Internal expansion type cutter clamping device

Abstract

The invention discloses an internal expansion type tool clamping device, relates to the technical field of tool clamping, and aims to solve the technical problems that a current device adopts a single fixing mechanism, is poor in universality and is difficult to meet the fixing requirements of tools of different specifications and types. Through the design of the distraction assembly, the deformation internal expansion assembly and the insertion block positioning structure, the deformation internal expansion assembly and the distraction assembly are matched through inclined planes to achieve efficient expansion and contraction conversion; the insertion block positioning structure is integrated on the opening assembly, limiting and locking are completed through a buckle, and other types of tools are positioned through the buckle. According to the tool fixing device, the expanding and contracting function and the positioning and locking function are integrated, a double fixing mechanism of radial expanding and circumferential buckling is formed, the fixing structure can be switched according to the specific types of tools, the fixing requirements of the tools of different specifications are met, and the tool fixing reliability is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tool clamping, in particular to an internal expansion type tool clamping device. BACKGROUND

[0002] In modern manufacturing industry, the precision, efficiency and reliability of machining directly determine the product quality and production efficiency, and the tool clamping device as the core component connecting the spindle of the machine tool and the tool plays a decisive role in the machining quality. The internal expansion type tool clamping device is based on the core principle of internal expansion, and realizes the wrapping type fixing of the tool through the radial expansion of the internal components. Compared with the traditional clamping method, it has the advantages of high clamping precision, strong stability and small damage to the tool.

[0003] However, the existing device often only adopts a single fixing mechanism of simple radial expansion, and the fixing structure can only adapt to a single type of tool fixed by internal expansion. When a tool with a clamping groove needs to be fixed, other equipment must be used for clamping, which has poor universality and cannot meet the diversified fixing needs of tools of different specifications and types. In view of this, an internal expansion type tool clamping device is proposed. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art, adapt to the actual needs, and provide an internal expansion type tool clamping device to solve the technical problem that the existing device adopts a single fixing mechanism, has poor universality, and cannot meet the fixing needs of tools of different specifications and types.

[0005] To solve the above technical problems, the present application provides the following technical scheme: an internal expansion type tool clamping device, comprising a spreading component, a deformed internal expansion component and an insert block positioning structure; The deformed internal expansion component is slidingly arranged outside the spreading component. When the deformed internal expansion component moves axially on the spreading component, the expansion sleeve end of the deformed internal expansion component expands and contracts in cooperation with the inclined surface of the spreading component. The insert block positioning structure is arranged on the spreading component. The insert block positioning structure has a retracted state and an extended state. When the insert block positioning structure is in the retracted state, the positioning part of the insert block positioning structure is retracted into the spreading component. When the insert block positioning structure is in the extended state, the slider of the insert block positioning structure is rotated by the rotary drive of the spreading component, and the positioning part of the insert block positioning structure is extended to the outside of the spreading component to form a tool clamping part.

[0006] Preferably, the spreading component has an initial state and a deformed state. When the spreading component is in the initial state, the front end of the spreading component is retracted to form a conical cylinder structure. When the spreading component is in the deformed state, the front end of the spreading component is expanded to form a horn structure. The deformed inner expanding assembly has a first expansion state and a second expansion state, and presents a columnar structure when the deformed inner expanding assembly is in the first expansion state, and presents a horn structure when the deformed inner expanding assembly is in the second expansion state; the expansion assembly drives the deformed inner expanding assembly to be in the first expansion state through the conical cylinder structure when the expansion assembly is in the initial state and is moved in the axial direction; the expansion assembly drives the deformed inner expanding assembly to be in the second expansion state through the horn structure when the expansion assembly is in the deformed state.

[0007] Preferably, the expansion assembly comprises a fixed seat, a rear end expansion piece of the expansion sleeve, and a head end expansion structure of the expansion sleeve. The rear end expansion piece of the expansion sleeve is movably connected to the front end of the fixed seat, the head end expansion structure of the expansion sleeve is located at the front end of the rear end expansion piece of the expansion sleeve, the rear end expansion piece of the expansion sleeve and the head end expansion structure of the expansion sleeve present a conical cylinder structure, and the conical cylinder structure is used to drive the deformed inner expanding assembly to be deformed to the first expansion state.

[0008] Preferably, the head end expansion structure of the expansion sleeve comprises a mounting cylinder, an expansion plate, a connecting piece, a driving connecting rod, a driving rod, and a telescopic driving unit. The mounting cylinder is mounted at the front end of the rear end expansion piece of the expansion sleeve, and the mounting cylinder is a hollow cylindrical structure; a plurality of expansion plates are arranged equidistantly and annularly on the side wall of the mounting cylinder; the middle part of each of the plurality of expansion plates is movably connected to a connecting piece, and each of the plurality of connecting pieces is mounted on the inner wall of the mounting cylinder; one end of each of the plurality of driving connecting rods is movably connected to one of the plurality of expansion plates; the other end of each of the plurality of driving connecting rods is movably connected to the head end of the driving rod equidistantly and annularly; the driving rod is slidably connected to the rear end expansion piece of the expansion sleeve; and the telescopic driving unit is mounted on the rear end expansion piece of the expansion sleeve, and the output end of the telescopic driving unit is connected to the tail end of the driving rod. When the expansion assembly is in the initial state, the plurality of expansion plates are retracted to be flush with the side wall of the mounting cylinder; when the expansion assembly is in the deformed state, the plurality of driving connecting rods drive the plurality of expansion plates to protrude to the outside of the mounting cylinder, and the mounting cylinder and the plurality of expansion plates present a horn structure, which is used to drive the deformed inner expanding assembly to be deformed to the second expansion state.

[0009] Preferably, the deformed inner expanding assembly comprises an expansion sleeve structure, a connecting soft sleeve, and a longitudinal driving component. A plurality of expansion sleeve structures are arranged equidistantly and annularly on the outside of the mounting cylinder; a plurality of connecting soft sleeves are connected between the plurality of expansion sleeve structures; a plurality of expansion sleeve structures are arranged equidistantly and annularly at the head end of the longitudinal driving component; and the longitudinal driving component is slidably connected to the fixed seat; when the deformed inner expanding assembly is in the first expansion state, the plurality of expansion sleeve structures and the plurality of connecting soft sleeves present a columnar structure, which is used to fix a tool with a cylindrical hole in an inner expanding manner.

[0010] Preferably, the expanding sleeve structure comprises inner expanding ends and rotating ends; The inner expanding ends are connected to the head end of the longitudinal driving component in equidistant annular form, one end of each of the rotating ends is rotatably connected to each of the inner expanding ends, and an inclined surface is formed at the connection between the inner expanding end and the rotating end. The rotating ends are rotated towards the direction away from the mounting cylinder. When the deformed inner expanding assembly is in the second expansion state, the front ends of the rotating ends and the connecting soft sleeves are in a bell-shaped structure, and the bell-shaped structure is used for fixedly mounting a tool with a bell-shaped hole.

[0011] Preferably, the expanding sleeve structure further comprises guide rods, guide grooves and return springs; The guide rods are respectively mounted on the rotating ends, the guide grooves are respectively formed on the inclined surfaces of the inner expanding ends, and the guide rods are respectively slidably connected in the guide grooves. The guide rods and the guide grooves are connected by the return springs. The guide rods are in a curved rod structure.

[0012] Preferably, the inserting block positioning structure comprises sliding blocks, curved arms, reciprocating connecting rods, sliding rods and positioning components; The sliding blocks are respectively slidably connected to the inner sides of the inner expanding ends. The curved arms are respectively mounted on the sliding blocks and slidably connected to the inner sides of the inner expanding ends. The two ends of the curved arms are respectively movably connected to the reciprocating connecting rods. The reciprocating connecting rods are movably connected to the sliding rods. The sliding rods are slidably connected to the inner expanding ends. The positioning components are mounted on the ends of the sliding rods and movably connected to the recesses formed on the surfaces of the inner expanding ends. When the inserting block positioning structure is in the retracted state, the positioning components are retracted into the recesses. When the inserting block positioning structure is in the extended state, the positioning components are extended out of the recesses in a protruding buckle structure, and the protruding buckle structure is used for fixedly mounting a tool with a corresponding recess.

[0013] Preferably, equidistant annular limiting sliding grooves are formed on the expanding sleeve rear end expansion member. The sliding blocks are slidably connected in the limiting sliding grooves. The output end of the rotary driving unit is connected to the expanding sleeve rear end expansion member, and the rotary driving unit is mounted on the fixed seat.

[0014] Preferably, the positioning components comprise first positioning blocks and second positioning blocks. The first positioning blocks are all hexagonal column structures, and the second positioning blocks are all circular truncated cone structures. One first positioning block and one second positioning block are arranged on each side of the inner expanding end.

[0015] Compared with the prior art, the present application has the following advantages: 1. This invention, through the design of an expansion component, a deformable internal expansion component, and a positioning block structure, achieves efficient expansion and contraction switching between the deformable internal expansion component and the expansion component via inclined surface cooperation. The positioning block structure is integrated into the expansion component and achieves limiting and locking through a snap-fit ​​mechanism, enabling the snap-fit ​​positioning of other types of cutting tools. This invention integrates expansion, contraction, and positioning locking functions into one unit, forming a dual fixing mechanism of radial tension and circumferential snap-fit. The fixing structure can be switched according to the specific type of cutting tool, adapting to the fixing requirements of different specifications of cutting tools and ensuring the reliability of tool fixing.

[0016] 2. This invention utilizes the design of a spreading component and a deformable internal expansion component. The spreading component initially presents a conical structure, while its deformed state is a trumpet-shaped structure. The deformable internal expansion component presents a columnar structure in its first spreading state and a trumpet-shaped structure in its second spreading state. These two components are linked through structural adaptation. When the spreading component is in its initial conical structure and moves axially, it drives the deformable internal expansion component to switch to the first spreading columnar state, completing the adaptation and fixation of one type of tool. When the spreading component switches to the deformable trumpet-shaped structure, it drives the deformable internal expansion component to switch to the second spreading trumpet-shaped state through structural adaptation, achieving the adaptation and fixation of another type of tool. This invention, through the design of the spreading component and the deformable internal expansion component, achieves internal expansion fixation of different tools through structural adaptation in different states, adapting to the industrial application needs of fixing different specifications of tools in the fields of machining and automated equipment.

[0017] 3. This invention, through the design of the expanding component and the deformable inner expansion component, allows for the following: When the longitudinal driving component moves the deformable inner expansion component axially, and the expanding component is in its initial state, the tapered expansion sleeve's rear end expanding member and the retracting expanding plate push the inner expansion end of the expansion sleeve structure to retract synchronously, adapting to the inner expansion and fixation of cylindrical hole tools. When it is necessary to fix a trumpet-shaped hole tool, the expansion sleeve's head end expanding structure transforms into a trumpet-shaped deformed state, while the deformable inner expansion component fits against this trumpet-shaped structure. The six rotating ends and the front end of the connecting soft sleeve form a second trumpet-shaped expanding state, achieving full-fitting inner expansion and fixation of the trumpet-shaped hole tool. This invention, through the switching between tapered and trumpet-shaped forms of the expanding component and the graded adaptation of the cylindrical and trumpet-shaped forms of the deformable inner expansion component, can achieve precise fixation of tools with different hole shapes without complex adjustments. The guide rod and crank design of the expansion sleeve structure, in conjunction with the return spring, ensures a smooth and controllable deformation process and precise reset.

[0018] 4、The present application is through the design of the plug-in block positioning structure, the plug-in block positioning structure is in the contraction state, the positioning part is retracted into the groove without interfering with the internal expansion action, and in the extension state, it is in the form of a protruding buckle structure, which can precisely buckle the corresponding shape groove cutter, and can also form double locking of internal expansion fixation and buckle positioning. The present application solves the defects of traditional internal expansion structure that can only adapt to single hole shape and insufficient fixation stability by designing the plug-in block positioning structure, and can adapt to the fixation scene of various specifications of cutters with grooves and without grooves.

[0019] 5、The present application is through the design of the positioning part, the positioning part adopts double form design, the first positioning block is a hexagonal column structure, and the second positioning block is a circular table structure, which are retracted into the internal expansion end groove without interfering with the internal expansion action when contracted, and can be adapted and clamped according to the shape of the cutter groove when extended. The existing buckle fixed cutters often have hexagonal grooves or circular table grooves, the hexagonal grooves have large contact area, high circumferential positioning precision and strong torque transmission capacity, and are suitable for cutters that can withstand large torque, the circular table grooves have high positioning precision and good self-centering effect, and the torque transmission capacity is better than that of a cylindrical pin. The hexagonal positioning block and the circular table positioning block correspond to two kinds of grooves respectively. The present application deeply integrates the hierarchical internal expansion adaptation, precise buckle positioning and double form positioning adaptation, solves the defects of traditional internal expansion structure that adapts to single and fixed positioning form, and improves the fixation reliability under high-speed cutting and vibration working conditions through the double fixation mechanism. It can adapt to various specifications of cutters with cylindrical / horn-shaped holes, hexagonal / circular table-shaped grooves and no grooves. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present application.

[0021] Figure 2 It is a structural schematic diagram of the present application.

[0022] Figure 3 It is a structural schematic diagram of the present application.

[0023] Figure 4 It is a structural schematic diagram of the present application.

[0024] Figure 5 It is a structural schematic diagram of the present application.

[0025] Figure 6 It is a structural schematic diagram of the present application.

[0026] Figure 7 It is a structural schematic diagram of the present application.

[0027] Figure 8 It is a structural schematic diagram of the present application.

[0028] Figure 9 The cross-sectional structure diagram of the other side of the single expansion sleeve structure of the present application.

[0029] Figure 10 The cross-sectional structure diagram of the knife suitable for the second expansion state of the present application.

[0030] Figure 11 The cross-sectional structure diagram of the knife suitable for the second expansion state and the first positioning block extended of the present application.

[0031] Figure 12 The cross-sectional structure diagram of the knife suitable for the second expansion state and the second positioning block extended of the present application.

[0032] Explanation of figure mark: 1, expansion assembly; 2, deformed inner expansion assembly; 3, plug positioning structure; 101, fixed seat; 102, expansion sleeve rear end expansion piece; 103, expansion sleeve head end expansion structure; 1021, limiting sliding groove; 1022, rotary drive unit; 1031, mounting cylinder; 1032, expansion plate; 1033, connecting piece; 1034, drive connecting rod; 1035, drive rod; 1036, telescopic drive unit; 201, expansion sleeve structure; 202, connecting soft sleeve; 203, longitudinal drive part; 2011, inner expansion end; 2012, rotating end; 2013, guide rod; 2014, guide groove; 2015, reset spring; 301, sliding block; 302, curved arm; 303, reciprocating connecting rod; 304, sliding rod; 305, positioning part; 3051, first positioning block; 3052, second positioning block. DETAILED DESCRIPTION

[0033] Example 1, as Figures 1 to 12As shown, the present invention relates to an internally expanding tool clamping device, comprising a spreading assembly 1, a deformable internally expanding assembly 2, and an insert positioning structure 3; the deformable internally expanding assembly 2 is slidably arranged on the outside of the spreading assembly 1, and when the deformable internally expanding assembly 2 moves axially on the spreading assembly 1, the expanding sleeve end of the deformable internally expanding assembly 2 cooperates with the inclined surface of the spreading assembly 1 to expand and contract; the insert positioning structure 3 is arranged on the spreading assembly 1, and the insert positioning structure 3 has a contracted state and an extended state. When the insert positioning structure 3 is in the contracted state, the positioning component 305 of the insert positioning structure 3 retracts into the spreading assembly 1. When the insert positioning structure 3 is in the extended state, the spreading assembly 1 rotates to drive the slider 301 of the insert positioning structure 3 to rotate, and the positioning component 305 of the insert positioning structure 3 extends out of the spreading assembly 1 to form a tool clamping component.

[0034] This invention utilizes the design of an expansion component 1, a deformable inner expansion component 2, and a positioning block structure 3. The deformable inner expansion component 2 is slidably assembled on the outside of the expansion component 1. The two components achieve efficient expansion and contraction conversion through precise inclined surface cooperation. The axial driving force can be cleverly converted into radial expansion force at the expansion sleeve end, allowing the expansion sleeve end to tightly fit against the inner wall of the tool mounting hole to complete the initial radial fixation. At the same time, the high-precision characteristics of the inclined surface guide ensure uniform force distribution during expansion, avoiding damage to the tool or component caused by local stress concentration. The positioning block structure 3 is integrated into the expansion component 1 and achieves flexible switching between contraction and extension states through rotational linkage. During contraction, the positioning component 305 retracts into the component without interfering with the expansion action. After extension, it forms a snap-fit ​​component adapted to the tool, achieving limit locking through snap-fit, and realizing snap-fit ​​positioning of other types of tools. This invention integrates the expansion, contraction, and positioning locking functions into one unit, forming a dual fixing mechanism of radial tension and circumferential snap-fit. The fixing structure can be switched according to the specific type of tool, adapting to the fixing requirements of different specifications of tools and ensuring the reliability of tool fixing.

[0035] Specifically, such as Figures 1 to 8 As shown, the expansion component 1 of the present invention has an initial state and a deformed state. When the expansion component 1 is in the initial state, the front end of the expansion component 1 contracts into a conical structure. When the expansion component 1 is in the deformed state, the front end of the expansion component 1 opens into a trumpet structure. The deformable inner expansion component 2 has a first expansion state and a second expansion state. When the deformable inner expansion component 2 is in the first expansion state, it has a columnar structure. When the deformable inner expansion component 2 is in the second expansion state, it has a trumpet structure. When the expansion component 1 is in the initial state and moves along the axial direction, the expansion component 1 causes the deformable inner expansion component 2 to be in the first expansion state through the conical structure. When the expansion component 1 is in the deformed state, the expansion component 1 causes the deformable inner expansion component 2 to be in the second expansion state through the trumpet structure.

[0036] The present application is characterized in that the opening assembly 1 has two states of initial and deformation, the front end of the initial state is contracted to a conical cylinder structure, and the front end of the deformation state is opened to a horn structure; the deformation inner expansion assembly 2 has two corresponding opening states of first and second, the first opening state is a column structure, and the second opening state is a horn structure, and the two structures are precisely linked through structural adaptation. When the opening assembly 1 is in the initial conical cylinder structure and moves along the axial direction, the deformation inner expansion assembly 2 can be driven to switch to the first opening column state, and the adaptation and fixation of a tool are completed; when the opening assembly 1 switches to the deformed horn structure, the deformation inner expansion assembly 2 is driven to switch to the second opening horn state through structural adaptation, and the adaptation and fixation of another tool are realized. The present application realizes the inner expansion fixation of different tools through the structural adaptation of the opening assembly 1 and the deformation inner expansion assembly 2 in different states, and meets the industrial application needs of different specifications of tools in the field of machining and automatic equipment.

[0037] It is worth noting that, as shown in Figures 4 to 8 The opening assembly 1 of the present application comprises a fixed seat 101, a rear end opening piece 102 of the expansion sleeve, and a head end opening structure 103 of the expansion sleeve; the rear end opening piece 102 of the expansion sleeve is movably connected to the front end of the fixed seat 101, the head end opening structure 103 of the expansion sleeve is located at the front end of the rear end opening piece 102 of the expansion sleeve, the rear end opening piece 102 of the expansion sleeve and the head end opening structure 103 of the expansion sleeve form a conical cylinder structure, and the conical cylinder structure is used to drive the deformation inner expansion assembly 2 to deform to the first opening state.

[0038] The expansion sleeve head end expansion structure 103 comprises a mounting cylinder 1031, an expansion plate 1032, a connecting piece 1033, a driving connecting rod 1034, a driving rod 1035 and a telescopic driving unit 1036; the mounting cylinder 1031 is mounted at the front end of the expansion sleeve rear end expansion piece 102, and the mounting cylinder 1031 is a hollow cylindrical structure, six expansion plates 1032 are arranged equidistantly and annularly on the side wall of the mounting cylinder 1031, the middle parts of the six expansion plates 1032 are movably connected to the six connecting pieces 1033 respectively, and the six connecting pieces 1033 are all mounted on the inner wall of the mounting cylinder 1031, the six driving connecting rods 1034 are movably connected to one end of the six expansion plates 1032 respectively, the other ends of the six driving connecting rods 1034 are movably connected to the head end of the driving rod 1035 equidistantly and annularly, the driving rod 1035 is slidably connected to the expansion sleeve rear end expansion piece 102, and the telescopic driving unit 1036 is mounted on the expansion sleeve rear end expansion piece 102, and the output end of the telescopic driving unit 1036 is connected to the tail end of the driving rod 1035; when the expansion assembly 1 is in the initial state, the six expansion plates 1032 are retracted flush with the side wall of the mounting cylinder 1031, when the expansion assembly 1 is in the deformed state, the six driving connecting rods 1034 drive the six expansion plates 1032 to protrude to the outside of the mounting cylinder 1031, the mounting cylinder 1031 and the six expansion plates 1032 form a horn-shaped structure, and the horn-shaped structure is used for driving the deformed inner expansion assembly 2 to deform to the second expansion state.

[0039] The deformed inner expansion assembly 2 comprises an expansion sleeve structure 201, a connecting soft sleeve 202 and a longitudinal driving component 203; the six expansion sleeve structures 201 are arranged equidistantly and annularly on the outside of the mounting cylinder 1031, the six connecting soft sleeves 202 are connected between the six expansion sleeve structures 201, the six expansion sleeve structures 201 are arranged equidistantly and annularly at the head end of the longitudinal driving component 203, and the longitudinal driving component 203 is slidably connected to the fixed seat 101; when the deformed inner expansion assembly 2 is in the first expansion state, the six expansion sleeve structures 201 and the six connecting soft sleeves 202 form a columnar structure, and the columnar structure is used for fixing a tool with a cylindrical hole in an inner expansion mode.

[0040] The expansion sleeve structure 201 comprises an inner expansion end 2011 and a rotating end 2012; the six inner expansion ends 2011 are connected equidistantly and annularly at the head end of the longitudinal driving component 203, one end of the six rotating ends 2012 is rotatably connected to the six inner expansion ends 2011 respectively, and an inclined surface is formed at the connection between the inner expansion end 2011 and the rotating end 2012, and the six rotating ends 2012 are rotated towards the direction away from the mounting cylinder 1031; when the deformed inner expansion assembly 2 is in the second expansion state, the six rotating ends 2012 and the front ends of the six connecting soft sleeves 202 form a horn-shaped structure, and the horn-shaped structure is used for fixing a tool with a horn-shaped hole in an inner expansion mode.

[0041] The expansion sleeve structure 201 further comprises guide rods 2013, guide grooves 2014 and return springs 2015; the six guide rods 2013 are respectively installed on the six rotating ends 2012, the six guide grooves 2014 are respectively formed on the inclined surfaces of the six inner expansion ends 2011, and the six guide rods 2013 are respectively slidably connected in the six guide grooves 2014, the six guide rods 2013 and the six guide grooves 2014 are connected through the six return springs 2015, and the guide rod 2013 is a curved rod structure.

[0042] The present application realizes the self-adaptive expansion fixation of different hole-shaped tools through the design of the expansion assembly 1 and the deformed expansion assembly 2 and the precise cooperation of the expansion assembly 1 and the deformed expansion assembly 2. The expansion assembly 1 is based on the fixed seat 101, the expansion sleeve rear end expansion piece 102 and the initial state of the expansion sleeve head end expansion structure 103 form a conical cylinder structure, and the deformed expansion assembly 2 forms a deformable expansion system through the six equidistant annular expansion sleeve structures 201, the connecting soft sleeve 202 and the longitudinal driving component 203. The rotating end 2012, the guide rod 2013, the inclined surface guide groove 2014 and the return spring 2015 are arranged in the expansion sleeve structure 201, and a stable deformation-return mechanism is constructed. When the longitudinal driving component 203 drives the deformed expansion assembly 2 to move axially, the expansion assembly 1 is in the initial state, the conical cylinder-shaped expansion sleeve rear end expansion piece 102 and the expansion plate 1032 are pushed to synchronize the expansion of the expansion sleeve structure 201, the six expansion sleeve structures 201 and the connecting soft sleeve 202 form a column-shaped first expansion state, and the expansion fixation of the cylindrical hole tool is accurately adapted; when it is necessary to fix the horn-shaped hole tool, the telescopic driving unit 1036 drives the driving rod 1035 to drive the six driving connecting rods 1034 to link, so that the expansion plate 1032 rotates along the connecting piece 1033 and protrudes outward of the mounting cylinder 1031, the expansion sleeve head end expansion structure 103 is deformed into a horn-shaped state, the deformed expansion assembly 2 is attached to the horn-shaped structure, the rotating end 2012 rotates outward along the guide groove 2014 under the double action of the inclined surface and the expansion plate 1032, the return spring 2015 is stretched, and the six rotating ends 2012 and the front end of the connecting soft sleeve 202 form a horn-shaped second expansion state, so that the horn-shaped hole tool is fixed by the expansion fixation. The present application realizes the precise fixation of different hole-shaped tools through the conical cylinder, horn-shaped shape switching of the expansion assembly 1 and the column-shaped, horn-shaped hierarchical adaptation of the deformed expansion assembly 2 without complex regulation and control. The guide rod 2013 of the expansion sleeve structure 201 and the return spring 2015 cooperate to ensure that the deformation process is stable and controllable and the return is accurate.

[0043] Further, as shown in FIG. 6, the expansion sleeve structure 201 is provided with a telescopic expansion sleeve 204, and the telescopic expansion sleeve 204 is connected to the six equidistant annular expansion sleeve structures 201 through the connecting soft sleeve 202. Figures 7 to 9As shown, the plug positioning structure 3 of the present application comprises a sliding block 301, a curved arm 302, a reciprocating connecting rod 303, a sliding rod 304 and a positioning component 305; six sliding blocks 301 are respectively slidably connected to the inner side of the six inner expanding ends 2011, six curved arms 302 are respectively installed on the six sliding blocks 301, and the six curved arms 302 are respectively slidably connected to the inner side of the six inner expanding ends 2011, the two ends of the curved arm 302 are respectively movably connected to two reciprocating connecting rods 303, twelve reciprocating connecting rods 303 are respectively movably connected to twelve sliding rods 304, and twelve sliding rods 304 are respectively slidably connected to the six inner expanding ends 2011, twelve positioning components 305 are respectively installed at the ends of the twelve sliding rods 304, and the twelve positioning components 305 are respectively movably connected in the grooves formed on the surface of the six inner expanding ends 2011; when the plug positioning structure 3 is in the retracted state, the twelve positioning components 305 are retracted into the grooves, and when the plug positioning structure 3 is in the extended state, the twelve positioning components 305 are extended out of the grooves to form a protruding buckle structure, and the protruding buckle structure is used for buckling fixing the tool with a corresponding shaped groove.

[0044] The six sliding blocks 301 are respectively slidably connected in the six limiting sliding grooves 1021 formed equidistantly on the annular surface of the expanding sleeve rear end supporting opening member 102, and the output end of a rotary drive unit 1022 is connected to the expanding sleeve rear end supporting opening member 102, and the rotary drive unit 1022 is installed on the fixed seat 101.

[0045] The plug positioning structure 3 of the present application is designed to achieve double precise fixing of different hole shapes and grooved tools; the six sliding blocks 301 are used as the transmission starting point, the sliding blocks 301 are slidably connected in the limiting sliding grooves 1021 of the expanding sleeve rear end supporting opening member 102, the expanding sleeve rear end supporting opening member 102 is driven to rotate by the rotary drive unit 1022, the sliding blocks 301 are driven to rotate along the inner side of the inner expanding end 2011 through the limiting sliding grooves 1021, and the curved arms 302 are synchronously moved through linkage, the reciprocating connecting rods 303 connected to the two ends of the curved arm 302 are rotated, the sliding rods 304 are slid by the reciprocating connecting rods 303, and finally the twelve positioning components 305 are switched in and out of the grooves of the inner expanding end 2011; when the positioning components 305 are retracted into the grooves in the retracted state, they do not interfere with the inner expanding action, and when they are extended out of the grooves in the extended state, they form a protruding buckle structure, which precisely buckles the tool with a corresponding shaped groove, and also forms double locking of the inner expanding fixing and the buckle positioning.

[0046] The plug positioning structure 3 of the present application solves the defects of the traditional inner expanding structure that can only adapt to a single hole shape and has insufficient fixing stability, and adapts to the fixing scene of tools of various specifications with grooves and without grooves.

[0047] Further, as shown in FIG. 6, the plug positioning structure 3 of the present application comprises a sliding block 301, a curved arm 302, a reciprocating connecting rod 303, a sliding rod 304 and a positioning component 305; six sliding blocks 301 are respectively slidably connected to the inner side of the six inner expanding ends 2011, six curved arms 302 are respectively installed on the six sliding blocks 301, and the six curved arms 302 are respectively slidably connected to the inner side of the six inner expanding ends 2011, the two ends of the curved arm 302 are respectively movably connected to two reciprocating connecting rods 303, twelve reciprocating connecting rods 303 are respectively movably connected to twelve sliding rods 304, and twelve sliding rods 304 are respectively slidably connected to the six inner expanding ends 2011, twelve positioning components 305 are respectively installed at the ends of the twelve sliding rods 304, and the twelve positioning components 305 are respectively movably connected in the grooves formed on the surface of the six inner expanding ends 2011; when the plug positioning structure 3 is in the retracted state, the twelve positioning components 305 are retracted into the grooves, and when the plug positioning structure 3 is in the extended state, the twelve positioning components 305 are extended out of the grooves to form a protruding buckle structure, and the protruding buckle structure is used for buckling fixing the tool with a corresponding shaped groove. Figures 8 to 9As shown, the present application relates to the positioning component 305 comprising a first positioning block 3051 and a second positioning block 3052; the six first positioning blocks 3051 are all hexagonal column structures, and the six second positioning blocks 3052 are all circular table structures; one first positioning block 3051 and one second positioning block 3052 are respectively arranged on both sides of each inner expanding end 2011.

[0048] The present application designs the positioning component 305, which adopts a double-form design, the six first positioning blocks 3051 are hexagonal column structures, and the six second positioning blocks 3052 are circular table structures, and each inner expanding end 2011 is symmetrically arranged on both sides; when being contracted, the positioning blocks are all retracted into the inner expanding end 2011 without interfering with the inner expanding action; when being extended, the positioning blocks can be adaptively clamped according to the shape of the tool groove; the existing buckle fixing type tool often has a hexagonal groove or a circular table groove; the hexagonal groove has a large contact area, high circumferential positioning precision, and strong torque transmission capacity, and is suitable for tools that can withstand large torque; the circular table groove has high positioning precision, good self-centering effect, and better torque transmission capacity than a cylindrical pin; the hexagonal positioning block and the circular table positioning block correspond to two kinds of grooves respectively, and the bilateral symmetric arrangement further improves the uniformity of the buckle stress and strengthens the anti-rotation and anti-creep effect. The double-form positioning block greatly widens the tool adaptation range; the longitudinal driving component 203 cooperates with the rotary driving unit 1022 to realize the whole-process automation of "inner expanding mode switching-positioning block extension and clamping", without the need for additional independent driving, and simplifies the operation process. The present application deeply integrates the hierarchical inner expanding adaptation, accurate buckle positioning, and double-form positioning adaptation, solves the defects of single adaptation and fixed positioning form of the traditional inner expanding structure, improves the fixing reliability under high-speed cutting and vibration working conditions through the double fixing mechanism, can adapt to tools of various specifications such as cylindrical / horn-shaped holes, hexagonal / circular table grooves, and grooves, and is perfectly suitable for the industrial tool fixing needs in the fields of mechanical machining, automatic production line rapid tool changing, multi-specification tool positioning, etc.

[0049] The present application discloses a preferred embodiment, but is not limited thereto, and those skilled in the art can easily understand the spirit of the present application and make different inferences and changes according to the above-mentioned embodiment, as long as they do not deviate from the spirit of the present application, which is within the protection scope of the present application.

Claims

1. An internally expanding tool clamping device, characterized in that, It includes a spreading component (1), a deformable internal expansion component (2), and an insert positioning structure (3); The deformable inner expansion component (2) is slidably arranged on the outside of the expansion component (1). When the deformable inner expansion component (2) moves axially on the expansion component (1), the expansion sleeve end of the deformable inner expansion component (2) cooperates with the inclined surface of the expansion component (1) to expand and contract. The insertion block positioning structure (3) is arranged on the expansion assembly (1). The insertion block positioning structure (3) has a retracted state and an extended state. When the insertion block positioning structure (3) is in the retracted state, the positioning component (305) of the insertion block positioning structure (3) is retracted into the expansion assembly (1). When the insertion block positioning structure (3) is in the extended state, the expansion assembly (1) rotates to drive the slider (301) of the insertion block positioning structure (3) to rotate. The positioning component (305) of the insertion block positioning structure (3) extends out of the expansion assembly (1) to form a tool fastener.

2. The internal expansion tool clamping device according to claim 1, characterized in that, The spreading component (1) has an initial state and a deformed state. When the spreading component (1) is in the initial state, the front end of the spreading component (1) contracts into a conical structure. When the spreading component (1) is in the deformed state, the front end of the spreading component (1) opens into a trumpet-shaped structure. The deformable inner expansion component (2) has a first open state and a second open state. When the deformable inner expansion component (2) is in the first open state, it has a columnar structure. When the deformable inner expansion component (2) is in the second open state, it has a trumpet-shaped structure. When the opening component (1) is in the initial state and moves along the axial direction, the opening component (1) makes the deformable inner expansion component (2) in the first open state through the conical structure. When the opening component (1) is in the deformed state, the opening component (1) makes the deformable inner expansion component (2) in the second open state through the trumpet-shaped structure.

3. The internal expansion tool clamping device according to claim 2, characterized in that, The expansion assembly (1) includes a fixed base (101), a rear expansion member (102) of the expansion sleeve, and a head expansion structure (103) of the expansion sleeve. The rear end support member (102) of the expansion sleeve is movably connected to the front end of the fixed base (101). The head end support structure (103) of the expansion sleeve is located at the front end of the rear end support member (102). The rear end support member (102) and the head end support structure (103) of the expansion sleeve form a conical structure. The conical structure is used to drive the deformation inner expansion component (2) to deform to the first expansion state.

4. The internally expanding tool clamping device according to claim 3, characterized in that, The expansion sleeve end opening structure (103) includes an installation cylinder (1031), an opening plate (1032), a connector (1033), a drive link (1034), a drive rod (1035), and a telescopic drive unit (1036). The mounting cylinder (1031) is installed at the front end of the expansion sleeve rear end support member (102), and the mounting cylinder (1031) is a hollow cylindrical structure. A plurality of expansion plates (1032) are equidistantly arranged in a ring on the side wall of the mounting cylinder (1031). The middle portions of the expansion plates (1032) are movably connected to a plurality of connecting members (1033), and the connecting members (1033) are all installed on the inner wall of the mounting cylinder (1031). A plurality of driving connecting rods (103... 4) The other ends of the plurality of drive rods (1034) are movably connected to one end of the plurality of expansion plates (1032), and are movably connected to the head end of the drive rod (1035) at equal intervals in a ring. The drive rod (1035) is slidably connected to the rear end expansion member (102) of the expansion sleeve. The telescopic drive unit (1036) is installed on the rear end expansion member (102) of the expansion sleeve, and the output end of the telescopic drive unit (1036) is connected to the tail end of the drive rod (1035). When the expansion assembly (1) is in the initial state, several expansion plates (1032) are closed and flush with the side wall of the mounting cylinder (1031). When the expansion assembly (1) is in the deformed state, several driving connecting rods (1034) drive several expansion plates (1032) to protrude to the outside of the mounting cylinder (1031). The mounting cylinder (1031) and several expansion plates (1032) form a trumpet-shaped structure. The trumpet-shaped structure is used to drive the deformation expansion assembly (2) to deform to the second expansion state.

5. The internally expanding tool clamping device according to claim 4, characterized in that, The deformable inner expansion component (2) includes an expansion sleeve structure (201), a connecting soft sleeve (202), and a longitudinal drive component (203). A plurality of expansion sleeve structures (201) are arranged in an equidistant ring on the outside of the mounting cylinder (1031), a plurality of connecting soft sleeves (202) are connected between the plurality of expansion sleeve structures (201), a plurality of expansion sleeve structures (201) are arranged in an equidistant ring at the head end of the longitudinal drive component (203), and the longitudinal drive component (203) is slidably connected to the fixed seat (101). When the deformable inner expansion assembly (2) is in the first open state, the plurality of expansion sleeve structures (201) and the plurality of connecting soft sleeves (202) form a columnar structure, and the columnar structure is used for inner expansion to fix the tool with a cylindrical hole.

6. The internal expansion tool clamping device according to claim 5, characterized in that, The expansion sleeve structure (201) includes an inner expansion end (2011) and a rotating end (2012). A plurality of inner expansion ends (2011) are equidistantly and annularly connected to the head end of the longitudinal drive component (203). One end of a plurality of rotating ends (2012) is rotatably connected to a plurality of inner expansion ends (2011). An inclined surface is provided at the connection between the inner expansion ends (2011) and the rotating ends (2012). A plurality of rotating ends (2012) rotate in a direction away from the mounting cylinder (1031). When the deformable inner expansion assembly (2) is in the second open state, the front ends of a plurality of rotating ends (2012) and a plurality of connecting soft sleeves (202) are in a trumpet-shaped structure. The trumpet-shaped structure is used for inner expansion to fix the tool with a trumpet-shaped hole.

7. The internal expansion tool clamping device according to claim 6, characterized in that, The expansion sleeve structure (201) also includes a guide rod (2013), a guide groove (2014), and a return spring (2015). A plurality of guide rods (2013) are respectively installed on a plurality of rotating ends (2012), a plurality of guide grooves (2014) are respectively opened on the inclined surfaces of a plurality of inner expansion ends (2011), and a plurality of guide rods (2013) are respectively slidably connected in a plurality of guide grooves (2014). A plurality of guide rods (2013) and a plurality of guide grooves (2014) are connected by a plurality of return springs (2015). The guide rods (2013) are curved rod structures.

8. The internal expansion type tool clamping device according to claim 7, characterized in that, The insertion block positioning structure (3) includes a slider (301), a crank arm (302), a reciprocating connecting rod (303), a slide bar (304), and a positioning component (305). A plurality of sliders (301) are slidably connected to the inner sides of a plurality of inner expansion ends (2011). A plurality of crank arms (302) are respectively mounted on a plurality of sliders (301), and the plurality of crank arms (302) are slidably connected to the inner sides of a plurality of inner expansion ends (2011). The two ends of each crank arm (302) are movably connected to two reciprocating connecting rods (303). The plurality of reciprocating connecting rods (303) are movably connected to a plurality of sliding rods (304), and the plurality of sliding rods (304) are slidably connected to a plurality of inner expansion ends (2011). Above, several positioning components (305) are respectively installed at the ends of several slide rods (304), and several positioning components (305) are respectively movably connected in the grooves opened on the surface of several inner expansion ends (2011). When the insert block positioning structure (3) is in the retracted state, several positioning components (305) are retracted into the grooves. When the insert block positioning structure (3) is in the extended state, several positioning components (305) protrude from the grooves to form a protruding buckle structure, and the protruding buckle structure is used to buckle and fix the tool with the corresponding shaped groove.

9. The internal expansion type tool clamping device according to claim 8, characterized in that, The expansion sleeve rear end support member (102) is provided with several equidistant annular limiting grooves (1021), and several sliders (301) are respectively slidably connected in several limiting grooves (1021). The expansion sleeve rear end support member (102) is connected to the output end of a rotary drive unit (1022), and the rotary drive unit (1022) is mounted on a fixed base (101).

10. The internally expanding tool clamping device according to claim 8, characterized in that, The positioning component (305) includes a first positioning block (3051) and a second positioning block (3052); The first positioning blocks (3051) are all hexagonal columnar structures, and the second positioning blocks (3052) are all frustum-shaped structures. Each inner expansion end (2011) has a first positioning block (3051) and a second positioning block (3052) on its two sides respectively.

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