Reciprocating cutting tool

Abstract

A reciprocating cutting tool. The reciprocating cutting tool comprises a housing assembly, a driving assembly and a transmission assembly, wherein the driving assembly comprises an electric motor, the electric motor being at least partially located in a holding region formed by the housing assembly; the transmission assembly is configured to convert a rotational input, which is provided by an output shaft of the electric motor, to a reciprocating output of a reciprocating member along a reciprocating axis; and the transmission assembly comprises a transmission member and an eccentric rotating shaft, the transmission member being configured to be capable of meshing with an output end of the electric motor, transmitting the rotational input of the electric motor to the reciprocating member and driving the reciprocating member to perform a reciprocating motion, and the eccentric rotating shaft being configured to rotate along with the transmission member. Compared with a pneumatic tool, the reciprocating cutting tool, by adopting the electric motor as a power source for the reciprocating member, requires no external compressed air, such that the usage scenarios are more diverse and the use is more convenient. In addition, the transmission assembly comprises a balance block, and the eccentric rotating shaft rotating along with the transmission member, thereby helping to reduce vibration and helping to improve the use experience of a user.

Description

Reciprocating cutting tools

[0001] This application claims priority to Chinese Patent Application No. 202411812912.9, filed on December 10, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to a power tool, such as a reciprocating cutting tool. Background Technology

[0003] One type of power tool in the related technology is the reciprocating saw. Most existing small reciprocating saws for auto repair are pneumatically driven, which requires additional configuration such as pipes and connectors to provide compressed air. This makes assembly cumbersome and causes significant vibration during use, making it increasingly unable to meet users' requirements.

[0004] This section provides background information related to this application, which is not necessarily prior art. Summary of the Invention

[0005] One objective of this application is to solve or at least alleviate some or all of the aforementioned problems. To this end, one objective of this application is to provide a reciprocating cutting tool that is not only small in overall size, suitable for operation in confined spaces, but also exhibits low vibration and a good user experience.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] A reciprocating cutting tool includes: a housing assembly including a grip portion having a grip area for gripping by an operator's hand; a drive assembly including a motor at least partially located within the grip area; and a transmission assembly configured to convert a rotational input provided by the output shaft of the motor into a reciprocating output of a reciprocating component along a reciprocating axis; the transmission assembly includes: a transmission member configured to engage with the output end of the motor to transmit the rotational input of the motor to the reciprocating component and drive the reciprocating component to perform reciprocating motion; and an eccentric rotating shaft configured to rotate with the transmission member.

[0008] A reciprocating cutting tool includes: a housing assembly; a drive assembly including a motor; and a transmission assembly configured to convert a rotational input provided by the output shaft of the motor into a reciprocating output of a reciprocating component along a reciprocating axis; the transmission assembly includes: a transmission member configured to engage with the output end of the motor to transmit the rotational input of the motor to the reciprocating component and drive the reciprocating component to perform reciprocating motion; and an eccentric rotating shaft configured to rotate with the transmission member.

[0009] In some embodiments, the transmission assembly further includes a balance block, which is configured to reciprocate under the drive of the eccentric shaft to balance the vibration of the reciprocating component.

[0010] In some embodiments, the transmission element includes an eccentric transmission wheel.

[0011] In some embodiments, the eccentric drive wheel includes a drive wheel and a first eccentric portion; the drive wheel can mesh with the output end of the motor to rotate with the rotation of the motor; the first eccentric portion is connected to the reciprocating member to drive the reciprocating member to perform reciprocating motion.

[0012] In some embodiments, the reciprocating cutting tool further includes a guide bearing configured to at least support the reciprocating member and guide the reciprocating motion of the reciprocating member.

[0013] In some embodiments, the eccentric shaft includes a shaft and a second eccentric portion; the shaft is connected to the transmission member to rotate with the transmission member; the second eccentric portion is connected to the balance block to drive the balance block to reciprocate.

[0014] In some embodiments, the rotating shaft and the second eccentric portion are integrally formed.

[0015] In some embodiments, the rotating shaft and the second eccentric portion are detachably assembled to form the eccentric rotating shaft.

[0016] In some embodiments, the axis of the rotating shaft is substantially perpendicular to the output shaft of the motor.

[0017] In some embodiments, the minimum vertical distance D1 between the balance block and the reciprocating component is greater than or equal to 0 and less than or equal to 8 mm.

[0018] In some embodiments, the center of gravity G of the cutting tool is located above the bottom end face of the balance block.

[0019] A reciprocating cutting tool includes: a housing assembly; a drive assembly including a motor; and a transmission assembly configured to convert a rotary input provided by the output shaft of the motor into a reciprocating output of a reciprocating component along a reciprocating axis; the transmission assembly includes: a counterweight configured to balance reciprocating vibrations during the process of the transmission assembly converting the rotary input into the reciprocating output; and a transmission housing configured to house the transmission assembly; in a first direction, the ratio of the length L1 of the transmission housing to the length L2 of the housing assembly is greater than or equal to 0.3 and less than or equal to 0.6.

[0020] In some embodiments, the housing assembly includes a grip portion having a grip area that can be gripped by an operator's hand; the motor is at least partially located within the grip area.

[0021] In some embodiments, the minimum vertical distance D1 between the balance block and the reciprocating component is greater than or equal to 0 and less than or equal to 8 mm.

[0022] In some embodiments, the angle between the axis of the motor and the reciprocating axis is greater than or equal to 0° and less than or equal to 90°. Attached Figure Description

[0023] Figure 1 is a schematic diagram of the reciprocating cutting tool after removing part of the housing components;

[0024] Figure 2 is a longitudinal sectional view of the transmission assembly;

[0025] Figure 3 is a schematic diagram of the reciprocating cutting tool after removing part of the housing components and part of the transmission housing;

[0026] Figure 4 is a cross-sectional view of the forward-mounted transmission assembly of the reciprocating cutting tool;

[0027] Figure 5 is a cross-sectional view of the inverted transmission assembly of the reciprocating cutting tool;

[0028] Figure 6 is an exploded view of part of the reciprocating cutting tool structure;

[0029] Figure 7 is a top view of the structure of the reciprocating cutting tool;

[0030] Figure 8 is a schematic diagram of some of the housing components and support components;

[0031] Figure 9 is a front view of the support assembly;

[0032] Figure 10 is a bottom view of the support assembly;

[0033] Figure 11 is a top view of the support assembly;

[0034] Figures 12a and 12b are schematic diagrams of the reciprocating cutting tool in one embodiment;

[0035] Figures 13a and 13b are schematic diagrams of the reciprocating cutting tool in another embodiment;

[0036] Figure 14 is a schematic diagram of the reciprocating cutting tool in another embodiment.

[0037] 100. Housing assembly; 101. Grip part; 1011. Grip area; 110. Battery mounting part; 120. Limiting plate;

[0038] 200. Drive assembly; 210. Motor; 220. Signal switch; 230. Trigger; 240. Second gear; 250. Fan;

[0039] 300. Transmission assembly; 310. Transmission component; 311. Transmission wheel; 312. First eccentric part; 320. Eccentric shaft; 321. Shaft; 322. Second eccentric part; 330. Balance block; 331. Guide groove; 332. Second elongated hole; 340. Guide bearing; 341. Bearing body; 3411. Guide hole; 342. Balance guide part; 350. Transmission housing; 361. Support bearing; 362. Pad; 363. Shim; 364. Block; 365. Guide pin;

[0040] 400. Reciprocating part; 410. Mating part; 411. First elongated hole; 420. Guide connection part;

[0041] 500. Clamping component; 510. Chuck body; 520. Chuck bushing; 530. Limiting post;

[0042] 600, Support base assembly; 610, Support frame; 611, Slot; 612, Crossbar; 613, Diagonal bar; 614, Arc-shaped connecting rod; 620, Base body; 630, Push plate; 640, Button; 650, Elastic element;

[0043] 700, LED lights;

[0044] 800, capacitor;

[0045] 900, PCB assembly;

[0046] 10. Workpieces;

[0047] 1000, Battery pack; 1001, Mounting surface. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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 ​​that do not use 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.

[0053] 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.

[0054] 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.

[0055] As shown in Figures 1 to 5, this application provides a reciprocating cutting tool that can output reciprocating motion and can be connected to a workpiece 10. The reciprocating cutting tool cuts the workpiece by driving the workpiece 10 to reciprocate. Optionally, the reciprocating cutting tool is a reciprocating saw, and the workpiece 10 is a saw blade.

[0056] Specifically, the reciprocating cutting tool includes a housing assembly 100, a drive assembly 200, and a transmission assembly 300. The housing assembly 100 is configured to provide mounting space, and both the drive assembly 200 and the transmission assembly 300 are mounted within the housing assembly 100. The drive assembly 200 includes a motor 210, which includes an output shaft. In one embodiment, the central axis of the output shaft extends along a first straight line. The transmission assembly 300 is configured to drively connect the output shaft of the motor 210 to the reciprocating member 400. The transmission assembly 300 is configured to convert the rotational input provided by the output shaft of the motor 210 into a reciprocating output of the reciprocating member 400 along a reciprocating axis. The reciprocating member 400 is configured to output reciprocating motion and drive the workpiece 10 to perform a cutting operation. The transmission assembly 300 specifically includes a transmission component 310 and an eccentric rotating shaft 320. The transmission component 310 is configured to mesh with the output end of the motor 210, transmit the rotational input of the motor 210 to the reciprocating component 400, and drive the reciprocating component 400 to perform reciprocating motion. The eccentric rotating shaft 320 is configured to rotate with the transmission component 310.

[0057] Compared to existing pneumatically driven reciprocating saws, the reciprocating cutting tool provided in this application uses a motor 210 as the power source for the reciprocating component 400. The motor 210 drive eliminates the need for pipes and connectors required for compressed air output as in pneumatic drives, thus freeing it from limitations related to compressed air and pipes, and broadening its application scenarios. Furthermore, the transmission assembly 300 includes an eccentric shaft 320 that rotates with the transmission component 310. As the transmission component 310 rotates, the eccentric shaft 320 rotates accordingly. This eccentric rotation of the eccentric shaft 320 can balance some of the vibrations generated by the reciprocating movement of the reciprocating component 400, reducing vibration and improving the user experience.

[0058] In some embodiments, the housing assembly 100 is an integral structure; in other embodiments, the housing assembly 100 includes a plurality of housings that are separately arranged and detachably connected. For example, in a specific embodiment, the housing assembly 100 includes an upper housing and a lower housing that are separately arranged up and down; in another specific embodiment, the housing assembly 100 includes a left housing and a right housing that are separately arranged left and right; in yet another specific embodiment, the housing assembly 100 includes a front housing and a rear housing that are separately arranged front and rear.

[0059] In some embodiments, the housing assembly 100 is generally in the shape of a Chinese character "one" and extends in a cylindrical shape along the first direction to facilitate user grip. In one embodiment, the extension direction of the housing assembly 100 may be substantially the same as the extension direction of the axis of the motor 210. In some embodiments, a part of the structure of the housing assembly 100 contracts inwardly, so that the housing assembly 100 forms a structure with inconsistent radial dimensions in its extension direction to further facilitate user grip.

[0060] Continuing to refer to FIG. 4, a through hole for the reciprocating member 400 to pass through is formed at the front end of the housing assembly 100, and a limiting plate 120 is installed in the through hole, and the working member 10 is arranged through the limiting plate 120.

[0061] To improve the visual environment when the user operates the reciprocating cutting tool, continuing to refer to FIG. 1, the reciprocating cutting tool further includes an LED lamp 700. The LED lamp 700 is fixed at the front end of the housing assembly 100, and the light emitted by the LED lamp 700 can illuminate the working area of the working member 10, thereby improving the visual environment.

[0062] Continuing to refer to FIG. 1, a battery installation part 110 is provided at the rear end of the housing assembly 100. The battery installation part 110 is configured to install a battery pack 1000, and the battery pack 1000 is configured to supply power to the motor 210. Optionally, the battery pack 1000 is detachably connected to the battery installation part 110, and the detachable connection methods include but are not limited to magnetic attraction, plugging, etc. In some embodiments, the rated voltage of the battery pack is greater than or equal to 8V. For example, the rated voltage of the battery pack can be 8V, 12V, 16V, 20V, etc.

[0063] In some embodiments, as shown in Figures 12a and 12b, after the battery pack 1000 is installed onto the battery mounting portion 110, except for the mounting surface 1001 where the battery connection terminals are located, which is covered by the battery mounting portion 110, the other surfaces of the battery pack 1000 are exposed or mostly exposed outside the tool. In one embodiment, the mounting direction of the battery pack 1000 is substantially perpendicular to the extending direction of the housing assembly 100, or in other words, the insertion direction of the battery connection terminals on the battery pack 1000 is substantially perpendicular to the extending direction of the housing assembly 100. In some embodiments, the battery connection terminals are configured as insert-type connection terminals, capable of electrical coupling with corresponding tool terminals on the battery mounting portion 110.

[0064] In some embodiments, as shown in Figures 13a and 13b, the battery pack 1000 can be built into the tool. Exemplarily, the battery pack 1000 is configured as a cylindrical structure, the outer contour of which is smaller than the inner diameter of the receiving cavity formed by the housing assembly 100, thereby allowing the battery pack 1000 to be inserted into the housing assembly 100. In one embodiment, the mounting direction of the battery pack 1000 is substantially consistent with the extending direction of the housing assembly 100, or in other words, the insertion direction of the battery connection terminals is substantially consistent with the extending direction of the housing assembly 100.

[0065] In some embodiments, the motor 210 is a DC motor, and further, the motor 210 is a brushless internal rotor motor. To achieve power-on control of the motor 210, referring to FIG1, the drive assembly 200 also includes a trigger 230 and a signal switch 220. The trigger 230 is rotatably connected to the outside of the housing assembly 100, and the signal switch 220 is fixed to the housing assembly 100. By pulling the trigger 230, it can be made to contact the signal switch 220 to trigger the signal switch 220. After the signal switch 220 is triggered, it can control the motor 210 to be powered on. Stopping to pull the trigger 230 will deactivate the trigger on the signal switch 220, thus de-energizing the motor 210.

[0066] Referring again to Figure 1, the housing assembly 100 also includes a capacitor 800 and a PCB assembly 900. Both the PCB assembly 900 and the capacitor 800 are electrically connected to the battery pack. The PCB assembly 900 can receive power-on and power-off signals from the signal switch 220, thereby controlling the power-on and power-off of the motor 210. Furthermore, the housing assembly 100 is equipped with a detachable hex wrench, which allows for maintenance of the reciprocating cutting tool.

[0067] The transmission assembly 300 also includes a transmission housing 350, which is configured to house the transmission assembly 300. The transmission component 310 and the eccentric shaft 320 are both disposed within the transmission housing 350, and the transmission housing 350 is fixed within the housing assembly 100.

[0068] In some embodiments, the motor 210 is disposed within the housing assembly 100 between the battery mounting portion 110 and the transmission assembly 300. That is, the motor 210 is located at the front end of the battery mounting portion 110 and at the rear end of the transmission assembly 300.

[0069] In this embodiment, the housing assembly 100 forms a grip portion 101 for a user to hold, and the grip portion 101 has a grip area 1011 that can be gripped by the operator's hand. In this embodiment, the grip area 1011 is basically configured as the housing assembly 100 between the battery mounting portion 110 and the transmission assembly 300. In other words, the motor 210 is disposed within the grip area 1011, or at least a portion of the motor 210 is located within the grip area 1011. In some embodiments, the output axis of the motor 210 has an angle with the extending direction of the main body of the housing assembly 100, which is greater than 0° and less than or equal to 90°. The main body of the housing assembly 100 can be understood as the portion that houses the transmission assembly 300. As shown in FIG14, the angle between the output axis A of the motor 210 and the extending direction B of the main body of the housing assembly 100 is θ, where 0° < θ ≤ 90°. That is, in this embodiment, the axis of the rotating shaft 321 is substantially parallel to the output axis of the motor 210. It can also be understood that the angle between the output axis of motor 210 and the reciprocating axis can be an acute angle.

[0070] In some embodiments, FIG2 is a cross-sectional view of the transmission housing 350 in a direction perpendicular to the second direction, the cross-sectional view having a maximum width W. W is greater than or equal to 55 mm and less than or equal to 70 mm.

[0071] In some embodiments, continuing to refer to FIG1, in the first direction, the length of the transmission housing 350 is L1, that is, the distance between the nearest and farthest ends of the transmission housing 350 is L1. L1 is greater than or equal to 90 mm and less than or equal to 110 mm. In a specific embodiment, L1 is 100 mm. In one embodiment, the length of the housing assembly 100 in the first direction is L2, and the ratio of L1 to L2 is greater than or equal to 0.3 and less than or equal to 0.6. For example, the ratio of L1 to L2 is 0.3, 0.4, 0.5, 0.6, etc. In this embodiment, the first direction is set as the axial direction of the motor or the length direction of the working part 10.

[0072] In some embodiments, the transmission component 310 includes an eccentric transmission wheel, which is configured to connect the output end of the motor 210 and the reciprocating component 400. Under the drive of the motor 210, the eccentric transmission wheel performs eccentric rotational motion. The eccentric transmission wheel and the reciprocating component 400 cooperate to convert the eccentric rotational motion into linear reciprocating motion.

[0073] Referring to Figures 4 to 6, in some embodiments, the eccentric drive wheel includes a drive wheel 311 and a first eccentric part 312. The drive wheel 311 can mesh with the output end of the motor 210 to rotate with the rotation of the motor 210. The first eccentric part 312 is connected to the reciprocating member 400 to drive the reciprocating member 400 to perform reciprocating motion.

[0074] Optionally, both the transmission wheel 311 and the first eccentric part 312 are disc-shaped, and the central axis of the transmission wheel 311 and the central axis of the first eccentric part 312 are parallel and spaced apart. The transmission wheel 311 is configured to cooperate with the output end of the motor 210, and the first eccentric part 312 is configured to cooperate with the reciprocating part 400.

[0075] In one embodiment, the transmission wheel 311 is a first gear, and a second gear 240 is sleeved on the output shaft of the motor 210, forming the output end of the motor 210. The first gear and the second gear 240 mesh to realize gear transmission between the transmission component 310 and the output end of the motor 210. The gear transmission structure is compact and occupies little space. Optionally, both the first gear and the second gear 240 are bevel gears, and the central axis of the first gear and the central axis of the second gear 240 are perpendicular to each other. This arrangement makes the structure compact and facilitates further miniaturization.

[0076] It should be further explained that when using gear transmission, the transmission housing 350 is the gearbox, which includes a gearbox body and a gearbox cover, with the gearbox cover covering the opening of the gearbox body. Of course, besides using gear transmission, by properly arranging the motor 210, the motor shaft of the motor 210 can also directly drive the transmission component 310 to achieve rotation.

[0077] To achieve cooperation with the first eccentric portion 312, the reciprocating member 400 includes a mating portion 410, on which a first elongated hole 411 is formed. The disc-shaped first eccentric portion 312 is placed within the first elongated hole 411. The first elongated hole 411 includes two opposing sidewalls, both of which abut against the first eccentric portion 312. As the first eccentric portion 312 rotates, under the limiting structure, the first eccentric portion 312 can drive the reciprocating member 400 to reciprocate along a second straight line. Optionally, the second straight line is parallel to the first straight line. Optionally, the first elongated hole 411 is an oblong hole.

[0078] Referring again to Figure 6, the reciprocating component 400 further includes a guide connecting portion 420, one end of which is connected to the mating portion 410, and the other end is configured to connect to the working component 10. Optionally, the guide connecting portion 420 is an elongated structure extending along a second straight line. Optionally, the mating portion 410 has an oblong shape, making the reciprocating component 400 a reciprocating rod that is approximately "key" shaped.

[0079] Referring again to FIG6, in some embodiments, the reciprocating cutting tool further includes a guide bearing 340, which is the aforementioned limiting structure. The guide bearing 340 is configured to at least support the reciprocating member 400 and provide guidance for the reciprocating motion of the reciprocating member 400.

[0080] Optionally, the guide bearing 340 is fixed inside the transmission housing 350, and the front end of the transmission housing 350 has an opening through which the guide connection portion 420 of the reciprocating component 400 passes. Optionally, the guide bearing 340 has a block structure, and a guide hole 3411 is provided through the guide bearing 340, through which the guide connection portion 420 of the reciprocating component 400 passes. Optionally, a blocking block 364 is also provided at the front end of the guide bearing 340, through which the guide connection portion 420 passes. Optionally, the blocking block 364 is a felt block.

[0081] Referring again to Figures 3 to 6, in some embodiments, the reciprocating cutting tool further includes a clamping member 500. The clamping member 500 is disposed at the output end of the reciprocating member 400 to clamp the workpiece 10 and facilitate the disassembly of the workpiece 10. Optionally, the clamping member 500 includes a chuck body 510 and a chuck bushing 520. The chuck body 510 includes two opposing chucks forming a gap between them. The gap is configured to clamp the end of the workpiece 10. The chuck bushing 520 is sleeved outside the chuck body 510 and abuts against the upper and lower edges of the workpiece 10, stably holding the workpiece 10 within the chuck bushing 520 to ensure the stability of the workpiece 10. In one embodiment, the chuck body 510 is a single piece, with the workpiece 10 inserted into the chuck body 510 along its extension direction. The chuck bushing 520 is sleeved on the chuck body 510 to further secure the installation of the workpiece 10.

[0082] The clamping member 500 also includes a fastener 530, which has a first hole through the chuck body 510 and a second hole through the chuck bushing 520. The fastener 530 can be inserted into the first hole and the second hole to clamp and fix the workpiece 10 in the chuck body 510.

[0083] In some embodiments, the clamping member 500 and the reciprocating member 400 are arranged parallel to each other and not coplanar, that is, there is a height difference between the central axis of the clamping member 500 and the central axis of the reciprocating member 400. In one embodiment, the clamping member 500 and the reciprocating member 400 may also be arranged coplanarly, that is, the central axis of the clamping member 500 and the central axis of the reciprocating member 400 are substantially the same straight line.

[0084] To improve the vibration reduction effect, referring to Figures 1 to 6, in some embodiments, the transmission assembly 300 further includes a balance block 330, which is configured to be driven by the eccentric rotating shaft 320 to reciprocate, so as to balance the vibration of the reciprocating member 400.

[0085] In some embodiments, a balance guide portion 342 is provided on the guide bearing 340, which is configured to guide the reciprocating motion of the balance block 330. Optionally, the balance guide portion 342 is a guide block protruding from the bearing body portion 341 of the guide bearing 340, and a guide groove 331 is provided on the balance block 330. The guide block and the guide groove 331 are slidably engaged, and the guide groove 331 moves along the guide block during the reciprocating movement of the balance block 330. Of course, the positions of the guide block and the guide groove 331 can also be interchanged, that is, the guide block is provided on the balance block 330, and the balance guide portion 342 is the guide groove 331 protruding from the bearing body portion 341 that leads to the bearing.

[0086] Furthermore, to improve the reciprocating accuracy of the balance block 330, as shown in Figure 7, the reciprocating cutting tool also includes multiple guide pins 365. These guide pins 365 are divided into two groups, with each group abutting against the opposite sidewalls of the balance block 330. The multiple guide pins 365 restrict the movement of the balance block 330 in a direction perpendicular to its reciprocating motion.

[0087] In some embodiments, the eccentric shaft 320 includes a shaft 321 and a second eccentric portion 322. The shaft 321 is connected to an eccentric drive wheel to rotate with it, and the second eccentric portion 322 is connected to a balance block 330 to drive the balance block 330 to reciprocate. In one embodiment, the shaft 321 and the second eccentric portion 322 are integrally formed to form the eccentric shaft 320. In another embodiment, the shaft 321 and the second eccentric portion 322 are detachably assembled to form the eccentric shaft 320.

[0088] In one embodiment, a second elongated hole 332 is provided on the balance block 330, and a second eccentric portion 322 is disposed within the second elongated hole 332. The second elongated hole 332 includes two opposing sidewalls, both of which abut against the second eccentric portion 322. As the second eccentric portion 322 rotates, and under the limiting action of the guide pin 365 and the guiding action of the guide block, the second eccentric portion 322 can drive the balance block 330 to reciprocate along a second straight line. The movement direction of the balance block 330 is opposite to that of the reciprocating member 400, thus canceling vibration. Optionally, the second elongated hole 332 is an oblong hole.

[0089] Furthermore, it should be noted that the transmission assembly 300 can be installed upright or inverted when the user is operating the reciprocating cutting motion. As shown in Figure 4, upright installation means that the eccentric shaft 320 is installed in the transmission housing 350 with the shaft 321 positioned above the second eccentric portion 322. As shown in Figure 5, inverted installation means that the eccentric shaft 320 is installed in the transmission housing 350 with the shaft 321 positioned below the second eccentric portion 322. Of course, the positions of other components within the transmission assembly 300 will be adjusted accordingly.

[0090] Referring again to Figures 2 and 6, the reciprocating cutting tool further includes a support bearing 361 and a pad 362. The support bearing 361 is fixed to the gearbox body, the rotating shaft 321 passes through the support bearing 361, and the pad 362 is sandwiched between the support bearing 361 and the drive wheel 311. The reciprocating cutting tool also includes a shim 363, which is sleeved on the rotating shaft 321 and sandwiched between the second eccentric part 322 and the first eccentric part 312.

[0091] In some embodiments, the axis of the rotating shaft 321 is substantially perpendicular to the output shaft of the motor 210. In some embodiments, the angle between the axis of the rotating shaft 321 and the output shaft of the motor 210 is greater than or equal to 0° and less than or equal to 90°.

[0092] In some embodiments, continuing to refer to FIG3, the minimum vertical distance between the balance block 330 and the reciprocating member 400 is D1, where D1 is greater than or equal to 0 and less than or equal to 8 mm. For example, D1 can be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, etc. Continuing to refer to FIG4, in the axial direction of the rotating shaft 321, the distance between the center line of the clamping member 500 and the center line of the reciprocating member 400 is D2, where D2 is greater than or equal to 2 mm and less than or equal to 15 mm. For example, D2 can be 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, etc.

[0093] As shown in Figures 1, 8 to 11, in order to improve the stability of the reciprocating movement of the workpiece 10, the reciprocating cutting tool also includes a support base assembly 600. The support base assembly 600 includes a support frame 610, one end of which is fixed on the base body 620, and the other end can support the workpiece 10 from bottom to top.

[0094] In some embodiments, the support frame 610 is an L-shaped bracket formed by bending steel bars, comprising two horizontal bars 612 extending along a first direction and arranged opposite each other, two diagonal bars 613 extending obliquely relative to the first direction and arranged opposite each other, and three arc-shaped connecting rods 614. Specifically, one horizontal bar 612, the first arc-shaped connecting rod 614, one horizontal bar 612, the second arc-shaped connecting rod 614, the other diagonal bar 613, the third arc-shaped connecting rod 614, and the other horizontal bar 612 are connected sequentially. The free ends of both horizontal bars 612 are connected to the base 620. Of course, the support frame 610 can also have other shapes and is not limited to the L-shaped bracket described above.

[0095] In some embodiments, to enable the support bracket 610 to have adjustable support positions in the moving direction of the working piece 10, allowing the support bracket 610 to support different parts of the working piece 10 to accommodate working pieces 10 of different lengths, and to improve support stability and flexibility, the support base assembly 600 further includes a base body 620 and a push plate 630. The base body 620 has through holes for the crossbar 612 of the support bracket 610 to pass through. Multiple slots 611 are spaced apart at the ends of the crossbar 612. The push plate 630 has engaging protrusions and is movably mounted on the base body 620. A slide rail communicating with the through hole is provided on the base body 620, and the engaging protrusions are confined within the slide rail. By moving the crossbar 612, different slots 611 can be moved to positions directly opposite the slide rail. The engaging protrusions pass through the slide rail and engage with the corresponding slots 611, thereby fixing the support bracket 610.

[0096] To facilitate the movement of the push plate 630, the support assembly 600 also includes a button 640. The button 640 is fixed to the push plate 630 and is movably mounted on the housing assembly 100. Pressing the button 640 moves the push plate 630. The support assembly 600 also includes an elastic element 650, which is connected between the seat body 620 and the inner wall of the housing assembly 100. Pressing the push plate 630 compresses the elastic element 650, causing the locking protrusion to be misaligned with the through hole, allowing the crossbar 612 to move freely within the through hole. If the push plate 630 is not pressed, the push plate 630 can be reset under the drive of the elastic element 650, and the locking protrusion can be reset to the through hole and engage with the slot 611. At this time, the crossbar 612 is fixed and cannot move. This operation allows for the adjustment of the extension length of the support frame 610.

[0097] Optionally, the elastic element 650 is a helical spring. Optionally, the push plate 630 includes a snap-fit ​​portion, and the button 640 includes two opposing snap-fit ​​plates, with the snap-fit ​​portion snapping between the two snap-fit ​​plates.

[0098] In some embodiments, the overall center of gravity G of the machine is located between the output axis of the motor 210 and the bottom end face of the balance block 330. The bottom end face of the balance block 330 can be understood as an end face of the balance block 330 away from the motor axis. For example, referring to FIG4, when the transmission assembly 300 is mounted upright, the overall center of gravity G of the cutting tool is located between the output axis of the motor 210 and the lower end face of the balance block 330. Referring to FIG5, when the transmission assembly 300 is mounted upside down, the overall center of gravity G is located between the output axis of the motor 210 and the upper end face of the balance block 330.

[0099] In some embodiments, the center of gravity G of the cutting tool is located above the lower end face of the balance block 330.

[0100] In some embodiments, a heat dissipation vent is provided on the housing assembly 100 located between the motor 210 and the transmission housing 350. Cooling airflow enters from the battery mounting portion 110, passes through the motor 210, and exits from the heat dissipation vent. Optionally, multiple heat dissipation vents are provided, spaced apart, to improve heat dissipation. Optionally, air inlets are provided on both sides of the battery mounting portion 110; by providing multiple air inlets, the airflow can be increased, further improving the heat dissipation effect.

[0101] In some embodiments, at least one air outlet is provided on the housing assembly 100 along the axial direction of the fan 250. In one embodiment, at least one air outlet is provided on the housing assembly 100 on the periphery of the drive housing 350. In one embodiment, at least one air inlet is provided on the housing assembly 100 along the rear circumferential direction of the motor 210; for example, an air inlet may be provided at the battery pack mounting location.

[0102] In summary, the reciprocating cutting tool provided in this application, by employing a DC motor, gear transmission, and adding a balance block 330, enhances overall machine performance without significantly increasing the overall size and weight. Furthermore, the eccentric transmission wheel driven by the motor 210 rotates, thereby driving the reciprocating component 400 to reciprocate, which in turn drives the workpiece 10 to reciprocate and cut. During this process, the rotating shaft 321 drives the balance block 330 to reciprocate, achieving a vibration-balancing effect, reducing the user's vibration sensation and improving the user's operating feel.

[0103] 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. A reciprocating cutting tool, wherein, include: Housing assembly (100); The drive assembly (200) includes a motor (210); The transmission assembly (300) is configured to convert the rotary input provided by the output shaft of the motor (210) into the reciprocating output of the reciprocating member (400) along the reciprocating axis; The transmission assembly (300) includes: The transmission component (310) is configured to engage with the output end of the motor (210) to transmit the rotational input of the motor (210) to the reciprocating component (400) and drive the reciprocating component (400) to perform reciprocating motion; An eccentric shaft (320) is configured to rotate with the transmission member (310).

2. The reciprocating cutting tool according to claim 1, wherein, The housing assembly (100) includes a grip (101) having a grip area (1011) that can be gripped by an operator's hand; the motor (210) is at least partially located within the grip area (1011).

3. The reciprocating cutting tool according to claim 1, wherein, The transmission component (310) includes an eccentric transmission wheel.

4. The reciprocating cutting tool according to claim 3, wherein, The eccentric drive wheel includes a drive wheel (311) and a first eccentric part (312); the drive wheel (311) can mesh with the output end of the motor (210) to rotate with the rotation of the motor (210); The first eccentric part (312) is connected to the reciprocating member (400) to drive the reciprocating member (400) to perform reciprocating motion.

5. The reciprocating cutting tool according to claim 1, wherein, The reciprocating cutting tool also includes a guide bearing (340) configured to at least support the reciprocating member (400) and guide the reciprocating motion of the reciprocating member (400).

6. The reciprocating cutting tool according to claim 1, wherein, The eccentric shaft (320) includes a shaft (321) and a second eccentric part (322); the shaft (321) is connected to the transmission member (310) to rotate with the transmission member (310); the second eccentric part (322) is connected to the balance block (330) to drive the balance block (330) to reciprocate.

7. The reciprocating cutting tool according to claim 6, wherein, The rotating shaft (321) and the second eccentric part (322) are integrally formed.

8. The reciprocating cutting tool according to claim 6, wherein, The rotating shaft (321) and the second eccentric part (322) can be detachably assembled to form the eccentric rotating shaft (320).

9. The reciprocating cutting tool according to claim 6, wherein, The axis of the rotating shaft (321) is substantially perpendicular to the output shaft of the motor (210).

10. The reciprocating cutting tool according to claim 1, wherein, The transmission assembly (300) also includes a balance block (330), which is configured to be driven by the eccentric rotating shaft (320) to reciprocate in order to balance the vibration of the reciprocating component (400).

11. The reciprocating cutting tool according to claim 10, wherein, The minimum vertical distance D1 between the balance block (330) and the reciprocating component (400) is greater than or equal to 0 and less than or equal to 8 mm.

12. The reciprocating cutting tool according to claim 10, wherein, The center of gravity G of the cutting tool is located above the bottom end face of the balance block (330).

13. The reciprocating cutting tool according to claim 1, wherein, The transmission assembly (300) further includes a transmission housing (350); in a first direction, the ratio of the length L1 of the transmission housing (350) to the length L2 of the housing assembly (100) is greater than or equal to 0.3 and less than or equal to 0.

6.

14. [Correction 04.03.2026 based on Rule 91] The reciprocating cutting tool according to claim 1, wherein, The angle between the axis of the motor and the reciprocating axis is greater than or equal to 0° and less than or equal to 90°.

15. [Corrected according to Rule 91, 04.03.2026] A reciprocating cutting tool, wherein, include: Housing assembly (100); The drive assembly (200) includes a motor (210); The transmission assembly (300) is configured to convert the rotary input provided by the output shaft of the motor (210) into the reciprocating output of the reciprocating member (400) along the reciprocating axis; The transmission assembly (300) includes: A balance block (330) is configured to balance the reciprocating vibrations of the transmission assembly (300) during the process of converting rotary input into reciprocating output; Transmission housing (350); In the first direction, the ratio of the length L1 of the transmission housing (350) to the length L2 of the housing assembly (100) is greater than or equal to 0.3 and less than or equal to 0.

6.

16. [Correction 04.03.2026 according to Rule 91] The reciprocating cutting tool according to claim 15, wherein, The minimum vertical distance D1 between the balance block (330) and the reciprocating component (400) is greater than or equal to 0 and less than or equal to 8 mm.

17. [Correction 04.03.2026 based on Rule 91] The reciprocating cutting tool according to claim 15, wherein, The angle between the axis of the motor and the reciprocating axis is greater than or equal to 0° and less than or equal to 90°.

18. [Correction 04.03.2026 based on Rule 91] The reciprocating cutting tool according to claim 15, wherein, The housing assembly (100) includes a grip (101) having a grip area (1011) that can be gripped by an operator's hand; the motor (210) is at least partially located within the grip area (1011).

19. [Correction 04.03.2026 based on Rule 91] The reciprocating cutting tool according to claim 15, wherein, The reciprocating cutting tool also includes a guide bearing (340) configured to at least support the reciprocating member (400) and guide the reciprocating motion of the reciprocating member (400).

20. [Correction 04.03.2026 based on Rule 91] The reciprocating cutting tool according to claim 15, wherein, The eccentric drive wheel includes a drive wheel (311) and a first eccentric part (312); the drive wheel (311) can mesh with the output end of the motor (210) to rotate with the rotation of the motor (210); The first eccentric part (312) is connected to the reciprocating member (400) to drive the reciprocating member (400) to perform reciprocating motion.

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