Chuck assembly convenient to install and fix

Abstract

The utility model relates to the technical field of clamping, in particular to a chuck assembly convenient to install and fix, which comprises a chuck main body and a sleeve, the sleeve is provided with a first through hole penetrating through the sleeve, the chuck main body is contained in the first through hole, the sleeve and the chuck main body move back and forth relatively through external acting force, and one end of the chuck main body is provided with a chuck unit. The chuck unit is provided with a plurality of clamping jaws, a gap is formed between every two adjacent clamping jaws, the multiple clamping jaws surround to form a cavity, an external component is contained in the cavity, and when the sleeve and the chuck body move back and forth relatively, the sleeve abuts against or is separated from the clamping jaws, so that the chuck unit shrinks or expands in the radial direction; when the sleeve is pushed relative to the chuck main body, the sleeve extrudes the clamping jaws, so that the chuck unit shrinks in the radial direction, and the multiple clamping jaws clamp an external component; when the sleeve retreats relative to the chuck main body, the sleeve withdraws extrusion on the clamping jaws, so that the chuck units expand in the radial direction, and the multiple clamping jaws loosen the external component; the chuck assembly has the advantage of being fast and convenient to install, fix or disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping, and in particular to a clamping head assembly that is convenient to install and fix. Background Art

[0002] With the continuous development of industrial technology, the requirements for the performance and installation convenience of chuck assemblies are becoming increasingly higher. In existing technologies, the installation and fixing methods of chuck assemblies have many limitations. In the past, the installation of chucks often required precise alignment and a complex adjustment process, which required high skills from the operator and was prone to installation errors. At the same time, the fixing structure of traditional chucks was not stable enough. After long-term use or when subjected to large external forces, it was prone to loosening, thus affecting processing accuracy and production safety. Especially when the installation distance is limited, a chuck assembly that can be easily installed and fixed is even more necessary. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a chuck assembly that is convenient to install and fix, comprising a chuck body and a sleeve. The sleeve is provided with a first through hole that passes through the sleeve, the chuck body is arranged in the first through hole, and the sleeve is in relative reciprocating motion with the chuck body under external force. A chuck unit is provided at one end of the chuck body, the chuck unit has a plurality of jaws, adjacent jaws have gaps, and the plurality of jaws surround a cavity to accommodate an external component. When the sleeve and the chuck body move back and forth relative to each other, the sleeve and the jaws contact or separate, causing the chuck unit to radially contract or expand. When the sleeve is advanced relative to the chuck body, the sleeve squeezes the jaws, causing the chuck unit to radially contract, and the plurality of jaws clamp the external component to achieve the purpose of installation and fixation; when the sleeve is retracted relative to the chuck body, the sleeve withdraws the squeeze on the jaws, causing the chuck unit to radially expand, and the plurality of jaws loosen the external component. The chuck assembly has the advantages of quick and convenient installation, fixation or disassembly.

[0004] Furthermore, the clamping jaws are provided with a contact plane and a contact outer conical surface. The contact plane is used to contact and connect with the plane of the external component. The contact plane and the contact outer conical surface intersect and the intersection section forms an angle α. The sleeve is provided with an end face and a contact inner conical surface intersecting with the end face. The contact inner conical surface is located between the end face and the inner surface of the sleeve. When the sleeve is pushed relative to the chuck body by an external force, the contact inner conical surface and the contact outer conical surface are close to each other. By setting the contact inner conical surface and the contact outer conical surface close to each other, it is beneficial for the sleeve to better squeeze the clamping jaws, thereby achieving multiple clamping jaws to clamp the external component.

[0005] Furthermore, the chuck body has a raised portion located between the two separated ends of the chuck body. The raised portion protrudes from the outer surface of the chuck body and forms a retaining groove with the plurality of jaws. By providing the raised portion, the retaining groove is formed by abutting the outer conical surface, the side of the raised portion closest to the jaws, and the outer surface of the chuck body.

[0006] Furthermore, the sleeve has a protrusion that protrudes from the inner surface of the sleeve and is located at an end that contacts the inner conical surface. The protrusion is received in the retaining groove. By providing the protrusion, the protrusion is restricted in its reciprocating motion within the retaining groove, effectively preventing the sleeve from accidentally falling off the chuck body.

[0007] Furthermore, a conveniently installed and fixed chuck assembly also includes an elastic assembly, which includes a pressing block and a spring member connected to the pressing block at one end. A connecting portion is provided at the end of the chuck body away from the clamping jaws, and the other end of the spring member is connected to the connecting portion. The elastic assembly is used to drive the chuck body to move relative to the sleeve. By providing the elastic assembly, a user can press the pressing block, causing the spring member to push the chuck body relative to the sleeve, thereby moving the clamping jaws and sleeve away from each other, facilitating rapid disassembly of the chuck assembly.

[0008] Furthermore, the chuck body has a threaded portion located between two distal ends of the chuck body, the threaded portion protruding from the outer surface of the chuck body, the threaded portion being an external thread structure, and the sleeve having a threaded groove matching the threaded portion, the threaded groove being recessed in the inner surface of the sleeve, the threaded groove being an internal thread structure, and the chuck body and the sleeve being rotatably connected. The chuck body and the sleeve are threadedly connected to achieve rapid contact or separation between the sleeve and the jaws.

[0009] Furthermore, a conveniently mounted and fixed chuck assembly further includes an outer sleeve, the outer sleeve having a second through hole extending therethrough, the second through hole accommodating the sleeve. The outer sleeve facilitates frictional contact between the user and the sleeve when the user drives the sleeve to move, thus providing practicality.

[0010] Furthermore, the sleeve includes a first sleeve and a second sleeve, which are combined and sleeved on the chuck body. The first sleeve and the second sleeve are accommodated in the second through hole, and the outer sleeve sleeve is sleeved on the first sleeve and the second sleeve, so that the first sleeve and the second sleeve are combined and fixed. The first sleeve and the second sleeve are assembled and combined on the chuck body by installation. The provision of the outer sleeve facilitates the combined fixation of the first sleeve and the second sleeve, and prevents the first sleeve and the second sleeve from accidentally separating and causing the first sleeve and the second sleeve to fall off the chuck body.

[0011] Furthermore, the connection portion is provided with a countersunk hole, recessed from the outer surface of the connection portion and connected to the cavity, with the central axis of the countersunk hole being collinear with the central axis of the cavity. The provision of the countersunk hole and the connection with the cavity facilitate the external component to protrude from the chuck body, preventing the chuck assembly from being restricted to the edge of the external component.

[0012] Furthermore, the value of the angle α formed by the intersection section of the interfering plane and the interfering outer conical surface is 45° to 80°.

[0013] The beneficial effects of the present invention are as follows: the present invention provides a conveniently installed and fixed chuck assembly, comprising a chuck body, a sleeve, a plurality of jaws arranged at one end of the chuck body, and a cavity formed around the inner surfaces of the plurality of jaws. When the sleeve is advanced relative to the chuck body, the sleeve squeezes the jaws, causing the cavity to radially contract, and the plurality of jaws clamp external components to achieve the installation purpose; when the sleeve is retracted relative to the chuck body, the sleeve withdraws the squeezing of the jaws, causing the cavity to radially expand, and the plurality of jaws loosen external components. The chuck assembly has the advantage of being quick and convenient to install or disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA;

[0017] Figure 4 This is a schematic structural diagram of the chuck body and sleeve of the utility model;

[0018] Figure 5 This is an exploded schematic diagram of the utility model;

[0019] Figure 6 This is a structural diagram of the chuck body of the present utility model;

[0020] Figure 7 This is a front view structural diagram of another embodiment of the chuck unit of the present utility model;

[0021] Figure 8 This is a schematic diagram of the three-dimensional structure of another embodiment of the chuck unit of the present utility model;

[0022] Figure 9 for Figure 8 A schematic diagram of the front structure of the embodiment;

[0023] Figure 10 The exploded schematic diagram of the sleeve of the present invention.

[0024] Reference numerals include:

[0025] 1. Chuck body; 2. Sleeve; 3. Chuck unit; 4. Elastic component; 5. Outer kit; 101. Protrusion; 102. Limiting groove; 103. Connecting portion; 104. Threaded portion; 105. Countersunk hole; 106. Knob member; 107. Traveling protrusion; 201. First through hole; 202. End face; 203. Interference inner conical surface; 204. Protruding portion; 205. Threaded groove; 206. First kit; 207. Second kit; 208. Positioning groove; 209. Positioning boss; 210. Traveling groove; 301. Cavity; 302. Interference plane; 303. Interference outer conical surface; 304. Outer interference conical surface; 305. Clamping jaw; 306. Combined section; 401. Pressing block; 402. Spring member; 403. Third through hole; 501. Second through hole. DETAILED DESCRIPTION

[0026] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0027] See also Figures 1 to 10 As shown, the utility model is a chuck assembly that is convenient to install and fix, including a chuck body 1 and a sleeve 2. The sleeve 2 is provided with a first through hole 201 that penetrates the sleeve 2. The chuck body 1 is arranged in the first through hole 201, and the sleeve 2 moves back and forth relative to the chuck body 1 through external force. A chuck unit 3 is provided at one end of the chuck body 1. The chuck unit 3 has a plurality of jaws 305, and there is a gap between adjacent jaws 305. The plurality of jaws 305 are surrounded to form a cavity 301, and the cavity 301 accommodates external components. When the sleeve 2 and the chuck body 1 move back and forth relative to each other, the sleeve 2 and the jaws 305 conflict or separate, so that the chuck unit 3 radially contracts or expands.

[0028] In this embodiment, the chuck unit 3 is provided with three clamping jaws 305, which are connected to a connecting end and are an integrally formed structure. The inner surfaces of the three clamping jaws 305 are arc-shaped surfaces, and the inner surfaces of the three clamping jaws 305 surround the cylindrical cavity 301. In actual use, the chuck assembly is inserted into the external component, and the three clamping jaws 305 surround the external component. The external component is placed in the cavity 301. At this time, the sleeve 2 is pushed forward, and the sleeve 2 squeezes the clamping jaws 305, causing the chuck unit 3 to contract radially. The three clamping jaws 305 clamp the external component, and the chuck assembly is installed and fixed to the external component. When the sleeve 2 is then retracted, the sleeve 2 removes the squeeze on the clamping jaws 305, causing the cavity 301 to expand radially, and the chuck unit 3 returns to its initial state. The three clamping jaws 305 release their grip on the external component, and the chuck assembly can be removed from the external component. The chuck assembly has the advantage of being quick and convenient to install or disassemble.

[0029] Specifically, the clamping jaw 305 is provided with a contact plane 302 and a contact outer conical surface 303. The contact plane 302 is used for contact connection with the plane of the external component. The contact plane 302 intersects with the contact outer conical surface 303 and the intersection section forms an angle α. The sleeve 2 is provided with an end face 202 and a contact inner conical surface 203 intersecting with the end face 202. The contact inner conical surface 203 is located between the end face 202 and the inner surface of the sleeve 2. When the sleeve 2 is pushed relative to the chuck body 1 by external force, the contact inner conical surface 203 and the contact outer conical surface 303 are close to each other. In this embodiment, multiple jaws 305 protrude from the sleeve 2, and the diameter of the maximum cross section of the multiple jaws 305 is greater than the maximum diameter of the first through hole 201. The interference plane 302 is perpendicular to the central axis of the cavity 301. The angle α of the cross section where the interference plane 302 intersects with the interference outer conical surface 303 is an acute angle. The end face 202 is a plane at one end of the sleeve 2 that is flush with the sleeve 2. The angle of the cross section where the interference inner conical surface 203 intersects with the end face 202 is an obtuse angle. The interference inner conical surface 203 is in line contact or surface contact with the interference outer conical surface 303. In actual use, the user sleeves the multiple jaws 305 on the external component and then drives the sleeve 2 forward, so that the sleeve 2 fits and squeezes the multiple jaws 305. At this time, the interference inner conical surface 203 presses the interference outer conical surface 303, causing the multiple jaws 305 to deform and the chuck unit 3 to contract radially, so that the multiple jaws 305 clamp the external component at the same time. By arranging the inner conical surface 203 and the outer conical surface 303 to be in close contact with each other, the sleeve 2 can better squeeze the clamping jaws 305, thereby enabling multiple clamping jaws 305 to clamp external components.

[0030] Also, see Figure 7 As shown, an outer conflicting conical surface 304 can also be provided between the conflicting plane 302 and the conflicting outer conical surface 303. The angle of the cross section where the conflicting plane 302 and the outer conflicting conical surface 304 intersect is an obtuse angle, so that the conflicting plane 302 is narrowed. In this embodiment, the conflicting plane 302 is in conflict with the plane of the movable part on the external component, limiting the movement of the movable part in a single direction relative to the external component of the chuck assembly. When the plane where the movable part is arranged relative to the conflicting plane 302 is a non-flat plane, for example, a concave conical plane on the surface of the movable part, the narrowed conflicting plane 302 can make surface contact with the bottom surface of the concave conical plane, and the outer conflicting conical surface 304 makes the conflicting plane 302 have better compatibility.

[0031] Specifically, the chuck body 1 has a raised portion 101 located between the two separated ends of the chuck body 1. The raised portion 101 protrudes from the outer surface of the chuck body 1 and forms a retaining groove 102 with the multiple jaws 305. In this embodiment, the multiple jaws 305 are integrally formed and connected to a common connection end. The raised portion 101 protrudes from the outer surface at the connection end. The retaining groove 102 is formed by the contact between the outer conical surface 303, the side of the raised portion 101 near the jaws 305, and the side surface of the chuck body 1.

[0032] Specifically, the sleeve 2 has a protrusion 204 that protrudes from the inner surface of the sleeve 2. The protrusion 204 is located at one end that contacts the inner conical surface 203 and is accommodated in the retaining groove 102. In this embodiment, the sleeve 2 is a hollow cylindrical structure. The sleeve 2 and the chuck body 1 are clearance-fitted. The minimum clearance between the sleeve 2 and the chuck body 1 is 0.1 mm, which prevents the sleeve 2 and the chuck body 1 from shaking due to an excessive clearance. The inner surface of the protrusion 204 is a cylindrical structure, and the outer surface of the protrusion 101 is also a cylindrical structure. The inner diameter of the protrusion 204 is smaller than the outer diameter of the protrusion 101. The protrusion 204 is restricted in its reciprocating motion within the retaining groove 102, effectively preventing the sleeve 2 from accidentally falling off the chuck body 1. When the inner conical surface 203 and the outer conical surface 303 are in contact with each other, the distance between the protruding portion 204 and the raised portion 101 is the maximum travel of the sleeve 2 relative to the chuck body 1 .

[0033] Specifically, the chuck body 1 also includes an elastic component 4, which includes a pressing block 401 and a spring member 402 connected to the pressing block 401 at one end. The end of the chuck body 1 away from the clamping jaw 305 is provided with a connecting portion 103, and the other end of the spring member 402 is connected to the connecting portion 103. The elastic component 4 is used to move the chuck body 1 relative to the sleeve 2, so that the inner conical surface 203 of the chuck body 1 is opposed to the outer conical surface 303. In this embodiment, the pressing block 401 protrudes out of the sleeve 2, and the spring member 402 is a metal spring. The connecting portion 103 and the pressing block 401 are both provided with a connecting protrusion for tightening and fixing the inner diameter of the spring portion. During actual production and installation, one end of the spring member 402 is first put on the connecting protrusion of the connecting portion 103, and then the connecting protrusion of the pressing block 401 is inserted into the other end of the spring member 402. During actual use, the user can first fix the sleeve 2, and then press the pressing block 401, so that the spring member 402 pushes the clamping jaw 305 to separate from the sleeve 2, and the inner conical surface 203 is away from the outer conical surface 303, thereby causing the chuck unit 3 to expand radially, so that the chuck assembly can be quickly removed from the external component, which is conducive to the rapid disassembly of the chuck assembly.

[0034] Specifically, the chuck body 1 has a threaded portion 104 located between two distal ends of the chuck body 1 and protruding from the outer surface of the chuck body 1. The threaded portion 104 is an external thread. The sleeve 2 has a threaded groove 205 that matches the threaded portion 104. The threaded groove 205 is recessed from the inner surface of the sleeve 2 and is an internal thread. The chuck body 1 and sleeve 2 are rotatably connected. This embodiment provides another connection method between the chuck body 1 and the sleeve 2. In actual use, the user rotates the sleeve 2 forward, causing the sleeve 2 to contact and squeeze the jaws 305, thereby contacting the inner conical surface 203 and pressing against the outer conical surface 303, thereby radially contracting the chuck unit 3. The user rotates the sleeve 2 backward, causing the sleeve 2 to move away from the jaws 305, moving the inner conical surface 203 away from the outer conical surface 303, thereby radially expanding the chuck unit 3. The chuck body 1 and the sleeve 2 are connected by threads, so that the sleeve 2 and the clamping jaw 305 can be quickly and conveniently brought into contact with or separated from each other.

[0035] Also, see Figure 7 Place Figure 10As shown, the chuck body 1 is provided with a cylindrical travel protrusion 107 extending from the outer surface of the chuck body 1. A travel groove 210 is provided on the second sleeve 207. The travel groove 210 extends through the second sleeve 207 and is obliquely disposed on the curved surface of the second sleeve 207. The travel protrusion 107 is disposed within the travel groove 210. This embodiment represents a third connection method between the chuck body 1 and the sleeve 2. In this embodiment, a knob member 106 is fixedly connected to one end of the chuck body 1 away from the chuck unit 3. The knob member 106 is used to rotate the chuck body 1, causing the travel protrusion 107 to move back and forth within the travel groove 210, resulting in relative reciprocating movement between the chuck body 1 and the sleeve 2. The first sleeve 206 is provided with a locking groove 208, and the second sleeve 207 is provided with a locking boss 209 that matches the locking groove 208. The locking groove 208 and the locking boss 209 are both provided on the combined section 306 of the first sleeve 206 and the second sleeve 207. During actual production and assembly, the user first places the second sleeve 207 on the chuck body 1, installs the travel protrusion 107 in the travel groove 210, then places the locking boss 209 through the locking groove 208, assembling the first and second sleeves 206, 207 together. Finally, the first and second sleeves 206, 207 are placed within the outer sleeve 5. During actual use, the user first puts the chuck assembly on the external component through the cavity 301, fixes the outer sleeve 5 by hand, and then rotates the knob component 106 counterclockwise, and the travel protrusion 107 moves backward along the edge of the travel groove 210, that is, the chuck body 1 retreats relative to the sleeve 2, and the outer conical surface 303 and the inner conical surface 203 are pressed, so that the chuck unit 3 contracts radially, and the multiple jaws 305 are clamped and fixed on the external component; or, the user fixes the outer sleeve 5 by hand, first rotates the knob component 106 clockwise, and the travel protrusion 107 moves forward along the edge of the travel groove 210, that is, the chuck body 1 moves forward relative to the sleeve 2, and the outer conical surface 303 is away from the inner conical surface 203, the chuck unit 3 expands radially, and the multiple jaws 305 relax their grip on the external component. By providing the travel protrusion 107 and the travel groove 210 and rotating the knob member 106 to make the chuck body 1 move back and forth relative to the sleeve 2, the chuck assembly can be installed, fixed or disassembled.

[0036] Specifically, a conveniently installed and fixed chuck assembly further includes an outer sleeve 5 having a second through hole 501 extending therethrough, and accommodating the sleeve 2. In this embodiment, the outer sleeve 5 can be a silicone sleeve, which effectively increases the friction between the user and the sleeve 2 when the user drives the sleeve 2, thus providing practicality.

[0037] Specifically, the sleeve 2 comprises a first sleeve set 206 and a second sleeve set 207, the first sleeve set 206 and the second sleeve set 207 are combined to cover the chuck body 1, the first sleeve set 206 and the second sleeve set 207 are contained in the second through hole 501, and the outer sleeve set 5 covers the first sleeve set 206 and the second sleeve set 207, so that the first sleeve set 206 and the second sleeve set 207 are fixed. In the embodiment, since the maximum diameter of the cross section of the plurality of clamping jaws 305 is greater than the maximum diameter of the first through hole 201, and the inner diameter of the protruding portion 204 is smaller than the outer diameter of the protruding portion 101, the sleeve 2 cannot be integrally installed on the chuck body 1, so the sleeve 2 is divided into the first sleeve set 206 and the second sleeve set 207 along a plane coplanar with the central axis of the sleeve 2. In actual production and installation, the user places the chuck body 1 into the first sleeve set 206, then matches the second sleeve set 207 with the first sleeve set 206, combines to cover the chuck body 1, and then covers the first sleeve set 206 and the second sleeve set 207 with the outer sleeve set 5. The outer sleeve set 5 is arranged to facilitate the combination and fixation of the first sleeve set 206 and the second sleeve set 207, and to prevent the first sleeve set 206 and the second sleeve set 207 from being accidentally separated and falling off the chuck body 1.

[0038] Specifically, the connecting portion 103 is provided with a counterbore 105, the counterbore 105 is recessed from the outer surface of the connecting portion 103, and the counterbore 105 is communicated with the cavity 301, and the central axis of the counterbore 105 is arranged in line with the central axis of the cavity 301. In the embodiment, the pressing block 401 is provided with a third through hole 403 penetrating through the pressing block 401, the third through hole 403 is communicated with the inner diameter of the hollow spring member 402, and the inner diameter of the spring member 402 is further communicated with the counterbore 105. In actual use, the user installs the chuck assembly on an external member, and the external member penetrates through the chuck assembly, so that the chuck assembly is not limited to be clamped and fixed on the edge of the external member.

[0039] Specifically, the intersection angle α between the abutting plane 302 and the abutting outer conical surface 303 is ° to °. In the embodiment, the abutting plane 302 can also be an inwardly recessed inclined surface, at this time, when the intersection angle between the abutting outer conical surface 303 and the abutting plane 302 is 45° to 60°, the extrusion effect of the abutting inner conical surface 203 and the abutting outer conical surface 303 is better, and when the abutting plane 302 is arranged flush, the intersection angle between the abutting outer conical surface 303 and the abutting plane 302 is 60° to 80°, and the extrusion effect of the abutting inner conical surface 203 and the abutting outer conical surface 303 is better.

[0040] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as a limitation of the present application.

Claims

1. A conveniently installed and fixed chuck assembly, characterized by: The invention comprises a chuck body (1) and a sleeve (2), wherein the sleeve (2) is provided with a first through hole (201) penetrating the sleeve (2), the chuck body (1) is arranged in the first through hole (201), and the sleeve (2) and the chuck body (1) are in relative reciprocating motion via an external force, a chuck unit (3) is arranged at one end of the chuck body (1), the chuck unit (3) has a plurality of jaws (305), adjacent jaws (305) have gaps therebetween, the plurality of jaws (305) are surrounded to form a cavity (301), and the cavity (301) accommodates an external component, and when the sleeve (2) and the chuck body (1) are in relative reciprocating motion, the sleeve (2) and the jaws (305) contact or separate, so that the chuck unit (3) contracts or expands radially.

2. A conveniently installed and fixed chuck assembly according to claim 1, characterized in that: The clamping jaw (305) is provided with a contact plane (302) and a contact outer conical surface (303), the contact plane (302) is used to contact with the plane of the external component, the contact plane (302) and the contact outer conical surface (303) intersect and the intersection section forms an angle α, the sleeve (2) is provided with an end face (202) and a contact inner conical surface (203) intersecting with the end face (202), the contact inner conical surface (203) is located between the end face (202) and the inner surface of the sleeve (2), and when the sleeve (2) is pushed relative to the chuck body (1) by an external force, the contact inner conical surface (203) and the contact outer conical surface (303) are close to each other and contact each other.

3. The conveniently installed and fixed chuck assembly according to claim 1, characterized in that: The chuck body (1) has a protrusion (101), which is located between the two ends of the chuck body (1) that are separated from each other. The protrusion (101) protrudes from the outer surface of the chuck body (1), and the protrusion (101) and the plurality of clamping claws (305) form a limiting groove (102).

4. A conveniently installed and fixed chuck assembly according to claim 2 or 3, characterized in that: The sleeve (2) has a protruding portion (204) that protrudes from the inner surface of the sleeve (2). The protruding portion (204) is located at one end close to the inner conical surface (203) and is accommodated in the limiting groove (102).

5. The conveniently installed and fixed chuck assembly according to claim 1, characterized in that: The chuck assembly that is conveniently installed and fixed further comprises an elastic assembly (4), the elastic assembly (4) comprising a pressing block (401), a spring member (402) having one end connected to the pressing block (401), a connecting portion (103) being provided at one end of the chuck body (1) away from the clamping jaw (305), the other end of the spring member (402) being connected to the connecting portion (103), and the elastic assembly (4) being used for driving the chuck body (1) to move relative to the sleeve (2).

6. The conveniently installed and fixed chuck assembly according to claim 1, characterized in that: The chuck body (1) has a threaded portion (104), the threaded portion (104) is located between the two ends of the chuck body (1) that are far away from each other, and the threaded portion (104) protrudes from the outer surface of the chuck body (1), the threaded portion (104) is an external thread structure, the sleeve (2) has a threaded groove (205) that matches the threaded portion (104), the threaded groove (205) is recessed from the inner surface of the sleeve (2), the threaded groove (205) is an internal thread structure, and the chuck body (1) is rotatably connected to the sleeve (2).

7. The conveniently installed and fixed chuck assembly according to claim 1, characterized in that: It also includes an outer set (5), the outer set (5) is provided with a second through hole (501) running through the outer set (5), and the second through hole (501) accommodates the sleeve (2).

8. The conveniently installed and fixed chuck assembly according to claim 7, characterized in that: The sleeve (2) comprises a first set (206) and a second set (207); the first set (206) and the second set (207) are combined and sleeved on the chuck body (1); the first set (206) and the second set (207) are accommodated in the second through hole (501); and the outer set (5) is sleeved on the first set (206) and the second set (207) so that the first set (206) and the second set (207) are combined and fixed.

9. The conveniently installed and fixed chuck assembly according to claim 5, characterized in that: The connecting portion (103) is provided with a countersunk hole (105), which is recessed from the outer surface of the connecting portion (103) and communicates with the cavity (301). The central axis of the countersunk hole (105) is collinear with the central axis of the cavity (301).

10. The conveniently installed and fixed chuck assembly according to claim 2, characterized in that: The value of the angle α formed by the intersection section of the interfering plane (302) and the interfering outer conical surface (303) is 45° to 80°.

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