Angular impact screwdriver

Abstract

This application discloses an angular impact screwdriver, which includes a motor having a motor shaft that rotates about a motor axis; an output mechanism including an output shaft that rotates about a first axis, the output shaft being driven by the motor and the first axis intersecting the motor axis; a transmission mechanism for connecting the motor and the output mechanism; and a switch for user operation to trigger the motor to start; the total length of the operable area of ​​the switch and the projection of the motor shaft in the direction of the motor axis is L1; and the overlap length of the projection of the operable area of ​​the switch and the motor shaft in the direction of the motor axis is L2; ​​wherein the ratio of L2 to L1 is greater than or equal to 50%. This application is convenient for user operation and use.

Description

Technical Field

[0001] This application relates to a power tool, specifically an angular impact screwdriver. Background Technology

[0002] Handheld power tools play a vital role in daily production and life. These tools include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, and angle grinders. Electric drills and impact drills can be fitted with drill bits of different diameters to drill holes in objects; impact wrenches are used to tighten bolts and nuts; impact screwdrivers are typically used to loosen or tighten screws; and angle grinders can be used for grinding and cutting. Using handheld power tools can improve work efficiency and reduce labor intensity.

[0003] Among them, angular impact screwdrivers are a type of power tool that uses an oblique impact mechanism to transmit power at an angle to the motor axis. By combining rotational torque with oblique impact force, a spiral resistance-breaking effect is created. In existing technologies, the switch arrangement for controlling angular impact screwdrivers is inconvenient for users, and the screwdrivers are also quite long, making them inconvenient to use.

[0004] This section provides background information related to this application, which is not necessarily prior art. Utility Model Content

[0005] One objective of this application is to solve or at least alleviate some or all of the aforementioned problems, thereby facilitating user operation and use.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] An angular impact screwdriver includes: a motor having a motor shaft that rotates about a motor axis; an output mechanism including an output shaft that rotates about a first axis, the output shaft being driven by the motor and the first axis intersecting the motor axis; a transmission mechanism for connecting the motor and the output mechanism; and a switch for user operation to trigger the motor to start; the total length of the operable area of ​​the switch and the projection of the motor shaft in the direction of the motor axis is L1; and the overlap length of the projection of the operable area of ​​the switch and the motor shaft in the direction of the motor axis is L2; ​​wherein the ratio of L2 to L1 is greater than or equal to 50%.

[0008] In some embodiments, the total projected length of the switch and the motor shaft in the direction of the motor axis is L3; and the projected overlap length of the switch and the motor shaft in the direction of the motor axis is L4, wherein the ratio of L4 to L3 is greater than or equal to 59%.

[0009] An angular impact screwdriver includes: a motor having a motor shaft that rotates about a motor axis; an output mechanism including an output shaft that rotates about a first axis, the output shaft being driven by the motor and the first axis intersecting the motor axis; a transmission mechanism for connecting the motor and the output mechanism; and a switch for user operation to trigger the motor to start; in the direction of the motor axis, the distance from the front end of the operable area of ​​the switch to the first axis is L5; the distance from the motor bearing of the motor shaft to the first axis is L; wherein the sum of L5 and L is less than or equal to 100 mm.

[0010] In some embodiments, the distance L from the motor bearing to the first axis is less than or equal to 60 mm.

[0011] In some embodiments, a housing is also included, the housing including a head housing for supporting the output mechanism.

[0012] In some embodiments, the width W1 of the head shell is less than or equal to 45 mm.

[0013] In some embodiments, the output mechanism further includes an impact assembly, which includes a main shaft and an impact block. The impact block is sleeved on the main shaft, which is driven by a motor to drive the output shaft.

[0014] In some embodiments, the transmission mechanism includes a reversing assembly and a transmission shaft. The reversing assembly includes a first bevel gear and a second bevel gear that mesh with each other. The first bevel gear is fixedly sleeved on the transmission shaft, and the second bevel gear is fixedly sleeved on the main shaft.

[0015] In some embodiments, the meshing tooth surface of the second bevel gear faces upward.

[0016] In some embodiments, the motor is a brushless motor.

[0017] The advantages of this application are:

[0018] This application provides an angular impact screwdriver where a motor drives the output shaft of an output mechanism to rotate, achieving power output. A switch is used to control the motor's start. The total length of the switch's operable area and the projection of the motor shaft along the motor axis is L1, and the overlap length of their projections along the motor axis is L2. The ratio of L2 to L1 is greater than or equal to 50%. This design ensures that the projection of most of the switch's operable area along the motor axis coincides with the motor shaft, facilitating operation while holding the angular impact screwdriver. Furthermore, this structure shortens the length of the angular impact screwdriver, improving its compactness and making it easier for users to carry and use in confined spaces. Attached Figure Description

[0019] Figure 1This is a schematic diagram of one embodiment of this application;

[0020] Figure 2 This is a front view of one embodiment of this application;

[0021] Figure 3 This is a schematic diagram of removing the battery pack in one embodiment of this application;

[0022] Figure 4 This is a schematic diagram from another perspective of one embodiment of this application;

[0023] Figure 5 This is an exploded view of one embodiment of this application;

[0024] Figure 6 This is a schematic diagram from another perspective in one embodiment of this application;

[0025] Figure 7 This is a cross-sectional view of one embodiment of this application;

[0026] Figure 8 This is an internal structure diagram of one embodiment of this application;

[0027] Figure 9 This is a schematic diagram of the locking device in a locked state in one embodiment of this application;

[0028] Figure 10 This is a front view of the locking device in a locked state in one embodiment of this application;

[0029] Figure 11 This is a cross-sectional view of the locking device in a locked state in one embodiment of this application;

[0030] Figure 12 This is a schematic diagram of the locking device in an unlocked state in one embodiment of this application;

[0031] Figure 13 This is a front view of the locking device in an unlocked state in one embodiment of this application;

[0032] Figure 14 This is a cross-sectional view of the locking device in an unlocked state in one embodiment of this application;

[0033] Figure 15 This is a schematic diagram of another locking device in a locked state in one embodiment of this application;

[0034] Figure 16 This is a front view of another locking device in a locked state in one embodiment of this application;

[0035] Figure 17This is a cross-sectional view of another locking device in a locked state in one embodiment of this application;

[0036] Figure 18 This is a schematic diagram of another locking device in an unlocked state in one embodiment of this application;

[0037] Figure 19 This is a front view of another locking device in an unlocked state in one embodiment of this application;

[0038] Figure 20 This is a cross-sectional view of another locking device in an unlocked state in one embodiment of this application;

[0039] Figure 21 This is a schematic diagram showing that the switch body is not triggered in one embodiment of this application;

[0040] Figure 22 This is a schematic diagram of the switch body being triggered in one embodiment of this application.

[0041] In the picture:

[0042] 100. Angular impact tool; 200. Tool head; 201. Arc-shaped annular groove; 1. Motor; 11. Motor shaft; 111. Motor axis; 12. Motor bearing; 2. Output mechanism; 21. Output shaft; 211. First axis; 22. Impact assembly; 221. Spindle; 222. Impact block; 3. Transmission mechanism; 31. Transmission shaft; 32. Directional change assembly; 321. First bevel gear; 322. Second bevel gear; 33. Speed ​​change assembly; 4. Housing; 41. Head housing; 42. First housing; 43. Second housing; 431. Grip; 44. Air inlet; 45. Air outlet; 5. Battery pack; 6. Locking device; 61. Locking element; 62. Elastic element; 63. Sleeve; 64. Return spring; 7. Switch; 71. Operable area; 8. PCB board; 9. Trigger control assembly; 91. Switch body; 92. Trigger linkage. Detailed Implementation

[0043] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0044] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0045] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0046] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0047] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0048] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0049] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0050] Handheld power tools play a vital role in daily production and life. These include, but are not limited to, electric drills, impact drills, impact wrenches, impact screwdrivers, and angle grinders. Electric drills and impact drills can be equipped with drill bits of different diameters to drill holes in objects. Impact wrenches are used to tighten bolts and nuts, impact screwdrivers are typically used to loosen or tighten screws, and angle grinders can be used for grinding and cutting. Using handheld power tools can improve work efficiency and reduce labor intensity. Among these, angular impact tools are a type of power tool that uses an oblique impact mechanism to transmit power at an angle to the motor axis. By combining rotational torque with oblique impact force, a spiral resistance-breaking effect is created.

[0051] When using angular impact tools, in order to adapt to situations requiring confined space and reduce the difficulty of the operation, such as... Figures 1-22 As shown, this application provides an angular impact tool. The angular impact tool includes a motor 1, an output mechanism 2, a transmission mechanism 3, and a housing 4. The angular impact tool can be an angular impact screwdriver 100.

[0052] like Figure 2 , Figure 5 and Figure 7As shown, the motor 1 has a motor shaft 11 that rotates about a motor axis 111, and the motor shaft 11 is supported by a motor bearing 12. The output mechanism 2 includes an output shaft 21 that rotates about a first axis 211, the output shaft 21 being driven by the motor 1, and the first axis 211 intersecting the motor axis 111. A transmission mechanism 3 connects the motor 1 and the output mechanism 2. The housing 4 includes a head housing 41 that supports the output mechanism 2. In the direction of the first axis 211, the height H1 of the head housing 41 is less than or equal to 70 mm. In the direction of the motor axis 111, the distance L from the first axis 211 to the motor bearing 12 is less than or equal to 60 mm. In some embodiments, the height H1 of the head housing 41 can be 65 mm, 64 mm, 63 mm, 62 mm, or 61 mm. The distance L from the first axis 211 to the motor bearing 12 can be 59 mm, 58 mm, 57 mm, 56 mm, 55 mm, or 54 mm.

[0053] The above design makes the head structure of the angular impact tool compact, thus meeting the requirements for use in confined spaces and improving the difficulty of working in such spaces. Moreover, since the transmission and output structures are mainly concentrated in the head housing 41, and the distance from the first axis 211 to the motor bearing 12 is short, the center of gravity of the whole machine is close to the head, which allows for the application of a larger angular impact force during operation, thereby ensuring work efficiency.

[0054] like Figure 2 As shown, in some embodiments, the height H1 of the head housing 41 is less than or equal to 60 mm. Exemplarily, the height H1 of the head housing 41 can be 60 mm, 59 mm, 58 mm, 57 mm, 56 mm, or 55 mm, without further limitation. By further limiting the height of the head housing 41, the space occupied by the head housing 41 in the direction of the first axis 211 can be further reduced, thereby further improving the compactness of the head structure of the angular impact tool. When disassembling and assembling stage trusses, the shortest commonly used open sleeve 63 is 65 mm. After the open sleeve 63 is installed on the output shaft 21 of the angular impact tool, the distance from the end of the open sleeve 63 to the top of the head housing 41 along the direction of the first axis 211 is short, thus well meeting the requirements for disassembling and assembling stage trusses. For furniture assembly, the narrowest width of a typical washbasin is 110 mm, the screw length used during installation is 10 mm-15 mm, and the screwdriver bit length for tightening the screws is 50 mm. Even after the bit is assembled onto the output shaft 21, the screws can still be installed in a small space, ensuring the assembly efficiency of the washbasin.

[0055] like Figure 7As shown, in some embodiments, the distance L from the first axis 211 to the motor bearing 12 is less than or equal to 50 mm. Exemplarily, the distance L from the first axis 211 to the motor bearing 12 can be 40 mm, 39 mm, 38 mm, 37 mm, 36 mm, or 35 mm. By further limiting the distance L from the first axis 211 to the motor bearing 12, the space occupied by the head housing 41 in the direction of the motor axis 111 can be further reduced, thereby further improving the compactness of the head structure of the angular impact tool.

[0056] like Figure 6 As shown, in some embodiments, the width W1 of the head housing 41 is less than or equal to 45 mm. Exemplarily, the width W1 of the head housing 41 can be 44 mm, 43 mm, 42 mm, 41 mm, 40 mm, 39 mm, 38 mm, 37 mm, 36 mm, 35 mm, or 34 mm. By limiting the width W1 of the head housing 41, the space occupied by the head housing 41 of the angular impact tool can be further reduced. When the angular impact tool is needed for edge-applying operations, it can well meet the usage requirements. Through the above settings, the application scenarios and scope of this angular impact tool can be further expanded, and the application flexibility of this angular impact tool can be improved.

[0057] like Figure 5 As shown, in some embodiments, the output mechanism 2 further includes an impact assembly 22, which includes a main shaft 221 and an impact block 222. The impact block 222 is sleeved on the main shaft 221, which is driven by the motor 1 to drive the output shaft 21. When the angular impact tool is working normally, the power output by the motor 1 is transmitted to the main shaft 221, which drives the coaxially arranged output shaft 21 to rotate. During this process, the impact block 222 is fixed by a spring and rotates synchronously with the main shaft 221 without impact action. When the torque demand of the output shaft 21 is greater than the continuous torque of the motor 1 × the reduction ratio, the impact block 222 overcomes the spring preload and disengages from the main shaft 221. The main shaft 221 continues to rotate, while the impact block 222 begins to store energy due to inertial lag. Subsequently, the impact block 222 strikes the anvil on the output shaft 21 at high speed, converting kinetic energy into instantaneous impact torque. This combines the rotational torque with the oblique impact force to form a spiral resistance breaking effect, achieving power superposition. Impact block 222 is typically designed for 15°-25° angled impact, balancing torque transmission and anti-slip properties.

[0058] In some embodiments, the transmission mechanism 3 is a two-stage transmission. By adopting the two-stage transmission mechanism 3, the output speed of the motor shaft 11 of the motor 1 can be reduced and the torque amplified. Thus, after being transmitted through the transmission mechanism 3, the output torque of the output shaft 21 is increased, ensuring that screws, bolts, or nuts can be quickly disassembled and assembled, and ensuring that the torque required for disassembly and assembly meets the requirements.

[0059] like Figure 5 As shown, in some embodiments, the transmission mechanism 3 includes a reversing assembly 32 and a transmission shaft 31. The reversing assembly 32 includes a first bevel gear 321 and a second bevel gear 322 that mesh with each other. The first bevel gear 321 is fixedly sleeved on the transmission shaft 31, and the second bevel gear 322 is fixedly sleeved on the main shaft 221. During operation, the motor 1 drives the transmission shaft 31 to rotate. The transmission shaft 31, through the meshing of the first bevel gear 321 and the second bevel gear 322, causes the main shaft 221 to rotate. The main shaft 221 then drives the output shaft 21 to rotate, thereby achieving power output. Using bevel gear transmission allows for the transmission of power across non-parallel shafts at an angle, saves space, achieves a compact design, and provides high transmission efficiency.

[0060] like Figure 5 As shown, in some embodiments, the meshing tooth surface of the second bevel gear 322 faces upward. This arrangement facilitates the placement of the second bevel gear 322 within the head housing 41, ensuring a compact structure of the head housing 41 during the meshing transmission of the first bevel gear 321 and the second bevel gear 322.

[0061] like Figure 8 As shown, in some embodiments, the transmission mechanism 3 further includes a speed change component 33, which includes a planetary gear set connecting the motor 1 and the drive shaft 31. During the operation of the angular impact tool, the motor 1 drives the drive shaft 31 to rotate via the planetary gear set. The drive shaft 31 is driven by the meshing of the first bevel gear 321 and the second bevel gear 322, thereby rotating the main shaft 221. The main shaft 221 drives the output shaft 21 to achieve power output. The planetary gear set reduces the high speed of the motor 1 to a speed suitable for impact, and through the meshing of the planetary gears with the sun gear / ring gear, it adapts to the spatial layout requirements of the motor shaft 111 and the impact block 222 (especially in compact designs). The planetary gear set can synchronously share the load through 3-4 planetary gears, avoiding single-point stress concentration, extending gear life, and the multi-tooth meshing offsets radial force, reducing high-frequency vibration during the operation of the angular impact tool, making it easier for construction personnel to use. Through high-density power transmission and space optimization, the planetary gear set becomes the key to achieving "small volume and high torque" in the angular impact tool, and its performance directly determines the tool's obstacle-breaking ability and service life.

[0062] like Figure 1As shown, in some embodiments, the housing 4 includes a second housing 43, which forms a grip portion 431 that at least partially overlaps with the motor 1. By providing the second housing 43, and having the second housing 43 form the grip portion 431, it facilitates user gripping and use. Since the grip portion 431 at least partially overlaps with the motor 1, the length of the angular impact tool is shortened, thus facilitating use. To prevent slippage when using the angular impact tool, an anti-slip structure is provided at the grip portion 431. For example, anti-slip textures, anti-slip protrusions, or anti-slip grooves can be provided at the grip portion 431 of the second housing 43. Alternatively, an anti-slip sleeve, which can be made of rubber, can be fixedly fitted onto the grip portion 431.

[0063] like Figure 1 and Figure 2 As shown, in some embodiments, the angular impact tool further includes a battery pack 5, the insertion direction of which is substantially consistent with the extension direction of the second housing 43. Using the battery pack 5 for power supply improves the ease of use of this angular impact tool. When the battery pack 5 is depleted, it can be removed from the housing 4 for charging, and then replaced with a fully charged battery pack 5 to continue operation. The battery pack 5, in conjunction with a corresponding power circuit, supplies power to the angular impact tool. Those skilled in the art should understand that in other embodiments, the angular impact tool can also be powered by other power supply devices. For example, the power supply can be an AC power cord connected to the mains, or it can be other connecting cables that can be connected to a power supply device. The mains power or other power supply devices, in conjunction with corresponding rectification, filtering, and voltage regulation circuits, provide power to the corresponding components of the angular impact tool.

[0064] In some embodiments, motor 1 is a brushless motor. Using a brushless motor offers the following advantages: 1. High-efficiency conversion: Brushless motors achieve efficiencies of 85%-95% (compared to only 60%-75% for traditional brushed motors 1), reducing energy loss by more than 30% and significantly extending the battery pack 5's range. 2. Instantaneous torque burst: Electronic commutation enables millisecond-level response (<10ms) of 0-100% torque, perfectly matching the high-frequency load fluctuation requirements of angular impact tools. Furthermore, the elimination of carbon brushes and commutator structures avoids spark wear and carbon buildup problems, increasing lifespan by 3-5 times. Brushless motors can adopt an IP54 dustproof and waterproof design, adapting to dusty / oily construction environments, reducing maintenance costs by 80%.

[0065] like Figures 1-8 As shown, this application also provides an angular impact screwdriver 100, which includes a motor 1, an output mechanism 2, a transmission mechanism 3, a housing 4, and a locking device 6.

[0066] The motor 1 has a motor shaft 11 that rotates about a motor axis 111, and the motor shaft 11 is supported by a motor bearing 12. The motor 1 is a brushless motor. The output mechanism 2 includes an output shaft 21 that rotates about a first axis 211 and an impact assembly 22. The output shaft 21 is driven by the motor 1, and the first axis 211 intersects the motor axis 111. The output shaft 21 is configured to detachably mount one of a plurality of tool heads 200. A transmission mechanism 3 connects the motor 1 and the output mechanism 2. The housing 4 includes a head housing 41, which at least supports the output mechanism 2. A locking device 6 is used to limit the tool head 200. In the direction of the first axis 211, the distance H2 from the locking device 6 to the top of the head housing 41 is less than or equal to 70 mm. Exemplarily, the distance H2 from the locking device 6 to the top of the head housing 41 can be 69 mm, 68 mm, 67 mm, 66 mm, 65 mm, 64 mm, 63 mm, 62 mm, 61 mm, or 60 mm.

[0067] When using the angular impact screwdriver 100, different diameter tool heads 200 (bits) can be replaced to meet the tightening requirements of different screw types. Furthermore, the locking device 6 facilitates the installation and removal of the tool head 200. By limiting the distance H2 from the locking device 6 to the top of the head housing 41, the head structure of the angular impact screwdriver 100 is made compact, thus meeting the requirements for working in confined spaces and reducing the difficulty of operation in such spaces.

[0068] like Figures 1-8 As shown, this application also provides an angular impact tool, which includes a motor 1, an output mechanism 2, a transmission mechanism 3, and a housing 4.

[0069] The motor 1 has a motor shaft 11 that rotates about a motor axis 111, and the motor shaft 11 is supported by a motor bearing 12. The output mechanism 2 includes an output shaft 21 that rotates about a first axis 211 and an impact assembly 22. The output shaft 21 is driven by the motor 1, and the first axis 211 intersects the motor axis 111. The output shaft 21 is configured to detachably mount one of a plurality of tool heads 200. A transmission mechanism 3 connects the motor 1 and the output mechanism 2. The housing 4 includes a head housing 41, which at least supports the output mechanism 2. In the direction of the first axis 211, the height H1 of the head housing 41 is less than or equal to 70 mm, and the width W1 of the head housing 41 is less than or equal to 45 mm. Exemplarily, the height H1 of the head housing 41 can be 69 mm, 68 mm, 67 mm, 66 mm, 65 mm, 64 mm, 63 mm, 62 mm, 61 mm, or 60 mm. The width W1 of the head shell 41 can be 44mm, 43mm, 42mm, 41mm, 40mm, 39mm, 38mm, 37mm, 36mm, 35mm, or 34mm.

[0070] When using an angular impact tool, different diameter tool heads 200 (screwdriver bits) can be replaced to accommodate the tightening of screws of various sizes. Furthermore, by arranging the impact assembly 22, the rotational torque and oblique impact force are combined to create a spiral-like resistance-breaking effect, achieving power superposition. By limiting the height H1 and width W1 of the head housing 41, the head structure of the angular impact tool is made compact, thus meeting the requirements for working in confined spaces and reducing the difficulty of operation in such spaces.

[0071] When using an angular impact screwdriver, in order to quickly change the tool head, such as... Figures 1-22 As shown, this application provides an angular impact screwdriver. The angular impact screwdriver 100 includes a motor 1, an output mechanism 2, a transmission mechanism 3, a housing 4, and a locking device 6.

[0072] The motor 1 has a motor shaft 11 that rotates about a motor axis 111. The output mechanism 2 includes an output shaft 21 that rotates about a first axis 211 and an impact assembly 22. The output shaft 21 is driven by the motor 1 and the first axis 211 intersects the motor axis 111. The output shaft 21 is configured to detachably mount one of a plurality of tool heads 200. A transmission mechanism 3 connects the motor 1 and the output mechanism 2. The housing 4 includes a first housing 42 supporting the output mechanism 2 and a second housing 43 supporting the motor 1. The first housing 42 is formed or connected to the second housing 43. A locking device 6 is used to clamp the tool head 200 and does not protrude downward from the bottom surface of the first housing 42.

[0073] When the angular impact screwdriver 100 is in operation, the locking device 6 clamps the tool head 200 onto the output shaft 21. When it is necessary to replace the tool head 200, simply pull the tool head 200 out of the locking device 6, and then a new tool head 200 can be replaced, ensuring the flexibility of tool head replacement. Moreover, since the locking device 6 does not protrude downwards from the bottom surface of the first housing 42, the head structure of the angular impact screwdriver 100 is relatively compact, which can meet the requirements of working in confined spaces.

[0074] like Figures 9-14As shown, in some embodiments, the locking device 6 includes an elastic element 62 and a locking element 61. The locking element 61 is movably mounted on the output shaft 21 and can move along the extension direction of the motor axis 111 to lock or unlock the tool head 200. The elastic element 62 is mounted on the output shaft 21 and abuts against the end of the locking element 61 away from the first axis 211. An arc-shaped annular groove 201 is formed on the outer peripheral surface of the tool head 200. When the tool head 200 is inserted into the output shaft 21, the end of the tool head 200 pushes the locking element 61 to move away from the first axis 211. During this process, the elastic element 62 is pushed, thereby generating elastic deformation. When the arc-shaped annular groove 201 of the tool head 200 is aligned with the locking element 61, the locking element 61 moves towards the first axis 211 under the action of the elastic restoring force of the elastic element 62, thereby cooperating with the arc-shaped annular groove 201 to lock the tool head 200. When it is necessary to replace the tool head 200, the user forcefully pulls the tool head 200 out of the output shaft 21. During this process, the locking member 61 moves along the arc surface of the arc groove in a direction away from the first axis 211 until the tool head 200 is completely pulled out. Under the elastic restoring force of the elastic member 62, the locking member 61 resets. The above structure enables one-handed insertion and removal of the tool head 200, thus facilitating the user's tool head 200 replacement operation.

[0075] like Figure 11 and Figure 14 As shown, in some embodiments, the output shaft 21 has a mounting cavity for mounting the tool head 200 and a mounting hole communicating with the mounting cavity, and the locking member 61 is movably disposed in the mounting hole. This arrangement facilitates the installation of the locking member 61, and the locking member 61 moves only within the mounting hole. When the locking member 61 extends towards the first axis 211 relative to the mounting hole under the action of the elastic member 62, it can engage and lock the tool head 200. When the locking member 61 retracts towards the first axis 211 relative to the mounting hole, the locking member 61 separates from the tool head 200.

[0076] like Figure 11 and Figure 14 As shown, in some embodiments, an annular groove is formed on the outer peripheral surface of the output shaft 21, and the elastic element 62 is arc-shaped and located in the annular groove. By designing the elastic element 62 as arc-shaped, it is convenient to install the elastic element 62 into the arc-shaped groove.

[0077] like Figure 11 and Figure 14 As shown, in some embodiments, the locking member 61 is spherical. By designing the locking member 61 as spherical, the contact between the locking member 61 and the tool head 200 is a point contact. This allows the tool head 200 to effectively engage with the locking member 61 when the user inserts or removes the tool head 200, preventing jamming.

[0078] In some embodiments, the output shaft 21 has a mounting cavity for mounting the tool head 200, and the walls and / or bottom of the mounting cavity are magnetic. The output shaft 21 can be magnetized by magnetizing the portion of the output shaft 21 corresponding to the mounting cavity. The tool head 200 is typically made of ferromagnetic materials such as steel. When the tool head 200 is inserted into the mounting cavity, it is attracted to the output shaft 21, ensuring a stable mounting of the tool head 200 onto the output shaft 21. The mounting cavity can be designed as a regular hexagon, and similarly, the cross-section of the tool head 200 is typically also a regular hexagon. After the tool head 200 is inserted into the output shaft 21, a stable connection between the tool head 200 and the output shaft 21 is ensured. When it is necessary to replace or remove the tool head 200, only the magnetic attraction and the clamping force of the locking device 6 need to be overcome. Of course, in some embodiments, the tool head 200 can be designed to be magnetic. Typically, the output shaft 21 is made of ferromagnetic materials such as steel. When the tool head 200 is inserted into the output shaft 21, the tool head 200 and the output shaft 21 can also be magnetically connected.

[0079] In some embodiments, the locking device 6 includes a magnetic suction element, and the output shaft 21 has a mounting cavity for mounting the tool head 200. The magnetic suction element is fixedly disposed on the wall and / or bottom surface of the mounting cavity. With this configuration, when the tool head 200 is mounted on the output shaft 21, a magnetic connection between the tool head 200 and the output shaft 21 can be achieved. When it is necessary to replace or remove the tool head 200, only the magnetic force needs to be overcome, facilitating the installation and removal of the tool head 200. In other embodiments, the magnetic suction element can also be mounted on the tool head 200, which similarly achieves a magnetic connection between the tool head 200 and the output shaft 21. Furthermore, the magnetic connection can be combined with the clamping of the tool head 200 by the locking device 6, providing a dual connection and ensuring a stable connection between the tool head 200 and the output shaft 21.

[0080] like Figures 15 to 20 As shown, in some embodiments, the locking device 6 may also employ a sleeve 63 and a locking element 61. The sleeve 63 is sleeved on the output shaft 21 and is movable along the axial direction of the output shaft 21. The sleeve 63 has a locked position and an unlocked position relative to the output shaft 21. Figures 15-17 As shown, when the sleeve 63 is in the locked position, the locking member 61 abuts against the inner wall of the sleeve 63, so that the locking member 61 cooperates with the tool head 200 to lock the position of the tool head 200 on the output shaft 21. Figures 18-20As shown, when the tool head 200 needs to be removed, the user moves the sleeve 63 towards the tool head 200, thus switching from the locked position to the unlocked position. The locking element 61 separates from the sleeve 63, and the tool head 200 can be easily pulled out. To enable the sleeve 63 to automatically reset, a return spring 64 is installed in the sleeve 63. One end of the return spring 64 abuts against the sleeve 63, and the other end abuts against the output shaft 21. When the sleeve 63 switches from the locked position to the unlocked position, the return spring 64 is compressed and in a stored state. When the user releases the sleeve 63, the sleeve 63 resets under the action of the return spring 64.

[0081] like Figures 1-20 As shown, this application also provides an angular impact screwdriver 100, which includes a motor 1, an output mechanism 2, a transmission mechanism 3, a housing 4, and a locking device 6.

[0082] The device includes a motor shaft 11 that rotates about a motor axis 111. The output mechanism 2 includes an output shaft 21 that rotates about a first axis 211 and an impact assembly 22. The output shaft 21 is driven by the motor 1, and the first axis 211 intersects the motor axis 111. The output shaft 21 is configured to detachably mount one of a plurality of tool heads 200. A transmission mechanism 3 connects the motor 1 and the output mechanism 2. The housing 4 includes a first housing 42 supporting the output mechanism 2 and a second housing 43 supporting the transmission mechanism 3. The first housing 42 is formed in or connected to the second housing 43. A locking device 6 limits the tool head 200; the tool head 200 is configured to be operable by the user to change the limiting state of the locking device 6.

[0083] During the use of the angular impact screwdriver 100, the user can change the limit state of the locking device 6 by operating the tool head 200, thereby facilitating the replacement of the tool head 200 as needed.

[0084] In some embodiments, the limiting state includes a holding limiting state and a releasing limiting state. When the locking member 61 of the locking device 6 is in the holding limiting state, the locking member 61 cooperates with the tool head 200 to lock the tool head 200. When the locking member 61 of the locking device 6 is in the releasing limiting state, the locking member 61 is disengaged from the tool head 200, and the tool head 200 can be replaced or removed.

[0085] When using an angular impact screwdriver, in order to facilitate control of its start and stop and improve its compactness, such as... Figures 1-8 As shown, this application provides an angular impact screwdriver 100. The angular impact screwdriver 100 includes a motor 1, an output mechanism 2, a transmission mechanism 3, and a switch 7.

[0086] like Figure 7As shown, the motor 1 has a motor shaft 11 that rotates about a motor axis 111. The output mechanism 2 includes an output shaft 21 that rotates about a first axis 211, the output shaft 21 being driven by the motor 1 and the first axis 211 intersecting the motor axis 111. A transmission mechanism 3 connects the motor 1 and the output mechanism 2. A switch 7 is operated by the user to trigger the motor 1 to start. The total length of the projection of the operable area 71 of the switch 7 and the motor shaft 11 in the direction of the motor axis 111 is L1; and the overlap length of the projection of the operable area 71 of the switch 7 and the motor shaft 11 in the direction of the motor axis 111 is L2; ​​wherein the ratio of L2 to L1 is greater than or equal to 50%. Exemplarily, the ratio of L2 to L1 can be 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, or 100%.

[0087] With the above arrangement, the projection of most of the operable area 71 of the switch 7 onto the motor shaft 11 coincides with the motor shaft 11, making it convenient for the user to operate the switch 7 while holding the angular impact screwdriver 100. Moreover, the above structure can shorten the length of the angular impact screwdriver 100, improve its compactness, make it easier for the user to carry, and use in smaller spaces.

[0088] like Figure 7 As shown, in some embodiments, the total projected length of the switch element 7 and the motor shaft 11 in the direction of the motor axis 111 is L3; and the overlapping length of the projected lengths of the switch element 7 and the motor shaft 11 in the direction of the motor axis 111 is L4, where the ratio of L4 to L3 is greater than or equal to 50%. Exemplarily, the ratio of L4 to L3 can be 59%, 60%, 61%, 62%, 63%, 64%, or 65%. By limiting the ratio of L4 to L3, a larger overlap area between the switch element 7 and the motor shaft 11 in the direction of the motor axis 111 is ensured. Furthermore, through the above arrangement, it is possible to ensure that the switch element 7 has a certain length, thereby facilitating operation and control when operating the switch element 7.

[0089] like Figures 1-8 As shown, this application also provides an angular impact screwdriver 100, which includes a motor 1, an output mechanism 2, a transmission mechanism 3, and a switch 7.

[0090] The motor 1 has a motor shaft 11 that rotates about a motor axis 111; the output mechanism 2 includes an output shaft 21 that rotates about a first axis 211, the output shaft 21 being driven by the motor 1 and the first axis 211 intersecting the motor axis 111. A transmission mechanism 3 connects the motor 1 and the output mechanism 2. A switch 7 is operated by the user to trigger the motor 1 to start. In the direction of the motor axis 111, the distance from the front end of the operable area 71 of the switch 7 to the first axis 211 is L5; the distance from the motor bearing 12 of the motor shaft 11 to the first axis 211 is L; wherein the sum of L5 and L is less than or equal to 100 mm. Exemplarily, the sum of L5 and L can be 98 mm, 96 mm, 94 mm, 92 mm, or 90 mm.

[0091] By limiting the distance L5 from the front end of the operable area 71 of the switch 7 to the first axis 211 and the distance L from the motor bearing 12 to the first axis 211, the length of the angular impact screwdriver 100 can be kept short, thereby improving the compactness of the angular impact screwdriver 100.

[0092] In some embodiments, the distance from the center of gravity of the angular impact screwdriver 100 to the first axis 211 is less than or equal to 76 mm, and the distance from the center of gravity of the angular impact screwdriver 100 to the end of the output shaft 21 is less than or equal to 40.5 mm. Exemplarily, the distance from the center of gravity of the angular impact screwdriver 100 to the first axis 211 can be 75 mm, 74 mm, 73 mm, 72 mm, 71 mm, or 70 mm. The distance from the center of gravity of the angular impact screwdriver 100 to the end of the output shaft 21 can be 40 mm, 39 mm, 38 mm, 37 mm, 36 mm, or 35 mm. Through the above settings, the center of gravity of the angular impact screwdriver 100 is close to the head, thereby ensuring the weight of the head. During use, this ensures that the screwdriver bit has sufficient weight applied to the screw, thereby reducing the user's labor intensity and ensuring work efficiency.

[0093] like Figure 8 As shown, in some embodiments, the angular impact screwdriver 100 uses a PCB board 8 as a controller. The PCB board 8 is electrically connected to the motor 1 and the switch 7. The PCB board 8 at least partially overlaps with the battery pack 5 in the direction of the motor axis 111. With the above arrangement, the space occupied by the PCB board 8 in the length direction of the angular impact screwdriver 100 can be reduced, ensuring the compactness of the angular impact screwdriver 100.

[0094] like Figure 2As shown, in some embodiments, in order to effectively cool the motor 1 and ensure its normal operation, thereby extending the service life of the angular impact screwdriver 100, an air inlet 44 and an air outlet 45 are spaced apart on the housing 4 along the extension direction of the motor axis 111. The air inlet 44 is located behind the end of the motor 1 away from the output shaft 21, and the air outlet 45 is located in front of the end of the planetary gear set facing the output shaft 21. During the operation of the angular impact screwdriver 100, external air enters through the air inlet 44 and is discharged through the air outlet 45, which, while cooling the motor 1 through heat exchange, prevents heated air from blowing onto the user's hands.

[0095] like Figures 21-22 As shown, in some embodiments, the angular impact screwdriver 100 includes a trigger control assembly 9, which includes a trigger link 92 and a switch body 91. The switch body 91 is disposed in the housing 4 and is electrically connected to the motor 1. The trigger link 92 is rotatably disposed on the housing 4, and one end of the trigger link 92 abuts against the switch element 7. One end of the switch element 7 is hinged to the housing 4, and the operable area 71 of the switch element 7 extends relative to the housing 4. When it is necessary to start the motor 1, the user presses the switch element 7, which rotates relative to the housing 4, thereby driving the trigger link 92 to rotate. The trigger link 92 triggers the switch body 91, thereby starting the motor 1. By adopting the above structure and utilizing the lever principle, it is convenient for the user to operate. When the angular impact screwdriver 100 stops working, in order to enable the switch element 7 to automatically reset, a compression spring is provided between the switch element 7 and the switch body 91. One end of the compression spring abuts against the switch element 7, and the other end of the compression spring abuts against the switch element 7. When the switch 7 is pressed to start the motor 1, the compression spring is in a compressed and energy-storing state. When the angular impact screwdriver 100 stops working, the user releases the switch 7, and the switch 7 automatically resets under the elastic restoring force of the compression spring.

[0096] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. An angular impact screwdriver, comprising: The motor (1) has a motor shaft (11) that rotates about the motor axis (111); The output mechanism (2) includes an output shaft (21) that rotates about a first axis (211), the output shaft (21) being driven by the motor (1) and the first axis (211) intersecting the motor axis (111); A transmission mechanism (3) is used to connect the motor (1) and the output mechanism (2); Its features are, It also includes a switch (7) for user operation to trigger the motor (1) to start; The total length of the projected area (71) of the operable region of the switch (7) and the motor shaft (11) along the direction of the motor axis (111) is L1; and The overlap length of the projection of the operable area (71) of the switch (7) and the motor shaft (11) in the direction of the motor axis (111) is L2; ​​wherein the ratio of L2 to L1 is greater than or equal to 50%.

2. The angular impact screwdriver of claim 1, wherein, The overlap length of the projection of the operable area (71) of the switch (7) and the motor shaft (11) in the direction of the motor axis (111) is L2; ​​wherein the ratio of L2 to L1 is greater than or equal to 60%.

3. An angular impact screwdriver, comprising: The motor (1) has a motor shaft (11) that rotates about the motor axis (111); The output mechanism (2) includes an output shaft (21) that rotates about a first axis (211), the output shaft (21) being driven by the motor (1) and the first axis (211) intersecting the motor axis (111); A transmission mechanism (3) is used to connect the motor (1) and the output mechanism (2); Its features are, It also includes a switch (7) for user operation to trigger the motor (1) to start; In the direction of the motor axis (111), the distance from the front end of the operable area (71) of the switch (7) to the first axis (211) is L5; the distance from the motor bearing (12) of the motor shaft (11) to the first axis (211) is L; Wherein, the sum of L5 and L is less than or equal to 100mm.

4. The angular impact screwdriver of claim 3, wherein, The distance L from the motor bearing (12) to the first axis (211) is less than or equal to 60 mm.

5. The angular impact screwdriver of claim 3, wherein, It also includes a housing (4), which includes a head housing (41) for supporting the output mechanism (2).

6. The angular impact screwdriver of claim 5, wherein, The width W1 of the head shell (41) is less than or equal to 45 mm.

7. The angular impact screwdriver according to any one of claims 3-6, characterized in that, The output mechanism (2) further includes an impact assembly (22), which includes a main shaft (221) and an impact block (222). The impact block (222) is sleeved on the main shaft (221), and the main shaft (221) is driven by the motor (1) to drive the output shaft (21).

8. The angular impact screwdriver according to claim 7, characterized in that, The transmission mechanism (3) includes a reversing assembly (32) and a transmission shaft (31). The reversing assembly (32) includes a first bevel gear (321) and a second bevel gear (322) that mesh with each other. The first bevel gear (321) is fixedly sleeved on the transmission shaft (31), and the second bevel gear (322) is fixedly sleeved on the main shaft (221).

9. The angular impact screwdriver according to claim 8, characterized in that, The meshing tooth surface of the second bevel gear (322) faces upward.

10. The angular impact screwdriver according to any one of claims 3-6, characterized in that, The motor (1) is a brushless motor.

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