A chuck

Abstract

The present invention discloses a chuck, which relates to the field of mechanical processing, and includes a support shaft, a top plate, and a top plate adjustment mechanism. The chuck is essentially a universal chuck with adjustable preload, wherein the universal adjustment of the top plate is achieved based on the gap between the support shaft screw and the top plate and the multi-point support structure of the piston shaft. Specifically, the top plate is driven to perform universal rotation around the outer convex spherical surface of the support shaft screw by passing a fluid source into the piston cylinder. At the same time, the pressing force of the piston shaft on the top plate is increased; in the present invention, the preload force of the top plate is specifically adjusted by the elastic member and the fluid source pressure. It can be seen that the chuck of the present invention has a compact structure and an ingenious design. It can not only compensate for the position accuracy between the valve seat sealing surface and the spherical surface of the sphere by universal adjustment of the top plate, but also increase the preload force of the top plate on the valve seat by filling the fluid source, thereby ensuring that the valve seat sealing surface is always pressed against the spherical surface of the sphere in real time, thereby ensuring the grinding effect and grinding accuracy.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, in particular to a chuck. Background Art

[0002] When grinding the sealing surfaces of the ball and valve seat, the sealing surface (spherical surface) of the valve seat needs to always fit on the spherical surface of the ball (valve core) to achieve the grinding purpose.

[0003] An increasing number of manufacturers are adopting automated ball and seat grinding equipment. This equipment secures the ball to a horizontal or vertical rotary table, the valve seat to a chuck, and the chuck to a manipulator or drive shaft via a collet. Because the manipulator or drive shaft operates on a fixed trajectory, while the sealing surface dimensions of the ball and valve seat fluctuate within design tolerances, existing grinding equipment cannot guarantee that the valve seat sealing surface consistently adheres to the spherical surface of the ball (valve core) during the grinding process, resulting in low grinding precision and poor results.

[0004] Therefore, there is an urgent need for a chuck that can always press the valve seat sealing surface against the spherical surface of the sphere (valve core) during the grinding process to overcome the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a chuck to solve the problem that the sealing surface size of the ball and the valve seat is a floating value within the design tolerance, but the existing grinding equipment cannot ensure that the valve seat sealing surface always fits the spherical surface of the ball (valve core) during the grinding process, resulting in low grinding accuracy and poor effect.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a chuck, comprising:

[0008] A support shaft, wherein the end surface of the first axial end of the support shaft is configured as an outwardly convex spherical surface;

[0009] A top plate for mounting a chuck; a spherical groove adapted to the outer convex spherical surface is provided on the side of the top plate; the top plate is connected to the support shaft via a support shaft screw so that the spherical groove cooperates with the outer convex spherical surface; the support shaft screw is provided through the top plate, and a gap is reserved between the top plate and the support shaft screw to allow the top plate to move radially and axially relative to the support shaft screw;

[0010] A top plate adjustment mechanism, the top plate adjustment mechanism includes a cylinder body, a top plate direction adjustment assembly and a top plate preload adjustment assembly, the axial second end of the support shaft is connected to the cylinder body, and the cylinder body is used to be connected to the manipulator or transmission shaft of the grinding equipment; the top plate direction adjustment assembly includes a plurality of piston shafts, the cylinder body is provided with a plurality of piston cylinders, and the piston cylinders are distributed on the outer circumference of the support shaft, a piston shaft is slidably installed in any of the piston cylinders, the end of any of the piston shafts close to the top plate extends out of the piston cylinder and is connected to the top plate, and the end of any of the piston shafts away from the top plate is connected to the piston cylinder through an elastic member; the top plate preload adjustment assembly includes a fluid pipeline, the inlet of the fluid pipeline is used to be connected to a fluid source, and any of the piston cylinders is connected to the outlet of the fluid pipeline, and the fluid pipeline is used to introduce fluid into the piston cylinder so that the piston shaft moves axially under the action of the fluid pressure to adjust the degree of fit between the sealing surface of the valve seat on the chuck and the spherical surface of the sphere.

[0011] Optionally, the cylinder includes:

[0012] A cylinder body, wherein the first axial end of the cylinder body is connected to the second axial end of the support shaft, and the cylinder body is provided with a plurality of cylinder barrels parallel to the axial direction of the cylinder body, and both ends of any of the cylinder barrels are arranged through the axial ends of the cylinder body;

[0013] An end cover is provided at the second axial end of the cylinder body to seal one axial end of any one of the cylinder barrels to form the piston cylinder; and the elastic member in any one of the piston cylinders is connected to the end cover.

[0014] Optionally, the fluid source is a compressed gas source; the fluid pipeline includes a main channel and a branch channel, the main channel is opened in the end cover; the branch channel is opened on the end face of the second axial end of the cylinder body, each of the piston cylinders is connected to one of the branch channels, and all the branch channels are connected to the fluid pipeline after intersection.

[0015] Optionally, the end cover is fixed to the second axial end of the cylinder body by screws, and an annular sealing ring is provided between the end cover and the cylinder body, and any one of the piston cylinders and any one of the branch flow channels are located in the inner ring of the annular sealing ring.

[0016] Optionally, the end cover is provided with a pipe joint connected to the main channel, and the pipe joint is used to connect to the compressed gas source.

[0017] Optionally, a support shaft mounting hole is opened in the center of the end face of the axial first end of the cylinder body, and a support shaft step is provided at the axial second end of the support shaft. The axial second end of the support shaft is inserted into the support shaft mounting hole, and the support shaft step is pressed by a support shaft pressure plate, and the support shaft pressure plate is connected to the cylinder body by screws.

[0018] Optionally, three piston cylinders are provided on the cylinder body, and the three piston cylinders are evenly distributed on the periphery of the support shaft.

[0019] Optionally, the end face of any one of the piston shafts close to the top plate is set as a spherical end face, and the side of the top plate where the spherical concave surface is set is provided with grooves with the same number as the piston shafts, and the grooves are arranged in a one-to-one correspondence with the piston shafts, and the piston shafts are plugged into the corresponding grooves, and the top of the spherical end face of the piston shaft is abutted against the bottom of the groove, and an annular offset swing gap is left between the annular side wall of the groove and the outer wall of the piston shaft.

[0020] Optionally, three groups of connecting parts for mounting the chuck are provided on the side of the top plate facing away from the spherical groove, and any group of the connecting parts includes three connecting flanges evenly distributed along the circumference, and the three groups of connecting flanges are respectively located on different concentric rings.

[0021] Optionally, a sealing ring and a guide wear-resistant ring are provided between the outer wall of any one of the piston shafts and the inner wall of the corresponding cylinder barrel of the piston cylinder, and a muffler is provided on any one of the piston cylinders.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The chuck proposed by the present invention is essentially a universal chuck with adjustable preload, wherein the universal adjustment of the top plate is achieved based on the gap between the support shaft screw and the top plate and the multi-point support structure of the piston shaft. Specifically, the top plate is driven to perform universal rotation around the outer convex spherical surface of the support shaft screw by passing a fluid source into the piston cylinder. At the same time, the pressing force of the piston shaft on the top plate is increased. In the present invention, the preload force of the top plate is adjusted jointly by the elastic member and the fluid source pressure. It can be seen that the chuck of the present invention has a compact structure and an ingenious design. It can not only compensate for the position accuracy between the valve seat sealing surface and the spherical surface of the sphere by universal adjustment of the top plate, but also increase the preload force of the top plate on the valve seat by filling the fluid source, thereby ensuring that the valve seat sealing surface is always pressed against the spherical surface of the sphere in real time, thereby ensuring the grinding effect and grinding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0025] Figure 1 This is a schematic diagram of the overall structure of the chuck disclosed in an embodiment of the present invention;

[0026] Figure 2 A first axial side view of a chuck disclosed in an embodiment of the present invention;

[0027] Figure 3 A second axial side view of the chuck disclosed in the embodiment of the present invention;

[0028] Figure 4 An axial cross-sectional view of a chuck disclosed in an embodiment of the present invention;

[0029] Figure 5 for Figure 4 Schematic diagram of the enlarged structure at A in the middle;

[0030] Figure 6 for Figure 4 Schematic diagram of the enlarged structure at B in the middle;

[0031] Figure 7 This is a schematic structural diagram of the cylinder body in the chuck disclosed in an embodiment of the present invention;

[0032] Figure 8 This is an axial cross-sectional view of the cylinder body disclosed in an embodiment of the present invention.

[0033] Wherein, the accompanying drawings are marked as follows:

[0034] 100, chuck;

[0035] 1. Support shaft; 1-1. Outer convex spherical surface; 2. Top plate; 2-1. Groove; 3. Support shaft screw; 4. Floating gap; 5. Piston shaft; 5-1. Spherical end face; 6. Piston cylinder; 6-1. Cylinder barrel; 7. Elastic part; 8. Cylinder body; 9. End cover; 10. Main flow channel; 11. Branch flow channel; 12. Screw; 13. Annular sealing ring; 14. Sealing ring mounting groove; 15. Pipe joint; 16. Support shaft pressure plate; 17. Screw; 18. Offset swing gap; 19. Connecting flange; 20. Sealing ring; 21. Guide wear-resistant ring; 22. Muffler; 23. Dustproof sealing ring. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0037] One of the purposes of the present invention is to provide a chuck to solve the problem that the sealing surface size of the ball and the valve seat is a floating value within the design tolerance, but the existing grinding equipment cannot ensure that the valve seat sealing surface always fits the spherical surface of the ball (valve core) during the grinding process, resulting in low grinding accuracy and poor effect.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] like Figures 1 to 8 As shown, this embodiment provides a chuck 100, which mainly includes a support shaft 1, a top plate 2 and a top plate adjustment mechanism. The end face of the axial first end of the support shaft 1 is set as an outer convex spherical surface 1-1, and the top plate 2 is used to install the chuck. One side of the top plate 2 is provided with a spherical groove adapted to the outer convex spherical surface 1-1. The top plate 2 is set at the axial first end of the support shaft 1 and is connected to the support shaft 1 through a support shaft screw 3 so that the spherical groove of the top plate 2 cooperates with the outer convex spherical surface 1-1. The support shaft screw 3 is set through the top plate 2, and a gap is reserved between the inner wall of the through hole of the top plate 2 and the outer wall of the head of the support shaft screw 3 to allow the top plate 2 to move radially and axially relative to the support shaft screw 3, that is, Figure 6The floating gap 4 shown is so that the top plate 2 can move arbitrarily within the range of the floating gap 4. The top plate adjustment mechanism includes a cylinder body, a top plate direction adjustment component and a top plate preload adjustment component. The second axial end of the support shaft 1 is connected to the cylinder body, and the cylinder body is used to be connected to the manipulator or transmission shaft of the grinding equipment; the top plate direction adjustment component includes a plurality of piston shafts 5, and a plurality of piston cylinders 6 are opened on the cylinder body, and the piston cylinders 6 are distributed on the outer periphery of the support shaft 1. A piston shaft 5 is slidably installed in any piston cylinder 6, and the end of any piston shaft 5 close to the top plate 2 extends out of the piston cylinder 6 and is connected to the top plate 2 (generally in contact but not connected), and the end of any piston shaft 5 away from the top plate 2 They are all connected to the piston cylinder 6 through an elastic member 7; the top plate preload adjustment assembly includes a fluid pipeline, the inlet of the fluid pipeline is used to be connected to the fluid source, and any piston cylinder 6 is connected to the outlet of the fluid pipeline, and the fluid pipeline is used to introduce fluid into the piston cylinder 6 so that the piston shaft 5 can move axially under the action of fluid pressure to adjust the preload force of the top plate 2 and the chuck connected thereto, thereby achieving the effect of adjusting the degree of fit between the sealing surface of the valve seat on the chuck and the spherical surface of the sphere. One of the purposes of this scheme is to keep the sealing surface of the valve seat and the spherical surface of the sphere pressed tightly during the grinding process.

[0041] In this embodiment, the above-mentioned cylinder body specifically includes a cylinder body 8 and an end cover 9. The axial first end of the cylinder body 8 is connected to the axial second end of the support shaft 1. The cylinder body 8 is provided with a plurality of cylinder barrels 6-1 parallel to the axial direction of the cylinder body 8. Both ends of any cylinder barrel 6-1 are arranged through the axial ends of the cylinder body 8; the end cover 9 is arranged at the axial second end of the cylinder body 8 to seal one axial end of any cylinder barrel 6-1, that is, the end away from the top plate 2, to form a piston cylinder 6 with one end open and the other end closed; the elastic member 7 in any piston cylinder 6 is connected to the end cover 9. As a preferred embodiment, the cylinder body 8 of this embodiment is a cylindrical cylinder body, the end cover 9 and the top plate 2 are both thin cylindrical, the end cover 9, the top plate 2 and the cylinder body 8 have the same diameter, and the end cover 9, the top plate 2, the cylinder body 8 and the support shaft 1 are preferably coaxially arranged. As Figure 1 As shown, the end cover 9 and the top plate 2 are respectively located at the axial ends of the cylinder body 8.

[0042] In this embodiment, the above-mentioned fluid source can be a gas source or a liquid source. When the fluid source is a gas source, the piston shaft 5 and the piston cylinder 6 form a cylinder structure, and if the fluid source is a liquid source, the piston shaft 5 and the piston cylinder 6 form a hydraulic cylinder structure. As a preferred embodiment, the fluid source is set as a gas source in this embodiment, and further, it can be a compressed gas source. The compressed gas source includes components such as gas cylinders, connecting pipes and air pumps, which are existing components and are not described here. Correspondingly, the fluid pipeline is an air flow pipeline for the flow of compressed gas, which specifically includes a main channel 10 and a branch channel 11. The main channel 10 is opened in the end cover 9, and the branch channel 11 is opened on the end face of the second axial end of the cylinder body 8, that is, on the end face of the cylinder body 8 close to the end cover 9. The cylinder barrel 6-1 of each piston cylinder 6 is respectively connected to one end of a branch channel 11, and the other ends of all branch channels 11 intersect, such as Figure 7 As shown, after the end cover 9 is installed, the main channel 10 on the end cover 9 will be connected to the intersection of the branch channels 11. After the compressed air source flows through the main channel 10 to the intersection of the branch channels 11, it is dispersed into each cylinder 6-1 through the branch channels 11 to act on the piston shaft 5.

[0043] Furthermore, as a preferred embodiment, the above-mentioned main channel 10 can be set as an "L"-shaped main channel, the long side of which is arranged along the radial direction of the cylindrical end cover 9, and the short side is arranged along the central axis of the cylindrical end cover 9, and is arranged through the end face of the end cover 9 close to the cylinder body 8.

[0044] In this embodiment, the end cover 9 can be fixed to the axial second end of the cylinder body 8 by a plurality of screws 12, such as three screws 12, and the three screws 12 are evenly distributed along the circumferential direction. Figure 7 As shown, the branch flow channel 11 is a semi-tube structure, which does not form a closed circumference, but a semicircular channel structure. In order to avoid air leakage, an annular sealing ring 13 can be provided between the end cover 9 and the cylinder body 8, and any piston cylinder 6 and any branch flow channel 11 are located in the inner ring of the annular sealing ring 13 to avoid leakage when the compressed gas source injects gas into the piston cylinder 6. As a preferred solution, a sealing ring mounting groove 14 can be provided at the second axial end of the cylinder body 8, that is, on the end face of the cylinder body 8 close to the end cover 9. The sealing ring mounting groove 14 is a closed-loop structure, and any piston cylinder 6 and any branch flow channel 11 are located in the inner ring of the sealing ring mounting groove 14. The annular sealing ring 13 is embedded in the sealing ring mounting groove 14. When the end cover 9 and the cylinder body 8 are connected by screws 12, the annular sealing ring 13 will be squeezed and deformed, thereby forming an end cover sealing structure between the end cover 9 and the cylinder body 8.

[0045] In this embodiment, the end cap 9 is provided with a pipe joint 15 that communicates with the main channel 10. This pipe joint 15 is located on the outer surface of the end cap 9 and is connected to the long side of the main channel 10. This allows connection to a compressed gas source when the clamping force of the top plate 2 needs to be adjusted. This pipe joint 15 is preferably a GB / T3754.1-1983 ferrule-type butt-end straight-through pipe joint G256.

[0046] In this embodiment, the axial first end of the cylinder body 8, that is, the center of the end surface close to the top plate 2, is provided with a support shaft mounting hole coaxial therewith, and the axial second end of the support shaft 1 is provided with a support shaft step, and the axial second end of the support shaft 1, that is, the end close to the cylinder body 8, is inserted into the support shaft mounting hole, and after the support shaft step is pressed by the support shaft pressure plate 16, the support shaft pressure plate 16 is fixed to the step end surface of the support shaft mounting hole by the screw 17, as shown in FIG. Figure 4 shown.

[0047] In this embodiment, the cylinder body 8 is preferably provided with three piston cylinders 6, and the three piston cylinders 6 are evenly distributed on the periphery of the support shaft 1. Figure 7 As shown, three branch flow channels 11 are correspondingly provided and are respectively connected to the three cylinders 6 - 1 .

[0048] In this embodiment, the end surface of any piston shaft 5 close to the top plate 2 is set as a spherical end surface 5-1, and the side surface of the top plate 2 provided with the spherical concave surface is further provided with grooves 2-1 with the same number as the piston shaft 5. The grooves 2-1 are provided in a one-to-one correspondence with the piston shaft 5, and the piston shaft 5 is plugged into the corresponding groove 2-1. The groove 2-1 is a cylindrical groove with a flat bottom and a cylindrical side wall. Figure 5 As shown, the top of the spherical end surface 5 - 1 of the piston shaft 5 abuts against the bottom of the groove 2 - 1 , and an annular offset swing gap 18 is left between the annular side wall of the groove 2 - 1 and the outer wall of the piston shaft 5 .

[0049] In this embodiment, a connection piece for mounting a chuck is provided on the side of the top plate 2 that is away from the spherical groove, i.e., the side away from the cylinder body 8. The chuck is generally a three-jaw chuck to clamp the valve seat. Based on the structure of the three-jaw chuck, the connection piece can be provided as three connection flanges 19 evenly distributed along the circumference, such as Figure 1 and Figure 2 As shown, in order to adapt to three-jaw chucks of different specifications, three sets of connecting parts can be set on the side of the top plate 2 away from its spherical groove. The three connecting flanges 19 of each set of connecting parts are evenly distributed around the circumference. The connecting flanges 19 of the three sets of connecting parts are respectively located on three different circular rings. The three circular rings form a concentric circular ring structure with the support shaft screw 3 as the center. As a further preferred solution, Figure 2As shown, a reference line is set at every 120° central angle with the support shaft screw 3 as the center of the circle, and the three connecting flanges 19 of each group of connecting parts are respectively set on the three reference lines.

[0050] In this embodiment, a connector for connecting to a manipulator or a drive shaft is provided on the side of the end cap 9 away from the cylinder body 8. This connector may also be a connecting flange 19. As a preferred embodiment, three connecting flanges 19 may be provided on the side of the end cap 9 away from the cylinder body 8, and the three connecting flanges 19 may be evenly distributed around the circumference.

[0051] In this embodiment, a sealing ring 20 and a guide wear-resistant ring 21 are provided between the outer wall of each piston shaft 5 and the inner wall of the corresponding cylinder barrel 6-1 of the piston cylinder 6. The sealing ring 20 is preferably an O-ring, embedded in a sealing ring groove on the outer wall of the piston shaft 5, while the guide wear-resistant ring 21 is embedded in a groove on the inner wall of the cylinder barrel 6-1. Preferably, the guide wear-resistant ring 21 is provided at the cylinder mouth of the piston cylinder 6, and the sealing ring 20 is provided at the end of the piston shaft 5 away from the top plate 2. The provision of the sealing ring 20 creates a closed air cavity between the end of the piston shaft 5 away from the top plate 2 and the bottom of the piston cylinder 6. This closed air cavity communicates with the aforementioned branch flow channel 11, thereby adjusting the axial movement of the piston shaft 5 by changing the volume of this closed air cavity. Preferably, this embodiment may also include a dustproof sealing ring 23 at the cylinder mouth of the piston cylinder 6 to ensure that the interior of the piston cylinder 6 remains clean during movement of the piston shaft 5 and prevent dust from entering the piston cylinder 6. The dustproof sealing ring 23 may be an A-type rubber dustproof sealing ring.

[0052] In this embodiment, each piston cylinder 6 is equipped with a muffler 22. The muffler 22 is disposed on the outer wall of the cylinder body 8 and communicates with the interior of the piston cylinder 6. The muffler 22 is a conventional noise reduction device that reduces the noise generated when the compressed air source inflates the piston cylinder 6.

[0053] In this embodiment, the screws 12 and 17 used are preferably hexagon socket head screws.

[0054] The working principle of the chuck 100 of this embodiment is described in detail below. The elastic member 7 is preferably a cylinder spring, and specifically a cylindrical helical compression spring such as Figure 4 As shown, in actual operation, the cylindrical helical compression spring is placed between the piston shaft 5 and the end cover 9 in a compressed state, and the two ends of the cylindrical helical compression spring are respectively abutted against or connected to the tail of the piston shaft 5 and the end cover 9.

[0055] The chuck 100 is specifically a universal chuck with adjustable preload, which is essentially a flexible chuck. In the structure of the chuck 100, the top plate 2 contacts the spherical end surface 5-1 of the piston shaft 5, and the three piston shafts 5 are respectively supported by three cylinder springs (cylindrical helical compression springs) so that the spherical end surface 5-1 can always fit (contact) with the bottom end surface of the groove on the top plate 2 under the action of the springs, so that the top plate 2 can swing universally with the convex spherical surface of the support shaft screw 3 as the center within the design range, while having a suitable preload. Generally, the elastic force of the cylinder spring (cylindrical helical compression spring) is relatively small. When a larger preload is required, it is necessary to connect a compressed air source with a filtered pressure reducing valve to the pipe joint 15 on the outer circle of the end cover 9, and apply the air source pressure to the rear end of the piston shaft 5 (the end away from the top plate 2), thereby increasing the preload of the top plate 2 and achieving the effect of adjusting the pressing force between the valve seat sealing surface on the top plate 2 and the spherical surface of the sphere.

[0056] The universal adjustment form of the top plate 2 in the above-mentioned chuck of the present technical solution is realized based on the floating gap 4 between the support shaft screw 3 and the top plate 2 and the three-point support structure of the piston shaft 5. Specifically, the universal adjustment of the top plate 2 is achieved by passing compressed air into the piston cylinder 6. At the same time, the pressing force of the piston shaft 5 on the top plate 2 is increased. In actual operation, the pre-tightening force of the top plate 2 is achieved by jointly adjusting the pressure of the cylinder spring (cylindrical helical compression spring) and the compressed air. The chuck 100 of the present technical solution can not only compensate for the position accuracy between the valve seat sealing surface and the spherical surface of the sphere through the universal adjustment of the top plate 2, but also increase the pre-tightening force of the top plate on the valve seat by filling compressed air, thereby ensuring in real time that the valve seat sealing surface is always pressed against the spherical surface of the sphere, thereby ensuring the grinding effect and grinding accuracy.

[0057] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0058] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A chuck, characterized in that: include: A support shaft, wherein the end surface of the first axial end of the support shaft is configured as an outwardly convex spherical surface; A top plate for mounting a chuck; a spherical groove adapted to the outer convex spherical surface is provided on the side of the top plate; the top plate is connected to the support shaft via a support shaft screw so that the spherical groove cooperates with the outer convex spherical surface; the support shaft screw is provided through the top plate, and a gap is reserved between the top plate and the support shaft screw to allow the top plate to move radially and axially relative to the support shaft screw; A top plate adjustment mechanism, the top plate adjustment mechanism includes a cylinder body, a top plate direction adjustment assembly and a top plate preload adjustment assembly, the axial second end of the support shaft is connected to the cylinder body, and the cylinder body is used to be connected to the manipulator or transmission shaft of the grinding equipment; the top plate direction adjustment assembly includes a plurality of piston shafts, the cylinder body is provided with a plurality of piston cylinders, and the piston cylinders are distributed on the outer circumference of the support shaft, a piston shaft is slidably installed in any of the piston cylinders, the end of any of the piston shafts close to the top plate extends out of the piston cylinder and is connected to the top plate, and the end of any of the piston shafts away from the top plate is connected to the piston cylinder through an elastic member; the top plate preload adjustment assembly includes a fluid pipeline, the inlet of the fluid pipeline is used to be connected to a fluid source, and any of the piston cylinders is connected to the outlet of the fluid pipeline, and the fluid pipeline is used to introduce fluid into the piston cylinder so that the piston shaft moves axially under the action of the fluid pressure to adjust the degree of fit between the sealing surface of the valve seat on the chuck and the spherical surface of the sphere.

2. The chuck according to claim 1, characterized in that The cylinder body comprises: A cylinder body, wherein the first axial end of the cylinder body is connected to the second axial end of the support shaft, and the cylinder body is provided with a plurality of cylinder barrels parallel to the axial direction of the cylinder body, and both ends of any of the cylinder barrels are arranged through the axial ends of the cylinder body; An end cover is provided at the second axial end of the cylinder body to seal one axial end of any one of the cylinder barrels to form the piston cylinder; and the elastic member in any one of the piston cylinders is connected to the end cover.

3. The chuck according to claim 2, characterized in that The fluid source is a compressed gas source; the fluid pipeline includes a main channel and a branch channel, and the main channel is opened in the end cover; the branch channel is opened on the end surface of the second axial end of the cylinder body, and each of the piston cylinders is connected to a branch channel respectively, and all the branch channels are connected to the fluid pipeline after intersection.

4. The chuck according to claim 3, characterized in that The end cover is fixed to the second axial end of the cylinder body by screws, and an annular sealing ring is provided between the end cover and the cylinder body. Any one of the piston cylinders and any one of the branch flow channels are located in the inner ring of the annular sealing ring.

5. The chuck according to claim 3, characterized in that The end cover is provided with a pipe joint connected to the main channel, and the pipe joint is used to connect to the compressed gas source.

6. The chuck according to any one of claims 2 to 5, characterized in that: A support shaft mounting hole is provided at the center of the end face of the axial first end of the cylinder body, and a support shaft step is provided at the axial second end of the support shaft. The axial second end of the support shaft is inserted into the support shaft mounting hole, and the support shaft step is pressed by a support shaft pressure plate, and the support shaft pressure plate is connected to the cylinder body by screws.

7. The chuck according to claim 6, characterized in that The cylinder body is provided with three piston cylinders, and the three piston cylinders are evenly distributed on the periphery of the support shaft.

8. The chuck according to any one of claims 1 to 5, characterized in that: The end face of any one of the piston shafts close to the top plate is set as a spherical end face, and the side surface of the top plate where the spherical concave surface is set is provided with grooves with the same number as the piston shafts, and the grooves are arranged in a one-to-one correspondence with the piston shafts. The piston shaft is plugged into the corresponding groove, and the top of the spherical end face of the piston shaft is abutted against the bottom of the groove, and an annular offset swing gap is left between the annular side wall of the groove and the outer wall of the piston shaft.

9. The chuck according to any one of claims 1 to 5, characterized in that: Three groups of connecting parts for mounting the chuck are provided on the side of the top plate away from the spherical groove, and any group of the connecting parts includes three connecting flanges evenly distributed along the circumference, and the three groups of connecting flanges are respectively located on different concentric rings.

10. The chuck according to any one of claims 1 to 5, characterized in that: A sealing ring and a guide wear-resistant ring are provided between the outer wall of any one of the piston shafts and the inner wall of the corresponding cylinder barrel of the piston cylinder, and a muffler is provided on any one of the piston cylinders.

Images