Screw-free chuck structure for quick locking

Abstract

The invention relates to a screw-free quick locking chuck structure, and relates to the technical field of clamps, the screw-free quick locking chuck structure comprises a main shaft assembly and a chuck assembly, the chuck assembly comprises a chuck part and a connecting part nested outside the bottom end of the chuck part, and a clamping groove is formed in the clamping position, close to the main shaft assembly, of the connecting part; the main shaft assembly comprises a main shaft body, a fixing outer sleeve arranged outside the main shaft body in an embedded mode and a locking outer sleeve arranged outside the fixing outer sleeve in an embedded mode, the locking outer sleeve is connected with the fixing outer sleeve in a sliding mode, and a plurality of steel balls are arranged at the clamping position, close to the chuck assembly, of the main shaft body. When the locking outer sleeve is static, the steel balls are pressed by the locking outer sleeve towards the interior of the main shaft body, and the steel balls protrude towards the interior of the main shaft body and are clamped in the clamping grooves, so that the chuck assembly and the main shaft assembly are clamped and fixed. When the locking outer sleeve moves to a first preset distance in the direction close to the fixing outer sleeve, the pressing force borne by the steel balls disappears, the steel balls are separated from the clamping grooves, and the chuck assembly is separated from the main shaft assembly. The chuck replacing device has the effects that the chuck replacing process is simplified, and the chuck replacing speed is increased.

Description

Technical Field

[0001] The present application relates to the technical field of clamps, and in particular to a clamp structure for screw-free quick locking. Background Art

[0002] A fixture is a device used to fix the object to be processed in the mechanical manufacturing process so that it occupies the correct position for construction or inspection. The fixture plays a role in stabilizing the processing accuracy of the workpiece during the processing. By installing the workpiece with a fixture, the relative position relationship between the workpiece and the processing equipment can be accurately determined. This precise position determination ensures the position accuracy of the workpiece and is not affected by fluctuations in the worker's technical level. Therefore, the use of fixtures can ensure high and stable processing accuracy, making the processing quality of a batch of workpieces tend to be consistent.

[0003] Existing clamps usually require screws when replacing and fixing the chuck, and additional adjustments to the clamp status are required. For example, when used in an inductor winding machine, it is usually necessary to manually adjust the clamp rotation angle, insertion depth of the shaft hole, etc., which is more dependent on manual operation, resulting in a more cumbersome and complicated chuck replacement process, thereby affecting processing efficiency. Summary of the invention

[0004] The purpose of the present application is to provide a screw-free quick-locking chuck structure to simplify the chuck replacement process and increase the chuck replacement speed.

[0005] In the first aspect, the present application provides a screw-free quick-locking chuck structure that adopts the following technical solution: A chuck structure for screw-free quick locking, comprising a spindle assembly and a chuck assembly, wherein the chuck assembly is inserted into the spindle assembly and fixedly connected with the spindle assembly; The chuck assembly comprises a chuck portion and a connecting portion nested outside the bottom end of the chuck portion, and a clamping groove is provided at a clamping position of the connecting portion close to the spindle assembly; The spindle assembly comprises a spindle body, a fixed sleeve nested outside the spindle body, and a locking sleeve nested outside the fixed sleeve, the locking sleeve is slidably connected to the fixed sleeve, and a plurality of steel balls are provided at a clamping position of the spindle body close to the chuck assembly; When the locking sleeve is stationary, the steel ball is pushed forward by the locking sleeve toward the inside of the main shaft body. At this time, the inner slope of the locking sleeve will produce a pressing force on the steel ball, and the steel ball protrudes toward the inside of the main shaft body and is clamped in the clamping groove, so that the chuck assembly is clamped and fixed to the main shaft assembly; When the locking sleeve moves to a first preset distance in a direction close to the fixed sleeve, the pressing force on the steel ball disappears, and the steel ball is disengaged from the clamping groove, so that the chuck assembly is separated from the spindle assembly.

[0006] By adopting the above technical solution, when the chuck assembly needs to be inserted, the present application only needs to move the locking jacket toward the fixed jacket to the first preset distance, so that the steel ball can be disengaged from the clamping groove, thereby easily inserting the chuck assembly, and then loosening the locking jacket, the steel ball then protrudes into the spindle body and clamps in the clamping groove, so that the chuck assembly is clamped and fixed with the spindle assembly, and vice versa, when the chuck assembly needs to be removed, the locking jacket is also moved toward the fixed jacket to the first preset distance, so that the chuck assembly can be easily removed. Thus, the effect of fast replacement of the chuck is achieved, which plays a role in fast replacement and convenient replacement in the first-line production and use process and in the case of model change, effectively replacing the traditional screw locking method and the technical dependence on manual operation, simplifying the chuck replacement process, and improving the chuck replacement speed.

[0007] Furthermore, a first return spring is provided between the main shaft body and the fixed sleeve, the bottom end of the first return spring is clamped with the fixed sleeve, and the top end of the first return spring is clamped with the locking sleeve; When the locking sleeve is stationary, the first return spring maintains a return state; When the locking sleeve moves toward the fixed sleeve, the first return spring is in a compressed state.

[0008] By adopting the above-mentioned technical solution, the present application resets the locking sleeve through the first reset spring. When the locking sleeve is loosened after the chuck assembly is inserted, the locking sleeve is reset by the first reset spring, so that the steel ball protrudes toward the inside of the spindle body and is clamped in the clamping groove, thereby simplifying the chuck replacement process and improving the chuck replacement speed.

[0009] Furthermore, the chuck portion includes a chuck core, a chuck body mounted outside the chuck core, and a chuck sleeve nested outside the chuck body; The bottom of the chuck body is fixedly connected to the connecting portion, the top of the chuck body is an inverted trapezoidal cylindrical structure, and the chuck body includes a plurality of chuck elastic columns, and there is a gap between every two chuck elastic columns; When the chuck sleeve is stationary, the tops of the plurality of chuck elastic columns are clamped; When the chuck upper sleeve moves to a second preset distance in a direction away from the top of the chuck body, the tops of the plurality of chuck elastic columns open.

[0010] By adopting the above-mentioned technical scheme, the chuck head of the present application is used to clamp and fix the workpiece. When the workpiece needs to be fixed, it is only necessary to move the upper sleeve of the chuck away from the top of the chuck body to a second preset distance, so that the inverted trapezoidal cylindrical structure on the top of the chuck body can be disengaged from the chuck sleeve, and the top of the chuck elastic column can be opened to facilitate the placement of the workpiece. After the workpiece is placed, the upper sleeve of the chuck is loosened to clamp the top of the elastic column of the chuck, thereby clamping and fixing the workpiece, thereby improving the convenience of using the chuck.

[0011] Furthermore, a second return spring is provided between the chuck upper sleeve and the chuck body, the bottom end of the second return spring is clamped with the top end of the connecting portion, and the top end of the second return spring is clamped with the chuck upper sleeve; When the chuck sleeve is stationary, the second return spring maintains a return state; When the chuck upper sleeve moves in a direction away from the top of the chuck body, the second return spring is in a compressed state.

[0012] By adopting the above technical solution, the present application resets the upper sleeve of the chuck through the second reset spring. When the chuck upper sleeve is released after the workpiece is fixed, the second reset spring resets the upper sleeve of the chuck, so that the top of several chuck elastic columns clamp the workpiece, thereby improving the convenience of using the chuck.

[0013] Furthermore, a plurality of blowing holes are provided on the top of the chuck core, and the blowing holes are used for cooling and blowing the inside of the chuck.

[0014] By adopting the above technical solution, the present application takes into account that after the chuck assembly clamps the chip inductor core during the winding production process, iron powder of the core will remain inside the chuck assembly over time. At this time, the internal air blow hole can be used to automatically clean it, which can replace manual operation and ensure the cleaning efficiency. At the same time, considering that when clamping the thin chip inductor soldering, the temperature of the solder reaches a high temperature of about 500 degrees, which will cause high temperature to the product, resulting in dark cracks and damage to the product, and the rosin smoke mold generated during soldering adheres to the inside of the chuck, resulting in obvious marks on the product, etc., resulting in a high defect rate. At this time, in soldering or other high-temperature scenarios, the product can be cooled and cooled by breeze through the cooling air hole, solving the problem of rosin smoke mold adhering to the inside of the chuck, while also avoiding the problems of dark cracks and damage to the product caused by high temperature, thereby effectively improving the product's qualified rate.

[0015] Furthermore, two symmetrical positioning grooves are formed at the top of the spindle body, and a directional pin is formed on the outer side of the connecting portion. The directional pin is inserted into any of the positioning grooves to fix the clamping position and direction of the chuck assembly and the spindle assembly.

[0016] By adopting the above technical solution, the present application ensures that the position of the chuck assembly when inserted into the spindle assembly can be determined by cooperating with the positioning groove and the directional pin, without the need for manual adjustment of the angle and position, thereby improving the convenience of using the chuck.

[0017] Furthermore, a limiting ring is provided on the top of the locking sleeve, and the limiting ring is nested outside the main shaft body. The limiting ring is fixedly connected to the main shaft body through a plurality of first connecting members.

[0018] By adopting the above technical solution, the present application limits the locking sleeve through a limiting ring, so that the stability of the chuck structure can be ensured when the locking sleeve receives the elastic force of the first return spring.

[0019] Furthermore, a first connecting groove is provided at the connection between the main shaft body and the limiting ring, and a plurality of first connecting members pass through the limiting ring and are clamped in the first connecting groove, so that the limiting ring is fixedly connected to the main shaft body.

[0020] By adopting the above technical solution, the present application fixes the limit ring to the main shaft body through the first connecting groove and the first connecting member, which is convenient for disassembly and installation and improves the convenience of assembling the chuck structure.

[0021] Furthermore, a second connecting groove is provided at the connection between the chuck body and the connecting portion, and a plurality of second connecting members pass through the connecting portion and are snapped into the second connecting groove, so that the connecting portion is fixedly connected to the chuck body.

[0022] By adopting the above technical solution, the present application fixes the connection part to the chuck body through the second connecting groove and the second connecting member, which is convenient for disassembly and installation, and improves the convenience of assembling the chuck structure.

[0023] Furthermore, a sealing ring is provided at the connection between the chuck assembly and the spindle assembly.

[0024] By adopting the above technical solution, the present application improves the sealing performance inside the chuck structure through the sealing ring.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, when the chuck assembly needs to be inserted, the locking sleeve only needs to be moved toward the fixed sleeve to a first preset distance, so that the steel ball can be disengaged from the clamping groove, thereby easily inserting the chuck assembly, and then the locking sleeve is released, and the steel ball then protrudes toward the inside of the spindle body and clamps into the clamping groove, so that the chuck assembly is clamped and fixed to the spindle assembly. Conversely, when the chuck assembly needs to be removed, the locking sleeve is also moved toward the fixed sleeve to a first preset distance, so that the chuck assembly can be easily removed. Thus, the effect of rapid replacement of the chuck is achieved, which plays a role in rapid replacement and convenient model change during the first-line production and use process and model change, effectively replacing the traditional screw locking method and the technical dependence on manual operation, simplifying the chuck replacement process, and improving the chuck replacement speed; 2. The chuck of the present application is used to clamp and fix the workpiece. When the workpiece needs to be fixed, the chuck cover only needs to be moved away from the top of the chuck body to a second preset distance, so that the inverted trapezoidal cylindrical structure on the top of the chuck body can be disengaged from the chuck cover, and the top of the chuck elastic column can be opened to facilitate the placement of the workpiece. After the workpiece is placed, the chuck cover is loosened to clamp the top of the chuck elastic column, thereby clamping and fixing the workpiece, thereby improving the convenience of using the chuck; 3. This application takes into account that after the chuck assembly clamps the chip inductor core during the winding production process, iron powder of the core will remain inside the chuck assembly over time. At this time, the internal air blow hole can be used to automatically clean it, which can replace manual operation and ensure the cleaning efficiency. At the same time, considering that when clamping the thin chip inductor soldering, the temperature of the solder reaches a high temperature of about 500 degrees, which will cause high temperature to the product, resulting in dark cracks and damage to the product, and the rosin smoke mold generated during soldering adheres to the inside of the chuck, resulting in obvious marks on the product, etc., resulting in a high defect rate. At this time, in soldering or other high-temperature scenarios, the product can be cooled and cooled by breeze through the cooling air hole to solve the problem of rosin smoke mold adhering to the inside of the chuck, while also avoiding the problems of dark cracks and damage to the product caused by high temperature, thereby effectively improving the product's qualified rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic cross-sectional structural diagram of an embodiment of the present application; Figure 3 It is a schematic diagram of the main shaft body structure of an embodiment of the present application; Figure 4 is a schematic diagram of the structure of a chuck assembly according to an embodiment of the present application; Figure 5 This is a schematic diagram of the structure of the chuck body of an embodiment of the present application; Figure 6 This is a schematic diagram of the chuck core structure of an embodiment of the present application; In the figure, 1, spindle assembly; 11, spindle body; 111, positioning groove; 112, first connecting groove; 12, fixing sleeve; 13, locking sleeve; 14, steel ball; 15, first reset spring; 16, limit ring; 161, first connecting piece; 2, chuck assembly; 21, chuck part; 211, chuck top core; 2111, blowing hole; 212, chuck body; 2121, inverted trapezoidal cylindrical structure; 2122, chuck elastic column; 2123, second connecting groove; 213, chuck upper sleeve; 214, second reset spring; 22, connecting part; 221, clamping groove; 222, directional pin; 223, second connecting piece; 224, sealing ring. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0028] Existing clamps usually require screws when replacing and fixing the chuck, and additional adjustments to the clamp state are required, such as the rotation angle, the insertion depth of the shaft hole, etc., which are more dependent on manual operation, resulting in a more cumbersome and complicated chuck replacement process, thereby affecting processing efficiency. Therefore, the embodiment of the present application provides a screw-free quick-locking chuck structure, referring to Figure 1 , Figure 2 and Figure 3 , including a spindle assembly 1 and a chuck assembly 2, wherein the bottom of the spindle assembly 1 is used to connect the equipment, the top of the chuck assembly 2 is used to clamp the workpiece, the chuck assembly 2 is inserted into the spindle assembly 1 and is clamped and fixed with the spindle assembly 1, so as to facilitate the replacement of different chuck assemblies 2. The chuck assembly 2 includes a chuck portion 21 and a connecting portion 22 nested outside the bottom end of the chuck portion 21, and a clamping groove 221 is provided at the clamping position of the connecting portion 22 near the spindle assembly 1. The spindle assembly 1 includes a spindle body 11, a fixed sleeve 12 nested outside the spindle body 11, and a locking sleeve 13 nested outside the fixed sleeve 12, the locking sleeve 13 is slidably connected to the fixed sleeve 12, and a plurality of steel balls 14 are provided at the clamping position of the spindle body 11 near the chuck assembly 2. In the specific implementation process, the steel balls 14 can be two, four or more symmetrically arranged. When the locking sleeve 13 is stationary, the steel ball 14 is pressed by the locking sleeve 13 toward the inside of the spindle body 11, and the steel ball 14 protrudes toward the inside of the spindle body 11 and is clamped in the clamping groove 221, so that the chuck assembly 2 is clamped and fixed to the spindle assembly 1. When the locking sleeve 13 moves to a first preset distance in the direction close to the fixed sleeve 12, the pressing force on the steel ball 14 disappears, and the steel ball 14 is disengaged from the clamping groove 221, so that the chuck assembly 2 is separated from the spindle assembly 1.

[0029] A first return spring 15 is also provided between the main shaft body 11 and the fixed sleeve 12. The bottom end of the first return spring 15 is engaged with the fixed sleeve 12, and the top end of the first return spring 15 is engaged with the locking sleeve 13. When the locking sleeve 13 is stationary, the first return spring 15 remains in a reset state. When the locking sleeve 13 moves toward the fixed sleeve 12, the first return spring 15 is in a compressed state.

[0030] The implementation principle of the embodiment of the present application is as follows: when the chuck assembly 2 needs to be inserted, the locking sleeve 13 only needs to be moved to the first preset distance in the direction close to the fixed sleeve 12, so that the steel ball 14 can be disengaged from the clamping groove 221, thereby easily inserting the chuck assembly 2, and then releasing the locking sleeve 13, the steel ball 14 then protrudes into the spindle body 11 and is clamped into the clamping groove 221, so that the chuck assembly 2 and the spindle assembly 1 are clamped and fixed, and conversely, when the chuck assembly 2 needs to be removed, the locking sleeve 13 is also moved to the first preset distance in the direction close to the fixed sleeve 12, so that the chuck assembly 2 can be easily removed. The locking sleeve 13 is reset by the first reset spring 15, and when the locking sleeve 13 is released after the chuck assembly 2 is inserted, the locking sleeve 13 is reset by the first reset spring 15, so that the steel ball 14 then protrudes into the spindle body 11 and is clamped into the clamping groove 221. This enables quick replacement of the chuck, which plays a role in quick and convenient replacement during front-line production and use and when changing models. It effectively replaces the traditional screw locking method and technical dependence on manual operation, simplifies the chuck replacement process, and increases the speed of chuck replacement.

[0031] For example, assuming that the first preset distance is 6 mm, that is, the distance between the top of the locking sleeve 13 and the steel ball 14 in the static state is at least 6 mm, when the chuck assembly 2 needs to be inserted, the locking sleeve 13 only needs to be moved about 6 mm toward the fixed sleeve 12 to easily insert the chuck assembly 2, and then the locking sleeve 13 is released. At this time, the steel ball 14 locks the chuck assembly 2 with the push of the first return spring 15 and the locking sleeve 13.

[0032] like Figure 2 and Figure 3 As shown, two symmetrical positioning grooves 111 are provided at the top of the spindle body 11 of the embodiment of the present application, and a directional pin 222 is provided on the outer side of the connecting portion 22. The directional pin 222 is inserted into any of the positioning grooves 111 to fix the clamping position and direction of the chuck assembly 2 and the spindle assembly 1. The directional pin 222 is aligned with the positioning groove 111 and inserted by matching the positioning groove 111, ensuring that the position of the chuck assembly 2 when inserted into the spindle assembly 1 can be determined, and there is no need to manually adjust the angle and position again after insertion, thereby improving the convenience of using the chuck.

[0033] like Figure 1 , Figure 2 and Figure 3 As shown, a limiting ring 16 is provided on the top of the locking sleeve 13 in the embodiment of the present application, and the limiting ring 16 is nested outside the main shaft body 11. The limiting ring 16 is fixedly connected to the main shaft body 11 through a plurality of first connecting members 161. A first connecting groove 112 is provided at the connection between the main shaft body 11 and the limiting ring 16, and a plurality of first connecting members 161 pass through the limiting ring 16 and are clamped in the first connecting groove 112, so that the limiting ring 16 is fixedly connected to the main shaft body 11. There are four first connecting members 161 in the embodiment of the present application, and there may be two or more in other embodiments.

[0034] like Figure 2 , Figure 4 and Figure 5 As shown, the chuck portion 21 of the embodiment of the present application includes a chuck core 211, a chuck body 212 installed outside the chuck core 211, and a chuck upper sleeve 213 nested outside the chuck body 212. The bottom of the chuck body 212 is fixedly connected to the connecting portion 22, the top of the chuck body 212 is an inverted trapezoidal cylindrical structure 2121, and the chuck body 212 includes a plurality of chuck elastic columns 2122, and there is a gap between every two chuck elastic columns 2122. When the chuck upper sleeve 213 is stationary, the tops of the plurality of chuck elastic columns 2122 are clamped. When the chuck upper sleeve 213 moves in a direction away from the top of the chuck body 212 to a second preset distance, the tops of the plurality of chuck elastic columns 2122 open. A second return spring 214 is further provided between the chuck upper sleeve 213 and the chuck body 212, the bottom end of the second return spring 214 is clamped with the top end of the connecting portion 22, and the top end of the second return spring 214 is clamped with the chuck upper sleeve 213; when the chuck upper sleeve 213 is stationary, the second return spring 214 remains in a reset state. When the chuck upper sleeve 213 moves in a direction away from the top of the chuck body 212, the second return spring 214 is in a compressed state.

[0035] The implementation principle of the embodiment of the present application is as follows: the chuck portion 21 is used to clamp and fix the workpiece. When the workpiece needs to be fixed, the chuck cover 213 only needs to be moved away from the top of the chuck body 212 to a second preset distance, so that the inverted trapezoidal cylindrical structure 2121 at the top of the chuck body 212 is disengaged from the chuck cover 213, and the top of the chuck elastic column 2122 can be opened to facilitate the placement of the workpiece. After the workpiece is placed, the chuck cover 213 is released to clamp the top of the chuck elastic column 2122, thereby clamping and fixing the workpiece. The chuck cover 213 is reset by the second reset spring 214. When the chuck cover 213 is released after the workpiece is fixed, the chuck cover 213 is reset by the second reset spring 214, so that the top of several chuck elastic columns 2122 clamp the workpiece, thereby improving the convenience of using the chuck.

[0036] In a preferred embodiment, in order to improve the sealing inside the chuck structure, a sealing ring 224 is further provided at the connection between the chuck assembly 2 and the spindle assembly 1 of the embodiment of the present application, and the sealing ring 224 is installed at the position where the connecting portion 22 is inserted into the spindle body 11. In order to improve the corrosion resistance of the top of the chuck body 212, the top of the chuck body 212 is made of tungsten steel, which can effectively prevent the corrosion of materials such as rosin and tin.

[0037] like Figure 6 As shown, a plurality of air blowing holes 2111 are provided on the top of the chuck top core 211 of the embodiment of the present application, and the air blowing holes 2111 are used to cool and blow air inside the chuck part 21, especially the chuck part. Considering that the chuck assembly 2 will produce iron powder of the magnetic core remaining inside the chuck assembly 2 for a long time after clamping the chip inductor magnetic core during the winding production process, the internal air blowing holes 2111 can be used to automatically clean it, which can replace manual operation and ensure the efficiency of cleaning. At the same time, considering that when clamping the thin chip inductor soldering, the temperature of the solder reaches a high temperature of about 500 degrees, which will cause high temperature to the product, resulting in dark cracks and damage of the product, and the rosin smoke mold generated during soldering adheres to the inside of the chuck, resulting in obvious imprints on the product, etc., and the defective rate is high. At this time, in soldering or other high-temperature scenarios, the cooling air blowing holes 2111 can be used to cool the product with a breeze to solve the problem of rosin smoke mold adhering to the inside of the chuck, and at the same time avoid the problem of dark cracks and damage of the product caused by high temperature, thereby effectively improving the qualified rate of the product.

[0038] like Figure 2 and Figure 6 As shown, a second connection groove 2123 is provided at the connection between the chuck body 212 and the connection part 22 , and a plurality of second connection members 223 pass through the connection part 22 and are snapped into the second connection groove 2123 , so that the connection part 22 and the chuck body 212 are fixedly connected.

[0039] In the embodiment of the present application, the limit ring 16 is fixedly connected to the main shaft body 11 through the first connecting groove 112 and the first connecting member 161, and the connecting part 22 is fixedly connected to the chuck body 212 through the second connecting groove 2123 and the second connecting member 223, so that the overall structure is easy to disassemble and install, thereby improving the convenience of assembling the chuck structure.

[0040] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A chuck structure for screw-free quick locking, characterized in that: It comprises a spindle assembly (1) and a chuck assembly (2), wherein the chuck assembly (2) is inserted into the spindle assembly (1) and is clamped and fixed to the spindle assembly (1); The chuck assembly (2) comprises a chuck portion (21) and a connecting portion (22) nested outside the bottom end of the chuck portion (21); a clamping groove (221) is provided at a clamping position of the connecting portion (22) close to the spindle assembly (1); The spindle assembly (1) comprises a spindle body (11), a fixed sleeve (12) nested outside the spindle body (11), and a locking sleeve (13) nested outside the fixed sleeve (12), the locking sleeve (13) being slidably connected to the fixed sleeve (12), and a plurality of steel balls (14) are provided at a clamping position of the spindle body (11) close to the chuck assembly (2); When the locking sleeve (13) is stationary, the steel ball (14) is pressed by the locking sleeve (13) toward the inside of the spindle body (11), and the steel ball (14) protrudes toward the inside of the spindle body (11) and is clamped in the clamping groove (221), so that the chuck assembly (2) and the spindle assembly (1) are clamped and fixed; When the locking sleeve (13) moves to a first preset distance in a direction approaching the fixed sleeve (12), the pressing force exerted on the steel ball (14) disappears, and the steel ball (14) disengages from the clamping groove (221), thereby separating the chuck assembly (2) from the spindle assembly (1).

2. A screwless quick-locking chuck structure according to claim 1, characterized in that: A first return spring (15) is also provided between the main shaft body (11) and the fixed sleeve (12), the bottom end of the first return spring (15) is clamped with the fixed sleeve (12), and the top end of the first return spring (15) is clamped with the locking sleeve (13); When the locking sleeve (13) is stationary, the first return spring (15) maintains a return state; When the locking sleeve (13) moves towards the direction approaching the fixed sleeve (12), the first return spring (15) is in a compressed state.

3. The chuck structure for screwless quick locking according to claim 1, characterized in that: The chuck portion (21) comprises a chuck core (211), a chuck body (212) installed outside the chuck core (211), and a chuck sleeve (213) nested outside the chuck body (212); The bottom of the chuck body (212) is fixedly connected to the connecting portion (22); the top of the chuck body (212) is an inverted trapezoidal cylindrical structure (2121); the chuck body (212) comprises a plurality of chuck elastic columns (2122); and a gap is provided between every two chuck elastic columns (2122); When the chuck sleeve (213) is stationary, the tops of the plurality of chuck elastic columns (2122) are clamped; When the chuck upper sleeve (213) moves to a second preset distance in a direction away from the top of the chuck body (212), the tops of the plurality of chuck elastic columns (2122) open.

4. The chuck structure for screwless quick locking according to claim 3, characterized in that: A second return spring (214) is also provided between the chuck upper sleeve (213) and the chuck body (212), the bottom end of the second return spring (214) is clamped with the top end of the connecting portion (22), and the top end of the second return spring (214) is clamped with the chuck upper sleeve (213); When the chuck upper sleeve (213) is stationary, the second return spring (214) maintains a return state; When the chuck upper sleeve (213) moves in a direction away from the top of the chuck body (212), the second return spring (214) is in a compressed state.

5. The chuck structure for screwless quick locking according to claim 3, characterized in that: A plurality of blowing holes (2111) are provided on the top of the chuck top core (211), and the blowing holes (2111) are used for blowing air to cool the interior of the chuck portion (21).

6. A screwless quick-locking chuck structure according to any one of claims 1 to 5, characterized in that: Two symmetrical positioning grooves (111) are formed at the top of the spindle body (11), and a directional pin (222) is formed on the outside of the connecting portion (22). The directional pin (222) is inserted into any one of the positioning grooves (111) to fix the clamping position and direction of the chuck assembly (2) and the spindle assembly (1).

7. A screwless quick-locking chuck structure according to any one of claims 1 to 5, characterized in that: A limiting ring (16) is also provided on the top of the locking sleeve (13). The limiting ring (16) is nested outside the main shaft body (11). The limiting ring (16) is fixedly connected to the main shaft body (11) via a plurality of first connecting members (161).

8. The chuck structure for screwless quick locking according to claim 7, characterized in that: A first connecting groove (112) is provided at the connection between the main shaft body (11) and the limiting ring (16); a plurality of first connecting members (161) pass through the limiting ring (16) and are clamped in the first connecting groove (112), so that the limiting ring (16) is fixedly connected to the main shaft body (11).

9. A screwless quick-locking chuck structure according to any one of claims 3 to 5, characterized in that: A second connecting groove (2123) is provided at the connection between the chuck body (212) and the connecting portion (22); a plurality of second connecting members (223) pass through the connecting portion (22) and are snap-fitted into the second connecting groove (2123), so that the connecting portion (22) and the chuck body (212) are fixedly connected.

10. A screwless quick-locking chuck structure according to any one of claims 1 to 5, characterized in that: A sealing ring (224) is also provided at the connection between the chuck assembly (2) and the spindle assembly (1).

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