Extended clamping device for machine tool spindle

Abstract

The invention belongs to the technical field of clamps. In order to solve the problem that an existing machine tool is limited by the length of a cutter system when machining a concave workpiece and is difficult to accurately reach a specified machining position, the invention provides a machine tool spindle extension clamping device which comprises a control mechanism, a shell assembly, a clamping system and a locking system, the shell assembly comprises a connector, a first shell and a second shell which are sequentially connected, the clamping system comprises a multi-stage clamping mechanism and a first position detection mechanism, the locking system comprises a telescopic locking mechanism, a fixing mechanism and a second position detection mechanism, and the control mechanism sequentially receives signals of the first position detection mechanism and the second position detection mechanism. The multi-stage clamping mechanism is controlled in sequence to clamp the blind rivet, the telescopic locking mechanism and the fixing mechanism are controlled in sequence to clamp the cutter handle, the effect of prolonging the main shaft of the machine tool is achieved, machining of any concave workpiece is achieved, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of fixtures, and particularly relates to a clamping device for extending a machine tool spindle. Background Art

[0002] In the process of mechanical manufacturing, as a key intermediate connecting piece, the tool holder directly cooperates with the machine tool spindle. Its main function is to achieve the precise positioning connection between the tool and the machine tool spindle. A pull stud is provided at the end of the tool holder. The pull stud includes a head and a rod portion. The rod portion connects the head of the pull stud and the tool holder, and a broach device is equipped inside the machine tool spindle. This device can precisely hold the pull stud on the tool holder and, by pulling the tool holder, clamp and position the pull stud with the machine tool spindle.

[0003] For machining, especially numerical control machining, a set of efficient tool systems is crucial. However, numerical control machine tools have more stringent requirements for tool systems, which are specifically reflected in the following aspects: requiring higher tool change accuracy and positioning accuracy; requiring the tool system to have high rigidity; the loading, unloading, and adjustment of the tool system should be convenient, that is, standardized, systematic, and universal. These "three standardizations" facilitate the installation of tools on the turret and tool magazine, simplify the structure and movement of the manipulator, reduce the manufacturing cost of tools, reduce the number of tools, expand the applicable range of tools, and are beneficial to numerical control programming and tool management.

[0004] In the field of mechanical manufacturing, although the requirements for tool systems and machine tools are getting higher and higher, when numerical control machine tools process concave workpieces, due to the length limitation of the tool system, it is often difficult to accurately reach the machining position, thus affecting the machining efficiency. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a clamping device for extending a machine tool spindle, which can achieve the effect of extending the machine tool spindle and can accurately position when machining concave workpieces.

[0006] The present invention provides a clamping device for extending a machine tool spindle to realize the connection between the machine tool spindle and the tool holder, and it includes: A control mechanism; A housing assembly, the housing assembly includes a connection head, a first housing, and a second housing connected in sequence. The connection head is inserted into the machine tool spindle. The interiors of the first housing and the second housing both have spaces for accommodating the tool holder, and the outer surface of the first housing is a conical surface that mates with the inner conical surface of the machine tool spindle; A clamping system, the clamping system is arranged in the first housing. The clamping system includes a multi-stage clamping mechanism and a first position detection mechanism. The first position detection mechanism detects the position of the pull stud on the tool holder. The control mechanism receives the signal from the first position detection mechanism and controls the multi-stage clamping mechanism. The multi-stage clamping mechanism is used to clamp the pull stud; A locking system, the locking system includes a telescopic locking mechanism, a fixing mechanism and a second position detection mechanism. The telescopic locking mechanism is arranged on the inner wall of the second housing. The fixing mechanism is arranged on the telescopic locking mechanism. The second position detection mechanism detects the positions of the telescopic locking mechanism and the fixing mechanism. The control mechanism receives the signal of the second position detection mechanism, so as to control the telescopic locking mechanism and the fixing mechanism to act successively. The telescopic locking mechanism is used for clamping the tool shank, and the fixing mechanism is used for fixing the clamped tool shank.

[0007] Optionally, the multi-stage clamping mechanism includes a driving assembly, a sliding assembly and a clamping assembly; The driving assembly includes a first driving member, a second driving member and a third driving member; The sliding assembly includes a base, a cylindrical housing and a plurality of bumps. The cylindrical housing is arranged in the first housing. The base is embedded at the top of the cylindrical housing. The first driving member is arranged in the base. A plurality of the bumps are uniformly arranged along the circumference of the base. A plurality of chutes are arranged on the inner wall of the cylindrical housing, and the plurality of chutes correspond to the plurality of bumps; The clamping assembly includes a plurality of fixing rods, a telescopic rod and a connecting rod. The plurality of fixing rods are arranged at the bottom of the base. The telescopic rod is slidably arranged in the fixing rod. The connecting rod is hinged to the bottom of the telescopic rod. The second driving member is arranged in the fixing rod. The third driving member is arranged at the hinged position of the connecting rod and the telescopic rod; the axial length of the fixing rod is less than the axial length of the head of the pull stud.

[0008] Optionally, the first position detection mechanism includes a first sensor, a second sensor and a third sensor; The first sensor is embedded at the central position of the bottom of the base, and the bottom surface of the first sensor is flush with the bottom surface of the base. The first sensor is used for detecting the distance between the top surface of the head of the pull stud and the bottom surface of the base. When the pull stud is inserted into the first housing in place, the first driving member is started. The first driving member drives the bump to move along the chute. When the signal transmitted by the first sensor reaches a preset value, the control mechanism receives the signal of the first sensor and controls the first driving member to stop; The second sensor is disposed inside the telescopic rod and close to the connecting rod. The second sensor is used to detect the horizontal distance from the inner side of the telescopic rod to the bottom surface of the head of the rivet. After the first driving member stops, the control mechanism controls the second driving member to start. The second driving member drives the telescopic rod to move along the extending direction of the fixed rod. When the signal transmitted by the second sensor reaches a preset value, the control mechanism receives the signal of the second sensor and controls the second driving member to stop; The third sensor is disposed inside the connecting rod and faces the rivet. The third sensor is used to detect the distance between the inner side of the connecting rod and the bottom surface of the head of the rivet. After the second driving member stops, the control mechanism controls the third driving member to start. The third driving member drives the connecting rod to rotate. When the signal transmitted by the third sensor reaches a preset value, the control mechanism receives the signal of the third sensor and controls the third driving member to stop.

[0009] Optionally, the telescopic locking mechanism includes a plurality of fourth driving members, a telescopic member, and a base. The plurality of bases are disposed at the upper and lower ends of the inner wall of the second housing, and the plurality of bases at the upper and lower ends are respectively evenly disposed along the circumferences of the upper and lower ends of the second housing. The fourth driving member and the telescopic member are both disposed on the base. The fourth driving member is used to drive the telescopic member, and the telescopic member moves in a direction perpendicular to the base.

[0010] Optionally, the fixing mechanism includes a plurality of fixing components. The fixing component includes four locking rods. The plurality of fixing components are disposed at the top of the telescopic member. The plurality of fixing components are disposed at the edge of the telescopic member. The plurality of fixing components are symmetrically disposed in pairs with respect to the horizontal and vertical centerlines of the telescopic member. A fifth driving member is disposed at one end of each of the four locking rods close to the telescopic member. The fifth driving member is used to drive the locking rod to move towards the tool handle. A flexible member is disposed at the top of the four locking rods, and the flexible member contacts the tool handle.

[0011] Optionally, a plurality of slots are disposed at the top of the telescopic member, and the plurality of slots correspond to the flexible member. When the locking rod is in a contracted state, the top of the flexible member is flush with the top of the telescopic member.

[0012] Optionally, the second position detection mechanism includes a fourth sensor and a fifth sensor; A groove is provided at the central position of the telescopic member. The fourth sensor is disposed in the groove, and the top of the fourth sensor is flush with the top of the telescopic member. The fourth sensor is used to detect the distance between the top of the telescopic member and the surface of the tool holder. After the third driving member stops, the control mechanism controls the fourth driving member to start. The fourth driving member drives the telescopic member to move towards the tool holder. When the signal transmitted by the fourth sensor reaches a preset value, the control mechanism receives the signal of the fourth sensor and controls the fourth driving member to stop; The fifth sensor is embedded in the top of the locking rod. A through hole is provided at a position corresponding to the fifth sensor on the flexible member. The fifth sensor is used to detect the distance between the top of the locking rod and the surface of the tool holder. After the fourth driving member stops, the control mechanism controls the fifth driving member to start. The fifth driving member drives the locking rod to move towards the tool holder. When the signal transmitted by the fifth sensor reaches a preset value, the control mechanism receives the signal of the fifth sensor and controls the fifth driving member to stop.

[0013] Optionally, a plurality of dynamic balance mechanisms are uniformly embedded in the top of the second housing. The dynamic balance mechanism includes a sixth sensor and a seventh sensor. The sixth sensor and the seventh sensor are symmetrically arranged along the longitudinal center line of the second housing. Both the sixth sensor and the seventh sensor are used to detect the distance between the top of the second housing and the machine tool spindle.

[0014] The technical solution provided by the embodiment of the present invention has the following beneficial effects compared with the prior art: A machine tool spindle extension clamping device provided by an embodiment of the present invention. This device connects the connecting head and the first housing to replace the tool holder and the machine tool spindle. The tool holder is arranged in the second housing, so that the machine tool spindle is not directly connected to the tool holder, increasing the distance between the machine tool spindle and the tool holder, achieving the effect of extending the machine tool spindle, realizing the processing of any concave workpiece, and improving work efficiency. The device is provided with a multi-stage clamping mechanism and a first position detection mechanism in the first housing, and a telescopic locking mechanism, a fixing mechanism and a second position detection mechanism in the second housing. The control mechanism receives the signal of the first position detection mechanism and controls the multi-stage clamping mechanism to clamp the pull stud. The control mechanism controls the telescopic locking mechanism and the fixing mechanism to move towards the tool holder successively by receiving the signal of the second position detection mechanism to clamp the tool holder twice, improving the stability of the tool holder installation and the stability during the movement of the tool holder. Description of the Drawings

[0015] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in accordance with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the accompanying drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those of ordinary skill in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative labor.

[0017] Figure 1 It is a schematic structural diagram of a machine tool spindle extension clamping device according to an embodiment of the present invention; Figure 2 It is Figure 1 a cross-sectional view taken along the A-A direction in Figure 3 It is a schematic structural diagram of a multi-stage clamping mechanism according to an embodiment of the present invention; Figure 4 It is Figure 3 a cross-sectional view taken along the B-B direction in Figure 5 It is a schematic structural diagram of a clamping assembly according to an embodiment of the present invention; Figure 6 It is a schematic structural diagram of a locking system according to an embodiment of the present invention; Figure 7 It is a schematic installation diagram of a fourth driving member on a base according to an embodiment of the present invention; Figure 8 It is a schematic structural diagram of a locking rod according to an embodiment of the present invention.

[0018] Among them, 1. connecting head; 2. first housing; 3. second housing; 4. control mechanism; 5. first driving member; 6. second driving member; 7. third driving member; 8. base; 9. convex block; 10. sliding groove; 11. fixed rod; 12. telescopic rod; 13. connecting rod; 14. first sensor; 15. second sensor; 16. third sensor; 17. fourth driving member; 18. telescopic member; 19. base; 20. fifth driving member; 21. locking rod; 22. flexible member; 23. fourth sensor; 24. fifth sensor; 25. sixth sensor; 26. seventh sensor; 27. cylindrical housing; 28. slot; 29. through hole. Detailed implementation manners

[0019] In order to be able to more clearly understand the above-mentioned objects, features and advantages of the present invention, the solution of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0020] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Referring to Figure 1 and Figure 2 As shown, this embodiment provides a machine tool spindle extension clamping device to realize the connection between the machine tool spindle and the tool holder, including a control mechanism 4, a housing assembly, a clamping system, and a locking system.

[0022] Referring to Figure 1 and Figure 2 As shown, the housing assembly includes a connection head 1, a first housing 2, and a second housing 3 that are connected in sequence. The connection head 1 is shaped like a pull stud, and the connection head 1 is inserted into the machine tool spindle. The interiors of the first housing 2 and the second housing 3 both have spaces for accommodating the tool holder. Moreover, the outer surface of the first housing 2 is a conical surface that mates with the inner conical surface of the machine tool spindle. The conical surface of the first housing 2 can ensure that when this device is inserted into the machine tool spindle for fixation, this device can quickly and accurately align with the machine tool spindle. When the conical surface of the first housing 2 mates with the inner conical surface of the machine tool spindle, a large frictional force is generated through axial pressure. The frictional force and the pressure can realize the connection between the first housing 2 and the machine tool spindle, making it not loosen. This mating method can withstand large axial loads and radial loads, and has high stiffness and load-bearing capacity. In addition, the conical connection can effectively transmit torque, enabling this device to rotate stably.

[0023] Referring to Figure 2 As shown, the clamping system is arranged inside the first housing 2. The clamping system includes a multi-stage clamping mechanism and a first position detection mechanism. The first position detection mechanism detects the position of the pull stud on the tool holder. The control mechanism 4 receives the signal from the first position detection mechanism and controls the multi-stage clamping mechanism. The multi-stage clamping mechanism is used to clamp the pull stud. The locking system includes a telescopic locking mechanism, a fixing mechanism, and a second position detection mechanism. The telescopic locking mechanism is arranged on the inner wall of the second housing 3, the fixing mechanism is arranged on the telescopic locking mechanism, and the second position detection mechanism detects the positions of the telescopic locking mechanism and the fixing mechanism. The control mechanism 4 receives the signal from the second position detection mechanism, thereby controlling the telescopic locking mechanism and the fixing mechanism to act successively. The telescopic locking mechanism is used to clamp the tool holder, and the fixing mechanism is used to fix the clamped tool holder.

[0024] Wherein, the control mechanism 4 is arranged inside the connection head 1. Both the first position detection mechanism and the second position detection mechanism are connected to the control mechanism 4. The control mechanism 4 receives the signal from the second position detection mechanism to respectively control the telescopic locking mechanism and the fixing mechanism to move successively to abut against the tool holder.

[0025] Specifically, the multi-stage clamping mechanism includes a driving component, a sliding component, and a clamping component. The driving component includes a first driving member 5, a second driving member 6, and a third driving member 7. Refer to Figure 3 and Figure 4 As shown, the sliding component includes a base 8, a cylindrical housing 27, and a plurality of bumps 9. The cylindrical housing 27 is disposed in the first housing 2. The base 8 is embedded in the top of the cylindrical housing 27. The first driving member 5 is disposed in the base 8. The plurality of bumps 9 are uniformly arranged along the circumference of the base 8. A plurality of chutes 10 are provided on the inner wall of the cylindrical housing 27. The plurality of chutes 10 correspond to the plurality of bumps 9. The first driving member 5 drives the bumps 9 to move along the chutes 10. Refer to Figure 4 and Figure 5 As shown, the clamping component includes a plurality of fixed rods 11, a telescopic rod 12, and a connecting rod 13. The plurality of fixed rods 11 are disposed at the bottom of the base 8. The telescopic rod 12 is slidably disposed in the fixed rod 11. The telescopic rod 12 can be a multi-stage sliding rod. The connecting rod 13 is hinged to the bottom of the telescopic rod 12. The second driving member 6 is disposed in the fixed rod 11. The second driving member 6 drives the telescopic rod 12 to move along the vertical direction of the fixed rod 11. The third driving member 7 is disposed at the hinged position of the connecting rod 13 and the telescopic rod 12. The third driving member 7 drives the connecting rod 13 to rotate.

[0026] Further, the axial length of the fixing rod 11 is less than the axial length of the head of the rivet. The first position detection mechanism includes a first sensor 14, a second sensor 15, and a third sensor 16. The first sensor 14 is embedded at the center position of the bottom of the base 8, and the bottom surface of the first sensor 14 is flush with the bottom surface of the base 8. The first sensor 14 is used to detect the distance between the top surface of the head of the rivet and the bottom surface of the base 8. The second sensor 15 is arranged inside the telescopic rod 12 and close to the connecting rod 13. The second sensor 15 is used to detect the horizontal distance from the inside of the telescopic rod 12 to the bottom surface of the head of the rivet. The third sensor 16 is arranged inside the connecting rod 13 and faces the rivet. The third sensor 16 is used to detect the distance between the inside of the connecting rod 13 and the bottom surface of the head of the rivet. Specifically, when the rivet is inserted into the first housing 2 in place, the first driving member 5 is activated. The first driving member 5 drives the convex block 9 to move along the sliding groove 10. When the signal transmitted by the first sensor 14 reaches a preset value, and the preset value is 0, that is, when the distance between the top surface of the head of the rivet and the bottom surface of the base 8 is 0, at this time, the head of the rivet abuts against the base 8. The control mechanism 4 receives the signal of the first sensor 14 and controls the first driving member 5 to stop. After the first driving member 5 stops, the control mechanism 4 controls the second driving member 6 to start. The second driving member 6 drives the telescopic rod 12 to move along the extending direction of the fixing rod 11. When the signal transmitted by the second sensor 15 reaches a preset value, at this time, the detection horizontal plane of the second sensor 15 coincides with the bottom surface of the head of the rivet. That is, before installing the rivet, it is necessary to first measure the horizontal distance between the bottom surface of the head of the rivet and the second sensor 15 when the rivet is on the longitudinal center line of the base 8. This horizontal distance is the preset value of the signal transmitted by the second sensor 15. The control mechanism 4 receives the signal of the second sensor 15 and controls the second driving member 6 to stop. After the second driving member 6 stops, the control mechanism 4 controls the third driving member 7 to start. The third driving member 7 drives the connecting rod 13 to rotate. At this time, the connecting rod 13 rotates towards the rivet. When the signal transmitted by the third sensor 16 reaches a preset value, and the preset value is 0, that is, the distance between the inside of the connecting rod 13 and the bottom surface of the head of the rivet is 0. At this time, the inside of the connecting rod 13 abuts against the bottom surface of the head of the rivet. The control mechanism 4 receives the signal of the third sensor 16 and controls the third driving member 7 to stop. At this time, the multi-stage clamping mechanism clamps the rivet. This device sets the multi-stage clamping mechanism to be able to expand and contract and be able to position rivets of different lengths, meeting the clamping of rivets of different lengths and improving the versatility of the device.

[0027] Refer to Figure 6 and Figure 7As shown, the telescopic locking mechanism includes a number of fourth driving members 17, telescopic members 18 and bases 19. A number of bases 19 are arranged at the upper and lower ends of the inner wall of the second housing 3, and the number of bases 19 at the upper and lower ends are respectively arranged evenly along the circumferences of the upper and lower ends of the second housing 3. The fourth driving members 17 and the telescopic members 18 are both arranged on the bases 19. The fourth driving members 17 are used to drive the telescopic members 18, and the telescopic members 18 move in a direction perpendicular to the bases 19. Refer to Figure 6 and Figure 8 As shown, the fixing mechanism includes a number of fixing components. Each fixing component includes four locking rods 21. A number of fixing components are arranged at the top of the telescopic members 18, and a number of fixing components are arranged at the edges of the telescopic members 18. The number of fixing components are arranged symmetrically in pairs with respect to the transverse and longitudinal centerlines of the telescopic members 18. Fifth driving members 20 are arranged at one ends of the four locking rods 21 close to the telescopic members 18. The fifth driving members 20 are used to drive the locking rods 21 to move towards the tool shank. Flexible members 22 are arranged at the tops of the four locking rods 21. The flexible members 22 are in contact with the tool shank. To ensure the smooth movement of the telescopic members 18 and that the longitudinal centerlines of the telescopic members 18 are in contact with the surface of the tool shank, a number of slots 28 are arranged at the tops of the telescopic members 18. The number of slots 28 are arranged corresponding to the flexible members 22. When the locking rods 21 are in a contracted state, the tops of the flexible members 22 are flush with the tops of the telescopic members 18.

[0028] Among them, the second position detection mechanism includes a fourth sensor 23 and a fifth sensor 24. A groove is provided at the central position of the telescopic member 18. The fourth sensor 23 is disposed in the groove, and the top of the fourth sensor 23 is flush with the top of the telescopic member 18. The fourth sensor 23 is used to detect the distance between the top of the telescopic member 18 and the surface of the tool holder. The fifth sensor 24 is embedded in the top of the locking rod 21. A through hole 29 is provided at the position corresponding to the fifth sensor 24 on the flexible member 22. The fifth sensor 24 is used to detect the distance between the top of the locking rod 21 and the surface of the tool holder. Specifically, after the pull stud is fixed, at this time, the third driving member 7 stops, and the control mechanism 4 controls the fourth driving member 17 to start. The fourth driving member 17 drives the telescopic member 18 to move towards the tool holder. When the signal transmitted by the fourth sensor 23 reaches a preset value, the preset value is 0, that is, the distance between the top of the telescopic member 18 and the surface of the tool holder is 0. At this time, the telescopic member 18 abuts against the tool holder. The control mechanism 4 receives the signal of the fourth sensor 23 and controls the fourth driving member 17 to stop. The telescopic locking mechanism realizes the clamping of the tool holder. After the first clamping of the tool holder is completed, at this time, the longitudinal center line of the telescopic member 18 contacts the surface of the tool holder, and there is no contact at the edge with the tool holder. After the fourth driving member 17 stops, the control mechanism 4 controls the fifth driving member 20 to start. The fifth driving member 20 drives the locking rod 21 to move towards the tool holder. When the signal transmitted by the fifth sensor 24 reaches a preset value, the preset value is 0, that is, the distance between the top of the locking rod 21 and the surface of the tool holder is 0. At this time, the flexible member 22 contacts the tool holder. The control mechanism 4 receives the signal of the fifth sensor 24 and controls the fifth driving member 20 to stop. The flexible member 22 can be rubber. Of course, the flexible member 22 can also be other flexible materials that can increase friction and have elasticity. It not only realizes the secondary clamping of the tool holder by the fixing mechanism, but also improves the friction between this device and the tool holder, and does not damage the surface of the tool holder, improving the stability of the tool holder installation and the stability during the movement of the tool holder.

[0029] Referring to Figure 1 As shown, a plurality of dynamic balance mechanisms are evenly embedded in the top of the second housing 3. The dynamic balance mechanism includes a sixth sensor 25 and a seventh sensor 26. The sixth sensor 25 and the seventh sensor 26 are symmetrically arranged along the longitudinal center line of the second housing 3. Both the sixth sensor 25 and the seventh sensor 26 are used to detect the distance between the top of the second housing 3 and the machine tool spindle. By comparing the signals transmitted by the sixth sensor 25 and the seventh sensor 26, the position of this device is adjusted to ensure that this device maintains a dynamic balance state during the movement process.

[0030] The first sensor 14, the second sensor 15, the third sensor 16, the fourth sensor 23, the fifth sensor 24, the sixth sensor 25, and the seventh sensor 26 in this device are all distance sensors, specifically, they can be radar ranging sensors, infrared ranging sensors, laser ranging sensors, or ultrasonic ranging sensors.

[0031] Of course, the end of the tool holder can also be not provided with a pull stud. In this case, only the locking system needs to clamp the tool holder.

[0032] This device is connected to the machine tool spindle by replacing the connector 1 and the first housing 2 with a tool holder. The tool holder is arranged in the second housing 3, so that the machine tool spindle is not directly connected to the tool holder, increasing the distance between the machine tool spindle and the tool holder, achieving the effect of extending the machine tool spindle, realizing the machining of any concave workpiece, and improving the working efficiency. This device is provided with a multi-stage clamping mechanism and a first position detection mechanism in the first housing 2, and a telescopic locking mechanism, a fixing mechanism, and a second position detection mechanism in the second housing 3. The control mechanism 4 receives the signal of the first position detection mechanism and controls the multi-stage clamping mechanism to clamp the pull stud. The control mechanism 4 controls the telescopic locking mechanism and the fixing mechanism to move towards the tool holder successively by receiving the signal of the second position detection mechanism to clamp the tool holder twice, improving the stability of the tool holder installation and the stability during the movement of the tool holder.

[0033] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0034] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A machine tool spindle extension clamping device, characterized in that, To achieve the connection between the machine tool spindle and the tool holder, it includes: A control mechanism (4); A housing assembly, which includes a connection head (1), a first housing (2), and a second housing (3) connected in sequence. The connection head (1) is inserted into the machine tool spindle. The interiors of the first housing (2) and the second housing (3) both have spaces for accommodating the tool holder, and the outer surface of the first housing (2) is a conical surface that mates with the inner conical surface of the machine tool spindle; A clamping system, which is arranged inside the first housing (2). The clamping system includes a multi-stage clamping mechanism and a first position detection mechanism. The first position detection mechanism detects the position of the pull stud on the tool holder. The control mechanism (4) receives the signal from the first position detection mechanism and controls the multi-stage clamping mechanism, and the multi-stage clamping mechanism is used to clamp the pull stud; A locking system, which includes a telescopic locking mechanism, a fixing mechanism, and a second position detection mechanism. The telescopic locking mechanism is arranged on the inner wall of the second housing (3). The fixing mechanism is arranged on the telescopic locking mechanism. The second position detection mechanism detects the positions of the telescopic locking mechanism and the fixing mechanism. The control mechanism (4) receives the signal from the second position detection mechanism, thereby controlling the telescopic locking mechanism and the fixing mechanism to act successively. The telescopic locking mechanism is used to clamp the tool holder, and the fixing mechanism is used to fix the clamped tool holder.

2. The machine tool spindle extension clamping device according to claim 1, wherein The multi-stage clamping mechanism includes a driving assembly, a sliding assembly, and a clamping assembly; The driving assembly includes a first driving member (5), a second driving member (6), and a third driving member (7); The sliding assembly includes a base (8), a cylindrical housing (27), and several bumps (9). The cylindrical housing (27) is arranged inside the first housing (2). The base (8) is embedded in the top of the cylindrical housing (27). The first driving member (5) is arranged in the base (8). Several bumps (9) are evenly arranged along the circumference of the base (8). Several chutes (10) are arranged on the inner wall of the cylindrical housing (27), and several chutes (10) are arranged corresponding to several bumps (9); The clamping assembly includes several fixing rods (11), a telescopic rod (12), and a connecting rod (13). Several fixing rods (11) are arranged at the bottom of the base (8). The telescopic rod (12) is slidably arranged inside the fixing rod (11). The connecting rod (13) is hinged to the bottom of the telescopic rod (12). The second driving member (6) is arranged in the fixing rod (11). The third driving member (7) is arranged at the hinged position of the connecting rod (13) and the telescopic rod (12); the axial length of the fixing rod (11) is less than the axial length of the head of the pull stud.

3. The machine tool spindle extension clamping device according to claim 2, characterized in that, The first position detection mechanism includes a first sensor (14), a second sensor (15), and a third sensor (16); The first sensor (14) is embedded at the center position of the bottom of the base (8), and the bottom surface of the first sensor (14) is flush with the bottom surface of the base (8). The first sensor (14) is used to detect the distance between the top surface of the head of the rivet and the bottom surface of the base (8). After the rivet is inserted into the first housing (2) in place, the first driving member (5) is activated. The first driving member (5) drives the convex block (9) to move along the sliding groove (10). When the signal transmitted by the first sensor (14) reaches a preset value, the control mechanism (4) receives the signal of the first sensor (14) and controls the first driving member (5) to stop; The second sensor (15) is arranged inside the telescopic rod (12) and is close to the connecting rod (13). The second sensor (15) is used to detect the horizontal distance from the inside of the telescopic rod (12) to the bottom surface of the head of the rivet. After the first driving member (5) stops, the control mechanism (4) controls the second driving member (6) to start. The second driving member (6) drives the telescopic rod (12) to move along the extension direction of the fixed rod (11). When the signal transmitted by the second sensor (15) reaches a preset value, the control mechanism (4) receives the signal of the second sensor (15) and controls the second driving member (6) to stop; The third sensor (16) is arranged inside the connecting rod (13) and faces the rivet. The third sensor (16) is used to detect the distance between the inside of the connecting rod (13) and the bottom surface of the head of the rivet. After the second driving member (6) stops, the control mechanism (4) controls the third driving member (7) to start. The third driving member (7) drives the connecting rod (13) to rotate. When the signal transmitted by the third sensor (16) reaches a preset value, the control mechanism (4) receives the signal of the third sensor (16) and controls the third driving member (7) to stop.

4. The machine tool spindle extension clamping device according to claim 3, wherein, The telescopic locking mechanism includes a plurality of fourth driving members (17), telescopic members (18) and bases (19). A plurality of the bases (19) are arranged at the upper and lower ends of the inner wall of the second housing (3), and the plurality of bases (19) at the upper and lower ends are respectively arranged circumferentially and uniformly along the upper and lower ends of the second housing (3). The fourth driving members (17) and the telescopic members (18) are both arranged on the bases (19). The fourth driving members (17) are used to drive the telescopic members (18), and the telescopic members (18) move in a direction perpendicular to the bases (19).

5. The machine tool spindle extension clamping device according to claim 4, characterized in that, The fixing mechanism includes a number of fixing components. Each fixing component includes four locking rods (21). A number of the fixing components are arranged on the top of the telescopic member (18). A number of the fixing components are arranged at the edge of the telescopic member (18). A number of the fixing components are symmetrically arranged in pairs with respect to the transverse and longitudinal center lines of the telescopic member (18). At one end of the four locking rods (21) close to the telescopic member (18), a fifth driving member (20) is provided. The fifth driving member (20) is used to drive the locking rods (21) to move towards the tool handle. A flexible member (22) is arranged on the tops of the four locking rods (21). The flexible member (22) is in contact with the tool handle.

6. The machine tool spindle extension clamping device according to claim 5, wherein, A number of slots (28) are arranged on the top of the telescopic member (18). The number of slots (28) is arranged corresponding to the flexible member (22). When the locking rods (21) are in a contracted state, the top of the flexible member (22) is flush with the top of the telescopic member (18).

7. A machine tool spindle extension clamping device according to claim 5, characterized in that, The second position detection mechanism includes a fourth sensor (23) and a fifth sensor (24); A groove is arranged at the central position of the telescopic member (18). The fourth sensor (23) is arranged in the groove. And the top of the fourth sensor (23) is flush with the top of the telescopic member (18). The fourth sensor (23) is used to detect the distance between the top of the telescopic member (18) and the surface of the tool handle. After the third driving member (7) stops, the control mechanism (4) controls the fourth driving member (17) to start. The fourth driving member (17) drives the telescopic member (18) to move towards the tool handle. When the signal transmitted by the fourth sensor (23) reaches a preset value, the control mechanism (4) receives the signal of the fourth sensor (23) and controls the fourth driving member (17) to stop; The fifth sensor (24) is embedded in the top of the locking rod (21). A through hole (29) is arranged at the position corresponding to the fifth sensor (24) on the flexible member (22). The fifth sensor (24) is used to detect the distance between the top of the locking rod and the surface of the tool handle. After the fourth driving member (17) stops, the control mechanism (4) controls the fifth driving member (20) to start. The fifth driving member (20) drives the locking rod (21) to move towards the tool handle. When the signal transmitted by the fifth sensor (24) reaches a preset value, the control mechanism (4) receives the signal of the fifth sensor (24) and controls the fifth driving member (20) to stop.

8. The machine tool spindle extension clamping device according to claim 1, characterized in that, A number of dynamic balance mechanisms are evenly embedded in the top of the second housing (3). The dynamic balance mechanism includes a sixth sensor (25) and a seventh sensor (26). The sixth sensor (25) and the seventh sensor (26) are symmetrically arranged along the longitudinal center line of the second housing (3). Both the sixth sensor (25) and the seventh sensor (26) are used to detect the distance between the top of the second housing (3) and the machine tool spindle.

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