Rotary limiting structure and multipurpose shovel

Abstract

The utility model relates to the technical field of tools, in particular to a rotation limiting structure and a multipurpose shovel, the rotation limiting structure comprises a connecting frame and a connecting rod group, the connecting rod group comprises an outer pipe, an inner pipe and a knob, the outer pipe is movably sleeved outside the inner pipe, the knob is respectively and movably connected with the outer pipe and the inner pipe in an inserted mode, and the knob is connected with the connecting frame. The knob is also movably connected with the outer tube; a plurality of limiting grooves are sequentially formed in the connecting frame in the rotating direction of the connecting rod set, the limiting piece is movably connected with the outer pipe and the inner pipe in an inserted mode, and the limiting piece is further movably connected with the outer pipe; the connecting frame is rotationally connected with the outer pipe; when the knob is in a locked state, the limiting piece and the limiting groove are clamped and limited; and when the knob is switched from the locking state to the unlocking state, the limiting piece moves relative to the outer pipe along with the inner pipe and then is separated from the limiting groove. The rotary limiting structure is applied to the multi-purpose shovel, and the shovel can be conveniently switched among different purposes.

Description

Technical Field

[0001] The utility model relates to the technical field of tools, and more specifically to a rotation limiting structure and a multi-purpose shovel. Background Art

[0002] From the perspective of the use conditions of a multi-purpose shovel, it must be easy to carry and convenient to use. In terms of convenient use performance, the multi-purpose shovels on the market have a rotatable connection between the shovel head and the shovel handle. When using different functions of the shovel, it is necessary to rotate the shovel handle to form a certain tilt angle with the shovel head, and then fix the shovel head for use. After adjusting the relative angle between the shovel head and the shovel handle, it is necessary to fix it through a rotating fixing mechanism to maintain the position of the shovel head and the shovel handle unchanged. When the shovel needs to be switched to another function, it is necessary to first remove the fixing mechanism to disengage the shovel head or shovel handle, then adjust the relative angle between the shovel head and the shovel handle, and then install the fixing mechanism again for use. This operation is very troublesome and time-consuming, reducing work efficiency. Utility Model Content

[0003] The purpose of the utility model is to overcome the problem that it is cumbersome to switch between multiple different uses of a multi-purpose shovel, and to provide a rotation limit structure, which is applied to the multi-purpose shovel and can facilitate the angle adjustment of the shovel head and the shovel handle. Before adjusting the angle, there is no need to remove the fixing mechanism first, and after adjusting the angle, there is no need to install the fixing mechanism again for fixing. Therefore, it is convenient to switch the shovel between different uses, which is very convenient and improves work efficiency.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A rotation limit structure comprises a connecting frame and a connecting rod group, the connecting rod group comprises an outer tube, an inner tube, and a knob, the outer tube is movably sleeved outside the inner tube, the knob is movably plugged with the outer tube and the inner tube respectively, and the knob is also movably connected to the outer tube; the connecting frame is provided with a plurality of limit grooves in sequence along the rotation direction of the connecting rod group, and also comprises a limit member, the limit member is movably plugged with the outer tube and the inner tube respectively, and the limit member is also movably connected to the outer tube; the connecting frame is rotatably connected to the outer tube; when the knob is in a locked state, the limit member is engaged with the limit groove for limit; when the knob is switched from a locked state to an unlocked state, the limit member follows the movement of the inner tube relative to the outer tube and then disengages from the limit groove.

[0006] The utility model realizes that the angle between the connecting rod group and the connecting frame can be adjusted by the rotation connection between the connecting rod group and the connecting frame, and the connecting rod group and the connecting frame can be maintained and fixed after the relative angle is adjusted by the clamping limit of the limiter and the limiter groove, and the knob is used as a locking switch, and the knob is connected to the outer tube by movement and is movably plugged with the inner tube, so that the knob can drive the inner tube to move when it moves, and the inner tube can drive the limiter to move relative to the outer tube, so that the limiter is separated from the limiter groove to unlock or the limiter enters the limiter groove to lock; after unlocking, the outer tube can be rotated relative to the connecting frame to adjust the rotation angle between the connecting rod group and the connecting frame again; if the locking operation is performed, the outer tube cannot be rotated relative to the connecting frame after locking, so that the position and angle between the connecting rod assembly and the connecting frame can be maintained unchanged. The utility model can realize locking or unlocking after the connecting rod group and the connecting frame are adjusted by controlling the position of the knob, and the operation of the sliding knob is more convenient, without removing any parts, and is more convenient and trouble-free. The rotary limiting structure of the utility model is applied to a multi-purpose shovel. Specifically, the connecting frame can be installed on the shovel head, and the connecting rod assembly can be installed on the shovel handle, so that the angle of the shovel head and the shovel handle can be adjusted conveniently. There is no need to remove the fixing mechanism before adjusting the angle, and there is no need to install the fixing mechanism again for fixing after the angle is adjusted. The shovel head and the shovel handle can realize different uses of the shovel at different angles, such as digging shovel and planing shovel. Therefore, it is convenient to switch the shovel between different uses, which is very convenient and improves work efficiency.

[0007] Furthermore, the outer tube is provided with a mounting position, the knob is mounted on the mounting position, the mounting position includes an upper locking hole and an unlocking hole that are interconnected, the aperture of the upper locking hole is larger than the aperture of the unlocking hole, the outer diameter of the knob in the first direction is smaller than the aperture of the upper locking hole and larger than the aperture of the unlocking hole, the outer diameter of the knob in the second direction is smaller than the aperture of the unlocking hole, when the knob is located in the upper locking hole and cannot enter the unlocking hole, it is in a locked state; when the knob is located in the unlocking hole, it is in an unlocked state. By setting the apertures of the upper locking hole and the unlocking hole accordingly, when the knob is located in the upper locking hole, it cannot move relative to the outer tube, so it cannot drive the inner tube to move in coordination with the limiting member, thereby ensuring the locking state between the shovel head and the shovel handle; and when the knob is located in the unlocking hole, the knob moves relative to the outer tube, thereby driving the inner tube to move in coordination with the limiting member, so that the limiting member is engaged with the limiting groove or the limiting member is separated from the limiting groove, thereby enabling the connecting rod group to rotate relative to the connecting frame or the connecting rod group is locked and cannot rotate relative to the connecting frame. The locking hole and the unlocking hole are connected to each other. When locking, since the outer diameter of the knob in the first direction is smaller than the aperture of the locking hole and larger than the aperture of the unlocking hole, the knob cannot enter the unlocking hole; when unlocking, it is only necessary to rotate the knob to a certain angle in the locking hole so that the axis of the knob in the second direction is parallel to the axis of the unlocking hole. Since the outer diameter of the knob in the second direction is smaller than the aperture of the unlocking hole, the knob can be pushed at this time to enable it to enter the unlocking hole.

[0008] Furthermore, a limiting hole is provided through the outer tube, and the limiting hole is a strip-shaped structure, and the limiting member can move back and forth along the limiting hole relative to the outer tube; when the knob is located at the upper locking hole, the limiting member and the limiting groove are engaged and limited; when the knob moves from the upper locking hole to the unlocking hole, the inner tube and the limiting member can be driven to move, and the limiting member moves along the limiting hole and then disengages from the limiting groove. The limiting hole is used to limit the limiting member, and the limiting member can only move back and forth along the limiting hole relative to the outer tube, so that it can enter the limiting groove and engage with the limiting groove, or disengage from the limiting groove.

[0009] Furthermore, it also includes a rotating shaft assembly, through which the outer tube is rotatably connected to the connecting frame. The setting of the rotating shaft assembly can make the connecting rod group rotate relative to the connecting frame. Specifically, the outer tube is rotatably connected to the connecting frame through the rotating shaft assembly.

[0010] Furthermore, the rotating shaft assembly includes a coaxially arranged shaft pin and a self-locking nut, and the shaft pin is threadedly connected with the self-locking nut after passing through the connecting frame and the connecting rod group. After the shaft pin is passed through the outer tube of the connecting frame and the connecting rod group, the self-locking nut cooperates with the shaft pin to prevent the shaft pin from being separated from the connecting frame or the outer tube, so that the outer tube always maintains a rotational connection with the connecting frame.

[0011] Furthermore, it also includes a first elastic member, one end of which is connected to the limiting member, and the other end is connected to the rotating shaft assembly. Preferably, the first elastic member is a tension spring, and when the knob drives the inner tube to move, the inner tube stretches the first elastic member to generate a restoring force, and at the same time, the inner tube drives the limiting member to leave the limiting groove, at which time the connecting frame can be rotated to adjust the angle between the connecting frame and the connecting rod group; when the knob is released, the limiting member moves in the opposite direction under the action of the restoring force of the first elastic member, so that after the angle between the connecting frame and the connecting rod group is adjusted, the limiting member can automatically snap into the limiting groove for snap-on limiting.

[0012] Furthermore, the limiting groove is a strip groove with an open end, which can facilitate the engagement and disengagement of the limiting member.

[0013] The utility model also provides a multi-purpose shovel, including the above-mentioned rotation limiting structure, a shovel head with multiple functional parts, and a shovel handle, wherein the connecting frame is detachably connected to the shovel head, and the shovel handle is detachably connected to the connecting rod group. The shovel head cooperates with the shovel handle to adjust the angle to realize different functions of the shovel, and the shovel handle is convenient for users to grasp. The angle between the shovel head and the shovel handle can be adjusted through the rotation limiting structure, and can be locked after the angle between the shovel head and the shovel handle is adjusted. When the purpose of the shovel needs to be switched, the rotation limiting structure can be used for convenient conversion, saving time and trouble.

[0014] Furthermore, the shovel handle is hollow and threadedly connected to the outer tube. A first limiting portion is provided at the end of the outer tube close to the connection with the shovel handle. A button is rotatably connected to the shovel handle, a second limiting portion is provided on the button, and a second elastic member is installed at the bottom of the button. The second elastic member is detachably connected to the shovel handle. When the second elastic member is in an original state, the first limiting portion and the second limiting portion are engaged and limited. When the button is pressed to rotate it relative to the shovel handle, the second elastic member is compressed by force, and the first limiting portion is separated from the second limiting portion. When the button is released, the second elastic member applies a restoring force to the button to reset it. The outer tube is threadedly connected to the shovel handle to achieve detachability of the shovel handle, so as to facilitate storage and carrying of the shovel handle; the first limiting portion and the second limiting portion are clamped together to form an anti-loosening structure, and the button serves as a switch of the anti-loosening structure; when the button is pressed, the second elastic member is compressed to make room for the button, and the button at the end of the second elastic member swings downward, and the button at the end of the second limiting portion swings upward, so that the second limiting portion is disengaged from the first limiting portion. At this time, the outer tube and the shovel handle can be rotated relative to each other, thereby achieving the purpose of disassembling and separating the outer tube and the shovel handle.

[0015] The disassembly principle of the shovel handle: first press the button, then the end of the button located at the second limiting part swings upward and disengages from the first limiting part. Further twisting the shovel handle can separate the outer tube from the shovel handle; the installation principle of the shovel handle: twist the shovel handle relative to the outer tube, when the second limiting part of the shovel handle is close to the end of the outer tube, the end of the outer tube will push the end of the button away, thereby making the end of the second limiting part swing upward. Further twisting the shovel handle, the button is subjected to the restoring force of the second elastic member, and the second limiting part is clamped with the first limiting part. At this time, the outer tube and the shovel handle are locked, achieving the function of preventing the threaded tube from loosening.

[0016] Furthermore, the multiple functional parts include a tip guide part, a shovel groove part, and a shovel tooth part, wherein the tip guide part is arranged at the end of the shovel head, the shovel groove part is arranged at the middle of the shovel head, and the shovel tooth part is arranged at the side of the shovel head. The multiple functional parts can realize different functions of the shovel, so as to expand the use occasions of the shovel, improve the applicability, and realize multiple uses of one shovel.

[0017] The beneficial effects of the utility model are:

[0018] (1) The rotatable connection between the connecting frame and the connecting rod assembly can be used to adjust the angle of the shovel head and the shovel handle. By moving the knob relative to the outer tube, the limit member and the limit groove can be engaged or disengaged, thereby switching the shovel head and the shovel handle between unlocking and locking, making it convenient to fix the shovel head and the shovel handle after adjusting the angle, and to switch the multi-purpose shovel between different uses.

[0019] (2) The threaded connection between the outer tube and the shovel handle is used to realize the detachable shovel handle, so that the shovel handle can be disassembled, stored and carried; the first limiting part and the second limiting part are clamped together to form an anti-loosening structure to prevent the outer tube and the shovel handle from loosening and detaching during the use of the shovel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of a rotation limiting structure of the utility model in the first direction.

[0021] Figure 2 This Figure 1 A partially cutaway structural diagram.

[0022] Figure 3 yes Figure 1 A complete cutaway diagram of the structure.

[0023] Figure 4 It is an exploded structural diagram of a rotation limiting structure of the utility model.

[0024] Figure 5 It is a structural diagram of the knob of the utility model.

[0025] Figure 6It is a structural diagram of a knob in an upper locking state after a rotation limiting structure of the utility model is connected to a shovel head.

[0026] Figure 7 It is a structural diagram of a knob that switches from a locked state to an unlocked state after a rotation limiting structure is connected to a shovel head in the utility model.

[0027] Figure 8 It is a structural diagram of a knob in an unlocked state after a rotation limiting structure of the utility model is connected to a shovel head.

[0028] Fig. 9 It is a structural diagram of the utility model in which a rotation limiting structure is connected to a shovel head and is in a first use state.

[0029] Fig.10 It is a structural diagram of the utility model in which a rotation limiting structure is connected to a shovel head and is in a second use state.

[0030] Fig.11 It is a structural diagram of the utility model in which a rotation limiting structure is connected to a shovel head and is in a third use state.

[0031] Fig.12 It is a structural diagram of a multi-purpose shovel in the first direction of the utility model.

[0032] Fig.13 It is a structural diagram of a multi-purpose shovel in the second direction of the utility model.

[0033] Fig.14 The utility model is a disassembled structural diagram of a multi-purpose shovel.

[0034] Fig.15 It is a structural diagram of the utility model after the shovel handle is connected to the outer tube.

[0035] Fig.16 It is a structural diagram of the shovel handle of the utility model in a locked state.

[0036] Fig.17 It is a structural diagram of the shovel handle of the utility model in an unlocked state.

[0037] The illustrations are as follows:

[0038] 1. Connecting frame; 11. Limiting groove; 2. Connecting rod group; 21. Outer tube; 211. Locking hole; 212. Unlocking hole; 213. Limiting hole; 214. First limiting part; 22. Inner tube; 3. Knob; 4. Limiting member; 5. Rotating shaft assembly; 51. Axle pin; 52. Self-locking nut; 6. First elastic member; 71. Second limiting part; 72. Button; 73. Second elastic member; 81. Tip guide part; 82. Shovel groove part; 83. Shovel tooth part; 1001. Rotation limiting structure; 1002. Shovel head; 1003. Shovel handle; A is the first direction of the knob; B is the second direction of the knob. DETAILED DESCRIPTION

[0039] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0040] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] The technical solution of the utility model is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0042] Example 1

[0043] like Figures 1 to 11The figure shows an embodiment of a rotation limiting structure of the utility model, comprising a connecting frame 1 and a connecting rod group 2 that are rotatably connected, the connecting rod group 2 comprising an outer tube 21, an inner tube 22, and a knob 3, the outer tube 21 is movably sleeved outside the inner tube 22, the knob 3 is movably plugged with the outer tube 21 and the inner tube 22 respectively, and the knob 3 is also movably connected to the outer tube 21; a plurality of limiting grooves 11 are sequentially arranged on the connecting frame 1 along the rotation direction of the connecting rod group 2, and the connecting frame 1 also comprises a limiting member 4, the limiting member 4 is movably plugged with the outer tube 21 and the inner tube 22 respectively, and the limiting member 4 is also movably connected to the outer tube 21; the connecting frame 1 is rotatably connected to the outer tube 21; when the knob 3 is in the locked state, the limiting member 4 is engaged with the limiting groove 11 for limiting; when the knob 3 is switched from the locked state to the unlocked state, the limiting member 4 follows the movement of the inner tube 22 relative to the outer tube 21 and then disengages from the limiting groove 11.

[0044] The utility model realizes that the angle between the connecting rod group 2 and the connecting frame 1 can be adjusted by rotating the connecting rod group 2 and the connecting frame 1, and the connecting rod group 2 and the connecting frame 1 can be maintained and fixed after the relative angle is adjusted by using the clamping limit of the limit member 4 and the limit groove 11, and the knob 3 is used as a locking switch, and the knob 3 is connected to the outer tube 21 by movement and is movably plugged with the inner tube 22, so that the knob 3 can drive the inner tube 22 to move when it moves, and the inner tube 22 can drive the limit member 4 to move relative to the outer tube 21, so that the limit member 4 is disengaged from the limit groove 11 to unlock or the limit member 4 enters the limit groove 11 to lock; after unlocking, the outer tube 21 can be rotated relative to the connecting frame 1 to adjust the rotation angle between the connecting rod group 2 and the connecting frame 1 again; if the locking operation is performed, the outer tube 21 cannot be rotated relative to the connecting frame 1 after locking, so that the position and angle between the connecting rod group 2 and the connecting frame 1 can be maintained without changing. The utility model can lock or unlock the connecting rod group 2 and the connecting frame 1 after adjusting the angle by controlling the position of the knob 3, and the operation of the sliding knob 3 is relatively convenient, and no parts need to be removed, which is more convenient and saves trouble. The rotary limit structure of the utility model is applied to a multi-purpose shovel. Specifically, the connecting frame 1 can be installed on the shovel head 1002, and the connecting rod group 2 can be installed on the shovel handle 1003, which can facilitate the angle adjustment of the shovel head 1002 and the shovel handle 1003. There is no need to remove the fixing mechanism before adjusting the angle, and there is no need to install the fixing mechanism again after adjusting the angle. The shovel head 1002 and the shovel handle 1003 can realize different uses of the shovel at different angles, such as digging shovel and planing shovel, so it is convenient to switch between different uses of the shovel, which is very convenient and improves work efficiency.

[0045] Specifically, the outer tube 21 is provided with a mounting position, and the knob 3 is mounted on the mounting position. The mounting position includes an upper locking hole 211 and an unlocking hole 212 that are connected to each other. The aperture of the upper locking hole 211 is larger than the aperture of the unlocking hole 212. The knob 3 is in the first direction, that is, Figure 5The outer diameter in the A direction is smaller than the aperture of the upper locking hole 211 and larger than the aperture of the unlocking hole 212. The knob 3 is Figure 5 The outer diameter in the B direction is smaller than the aperture of the unlocking hole 212. When the knob 3 is located at the upper locking hole 211 and cannot enter the unlocking hole 212, it is in the locked state; when the knob 3 is located at the unlocking hole 212, it is in the unlocking state. By setting the apertures of the upper locking hole 211 and the unlocking hole 212 accordingly, when the knob 3 is located at the upper locking hole 211, it cannot move relative to the outer tube 21, so it cannot drive the inner tube 22 to move in coordination with the limiting member 4, thereby ensuring the locked state between the shovel head 1002 and the shovel handle 1003; and when the knob 3 is located at the unlocking hole 212, the knob 3 moves relative to the outer tube 21, thereby driving the inner tube 22 to move in coordination with the limiting member 4, so that the limiting member 4 is engaged with the limiting groove 11 or the limiting member 4 is separated from the limiting groove 11, thereby enabling the connecting rod group 2 to rotate relative to the connecting frame 1 or the connecting rod group 2 is locked and cannot rotate relative to the connecting frame 1. The upper locking hole 211 and the unlocking hole 212 are connected to each other. When locking, since the outer diameter of the knob 3 in the first direction is smaller than the aperture of the upper locking hole 211 and larger than the aperture of the unlocking hole 212, the knob 3 cannot enter the unlocking hole 212; when unlocking, it is only necessary to rotate the knob 3 to a certain angle in the upper locking hole 211 so that the axis of the knob 3 in the second direction is parallel to the axis of the unlocking hole 212. Since the outer diameter of the knob 3 in the second direction is smaller than the aperture of the unlocking hole 212, the knob 3 can be pushed at this time so that it can enter the unlocking hole 212.

[0046] Among them, the outer tube 21 is penetrated with a limiting hole 213, and the limiting hole 213 is a strip structure. The limiting member 4 can move back and forth along the limiting hole 213 relative to the outer tube 21; when the knob 3 is located at the upper locking hole 211, the limiting member 4 is engaged with the limiting groove 11 for limiting; when the knob 3 moves from the upper locking hole 211 to the unlocking hole 212, it can drive the inner tube 22 and the limiting member 4 to move, and the limiting member 4 moves along the limiting hole 213 and then disengages from the limiting groove 11. The limiting hole 213 is used to limit the limiting member 4, and the limiting member 4 can only move back and forth along the limiting hole 213 relative to the outer tube 21, so that it enters the limiting groove 11 and engages with the limiting groove 11, or disengages from the limiting groove 11.

[0047] As an improved solution of this embodiment, a rotating shaft assembly 5 is further included, and the connecting rod group 2 is rotatably connected to the connecting frame 1 through the rotating shaft assembly 5. The setting of the rotating shaft assembly 5 can make the connecting rod group 2 rotate relative to the connecting frame 1. Specifically, the outer tube 21 is rotatably connected to the connecting frame 1 through the rotating shaft assembly 5.

[0048] Furthermore, the rotating shaft assembly 5 includes a coaxially arranged shaft pin 51 and a self-locking nut 52, and the shaft pin 51 passes through the connecting frame 1 and the connecting rod group 2 and is threadedly connected with the self-locking nut 52. After the shaft pin 51 passes through the outer tube 21 of the connecting frame 1 and the connecting rod group 2, the self-locking nut 52 cooperates with the shaft pin 51 to prevent the shaft pin 51 from being separated from the connecting frame 1 or the outer tube 21, so that the outer tube 21 always maintains a rotational connection with the connecting frame 1.

[0049] As an improved solution of this embodiment, a first elastic member 6 is further included, one end of the first elastic member 6 is connected to the limiting member 4, and the other end is connected to the rotating shaft assembly 5. Preferably, the first elastic member 6 is a tension spring, when the knob 3 drives the inner tube 22 to move, the inner tube 22 stretches the first elastic member 6 to generate a restoring force, and at the same time, the inner tube 22 drives the limiting member 4 to leave the limiting groove 11, at which time the connecting frame 1 can be rotated to adjust the angle between the connecting frame 1 and the connecting rod group 2; when the knob 3 is released, the limiting member 4 moves in the opposite direction under the action of the restoring force of the first elastic member 6, so that after the angle between the connecting frame 1 and the connecting rod group 2 is adjusted, the limiting member 4 can automatically snap into the limiting groove 11 for snap-on limiting.

[0050] As an improved solution of this embodiment, the limiting groove 11 is a strip groove with an open end, which can facilitate the engagement and disengagement of the limiting member 4.

[0051] Example 2

[0052] like Figure 12 to Figure 14 The embodiment of a multi-purpose shovel of the utility model is shown, which includes the above-mentioned rotation limiting structure 1001, a shovel head 1002 with multiple functional parts, and a shovel handle 1003. The connecting frame 1 is detachably connected to the shovel head 1002, and the shovel handle 1003 is detachably connected to the connecting rod group 2. The shovel head 1002 cooperates with the shovel handle 1003 to adjust the angle to realize different functions of the shovel. The shovel handle 1003 is convenient for users to grasp. The angle between the shovel head 1002 and the shovel handle 1003 can be adjusted by the rotation limiting structure 1001, and the angle between the shovel head 1002 and the shovel handle 1003 can be locked after the adjustment. When the purpose of the shovel needs to be switched, the rotation limiting structure 1001 can be used for convenient conversion, saving time and trouble.

[0053] As an improvement of this embodiment, the multiple functional parts include a tip guide part 81, a shovel groove part 82, and a shovel tooth part 83. The tip guide part 81 is provided at the end of the shovel head 1002, the shovel groove part 82 is provided in the middle of the shovel head 1002, and the shovel tooth part 83 is provided on the side of the shovel head 1002. The multiple functional parts can realize different functions of the shovel, so as to expand the use occasions of the shovel, improve the applicability, and realize multiple uses of one shovel.

[0054] like Figures 9 to 11As shown, the shovel head 1002 and the shovel handle 1003 are connected at different angles by adjusting the angle between the outer tube 21 and the connecting frame 1 between the shovel head 1002 and the rotating limiting structure 1001, and the limiting member 4 and the limiting groove 11 are used for clamping and limiting. This can realize different uses of the shovel, such as a digging shovel and a planing shovel. Therefore, it is easy to switch the shovel between different uses, which is very convenient and improves work efficiency.

[0055] Example 3

[0056] This embodiment is another embodiment of a multi-purpose shovel. This embodiment is similar to the embodiment 1, except that Figures 15 to 17 As shown, the shovel handle 1003 is hollow, the outer tube 21 is threadedly connected to the shovel handle 1003, a first limiting portion 214 is provided at the end of the outer tube 21 close to the connection with the shovel handle 1003, a button 72 is rotatably connected to the shovel handle 1003, a second limiting portion 71 is provided on the button 72, a second elastic member 73 is provided at the bottom of the button 72, and the second elastic member 73 is detachably connected to the shovel handle 1003; when the second elastic member 73 is in the original state, the first limiting portion 214 and the second limiting portion 71 are engaged and limited; when the button 72 is pressed to rotate relative to the shovel handle 1003, the second elastic member 73 is compressed by force, and the first limiting portion 214 is separated from the second limiting portion 71, and when the button is released, the second elastic member 73 applies a restoring force to the button 72 to reset it.

[0057] The outer tube 21 is threadedly connected to the shovel handle 1003, so that the shovel handle 1003 can be disassembled, so as to facilitate the storage and carrying of the shovel handle 1003; the first limiting portion 214 is clamped with the second limiting portion 71 to form an anti-loosening structure, and the button 72 serves as a switch of the anti-loosening structure; when the button 72 is pressed, the second elastic member 73 is compressed to make room for the button 72, and the button 72 is located at the end of the second elastic member 73 and swings downward, and the button 72 is located at the end of the second limiting portion 71 and swings upward, so that the second limiting portion 71 is disengaged from the first limiting portion 214. At this time, the outer tube 21 and the shovel handle 1003 can be rotated relative to each other, so as to achieve the purpose of disassembling and separating the outer tube 21 and the shovel handle 1003.

[0058] The disassembly principle of the shovel handle 1003: first press the button 72, then the end of the button 72 located at the second limiting portion 71 swings upward and disengages from the first limiting portion 214, and the shovel handle 1003 is further screwed to separate the outer tube 21 from the shovel handle 1003; the installation principle of the shovel handle 1003: screw the shovel handle 1003 relative to the outer tube 21, when the second limiting portion 71 of the shovel handle 1003 is close to the end of the outer tube 21, the end of the outer tube 21 will push open the end of the button 72, so that the end of the second limiting portion 71 swings upward, and the shovel handle 1003 is further screwed, the button 72 is subjected to the restoring force of the second elastic member 73, and the second limiting portion 71 is engaged with the first limiting portion 214, and the outer tube 21 and the shovel handle 1003 are locked, achieving the function of preventing the threaded tube from loosening.

[0059] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A rotation limiting structure, characterized in that: The invention comprises a connecting frame (1) and a connecting rod group (2), wherein the connecting rod group (2) comprises an outer tube (21), an inner tube (22), and a knob (3), wherein the outer tube (21) is movably sleeved outside the inner tube (22), and the knob (3) is movably plugged into the outer tube (21) and the inner tube (22), respectively, and the knob (3) is also movably connected to the outer tube (21); the connecting frame (1) is provided with a plurality of limit grooves (11) in sequence along the rotation direction with the connecting rod group (2), and further comprises a limit member (4), the limiting member (4) is movably plugged with the outer tube (21) and the inner tube (22) respectively, and the limiting member (4) is also movably connected with the outer tube (21); the connecting frame (1) is rotatably connected with the outer tube (21); when the knob (3) is in a locked state, the limiting member (4) is engaged with the limiting groove (11) for limiting; when the knob (3) is switched from the locked state to the unlocked state, the limiting member (4) moves with the inner tube (22) relative to the outer tube (21) and then disengages from the limiting groove (11).

2. The rotation limiting structure according to claim 1, characterized in that: The outer tube (21) is provided with a mounting position, and the knob (3) is mounted on the mounting position, the mounting position comprising an upper locking hole (211) and an unlocking hole (212) which are connected to each other, the aperture of the upper locking hole (211) being larger than the aperture of the unlocking hole (212), the outer diameter of the knob (3) in a first direction being smaller than the aperture of the upper locking hole (211) and larger than the aperture of the unlocking hole (212), the outer diameter of the knob (3) in a second direction being smaller than the aperture of the unlocking hole (212), and when the knob (3) is located in the upper locking hole (211) and cannot enter the unlocking hole (212), it is in a locked state; when the knob (3) is located in the unlocking hole (212), it is in an unlocked state.

3. The rotation limiting structure according to claim 2, characterized in that: The outer tube (21) is provided with a limiting hole (213) which is a strip-shaped structure. The limiting member (4) can move back and forth along the limiting hole (213) relative to the outer tube (21); when the knob (3) is located at the upper locking hole (211), the limiting member (4) and the limiting groove (11) are engaged and limited; when the knob (3) moves from the upper locking hole (211) to the unlocking hole (212), the inner tube (22) and the limiting member (4) can be driven to move, and the limiting member (4) moves along the limiting hole (213) and then disengages from the limiting groove (11).

4. The rotation limiting structure according to any one of claims 1 to 3, characterized in that: It also comprises a rotating shaft assembly (5), through which the outer tube (21) is rotatably connected to the connecting frame (1).

5. The rotation limiting structure according to claim 4, characterized in that: The rotating shaft assembly (5) comprises a coaxially arranged shaft pin (51) and a self-locking nut (52); the shaft pin (51) passes through the connecting frame (1) and the connecting rod assembly (2) and is threadedly connected to the self-locking nut (52).

6. The rotation limiting structure according to claim 4, characterized in that: It also comprises a first elastic member (6), one end of which is connected to the limiting member (4) and the other end of which is connected to the rotating shaft assembly (5).

7. The rotation limiting structure according to claim 1, characterized in that: The limiting groove (11) is a strip-shaped groove with an open end.

8. A multi-purpose shovel, characterized in that: It comprises a rotation limiting structure (1001) as described in any one of claims 1 to 7, a shovel head (1002) provided with multiple functional parts, and a shovel handle (1003), wherein the connecting frame (1) is detachably connected to the shovel head (1002), and the shovel handle (1003) is detachably connected to the connecting rod group (2).

9. The multi-purpose shovel according to claim 8, characterized in that: The shovel handle (1003) is hollow and threadedly connected to the outer tube (21). A first limiting portion (214) is provided at the end of the outer tube (21) close to the end connected to the shovel handle (1003). A button (72) is rotatably connected to the shovel handle (1003). A second limiting portion (71) is provided on the button (72). A second elastic member (73) is installed at the bottom of the button (72). The second elastic member (73) is connected to the shovel handle (1003). 03) is detachably connected; when the second elastic member (73) is in the original state, the first limiting portion (214) and the second limiting portion (71) are locked and limited; when the button (72) is pressed to rotate relative to the shovel handle (1003), the second elastic member (73) is compressed by force, and the first limiting portion (214) is separated from the second limiting portion (71); when the button (72) is released, the second elastic member (73) applies a restoring force to the button (72) to reset it.

10. The multi-purpose shovel according to claim 8, characterized in that: The multiple functional parts include a tip guide part (81), a shovel groove part (82), and a shovel tooth part (83); the tip guide part (81) is arranged at the end of the shovel head (1002), the shovel groove part (82) is arranged in the middle of the shovel head (1002), and the shovel tooth part (83) is arranged on the side of the shovel head (1002).

Images