Hook assembly for power tool

Abstract

The present invention provides a hook assembly for a power tool, the power tool including a housing, the hook assembly attached to the housing of the power tool, the hook assembly including a connecting shaft having a first end and a second end opposite each other, the first end of the connecting shaft being connected to the housing of the power tool, the second end being connected to a hook member, the hook member including a handle and a hook extending from the handle, the hook member having a first position and a second position opposite the first position, the hook member being rotatable about the central axis of the connecting shaft in the second position. The hook assembly for a power tool of the present invention can conveniently suspend the power tool at a desired position, is well integrated with the power tool, flexibly and conveniently adjusts the position and direction of the suspension, and automatically adjusts the direction and position of the suspension according to the center of gravity of the power tool.

Description

Technical Field

[0001] The present invention relates to a power tool, in particular to a hook assembly for hanging the power tool. Background Art

[0002] Suspension accessories (such as hooks) are widely used in various power tools to allow the power tool to be suspended from another hook, protrusion, rod, or other similar type of object placed on a wall, workbench, or operator's belt. Patent document CN105899338A discloses a dual-axis hook assembly for a power tool. The hook assembly can be incorporated into the housing of the power tool to allow the tool to be suspended from the hook or rod when not in use. The hook assembly has a dual-axis design, allowing the hook element to be positioned close to or adjacent to the tool body, minimizing interference during use. When the tool is not in use, the hook element can extend outward from the tool body and can be oriented in multiple directions to facilitate suspension of the tool.

[0003] However, the hook assembly disclosed in the aforementioned patent document is extremely complex in structure. Its rotational direction is limited to two intersecting axes, and the angle of the hook assembly relative to the tool is limited. Furthermore, the solution disclosed in the patent can only adjust the position and orientation of the hook within a specific angular range based on the position of its notch.

[0004] Therefore, the prior art has the problem that when using the hook assembly to hang the power tool, the angle is limited and the power tool is not flexible and convenient enough. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a hook assembly for a power tool, which can flexibly adjust the angle of the hook relative to the power tool, and can automatically adjust the hanging angle under the action of the gravity of the power tool itself, thereby ensuring the safety and stability of the power tool when it is hung.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows: a hook assembly for a power tool, the power tool includes a housing, the hook assembly is attached to the housing of the power tool, the hook assembly includes a connecting shaft having a first end and a second end relative to each other, the first end of the connecting shaft is connected to the housing of the power tool, and the second end is connected to a hook member, the hook member includes a handle and a hook extending from the handle, the hook member has a first position and a second position opposite to the first position, and the hook member can rotate around the central axis of the connecting shaft when in the second position.

[0007] The first position is a position of the hook member in a closed state, and the second position is an initial position of the hook member in an open state.

[0008] According to one embodiment of the present invention, the hook member is rotatable between a first position and a second position. Preferably, a handle of the hook member is connected at one end to the second end of the connecting shaft via a pin, wherein the handle is rotatable about the pin from the first position to the second position. More preferably, the first position and the second position are symmetrical about the center of the pin.

[0009] According to another embodiment of the present invention, the hook assembly further comprises a supporting member, which substantially circumferentially surrounds the second end and has at least two limiting openings, respectively used for clamping the handle in the first position or the second position.

[0010] According to another embodiment of the present invention, the connecting shaft further includes at least one lug extending radially outward from a circumferential portion of the connecting shaft between the first end and the second end, a mounting channel and a retaining portion are reserved on the shell, the first end and the lug of the connecting shaft pass through the mounting channel and are received in the retaining portion, and an elastic component is provided between the first end and the retaining portion.

[0011] Preferably, the mounting channel is provided with at least one groove for accommodating the lug to pass through, the retaining portion has a mounting hole for accommodating the first end, and the orifice of the mounting hole is provided with an axially extending stop portion at a position corresponding to the groove.

[0012] According to a preferred embodiment of the present invention, the mounting channel defines at least one notch on an edge of one side of the interior of the housing. After the lug passes through the notch, the connecting shaft is rotated so that the lug is received in the notch. Preferably, there are multiple notches, defining multiple different angular positions of the hook member relative to the central axis of the connecting shaft, with the position of one notch corresponding to the first position of the hook member.

[0013] The present invention also provides a power tool, comprising a shell, which is connected to a hook assembly for a power tool as described in any of the preceding claims, the shell defining the center of gravity of the power tool, and the handle of the hook assembly roughly coincides with the center of gravity of the power tool when the power tool is hung.

[0014] The hook assembly for a power tool of the present invention allows for flexible and convenient suspension of the power tool at a desired location. When the hook member is in the closed first position, the hook assembly does not interfere with the use of the tool and is well integrated with the power tool. When the tool is not in use, the hook member is rotated to its initial, open position, i.e., the second position. At this point, the hook member can be flexibly and conveniently rotated about the central axis of the connecting shaft connected to the handle portion of the housing. The rotation angle is adjustable, or in other words, it can rotate to any angle within a certain range, thereby enabling flexible and convenient adjustment of the suspension angle. The direction and position of the suspension can also be automatically adjusted based on the center of gravity of the power tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The embodiments described herein can be better understood by reading the accompanying drawings in conjunction with the following detailed description. It is emphasized that the various components are not necessarily drawn to scale. In fact, for clarity of discussion, the dimensions may be arbitrarily increased or decreased. In the accompanying drawings, the same reference numerals refer to the same elements.

[0016] Figure 1 This is a schematic diagram of the working state of the hook assembly of the present invention assembled on a power tool;

[0017] Figure 2 is a perspective view of one embodiment of a hook assembly according to the present invention;

[0018] Figure 3 yes Figure 2 a cross-sectional view of the hook assembly shown;

[0019] Figure 4 yes Figure 3 A cross-sectional view of the hook assembly along line AA is shown;

[0020] Figure 5 is a schematic diagram of the hook assembly of the present invention during the process of moving from a first position to a second position;

[0021] Figure 6 is a schematic diagram of the working state of the hook assembly of the present invention when it is assembled on the power tool in the second position;

[0022] Figure 7 is a schematic diagram of a power tool equipped with the hook assembly of the present invention when being hung;

[0023] Figure 8 It is a schematic diagram of another power tool equipped with the hook assembly of the present invention when being hung. DETAILED DESCRIPTION

[0024] Below, we will refer to Figures 1 to 8 A hook assembly for a power tool according to an embodiment of the present invention is described.

[0025] According to one embodiment of the present invention, the power tool 1 is a handheld circular saw. In alternative embodiments, the hook assembly 2 of the present invention can be used in any type of power tool, hand tool or tool accessory.

[0026] Reference Figure 1 The power tool 1 includes a housing 10 having a handle portion, and the hook assembly 2 is attached to the housing 10 of the power tool 1. The position of the hook assembly 2 depends on the type of power tool, the weight distribution of the tool, the position of the handle, and other factors. Figure 1-7 In the illustrated embodiment, the hook assembly 2 is arranged at a portion of the housing 10 close to the front end of the handle 11 .

[0027] According to one embodiment of the present invention, referring to Figure 2 , Figure 3 ,and Figure 4 The housing 10 of the power tool is provided with a mounting channel 12 for accommodating and supporting the connecting shaft and a retaining portion 13 for receiving one end of the connecting shaft. The hook assembly 2 includes a connecting shaft 20 having a first end 21 and a second end 22 opposite to each other. The first end 21 of the connecting shaft is connected to the housing 10 of the power tool, and the second end 22 is connected to a hook member 24. Preferably, the connecting shaft 20 further includes at least one lug 23 extending radially outward from a circumferential portion of the connecting shaft 20 between the first end 21 and the second end 22. More preferably, the lugs 23 include two lugs 23, which are symmetrically arranged along the central axis of the connecting shaft.

[0028] like Figure 4As shown, the mounting channel 12 is provided with a groove 14 that can accommodate the lug 23 of the connecting shaft 20. Preferably, the grooves 14 are a pair of grooves 14 extending radially outward from a portion of the circumference of the mounting channel 12. The shape and size of the grooves correspond to the shape and size of the lugs, that is, the lug 23 can pass through the grooves 14. More preferably, the mounting channel 12 defines at least one notch 15 on an edge on one side of the housing interior. After the lug 23 passes through the groove 14, the connecting shaft 20 is rotated so that the lug 23 is accommodated within the notch 15. Preferably, there are multiple notches 15, which define multiple angular positions of the hook member 24 relative to the central axis of the connecting shaft 20. The position of a pair of notches 15' corresponds to the first position of the hook member 24, ensuring that the hook member 24 does not rotate arbitrarily around the axis of the connecting shaft 20 when in the first position. Preferably, the shape of the recess 15 is generally flat and not too deep. When the hook member 24 is in the second position, the lug 23 can easily slide in and out of the recess 15, overcoming the biasing force of the elastic component 17, thereby ensuring that the hook member 24 can flexibly rotate about the central axis of the connecting shaft. Preferably, there are four recesses, two of which are symmetrically arranged relative to the axis of the connecting shaft. One pair of recesses corresponds to the recess 15' for the first position of the member 24, and the other pair of recesses corresponds to the position of the maximum required rotation angle of the hook member. More preferably, the recess 15 is positioned approximately 30 to 45 degrees from the adjacent groove 14. In alternative embodiments, more recesses may be provided around the rotation axis.

[0029] The retaining portion 13 generally includes a mounting hole 16 for receiving the first end 21 of the connecting shaft, and an elastic member 17 is provided between the first end 21 and the retaining portion 13. The size and shape of the mounting hole 16 are designed to adapt to the first end 21 of the connecting shaft and are configured to allow the first end 21 to perform rotational and axial movement within the mounting hole 16. Preferably, the connecting shaft 20 also includes a head 28 with a reduced diameter extending along the axis of the first end 21. The elastic member 17 is sleeved on the head 28 and supported between the first end and the bottom of the mounting hole 16. The elastic member 17, such as a compression spring, provides a biasing force for keeping the lug 23 of the connecting shaft 20 against the recess 15. More preferably, the orifice of the mounting hole 16 is provided with an axially extending stopper 18 at a position corresponding to the groove 14. The stop portion 18 is used to prevent the lug 23 from entering the groove 14 again during the rotation of the connecting shaft, so that the lug 23 falls into the recess 15. The axially extending stop portion 18 at least partially overlaps with the lug in the axial direction of the connecting shaft and is staggered with the lug 23 in the circumferential direction of the connecting shaft after the lug 23 passes through the groove 14 and rotates the connecting shaft 20 to make the lug 23 fall into the recess 15, thereby preventing the lug 23 from entering the groove 14 again during the rotation of the connecting shaft, and ensuring that the lug 23 will not fall out of the groove 14.

[0030] According to a preferred embodiment of the present invention, the housing 10 comprises two halves, which are divided into two halves at the centerline of the handle 11. During assembly of the power tool, the two halves snap together to form the housing 10. In the present invention, the mounting channel 12 and retaining portion 13 are disposed on each of the housing halves. Thus, when the lug 23 of the connecting shaft passes through the mounting channel 12 disposed in one half and then extends into the retaining portion 13 disposed in the other half, the connecting shaft 20 is rotated, causing the lug 23 to enter the recess 15 on the end surface of the mounting channel 12 facing the other half. Then, the two halves are closed. The stopper 18 of the retaining portion in the other half, since the position of the axially extending stopper 18 corresponds to the position of the recess 14 of the mounting channel 12, blocks the axial front of the recess 14 of the mounting channel 12. An elastic member 17 disposed between the first end 21 of the connecting shaft 20 and the retaining portion 13 is axially compressed, and its biasing force retains the lug of the connecting shaft 20 in the recess 15. Furthermore, since the axially extending stopper 18 at least partially overlaps with the lug 23 in the axial direction, the stopper 18 blocks the rotation angle of the lug 23 in the circumferential direction, thereby ensuring the reliability and simplicity of mounting the hook member on the power tool.

[0031] refer to Figures 2 to 4 , the hook member 24 includes a handle 25 and a hook 26 extending from the handle. The handle 25 generally includes a straight longitudinal section, which is used to attach the hook member 24 to the second end 22 of the connecting shaft 20. Preferably, the handle 25 is connected to the second end 22 of the connecting shaft by a pin 27 at one end, wherein the handle 25 is rotatable around the pin 27. The handle 25 is generally perpendicular to the connecting shaft. The hook 26 extends from one end of the handle 25 and has a suitable hook shape for use in hanging the tool. Preferably, the hook 26 includes a section generally parallel to the axis of the connecting shaft 20 and a section generally perpendicular to the axis of the connecting shaft 20. Such a structural configuration of the hook 26 is conducive to a firm and stable hanging.

[0032] refer to Figure 1 , Figure 2 , Figure 5 and Figure 6The hook member of the present invention has a first position 41 and a second position 42 opposite the first position. The first position 41 is the position of the hook member 24 in its closed state. Specifically, the first position 41 is the position of the hook member when the power tool is not needed to suspend the power tool. For example, when the tool is in use, the user desires that the hook member minimize obstruction to the tool's use. Therefore, preferably, the first position 41 is below the front end of the handle 11, allowing the hook member to be positioned close to or adjacent to the tool body. When the hook member 24 is needed to suspend the power tool, it is moved to its second position 42. The second position 42 is the initial position of the hook member 24 in the open state. The second position 42 allows the hook member 24 to extend outward from the tool body to facilitate suspending the tool. When the hook member 24 is in the initial position in the open state, it can rotate about the central axis of the connecting shaft 20 to its final position.

[0033] According to one embodiment of the present invention, referring to Figure 1 , Figure 3 and Figure 5The hook member 24 is rotatable between a first position 41 and a second position 42. Because the handle 25 of the hook member 24 is connected to the second end 22 of the connecting shaft 20 via the pin 27, the handle 25 can rotate about the pin 27 from the first position 41 to the second position 42. More preferably, the first position 41 and the second position 42 are symmetrical about the center of the pin 27. That is, the hook member 24 rotates 180 degrees from the first position 41 to the second position 42. More preferably, the second end 22 of the connecting shaft is provided with a slot for accommodating the handle. The slot extends radially outward from the pin 27, corresponding to the first and / or second positions of the hook member. According to another embodiment of the present invention, the hook assembly further includes a support member 30 that substantially circumferentially surrounds the second end 22 of the connecting shaft 20 and has at least two retaining openings 31. The retaining openings 31 correspond to the positions of the slots and are used to clamp the handle 25 in the first and / or second positions. According to a preferred embodiment of the present invention, the support member 31 is a plastic member having a certain degree of elasticity, and the limiting opening 31 includes a portion for accommodating the handle and a slot slightly smaller than the handle. The limiting opening 31 is configured such that when the hook member 24 is in the first position, the handle 25 is confined within the opening and cannot be arbitrarily dislodged from the opening. However, when the handle 25 is rotated from the first position 41 to the second position 42, the handle can be dislodged from the limiting opening 31 corresponding to the first position 41. When the hook member 24 is rotated to the second position 42, the handle can enter the limiting opening corresponding to the second position 42 and be constrained thereby, thereby preventing the hook member 24 from undesirably rotating about the pin 27 in the first position and / or the second position.

[0034] Further references Figures 6 to 8 When the hook member 24 is rotated to the second position 42, since the connecting shaft 23 is rotatable relative to the housing, the hook member 24 can be further rotated about the central axis of the connecting shaft 20 to a desired angle. When the power tool is hung, the hook portion 26 is hung on a rod or hook. At this time, the weight of the power tool overcomes the biasing force generated by 17, causing the lug 23 of the connecting shaft 20 to slide out of the notch 15 on the end surface of the mounting channel 12. The connecting shaft 20 rotates under the weight of the tool until the direction of the handle 25 of the hook member 24 substantially coincides with the center of gravity of the power tool. At this time, the hook assembly has an optimal hanging position and direction.

[0035] The hook assembly of the present invention can be integrated into the housing of a power tool to minimize possible interference with the use of the tool. When the tool is not in use, the tool can be hung at a desired location such as another hook, protrusion, rod or other similar type of object, and automatically adjust to the installed hanging position according to the center of gravity of the tool.

[0036] The present invention further provides a power tool comprising a housing connected to a hook assembly for a power tool as claimed in any one of the preceding claims, wherein the housing defines the center of gravity of the power tool, and when the power tool is suspended, the hook member substantially coincides with the center of gravity of the power tool. Figure 7 As shown, when the power tool is equipped with a lighter battery, the center of gravity of the power tool is biased towards the middle of the tool. At this time, when the hook assembly of the present invention hangs the tool, the tool as a whole tends to be more horizontal. When the power tool is equipped with a heavier battery, as shown Figure 8 As shown, the center of gravity of the power tool shifts toward the rear of the tool due to the added weight of the battery. When the tool is suspended using the hook assembly of the present invention, the tool tilts significantly further toward the rear. The hook assembly of the present invention automatically adjusts the suspension angle and / or direction based on the center of gravity of the power tool, thereby ensuring safe, stable, and convenient tool suspension.

[0037] As mentioned above, although the exemplary embodiments of the present invention have been described in the specification with reference to the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, and many other embodiments are possible. The scope of the present invention should be limited by the claims and their equivalents.

Claims

1. A hook assembly for a power tool, the power tool comprising a housing, the hook assembly being attached to the housing of the power tool, the hook assembly comprising a connecting shaft having a first end and a second end opposite to each other, the first end of the connecting shaft being connected to the housing of the power tool, the second end being connected to a hook member, the hook member comprising a handle and a hook portion extending from the handle, wherein: The hook member has a first position in a closed state and a second position in an open state opposite to the first position. The hook member can rotate around the central axis of the connecting shaft in the second position. The handle of the hook member is connected to the second end of the connecting shaft through a pin at one end, wherein the handle can rotate from the first position to the second position around the pin, and the first position and the second position are symmetrical about the center of the pin. The hook assembly also includes a support member, which basically circumferentially surrounds the second end and has at least two limiting openings, which are used to clamp the handle in the first position and / or the second position respectively.

2. The hook assembly for a power tool according to claim 1, wherein: The hook member is rotatable between a first position and a second position.

3. The hook assembly for a power tool according to claim 1 or 2, characterized in that: The connecting shaft further includes at least one lug extending radially outward from a circumferential portion of the connecting shaft between the first end and the second end. The housing includes a mounting channel and a retaining portion. The first end of the connecting shaft and the lug pass through the mounting channel. The first end of the connecting shaft is received in the retaining portion. An elastic component is provided between the first end and the retaining portion.

4. The hook assembly for a power tool according to claim 3, wherein: The mounting channel is provided with at least one groove for accommodating the lug to pass through, and the retaining portion has a mounting hole for accommodating the first end. The orifice of the mounting hole is provided with an axially extending stopper at a position corresponding to the groove.

5. The hook assembly for a power tool according to claim 4, characterized in that: There are two lugs, which are symmetrical along the central axis of the connecting shaft. There are also two grooves, whose shapes and positions correspond to those of the lugs.

6. The hook assembly for a power tool according to claim 5, characterized in that: The edge of the installation channel on one side inside the shell is defined with at least one notch. After the lug passes through the notch, the connecting shaft is rotated so that the lug is received in the notch.

7. The hook assembly for a power tool according to claim 6, wherein: There are a plurality of notches defining a plurality of different angular positions of the hook member relative to the central axis of the connecting shaft, wherein the position of one notch corresponds to the first position of the hook member.

8. A power tool comprising a housing, characterized in that: The housing is connected to the hook assembly for a power tool according to any one of claims 1 to 7 , the housing defines the center of gravity of the power tool, and the handle of the hook member substantially coincides with the center of gravity of the power tool when the power tool is hung.

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