Quick-change tool connecting mechanism and quick-change drill chuck
By designing the quick change tool connection mechanism, the axial limiting structure and radial limiting structure are used to solve the problem of cumbersome connection between the drill chuck and the electric drill, and the rapid adaptation connection is achieved and the connection efficiency is improved.
Patent Information
- Application Number
- CN202420784339.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-04-16
AI Technical Summary
In the prior art, when connecting the drill chuck and the electric drill, it is necessary to manually move the back sleeve and drive the steel ball, resulting in cumbersome connection operation and low efficiency.
A quick change tool connection mechanism is designed, including a connecting body, a quick change connection part, a control sleeve and a limiting component. Through the coordination of the axial limiting structure and the radial limiting structure, a rapid adaptive connection between the connecting body and the connecting tool is achieved.
It realizes a quick adaptive connection between the connection body and the connection tool, without the operator manually pushing the outer end components, improving connection efficiency and convenience.
Smart Images
Figure CN222710901U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of quick-change connection tools, and more specifically, relates to a quick-change tool connection mechanism and a quick-change drill chuck. Background Art
[0002] When tools such as drill chucks need to be connected to external tools for driving, the connection operation is usually cumbersome and the replacement efficiency is low. In addition, when the drill chuck is connected to the electric drill, the back sleeve needs to be moved manually to drive the steel ball and other components to move outward so that the connecting shaft of the connecting tool can be connected to the drill chuck. Since the matching clearance between the connecting shaft and the drill body of the drill chuck is very small, the manual drive cannot reach the steel ball hole position well, resulting in inconvenience in connecting the quick-change chuck and the connecting shaft and low connection efficiency. Utility Model Content
[0003] The utility model aims at the technical problems existing in the prior art and provides a quick-change tool connection mechanism and a quick-change drill chuck.
[0004] In order to solve the above-mentioned technical problems, the utility model first provides a quick-change tool connection mechanism, including a connection body and a quick-change connection part that form a circumferential constraint with the connection tool. The quick-change connection part is connected to the connection body, and the quick-change connection part includes a control sleeve and a limiting component that limits the connection tool. A movable through hole of the limiting component is provided on the connection body, and the limiting component is arranged in the movable through hole of the limiting component. The control sleeve is fixed circumferentially relative to the connection body, and an axial limiting structure and a radial limiting structure are connected to the control sleeve. The radial limiting structure abuts against the limiting component, and the limiting component is driven by the radial limiting structure to connect or disconnect the connection body and the connection tool.
[0005] Preferably, the control sleeve is movably connected to the connecting body, a constraint space is provided on the control sleeve, and the radial limiting structure can move within the constraint space; the radial limiting structure includes a limit driving part and a first elastic limit member for limiting the radial movement of the limit driving part, one end of the limit driving part is connected to the limit component, and the second end of the limit driving part cooperates with the first elastic limit member.
[0006] Preferably, the axial limiting structure includes a limiting sleeve and a second elastic limiting member, the second elastic limiting member provides driving force for the control sleeve to abut the limiting component, the limiting sleeve is arranged at the lower end of the control sleeve, and when the connecting tool is not inserted into the connecting body, the limiting sleeve is used to support the limiting driving part.
[0007] Preferably, the inner circumference of the control sleeve is provided with a limit sleeve accommodating portion, a limit surface and an inner circular inclined surface located therebetween, the inner diameter of the limit sleeve accommodating portion is larger than the outer diameter of the limit sleeve, and the limit surface is adaptively connected to the limit component.
[0008] Preferably, the limit sleeve is interference fit with the connecting body, the thickness of the limit sleeve can be adapted to the radial movement distance of the limit component, the outer surface of the limit sleeve in contact with the limit driving part, and the limit surface of the control sleeve adapted to the limit component, the difference in radius between the two and the axial center of the connecting body is equal to the radial movement distance of the limit component.
[0009] The outer surface of the limiting sleeve is in contact with the limiting driving part, and the radius difference between the outer surface of the limiting sleeve and the limiting surface and the axial center of the connecting body is equal to the radial movement distance of the limiting component.
[0010] Preferably, an axial limiting portion is provided on the connecting body, and the upper end of the second elastic limiting member is cooperatively connected with the axial limiting portion, and the axial limiting portion is a supporting step on the connecting body or a supporting structure arranged on the supporting step.
[0011] Preferably, it further comprises a connection rear sleeve, which is arranged on the outer periphery of the connection body, and the control sleeve is arranged between the connection rear sleeve and the connection body.
[0012] Preferably, the connection rear sleeve and the control sleeve are split structures, and a third elastic limiter is arranged in the connection rear sleeve, and the third elastic limiter provides axial support force for the connection rear sleeve.
[0013] Preferably, a control sleeve mating surface is provided on the outer circumferential side of the connecting body, and a control sleeve limiting surface which is adapted to be connected with the connecting body is provided on the inner circumferential side of the control sleeve. Both the control sleeve mating surface and the control sleeve limiting surface contain planes, and the two cooperate to realize the circumferential limitation of the control sleeve relative to the connecting body.
[0014] Preferably, the limiting component is a locking ball structure movably connected in a movable through hole of the limiting component.
[0015] Preferably, a connecting groove structure adapted to be connected to the first elastic limiting member is provided on the outer peripheral side of the control sleeve.
[0016] The utility model also provides a quick-change drill chuck, comprising an outer sleeve, a nut, a nut sleeve, a clamping claw, and an end cover, wherein the end cover is connected with a retaining spring, and also comprises a quick-change tool connecting mechanism, which is arranged on the inner circumference of the outer sleeve.
[0017] Preferably, the connecting body comprises a drill body, and a matching surface adapted to the control sleeve is arranged on the outer periphery of the drill body.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The utility model has a simple structure and high connection efficiency. When the connecting tool is connected to the connecting body, the related parts are directly driven to connect through the cooperation of the parts. The control sleeve and the limiting component of the quick-change connecting part cooperate, and the axial limiting structure axially limits the control sleeve. Under the action of the control sleeve and the radial limiting structure, the connection and locking of the connecting body and the connecting tool are realized through the limiting component, thereby realizing a quick adaptation connection between the connecting body and the connecting tool. There is no need for the operator to manually push the outer end component, and the quick-change tool connection is more efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0021] Figure 1 This is a structural schematic diagram of the quick-change tool connection mechanism of the utility model;
[0022] Figure 2 The structure diagram of the quick-change tool connection mechanism of the utility model is shown in FIG. Figure 2 ;
[0023] Figure 3 It is a schematic diagram of the exploded structure of the quick-change drill chuck of the utility model;
[0024] Figure 4 This is a schematic diagram of the structure of the cotter pin of the utility model;
[0025] Figure 5 This is a schematic diagram of the structure of the control sleeve of the utility model;
[0026] Figure 6 This is an axial cross-sectional view of the control sleeve of the utility model;
[0027] Figure 7 It is a structural schematic diagram of the drill body of the utility model;
[0028] Figure 8 This is a schematic diagram of the structure of the first limit spring of the utility model;
[0029] Fig. 9 It is a structural schematic diagram of the limit sleeve of the utility model;
[0030] Fig.10 This is a schematic diagram of the structure of the connecting shaft of the utility model;
[0031] Fig.11 This is a schematic diagram of the structure of the utility model in which the rear sleeve and the control sleeve are connected to form an integrated structure;
[0032] Fig.12 This is a schematic diagram of the initial state structure of the drill chuck of the utility model;
[0033] Fig.13 The utility model shows the connection state between the drill chuck and the connecting shaft. Figure 1 ;
[0034] Fig.14 The utility model shows the connection state between the drill chuck and the connecting shaft. Figure 2 ;
[0035] Fig.15 The utility model shows the connection state between the drill chuck and the connecting shaft. Figure 3 .
[0036] Explanation of symbols in the figure:
[0037] 101, connecting body; 102, control sleeve; 1021, spring connecting groove; 1022, split pin groove; 1023, spring matching end face; 1024, inner circle inclined surface; 1025, limiting surface; 103, limiting component; 104, axial limiting structure; 105, radial limiting structure; 106, limiting drive unit; 107, first elastic limiting member; 108, limiting sleeve; 1081, upper end face; 1082, outer circle matching surface; 109, second elastic limiting member; 1, first limiting spring; 2, second limiting spring; 3, support Support pad; 4, drill body; 41, control sleeve matching surface; 42, steel ball hole; 5, nut; 6, clamping claw; 7, outer sleeve; 8, nut sleeve; 9, bushing; 10, hexagonal shaft; 11, front cover; 12, front retaining spring; 13, steel washer; 14, bearing; 15, spring piece; 16, steel ball; 17, cotter pin; 171, front end face; 172, groove-type connection structure; 173, lower end face; 18, connecting shaft; 181, hexagonal hole; 182, outer cylindrical surface; 183, steel ball groove; 19, connecting rear sleeve; 20, rear retaining spring; 21, third limit spring. DETAILED DESCRIPTION
[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the following is a further detailed description of a quick-change tool connection mechanism and a quick-change drill chuck provided by the present application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0039] See also Figure 1The utility model provides a quick-change tool connection mechanism, including a connection body 101 that forms a circumferential constraint with the connection tool, and a quick-change connection part, the quick-change connection part is connected to the connection body 101, the quick-change connection part includes a control sleeve 102 and a limiting component 103 that limits the connection tool, the connection body 101 is provided with a movable through hole of the limiting component, the limiting component 103 is arranged in the movable through hole of the limiting component, the control sleeve 102 is circumferentially fixed relative to the connection body 101, the control sleeve 102 is connected with an axial limiting structure 104 and a radial limiting structure 105, the radial limiting structure 105 is in contact with the limiting component 103, and the limiting component 103 is driven by the radial limiting structure 105 to connect or disconnect the connection body 101 with the connection tool.
[0040] The utility model has a simple structure and high connection efficiency. When the connecting tool is connected to the connecting body 101, the related parts are directly driven to connect through the cooperation of the parts. The control sleeve 102 and the limiting component 103 of the quick-change connection part cooperate, and the axial limiting structure 104 axially limits the control sleeve 102. Under the action of the control sleeve 102 and the radial limiting structure 105, the connection between the connecting body 101 and the connecting tool is realized and locked through the limiting component 103, thereby realizing a quick adaptation connection between the connecting body 101 and the connecting tool. There is no need for the operator to manually push the outer end component, and the quick-change tool connection is more efficient and convenient.
[0041] like Figure 1 As shown, the inner and outer peripheries of the connecting body 101 have movable space, and the quick-change connecting part is arranged in the external space of the connecting body 101. When the connecting tool is inserted into the internal space of the connecting body 101, the various components of the quick-change connecting part cooperate to achieve a quick connection between the connecting tool and the connecting body 101.
[0042] In this embodiment, Figure 1 , Figure 2As shown, the control sleeve 102 is movably connected to the connection body 101, and the control sleeve 102 is restricted from rotating circumferentially along the center line of the connection body 101. A radial limiting structure constraint space 1022 is provided on the control sleeve 102, and the radial limiting structure can move within the constraint space; the radial limiting structure 105 includes a limiting driving part 106 and a first elastic limiting member 107 that limits the radial movement of the limiting driving part 106, one end of the limiting driving part 106 is connected to the limiting component 103, and the second end of the limiting driving part 106 cooperates with the first elastic limiting member 107. The axial limiting structure 104 includes a limiting sleeve 108 and a second elastic limiting member 109. The second elastic limiting member 109 provides driving force for the control sleeve 102 to abut against the limiting member 103. The second elastic limiting member 109 is connected with the upper end surface of the control sleeve 102. The limiting sleeve 108 is arranged at the lower end of the control sleeve 102, and when the connecting tool is not inserted into the connecting body 101, the limiting sleeve 108 is used to support the limiting driving part 106.
[0043] When the connecting tool is connected to the connecting body 101, the limiting component 103 moves outward along the movable through hole of the limiting component on the connecting body 101, and the control sleeve 102 moves axially under the action of the second elastic limiting member 109 of the axial limiting structure 104, and the inner end of the limiting component 103 abuts against the side of the connecting tool; when the connecting tool is detached from the connecting body 101, the control sleeve 102 is moved forward, the inner end of the limiting component 103 is detached from the connecting tool, and the outer end of the limiting component 103 is connected to the limiting drive part 106.
[0044] In this embodiment, the limiting component 103 is movably connected in the limiting component movable through hole of the connecting body 101, and can move radially under the drive of external force; the control sleeve 102 is sleeved on the outer periphery of the connecting body 101, and a limiting structure mounting part is provided on the control sleeve 102, and the limiting driving part 106 is movably connected in the limiting structure mounting part of the control sleeve 102, and can move radially therein, the limiting component movable through hole can be arranged relative to the limiting structure mounting part, and the outer periphery of the limiting component movable through hole is matched with the inner periphery of the limiting structure mounting part, so that the limiting component 103 and the limiting driving part 106 have radial movement space, and the inner limiting component 103 drives the limiting driving part 106 to move radially, thereby cooperating to complete the quick connection between the connecting body 101 and the connecting tool.
[0045] Specifically, Figure 2 , Figure 3As shown, the limit driving part 106 is a connecting pin structure arranged in the limiting structure mounting part, the inner end of the connecting pin structure is arranged opposite to the limiting component 103, and the outer end of the connecting pin structure is connected to the first elastic limiting component 107. The first elastic limiting component 107 radially limits the connecting pin structure, and when the connecting tool is not inserted into the connecting body 101, the end face of the connecting pin structure contacts the limiting component 103, and the limiting component 103 is limited in the movable through hole of the limiting component of the connecting body 101 under the action of the connecting pin structure and the first elastic limiting component 107.
[0046] Furthermore, in this embodiment, the limiting component 103 is a steel ball 16 arranged in the movable through hole of the limiting component, the limiting driving part 106 is a cotter pin 17 arranged in the control sleeve 102, and the first elastic limiting component 107 is a first limiting spring 1 arranged at the end of the cotter pin 1.
[0047] like Figure 4 As shown, the cotter pin 17 is a cylindrical or conical structure as a whole, a front end face 171 is provided at one end of the cotter pin 17, a groove-type connecting structure 172 is provided at the other end of the cotter pin 1, a lower end face 173 is provided on the circumference of the cotter pin 17, the cotter pin 17 contacts with the steel ball 16 through the front end face 171, and the cotter pin 17 contacts with the first limit spring 1 through the groove-type connecting structure 172 provided at the end.
[0048] Furthermore, as a preferred embodiment of the utility model, the size of the limiting component 103 is compatible with the size of the movable through hole of the limiting component, and the limiting component 103 can be a locking spherical structure similar to a steel ball structure; the front end face 171 of the cotter pin 17 can be a cylindrical or conical structure, and the groove-type connection structure 172 of the cotter pin 17 is not limited to a square or semicircular structure.
[0049] In this embodiment, Figure 2 As shown, the second elastic limiting member 109 is a second limiting spring 2 arranged at the upper end of the control sleeve 102, and the second limiting spring 2 can move axially in the space formed by the connecting body 101 and the upper end surface of the control sleeve 102; an axial limiting portion is provided on the connecting body 101, and the axial limiting portion is a supporting step on the connecting body 101 or a supporting structure arranged on the supporting step. The upper end of the second limiting spring 2 is cooperatively connected with the axial limiting portion, and the upper end of the second limiting spring 2 is supported by the axial limiting portion, and the lower end of the second limiting spring 2 is cooperatively connected with the upper end limiting surface of the control sleeve 102, and the control sleeve 102 is axially limited by the second limiting spring 2.
[0050] In this embodiment, the axial limiting portion includes a support pad 3, and the second limiting spring 2 is limited by the support pad 3. The support pad 3 can be directly processed on the connecting body 101 or independently provided.
[0051] Specifically, Figure 2 As shown, the support pad 3 is arranged on the outer periphery of the connecting body 101 , the support pad 3 is a circular ring structure, and an annular limiting surface for supporting the second limiting spring 2 is arranged on the support pad 3 .
[0052] like Figure 5 As shown, in this embodiment, the control sleeve 102 is a multi-step annular sleeve structure, and a spring connecting groove 1021 is provided on the outer peripheral side of the control sleeve 102. The spring connecting groove 1021 is a concave annular connecting groove structure arranged along the circumference of the control sleeve 102. The first limit spring 1 is arranged in the spring connecting groove 1021. The outer peripheral side of the control sleeve 102 is also provided with a plurality of cotter pin grooves 1022. The cross-section of the cotter pin groove 1022 is a circular structure. The cotter pin 17 is transversely arranged in the cotter pin groove 1022. The front and rear ends of the cotter pin 17 are respectively used to connect with the steel ball 16 and the first limit spring 1.
[0053] Specifically, Figure 6 As shown, an inner circular bevel 1024 is provided on the inner circumferential side of the control sleeve 102. The inner circular bevel 1024 is arranged along the inner circumference of the control sleeve 102, and in the axial direction, the inner circular bevel 1024 is arranged at the upper end of the open groove 1022. When the connecting tool is connected to the connecting body 101, the driving steel ball 16 moves radially, and the steel ball 16 can contact and abut the inner circular bevel 1024 of the control sleeve 102.
[0054] like Figure 5 , Figure 7 As shown, a convex annular support structure is provided at the upper end of the control sleeve 102, and a limiting surface 1025 matching the connecting body 101 is provided on the inner circumference of the annular support structure. The control sleeve 102 is connected to the inner connecting body 101 via the limiting surface 1025, and the difference between the outer circle radius of the limiting sleeve 108 and the radius of the limiting surface 1025 of the control sleeve is adapted to the radial movement distance of the limiting component.
[0055] In this embodiment, the inner circumference of the control sleeve is provided with a limit sleeve accommodating part, a limit surface and an inner circular inclined surface located therebetween. The inner diameter of the limit sleeve accommodating part is larger than the outer diameter of the limit sleeve 108, and the limit surface is adaptively connected with the limit component. The control sleeve limit surface contains a plane structure, which is a rotation-limiting plane. The outer circumference of the connecting body 101 is also provided with a control sleeve mating surface 41. The control sleeve 102 is connected with the plane on the control sleeve mating surface 41 of the connecting body 101 to prevent the control sleeve 102 from rotating at will. Preferably, the inner circumference of the control sleeve 102 is provided with a limit sleeve accommodating part, the inner diameter of the limit sleeve accommodating part is larger than the outer diameter of the limit sleeve 108, and the limit sleeve accommodating part contains a plane. The circumferential fixation of the control sleeve 102 relative to the connecting body 101 can be achieved by the planes provided on the limit sleeve accommodating part of the control sleeve 102 and the limit sleeve 108.
[0056] Furthermore, a gap is provided between the inner center hole of the control sleeve 102 and the connecting body 101 , so that the control sleeve 102 can move axially on the connecting body 101 .
[0057] In addition, the upper end face of the control sleeve 102 is provided with a circular spring fitting end face 1023, and the spring fitting end face 1023 is arranged on the outer peripheral side of the annular support structure and the inner diameter of the spring fitting end face 1023 is the same as the outer diameter of the annular support structure. The annular support structure is connected to the spring fitting end face 1023, and the control sleeve 102 is connected to the second limit spring 2 through the spring fitting end face 1023. The second limit spring 2 is arranged between the spring fitting end face 1023 of the control sleeve 102 and the support pad 3, and the axial limitation of the second limit spring 2 is performed through the spring fitting end face 1023 and the support pad 3.
[0058] Furthermore, in this embodiment, the thickness of the limiting sleeve 108 can be adapted to the radial movement distance of the steel ball 16 .
[0059] In this embodiment, Figure 2 , Figure 8 As shown, the inner diameter of the first limit spring 1 needs to be slightly smaller than the diameter of the spring connecting groove 1021 on the control sleeve 102. The first limit spring 1 is a circular limit spring structure that is cross-arranged head to tail, and the starting position and the ending position of the first limit spring 1 are partially overlapped, thereby ensuring that when used in conjunction with the control sleeve 102, the two end surfaces of the first limit spring 1 can always maintain partial overlap or just contact each other.
[0060] Furthermore, in this embodiment, the steel ball 16 and the cotter pin 17 are arranged opposite to each other, so that the number of the cotter pins 17 can be set according to the number of the steel balls 16, and the cotter pin grooves 1022 arranged on the control sleeve 102 are not limited to a fixed number.
[0061] Furthermore, as a preferred embodiment of the present invention, the specific cross-sectional shape of the spring connection groove 1021 provided on the periphery of the control sleeve 102 is not limited to a square, circular or trapezoidal structure, and it is used to support and limit the first limit spring 1, so its specific structure can be adaptively adjusted according to the structure, quantity and actual use requirements of the first limit spring 1. In addition, the inner diameter of the control sleeve 102 is not limited to a fixed shape, and its inner side is adaptively connected to the connection body 101, and can be adaptively adjusted according to the shape of the outer peripheral surface of the connection body 101.
[0062] Furthermore, in this embodiment, if Fig. 9As shown, the limiting sleeve 108 is a circular ring structure, and the limiting sleeve 108 is arranged on the outer periphery of the end of the connecting body 101, and the limiting sleeve 108 and the connecting body 101 are interference fit, so that a tight fit connection can be achieved. The upper end face 1081 of the limiting sleeve 108 can be matched and connected with the lower end face 173 of the cotter pin 17. When the connecting tool is not inserted into the connecting body 101, the second limiting spring 2 is in a compressed state. At this time, the upper end face 1081 of the limiting sleeve 108 contacts the lower end face 173 of the cotter pin 17, providing axial support force to the cotter pin 17 and limiting the axial movement of the control sleeve 102.
[0063] Furthermore, the utility model also provides a quick-change drill chuck, which includes the quick-change tool connection mechanism mentioned above. The quick-change tool connection mechanism and the quick-change drill chuck provided by the utility model are described in detail below by taking the quick-change drill chuck as an example.
[0064] Specifically, Figure 2 , Figure 3 As shown, the quick-change drill chuck includes a drill body 4, a nut 5, a clamping jaw 6, an end cover and a sleeve 7. The nut 5 is connected to a nut sleeve 8, a bushing 9 is provided on the inner circumference of the sleeve 7, a retaining spring is provided between the end cover and the drill body 4, a hexagonal shaft 10 is connected inside the drill body 4, and the drill body 4 is connected to a connecting tool via the hexagonal shaft 10.
[0065] In this embodiment, the end cover includes a front cover 11 . A front retaining spring 12 with a circular structure is provided between the front cover 11 and the drill body 4 . The front retaining spring 12 is used to limit the axial side of the front cover 11 .
[0066] Furthermore, the quick-change drill chuck also includes a steel pad 13, a bearing 14, and a spring 15. The structures and connection relationships of each component are conventional in the art, and the structures of each part of the drill chuck are not described in detail here.
[0067] In this embodiment, Fig.10 As shown, the connecting tool is provided with a connecting shaft 18, the end of the connecting shaft 18 is adaptably connected to the inner side of the drill body 4, the end of the connecting shaft 18 is provided with a hexagonal hole 181, the connecting shaft 18 is adaptably connected to the hexagonal shaft 10 in the drill body 4 through the hexagonal hole 181, the end of the connecting shaft 18 is provided with an outer cylindrical surface 182 on the outer periphery, the lower side of the outer cylindrical surface 182 is provided with a steel ball groove 183, the steel ball groove 183 is an arc groove structure or a spherical groove structure provided along the outer periphery of the connecting shaft 18, and the connecting shaft 18 is adaptably connected to the steel ball 16 on the drill chuck through the steel ball groove 183.
[0068] In this embodiment, the quick-change tool connection mechanism is arranged on the inner circumference of the outer sleeve 7, and the connection body 101 is the drill body 4 of the quick-change drill chuck. The drill body 4 is quickly connected to the connection tool under the action of the quick-change connection part. A control sleeve 102 is provided on the outer circumference of the end of the drill body 4 away from the front cover 11. The control sleeve 102 can move axially on the drill body 4. The limiting component 103 is a steel ball 16 arranged between the drill body 4 and the control sleeve 102. The radial displacement of the steel ball 16 is limited by the cotter pin 17 and the first limiting spring 1.
[0069] Specifically, Figure 7 As shown, the outer peripheral surface of the drill body 4 is provided with a control sleeve mating surface 41 that is adapted to be connected to the control sleeve 102. The control sleeve mating surface 41 of the drill body 4 is also provided with a steel ball hole 42. The steel ball hole 42 is arranged to penetrate the drill body 4 along the radial direction. The steel ball 16 is arranged in the steel ball hole 42, and the steel ball hole 42 is a movable through hole for the steel ball 16.
[0070] Furthermore, if Figure 2 As shown, the utility model further includes a connecting sleeve 19, which is arranged on the outer periphery of the drill body 4, and the control sleeve 102 is arranged between the connecting sleeve 19 and the drill body 4. The connecting sleeve 19 is a circular sleeve structure, and the inner diameter of the connecting sleeve 19 is adapted to the maximum outer diameter of the outer sleeve 7 of the drill chuck.
[0071] In this embodiment, the limiting sleeve 108 disposed on the outer periphery of the drill body 4 is an arc-shaped structure. Fig. 9 As shown, the limit sleeve 108 is provided with an outer circular mating surface 1082, and the end of the limit sleeve 108 away from the control sleeve 102 is connected to the rear retaining spring 20, the rear retaining spring 20 is a circular ring structure, and the rear retaining spring 20 is arranged on the outer peripheral side of the drill body 4 and is in contact with the connecting rear sleeve 19. The limit sleeve 108 is interference fit with the drill body 4, and its movement is limited by the rear retaining spring 20.
[0072] Furthermore, the outer diameter of the limit sleeve 108 is smaller than the inner diameter of the inner lower part of the control sleeve 102, and the difference between the outer radius of the limit sleeve 108 and the inner radius of the upper part of the control sleeve 102 is equal to the radial offset value of the steel ball 16 when the connecting shaft 18 is connected for operation, thereby achieving stable radial limit movement.
[0073] In this embodiment, the connection rear sleeve 19 and the control sleeve 102 can be an integrated structure or a split structure. When the connection rear sleeve 19 and the control sleeve 102 are a split structure, such as Figure 2 As shown, the connecting rear sleeve 19 and the control sleeve 102 are arranged separately. At this time, a third elastic limiter is arranged in the connecting rear sleeve 19, and the third elastic limiter provides axial support force for the connecting rear sleeve 19. The third elastic limiter is arranged along the axial direction of the connecting rear sleeve 19, and the third elastic limiter is arranged on the periphery of the drill body 4.
[0074] Specifically, the third elastic limit member is a third limit spring 21 arranged in the connecting rear sleeve. The third limit spring 21 acts between the support pad 3 and the connecting rear sleeve 19. Under the action of external force, the third limit spring 21 can be axially extended and retracted, thereby providing elastic support for the connecting rear sleeve 19; and through the coordinated action of the steel ball 16, cotter pin 17, limit sleeve 108, each limit spring and support pad 3 arranged between the connecting rear sleeve 19 and the drill body 4, the quick connection of the quick-change chuck and the connecting tool is realized.
[0075] Furthermore, in this embodiment, the first limit spring 1, the second limit spring 2 and the third limit spring 21 are all arranged in the space formed by the outer peripheral side of the drill body 4 and the inner peripheral side of the connection rear sleeve 19 and are all arranged at the lower end of the support pad 3, and the upper ends of the second limit spring 2 and the third limit spring 21 are axially limited by the support pad 3. The second limit spring 2 and the third limit spring 21 are coaxially arranged, and the second limit spring 2 acts between the support pad 3 and the spring matching end face 1023 of the control sleeve 102, and the third limit spring 21 acts between the support pad 3 and the connection rear sleeve 19.
[0076] Furthermore, as a preferred embodiment of the present invention, when the rear sleeve 19 and the control sleeve 102 are connected as an integrated structure, Fig.11 As shown, the connection rear sleeve 19 moves synchronously with the control sleeve 102, and the connection rear sleeve 19 and the control sleeve 102 are integrated to form a control sleeve structure. At this time, the various components cooperate with each other to achieve rapid connection of the connection tool.
[0077] Furthermore, as a preferred embodiment of the present invention, the arrangement form of each limit spring and the specific number of coils of the spring provided in the present invention can be adjusted according to the actual gap and usage requirements.
[0078] The working principle of the utility model quick-change connection is:
[0079] In the initial state, when the connection tool is not connected to the drill body 4 of the drill chuck, Fig.12 As shown, the inner circumference of the control sleeve 102 cooperates with the outer circumference of the drill body 4, and the control sleeve 102 is limited to rotate along the center line of the drill body 4 through the limit surface 1025. At this time, the steel ball 16 is limited in the steel ball hole 42 of the drill body 4 under the action of the first limit spring 1 and the cotter pin 17, and the lower end surface 173 of the cotter pin 17 interacts with the end surface of the limit sleeve 108 to limit the control sleeve 102 from moving downward. At this time, the second limit spring 2 is in a compressed state.
[0080] When the connecting shaft 18 and the drill body 4 begin to connect with each other, as shown in FIG. Fig.13As shown, the outer cylindrical surface 182 of the connecting shaft 18 pushes the steel ball 16 to move radially outward along the steel ball hole 42 of the drill body 4, and the steel ball 16 pushes the front end surface 171 of the cotter pin 17 to move outward. When the cotter pin 17 moves a certain distance, the end is restricted by the first limit spring 1 from further moving radially outward; when the cotter pin 17 moves outward, the front end surface of the cotter pin 17 passes over the outer cylindrical mating surface 1082 of the limit sleeve 108, and the second limit spring 2 releases the pressure to act on the end face of the control sleeve 102, and the cotter pin 17 moves downward along the axial direction of the limit sleeve 108. At this time, the inner cylindrical inclined surface 1024 of the control sleeve 102 contacts the steel ball 16.
[0081] Continue to push the connecting shaft 18 to cooperate with the drill body 4, such as Fig.14 As shown, the steel ball 16 falls into the steel ball groove 183 of the connecting shaft 18, and the control sleeve 102 moves downward along the axial direction of the limit sleeve 108 under the action of the second limit spring 2. At this time, the limit surface 1025 on the control sleeve 102 cooperates with the steel ball 16 and the steel ball hole 42 on the drill body 4, thereby realizing the quick connection between the connecting shaft 18 and the drill chuck.
[0082] When the connecting shaft 18 is separated from the drill body 4, the connecting rear sleeve 19 is pushed to squeeze the third limit spring 21 and the second limit spring 2 to act on the control sleeve 102. Fig.15 As shown, the control sleeve 102 moves forward axially along the drill body 4, and the limiting surface 1025 on the control sleeve 102 no longer interacts with the steel ball 16, and the cotter pin 17 abuts against the steel ball 16 again. At this time, when the connecting shaft 18 is moving away from the drill body 4, the outer cylindrical surface 182 on the connecting shaft 18 pushes the steel ball 16 to disengage from the steel ball groove 183 on the connecting shaft 18 and move radially outward, thereby pushing the cotter pin 17 to move radially outward, so that the connecting shaft 18 can be moved out from the inside of the drill body 4 to achieve the disengagement of the connecting tool. When the connecting shaft 18 is taken out, the cotter pin 17 moves radially inwardly and abuts against the steel ball 16 under the action of the first limit spring 1, and the connected rear sleeve 19 is loosened. The connected rear sleeve 19 returns to the starting position under the action of the third limit spring 21, and the control sleeve 102 moves under the action of the second limit spring 2. At this time, the lower end face 173 of the cotter pin 17 abuts against the end face of the limit sleeve 108, and the control sleeve 102 returns to the starting position. The connected rear sleeve 19 is restricted by the rear retaining spring 20 to limit its outward movement in the axial direction.
[0083] The utility model has a simple structure and high connection efficiency. When the connecting tool is connected to the connecting body 101, the related parts are directly driven to connect through the cooperation of the parts. The control sleeve 102 and the steel ball 16 of the quick-change connection part cooperate, and the axial limiting structure 104 axially limits the control sleeve 102. Under the action of the control sleeve 102 and the radial limiting structure 105, the connection and locking of the connecting body 101 and the connecting tool are realized through the limiting component 103. In addition, with the coordinated cooperation of the control sleeve 102, the limiting spring, the limiting sleeve 108, the steel ball 16, the cotter pin 17, the connecting rear sleeve 19 and the rear retaining spring 20, the quick adaptation connection between the connecting body 101 and the connecting tool is realized, and the operator does not need to manually push the connecting rear sleeve 19 for connection, thereby improving work efficiency and realizing more efficient and convenient connection of the quick-change tool.
[0084] In the description of the present invention, it should be understood that terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0085] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0086] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A quick-change tool connection mechanism, comprising a connection body that forms a circumferential constraint with a connection tool, and a quick-change connection part, wherein the quick-change connection part is connected to the connection body, characterized in that: The quick-change connection part includes a control sleeve and a limiting component for limiting the connection tool. A movable through hole of the limiting component is provided on the connection body. The limiting component is arranged in the movable through hole of the limiting component. The control sleeve is fixed circumferentially relative to the connection body. An axial limiting structure and a radial limiting structure are connected to the control sleeve. The radial limiting structure abuts against the limiting component. The limiting component is driven by the radial limiting structure to connect or disconnect the connection body from the connection tool.
2. A quick-change tool connection mechanism according to claim 1, characterized in that: The control sleeve is movably connected to the connecting body, and a constraint space is provided on the control sleeve. The radial limiting structure can move within the constraint space; the radial limiting structure includes a limit driving part and a first elastic limit member for limiting the radial movement of the limit driving part, one end of the limit driving part is connected to the limit member, and the second end of the limit driving part cooperates with the first elastic limit member.
3. A quick-change tool connection mechanism according to claim 2, characterized in that: The axial limiting structure includes a limiting sleeve and a second elastic limiting member, the second elastic limiting member provides a driving force for the control sleeve to abut against the limiting component, the limiting sleeve is arranged at the lower end of the control sleeve, and when the connecting tool is not inserted into the connecting body, the limiting sleeve is used to support the limiting driving part; the inner circumference of the control sleeve is provided with a limiting sleeve accommodating part, a limiting surface and an inner circular inclined surface located therebetween, the inner diameter of the limiting sleeve accommodating part is larger than the outer diameter of the limiting sleeve, and the limiting surface is adaptively connected to the limiting component.
4. A quick-change tool connection mechanism according to claim 3, characterized in that: The limiting sleeve is interference fit with the connecting body, the thickness of the limiting sleeve can be adapted to the radial movement distance of the limiting component, the outer surface of the limiting sleeve in contact with the limiting driving part, and the limiting surface of the control sleeve adapted to the limiting component, the difference in radius between the two and the axial center of the connecting body is equal to the radial movement distance of the limiting component.
5. The quick-change tool connection mechanism according to claim 3, characterized in that: An axial limiting portion is provided on the connecting body, and the upper end of the second elastic limiting member is cooperatively connected with the axial limiting portion. The axial limiting portion is a supporting step on the connecting body or a supporting structure arranged on the supporting step.
6. The quick-change tool connection mechanism according to claim 1, characterized in that: It also includes a connection rear sleeve, which is arranged on the outer periphery of the connection body, and the control sleeve is arranged between the connection rear sleeve and the connection body.
7. A quick-change tool connection mechanism according to claim 6, characterized in that: The connection rear sleeve and the control sleeve are of a split structure. A third elastic limiter is arranged in the connection rear sleeve, and the third elastic limiter provides an axial support force for the connection rear sleeve.
8. A quick-change tool connection mechanism according to any one of claims 1 to 7, characterized in that: A control sleeve mating surface is arranged on the outer circumference side of the connecting body, and a control sleeve limiting surface which is adapted to be connected with the connecting body is arranged on the inner circumference side of the control sleeve. Both the control sleeve mating surface and the control sleeve limiting surface contain planes, and the two cooperate to realize the circumferential limitation of the control sleeve relative to the connecting body.
9. A quick-change tool connection mechanism according to any one of claims 1 to 7, characterized in that: The limiting component is a locking ball structure movably connected in the movable through hole of the limiting component.
10. The quick-change tool connection mechanism according to claim 2, characterized in that: A connecting groove structure adapted to be connected with the first elastic limiting member is arranged on the outer peripheral side of the control sleeve.