Quick-change connector, tool handle and tool rod

Abstract

The utility model provides a quick-change connector, a tool handle and a tool rod. The quick-change connector comprises a base body, an inner core assembly, a conversion shaft and a conversion piece, wherein the inner core assembly and the conversion shaft are arranged in the base body, and the conversion piece is movably installed outside the base body. The inner core assembly comprises at least two inner core units and an elastic ring, and the outer peripheral surface of each inner core unit is provided with an arc-shaped convex block; an insertion limiting part is arranged outside the base body; the base body is provided with a plurality of windows. The conversion piece can drive the conversion shaft to be switched and positioned at the current station; when the conversion shaft is located at the base body inserting station, the arc-shaped protruding blocks retract into the base body in a one-to-one correspondence mode. When the conversion shaft is located at a base body threaded connection station, the conversion shaft overcomes the elastic force of the elastic ring to expand the inner core assembly outwards in the radial direction, so that all the arc-shaped protruding blocks penetrate out of all the windows of the containing cavity in a one-to-one correspondence mode to form threaded connection parts. Compared with a tool rod capable of switching multiple types of tool heads in the prior art, the tool rod is more convenient to use, and the problem that the tool rod cannot be normally used due to the fact that the connecting piece is lost can be solved.

Description

Technical Field

[0001] The present application relates to the field of tools, and in particular to a quick-change connector, a tool handle, and a tool rod. Background Art

[0002] A tool rod capable of switching between multiple types of tool heads usually includes a universal tool handle, with a connector connected to one axial end of the tool handle (usually considered to be its front end) so that different types of tool heads can be selectively connected to the tool handle as needed, and then the corresponding tool head can be used to work. There are many different tool heads to choose from, among which, in order to cooperate with different working methods, some tool heads need to be threadedly connected to the connector at the front end of the tool handle, and some tool heads need to be plugged into the connector at the front end of the tool handle. In the prior art, in order to adapt to the different connection methods of different tool heads, the front end of the tool handle is usually equipped with a connector that is plugged into the tool head and a connector that is threadedly connected to the tool head. When in use, the connector is selected according to the connection method of the selected tool head, and the connector is first assembled with the tool handle, and then the selected tool head is assembled with the corresponding connector.

[0003] In the above-mentioned prior art, for a tool rod capable of switching between multiple types of tool heads, a structure using one tool handle and two connecting parts to adapt to tool heads with different connection methods has at least the following problems: (1) the process of replacing the connecting parts is complicated and inconvenient to use; (2) the replacement of the two connecting parts makes the connecting parts easy to be lost, affecting the normal use of the tool rod. Utility Model Content

[0004] The purpose of this application is to provide a quick-change connector, a tool handle and a tool rod to alleviate the above-mentioned technical problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a quick-change connector, comprising a base, an inner core assembly, and a conversion mechanism;

[0007] The conversion mechanism includes a conversion shaft and a conversion member connected to one end of the conversion shaft;

[0008] The inner core assembly includes at least two inner core units and an elastic ring sleeved on the outside of all the inner core units, wherein the elastic ring circumferentially constrains all the inner core units to be arranged circumferentially around the conversion shaft and to be butted against each other in pairs; an arc-shaped protrusion extending along the direction of the spiral line rotating around the conversion shaft is provided on the outer circumference of each inner core unit;

[0009] The base includes a housing cavity, which passes through at least the end surface of the first axial end of the base; the inner core assembly and the conversion shaft are both arranged inside the housing cavity; the outer peripheral surface of the first axial end of the base is provided with an insertion limit portion; and a plurality of windows are provided on the outer peripheral surface of the base for each of the arc-shaped protrusions to pass through or retract into the housing cavity in a one-to-one correspondence;

[0010] The conversion part is movably installed on the outside of the base, and can carry the conversion shaft to switch between the base plug-in station and the base threaded connection station and be positioned at the current station; when the conversion shaft is in the base plug-in station, each of the arc-shaped protrusions is retracted into the interior of the accommodating cavity one by one; when the conversion shaft is in the base threaded connection station, the conversion shaft overcomes the elastic force of the elastic ring and radially opens the inner core component outward, so that each of the arc-shaped protrusions passes through each window of the accommodating cavity one by one to form a threaded connection part, and along the radial direction of the base, the height of the threaded connection part is greater than the height of the plug-in limit part.

[0011] When in use, the first axial end of the base in the quick-change connector provided by this embodiment is fixedly connected to one axial end of the tool handle to form a universal tool handle; the conversion part is movable relative to the base, so that the conversion part carries the conversion shaft to switch between the base plug-in position and the base threaded connection position and is positioned at the current position, thereby realizing the function of adapting to tool heads with both plug-in and threaded connection methods through one quick-change connector. Compared with the structure in the prior art that a tool rod that can switch multiple types of tool heads adopts one tool handle with two connecting parts to adapt to tool heads with different connection methods, this embodiment simplifies the assembly process between different types of tool heads and tool handles, is more convenient for users to use, and avoids the problem of the tool rod being unable to be used normally due to the loss of the connecting part.

[0012] Further:

[0013] In an optional embodiment of the present application, the inner core assembly includes two inner core units; the conversion shaft is a rotating shaft with an elliptical radial cross-section, and the conversion member is a knob. The conversion member can rotate relative to the base to drive the conversion shaft to rotate relative to the base, thereby switching between the base plug-in station and the base threaded connection station.

[0014] Optionally, a conversion positioning structure is provided between the conversion member and the base body, which can position the conversion member at the current position when the conversion member carries the conversion shaft to the base body plug-in position and the base body threaded connection position respectively.

[0015] Optionally, the conversion positioning structure includes a clamping protrusion provided on one of the end surface of the base body and the conversion member, and a clamping groove provided on the other.

[0016] Optionally, the conversion mechanism also includes an elastic energy storage component; a partition is provided inside the accommodating cavity of the base to divide the accommodating cavity into a first accommodating cavity close to the first axial end of the base and a second accommodating cavity close to the second axial end of the base, the inner core component is arranged in the first accommodating cavity, and the elastic energy storage component is arranged in the second accommodating cavity.

[0017] The elastic energy storage component includes a baffle, an inner core bolt and an inner core spring; the inner core bolt passes through the baffle and the partition and is threadedly connected to the end face of the second end of the base; the inner core spring is sleeved on the outside of the inner core bolt, and one end of the inner core spring abuts the partition, and the other end of the inner core spring abuts the baffle; the conversion part can overcome the elastic force of the inner core spring, move relative to the base from the second end of the base toward the first end of the base, and reset under the elastic force of the inner core spring.

[0018] In an optional embodiment of the present application, the outer peripheral surface of the inner core unit is provided with a limiting groove for axially limiting the elastic ring; and / or, the elastic ring includes at least a first elastic ring near one axial end of the inner core unit and a second elastic ring near the other axial end of the inner core unit. In the embodiment of the present application, "and / or" means that the first feature before "and / or" and the second feature after "and / or" include the following specific settings: (1) only the first feature is provided, and the second feature is not provided; (2) only the second feature is provided, and the first feature is not provided; (3) the first feature and the second feature are provided at the same time.

[0019] In an optional embodiment of the present application, an elastic locking mechanism is further provided on the base. The elastic locking mechanism includes a pressure handle, a rotating pin, and a pressure handle spring; the pressure handle extends axially along the base, and the middle portion of the pressure handle is rotatably mounted on the outer surface of the base via the rotating pin; the end of the pressure handle axially facing the first end of the base is the front end of the pressure handle, the other end of the pressure handle axially is the rear end of the pressure handle, and the side surface of the pressure handle facing the base is the inner side surface of the pressure handle, satisfying the following conditions: one end of the pressure handle spring is fixedly connected to a portion of the inner side surface of the pressure handle near the rear end, the other end of the pressure handle spring is fixedly connected or limitedly connected to the outer peripheral surface of the base; a portion of the inner side surface of the pressure handle near the front end is provided with a limiting protrusion protruding toward the base.

[0020] In an optional embodiment of the present application, the base includes a first half shell and a second half shell that are radially butted against each other, and the first half shell and the second half shell are fixedly connected together by a connecting assembly.

[0021] In a second aspect, an embodiment of the present application provides a tool handle, comprising a gripping rod and a quick-change connector according to any one of the aforementioned embodiments, wherein one axial end of the gripping rod is fixedly connected to the second end of the base.

[0022] In the third aspect, an embodiment of the present application also provides a tool rod, comprising a first tool head, a second tool head and the tool handle provided in the second aspect; the first tool head can be plugged into the first end of the base when the conversion shaft is in the base plug-in position; the inner circumferential surface of the axial upper end of the second tool head is provided with an internal thread, and the internal thread can be threadedly connected to the threaded connection part of the first end of the base when the conversion shaft is in the base threaded connection position.

[0023] Since the tool handle provided in the second aspect and the tool rod provided in the third aspect of the embodiment of the present application both include the quick-change connector provided in the first aspect, the tool handle and tool rod provided in the embodiment of the present application can achieve all the beneficial effects that the quick-change connector provided in the first aspect can achieve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A front view of the overall structure of the quick-change connector provided in an embodiment of the present application when the conversion shaft is in the base plugging position;

[0026] Figure 2 A top view of the overall structure of the quick-change connector provided in an embodiment of the present application when the conversion shaft is in the base plugging position;

[0027] Figure 3 A front sectional view of the overall structure of the quick-change connector provided in an embodiment of the present application when the conversion shaft is in the base plugging position;

[0028] Figure 4 A front view of the overall structure of the quick-change connector provided in an embodiment of the present application when the conversion shaft is in the base thread connection position;

[0029] Figure 5 A top view of the overall structure of the quick-change connector provided in an embodiment of the present application when the conversion shaft is in the base thread connection position;

[0030] Figure 6A front sectional view of the overall structure of the quick-change connector provided in an embodiment of the present application when the conversion shaft is in the base thread connection position;

[0031] Figure 7 An exploded isometric view of the overall structure of the quick-change connector provided in an embodiment of the present application when the conversion shaft is in the base thread connection position;

[0032] Figure 8 This is a schematic diagram of the axonometric structure of the quick-change connector provided in an embodiment of the present application in a docking state between the first half shell and the second half shell of the base;

[0033] Figure 9 for Figure 8 A schematic diagram of the internal structure of the first half shell or the second half shell of the middle base;

[0034] Figure 10 This is a schematic diagram of the overall structure of the tool handle provided in an embodiment of the present application.

[0035] Icons: 1-base; 111-first half shell; 112-second half shell; 113-base bolt; 114-positioning ring; 100-accommodating chamber; 110-first accommodating chamber; 120-second accommodating chamber; 101-partition plate; 102-elastic ring groove; 103-positioning ring groove; 104-bolt through hole; 105-spring positioning part; 11-insertion limit part; 12-window; 2-inner core assembly; 21-inner core unit; 211-arc-shaped protrusion; 212-limiting groove; 22- Elastic ring; 221-first elastic ring; 222-second elastic ring; 31-conversion shaft; 32-conversion member; 33-conversion positioning structure; 331-clamping protrusion; 332-clamping groove; 4-elastic energy storage component; 41-blocking plate; 42-inner core bolt; 43-inner core spring; 44-fastening bolt; 5-elastic locking mechanism; 51-pressure handle; 511-limiting protrusion; 5111-locking pin; 52-rotating pin; 53-pressure handle spring; 6-holding rod; 61-quick locking mechanism. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0038] It should be noted that like reference numerals and letters denote similar items in the drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0039] In the description of this application, it is necessary to explain:

[0040] Unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediary, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0041] The directions or positional relationships indicated by the terms "front", "rear", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting this application.

[0042] The terms "first", "second", "third", etc. are only used to distinguish and describe, and do not indicate the total number, or relative position in time and / or space, and cannot be understood as indicating or implying relative importance.

[0043] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. Unless there is a conflict, the features of the following embodiments and the optional embodiments in the embodiments can be combined with each other.

[0044] Example 1

[0045] This embodiment provides a quick-change connector, referring to Figures 1 to 9The quick-change connector includes a base 1, an inner core assembly 2, and a conversion mechanism. The conversion mechanism includes a conversion shaft 31 and a conversion member 32 connected to one end of the conversion shaft 31. The inner core assembly 2 includes at least two inner core units 21 and an elastic ring 22 sleeved on the outside of all the inner core units 21. The elastic ring 22 circumferentially constrains all the inner core units 21 to be arranged circumferentially around the conversion shaft 31 and to be connected in pairs. The outer circumference of each inner core unit 21 is respectively provided with an arc-shaped protrusion 211 extending along the direction of the spiral line rotating around the conversion shaft 31. The base 1 includes a accommodating cavity 100, which passes through at least the end surface of the first axial end of the base 1. The inner core assembly 2 and the conversion shaft 31 are both disposed within the accommodating cavity 100. The outer circumferential surface of the first axial end of the base 1 is provided with an insertion limit portion 11. A plurality of windows 12 are opened on the outer circumferential surface of the base 1 for each arc-shaped protrusion 211 to pass through or retract into the accommodating cavity 100.

[0046] The conversion part 32 is movably installed on the outside of the base 1, and can carry the conversion shaft 31 to switch between the base 1 plug-in position and the base 1 threaded connection position and position itself at the current position; when the conversion shaft 31 is in the base 1 plug-in position, each arc-shaped protrusion 211 is retracted into the accommodating cavity 100 one by one; when the conversion shaft 31 is in the base 1 threaded connection position, the conversion shaft 31 overcomes the elastic force of the elastic ring 22 and radially expands the inner core component 2 outward, so that each arc-shaped protrusion 211 passes through each window 12 of the accommodating cavity 100 one by one to form a threaded connection part, and along the radial direction of the base 1, the height of the threaded connection part is greater than the height of the plug-in limit part 11.

[0047] When using, refer to Figure 10 The first axial end of the base 1 in the quick-change connector provided in this embodiment is fixedly connected to one axial end of the tool handle to form a universal tool handle; the movable conversion part 32 relative to the base 1 enables the conversion part 32 to switch between the base 1 plug-in position and the base 1 threaded connection position and be positioned at the current position with the conversion shaft 31, thereby realizing the function of adapting to tool heads of both plug-in and threaded connection modes through one quick-change connector. Compared with the structure in the prior art of using one tool handle with two connecting parts to adapt to tool heads of different connection modes for a tool rod that can switch multiple types of tool heads, this embodiment simplifies the assembly process between different types of tool heads and tool handles, is more convenient for users to use, and avoids the problem of the tool rod being unable to be used normally due to the loss of the connecting part.

[0048] In this embodiment, the plug-in limit portion 11 provided on the outer peripheral surface of the first end of the base body 1 in the axial direction is used for plugging with the tool head. The plug-in limit portion 11 can be, but is not limited to, in the form of Figures 1 to 9The spiral protrusion shown is designed to be smaller in height along the radial direction of the base 1 (lower than the height of the threaded connection part required for threaded connection), which provides a certain friction force during insertion to prevent the tool head from falling off after insertion. It should be noted that designing the insertion limit part 11 into such a spiral protrusion structure is only a specific optional structural form of the insertion limit part 11, and is not a limitation on the structure. For example, but not limited to, in other optional embodiments, the insertion limit part 11 can also be a multi-circle annular protrusion or other anti-slip pattern structure arranged at intervals along the axial direction of the base 1, or other optional structure that can improve the reliability of insertion.

[0049] In addition, in this embodiment, the specific connection method between the conversion member 32 and the conversion shaft 31 includes but is not limited to the following: Figure 3 and Figure 6 As shown, the two are connected as one piece or bonded together or fixed together by fastening bolts 44 or other fixing members, so that the movable conversion member 32 can move with the conversion shaft 31.

[0050] In this embodiment, there are many specific implementation methods for the movable conversion member 32 relative to the base body 1, so that the conversion member 32 carries the conversion shaft 31 to switch between the base body 1 plug-in station and the base body 1 threaded connection station. For example, but not limited to, setting the conversion shaft 31 as a stepped shaft, using the conversion member 32 to axially move the conversion shaft 31 relative to the base body 1, when the larger diameter portion of the conversion shaft 31 contacts multiple inner core components 2, the elastic force of the elastic ring 22 can be overcome to radially open the inner core components 2 outward, so that each arc-shaped protrusion 211 passes through each window 12 of the base body 1 accommodating cavity 100 to form a threaded connection portion for threaded connection with the tool head; when the smaller diameter portion of the conversion shaft 31 contacts multiple inner core components 2, the elastic ring 22 is reset, and each arc-shaped protrusion 211 is retracted into the accommodating cavity 100 one by one, and is plugged into the tool head through the plug-in limit portion 11 at the first axial end of the base body 1, or other optional implementation methods.

[0051] In order to facilitate manufacturing and improve stability during use, continue to refer to Figures 1 to 9 In some optional implementations of this embodiment, the inner core assembly 2 includes two inner core units 21; the conversion shaft 31 is a rotating shaft with an elliptical radial cross-section, and the conversion member 32 is a knob. The conversion member 32 can rotate relative to the base 1 to rotate the conversion shaft 31 relative to the base 1, thereby switching between the base 1 plug-in position and the base 1 threaded connection position. This structure is simple and easy to manufacture. In addition, compared to designing three or more inner core units 21, providing two opposing inner core units 21 can avoid the problem of structural failure caused by skew movement between adjacent inner core units 21 during radial expansion or retraction, thereby increasing the operational stability and reliability of the structure of the embodiment of the present application.

[0052] In this embodiment, there are also multiple optional implementations for the specific positioning method of positioning the conversion shaft 31 at the current work position after the movable conversion member 32 relative to the base 1 completes the switching of the work position of the conversion shaft 31. For example, but not limited to, a damping pad or direct friction fit is provided between the conversion shaft 31 and the inner wall of the accommodating chamber 100. When an external force is applied to the conversion shaft 31 by the conversion member 32, the conversion shaft 31 can move relative to the inner wall of the accommodating chamber 100. When the external force is removed, the conversion shaft 31 automatically frictionally cooperates with the damping pad or the inner wall of the accommodating chamber 100 to prevent the conversion shaft 31 from moving, thereby realizing the function of positioning at the current work position. Alternatively, in some optional implementations of this embodiment, a conversion positioning structure 33 is provided between the conversion member 32 and the base 1, which can position the conversion member 32 at the current work position when the conversion member 32 carries the conversion shaft 31 to the plug-in work position of the base 1 and the threaded connection work position of the base 1. The conversion positioning structure 33 has a variety of optional structures, for example, a snap-on structure is provided on the base 1, the snap-on is opened to release the conversion member 32 when the conversion member 32 is needed to be movable, the snap-on is fastened to fix the conversion member 32 when the conversion member 32 needs to be positioned, or other optional implementations.

[0053] When the inner core assembly 2 includes two inner core units 21; the conversion shaft 31 is a rotating shaft with an elliptical radial cross section, the conversion member 32 is a knob, and the conversion member 32 can rotate relative to the base 1 to rotate with the conversion shaft 31 relative to the base 1, thereby switching between the base 1 plug-in station and the base 1 threaded connection station, refer to Figures 1 to 9 In some optional embodiments, the conversion positioning structure 33 includes a snap-fitting protrusion 331 provided on one of the end surface of the base 1 and the conversion member 32, and a snap-fitting groove 332 provided on the other; wherein, the snap-fitting protrusion 331 and the snap-fitting groove 332 are preferably provided with at least two respectively, and during positioning, each snap-fitting protrusion 331 falls into the corresponding snap-fitting groove 332 to achieve positioning.

[0054] Continue to refer to Figure 3 and Figure 6 Optionally, the conversion mechanism may further include an elastic energy storage component 4, which may be provided simultaneously or selectively with the conversion positioning structure 33 formed by the above-mentioned clamping protrusion 331 and the clamping groove 332. Specifically, in combination with Figure 8 and Figure 9A partition 101 is provided inside the accommodating chamber 100 of the base 1 to divide the accommodating chamber 100 into a first accommodating chamber 110 near the first axial end of the base 1 and a second accommodating chamber 120 near the second axial end of the base 1. The inner core assembly 2 is provided in the first accommodating chamber 110, and the elastic energy storage assembly 4 is provided in the second accommodating chamber 120. The elastic energy storage assembly 4 includes a baffle 41, an inner core bolt 42, and an inner core spring 43. The inner core bolt 42 passes through the baffle 41 and the partition 101 and is then threadedly connected to the end surface of the second end of the base 1. The inner core spring 43 is sleeved on the outside of the inner core bolt 42, with one end of the inner core spring 43 abutting the partition 101 and the other end of the inner core spring 43 abutting the baffle 41. The conversion member 32 can overcome the elastic force of the inner core spring 43, move relative to the base 1 from the second end of the base 1 toward the first end of the base 1, and return to its original position under the elastic force of the inner core spring 43. When it is necessary to rotate the conversion member 32 relative to the base 1, the conversion member 32 can be first pulled along the axial direction of the base 1 from its second end toward the first end to overcome the elastic force of the inner core spring 43, so that the conversion member 32 is separated from the base 1 and the conversion positioning structure 33 is released from the positioning state. At this time, after the conversion member 32 is rotated and the work station switching is completed with the conversion shaft 31, the conversion member 32 is reset under the elastic force of the inner core spring 43, and the conversion positioning structure 33 is restored to the positioning state, thereby realizing rapid switching and locking of the work stations.

[0055] In order to further increase the stability of this embodiment and the working reliability of each structure, in this embodiment, optionally, as Figure 7 As shown, a limiting groove 212 for axially limiting the elastic ring 22 is provided on the outer circumference of the inner core unit 21; Figure 3 、 Figure 5 and Figure 7 As shown, the elastic ring 22 at least includes a first elastic ring 221 close to one axial end of the inner core unit 21 and a second elastic ring 222 close to the other axial end of the inner core unit 21. Figure 9 As shown, an elastic ring groove 102 is further provided on the inner circumference of the base body 1 .

[0056] In addition, in order to further enhance the docking stability between the first end of the base body 1 in the axial direction and the tool head after assembly, in some optional implementations of this embodiment, an elastic locking mechanism 5 is further provided on the base body 1; Figures 1 to 7As shown, the elastic locking mechanism 5 includes a pressure handle 51, a rotating pin 52 and a pressure handle spring 53; the pressure handle 51 extends axially along the base 1 and the middle part of the pressure handle 51 is rotatably mounted on the outer surface of the base 1 through the rotating pin 52; the end of the pressure handle 51 axially facing the first end of the base 1 is the front end of the pressure handle 51, the other end of the pressure handle 51 axially is the rear end of the pressure handle 51, and the side surface of the pressure handle 51 facing the base 1 is the inner side surface of the pressure handle 51, which satisfies: one end of the pressure handle spring 53 is fixedly connected to the position near the rear end on the inner side surface of the pressure handle 51, and the other end of the pressure handle spring 53 is fixedly connected or limitedly connected to the outer peripheral surface of the base 1 through the spring positioning part 105, and the structure of the spring positioning part 105 is, for example but not limited to, Figure 7 and Figure 8 As shown, it includes a groove provided on the outer peripheral surface of the base 1 and a protrusion provided inside the groove, so that the other end of the pressure handle spring 53 is sleeved on the outside of the protrusion; a limiting protrusion 511 protruding toward the base 1 is provided on the inner side surface of the pressure handle 51 near the front end. In this structure, after the tool head is docked with the first axial end of the base 1, a part of the tool head 1 is inserted between the front end of the pressure handle 51 and the outer peripheral surface of the base 1. Under the elastic restoring force of the pressure handle spring 53, the limiting protrusion 511 of the pressure handle 51 presses the connecting end of the tool head 1 and the base 1 to further lock the tool head 1. In some more preferred embodiments, the outer peripheral surface of the connecting end of the tool head 1 used to be connected to the base 1 is provided with a positioning groove that cooperates with the limiting protrusion 511 to prevent the tool head 1 from rotating relative to the base 1 during use. The specific structural form of the limiting protrusion 511 includes but is not limited to a structure that is integrally connected to the inner side of the pressure handle 51, or a locking pin 5111 fixedly installed in the pin hole at the front end of the pressure handle 51.

[0057] In addition, in order to further facilitate assembly, in this embodiment, reference is made to Figures 1 to 9 The base 1 includes a first half shell 111 and a second half shell 112 connected radially, and the first half shell 111 and the second half shell 112 are fixedly connected together by a connecting assembly, which may include but is not limited to a base bolt 113 and a positioning ring 114. A positioning ring groove 103 and a bolt through hole 104 are respectively set on the first half shell 111 and the second half shell 112. The positioning ring groove 103 is located on the end surface of the axial first end of the shell, and the positioning ring 114 is arranged inside the positioning ring groove 103 to close the axial first end of the first half shell 111 and the axial first end of the second half shell 112. The bolt through hole 104 is provided on the circumferential surface of the axial second end of the shell, and the base bolt passes through the first half shell 111 and the second half shell 112 to fix the first half shell 111 and the second half shell 112 together.

[0058] Example 2

[0059] This embodiment provides a tool handle, referring to Figure 10The tool handle includes a gripping rod 6 and a quick-change connector provided by any optional embodiment of the first embodiment. One end of the gripping rod 6 is fixedly connected to the second end of the base 1 in the axial direction. The connection method includes but is not limited to the following: Figure 10 As shown, through a quick lock mechanism 61 that is the same as or similar to the elastic locking mechanism 5 of the embodiment, after the second axial end of the base 1 of the quick change connector is inserted into one axial end of the holding rod 6, the base 1 of the quick change connector is locked to the holding rod 6.

[0060] Example 3

[0061] This embodiment provides a tool rod, which includes a first tool head, a second tool head and a tool handle provided in Example 2; the first tool head can be plugged into the first end of the base 1 when the conversion shaft 31 is in the base 1 plug-in position; the inner circumferential surface of the axial upper end of the second tool head is provided with an internal thread, and the internal thread can be threadedly connected to the threaded connection part of the first end of the base 1 when the conversion shaft 31 is in the base 1 threaded connection position.

[0062] Since the tool handle provided in the second embodiment and the tool rod provided in the third embodiment both include the quick-change connector described in the first embodiment, the tool handle and tool rod provided in the present embodiment can achieve all the beneficial effects that the quick-change connector in the first embodiment can achieve. The specific structure and the effects that can be achieved can be obtained by referring to the optional or preferred implementation methods in the first embodiment.

[0063] Finally, it should be noted that the above embodiments and their optional implementation methods in this specification are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned optional implementation methods, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application. In addition, it is emphasized again that the features of the embodiments and the optional implementation methods in the embodiments in this specification can be combined with each other unless there is a conflict.

Claims

1. A quick-change connector, characterized in that: It comprises a base (1), an inner core component (2) and a conversion mechanism; The conversion mechanism comprises a conversion shaft (31) and a conversion member (32) connected to one end of the conversion shaft (31); The inner core assembly (2) comprises at least two inner core units (21) and an elastic ring (22) sleeved on the outside of all the inner core units (21), wherein the elastic ring (22) circumferentially constrains all the inner core units (21) to be arranged circumferentially around the conversion shaft (31) and to be butted against each other in pairs; an arc-shaped protrusion (211) extending along the direction of a spiral line rotating around the conversion shaft (31) is provided on the outer circumference of each inner core unit (21); The base (1) includes a housing cavity (100), and the housing cavity (100) passes through at least the end surface of the first axial end of the base (1); the inner core component (2) and the conversion shaft (31) are both arranged inside the housing cavity (100); the outer peripheral surface of the first axial end of the base (1) is provided with a plug-in limit portion (11); a plurality of windows (12) are provided on the outer peripheral surface of the base (1) for each of the arc-shaped protrusions (211) to pass through or retract into the housing cavity (100) in a one-to-one correspondence; The conversion member (32) is movably mounted on the outside of the base (1), and can carry the conversion shaft (31) to switch between the base (1) plug-in station and the base (1) threaded connection station and be positioned at the current station; when the conversion shaft (31) is in the base (1) plug-in station, each of the arc-shaped protrusions (211) is retracted into the interior of the accommodating cavity (100) in a one-to-one correspondence; when the conversion shaft (31) is in the base (1) threaded connection station, the conversion shaft (31) overcomes the elastic force of the elastic ring (22) and radially expands the inner core component (2) outward, so that each of the arc-shaped protrusions (211) passes through each of the windows (12) of the accommodating cavity (100) in a one-to-one correspondence to form a threaded connection portion, and along the radial direction of the base (1), the height of the threaded connection portion is greater than the height of the plug-in limit portion (11).

2. The quick-change connector according to claim 1, characterized in that: The inner core assembly (2) includes two inner core units (21); the conversion shaft (31) is a rotating shaft with an elliptical radial cross-section, and the conversion member (32) is a knob. The conversion member (32) can rotate relative to the base (1) to drive the conversion shaft (31) to rotate relative to the base (1), thereby switching between the base (1) plug-in station and the base (1) threaded connection station.

3. The quick-change connector according to claim 2, characterized in that: A conversion positioning structure (33) is provided between the conversion member (32) and the base body (1), which can respectively position the conversion member (32) at the current position when the conversion member (32) carries the conversion shaft (31) to the base body (1) plug-in position and the base body (1) threaded connection position.

4. The quick-change connector according to claim 3, characterized in that: The conversion positioning structure (33) comprises a clamping protrusion (331) provided on one of the end surface of the base body (1) and the conversion member (32), and a clamping groove (332) provided on the other.

5. The quick-change connector according to any one of claims 2 to 4, characterized in that: The conversion mechanism further includes an elastic energy storage component (4); A partition (101) is provided inside the accommodating cavity (100) of the base (1) to divide the accommodating cavity (100) into a first accommodating cavity (110) close to the first axial end of the base (1) and a second accommodating cavity (120) close to the second axial end of the base (1); the inner core component (2) is provided in the first accommodating cavity (110), and the elastic energy storage component (4) is provided in the second accommodating cavity (120); The elastic energy storage assembly (4) comprises a baffle (41), an inner core bolt (42) and an inner core spring (43); The inner core bolt (42) passes through the baffle (41) and the partition (101) and is then threadedly connected to the end surface of the second end of the base (1); The inner core spring (43) is sleeved on the outside of the inner core bolt (42), and one end of the inner core spring (43) abuts against the partition (101), and the other end of the inner core spring (43) abuts against the baffle (41); the conversion member (32) can overcome the elastic force of the inner core spring (43), move from the second end of the base body (1) toward the first end of the base body (1) relative to the base body (1) to separate from the base body (1), and reset under the elastic force of the inner core spring (43).

6. The quick-change connector according to claim 1, characterized in that: The outer peripheral surface of the inner core unit (21) is provided with a limiting groove (212) for axially limiting the elastic ring (22); And / or, the elastic ring (22) comprises at least a first elastic ring (221) close to one axial end of the inner core unit (21) and a second elastic ring (222) close to the other axial end of the inner core unit (21).

7. The quick-change connector according to claim 1, characterized in that: The base (1) is also provided with an elastic locking mechanism (5); The elastic locking mechanism (5) comprises a pressing handle (51), a rotating pin (52) and a pressing handle spring (53); The pressing handle (51) extends axially along the base (1) and the middle portion of the pressing handle (51) is rotatably mounted on the outer surface of the base (1) via the rotating pin (52); one end of the pressing handle (51) facing the first end of the base (1) in the axial direction is the front end of the pressing handle (51), the other end of the pressing handle (51) in the axial direction is the rear end of the pressing handle (51), and the side surface of the pressing handle (51) facing the base (1) is the inner side surface of the pressing handle (51), satisfying the following: One end of the pressure handle spring (53) is fixedly connected to a portion of the inner side surface of the pressure handle (51) near the rear end, and the other end of the pressure handle spring (53) is fixedly connected or limitedly connected to the outer peripheral surface of the base (1); a portion of the inner side surface of the pressure handle (51) near the front end is provided with a limiting protrusion (511) protruding toward the base (1).

8. The quick-change connector according to claim 1, characterized in that: The base body (1) comprises a first half shell (111) and a second half shell (112) that are butted together in a radial direction, and the first half shell (111) and the second half shell (112) are fixedly connected together via a connecting assembly.

9. A tool handle, characterized in that: It comprises a gripping rod (6) and the quick-change connector according to any one of claims 1 to 8, wherein one axial end of the gripping rod (6) is fixedly connected to the second end of the base (1).

10. A tool bar, characterized in that: It comprises a first tool head, a second tool head and the tool handle according to claim 9; the first tool head can be plugged into the first end of the base body (1) when the conversion shaft (31) is in the plug-in position of the base body (1); the inner peripheral surface of the axial upper end of the second tool head is provided with an internal thread, and the internal thread can be threadedly connected to the threaded connection part of the first end of the base body (1) when the conversion shaft (31) is in the threaded connection position of the base body (1).

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