Power tool

Abstract

This application relates to a power tool, including a gearbox, an oil baffle, a motor assembly, an output shaft, and a transmission assembly. The gearbox defines a cavity. The oil baffle is disposed within the cavity and divides the cavity into a first cavity and a second cavity. The motor assembly includes a motor shaft, at least a portion of which is located within the first cavity. The output shaft is at least partially located within the first cavity. The transmission assembly is disposed within the first cavity and is drively connected between the motor shaft and the output shaft. By using the oil baffle to divide the cavity into a first cavity and a second cavity, the volume of the first cavity is compressed relative to the total volume of the cavity, allowing for more thorough contact between the lubricating oil added to the first cavity and the transmission assembly, thereby reducing vibration during operation of the power tool.

Description

Technical Field

[0001] This application relates to the field of transmission component technology, and more specifically, to power tools. Background Technology

[0002] Currently, most power tools on the market contain lubricating oil inside the housing of the transmission components to provide lubrication during operation. However, insufficient contact between the lubricating oil and the power tool results in significant vibration and can easily cause user fatigue. Utility Model Content

[0003] This application provides power tools to address the problem of how to reduce the vibration of power tools, thereby alleviating user fatigue.

[0004] Embodiments of this application provide a power tool, including a gearbox, an oil baffle, a motor assembly, an output shaft, and a transmission assembly. The gearbox defines a cavity. The oil baffle is disposed within the cavity and divides the cavity into a first cavity and a second cavity. The motor assembly includes a motor shaft, at least a portion of which is located within the first cavity. The output shaft is at least partially located within the first cavity. The transmission assembly is disposed within the first cavity and is drively connected between the motor shaft and the output shaft.

[0005] The aforementioned power tool, by setting an oil baffle to divide the cavity into a first cavity and a second cavity, compresses the volume of the first cavity relative to the volume of the main cavity. When lubricating oil is added to the first cavity during use, the lubricating oil added to the first cavity can make more sufficient contact with the transmission components, and can reduce the amount of lubricating oil wasted when the transmission components are working, thereby improving the lubrication effect on the transmission components, reducing the vibration of the power tool during operation, and reducing user fatigue.

[0006] In one embodiment, the dimension of the first cavity along the axial direction of the motor shaft is greater than the dimension of the second cavity along the axial direction of the motor shaft; and / or, the dimension of the first cavity along the direction perpendicular to the motor shaft is greater than the dimension of the second cavity along the direction perpendicular to the motor shaft.

[0007] In one embodiment, the axial direction of the motor shaft intersects the axial direction of the output shaft. The oil baffle includes a first oil baffle and a second oil baffle. The first oil baffle is spaced apart from the cavity wall of the cavity along the axial direction of the motor shaft to define a first sub-cavity between the first oil baffle and the cavity wall. One end of the second oil baffle is connected to one end of the first oil baffle, and the second oil baffle is spaced apart from the cavity wall of the cavity along the axial direction of the output shaft to define a second sub-cavity between the second oil baffle and the cavity wall. The first sub-cavity and the second sub-cavity communicate to form a first cavity. The second cavity is defined between the side of the first oil baffle away from the first sub-cavity and the side of the second oil baffle away from the second sub-cavity and the cavity wall of the cavity.

[0008] In one embodiment, a second baffle plate is provided between the second cavity and the second sub-cavity, and the second baffle plate is provided with a through hole for the output shaft to pass through; and / or, a first baffle plate is provided between the second cavity and the first sub-cavity.

[0009] In one embodiment, the oil baffle further includes a reinforcing plate. One side of the reinforcing plate is connected to the first oil baffle plate. The other side of the reinforcing plate is connected to the second oil baffle plate.

[0010] In one embodiment, the transmission assembly includes a first bevel gear and a second bevel gear. The first bevel gear is disposed in a first sub-cavity and sleeved on the outside of the motor shaft. The second bevel gear is disposed in a second sub-cavity, sleeved on the outside of the output shaft, and meshes with the first bevel gear.

[0011] In one embodiment, a limiting portion protrudes from the outer peripheral wall of the output shaft, and the limiting portion is located within the first cavity. Along the axial direction of the output shaft, an oil baffle is positioned on the side of the limiting portion near the second cavity.

[0012] In one embodiment, the oil baffle has two protrusions. Two protrusions are formed at each end of the oil baffle along a direction perpendicular to the axis of the output shaft, and the protrusions are inserted into the gearbox.

[0013] In one embodiment, the gearbox has a slot that communicates with the cavity, the slot extends axially along the output shaft, and one end of the slot along the axial direction of the output shaft has an opening to allow the protrusion to be inserted into the slot through the opening.

[0014] In one embodiment, the gearbox has an opening communicating with a cavity. The power tool also includes a housing assembly for receiving the gearbox, the housing assembly covering the opening. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of a power tool provided in one embodiment of this application.

[0017] Figure 2 for Figure 1 A partial structural schematic diagram of the power tool in the illustrated embodiment.

[0018] Figure 3 for Figure 1 An exploded view of a portion of the structure of the power tool in the illustrated embodiment.

[0019] Figure 4 for Figure 1 A partial cross-sectional view of the power tool in the illustrated embodiment.

[0020] Figure 5 for Figure 1 A partial structural schematic diagram of the power tool in the illustrated embodiment.

[0021] Figure 6 for Figure 1 A perspective view of the oil baffle in the illustrated embodiment.

[0022] Figure 7 for Figure 1 A partial structural schematic diagram of the gearbox in the illustrated embodiment.

[0023] Explanation of key component symbols:

[0024] Power tools 100

[0025] Housing assembly 10

[0026] Motor assembly 20

[0027] Motor shaft 21

[0028] Transmission assembly 30

[0029] First bevel gear 31

[0030] Second bevel gear 32

[0031] Output shaft 40

[0032] Limiting part 41

[0033] Working Components 50

[0034] Guide plate 51

[0035] Chain 52

[0036] sprocket 60

[0037] Connecting rod 70

[0038] Gearbox 80

[0039] Cavity 80a

[0040] First cavity 80b

[0041] First subcavity 80b1

[0042] Second subcavity 80b2

[0043] Second cavity 80c

[0044] Card slot 80e

[0045] Opening 80f

[0046] 80g (open)

[0047] Oil baffle 90

[0048] First oil baffle 91

[0049] Protrusion 911

[0050] Second oil baffle 92

[0051] Through hole 92a

[0052] Reinforcing plate 93

[0053] Axial direction X of motor shaft

[0054] Axial Y-axis of the output shaft

[0055] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0056] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0057] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0060] Figure 1 This is a perspective view of a power tool 100 provided in one embodiment of this application; Figure 2 for Figure 1 A partial structural schematic diagram of the power tool 100 in the illustrated embodiment; Figure 3 for Figure 1 An exploded view of a portion of the structure of the power tool 100 in the illustrated embodiment; Figure 4 for Figure 1 A partial cross-sectional view of the power tool 100 in the illustrated embodiment.

[0061] See Figures 1 to 3 This embodiment provides a power tool 100, including a housing assembly 10, a motor assembly 20, and a transmission assembly 30 (see...). Figure 4 The power tool 100 is connected to a motor assembly 20 and an output shaft 40, which is connected to a working component 50 to perform the working function of the power tool 100. The transmission component 30 is connected between the motor assembly 20 and the output shaft 40.

[0062] In use, the driving force output by the motor assembly 20 is transmitted to the output shaft 40 via the transmission assembly 30, thereby driving the output shaft 40 to drive the working assembly 50. This power tool 100 can be an electric screwdriver, grinder, electric saw, etc. In this embodiment, an electric chainsaw is used as an example, where the electric chainsaw can be a long-handled chainsaw, such as a peg saw.

[0063] In some embodiments, such as Figure 2 As shown, the working assembly 50 includes a guide plate 51 and a chain 52 wound around the guide plate 51, as... Figure 6 As shown, the power tool 100 also includes a sprocket 60, which is fixed to the end of the output shaft 40 and engages with the chain 52. The motor assembly 20 drives the chain 52 to cut the target part (not shown). The power tool 100 also includes a connecting rod 70, with the working component 50 located at one end of the connecting rod 70. Thus, the chain 52 is guided by the guide plate 51, maintaining a stable position and trajectory during cutting, while the motor provides power for the chain 52's cutting. The connecting rod 70 allows for remote or high-altitude operations, for example, it can be used for vegetation treatment in high-altitude, dangerous, or difficult-to-reach areas. In this embodiment, the target part can be high-altitude branches, tree canopies, vines, etc.

[0064] Figure 5 for Figure 1 A partial structural schematic diagram of the power tool 100 in the illustrated embodiment; Figure 6 for Figure 1 A perspective view of the oil baffle 90 in the illustrated embodiment.

[0065] See Figures 4 to 6The power tool 100 provided in this embodiment includes a gearbox 80, an oil baffle 90, a motor assembly 20, an output shaft 40, and a transmission assembly 30. The gearbox 80 defines a cavity 80a. The oil baffle 90 is disposed within the cavity 80a and divides the cavity 80a into a first cavity 80b and a second cavity 80c. The motor assembly 20 includes a motor shaft 21, at least a portion of which is located within the first cavity 80b. The output shaft 40 is at least partially located within the first cavity 80b. The transmission assembly 30 is disposed within the first cavity 80b and is drively connected between the motor shaft 21 and the output shaft 40.

[0066] The aforementioned power tool 100, by setting an oil baffle 90, divides the cavity 80a into a first cavity 80b and a second cavity 80c, so that the volume of the first cavity 80b is compressed relative to the volume of the cavity 80a. When lubricating oil is added to the first cavity 80b during use, the lubricating oil added to the first cavity 80b can have more sufficient contact with the transmission component 30, and can reduce the lubricating oil wasted by the transmission component 30 during operation, thereby improving the lubrication effect on the transmission component 30, reducing the vibration and noise of the power tool 100 during operation, reducing user fatigue, and increasing the life of the transmission component 30.

[0067] In some embodiments, such as Figure 4 As shown, the dimension of the first cavity 80b along the axial direction X of the motor shaft 21 is larger than the dimension of the second cavity 80c along the axial direction X of the motor shaft 21. This helps to reduce the volume of the second cavity 80c, thereby making the arrangement inside the gearbox 80 more compact and saving space.

[0068] In some embodiments, such as Figure 4 As shown, the dimension of the first cavity 80b along the direction perpendicular to the axis of the motor shaft 21 is larger than the dimension of the second cavity 80c along the direction perpendicular to the axis of the motor shaft 21. This helps to reduce the volume of the second cavity 80c, making the arrangement inside the gearbox 80 more compact and thus reducing the overall volume of the gearbox 80.

[0069] In some embodiments, such as Figure 4 As shown, the axial direction X of the motor shaft 21 intersects the axial direction Y of the output shaft 40. (Combined with...) Figure 5 and Figure 6As shown, the oil baffle 90 includes a first oil baffle plate 91 and a second oil baffle plate 92. The first oil baffle plate 91 is spaced apart from the cavity wall of the cavity 80a along the axial direction X of the motor shaft 21 to define a first sub-cavity 80b1 between the first oil baffle plate 91 and the cavity wall. One end of the second oil baffle plate 92 is connected to one end of the first oil baffle plate 91, and the second oil baffle plate 92 is spaced apart from the cavity wall of the cavity 80a along the axial direction Y of the output shaft 40 to define a second sub-cavity 80b2 between the second oil baffle plate 92 and the cavity wall. The first sub-cavity 80b1 and the second sub-cavity 80b2 communicate to form a first cavity 80b. A second cavity 80c is defined between the side of the first oil baffle plate 91 away from the first sub-cavity 80b1 and the side of the second oil baffle plate 92 away from the second sub-cavity 80b2 and the cavity wall of the cavity 80a. This design facilitates the installation of the portion connecting the transmission assembly 30 to the motor shaft 21 via the first sub-cavity 80b1, and the portion connecting the transmission assembly 30 to the output shaft 40 via the second sub-cavity 80b2, resulting in a more rational layout of the first cavity 80b and thus more effectively reducing its volume. Furthermore, it simplifies the structure of the oil baffle 90, making it easier to manufacture. Optionally, the axial direction X of the motor shaft 21 is perpendicular to the axial direction Y of the output shaft 40.

[0070] In some embodiments, combined with Figure 4 and Figure 6 As shown, the second oil baffle 92 seals the space between the second cavity 80c and the second sub-cavity 80b2, and the second oil baffle 92 has a through hole 92a through which the output shaft 40 passes. This creates a seal on the side of the second sub-cavity 80b2 closest to the second cavity 80c, further improving the lubrication effect on the transmission assembly 30. Optionally, the output shaft 40 is clearance-fitted with the through hole 92a to reduce the amount of lubricating oil flowing into the second cavity 80c from the through hole 92a. The outer edge of the portion of the first oil baffle 90 that mates with the gearbox 80 is constructed in an arc shape.

[0071] In some embodiments, combined with Figure 4 and Figure 6 As shown, the first oil baffle 91 seals between the second cavity 80c and the first sub-cavity 80b1. In this way, the side of the first sub-cavity 80b1 closest to the second cavity 80c is sealed, further improving the lubrication effect on the transmission assembly 30.

[0072] In some embodiments, such as Figure 6 As shown, the oil baffle 90 also includes a reinforcing plate 93. One side of the reinforcing plate 93 is connected to the first oil baffle 91, and the other side of the reinforcing plate 93 is connected to the second oil baffle 92, thereby improving the structural reliability of the oil baffle 90. Optionally, there are multiple reinforcing plates 93, which are spaced apart along the axial direction X perpendicular to the motor shaft 21 and the axial direction Y perpendicular to the output shaft 40. In this embodiment, there are two reinforcing plates 93, which are located on both sides of the through hole 92a.

[0073] In some embodiments, combined with Figure 4 and Figure 5 As shown, the transmission assembly 30 includes a first bevel gear 31 and a second bevel gear 32. The first bevel gear 31 is located in the first sub-cavity 80b1 and is sleeved on the outside of the motor shaft 21. The second bevel gear 32 is located in the second sub-cavity 80b2, is sleeved on the outside of the output shaft 40, and meshes with the first bevel gear 31. In this way, the first bevel gear 31 and the second bevel gear 32 achieve power direction conversion, torque amplification, and precise transmission within a compact space.

[0074] In some embodiments, such as Figure 3 and Figure 4 As shown, a limiting part 41 protrudes from the outer peripheral wall of the output shaft 40, and the limiting part 41 is located inside the first cavity 80b. Along the axial direction Y of the output shaft 40, the oil baffle 90 is limited to the side of the limiting part 41 near the second cavity 80c. In this way, the output shaft 40 is axially limited by its own structure, which helps to reduce the number of parts and save space.

[0075] In some embodiments, such as Figure 5 and Figure 6 As shown, the oil baffle 90 has two protrusions 911. Two protrusions 911 are formed at each end of the oil baffle 90 along a direction perpendicular to the axis of the output shaft 40, and the protrusions 911 are inserted into the gearbox 80. Thus, the oil baffle 90 is fixed relative to the gearbox 80 in a direction perpendicular to the axis of the output shaft 40 through its own structure, which helps reduce the number of parts and save space. Optionally, the first oil baffle 91 protrudes from the second oil baffle 92 on both sides along the axial direction X perpendicular to the motor shaft 21 and the axial direction Y perpendicular to the output shaft 40, forming protrusions 911.

[0076] Figure 7 for Figure 1 A partial structural schematic diagram of the gearbox 80 in the illustrated embodiment.

[0077] In some embodiments, such as Figure 7 As shown, the gearbox 80 has a slot 80e inside, which communicates with the cavity 80a. The slot 80e extends along the axial direction Y of the output shaft 40, and is engaged with... Figure 5 As shown, the slot 80e has an opening 80f at one end along the axial direction Y of the output shaft 40, allowing the protrusion 911 to be inserted into the slot 80e through the opening 80f. This facilitates the installation and removal of the oil baffle 90.

[0078] In some embodiments, such as Figure 5 As shown, the gearbox 80 has an opening 80g that communicates with the cavity 80a. (Combined with...) Figure 4As shown, the power tool 100 also includes a housing assembly 10 for accommodating the gearbox 80, the housing assembly 10 covering the opening 80g. Thus, by providing the opening 80g, it is convenient to add lubricating oil into the first cavity 80b and to facilitate other maintenance of the transmission assembly 30, such as to facilitate observation of the wear condition of the transmission assembly 30 or cleaning of internal debris. By providing the housing assembly 10 covering the opening 80g, it is convenient for the housing assembly 10 to be docked and positioned with the gearbox 80.

[0079] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. A power tool characterized by comprising: include: Gearbox, with a defined cavity; An oil baffle is disposed within the cavity, dividing the cavity into a first cavity and a second cavity; A motor assembly, including a motor shaft, at least a portion of which is located within the first cavity; The output shaft is at least partially located within the first cavity; A transmission assembly is disposed within the first cavity, and the transmission assembly is drivingly connected between the motor shaft and the output shaft.

2. The power tool of claim 1, wherein: The dimension of the first cavity along the axial direction of the motor shaft is greater than the dimension of the second cavity along the axial direction of the motor shaft; And / or, The dimension of the first cavity along the axis perpendicular to the motor shaft is greater than the dimension of the second cavity along the axis perpendicular to the motor shaft.

3. The power tool according to claim 2, characterized in that: The axial direction of the motor shaft intersects with the axial direction of the output shaft; The oil baffle includes a first oil baffle plate and a second oil baffle plate; The first oil baffle is spaced apart from the cavity wall of the cavity along the axial direction of the motor shaft to define a first sub-cavity between the first oil baffle and the cavity wall; One end of the second oil baffle is connected to one end of the first oil baffle, and the second oil baffle is spaced apart from the cavity wall of the cavity along the axial direction of the output shaft, so as to define a second sub-cavity between the second oil baffle and the cavity wall; The first sub-cavity is connected to the second sub-cavity and forms the first cavity; The second cavity is defined between the side of the first oil baffle away from the first sub-cavity and the side of the second oil baffle away from the second sub-cavity and the cavity wall of the cavity.

4. The power tool according to claim 3, characterized in that: The second oil baffle is located between the second cavity and the second sub-cavity, and the second oil baffle is provided with a through hole for the output shaft to pass through; And / or, The first oil baffle is located between the second cavity and the first sub-cavity.

5. The power tool according to claim 3, characterized in that: The oil baffle also includes a reinforcing plate; One side of the reinforcing plate is connected to the first oil baffle plate; The other side of the reinforcing plate is connected to the second oil baffle.

6. The power tool according to claim 3, characterized in that: The transmission assembly includes a first bevel gear and a second bevel gear; The first bevel gear is located in the first sub-cavity and is sleeved on the outside of the motor shaft; The second bevel gear is located in the second sub-cavity, and the second bevel gear is sleeved outside the output shaft and meshes with the first bevel gear.

7. The power tool according to claim 1, characterized in that: The outer peripheral wall of the output shaft is provided with a limiting part, which is located in the first cavity; Along the axial direction of the output shaft, the oil baffle is positioned on the side of the limiting portion near the second cavity.

8. The power tool according to claim 1, characterized in that: The oil baffle is provided with two protruding parts. The oil baffle has two protrusions at each end along a direction perpendicular to the axis of the output shaft, and the protrusions are inserted into the gearbox.

9. The power tool according to claim 8, characterized in that: The gearbox is provided with a slot that communicates with the cavity. The slot extends along the axial direction of the output shaft, and one end of the slot along the axial direction of the output shaft has an opening to allow the protrusion to be inserted into the slot through the opening.

10. The power tool according to claim 1, characterized in that: The gearbox is provided with an opening that communicates with the cavity; The power tool also includes a housing assembly for accommodating the gearbox, the housing assembly covering the opening.

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