Reciprocating saw

Abstract

The utility model discloses a reciprocating saw. The reciprocating saw includes: a housing; the motor is provided with a motor shaft; the front end of the sliding rod is connected with a saw blade; the transmission assembly converts rotation of the motor shaft into reciprocating motion of the sliding rod; the reciprocating saw further comprises a guide piece arranged on the periphery of the sliding rod and used for guiding the reciprocating motion of the sliding rod. The gearbox is provided with a first shell located above the sliding rod and the guiding piece, and the first shell abuts against the guiding piece. According to the scheme, the size of the reciprocating saw can be effectively reduced while supporting and limiting of the sliding rod and the guiding piece are guaranteed, and the using hand feeling of the reciprocating saw is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, in particular to a reciprocating saw. BACKGROUND

[0002] A reciprocating saw is an electric tool that cuts workpieces through the reciprocating movement of a reciprocating rod with a saw blade. Since the saw blade cuts workpieces through reciprocating movement, it vibrates greatly during work, which may have a negative impact on cutting accuracy and efficiency. In order to reduce vibration, a counterweight that moves relative to the reciprocating rod is generally provided in the reciprocating saw to reduce the vibration. In addition, in order to ensure the accuracy and efficiency of the reciprocating rod driving the saw blade to cut, other components are also provided for guiding and limiting. These components will increase the size of the reciprocating saw, which is not conducive to ensuring the hand feeling of the user holding the reciprocating saw, and will also increase the relevant cost.

[0003] This section provides background information relating to the present application, which can not necessarily be prior art. SUMMARY

[0004] It is an object of the present application to solve or at least reduce some or all of the above problems. To this end, the present application provides a reciprocating saw. In order to achieve the above object, the present application adopts the following technical solution:

[0005] A reciprocating saw, comprising: a housing; a motor having a motor shaft; a slide rod having a front end for connecting a saw blade; a transmission assembly converting rotation of the motor shaft into reciprocating movement of the slide rod; wherein the reciprocating saw further comprises: a guide member disposed on the outer periphery of the slide rod to guide the reciprocating movement of the slide rod; a gear box having a first housing located above the slide rod and the guide member, the first housing abutting the guide member.

[0006] In some embodiments, the guide member is sleeved on the outer periphery of the slide rod, and the first housing has a first limiting groove abutting the guide member.

[0007] In some embodiments, the reciprocating saw further comprises: a pressing plate located below the slide rod and the guide member and abutting the guide member.

[0008] In some embodiments, the guide member is sleeved on the outer periphery of the slide rod, and the pressing plate has a second limiting groove abutting the guide member and a rotation-preventing plane limiting rotation of the slide rod about a straight line in which the slide rod reciprocates.

[0009] In some embodiments, the pressing plate is connected to the first housing, and the first housing and the pressing plate jointly support and limit the slide rod and the guide member.

[0010] In some embodiments, the transmission assembly comprises a counterweight located above the first housing and at least partially accommodated in the gear box, and during the reciprocating movement of the slide rod, the counterweight reciprocates in the opposite direction of the slide rod.

[0011] In some embodiments, the gear box has a second housing at least partially above the first housing, the first housing is connected with the second housing and a housing gap is formed between the first housing and the second housing for the balance block to pass through.

[0012] In some embodiments, the projection of the balance block and the first housing in the up-down direction at least partially coincide during the reciprocating movement of the slide bar.

[0013] In some embodiments, the transmission assembly further comprises an anti-rotation member, which is arranged on the gear box and above the first housing.

[0014] In some embodiments, the anti-rotation member has an anti-rotation hole for the balance block to pass through, which limits the rotation of the balance block with the straight line of the reciprocating movement as the axis.

[0015] In some embodiments, the motor shaft forms or is mounted with a driving gear; the transmission assembly comprises a first transmission wheel, and the driving gear drives the first transmission wheel.

[0016] In some embodiments, the transmission assembly further comprises a second transmission wheel, which comprises an eccentric block and a transmission pin, the eccentric block forms a connecting part connected to the first transmission wheel, and the transmission pin is formed or connected to one side of the second transmission wheel away from the eccentric block.

[0017] In some embodiments, the slide bar comprises a connecting member, which forms a transmission groove or a transmission hole for the transmission pin to insert.

[0018] A reciprocating saw, comprising: a housing; a motor having a motor shaft; a slide bar having a front end for connecting a saw blade; a transmission assembly for converting the rotation of the motor shaft into the reciprocating movement of the slide bar; wherein the reciprocating saw further comprises: a guide member arranged on the outer periphery of the slide bar for guiding the reciprocating movement of the slide bar; a gear box having a first housing above the slide bar and the guide member and a second housing at least partially above the first housing; the transmission assembly comprises a balance block, the first housing is connected with the second housing and a housing gap is formed between the first housing and the second housing for the balance block to pass through.

[0019] A reciprocating saw, comprising: a housing; a motor having a motor shaft; a slide bar having a front end for connecting a saw blade; a transmission assembly for converting the rotation of the motor shaft into the reciprocating movement of the slide bar; wherein the reciprocating saw further comprises: a guide member arranged on the outer periphery of the slide bar for guiding the reciprocating movement of the slide bar; a pressure plate below the slide bar and the guide member, having a second limiting part abutting with the guide member and an anti-rotation part limiting the rotation of the slide bar with the straight line of the reciprocating movement as the axis.

[0020] The application has the advantages of optimizing the limiting structure of the slide rod and the guide in the reciprocating saw, so as to achieve the technical effects of simplifying components, reducing size and lowering cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a perspective view of a reciprocating saw as an embodiment of the application;

[0022] Figure 2 is Figure 1 a perspective view of part of the internal structure of the reciprocating saw shown in Fig. 1;

[0023] Figure 3 is Figure 1 an exploded view of part of the internal structure of the reciprocating saw shown in Fig. 1 from one perspective;

[0024] Figure 4 is Figure 1 an exploded view of part of the internal structure of the reciprocating saw shown in Fig. 1 from another perspective;

[0025] Figure 5 is Figure 1 a perspective view of the slide rod, the guide sleeve, the first housing and the second housing of the gear box in the reciprocating saw shown in Fig. 1;

[0026] Figure 6 is Figure 1 a perspective view of the slide rod, the guide sleeve and the pressing plate in the reciprocating saw shown in Fig. 1;

[0027] Figure 7 is Figure 1 a sectional view of the reciprocating saw shown in Fig. 1 when viewed in the left-right direction.

[0028] BRIEF DESCRIPTION OF DRAWINGS 100, reciprocating saw; 10, outer shell; 11, first grip part; 12, second grip part; 20, motor; 21, motor shaft; 22, drive gear; 30, slide rod; 31, saw blade; 32, guide; 33, connecting piece; 331, transmission groove / transmission hole; 40, transmission assembly; 41, first transmission wheel; 411, matching part; 412, connecting hole; 42, second transmission wheel; 421, eccentric block; 4211, connecting part; 422, transmission pin; 43, balancing block; 431, anti-rotation piece; 4311, anti-rotation hole; 50, gear box; 51, first housing; 511, first limiting groove; 52, second housing; 53, housing gap; 60, pressing plate; 61, second limiting part / second limiting groove; 62, anti-rotation part / anti-rotation plane. DETAILED DESCRIPTION

[0029] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described drawings.

[0030] In this application, the terms "include", "comprise" or "have" or any other variations thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that include a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without more limitations, an element defined by the statement "including a..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0031] In this application, the term "and / or", is a description of an associated relationship with the associated object, which means that there can be three kinds of relationships. For example, A and / or B, can represent: A exists alone, A and B exist together, B exists alone, these three cases. In addition, the character " / " in this application generally represents that the front and rear associated objects are a "and / or" relationship.

[0032] In this application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection refers to the connection of two parts or components without the need for an intermediate part, indirect connection refers to the connection of two parts or components with at least one intermediate part, and the connection of the two parts or components through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0033] In this application, those of ordinary skill in the art will understand that the relative terms used in connection with quantities or conditions (for example, "about", "approximately", "substantially" and the like) include the values described and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative term can refer to a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain degree (for example, 1 degree, 5 degrees, 10 degrees or more) added or subtracted from the indicated angle.

[0034] In this application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0035] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the present application. In addition, it is also understood in the context that when referring to one element connected to another element "on" or "under", it can be directly connected to another element "on" or "under" or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, left below, right below, front below and back below, etc.

[0036] The technical solutions proposed in the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0037] Reference Figures 1 to 7 It shows a reciprocating saw 100 in an embodiment of the present application and defines six directions of upper, lower, left, right, front and back. The reciprocating saw 100 can include a housing 10, a motor 20, a slide rod 30 and a transmission assembly 40. The housing 10 can support and accommodate the motor 20, the slide rod 30, the transmission assembly 40 and the components to be described later. The housing 10 extends horizontally in the front-back direction and forms a first accommodating space. The motor 20, as the prime mover of the reciprocating saw 100, is arranged in the first accommodating space and provides the original driving force for the saw blade 31 of the reciprocating saw 100. The slide rod 30 has a saw blade 31 clamped and connected to the front end as a functional part of the reciprocating saw 100. Specifically, the slide rod 30 can be provided with a clamping mechanism for connecting the saw blade 31. The slide rod 30 is at least partially accommodated in the first accommodating space and reciprocates during operation to enable the saw blade 31 to cut the workpiece. The transmission assembly 40 can be accommodated in the first accommodating space. It realizes power transmission between the motor shaft 21 and the slide rod 30, and can convert the rotation of the motor shaft 21 into reciprocating motion of the slide rod 30.

[0038] In some embodiments, as shown in Figure 3 , Figure 4 , Figure 7 The motor shaft 21 of the motor 20 is formed or mounted with a drive gear 22, and the transmission assembly 40 includes a first transmission wheel 41 and a second transmission wheel 42. The drive gear 22 is engaged with the first transmission wheel 41. When the motor shaft 21 rotates, the drive gear 22 drives the first transmission wheel 41 to rotate, and the original driving force of the motor shaft 21 is transmitted to the transmission assembly 40. The first transmission wheel 41 is connected with the second transmission wheel 42, and the second transmission wheel 42 is connected with the slide rod 30. The second transmission wheel 42 has an eccentric structure, which can convert the rotation trend of the first transmission wheel 41 into reciprocating motion trend and output. When the first transmission wheel 41 rotates, the second transmission wheel 42 drives the slide rod 30 to reciprocate.

[0039] In some embodiments, the second transmission wheel 42 includes an eccentric block 421 and a transmission pin 422, wherein the eccentric block 421 is connected to the first transmission wheel 41, and the transmission pin 422 is connected to the slide rod 30. Specifically, the second transmission wheel 42 is provided with the eccentric block 421 on the side close to the first transmission wheel 41, and is provided with the transmission pin 422 on the side away from the first transmission wheel 41 or the eccentric block 421. The eccentric block 421 is formed with a connecting portion 4211 connected to the first transmission wheel 41, and the first transmission wheel 41 is formed with a matching groove 411 on the side close to the second transmission wheel 42, which can be embedded with the eccentric block 421, and is further provided with a connecting hole 412 in the matching groove 411, which can be inserted with the connecting portion 4211. The slide rod 30 further includes a connecting piece 33 formed with a transmission groove 331 or a transmission hole 331, and the transmission pin 422 is embedded in the transmission groove 331 or the transmission hole 331.

[0040] During the rotation of the first transmission wheel 41, the eccentric block 421 and the transmission pin 422 rotate coaxially with the first transmission wheel 41, and their positions will periodically go back and forth from the front-to-back direction or the left-to-right direction. The transmission groove 331 or the transmission hole 331 has a certain space in the left-to-right direction to allow the transmission pin 422 to displace in the groove or the hole by itself, but does not have a space in the front-to-back direction to allow the transmission pin 422 to displace in the groove or the hole by itself, so that the transmission pin 422 follows the rotation of the first transmission wheel 41, and the connecting piece 33 and the slide rod 30 follow the reciprocating motion of the transmission pin 422 in the front-to-back direction.

[0041] Of course, the above-mentioned embodiments are only optional implementation modes of the transmission assembly 40 in the reciprocating saw 100, and other transmission assemblies 40 with other configurations that do not conflict with the scheme of the present application can also be adaptively introduced under the condition of the change of the motor 20 position, etc.

[0042] Generally, the reciprocating saw 100 is also provided with an operating member for starting and stopping the reciprocating saw 100, i.e., starting and stopping the above-mentioned motor 20, and in some embodiments, the operating member can also be used for the user to operate to realize more diversified functions. The operating member can be arranged in front of the first holding portion 11 of the reciprocating saw 100, and in some embodiments, the operating member can be a trigger. In addition, the reciprocating saw 100 generally includes a power supply assembly, and in some embodiments, the power supply assembly is a battery pack that can be plug-in connected with the reciprocating saw 100. In other embodiments, the power supply assembly can also include a power adapter, a voltage conversion circuit, a rectifier filter circuit, and other related circuits for realizing the access of commercial power.

[0043] The reciprocating saw 100 can further include a guide 32 and a gear box 50. The guide 32 limits and guides the reciprocating movement of the slide rod 30, and can be arranged around the outer periphery of the slide rod 30 to guide the reciprocating movement of the slide rod 30 in the axial direction and limit the movement of the slide rod 30 in the radial direction. In some embodiments, the guide 32 can be a guide sleeve with an inner diameter greater than the outer diameter of the slide rod 30, which can be clamped around the outer periphery of the slide rod 30. Commonly, the radial cross-section of the guide 32 along the slide rod 30 can be circular or circular-like, and of course, the radial cross-section can also be other shapes such as rectangular or rectangular-like according to design requirements. The gear box 50 is contained in the first containing space described above, and the gear box 50 can be composed of several inner housings and can additionally form a second containing space in the first containing space described above. The transmission assembly 40 described above for power conversion and transmission can be at least partially contained in the second containing space.

[0044] In this embodiment, as shown in Figures 3 to 5 、 Figure 7 , the gear box 50 includes a first housing 51 above the slide rod 30 and the guide 32, which can abut the upper part of the guide 32 to provide support above the slide rod 30 and the guide 32. It can be understood that in order to achieve the purpose of limiting and guiding the slide rod 30, the guide 32 needs to have support in the up-down direction. Using the first housing 51 of the gear box 50 to directly abut the guide 32 to complete the upper side support, compared with other solutions, it can effectively utilize the existing components, avoid adding other components, thereby reducing the size of the second grip 12 of the reciprocating saw 100, reducing the circumference of the second grip 12, making the user feel better when holding the reciprocating saw 100, and also reducing the use cost of other components.

[0045] In some embodiments, the first housing 51 of the gear box 50 has a first limiting groove 511 directly abutting the guide 32. Based on the foregoing, taking the guide 32 as an example of a guide sleeve with a circular radial cross-section, the side of the first housing 51 of the gear box 50 facing the slide rod 30 and the guide sleeve is formed with a first arc-shaped groove abutting the upper part of the outer periphery of the guide sleeve. The first arc-shaped groove extends in the axial direction along the reciprocating movement direction of the slide rod 30, and is attached to the upper part of the outer periphery of the guide sleeve in the radial direction. If the radial cross-section of the guide 32 is rectangular, the first housing 51 can have a first rectangular groove attached to the upper wall and the left and right walls of the guide 32 accordingly.

[0046] As shown in Figure 3 、 Figure 4 、 Figure 6 、 Figure 7As shown, the reciprocating saw 100 can further include a pressing plate 60 below the slide bar 30 and the guide 32, which can abut the lower part of the guide 32 to provide support for the slide bar 30 and the guide 32 from below, thereby achieving double support and limiting of the slide bar 30 and the guide 32 in the up-down direction. In some embodiments, the pressing plate 60 has a second limiting groove 61 directly abutting the guide 32. For example, when the guide 32 is a guide sleeve with a circular radial cross-section, the side of the pressing plate 60 facing the slide bar 30 and the guide sleeve is formed with a second arc-shaped groove abutting the lower part of the outer periphery of the guide sleeve. The second arc-shaped groove extends in the axial direction along the direction of reciprocating movement of the slide bar 30, and is in contact with the lower part of the outer periphery of the guide sleeve in the radial direction. If the radial cross-section of the guide 32 is rectangular, the pressing plate 60 can correspondingly have a second rectangular groove in contact with the lower wall and the left and right walls of the guide 32.

[0047] In some embodiments, in addition to the function of abutting the guide 32 to support and limit the slide bar 30 and the guide 32 from below, the pressing plate 60 also has an anti-rotation function of preventing the slide bar 30 and the guide 32 from rotating about the straight line along which they reciprocate. Specifically, the pressing plate 60 has, in addition to the second limiting part 61 supporting and limiting the guide 32 from below, an anti-rotation part 62 preventing the guide 32 from flipping about the axis.

[0048] In light of the foregoing, in some embodiments, the slide bar 30 includes a connecting piece 33 formed with a transmission groove 331 or a transmission hole 331, and the connecting piece 33 has a flat surface facing the pressing plate 60, which can be perpendicular to the transmission pin 422 inserted into the transmission groove 331 or the transmission hole 331. In addition to the second limiting groove 61, the pressing plate 60 has an anti-rotation flat surface 62 parallel to the flat surface of the connecting piece 33, which limits the flipping of the slide bar 30 and the guide 32 about the axis through the flat surface of the connecting piece 33. The anti-rotation flat surface 62 can be located above the second limiting groove 61, for example, it can be an anti-rotation platform extending to the left and right sides of the groove opening of the second limiting groove 61. In other embodiments, the second limiting groove 61 and the anti-rotation flat surface 62 can be connected by point connection or a combination of point and line connection, to further reduce the material consumption of the pressing plate 60.

[0049] In some embodiments, the first housing 51 of the gear box 50 and the pressing plate 60 are also connected to each other to support each other in the up-down direction, and jointly press the slide bar 30 and its guide 32. For example, the first housing 51 of the gear box 50 and the pressing plate 60 can be connected by bolts, the shanks of which can pass through the pressing plate 60 and the first housing 51 and be locked by nuts or threads on the inner walls of the housing through holes. In other embodiments, a support member for supporting and limiting the pressing plate 60 can be formed on or connected to the inner wall of the lower side of the housing of the reciprocating saw 100, and / or a support member for supporting and limiting the first housing 51 of the gear box 50 can be formed on or connected to the inner wall of the upper side of the housing of the reciprocating saw 100.

[0050] As shown in FIG. 1, the drive assembly 40 of the reciprocating saw 100 can further include a balance block 43 for damping, which reciprocates in the opposite direction of the slide bar 30 when the slide bar 30 reciprocates. Figures 3 to 7 As shown in FIG. 1, the drive assembly 40 of the reciprocating saw 100 can further include a balance block 43 for damping, which reciprocates in the opposite direction of the slide bar 30 when the slide bar 30 reciprocates.

[0051] In some embodiments, the gear box 50 includes the first housing 51 and the second housing 52 staggered in the up-down direction, wherein the second housing 52 is at least partially above the first housing 51, the second housing 52 forms a second accommodating space, which is a sub-space of the first accommodating space formed by the housing 10 of the reciprocating saw 100, and the drive assembly 40 described above can be partially accommodated in the second accommodating space.

[0052] In the embodiment, the first and second housings 51, 52 are staggered and connected in the up-down direction, and a housing gap 53 is present between the two housings, through which the counterbalance 43 can reciprocate in the opposite direction of the slide bar 30. It should be understood that the first and second housings 51, 52 are not necessarily separate components, but can be two parts of the gear box 50 formed integrally. Whether separate or integral, the gear box 50 has a housing gap 53 through which the counterbalance 43 can pass. As described above, in some embodiments, the reciprocating saw 100 can have, in the up-down direction, in order, the motor 20, the second housing 52, the first transmission wheel 41, the counterbalance 43, the first housing 51, the second transmission wheel 42, and the slide bar 30. Compared with other solutions, the above embodiment provides displacement space for the counterbalance 43 by opening the gear box 50, which is conducive to the extension of the stroke of the counterbalance 43 and the reduction of the size of the reciprocating saw 100.

[0053] In some embodiments, during the reciprocating movement of the slide bar 30, the projection of the counterbalance 43 reciprocating in the opposite direction of the slide bar 30 and the first housing 51 in the up-down direction will at least partially coincide, so that the counterbalance 43 can utilize the space above the first housing 51 to overlap the stroke of the slide bar 30.

[0054] In some embodiments, the transmission assembly 40 further includes an anti-rotation member 431 for limiting the rotation of the counterbalance 43 about the straight line in which the counterbalance 43 reciprocates as the axis, and the anti-rotation member 431 is arranged above the first housing 51. In some embodiments, the anti-rotation member 431 is arranged above the first housing 51 and has an anti-rotation hole 4311 through which the counterbalance 43 can pass, which extends in the same direction as the counterbalance 43 in the front-back direction and has a radial cross-section that can limit the rotation of the counterbalance 43. Specifically, the anti-rotation hole 4311 can be a rectangular hole. In other embodiments, the anti-rotation member 431 can also be an anti-rotation pin arranged on the upper end surface of the first housing 51.

[0055] The basic principles, main features, and advantages of the present application are shown and described above. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent substitution or equivalent transformation falls within the scope of the present application.

Claims

1. A reciprocating saw, comprising: a housing; a motor having a motor shaft; a slide bar having a front end for connecting a saw blade; a transmission assembly transforming rotation of the motor shaft into reciprocating motion of the slide bar; characterized in that the reciprocating saw further comprises: a guide member arranged around the slide bar to guide the reciprocating motion of the slide bar; a gear box having a first housing above the slide bar and the guide member, the first housing abutting against the guide member.

2. The reciprocating saw of claim 1, wherein, The guide member is arranged around the slide bar, and the first housing has a first limiting slot abutting against the guide member.

3. The reciprocating saw of claim 1, wherein, The reciprocating saw further comprises a pressing plate below the slide bar and the guide member, and abutting against the guide member.

4. The reciprocating saw of claim 3, wherein, The guide member is arranged around the slide bar, and the pressing plate has a second limiting slot abutting against the guide member, and has an anti-rotation plane limiting rotation of the slide bar about a straight line along which the slide bar reciprocates.

5. The reciprocating saw of claim 3, wherein, The pressing plate is connected to the first housing, and the first housing and the pressing plate jointly support and limit the slide bar and the guide member.

6. The reciprocating saw of claim 1, wherein, The transmission assembly comprises a balance block above the first housing and at least partially accommodated in the gear box, and during reciprocating motion of the slide bar, the balance block reciprocates in a direction opposite to the slide bar.

7. The saw of claim 6, wherein, The gear box has a second housing at least partially above the first housing, and the first housing is connected to the second housing, and a housing gap is formed between the first housing and the second housing for the balance block to pass through.

8. The reciprocating saw of claim 6, wherein, During reciprocating motion of the slide bar, a projection of the balance block and the first housing in the vertical direction at least partially overlaps.

9. The reciprocating saw of claim 6, wherein, The transmission assembly further comprises an anti-rotation member arranged on the gear box and above the first housing.

10. The reciprocating saw of claim 9, wherein, The anti-rotation member has an anti-rotation hole for the balance block to pass through, and the anti-rotation hole limits rotation of the balance block about a straight line along which the balance block reciprocates.

11. The reciprocating saw of claim 1, wherein, The motor shaft forms or is mounted with a driving gear; the transmission assembly comprises a first transmission wheel, and the driving gear drives the first transmission wheel.

12. The saw of claim 11, wherein, The transmission assembly further comprises a second transmission wheel, and the second transmission wheel comprises an eccentric block and a transmission pin, the eccentric block forms a connecting portion connected to the first transmission wheel, and the transmission pin is formed on or connected to a side of the second transmission wheel away from the eccentric block.

13. The saw of claim 12, wherein, The slide bar comprises a connecting member, and the connecting member forms a transmission slot or a transmission hole for the transmission pin to insert.

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