A machine tool spindle extension clamping device

Abstract

The present application belongs to the technical field of clamps. In order to solve the problem that the existing machine tool is difficult to accurately reach the specified machining position when machining concave workpieces due to the length limitation of the tool system, a machine tool spindle extension clamping device is provided. The device includes a control mechanism, a housing assembly, a clamping system and a locking system. The housing assembly includes a connecting head, a first housing and a second housing connected in sequence. The clamping system includes a multi-stage clamping mechanism and a first position detection mechanism. The locking system includes a telescopic locking mechanism, a fixing mechanism and a second position detection mechanism. The control mechanism receives signals from the first position detection mechanism and the second position detection mechanism in sequence, thereby controlling the multi-stage clamping mechanism to clamp the draw stud, and controlling the telescopic locking mechanism and the fixing mechanism to clamp the tool shank in sequence. The device achieves the effect of extending the machine tool spindle, realizes the machining of any concave workpiece, and improves the work efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of clamps, in particular to a machine tool spindle extension clamping device. BACKGROUND

[0002] In the mechanical manufacturing process, the tool holder is a key intermediate connecting piece, which directly cooperates with the machine tool spindle, and the main function is to realize the precise positioning connection of the tool and the machine tool spindle. The end of the tool holder is provided with a pull pin, the pull pin includes a head and a rod part, the rod part connects the head of the pull pin and the tool holder, and the machine tool spindle is internally provided with a pull knife device, which can accurately clamp the pull pin on the tool holder, and through pulling the tool holder, the pull pin is clamped and positioned with the machine tool spindle.

[0003] For mechanical processing, especially numerical control processing, a set of efficient tool system is essential, but the numerical control machine tool has more stringent requirements for the tool system, which is embodied in the following aspects: high accuracy of tool changing and positioning is required; the tool system has high rigidity; the tool system is convenient to assemble, adjust, standardize, systematize and universalize, which is convenient for the installation of the tool on the turret and the tool magazine, simplifies the structure and action of the mechanical hand, reduces the manufacturing cost of the tool, reduces the number of tools, expands the application range of the tool, is conducive to numerical control programming and tool management.

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

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

[0006] The present application provides a machine tool spindle extension clamping device which realizes the connection of the machine tool spindle and the tool holder, which comprises:

[0007] A control mechanism;

[0008] A shell assembly, the shell assembly comprises a connecting head, a first shell and a second shell connected in sequence, the connecting head is inserted into the machine tool spindle, the first shell and the second shell both have a space for accommodating the tool holder inside, and the outer surface of the first shell is a conical surface matched with the inner conical surface of the machine tool spindle;

[0009] A clamping system is arranged in the first housing, the clamping system comprising a multi-stage clamping mechanism and a first position detection mechanism, the first position detection mechanism detecting the position of the pull pin on the shank, the control mechanism receiving the signal of the first position detection mechanism and controlling the multi-stage clamping mechanism, the multi-stage clamping mechanism being used to clamp the pull pin;

[0010] A locking system is arranged in the second housing, the locking system comprising a telescopic locking mechanism, a fixing mechanism and a second position detection mechanism, the telescopic locking mechanism being arranged on the inner wall of the second housing, the fixing mechanism being arranged on the telescopic locking mechanism, the second position detection mechanism detecting the position of the telescopic locking mechanism and the fixing mechanism, the control mechanism receiving the signal of the second position detection mechanism and controlling the telescopic locking mechanism and the fixing mechanism to act in sequence, the telescopic locking mechanism being used to clamp the shank, and the fixing mechanism being used to fix the clamped shank.

[0011] Optionally, the multi-stage clamping mechanism comprises a driving assembly, a sliding assembly and a clamping assembly.

[0012] The driving assembly comprises a first driving member, a second driving member and a third driving member.

[0013] The sliding assembly comprises a base, a cylindrical housing and a plurality of protrusions, the cylindrical housing being arranged in the first housing, the base being embedded on the top of the cylindrical housing, the first driving member being arranged in the base, the plurality of protrusions being evenly arranged along the circumference of the base, and the inner wall of the cylindrical housing being provided with a plurality of sliding grooves corresponding to the plurality of protrusions.

[0014] The clamping assembly comprises a plurality of fixing rods, a telescopic rod and a connecting rod, the plurality of fixing rods being arranged at the bottom of the base, the telescopic rod being slidingly arranged in the fixing rod, the connecting rod being hingedly connected to the bottom of the telescopic rod, the second driving member being arranged in the fixing rod, and the third driving member being 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 pin.

[0015] Optionally, the first position detection mechanism comprises a first sensor, a second sensor and a third sensor.

[0016] The first sensor is embedded in the center 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 to detect the distance between the top surface of the head of the puller and the bottom surface of the base. When the puller is inserted into the first housing, the first drive is activated, which drives the protrusion along the sliding groove. 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 drive to stop.

[0017] The second sensor is arranged on the inner side of the telescopic rod and close to the connecting rod. The second sensor is used to detect the horizontal distance between the inner side of the telescopic rod and the bottom surface of the head of the puller. When the first drive stops, the control mechanism controls the second drive to start, which drives the telescopic rod to move along the extension 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 drive to stop.

[0018] The third sensor is arranged on the inner side of the connecting rod and towards the puller. 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 puller. When the second drive stops, the control mechanism controls the third drive to start, which 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 drive to stop.

[0019] Optionally, the telescopic locking mechanism includes a plurality of fourth drives, telescopic members and bases. The plurality of bases are arranged on the upper and lower ends of the inner wall of the second housing, and the plurality of bases on the upper and lower ends are uniformly arranged along the circumferential direction of the upper and lower ends of the second housing, respectively. The fourth drive and the telescopic member are arranged on the base. The fourth drive is used to drive the telescopic member, and the telescopic member moves in a direction perpendicular to the base.

[0020] Optionally, the fixing mechanism includes a plurality of fixing assemblies. The fixing assembly includes four locking rods. The plurality of fixing assemblies are arranged on the top of the telescopic member, and the plurality of fixing assemblies are arranged at the edges of the telescopic member. The plurality of fixing assemblies are symmetrically arranged with respect to the transverse and longitudinal center lines of the telescopic member. The four locking rods are close to one end of the telescopic member and are provided with a fifth drive. The fifth drive is used to drive the locking rod to move towards the handle. The top of the four locking rods is provided with a flexible member, which is in contact with the handle.

[0021] Optionally, the top of the telescopic part is provided with a plurality of grooves, and the plurality of grooves correspond to the flexible part; when the locking rod is in the retracted state, the top of the flexible part is flush with the top of the telescopic part.

[0022] Optionally, the second position detection mechanism comprises a fourth sensor and a fifth sensor.

[0023] The telescopic part is provided with a groove at the center position, the fourth sensor is arranged in the groove, and the top of the fourth sensor is flush with the top of the telescopic part; the fourth sensor is used to detect the distance between the top of the telescopic part and the surface of the tool holder; after the third driving part stops, the control mechanism controls the fourth driving part to start, and the fourth driving part drives the telescopic part 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 part to stop.

[0024] The fifth sensor is embedded in the top of the locking rod, the flexible part is provided with a through hole at a position corresponding to the fifth sensor, and 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 part stops, the control mechanism controls the fifth driving part to start, and the fifth driving part 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 part to stop.

[0025] Optionally, the top of the second housing is uniformly embedded with a plurality of dynamic balancing mechanisms, the dynamic balancing mechanism comprises 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, and 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.

[0026] Compared with the prior art, the technical scheme provided by the embodiment of the application has the following beneficial effects:

[0027] An embodiment of the present invention provides a machine tool spindle extension clamping device, which connects to the machine tool spindle by replacing the connecting head and the first shell with a tool holder, and the tool holder is arranged in the second shell, so that the machine tool spindle is not directly connected to the tool holder, thereby 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 shell, and a telescopic locking mechanism, a fixing mechanism and a second position detection mechanism in the second shell. The control mechanism receives the signal of the first position detection mechanism and controls the multi-stage clamping mechanism, thereby clamping the rivet. The control mechanism controls the telescopic locking mechanism and the fixing mechanism to move toward the tool holder in succession by receiving the signal of the second position detection mechanism, so as to clamp the tool holder twice, thereby improving the stability of the tool holder installation and the stability of the tool holder during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 This is a schematic structural diagram of a machine tool spindle extension clamping device according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 Cross-sectional view along the AA axis;

[0032] Figure 3 Schematic diagram of the structure of the multi-stage clamping mechanism according to an embodiment of the present invention;

[0033] Figure 4 for Figure 3 Cross-sectional view along the BB direction;

[0034] Figure 5 This is a schematic structural diagram of a clamping assembly according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic structural diagram of a locking system according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the installation of the fourth driving member on the base according to an embodiment of the present invention;

[0037] Figure 8 The structure diagram of the locking rod is shown in the embodiment of the present application.

[0038] Wherein, 1, connecting head; 2, first shell; 3, second shell; 4, control mechanism; 5, first driving member; 6, second driving member; 7, third driving member; 8, base; 9, protrusion; 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 shell; 28, slot; 29, through hole. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the schemes of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other different manners from those described herein; obviously, the embodiments in the description are only some embodiments of the present application, rather than all the embodiments.

[0041] Reference Figure 1 and Figure 2 As shown in the present embodiment, a machine tool spindle extension clamping device is provided, which realizes the connection of the machine tool spindle and the tool shank, and comprises a control mechanism 4, a shell assembly, a clamping system and a locking system.

[0042] Reference Figure 1 and Figure 2 As shown in the present embodiment, the shell assembly comprises a connecting head 1, a first shell 2 and a second shell 3 connected in sequence, the connecting head 1 is similar to a drawn nail, the connecting head 1 is inserted into the machine tool spindle, the interiors of the first shell 2 and the second shell 3 each have a space for accommodating the tool shank, and the outer surface of the first shell 2 is a conical surface matched with the inner conical surface of the machine tool spindle, the conical surface of the first shell 2 can ensure that the device can be quickly and accurately aligned with the machine tool spindle when the device is inserted into the machine tool spindle for fixation, when the conical surface of the first shell 2 is matched with the inner conical surface of the machine tool spindle, a large friction force is generated through axial pressure, and the friction force and the pressure can realize the connection of the first shell 2 and the machine tool spindle, so that the first shell 2 will not be loose, this matching mode can bear a large axial load and radial load, has high rigidity and bearing capacity, in addition, the conical connection can effectively transmit torque, so that the device can stably rotate.

[0043] Referring to Figure 2 As shown in the drawings, the clamping system is arranged in the first housing 2, the clamping system comprises a multi-stage clamping mechanism and a first position detection mechanism, the first position detection mechanism detects the position of the pull pin on the tool holder, the control mechanism 4 receives the signal of the first position detection mechanism and controls the multi-stage clamping mechanism, the multi-stage clamping mechanism is used for clamping the pull pin, the locking system comprises 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 position of the telescopic locking mechanism and the fixing mechanism, the control mechanism 4 receives the signal of the second position detection mechanism to control the telescopic locking mechanism and the fixing mechanism to act in sequence, the telescopic locking mechanism is used for clamping the tool holder, and the fixing mechanism is used for fixing the clamped tool holder.

[0044] Among them, the control mechanism 4 is arranged in the connecting head 1, the first position detection mechanism and the second position detection mechanism are connected with the control mechanism 4, and the control mechanism 4 receives the signal of the second position detection mechanism to control the telescopic locking mechanism and the fixing mechanism to move in sequence and abut against the tool holder.

[0045] Specifically, the multi-stage clamping mechanism comprises a driving assembly, a sliding assembly and a clamping assembly, the driving assembly comprises a first driving piece 5, a second driving piece 6 and a third driving piece 7, referring to Figure 3 and Figure 4 The sliding assembly comprises a base 8, a cylindrical housing 27 and a plurality of protrusions 9, the cylindrical housing 27 is arranged in the first housing 2, the base 8 is embedded on the top of the cylindrical housing 27, the first driving piece 5 is arranged in the base 8, the plurality of protrusions 9 are uniformly arranged along the circumference of the base 8, and a plurality of sliding grooves 10 are arranged on the inner wall of the cylindrical housing 27, the plurality of sliding grooves 10 are arranged correspondingly to the plurality of protrusions 9, the first driving piece 5 drives the protrusions 9 to move along the sliding grooves 10, referring to Figure 4 and Figure 5 The clamping assembly comprises a plurality of fixed rods 11, a telescopic rod 12 and a connecting rod 13, the plurality of fixed rods 11 are arranged at the bottom of the base 8, the telescopic rod 12 is slidingly arranged in the fixed rod 11, the telescopic rod 12 can be a multi-stage sliding rod, the connecting rod 13 is hingedly connected with the bottom of the telescopic rod 12, the second driving piece 6 is arranged in the fixed rod 11, the second driving piece 6 drives the telescopic rod 12 to move in the vertical direction of the fixed rod 11, and the third driving piece 7 is arranged at the hinged position of the connecting rod 13 and the telescopic rod 12, and the third driving piece 7 drives the connecting rod 13 to rotate.

[0046] Further, the axial length of the fixed rod 11 is less than the axial length of the head of the drawbar, the first position detection mechanism comprises a first sensor 14, a second sensor 15 and a third sensor 16, the first sensor 14 is embedded at the central 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 drawbar and the bottom surface of the base 8, the second sensor 15 is arranged on the inner side of the telescopic rod 12 and close to the connecting rod 13, the second sensor 15 is used to detect the horizontal distance from the inner side of the telescopic rod 12 to the bottom surface of the head of the drawbar, the third sensor 16 is arranged on the inner side of the connecting rod 13 and faces the drawbar, the third sensor 16 is used to detect the distance between the inner side of the connecting rod 13 and the bottom surface of the head of the drawbar, specifically, when the drawbar is inserted into the first housing 2 to the position, the first driving part 5 is started, the first driving part 5 drives the lug 9 to move along the sliding groove 10, when the signal transmitted by the first sensor 14 reaches the preset value, the preset value is 0, that is, the distance between the top surface of the head of the drawbar and the bottom surface of the base 8 is 0, at this time, the head of the drawbar abuts against the base 8, the control mechanism 4 receives the signal of the first sensor 14 and controls the first driving part 5 to stop, when the first driving part 5 stops, the control mechanism 4 controls the second driving part 6 to start, the second driving part 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 the preset value, at this time, the detection horizontal plane of the second sensor 15 coincides with the bottom surface of the head of the drawbar, that is, before installing the drawbar, the horizontal distance between the bottom surface of the head of the drawbar and the second sensor 15 when the drawbar is on the longitudinal center line of the base 8 needs to be measured, 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 part 6 to stop, when the second driving part 6 stops, the control mechanism 4 controls the third driving part 7 to start, the third driving part 7 drives the connecting rod 13 to rotate, at this time, the connecting rod 13 rotates towards the drawbar, when the signal transmitted by the third sensor 16 reaches the preset value, the preset value is 0, that is, the distance between the inner side of the connecting rod 13 and the bottom surface of the head of the drawbar is 0, at this time, the inner side of the connecting rod 13 abuts against the bottom surface of the head of the drawbar, the control mechanism 4 receives the signal of the third sensor 16 and controls the third driving part 7 to stop, at this time, the multi-stage clamping mechanism clamps the drawbar, the device sets the multi-stage clamping mechanism to be able to stretch and retract and to be able to position drawbars of different lengths, which satisfies the clamping of drawbars of different lengths and improves the universality of the device.

[0047] Referring to Figure 6 and Figure 7As shown, the telescopic locking mechanism comprises a plurality of fourth driving members 17, a telescopic member 18 and a plurality of bases 19, the plurality of bases 19 are arranged at the upper and lower ends of the inner wall of the second shell 3, and the plurality of bases 19 at the upper and lower ends are evenly arranged along the circumferences of the upper and lower ends of the second shell 3 respectively, the fourth driving members 17 and the telescopic member 18 are arranged on the bases 19, the fourth driving members 17 are used to drive the telescopic member 18, and the telescopic member 18 moves in a direction perpendicular to the bases 19. For reference Figure 6 and Figure 8 As shown, the fixing mechanism comprises a plurality of fixing assemblies, the fixing assembly comprises four locking rods 21, the plurality of fixing assemblies are arranged at the top of the telescopic member 18, the plurality of fixing assemblies are arranged at the edges of the telescopic member 18, the plurality of fixing assemblies are symmetrically arranged with respect to the transverse and longitudinal center lines of the telescopic member 18, the four locking rods 21 are provided with fifth driving members 20 at one end close to the telescopic member 18, the fifth driving members 20 are used to drive the locking rods 21 to move towards the handle, the top of the four locking rods 21 is provided with flexible members 22, the flexible members 22 are in contact with the handle, in order to ensure the smooth movement of the telescopic member 18, and the longitudinal center line of the telescopic member 18 is in contact with the surface of the handle, the top of the telescopic member 18 is provided with a plurality of grooves 28, the plurality of grooves 28 are arranged corresponding to the flexible members 22, when the locking rods 21 are in the retracted state, the top of the flexible members 22 is flush with the top of the telescopic member 18.

[0048] The second position detection mechanism comprises a fourth sensor 23 and a fifth sensor 24, a groove is arranged at the center position of the telescopic part 18, the fourth sensor 23 is arranged in the groove, the top of the fourth sensor 23 is flush with the top of the telescopic part 18, the fourth sensor 23 is used for detecting the distance between the top of the telescopic part 18 and the surface of the shank, the fifth sensor 24 is embedded at 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 part 22, the fifth sensor 24 is used for detecting the distance between the top of the locking rod 21 and the surface of the shank, specifically, when the draw bolt is fixed, at this time, the third driving part 7 stops, the control mechanism 4 controls the fourth driving part 17 to start, the fourth driving part 17 drives the telescopic part 18 to move towards the shank, 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 part 18 and the surface of the shank is 0, at this time, the telescopic locking mechanism realizes the clamping of the shank, when the first clamping of the shank is completed, at this time, the longitudinal center line of the telescopic part 18 is in contact with the surface of the shank, and the edge is not in contact with the shank, after the fourth driving part 17 stops, the control mechanism 4 controls the fifth driving part 20 to start, the fifth driving part 20 drives the locking rod 21 to move towards the shank, 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 shank is 0, at this time, the flexible part 22 is in contact with the shank, the control mechanism 4 receives the signal of the fifth sensor 24 and controls the fifth driving part 20 to stop, the flexible part 22 can be rubber, of course, the flexible part 22 can also be other flexible materials that can increase friction and have elasticity, which realizes the second clamping of the shank by the fixing mechanism, improves the friction between the device and the shank, and does not damage the surface of the shank, improves the stability of the shank installation and the stability of the shank movement.

[0049] Referring to Figure 1 As shown in the figure, the top of the second shell 3 is uniformly embedded with a plurality of dynamic balancing mechanisms, the dynamic balancing mechanisms comprise 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 shell 3, the sixth sensor 25 and the seventh sensor 26 are both used for detecting the distance between the top of the second shell 3 and the main shaft of the machine tool, by comparing the signals transmitted by the sixth sensor 25 and the seventh sensor 26, the position of the device is adjusted, and the dynamic balance state of the device in the movement process is ensured.

[0050] 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 the device are all distance sensors, which can be radar distance sensors, infrared distance sensors, laser distance sensors or ultrasonic distance sensors.

[0051] Of course, the end of the tool holder can also not be provided with the pull pin, at which time only the locking system is needed to clamp the tool holder.

[0052] The device replaces the connecting head 1 and the first shell 2 with the tool holder connected with the machine tool spindle, and the tool holder is arranged in the second shell 3, so that the machine tool spindle is not directly connected with the tool holder, the distance between the machine tool spindle and the tool holder is increased, the effect of extending the machine tool spindle is achieved, the machining of any concave workpiece is realized, and the work efficiency is improved. The device is provided with the multi-stage clamping mechanism and the first position detection mechanism in the first shell 2, is provided with the telescopic locking mechanism, the fixing mechanism and the second position detection mechanism in the second shell 3, the control mechanism 4 receives the signal of the first position detection mechanism and controls the multi-stage clamping mechanism, so as to realize the clamping of the pull pin, the control mechanism 4 receives the signal of the second position detection mechanism, so as to control the telescopic locking mechanism and the fixing mechanism to move towards the tool holder in sequence, so as to clamp the tool holder twice, and the stability of the tool holder installation and the stability of the tool holder during movement are improved.

[0053] It should be noted that, in the present document, relational terms such as“first” and“second”, and the like, can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms“comprises”,“comprising”, or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by“comprises a...” does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0054] The above description is merely one specific implementation of the application, which enables a person skilled in the art to understand or implement the application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the application will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A machine tool spindle extension clamping device, characterized in that: The connection between the machine tool spindle and the tool handle is realized, which includes: Control mechanism (4); A housing assembly, the housing assembly comprising a connector (1), a first housing (2) and a second housing (3) connected in sequence, the connector (1) being inserted into the machine tool spindle, the interiors of the first housing (2) and the second housing (3) both having spaces for accommodating the tool holder, and the outer surface of the first housing (2) being a conical surface that matches the inner conical surface of the machine tool spindle; A clamping system, the clamping system being arranged in the first housing (2), the clamping system comprising a multi-stage clamping mechanism and a first position detection mechanism, the first position detection mechanism detecting the position of the pull nail on the tool handle, the control mechanism (4) receiving a signal from the first position detection mechanism and controlling the multi-stage clamping mechanism, the multi-stage clamping mechanism being used to clamp the pull nail; A locking system, the locking system comprising a telescopic locking mechanism, a fixing mechanism and a second position detection mechanism, the telescopic locking mechanism being arranged on the inner wall of the second shell (3), the fixing mechanism being arranged on the telescopic locking mechanism, the second position detection mechanism detecting the positions of the telescopic locking mechanism and the fixing mechanism, the control mechanism (4) receiving a signal from the second position detection mechanism, thereby controlling the telescopic locking mechanism and the fixing mechanism to act successively, the telescopic locking mechanism being used to clamp the knife handle, and the fixing mechanism being used to fix the clamped knife handle; The telescopic locking mechanism comprises a plurality of fourth driving members (17), a telescopic member (18) and a base (19), wherein the plurality of bases (19) are arranged at the upper and lower ends of the inner wall of the second shell (3), and the plurality of bases (19) at the upper and lower ends are respectively evenly arranged along the circumference of the upper and lower ends of the second shell (3), the fourth driving member (17) and the telescopic member (18) are both arranged on the base (19), the fourth driving member (17) is used to drive the telescopic member (18), and the telescopic member (18) moves in a direction perpendicular to the base (19); The fixing mechanism includes a plurality of fixing components, and the fixing components include four locking rods (21). A plurality of the fixing components are arranged at the top of the telescopic member (18), and a plurality of the fixing components are arranged at the edge of the telescopic member (18). The plurality of the fixing components are symmetrically arranged in pairs relative to the transverse and longitudinal center lines of the telescopic member (18). The four locking rods (21) are each provided with a fifth driving member (20) at one end close to the telescopic member (18). The fifth driving member (20) is used to drive the locking rod (21) to move toward the knife handle. A flexible member (22) is provided at the top of the four locking rods (21), and the flexible member (22) is in contact with the knife handle.

2. A machine tool spindle extension clamping device according to claim 1, characterized in that: The multi-stage clamping mechanism includes a driving assembly, a sliding assembly and a clamping assembly; The driving assembly comprises 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 shell (27) and a plurality of protrusions (9), wherein the cylindrical shell (27) is arranged in the first shell (2), the base (8) is embedded in the top of the cylindrical shell (27), the first driving member (5) is arranged in the base (8), the plurality of protrusions (9) are evenly arranged along the circumference of the base (8), and the inner wall of the cylindrical shell (27) is provided with a plurality of sliding grooves (10), and the plurality of sliding grooves (10) are arranged corresponding to the plurality of protrusions (9); The clamping assembly comprises a plurality of fixed rods (11), telescopic rods (12) and connecting rods (13); the plurality of fixed rods (11) are arranged at the bottom of the base (8); the telescopic rods (12) are slidably arranged in the fixed rods (11); the connecting rods (13) are hingedly connected to the bottom of the telescopic rods (12); the second driving member (6) is arranged in the fixed rod (11); and the third driving member (7) is arranged at the hinged position between the connecting rod (13) and the telescopic rod (12); the axial length of the fixed rod (11) is less than the axial length of the head of the rivet.

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 in the center 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). When the rivet is inserted into the first shell (2) and is in place, the first driving member (5) is started, and the first driving member (5) drives the protrusion (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 on the inner side of the telescopic rod (12) and is arranged close to the connecting rod (13). The second sensor (15) is used to detect the horizontal distance from the inner side of the telescopic rod (12) to the bottom surface of the head of the rivet. When 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 on the inner side of the connecting rod (13) and is arranged toward the pull nail. The third sensor (16) is used to detect the distance between the inner side of the connecting rod (13) and the bottom surface of the head of the pull nail. When the second driving member (6) stops, the control mechanism (4) controls the third driving member (7) to start, and 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. A machine tool spindle extension clamping device according to claim 2 or 3, characterized in that: The top of the telescopic member (18) is provided with a plurality of slots (28), and the plurality of slots (28) are provided corresponding to the flexible member (22). When the locking rod (21) is in a retracted state, the top of the flexible member (22) is flush with the top of the telescopic member (18).

5. The machine tool spindle extension clamping device according to claim 4, characterized in that: The second position detection mechanism includes a fourth sensor (23) and a fifth sensor (24); A groove is provided at the center of the telescopic member (18), the fourth sensor (23) is provided 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, when 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 toward 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), and a through hole (29) is opened on the flexible member (22) at a position corresponding to the fifth sensor (24). The fifth sensor (24) is used to detect the distance between the top of the locking rod (21) and the surface of the knife handle. When the fourth driving member (17) stops, the control mechanism (4) controls the fifth driving member (20) to start, and the fifth driving member (20) drives the locking rod (21) to move toward the knife 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.

6. The machine tool spindle extension clamping device according to claim 1, characterized in that: A plurality of dynamic balancing mechanisms are evenly embedded on the top of the second shell (3), and the dynamic balancing mechanisms include 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 shell (3). The sixth sensor (25) and the seventh sensor (26) are both used to detect the distance between the top of the second shell (3) and the main shaft of the machine tool.

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