Quick-change mechanism for work heads and garden tools

Abstract

This utility model provides a quick-change mechanism for a working head and a garden tool, relating to the field of garden tool technology. The quick-change mechanism includes: a fixed base, a bushing, an axial elastic element, and a locking element; the bushing slides axially on the fixed base, and has a first position and a second position relative to the fixed base; the axial elastic element is installed between the fixed base and the bushing, and has a tendency to move the bushing from the first position to the second position; the locking element is installed on the fixed base and can lock the bushing in the second position, thus ensuring the axial position of the bushing is stable. The bushing is adapted to working tools such as soil loosening tools or grass rakes, ensuring the working tools are installed securely and reliably. When it is necessary to disassemble and replace the working tool, simply operate the locking element to the unlocked state, and the bushing moves axially from the second position to the first position to detach from the working tool, thus facilitating the disassembly and replacement of the working tool.

Description

Technical Field

[0001] This utility model relates to the field of garden tool technology, and in particular to a quick-change mechanism for working heads and a garden tool. Background Technology

[0002] Garden machinery (such as soil looseners and rakes) typically requires disassembly and replacement of the loosening or rake blades during use. Current disassembly and replacement procedures require the use of wrenches, screwdrivers, and other auxiliary tools, resulting in cumbersome processes and low efficiency. While the currently used elastic clamping blade fixing solution simplifies the disassembly and replacement process, in actual operation, when the blades become entangled in weeds or other foreign objects, generating a force sufficient to overcome the elastic clamping force, the blades may loosen, and in severe cases, may even detach. Utility Model Content

[0003] The purpose of this utility model is to provide a quick-change mechanism for working heads and garden tools to ensure that the working parts are installed securely and to improve the ease of disassembly and assembly of the working parts.

[0004] In the first aspect, the working head quick-change mechanism provided by this utility model includes: a fixed base, a bushing, an axial elastic element, and a locking element;

[0005] The bushing slides along its own axial direction to fit the fixed seat, and the bushing has a first working position and a second working position relative to the fixed seat;

[0006] The axial elastic element is installed between the fixed seat and the bushing, and the axial elastic element has a tendency to move the bushing from the first station to the second station.

[0007] The locking member is installed on the fixed base, and the locking member is used to lock the bushing in the second position.

[0008] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the bushing is provided with a socket and a relief groove communicating with the socket;

[0009] When the locking member is in the unlocked state, the locking member passes through the socket and is adapted to and opposite the relief groove;

[0010] When the locking member is in the locked state, the locking member is misaligned with the relief groove to prevent the bushing from sliding from the second station to the first station.

[0011] In conjunction with the first possible implementation of the first aspect, the present invention provides a second possible implementation of the first aspect, wherein the locking member includes: a button and a radial elastic member;

[0012] The button slides into the fixed base, the radial elastic element is installed between the button and the fixed base, and the radial elastic element has a tendency to switch the button from the unlocked state to the locked state.

[0013] In conjunction with the second possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the button has a protrusion adapted to the recessed groove;

[0014] When the button is in the unlocked state, the protrusion is positioned opposite to the recess.

[0015] When the button is in the locked state, the protrusion is misaligned with the clearance groove.

[0016] In conjunction with the second possible implementation of the first aspect, this utility model provides a fourth possible implementation of the first aspect, wherein the button is provided with a groove, and the fixing base is provided with a protrusion that slides within the groove;

[0017] The radial elastic element is installed between the protrusion and the button.

[0018] In conjunction with the first aspect, this utility model provides a fifth possible implementation of the first aspect, wherein the bushing is provided with at least two said insertion ports along the circumferential direction, and each said insertion port is connected to the relief groove;

[0019] The mounting base is equipped with a plurality of locking elements corresponding to the number of the sockets.

[0020] In conjunction with the first aspect, this utility model provides a sixth possible implementation of the first aspect, wherein the fixing base includes: a base and a cover connected to the base;

[0021] The bushing, the axial elastic element, and the locking element are all installed between the base and the seat cover.

[0022] Secondly, the garden tool provided by this utility model includes: a body, a transmission shaft, working components, and a quick-change mechanism for the working head as described in the first aspect;

[0023] The drive shaft and the bushing are arranged opposite to each other, and the working device is detachably installed between the drive shaft and the bushing.

[0024] In conjunction with the second aspect, the present invention provides a first possible implementation of the second aspect, wherein the working device includes: a cutter shaft and a cutting tool connected to the cutter shaft;

[0025] One end of the cutter shaft is connected to the drive shaft, and the other end is installed on the bushing.

[0026] In conjunction with the first possible implementation of the second aspect, this utility model provides a second possible implementation of the second aspect, wherein the end of the cutter shaft opposite to the transmission shaft is rotatably connected to a bearing seat, and the bearing seat is detachably inserted into the bushing.

[0027] This utility model embodiment brings the following beneficial effects: A bushing slides axially onto a fixed base, and the bushing has a first position and a second position relative to the fixed base. An axial elastic element is installed between the fixed base and the bushing, and the axial elastic element has a tendency to move the bushing from the first position to the second position. A locking element is installed on the fixed base, which can lock the bushing at the second position, thus ensuring the axial position of the bushing is stable. The bushing can be adapted to working devices such as soil loosening tools or grass rakes to ensure that the working devices are installed stably and reliably. When it is necessary to disassemble and replace the working device, simply operate the locking element to the unlocked state, and the bushing can move axially from the second position to the first position to detach from the working device, thus facilitating the disassembly and replacement of the working device.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 An exploded view of the quick-change mechanism for the working head provided in an embodiment of this utility model;

[0031] Figure 2 A schematic diagram of the locking component of the quick-change mechanism for the working head provided in an embodiment of this utility model;

[0032] Figure 3 A schematic diagram of the bushing of the quick-change mechanism for the working head provided in an embodiment of this utility model;

[0033] Figure 4 A cross-sectional view of the quick-change mechanism for the working head provided in an embodiment of the present utility model with the locking member in the unlocked state;

[0034] Figure 5 A cross-sectional view of the quick-change mechanism for the working head provided in an embodiment of the present utility model with the locking member in the locked state;

[0035] Figure 6 A schematic diagram of the garden tools provided in an embodiment of this utility model;

[0036] Figure 7 A schematic diagram of the working components of the garden tool provided in this embodiment of the utility model.

[0037] Icons: 100-Fixed seat; 101-Protrusion; 110-Base; 120-Seat cover; 200-Shaft sleeve; 201-Socket; 202-Leaning groove; 300-Axial elastic element; 400-Locking element; 410-Button; 411-Protrusion; 412-Slide groove; 420-Radial elastic element; 500-Machine body; 600-Drive shaft; 700-Working device; 710-Cut shaft; 720-Cut tool; 730-Bearing seat. Detailed Implementation

[0038] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are 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, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are only used to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] like Figure 1 and Figure 6As shown, the quick-change mechanism for the working head provided in this embodiment of the present invention includes: a fixed base 100, a bushing 200, an axial elastic member 300, and a locking member 400; the bushing 200 is slidably fitted to the fixed base 100 along its own axial direction, and the bushing 200 has a first working position and a second working position relative to the fixed base 100; the axial elastic member 300 is installed between the fixed base 100 and the bushing 200, and the axial elastic member 300 has a tendency to move the bushing 200 from the first working position to the second working position; the locking member 400 is installed on the fixed base 100, and the locking member 400 is used to lock the bushing 200 at the second working position.

[0042] Specifically, the locking element 400 moves radially within the bushing 200 to switch between the first and second working positions. The bushing 200 is adapted to the shaft end of a working device 700, such as a soil tiller or a rake. When the working device 700 needs to be installed, the locking element 400 is unlocked, the shaft end of the working device 700 is inserted into the bushing 200, and the bushing 200 is pushed axially from the second working position to the first working position until the other shaft end of the working device 700 can be fitted onto the corresponding drive shaft 600. Under the action of the axial elastic element 300, the bushing 200 returns to the second working position, thereby axially limiting the working device 700 between the bushing 200 and the drive shaft 600. Then, the locking element 400 is returned to the locked state, thus locking the bushing 200 in the second working position. This not only facilitates the disassembly and replacement of the working device 700 but also prevents the working device 700 from falling off due to loosening of the bushing 200.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment of the present invention, the bushing 200 is provided with a socket 201 and a relief groove 202 that communicates with the socket 201; when the locking member 400 is in the unlocked state, the locking member 400 passes through the socket 201 and is adapted to and opposite to the relief groove 202. At this time, the bushing 200 can slide axially from the second work position to the first work position relative to the fixed seat 100. During this process, the locking member 400 can be embedded in the relief groove 202.

[0044] See Figure 1 , Figure 3 , Figure 5 and Figure 6 When the locking member 400 is in the locked state, the locking member 400 is misaligned with the relief groove 202, and the locking member 400 can no longer be inserted into the relief groove 202. This will prevent the bushing 200 from sliding from the second station to the first station. When the axial position of the bushing 200 is locked at the second station, the bushing 200 and the drive shaft 600 can be kept at a small distance, thereby limiting the working device 700 between the bushing 200 and the drive shaft 600.

[0045] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the locking member 400 includes a button 410 and a radial elastic member 420; the button 410 is slidably fitted to the fixed base 100, the radial elastic member 420 is installed between the button 410 and the fixed base 100, and the radial elastic member 420 has a tendency to switch the button 410 from the unlocked state to the locked state.

[0046] When unlocking is required, simply press button 410 to slide it to the unlocked state. After releasing button 410, it will return to the locked state under the action of the radial elastic element 420.

[0047] Furthermore, the button 410 has a protrusion 411 that mates with the clearance groove 202; when the button 410 is in the unlocked state, the protrusion 411 and the clearance groove 202 are positioned opposite each other; when the button 410 is in the locked state, the protrusion 411 and the clearance groove 202 are misaligned. By setting the protrusion 411, the contact area between the protrusion 411 and the bushing 200 in the locked state can be increased, thereby improving the stability of the bushing 200's positioning.

[0048] Furthermore, the button 410 is provided with a groove 412, and the fixing base 100 is provided with a protrusion 101 that slides within the groove 412; the radial elastic element 420 is installed between the protrusion 101 and the button 410.

[0049] The protrusion 101 fits into the slide groove 412, and the radial elastic element 420 is located between the protrusion 101 and the button 410. This not only ensures that the button 410 and the fixed seat 100 are assembled tightly, but also enables the sliding guide of the button 410 through the cooperation of the protrusion 101 and the slide groove 412, thus preventing the button 410 from being deflected or stuck.

[0050] In an optional embodiment, the bushing 200 has at least two sockets 201 along its circumference, each socket 201 being connected to a clearance groove 202; the fixing base 100 is equipped with a plurality of locking elements 400 corresponding to the number of sockets 201. This allows the plurality of locking elements 400 to be evenly distributed along the circumference of the bushing 200, thus ensuring that all locking elements 400 exert an axial limiting effect on the bushing 200 in the locked state, further improving the stability of the bushing 200.

[0051] See Figure 1The fixed base 100 includes: a base 110 and a cover 120 connected to the base 110; a bushing 200, an axial elastic element 300, and a locking element 400 are all installed between the base 110 and the cover 120. The base 110 and the cover 120 can be detachably connected by bolts or clips, and the base 110 and the cover 120 are recessed in opposite directions to form mounting grooves. The bushing 200, the axial elastic element 300, and the locking element 400 are all installed within the mounting grooves between the base 110 and the cover 120.

[0052] like Figure 1 , Figure 6 and Figure 7 As shown, the garden tool described in this embodiment includes: a body 500, a drive shaft 600, a working device 700, and a quick-change mechanism for the working head provided in the above embodiment; the drive shaft 600 and the bushing 200 are arranged opposite to each other, and the working device 700 is detachably installed between the drive shaft 600 and the bushing 200. When the bushing 200 is locked in the second position, the working device 700 is limited between the drive shaft 600 and the bushing 200, which can ensure that the working device 700 is securely installed and reduce the risk of the working device 700 loosening or falling off during operation.

[0053] In this embodiment, the working device 700 includes a cutter shaft 710 and a cutting tool 720 connected to the cutter shaft 710; one end of the cutter shaft 710 is connected to the drive shaft 600, and the other end is mounted on the bushing 200. The end of the drive shaft 600 may be provided with a circumferential limiting part adapted to the cutter shaft 710. The circumferential limiting part may include a slot or key pin with a polygonal cross-section, etc., to limit the circumferential downward movement, so that the cutter shaft 710 can rotate synchronously with the drive shaft 600.

[0054] Furthermore, the end of the cutter shaft 710 facing away from the drive shaft 600 is rotatably connected to the bearing housing 730, which is detachably inserted into the bushing 200. The bearing housing 730 can be configured as a polygon in a cross-section perpendicular to the axial direction, and the inner hole of the bushing 200 can be fitted with the bearing housing 730, thereby securely installing the bearing housing 730 within the bushing 200. A bearing is installed between the cutter shaft 710 and the bearing housing 730 to ensure smooth rotation of the cutter shaft 710, and multiple cutters 720 spaced apart along the axial direction of the cutter shaft 710 perform operations such as loosening soil or raking grass. In addition, the multiple cutters 720 can be rotated by a certain angle along the circumference of the cutter shaft 710 and fixed, thereby forming a staggered layout, which improves the dynamic balance performance of the working device 700 during rotation.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A quick-change mechanism for working heads, characterized in that, include: Fixed seat (100), bushing (200), axial elastic element (300) and locking element (400); The bushing (200) is slidably fitted to the fixed seat (100) along its own axial direction, and the bushing (200) has a first position and a second position relative to the fixed seat (100); The axial elastic element (300) is installed between the fixed seat (100) and the bushing (200), and the axial elastic element (300) has a tendency to move the bushing (200) from the first station to the second station; The locking member (400) is mounted on the fixed base (100), and the locking member (400) is used to lock the bushing (200) at the second position.

2. The quick-change mechanism for the working head according to claim 1, characterized in that, The bushing (200) is provided with a relief groove (202); When the locking member (400) is in the unlocked state, the locking member (400) is adapted to and opposite the relief groove (202); When the locking member (400) is in the locked state, the locking member (400) is misaligned with the relief groove (202) to prevent the bushing (200) from sliding from the second station to the first station.

3. The quick-change mechanism for the working head according to claim 2, characterized in that, The locking element (400) includes: a button (410) and a radial elastic element (420); The button (410) is slidably fitted to the fixed base (100), the radial elastic member (420) is installed between the button (410) and the fixed base (100), and the radial elastic member (420) has a tendency to switch the button (410) from the unlocked state to the locked state; The bushing (200) is provided with a socket (201) that communicates with the relief groove (202). When the locking member (400) is in the unlocked state, the button (410) passes through the socket (201) and engages with the relief groove (202).

4. The quick-change mechanism for the working head according to claim 3, characterized in that, The button (410) has a protrusion (411) that is adapted to the relief groove (202). When the button (410) is in the unlocked state, the protrusion (411) is positioned opposite to the relief groove (202); When the button (410) is in the locked state, the protrusion (411) is misaligned with the relief groove (202).

5. The quick-change mechanism for the working head according to claim 3, characterized in that, The button (410) is provided with a groove (412), and the fixing base (100) is provided with a protrusion (101) that slides in the groove (412). The radial elastic element (420) is installed between the protrusion (101) and the button (410).

6. The quick-change mechanism for the working head according to any one of claims 3 to 5, characterized in that, The bushing (200) is provided with at least two of the sockets (201) in the circumferential direction, and each of the sockets (201) is connected to the relief groove (202). The mounting base (100) is equipped with a plurality of locking elements (400) corresponding to the number of the sockets (201).

7. The quick-change mechanism for the working head according to claim 1, characterized in that, The mounting base (100) includes: a base (110) and a cover (120) connected to the base (110); The bushing (200), the axial elastic element (300), and the locking element (400) are all installed between the base (110) and the seat cover (120).

8. A garden tool, characterized in that, include: The machine body (500), the drive shaft (600), the working device (700), and the quick-change mechanism for the working head as described in any one of claims 1 to 7; The drive shaft (600) is disposed opposite to the bushing (200), and the working device (700) is detachably installed between the drive shaft (600) and the bushing (200).

9. The garden tool according to claim 8, characterized in that, The working device (700) includes: a cutter shaft (710) and a cutting tool (720) connected to the cutter shaft (710). One end of the cutter shaft (710) is connected to the drive shaft (600), and the other end is installed on the bushing (200).

10. The garden tool according to claim 9, characterized in that, The end of the cutter shaft (710) opposite to the drive shaft (600) is rotatably connected to the bearing seat (730), and the bearing seat (730) is detachably inserted into the bushing (200).

Images