Multifunction quick-change drill chuck

Abstract

The utility model provides a kind of multifunctional quick-change drill chuck, including drill body, drill handle clamping mechanism and the connecting mechanism of shank groove drill bit, the connecting mechanism includes limit pin and reset coil spring, the utility model is also provided rotatable quick-change operation control sleeve and lock piece in its rear part, the front end of reset coil spring is fixedly connected, rear end and the quick-change operation control sleeve connection can drive quick-change operation control sleeve to be reset rotation in locking position direction and keep in locking position, the quick-change operation control sleeve includes control structure, the hole wall of driving shaft connecting hole is provided with lock hole, the lock piece is located in the lock hole and is matched with the control structure, when quick-change operation control sleeve rotates to locking position, it can be extruded to protrude in drill bit insertion hole. The utility model not only keeps the function of original and cylindrical shank drill bit's shank groove drill bit, at the same time, simple structure is used to realize the quick-change function of multifunctional drill chuck.

Description

Technical Field

[0001] This utility model relates to a multi-functional drill chuck, and more particularly to a multi-functional drill chuck that can be quickly changed. The multi-functional drill chuck is compatible with both shank drill bits and ordinary cylindrical shank drill bits. Background Technology

[0002] For multi-functional drill chucks, a rotating sleeve, a pull-down sleeve, and a rear cover are provided. The rotating sleeve drives a nut to clamp and release ordinary cylindrical shank drill bits using jaws. The pull-down sleeve drives a limit pin to retract via a downward movement, unlocking the shank drill bit. A compression spring is provided between the pull-down sleeve and the rear cover. The spring's return causes the pull-down sleeve to push upward, resetting the limit pin (i.e., locking the shank drill bit). Patent CN1047748C discloses a drill chuck that fixes the motor shaft with a pin. Patent DE19914577B4 discloses a drill chuck without jaws that can only accommodate drill bits of a fixed diameter. Utility Model Content

[0003] The purpose of this utility model is to provide a multi-functional quick-change drill chuck that achieves quick-change functionality with a simple structure. To this end, this utility model adopts the following technical solution:

[0004] A multifunctional quick-change drill chuck includes a drill body, a drill shank clamping mechanism, and a connecting mechanism for a shank slot drill bit. The drill body has a drive shaft connecting hole at its rear and a drill bit insertion hole at its front. A limiting pin hole is provided in the wall of the drill bit insertion hole. The connecting mechanism includes a limiting pin and a return helical spring. The return helical spring is sleeved outside the rear of the drill body. The limiting pin is slidably located in the limiting pin hole. Driven by the return helical spring, the limiting pin can be pushed forward until its head enters the drill bit insertion hole. The multifunctional quick-change drill chuck... A rotatable quick-change operation control sleeve and a locking mechanism for the shank drill bit are also provided at the rear. The front end of the return helical spring is fixedly connected, and the rear end is connected to the quick-change operation control sleeve so as to drive the quick-change operation control sleeve to return to the locking position and remain in the locking position. The quick-change operation control sleeve includes a control structure. The wall of the drive shaft connection hole is provided with a locking hole. The locking element is located in the locking hole and cooperates with the control structure. When the quick-change operation control sleeve rotates to the locking position, it can be squeezed to protrude into the drill bit insertion hole.

[0005] Based on the above technical solutions, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:

[0006] The quick-change operation control sleeve includes a sleeve body and a control plate. The outer side of the control plate is connected to the sleeve body. The control plate has a central hole and is sleeved outside the rear part of the drill body. The control structure is set on the hole wall of the central hole.

[0007] The drive shaft connection hole at the rear of the drill body is divided into a drive section and a locking section, with the lock hole located in the locking section.

[0008] A rotation angle limiting fit structure for the quick-change operation control sleeve is also provided between the quick-change operation control sleeve and the drill body.

[0009] A limiting groove is also provided on the wall of the central hole, and a limiting component that cooperates with the limiting groove is provided on the drill body, forming a rotation angle limiting cooperation structure for the quick-change operation control sleeve.

[0010] The multi-functional quick-change drill chuck includes a limiting pin unlocking sleeve and a front support member. The front support member is ring-shaped and fits around the drill body. The front support member is connected to the limiting pin. The limiting pin unlocking sleeve is slidably mounted on the drill body and located in front of the quick-change operation control sleeve. The front support member is located inside the limiting pin unlocking sleeve. The limiting pin unlocking sleeve can push the front support member backward so that the head of the limiting pin can retract into the limiting pin hole. The front end and rear end of the return helical spring are connected to the front support member and the control plate, respectively, and are compressed between the front support member and the control plate. The drill body is connected to the rear limiting member of the quick-change operation control sleeve.

[0011] The quick-change operation control sleeve also includes an axial sliding sleeve and a front support member. The quick-change operation control sleeve is also capable of axial displacement. The front support member is connected to the limiting pin. The limiting pin unlocking sleeve and the sleeve body are rotatably connected and kept synchronous in the axial direction. A second support spring is also provided at the rear of the quick-change operation control sleeve.

[0012] The limiting pin unlocking sleeve and the sleeve body are engaged or connected axially together via a latch.

[0013] The limiting pin unlocking sleeve is provided with an inner liner. The inner liner is inserted into the quick-change operation control sleeve, which supports the quick-change operation control sleeve and helps to stabilize the rotation of the quick-change operation control sleeve.

[0014] This invention provides a multi-functional drill chuck, comprising two sets of connecting mechanisms for connecting different types of drill bits, and featuring quick unlocking of the motor shaft. A locking section and a driving section are located at the rear end of the drill body. This invention utilizes the existing spring in the multi-functional drill chuck to transform its function, not only maintaining its original function for shank slot drill bits, but also achieving a quick-change function based on the spring. This allows for the implementation of a quick-change function for the multi-functional drill chuck using a simple structure. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of Embodiment 1 of the present invention when the limiting pin is in the position of locking the shank slot drill bit.

[0016] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention when the axial sliding sleeve is pulled down and the limiting pin is pushed back into the limiting pin hole.

[0017] Figure 3 When the quick-change operation control sleeve of Embodiment 1 of this utility model is reset and rotated to the locked position, Figure 2 BB cross-sectional view.

[0018] Figure 4 When the quick-change operation control sleeve of Embodiment 1 of this utility model is reset and rotated to the unlocked position, Figure 2 BB cross-sectional view.

[0019] Figure 5 This is a schematic diagram of the drill body.

[0020] Figure 6 , Figure 7 This is a schematic diagram of the combined state of the front support member, the limiting pin, the reset helical spring, and the control plate in Embodiment 1 of this utility model.

[0021] Figure 8 This is a cross-sectional view of Embodiment 2 of the present invention when the limiting pin is in the position of locking the shank slot drill bit.

[0022] Figure 9 This is a schematic diagram of the second set and the set body assembly in Embodiment 2 of this utility model.

[0023] Figure 10 for Figure 9 CC section view.

[0024] Figure 11 In Embodiment 2 of this utility model, when the second set and the set body adopt a different connection method, Figure 9 CC section view.

[0025] Figure 12 , 13 Figures 1 and 14 are schematic diagrams of different implementations of the drive shaft connection hole. Detailed Implementation

[0026] Reference Figure 1-7 The multifunctional quick-change drill chuck provided by this utility model includes a drill body 1, a drill shank clamping mechanism, and a connecting mechanism for shank slot drill bits. The drill body has a drive shaft connecting hole 11 at the rear and a drill bit insertion hole 12 at the front. The hole wall of the drill bit insertion hole 12 has a limiting pin hole 13. In this utility model, the drive shaft connecting hole 11 is divided into a drive section 111 and a locking section 112. The drive section 111 can be located at the opening of the drive shaft connecting hole 11 and is provided with several connecting keys 113. The locking section 112 is used for quick-change functionality.

[0027] The drill shank clamping mechanism is a clamping mechanism for the cylindrical drill shank of a common cylindrical drill bit. It includes a nut 2, a rotating sleeve 3, and jaws 4. The drill body is provided with three inclined jaw holes, and the three jaws 4 pass through the jaw holes. The nut 2 is supported on the step in the middle of the drill body 1 and is threadedly connected to the jaws 4. The rotating sleeve 3 is connected to the nut through a connecting structure.

[0028] The connecting mechanism is for connecting shank groove drill bits, including a limiting pin 5 and a return helical spring 6. The return helical spring 6 is sleeved on the rear of the drill body 1. The limiting pin 5 is slidably located in the limiting pin hole 13 and can be pushed forward to its head and enter the drill bit insertion hole 12 under the drive of the return helical spring 6. The drill body is provided with an axial key 14 on the hole wall of the drill bit insertion hole 12 for connecting with the drill shank keyway of the shank groove drill bit.

[0029] The multi-functional quick-change drill chuck is further equipped with a rotatable quick-change operation control sleeve 7 and a locking element 70 at its rear. The front end of the return helical spring 6 is fixedly connected, and the rear end is connected to the quick-change operation control sleeve 7, enabling the quick-change operation control sleeve 7 to be driven to rotate back to the locking position after being rotated by external force and to remain in the locking position. It is a spring that combines torque and axial force. The quick-change operation control sleeve 7 includes a control structure. The wall of the drive shaft connecting hole 11 is provided with a locking hole 15. The locking hole is located in the locking section 112. The inner opening of the locking hole 15 is smaller than the hole diameter. The locking element 70 is located in the locking hole 15 and cooperates with the control structure. When the quick-change operation control sleeve 7 rotates to the locking position, it is squeezed and protrudes into the drill bit insertion hole 11. The locking element 70 can be a steel ball or a locking pin.

[0030] The quick-change operation control sleeve includes a sleeve body 71 and a control plate 72. The outer side of the control plate 72 is connected to the sleeve body 71, for example, by keyway fitting and welding. The control plate 72 is provided with a central hole 721 and is sleeved outside the rear part of the drill body 1. The control structure is provided on the hole wall of the central hole 721. The control structure is the circumferential hole wall 723 and the clearance groove 724 of the central hole 721. When the control sleeve 721 is rotated to the locked position, the circumferential hole wall 722 is aligned with the locking hole 15, and the locking member 70 is squeezed by the circumferential hole wall 723 to protrude into the drill bit insertion hole 11. When the control sleeve 721 is rotated to the unlocked position, the clearance groove 724 is aligned with the locking hole 15.

[0031] A limiting groove 722 is also provided on the wall of the central hole 721, and a limiting member 16 that cooperates with the limiting groove is provided on the drill body 1, such as a steel ball that is stuck on the surface of the drill body, forming a rotation angle limiting cooperation structure of the quick change operation control sleeve 7.

[0032] The multi-functional quick-change drill chuck includes a limiting pin unlocking sleeve 8 and a front support member 9. The front support member 9 is ring-shaped and fits around the drill body. The front support member 9 is connected to the limiting pin 5. The limiting pin unlocking sleeve 8 is slidably mounted on the drill body and located in front of the quick-change operation control sleeve 7. The front support member is located inside the limiting pin unlocking sleeve. The limiting pin unlocking sleeve 8 can push the front support member 9 backward so that the head of the limiting pin 5 can retract into the limiting pin hole 16. The front end and rear end of the return coil spring 6 are connected to the front support member 9 and the control plate 72 respectively (e.g., hooked into the front support member 9 and the control plate 72 respectively; reference numeral 725 is the hole on the control plate 72 for the spring to hook) and compressed between the front support member 9 and the control plate 72. The drill body 1 is connected to the rear limiting member of the quick-change operation control sleeve 7, such as a retaining spring 17.

[0033] In this embodiment, a self-locking mechanism is also provided for the clamping part of the cylindrical shank drill rod. The reference numeral 200 indicates the location of the self-locking mechanism. This utility model is applicable not only to structures with locks but also to ordinary structures without locks for the clamping part of the cylindrical shank drill rod.

[0034] Reference Figure 8-11 In this embodiment, the quick-change operation control sleeve 7 is also capable of axial displacement. The limiting pin unlocking sleeve 8 and the sleeve body 70 are rotatably connected and remain synchronized axially. A second support spring 73 is also provided at the rear of the quick-change operation control sleeve 7. The limiting pin unlocking sleeve 8 and the sleeve body 70 can be engaged by an annular groove and a protrusion 82 (e.g., Figure 10 (as shown) or via latch 83 (as shown) Figure 11 They are connected together axially in ways such as (as shown).

[0035] Figure 8-11 The structure provides better rotational stability for the quick-change operation control sleeve 7. Specifically, by utilizing the characteristic that the quick-change operation control sleeve 7 and the limiting pin unlocking sleeve 8 are axially joined and cannot be displaced relative to each other, the limiting pin unlocking sleeve 8 can provide better support for the quick-change operation control sleeve 7. That is, as... Figure 8 , 10 As described in section 11, the limiting pin unlocking sleeve 8 is provided with an inner liner 81. The inner liner 81 can be longer and inserted deeper into the quick-change operation control sleeve 7, thereby providing better support for the quick-change operation control sleeve 7 and making the rotation of the quick-change operation control sleeve 7 more stable.

[0036] exist Figure 8-11 In the middle, the same components use the same Figure 1-7 Same icon number.

[0037] Reference Figure 12-14This shows different implementations of the drive shaft connection hole 11 for the drive segment 111. Figure 12 For keyway to work with driver, Figure 13 For hexagonal hole mating drive, Figure 14 It is driven by a square hole.

[0038] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the protection scope of the present utility model.

[0039] It should be noted that the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this utility model are intended to cover non-exclusive inclusion. The terms "installed," "set," "equipped with," "connected," "linked," and "sleeve" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In the description of this utility model, it should be understood that the terms "one end," "the other end," "outer side," "inner side," "horizontal," "end," "length," "outer end," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are also used only for the sake of brevity in description and do not indicate or imply relative importance.

Claims

1. A multifunctional quick-change drill chuck, comprising a drill body, a drill shank clamping mechanism, and a connecting mechanism for a shank slot drill bit, wherein the drill body has a drive shaft connecting hole at the rear and a drill bit insertion hole at the front, the drill bit insertion hole having a limiting pin hole in its wall, the connecting mechanism comprising a limiting pin and a return helical spring, the return helical spring being sleeved on the rear of the drill body, the limiting pin being slidably located in the limiting pin hole, and the limiting pin being able to be pushed forward under the drive of the return helical spring until its head enters the drill bit insertion hole; characterized in that, The multi-functional quick-change drill chuck is further provided with a rotatable quick-change operation control sleeve and a locking element at its rear, which cooperate with the connecting mechanism of the shank slot drill bit at the front. The front end of the return helical spring is fixedly connected, and the rear end is connected to the quick-change operation control sleeve, which can drive the quick-change operation control sleeve to return to the locking position and remain in the locking position. The quick-change operation control sleeve includes a control structure. The hole wall of the drive shaft connecting hole is provided with a locking hole. The locking element is located in the locking hole and cooperates with the control structure. When the quick-change operation control sleeve rotates to the locking position, it can be squeezed to protrude into the drill bit insertion hole.

2. The multifunctional quick-change drill chuck as described in claim 1, characterized in that, The quick-change operation control sleeve includes a sleeve body and a control plate. The outer side of the control plate is connected to the sleeve body. The control plate has a central hole and is sleeved outside the rear part of the drill body. The control structure is set on the hole wall of the central hole.

3. A multifunctional quick-change drill chuck as described in claim 1, characterized in that, The drive shaft connection hole at the rear of the drill body is divided into a drive section and a locking section, with the lock hole located in the locking section.

4. A multifunctional quick-change drill chuck as described in claim 1, characterized in that, A rotation angle limiting fit structure for the quick-change operation control sleeve is also provided between the quick-change operation control sleeve and the drill body.

5. A multifunctional quick-change drill chuck as described in claim 2, characterized in that, A limiting groove is also provided on the wall of the central hole, and a limiting component that cooperates with the limiting groove is provided on the drill body, forming a rotation angle limiting cooperation structure for the quick-change operation control sleeve.

6. A multifunctional quick-change drill chuck as described in claim 2, characterized in that, The multi-functional quick-change drill chuck includes a limiting pin unlocking sleeve and a front support member. The front support member is ring-shaped and fits around the drill body. The front support member is connected to the limiting pin. The limiting pin unlocking sleeve is slidably mounted on the drill body and located in front of the quick-change operation control sleeve. The front support member is located inside the limiting pin unlocking sleeve. The limiting pin unlocking sleeve can push the front support member backward so that the head of the limiting pin can retract into the limiting pin hole. The front end and rear end of the return helical spring are connected to the front support member and the control plate, respectively, and are compressed between the front support member and the control plate. The drill body is connected to the rear limiting member of the quick-change operation control sleeve.

7. A multifunctional quick-change drill chuck as described in claim 6, characterized in that, The quick-change operation control sleeve also includes an axial sliding sleeve and a front support member. The quick-change operation control sleeve is also capable of axial displacement. The front support member is connected to the limiting pin. The limiting pin unlocking sleeve and the sleeve body are rotatably connected and kept synchronous in the axial direction. A second support spring is also provided at the rear of the quick-change operation control sleeve.

8. A multifunctional quick-change drill chuck as described in claim 7, characterized in that, The limiting pin unlocking sleeve and the sleeve body are engaged or connected together axially via a latch.

9. A multifunctional quick-change drill chuck as described in claim 6 or 7, characterized in that, The limiting pin unlocking sleeve is provided with an inner liner. The inner liner is inserted into the quick-change operation control sleeve, which supports the quick-change operation control sleeve and helps to stabilize the rotation of the quick-change operation control sleeve.

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