Electric tool with saw blade convenient to replace

Abstract

The utility model belongs to the technical field of electric tools, and particularly relates to an electric tool with a saw blade convenient to replace. The locking assembly and the shifting assembly are coaxially arranged, the locking assembly comprises a locking rod, a locking sleeve, a limiting sleeve and a ball body, the first end of the locking rod penetrates through the limiting sleeve and is connected with the shifting assembly, a first annular groove is formed in the first end, a notch is formed in the limiting sleeve in the circumferential direction of the limiting sleeve, and the ball body is located between the first annular groove and the notch; the locking sleeve is arranged on the periphery of the limiting sleeve in a sleeving mode, a first groove and a second groove which intersect and communicate with each other are formed in the locking sleeve in the circumferential direction of the locking sleeve, and the maximum outer diameter of the first groove is smaller than that of the second groove; the saw blade is connected with the second end, away from the shifting assembly, of the locking rod, the ball is located in the first groove, and the locking rod can drive the saw blade to execute operation; and the ball body moves to the second groove, so that the locking rod and the saw blade are detached from the locking assembly. The saw blade can be rapidly replaced, the structure is simple, and assembling and maintaining are convenient.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and more specifically, to a power tool that facilitates saw blade replacement. Background Technology

[0002] Most multi-functional saws on the market today use pressure plates and hex socket head cap screws for fixing. Replacing the saw blade requires either tightening or loosening with a special tool, or simply rotating the retaining ring by hand. Due to the complex structure of multi-functional saws, assembly is difficult and blade replacement is not straightforward. Utility Model Content

[0003] The purpose of this application is to provide a power tool that facilitates saw blade replacement, which enables quick saw blade replacement and has a simple structure that is easy to assemble and maintain.

[0004] Therefore, this application proposes a power tool for easy saw blade replacement, comprising: an actuating assembly; a locking assembly coaxially arranged with the actuating assembly, the locking assembly including a locking rod, a locking sleeve, a limiting sleeve, and a ball, the first end of the locking rod passing through the limiting sleeve and connected to the actuating assembly, the first end having a first annular groove, the limiting sleeve having a notch along its circumference, the ball being located between the first annular groove and the notch, the locking sleeve being fitted around the outer circumference of the limiting sleeve, the locking sleeve having an intersecting and communicating first groove and second groove along its circumference, the maximum outer diameter of the first groove being smaller than the maximum outer diameter of the second groove; and a saw blade connected to the second end of the locking rod away from the actuating assembly, wherein in a first state, the ball is located in the first groove, and the locking rod can drive the saw blade to reciprocate around its own axis to perform work; in a second state, the actuating assembly can drive the locking sleeve to rotate by a preset angle, so that the limiting sleeve moves a preset distance along the axial direction of the locking rod, and simultaneously drive the ball to move from the first groove to the second groove, so as to disassemble the locking rod and the saw blade from the locking assembly.

[0005] According to the embodiments of this application, a power tool for easy saw blade replacement includes an actuating assembly, a locking assembly, and a saw blade. The locking assembly includes a locking rod, a locking sleeve, a limiting sleeve, and a ball. The first end of the locking rod passes through the limiting sleeve and is connected to the actuating assembly. The first end is provided with a first annular groove. The limiting sleeve is provided with a notch along its circumference. The ball is located between the first annular groove and the notch. The locking sleeve is fitted on the outer circumference of the limiting sleeve. The locking sleeve is provided with an intersecting and communicating first groove and second groove along its circumference. The maximum outer diameter of the first groove is smaller than the maximum outer diameter of the second groove. In a first state, the ball is located in the first groove, and the locking rod can drive the saw blade to reciprocate around its own axis to perform work. In a second state, the actuating assembly drives the locking sleeve to rotate by a preset angle, causing the limiting sleeve to move a preset distance along the axial direction of the locking rod, and at the same time, driving the ball to move from the first groove to the second groove, so as to disassemble the locking rod and the saw blade from the locking assembly. This enables quick saw blade replacement and has a simple structure that is easy to assemble and maintain.

[0006] In addition, the power tool according to this application that facilitates saw blade replacement may also have the following additional technical features:

[0007] In some embodiments of this application, the locking assembly further includes a positioning sleeve and an elastic element. The positioning sleeve is sleeved on the outer periphery of the locking rod, the limiting sleeve, and the locking sleeve. One end of the positioning sleeve is connected to the shift fork assembly, and the elastic element is disposed between the other end of the positioning sleeve and the limiting sleeve.

[0008] In some embodiments of this application, the limiting sleeve further includes a flange disposed along its circumference, the flange contacting the end face of the locking sleeve to form a cavity for accommodating the ball; a first plane is formed on the outer circumferential surface of the flange corresponding to the notch; a second plane is disposed on the inner circumferential surface of the positioning sleeve, and in the second state, the first plane and the second plane are fitted together.

[0009] In some embodiments of this application, the first end of the locking rod is further provided with a second annular groove, the second annular groove being located on the side of the first annular groove facing the second end, and an anti-disengagement component is provided between the second annular groove and the limiting sleeve.

[0010] In some embodiments of this application, the actuating assembly includes a push rod and a sleeve. The sleeve is fitted around the outer periphery of the push rod and threadedly connected to the push rod. A knob is provided at one end of the push rod extending from the sleeve, and the other end of the push rod is connected to a locking sleeve, so that the actuating assembly drives the locking sleeve to rotate by a preset angle through the push rod.

[0011] In some embodiments of this application, the outer peripheral surface of the end of the push rod connected to the locking sleeve is formed with a third plane, and the locking sleeve also includes a through groove sleeved on the outer periphery of the push rod, the inner peripheral surface of the through groove is formed with a fourth plane, and the third plane and the fourth plane are fitted together.

[0012] In some embodiments of this application, the power tool further includes a motor and an eccentric sleeve assembly. The motor includes an output shaft that rotates about its own axis. The eccentric sleeve assembly is eccentrically disposed relative to the output shaft. The axial direction of the locking rod intersects with the axial direction of the output shaft. The actuating assembly further includes a shift fork, which includes a cylindrical portion and a fork portion connected to each other. The cylindrical portion is sleeved on the outer periphery of a portion of the locking assembly. The fork portion is connected to the end of the eccentric sleeve assembly away from the output shaft. In a first state, the locking rod and the shift fork are connected as one unit. The motor drives the shift fork to reciprocate through the eccentric sleeve assembly, so that the locking rod can drive the saw blade to reciprocate about its own axis.

[0013] In some embodiments of this application, the eccentric sleeve assembly includes an eccentric sleeve, a positioning shaft, and a positioning bearing. The eccentric sleeve is provided with a first hole and a second hole that are interconnected along its own axial direction, and the central axis of the first hole is eccentrically set relative to the central axis of the second hole. The output shaft of the motor extends into the first hole, the positioning shaft extends into the second hole, and the positioning bearing is disposed between the positioning shaft and the fork.

[0014] In some embodiments of this application, the power tool further includes a first housing and a second housing connected to each other, with the motor disposed in the first housing and the eccentric sleeve assembly, the actuating assembly and the locking assembly disposed in the second housing respectively.

[0015] In some embodiments of this application, the second housing includes a first cylindrical shell and a second cylindrical shell that are intersected and connected to each other. An eccentric sleeve assembly is disposed inside the first cylindrical shell, and a fixed bearing is disposed between the eccentric sleeve assembly and the first cylindrical shell. An actuating assembly and a locking assembly are respectively disposed inside the second cylindrical shell, and a first bearing is disposed between the actuating assembly and the second cylindrical shell, and a second bearing is disposed between the locking assembly and the second cylindrical shell.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0019] Figure 1 This is a schematic diagram of the structure of the power tool according to an embodiment of this application;

[0020] Figure 2 for Figure 1 The diagram shows a cross-sectional view of the power tool along direction AA.

[0021] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the power tool along direction BB.

[0022] Figure 4 for Figure 1 An exploded view of the locking assembly in the power tool shown.

[0023] Figure 5 for Figure 1 The diagram shows an exploded view of the push rod and locking sleeve in the power tool shown.

[0024] Figure 6 for Figure 1 The diagram shows a partially enlarged structural schematic of the power tool shown.

[0025] Figure 7 for Figure 6 A schematic diagram of the structure of the shift fork component;

[0026] Figure 8 for Figure 6 A cross-sectional schematic diagram of the eccentric sleeve assembly and the motor.

[0027] The labels in the attached diagram are as follows:

[0028] 100. Power tools;

[0029] 1. Motor; 11. Output shaft;

[0030] 2. Eccentric sleeve assembly; 21. Eccentric sleeve; 211. First hole; 212. Second hole; 22. Positioning shaft; 23. Positioning bearing;

[0031] 3. Actuating assembly; 31. Shift fork; 311. Cylinder; 312. Fork; 32. Push rod; P3. Third plane; 33. Sleeve; 34. Knob; 35. First bearing; 36. First retaining ring;

[0032] 4. Locking assembly; 41. Locking rod; a. First end; b. Second end; 411. First annular groove; 412. Second annular groove; 42. Locking sleeve; 421. First groove; 422. Second groove; 423. Through groove; P4. Fourth plane; 43. Limiting sleeve; 431. Notch; 432. Flange; P1. First plane; 44. Ball; 45. Anti-loosening component; 46. Positioning sleeve; P2. Second plane; 47. Elastic component; 48. Second bearing; 49. Second retaining ring;

[0033] 5. Saw blade; 6. First housing; 7. Second housing; 71. First cylindrical shell; 72. Second cylindrical shell; 73. Fixed bearing. Detailed Implementation

[0034] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0035] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0036] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0037] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0038] Figure 1 This is a schematic diagram of the structure of the power tool according to an embodiment of this application. Figure 2 for Figure 1 The diagram shown is a cross-sectional view of the power tool along direction AA. Figure 3 for Figure 1 The diagram shown is a cross-sectional view of the power tool along direction BB. Figure 4 for Figure 1 The diagram shown is an exploded view of the locking assembly in the power tool. Figure 5 for Figure 1 The diagram shows an exploded view of the push rod and locking sleeve in the power tool.

[0039] See Figures 1 to 5 This application provides an electric tool that facilitates the replacement of the saw blade 5, including a toggle assembly 3, a locking assembly 4, and a saw blade 5.

[0040] The locking assembly 4 is coaxially arranged with the actuating assembly 3. The locking assembly 4 includes a locking rod 41, a locking sleeve 42, a limiting sleeve 43, and a ball 44. The first end a of the locking rod 41 passes through the limiting sleeve 43 and is connected to the actuating assembly 3. The first end a is provided with a first annular groove 411. The limiting sleeve 43 is provided with a notch 431 along its circumference. The ball 44 is located between the first annular groove 411 and the notch 431. The locking sleeve 42 is fitted on the outer circumference of the limiting sleeve 43. The locking sleeve 42 is provided with an intersecting and communicating first groove 421 and second groove 422 along its circumference. The maximum outer diameter of the first groove 421 is smaller than the maximum outer diameter of the second groove 422. The saw blade 5 is connected to the second end b of the locking rod 41, which is away from the actuating assembly 3.

[0041] In the first state, the ball 44 is located in the first groove 421, and the locking rod 41 can drive the saw blade 5 to swing back and forth around its own axis to perform the operation; in the second state, the actuating component 3 can drive the locking sleeve 42 to rotate by a preset angle, so that the limiting sleeve 43 moves a preset distance along the axial direction of the locking rod 41, and at the same time drive the ball 44 to move from the first groove 421 to the second groove 422, so as to disassemble the locking rod 41 and the saw blade 5 from the locking component 4.

[0042] In this embodiment, as Figure 4 As shown, the locking assembly 4 includes a locking rod 41, a locking sleeve 42, a limiting sleeve 43, and a ball 44. The first end a of the locking rod 41 passes through the limiting sleeve 43 and is connected to the actuating assembly 3. The second end b of the locking rod 41 is connected to the saw blade 5. The first end a is provided with a first annular groove 411. The limiting sleeve 43 is provided with a notch 431 along its circumference. The ball 44 is located between the first annular groove 411 and the notch 431. The locking sleeve 42 is sleeved on the outer circumference of the limiting sleeve 43, so that the combination of the locking sleeve 42, the limiting sleeve 43, the first annular groove 411 of the locking rod 41, and the ball 44 is similar to a rolling bearing, thereby allowing the locking sleeve 42 to rotate relative to the limiting sleeve 43 or the locking rod 41.

[0043] Optionally, there are at least two spheres 44, and the limiting sleeve 43 is provided with at least two notches 431 at intervals along its circumference. The at least two spheres 44 and the at least two notches 431 correspond one-to-one and are distributed at intervals along the circumference of the locking sleeve 42. While increasing the rolling friction between the locking sleeve 42 and the limiting sleeve 43, it can ensure that the locking sleeve 42 remains balanced during rotation and does not deflect.

[0044] like Figure 5 As shown, the locking sleeve 42 has intersecting and interconnected first groove 421 and second groove 422 along its circumference. The maximum outer diameter of the first groove 421 is smaller than the maximum outer diameter of the second groove 422. Optionally, the center line connecting the first groove 421 and the center line connecting the second groove 422 are perpendicular to each other, so that the actuating component 3 can drive the locking sleeve 42 to rotate at a preset angle of 90°. Optionally, the walls of the first groove 421 and the second groove 422 are arc-shaped surfaces to allow the ball 44 to rotate smoothly within the locking sleeve 42.

[0045] When the ball 44 is located in the first groove 421 of the locking sleeve 42, the locking sleeve 42 is connected to the locking rod 41 in close contact via the ball 44, allowing the locking rod 41 to rotate with the locking sleeve 42, causing the saw blade 5 to reciprocate around its own axis to perform sawing operations. When the actuating component 3 rotates the locking sleeve 42 by a preset angle, the limiting sleeve 43 can move a preset distance along the axial direction of the locking rod 41, causing the ball 44 to roll spirally around the inner wall of the locking sleeve 42 and move from the first groove 421 to the second groove 422. Since the maximum outer diameter of the first groove 421 is smaller than the maximum outer diameter of the second groove 422, the locking sleeve 42 is released from the locking rod 41 via the ball 44 and is no longer in close contact, i.e., the locking rod 41 and the locking sleeve 42 are unlocked, thereby allowing the locking rod 41 and the saw blade 5 to be removed from the locking component 4 for easy replacement of the saw blade 5.

[0046] After the replaced saw blade 5 is connected to the second end b of the locking rod 41, the first end a of the locking rod 41 is inserted into the limiting sleeve 43 again. The actuating assembly 3 is rotated so that the ball 44 can re-enter between the first annular groove 411 and the notch 431 of the first end a, and the ball 44 rotates to the first groove 421 of the locking sleeve 42, so that the locking rod 41 is connected to the locking sleeve 42 as one unit again, and the sawing operation continues.

[0047] According to the embodiments of this application, a power tool 100 for easy saw blade replacement includes an actuating assembly 3, a locking assembly 4, and a saw blade 5. The locking assembly 4 includes a locking rod 41, a locking sleeve 42, a limiting sleeve 43, and a ball 44. The first end a of the locking rod 41 passes through the limiting sleeve 43 and is connected to the actuating assembly 3. The first end a is provided with a first annular groove 411. The limiting sleeve 43 is provided with a notch 431 along its circumference. The ball 44 is located between the first annular groove 411 and the notch 431. The locking sleeve 42 is sleeved on the outer circumference of the limiting sleeve 43. The locking sleeve 42 is provided with an intersecting and communicating first groove 421 and second groove 421 along its circumference. The groove 422 has a maximum outer diameter smaller than that of the first groove 421. In the first state, the ball 44 is located in the first groove 421, and the locking rod 41 can drive the saw blade 5 to swing back and forth around its own axis to perform the operation. In the second state, when the actuating component 3 drives the locking sleeve 42 to rotate at a preset angle, the limiting sleeve 43 moves a preset distance along the axial direction of the locking rod 41, and at the same time drives the ball 44 to move from the first groove 421 to the second groove 422, so as to disassemble the locking rod 41 and the saw blade 5 from the locking component 4, thereby realizing the quick replacement of the saw blade 5, and the structure is simple and easy to assemble and maintain.

[0048] In some embodiments, the locking assembly 4 further includes a positioning sleeve 46 and an elastic element 47. The positioning sleeve 46 is sleeved on the outer periphery of the locking rod 41, the limiting sleeve 43 and the locking sleeve 42. One end of the positioning sleeve 46 is connected to the actuating assembly 3, and the elastic element 47 is disposed between the other end of the positioning sleeve 46 and the limiting sleeve 43.

[0049] like Figure 2 As shown, the elastic element 47 is a compressible spring, and the elastic element 47 is set between one end of the positioning sleeve 46 and the limiting sleeve 43 with a certain preload. When the actuating component 3 drives the locking sleeve 42 to rotate at a preset angle, the limiting sleeve 43 moves a preset distance along the axial direction of the locking rod 41. At this time, the elastic element 47 is compressed, and the ball 44 moves from the first groove 421 to the second groove 422 to disassemble the locking rod 41 and the saw blade 5 from the locking component 4. Then the elastic element 47 extends and returns to its original state. When the replaced saw blade 5 and locking rod 41 are reinstalled into the locking component 4, the first end a of the locking rod 41 passes through the positioning sleeve 46, the elastic element 47, the limiting sleeve 43 and the locking sleeve 42 in sequence. The actuating component 3 is rotated in the opposite direction, so that the ball 44 re-enters between the first annular groove 411 and the notch 431 of the first end a, and the ball 44 rotates to the first groove 421 of the locking sleeve 42 to reconnect the locking rod 41 with the locking sleeve 42 as one unit, and continue to perform the sawing operation.

[0050] In some embodiments, the limiting sleeve 43 further includes a flange 432 disposed along its circumference, the flange 432 contacting the end face of the locking sleeve 42 to form a cavity for accommodating the ball 44; a first plane P1 is formed on the outer circumferential surface of the flange 432 corresponding to the notch 431; a second plane P2 is disposed on the inner circumferential surface of the positioning sleeve 46, and in the second state, the first plane P1 and the second plane P2 are fitted together.

[0051] like Figure 4 As shown, a first plane P1 is formed on one side of the outer peripheral surface of the flange 432 of the limiting sleeve 43, and a second plane P2 is provided on the inner peripheral surface of the positioning sleeve 46. The number of the first plane P1 and the second plane P2 can be at least one. The first plane P1 and the second plane P2 are fitted together to prevent the limiting sleeve 43 from rotating relative to the positioning sleeve 46, and to ensure that the limiting sleeve 43 and the positioning sleeve 46 can rotate synchronously, thereby facilitating the assembly and disassembly of the locking rod 41.

[0052] In some embodiments, the first end a of the locking rod 41 is further provided with a second annular groove 412, the second annular groove 412 is located on the side of the first annular groove 411 facing the second end b, and an anti-disengagement component 45 is provided between the second annular groove 412 and the limiting sleeve 43.

[0053] like Figure 4As shown, optionally, the anti-detachment component 45 is an O-ring made of flexible materials such as rubber or silicone. The anti-detachment component 45 can fill the gap between the outer wall of the locking rod 41 and the inner wall of the limiting sleeve 43, preventing the locking rod 41 from falling off relative to the limiting sleeve 43. Especially when the saw blade 5 and the locking rod 41 are assembled together into the locking assembly 4, before the reverse rotation of the actuating assembly 3, after the first end a of the locking rod 41 is fitted with the anti-detachment component 45, and then passes through the positioning sleeve 46, the elastic element 47, the limiting sleeve 43 and the locking sleeve 42 in sequence, the anti-detachment component 45 can prevent the locking rod 41 from falling off relative to the limiting sleeve 43.

[0054] In some embodiments, the actuating assembly 3 includes a push rod 32 and a sleeve 33. The sleeve 33 is sleeved on the outer periphery of the push rod 32 and threadedly connected to the push rod 32. A knob 34 is provided at one end of the push rod 32 extending from the sleeve 33, and the other end of the push rod 32 is connected to the locking sleeve 42, so that the actuating assembly 3 drives the locking sleeve 42 to rotate by a preset angle through the push rod 32.

[0055] like Figure 2 and Figure 5 As shown, the push rod 32 is provided with an external thread, and the sleeve 33 is provided with an internal thread. The push rod 32 and the sleeve 33 are threadedly connected. When the knob 34 drives the push rod 32 and the locking sleeve 42 to rotate by a preset angle, the sleeve 33 will push the positioning sleeve 46 and the limiting sleeve 43 to move linearly along the axial direction, thereby driving the ball 44 to move from the first groove 421 to the second groove 422. Optionally, the preset angle is 90°. When the knob 34 drives the push rod 32 and the locking sleeve 42 to rotate by 90°, the push rod 32, due to the rotation of the thread, pushes the limiting sleeve 43 to move linearly along the axial direction by 1 / 4 of the thread pitch. At this time, the ball 44 moves spirally relative to the inner wall of the locking sleeve 42 and enters the second groove 422 from the first groove 421, so that the ball 44 is no longer restricted, thereby unlocking the locking rod 41 and the saw blade 5 from the locking assembly 4. When the knob 34 rotates the top rod 32 and the locking sleeve 42 in opposite directions by 90°, the locking rod 41 and the saw blade 5 can be reassembled.

[0056] In some embodiments, the outer peripheral surface of the end of the push rod 32 connected to the locking sleeve 42 is formed with a third plane P3, and the locking sleeve 42 further includes a through groove 423 sleeved on the outer periphery of the push rod 32, and the inner peripheral surface of the through groove 423 is formed with a fourth plane P4, and the third plane P3 and the fourth plane P4 are fitted together.

[0057] like Figure 5 As shown, the third plane P3 of the top rod 32 is fitted with the fourth plane P4 of the locking sleeve 42, which can prevent the locking sleeve 42 from rotating relative to the top rod 32 and ensure that the top rod 32 and the locking sleeve 42 can rotate synchronously. This makes it easy for the actuating component 3 to drive the locking sleeve 42 to rotate forward or backward through the top rod 32, so as to realize the disassembly or assembly of the locking rod 41 and the saw blade 5.

[0058] Figure 6 for Figure 1 The diagram shown is a partially enlarged structural diagram of the power tool. Figure 7 for Figure 6 A schematic diagram of the shift fork component.

[0059] In some embodiments, the power tool 100 further includes a motor 1 and an eccentric sleeve assembly 2. The motor 1 includes an output shaft 11 that rotates about its own axis. The eccentric sleeve assembly 2 is eccentrically disposed relative to the output shaft 11. The axial direction of the locking rod 41 is intersecting the axial direction of the output shaft 11. The actuating assembly 3 further includes a shift fork 31. The shift fork 31 includes a cylindrical portion 311 and a fork portion 312 connected to each other. The cylindrical portion 311 is sleeved on the outer periphery of a portion of the locking assembly 4. The fork portion 312 is connected to the end of the eccentric sleeve assembly 2 away from the output shaft 11. In the first state, the locking rod 41 and the shift fork 31 are connected as one unit. The motor 1 drives the shift fork 31 to reciprocate through the eccentric sleeve assembly 2 so that the locking rod 41 can drive the saw blade 5 to reciprocate about its own axis.

[0060] like Figure 6 and Figure 7 As shown, the motor 1 includes an output shaft 11 that rotates about its own axis. The axial direction of the locking rod 41 is perpendicular to the axial direction of the output shaft 11, so that the power tool 100 has a compact structure and occupies little space. The eccentric sleeve assembly 2 is eccentrically arranged relative to the output shaft 11. The fork portion 312 of the shift fork 31 of the actuating assembly 3 is connected to the end of the eccentric sleeve assembly 2 away from the output shaft 11, so that the motor 1 can transmit power to the locking assembly 4 through the eccentric sleeve assembly 2. Specifically, when the motor 1 rotates, the eccentric sleeve assembly 2 can drive the shift fork 31 to reciprocate in a plane perpendicular to the axial direction of the locking rod 41 via the fork portion 312. The cylindrical portion 311 of the shift fork 31 is sleeved on the outer periphery of part of the locking assembly 4, thereby driving the locking rod 41 and the saw blade 5 of the locking assembly 4 to reciprocate around their own axis to perform the operation. The size of the reciprocating swing angle range depends on the working angle required by the saw blade 5.

[0061] Figure 8 for Figure 6 Cross-sectional structural diagram of the eccentric sleeve assembly and the motor.

[0062] In some embodiments, the eccentric sleeve assembly 2 includes an eccentric sleeve 21, a positioning shaft 22, and a positioning bearing 23. The eccentric sleeve 21 is provided with a first hole 211 and a second hole 212 that are interconnected along its own axial direction. The central axis of the first hole 211 is eccentrically arranged relative to the central axis of the second hole 212. The output shaft 11 of the motor 1 extends into the first hole 211, the positioning shaft 22 extends into the second hole 212, and the positioning bearing 23 is disposed between the positioning shaft 22 and the fork 312.

[0063] like Figure 7 and Figure 8 As shown, the eccentric sleeve 21 is provided with a first hole 211 and a second hole 212 that are interconnected along its own axial direction. The central axis of the first hole 211 is eccentrically set relative to the central axis of the second hole 212. When the output shaft 11 of the motor 1 drives the eccentric sleeve 21 to rotate through the first hole 211, the positioning shaft 22 extending into the second hole 212 is rotatably connected to the fork 312 through the positioning bearing 23, so that the shift fork 31 can reciprocate.

[0064] In some embodiments, the power tool 100 further includes a first housing 6 and a second housing 7 connected to each other, with the motor 1 disposed in the first housing 6, and the eccentric sleeve assembly 2, the actuating assembly 3 and the locking assembly 4 disposed in the second housing 7 respectively.

[0065] like Figure 1 As shown, the first housing 6 and the second housing 7 are separately configured, which simplifies the manufacturing process and facilitates assembly. The first housing 6 and the second housing 7 are used to protect components such as the motor 1, the eccentric sleeve assembly 2, the actuating assembly 3, and the locking assembly 4 from dust, moisture, and other impurities.

[0066] In some embodiments, the second housing 7 includes a first cylindrical shell 71 and a second cylindrical shell 72 that are arranged intersectingly. The first cylindrical shell 71 is connected to the first housing 6. An eccentric sleeve assembly 2 is disposed inside the first cylindrical shell 71, and a fixed bearing 73 is disposed between the eccentric sleeve assembly 2 and the first cylindrical shell 71. An actuating assembly 3 and a locking assembly 4 are respectively disposed inside the second cylindrical shell 72, and a first bearing 35 is disposed between the actuating assembly 3 and the second cylindrical shell 72. A second bearing 48 is disposed between the locking assembly 4 and the second cylindrical shell 72.

[0067] like Figure 1 , Figure 2 and Figure 8As shown, the central axis of the first cylindrical shell 71 is perpendicular to the central axis of the second cylindrical shell 72. The eccentric sleeve assembly 2 is disposed inside the first cylindrical shell 71, and a fixed bearing 73 is provided between the eccentric sleeve assembly 2 and the first cylindrical shell 71 to allow the eccentric sleeve assembly 2 to rotate relative to the first cylindrical shell 71. The actuating assembly 3 and the locking assembly 4 are respectively disposed inside the second cylindrical shell 72. A first bearing 35 is provided between the actuating assembly 3 and the second cylindrical shell 72. At the same time, a first step is provided on the inner wall of the second cylindrical shell 72. One end of the first bearing 35 contacts the first step, and the other end contacts the first retaining ring 36. The first retaining ring 36 is used to restrict the axial movement of the first bearing 35 so that the actuating assembly 3 can rotate relative to the second cylindrical shell 72. A second bearing 48 is provided between the locking assembly 4 and the second cylindrical shell 72. A second step is provided on the inner wall of the second cylindrical shell 72. One end of the second bearing 48 contacts the second step, and the other end contacts the second retaining ring 49, so that the locking assembly 4 can rotate relative to the second cylindrical shell 72.

[0068] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power tool facilitating replacement of a saw blade, characterized in that, The electric tool comprises: a dialing assembly; a locking assembly coaxially arranged with the dialing assembly, the locking assembly comprising a locking rod, a locking sleeve, a limiting sleeve and a ball, a first end of the locking rod penetrating the limiting sleeve and being connected with the dialing assembly, the first end being provided with a first annular groove, the limiting sleeve being provided with an opening along a circumferential direction thereof, the ball being located between the first annular groove and the opening, the locking sleeve being sleeved on an outer periphery of the limiting sleeve, the locking sleeve being provided with a first recess and a second recess intersecting and communicating along a circumferential direction thereof, the first recess having a maximum outer diameter smaller than that of the second recess; and a saw blade connected with a second end of the locking rod away from the dialing assembly, in a first state, the ball is located in the first recess, and the locking rod can drive the saw blade to reciprocatingly swing about an axis thereof to perform work, and in a second state, the dialing assembly can drive the locking sleeve to rotate by a preset angle, so that the limiting sleeve moves along an axial direction of the locking rod by a preset distance, and the ball is driven to move from the first recess to the second recess, so that the locking rod and the saw blade are detached from the locking assembly.

2. The power tool of claim 1, wherein, The locking assembly further comprises a positioning sleeve and an elastic member, the positioning sleeve being sleeved on outer peripheries of the locking rod, the limiting sleeve and the locking sleeve, one end of the positioning sleeve being connected with the dialing assembly, and the elastic member being arranged between the other end of the positioning sleeve and the limiting sleeve.

3. The power tool of claim 2, wherein, The limiting sleeve further comprises a flange disc arranged along a circumferential direction thereof, the flange disc being in contact with an end face of the locking sleeve to form a cavity accommodating the ball; an outer peripheral surface of the flange disc is formed with a first plane corresponding to one side of the opening, and an inner peripheral surface of the positioning sleeve is provided with a second plane, the first plane and the second plane being arranged in abutment in the second state.

4. The power tool of claim 1, wherein, The first end of the locking rod is further provided with a second annular groove located on one side of the first annular groove toward the second end, and a anti-disengagement member is arranged between the second annular groove and the limiting sleeve.

5. The power tool of claim 1, wherein, The dialing assembly comprises a top rod and a sleeve member, the sleeve member being sleeved on an outer periphery of the top rod and being threadedly connected with the top rod, one end of the top rod protruding from the sleeve member being provided with a knob, and the other end of the top rod being connected with the locking sleeve, so that the dialing assembly drives the locking sleeve to rotate by a preset angle through the top rod.

6. The power tool of claim 5, wherein, An outer peripheral surface of the one end of the top rod connected with the locking sleeve is formed with a third plane, the locking sleeve further comprising a through groove sleeved on an outer periphery of the top rod, an inner peripheral surface of the through groove being formed with a fourth plane, and the third plane and the fourth plane being arranged in abutment.

7. The power tool of any one of claims 1 to 6, wherein, The electric tool further comprises a motor and an eccentric sleeve assembly, the motor comprising an output shaft rotating about an axial direction thereof, the eccentric sleeve assembly being arranged eccentrically relative to the output shaft, and an axial direction of the locking rod being arranged intersectingly with an axial direction of the output shaft. The dialing assembly further comprises a fork member, the fork member comprises a cylinder portion and a fork portion connected with each other, the cylinder portion is sleeved on the outer periphery of part of the locking assembly, and the fork portion is connected with one end of the eccentric sleeve assembly away from the output shaft; in the first state, the locking rod is connected with the fork member as a whole, and the motor drives the fork member to reciprocate through the eccentric sleeve assembly, so that the locking rod can drive the saw blade to reciprocate around the axis of the saw blade.

8. The power tool of claim 7, wherein, The eccentric sleeve assembly comprises an eccentric sleeve, a positioning shaft and a positioning bearing, the eccentric sleeve is provided with a first hole and a second hole which are communicated with each other along the axis of the eccentric sleeve, and the center axis of the first hole is eccentrically arranged relative to the center axis of the second hole; the output shaft of the motor extends into the first hole, the positioning shaft extends into the second hole, and the positioning bearing is arranged between the positioning shaft and the fork portion.

9. The power tool of claim 7, wherein, The electric tool further comprises a first housing and a second housing connected with each other, the motor is arranged in the first housing, and the eccentric sleeve assembly, the dialing assembly and the locking assembly are arranged in the second housing respectively.

10. The power tool of claim 9, wherein, The second housing comprises a first cylinder shell and a second cylinder shell intersected with each other, the first cylinder shell is connected with the first housing, the eccentric sleeve assembly is arranged in the first cylinder shell, and a fixed bearing is arranged between the eccentric sleeve assembly and the first cylinder shell; the dialing assembly and the locking assembly are arranged in the second cylinder shell respectively, a first bearing is arranged between the dialing assembly and the second cylinder shell, and a second bearing is arranged between the locking assembly and the second cylinder shell.

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