings are located outside a pair of side rings 12, and a pair of fixing rings are arranged on both sides of the main ring 11, and are detachably sealed and fixedly connected to the main ring 11 and the side ring 12, for example Figure 3 A sealing ring 1 4 is sandwiched between the pair of fixed rings and the pair of side rings 12, and a sealing ring 2 5 is sandwiched between the pair of fixed rings and the main ring 11. The sealing ring 1 4 and the sealing ring 2 5 are both made of rubber, so that a closed annular oil cavity 13 is defined between the main ring 11 and the side ring 12. The fixed ring is provided with an oil inlet hole 8 and an oil outlet hole 9 connected to the annular oil cavity 13. Specifically, as shown in FIG. Figure 3 As shown, a pair of fixing rings are respectively marked as fixing ring 1 2 and fixing ring 2 3 , and an oil inlet hole 8 and an oil outlet hole 9 are arranged on fixing ring 2 3 .

[0051] In this embodiment, if Figure 3 As shown, the main ring 11 is provided with two communicating holes 16 , the annular oil chambers 13 on both sides of the main ring 11 are connected through the communicating holes 16 , and the oil inlet hole 8 and the oil outlet hole 9 are respectively connected with one communicating hole 16 .

[0052] In this embodiment, if Figure 3 As shown, in order to facilitate the communication between the oil inlet hole 8, the oil outlet hole 9 and the annular oil chamber 13, a connecting hole 2 32 is provided on the fixed ring 2 3, and the oil inlet hole 8 and the oil outlet hole 9 are connected with the connecting hole 16 and the annular oil chamber 13 defined by the fixed ring 2 3 through the connecting hole 2 32. With this design, it is only necessary to process the connecting hole 2 32 on the fixed ring 2 3 to realize the communication between the oil inlet hole 8, the oil outlet hole 9 and the annular oil chamber 13 and the connecting hole 16. Furthermore, in order to facilitate the processing of the connecting hole 2 32, drilling can be performed from the outer circumferential surface of the fixed ring 2 3. At this time, one end of the connecting hole 2 32 is located on the outer circumferential surface of the fixed ring 2 3, and the end of the connecting hole 2 32 is detachably sealed and plugged with a plug 33 to prevent oil leakage from the end of the connecting hole 2 32. A connecting groove 21 is provided on the fixed ring 2, and the annular oil chamber 13 defined by the fixed ring 2 is connected with the connecting hole 16 through the connecting groove 21.

[0053] In this embodiment, if Figure 1-Figure 5 As shown, the friction ring 7 is movably installed in the annular groove 15, and the friction ring 7 can at least rotate in the annular groove 15.

[0054] The working principle of the force-enhancing force-sealed hydraulic clamping mechanism of this embodiment is as follows: hydraulic oil is injected into the annular oil chamber 13 through the oil inlet hole 8 to expand the annular oil chamber 13. When injecting hydraulic oil, the oil outlet hole 9 needs to be blocked after the air in the annular oil chamber 13 is exhausted. The expansion of the annular oil chamber 13 drives the side ring 12 to swing away from the main ring 11, such as Figure 3As shown by the middle arrow, the side ring 12 swings away from the main ring 11 to drive the clamping ring 14 to swing closer to the friction ring 7 to clamp and fix the friction ring 7 in the annular groove 15. The annular oil chamber 13, the side ring 12, and the clamping ring 14 are arranged around the friction ring 7, so the forces acting on the friction ring 7 are balanced with each other and offset inside the clamping ring 14, and the force acting on the outside is zero, and no additional force will be applied to the friction ring 7 at the moment of clamping the friction ring 7, thereby playing a role of force sealing and forming a force sealing structure. The position accuracy of the friction ring 7 does not change, thereby ensuring the processing accuracy of the CNC machine tool; and the annular oil chamber 13 is sealed by the sealing ring 14 and the sealing ring 2 5. The annular oil chamber 13 has a small volume, a small expansion amount, and a small deformation amount of the side ring 12, which is beneficial to reducing the energy consumption of the hydraulic system and improving the response speed. In addition, the sealing ring 1 4 and the sealing ring 2 5 themselves have a certain elasticity, so the side ring 12 The small deformation makes the sealing ring 1 4 and the sealing ring 2 5 almost in a static sealing state, and the sealing effect is much better than the dynamic sealing, the sealing performance is good, and the hydraulic oil is not easy to leak; the most important thing is that the annular oil chamber 13 expands and uses the force arm structure composed of the side ring 12 and the clamping ring 14 to clamp and fix the friction ring 7, and the hydraulic oil in the annular oil chamber 13 is unloaded, and the side ring 12 and the clamping ring 14 rebound and reset, and the clamping of the friction ring 7 is released. In the force arm structure composed of the side ring 12 and the clamping ring 14, the difference between the inner and outer diameters of the side ring 12 is greater than the difference between the inner and outer diameters of the clamping ring 14, that is, the force arm where the clamping ring 14 is located is shorter, and the force arm where the side ring 12 is located is longer, so it plays a role of increasing force, so that using a smaller hydraulic pressure to push the side ring 12 to swing can make the clamping ring 14 generate a large clamping force on the friction ring 7, and the friction ring 7 is firmly clamped and fixed. The design of the force arm structure is conducive to reducing the energy consumption of the hydraulic system of the hydraulic clamping mechanism.

[0055] In addition, the present invention also proposes a five-axis swing head clamping system, such as Figure 6 As shown, it includes an A / C housing 109, a spindle housing 111, a spindle 110 and any of the aforementioned force-enhancing force-sealed hydraulic clamping mechanisms, wherein an A-axis core shaft 102 is rotatably installed in the A / C housing 109, the A-axis core shaft 102 is fixedly connected to the spindle housing 111, and the spindle 110 is installed on the spindle housing 111.

[0056] Specifically, Figure 6As shown, a bearing seat 105 is fixedly installed in the A / C housing 109 by means of a screw 3 108, and the A-axis core shaft 102 is rotatably installed on the bearing seat 105 by means of a bearing 104. A sealing ring 3 112 is sandwiched between the bearing seat 105 and the A-axis core shaft 102. The sealing ring 3 112 is coaxial with the A-axis core shaft 102, and the sealing ring 3 112 is detachably fixedly connected to the bearing seat 105, and is slidably connected to the outer circumferential surface of the A-axis core shaft 102. The sealing ring 3 112 is made of rubber, and a dynamic seal is performed between the bearing seat 105 and the A-axis core shaft 102 by means of the sealing ring 3 112 to prevent external dust and other debris from invading the A / C housing 109. / C box 109, the friction ring 7 is coaxially fixedly connected with the A-axis core shaft 102, the fixing ring is fixedly connected with the bearing seat 105 by a screw 100, and the fixing ring and the main ring 11 are provided with a mounting hole 6 for the screw 100 to penetrate. Because there is no additional force on the friction ring 7 at the moment when the clamping ring 14 clamps the friction ring 7, it plays a role of force sealing and forms a force sealing structure. Therefore, the position accuracy of the friction ring 7 does not change at the moment when the clamping ring 14 clamps the friction ring 7. Correspondingly, the position accuracy of the A-axis core shaft 102, the spindle box 111 and the spindle 110 will not change, thereby ensuring the machining accuracy of the CNC machine tool.

[0057] Further, such as Figure 6 As shown, the friction ring 7 is fixedly connected to the A-axis core shaft 102 by means of a second screw 101, and a second mounting hole 71 is provided on the friction ring 7 for the second screw 101 to penetrate. An adjusting ring 103 is clamped between the friction ring 7 and the A-axis core shaft 102, and the adjusting ring 103 is coaxial with the friction ring 7. Turning the second screw 101 drives the friction ring 7 to move axially and extrude the adjusting ring 103. The adjusting ring 103 is made of elastic material. With such a design, when assembling the force-enhancing force-sealed hydraulic clamping mechanism, the extrusion force of the friction ring 7 on the adjusting ring 103 can be flexibly adjusted according to the position of the expansion ring 1, so that the friction ring 7 can be in the middle of the annular groove 15 and the distance from the friction ring 7 to the clamping rings 14 on both sides is equal. At the same time, the friction ring 7 is still reliably fixedly connected to the A-axis core shaft 102 by means of the second screw 101, and the second screw 101 is always in a tightened state.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A force-enhancing force-sealed hydraulic clamping mechanism, characterized in that: include: An expansion ring, the expansion ring comprising a main ring, a side ring and a clamp ring, the main ring, the side ring and the clamp ring are coaxial, the side ring and the clamp ring are in a pair and are symmetrically distributed on both sides of the main ring, the inner side of the side ring is sealed and fixedly connected to the outer side of the clamp ring and the main ring, a pair of clamp rings define an annular groove on the inner side of the main ring, and the side ring is spaced apart from the main ring; A pair of fixed rings, located outside the pair of side rings, and the pair of fixed rings are arranged on both sides of the main ring, and are detachably sealed and fixedly connected with the main ring and the side rings, so that a closed annular oil cavity is defined between the main ring and the side rings, and the fixed rings are provided with an oil inlet hole and an oil outlet hole connected to the annular oil cavity; The friction ring is movably installed in the annular groove one. Hydraulic oil is injected into the annular oil chamber to expand the annular oil chamber to drive the side ring to swing away from the main ring. The swing of the side ring away from the main ring drives the clamping ring to swing closer to the friction ring to clamp and fix the friction ring in the annular groove one.

2. A force-enhancing force-sealed hydraulic clamping mechanism as claimed in claim 1, characterized in that: The main ring, side ring and clamp ring are integrally formed.

3. A force-enhancing force-sealed hydraulic clamping mechanism as claimed in claim 1, characterized in that: The difference between the inner and outer diameters of the side ring is greater than the difference between the inner and outer diameters of the clamp ring.

4. A force-enhancing force-sealed hydraulic clamping mechanism as claimed in claim 1, characterized in that: A sealing ring 1 is sandwiched between the pair of fixing rings and the pair of side rings; A sealing ring 2 is sandwiched between a pair of fixing rings and the main ring.

5. A force-enhancing force-sealed hydraulic clamping mechanism as claimed in claim 1, characterized in that: The main ring is provided with two communicating holes 1, and the annular oil chambers on both sides of the main ring are connected through the communicating holes 1; The oil inlet hole and the oil outlet hole are respectively connected with a connecting hole.

6. A force-enhancing force-sealed hydraulic clamping mechanism as claimed in claim 5, characterized in that: One of the fixing rings is provided with a second connecting hole, the oil inlet hole, and the oil outlet hole, and the oil inlet hole and the oil outlet hole are connected with the first connecting hole and the annular oil cavity defined by the fixing ring through the second connecting hole; One end of the second communicating hole is located on the outer circumferential surface of the fixing ring, and a plug is detachably sealed and plugged into the end of the second communicating hole; A communicating groove is arranged on the other fixed ring, and the annular oil cavity defined by the fixed ring is communicated with the communicating hole 1 through the communicating groove.

7. A five-axis swing head clamping system, characterized in that: It comprises an A / C housing, a spindle housing, a spindle and a force-enhancing force-sealed hydraulic clamping mechanism according to any one of claims 1 to 6, wherein an A-axis core shaft is rotatably mounted in the A / C housing, the A-axis core shaft is fixedly connected to the spindle housing, and the spindle is mounted on the spindle housing.

8. The five-axis swing head clamping system according to claim 7, characterized in that: A bearing seat is fixedly installed in the A / C housing, the A-axis core shaft is rotatably installed on the bearing seat through a bearing, the friction ring is coaxially fixedly connected to the A-axis core shaft, and the fixing ring is fixedly connected to the bearing seat.

9. The five-axis swing head clamping system according to claim 8, characterized in that: The friction ring is fixedly connected to the A-axis core shaft by screw 2, and an adjustment ring is sandwiched between the friction ring and the A-axis core shaft. Turning screw 2 drives the friction ring to move axially to extrude the adjustment ring, and the adjustment ring is made of elastic material.

10. The five-axis swing head clamping system according to claim 8, characterized in that: A sealing ring three is sandwiched between the bearing seat and the A-axis core shaft. The sealing ring three is coaxial with the A-axis core shaft. The sealing ring three is detachably fixedly connected to the bearing seat and is slidably connected to the outer circumferential surface of the A-axis core shaft.

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