WO2012094997A1

WO2012094997A1 - Reciprocating cutting tool

Info

Publication number: WO2012094997A1
Application number: PCT/CN2012/070212
Authority: WO
Inventors: 吴建; 安德罗⋅保罗; 闫明星
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2011-01-14
Filing date: 2012-01-11
Publication date: 2012-07-19

Abstract

Provided is a reciprocating cutting tool (10) for cutting workpieces. The tool comprises: a handle (11); a housing (13) pivotably connected to the handle and operatively rotatable relative to the handle, enabling a first operational state and a second operational state of the reciprocating cutting tool; a motor (25) contained in the housing; and a saw blade (17) driven by the motor in reciprocating motions. The area of the reciprocating cutting tool leaning against the work piece surface in the second operational state is larger than the area of the reciprocating cutting tool leaning against the work piece surface in the first operational state. The reciprocating cutting tool stably and reliably cuts the work piece when in the second operational state, suitable for fine cutting; when in the first operational state, due to the relatively smaller area of the reciprocating cutting tool leaning against the work piece surface, the reciprocating cutting tool is suitable for rough processing such as quickly cutting off objects and the like. The present invention improves the overall performance of the reciprocating cutting tool and is convenient for users to use.

Description

Reciprocating cutting tool

The present invention relates to a reciprocating cutting tool, and more particularly to a hand-held reciprocating cutting tool. Background technique

Both the reciprocating saw and the jigsaw are one of the reciprocating cutting tools. Their working principle is basically the same. The motor drives the reduction gear to drive the reciprocating rod to reciprocate, so that the saw blade connected to the free end of the reciprocating rod can be used for the workpiece. Perform a reciprocating cutting operation. The only difference is that the jigsaw is cut against the surface of the workpiece by a bottom plate. The gravity of the jigsaw is carried by the workpiece, while the reciprocating saw is held by the user and bears the gravity of the reciprocating saw.

Because of the different working methods, the jigsaw is small in size and used for more elaborate processes. It often has a large support plate to provide stable and reliable support for the cutting work. The reciprocating saw is bulky and is used for roughing. The process, such as simply cutting the workpiece, its support plate is often designed to be small.

In the course of work, users often need to alternate between the two tools, which is cumbersome and affects work efficiency, which brings great inconvenience to the user. Some manufacturers have introduced multi-function saws that can be converted between reciprocating saws and jigsaws. However, because their support plates against the surface of the workpiece are small, they do not provide stable support when used as jigsaws. The cutting accuracy is low and cannot meet the needs of the user.

Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a reciprocating cutting tool having two working states and having a relatively comfortable and stable operational feeling.

To achieve the above object, the present invention provides a reciprocating cutting tool for cutting a workpiece, comprising: a handle; a housing pivotally coupled to the handle, operatively rotatable relative to the handle to cause the reciprocating The cutting tool has a first working state and a second working state; a motor housed in the housing; a saw blade reciprocatingly driven by the motor; the reciprocating cutting tool abuts against the workpiece surface in the second working state The area is greater than the area of the workpiece in the first working state against the surface of the workpiece.

Preferably, the housing has a first abutting surface, and the handle has a second abutting surface, and the first abutting surface abuts when the reciprocating cutting tool is in the first working state The workpiece, when the reciprocating cutting tool is in the second working state, the first abutting surface and the second The abutment faces together against the workpiece.

Preferably, when the reciprocating cutting tool is in the second working state, the first abutting surface and the second abutting surface are coplanar against the workpiece.

Preferably, when the reciprocating cutting tool is in the first working state, the first abutting surface and the second abutting surface intersect without being coplanar.

Preferably, when the reciprocating cutting tool is in the first working state, the first abutting surface and the second abutting surface are perpendicular.

Preferably, the housing has a first support frame, the first abutting surface is located on the first support frame, and the handle comprises a grip portion and a second support frame having the second abutting surface .

Preferably, the second support frame has an abutting plate capable of abutting against the workpiece, and the abutting plate is provided with a fan assembly, and the fan assembly is configured to be performed when the reciprocating cutting tool is in the second working state. Blowing dust.

Preferably, the fan assembly is driven by a separate fan motor.

Preferably, the second support frame has an abutment plate capable of abutting against the workpiece, and the abutment plate houses a battery pack for powering the fan assembly and the motor.

Preferably, the battery pack is located between the second abutting surface and the grip portion.

Preferably, the abutting plate has a receiving portion extending along the longitudinal direction and partially accommodating the battery pack, and the extending direction of the receiving portion is perpendicular to the motor axis.

Preferably, the battery pack is inserted into the receiving portion from an end of the receiving portion facing away from the saw blade. Preferably, the surface of the second support frame facing the workpiece is provided with a backing plate, and the second abutting surface is a surface of the backing plate facing the workpiece.

Preferably, the material of the pad is plastic or metal.

Preferably, when the reciprocating cutting tool is switched from the first working state to the second operating state, its center of gravity is radially adjacent to the handle along the axis of the motor.

Preferably, when the reciprocating cutting tool is in the first working state, the first abutting surface and the second abutting surface are not coplanar in parallel.

The reciprocating cutting tool of the present invention has a first working state and a second working state, and the area of the second working state against the surface of the workpiece is greater than the area of the workpiece in the first working state against the surface of the workpiece, so that In the working state, the workpiece is very stable and reliable, and is suitable for performing fine cutting work. When the reciprocating cutting tool is in the first working state, the area against the surface of the workpiece is relatively small, and is suitable for quickly cutting objects and the like. machining. This setting improves the reciprocating cutter The overall performance and improved operating comfort bring great convenience to the user.

The present invention also provides a reciprocating cutting tool for cutting a workpiece, comprising: a housing including a motor housing and a transmission housing; a motor housed in the motor housing having a motor axis; a reciprocating rod in the housing and driven by the motor to reciprocate; a handle coupled to the housing; the transmission housing being rotatable relative to the handle about the motor axis.

Preferably, the reciprocating rod has a longitudinally extending direction and extends in a direction perpendicular to the motor axis.

Preferably, the transmission housing is fixedly disposed with the motor housing.

Preferably, the transmission housing is provided with a limiting member, and the locking member is fitted with the locking member.

Preferably, the limiting member extends in a direction in which the motor axis extends.

Preferably, the housing is mounted with a first support frame having a first abutment surface, the handle is mounted with a second support frame having a second abutment surface, the motor axis being parallel to the first abutment a face and the second abutment surface.

Preferably, the distance from the motor axis to the first abutting surface and the second abutting surface is equal. Preferably, the handle further includes a grip extending along the longitudinal direction, and an angle between the extending direction of the grip and the second abutting surface ranges from 10 to 20 degrees.

Preferably, the second support frame has a receiving portion for accommodating the battery pack, and the extending direction of the receiving portion is parallel to the second abutting surface.

The reciprocating cutting tool of the present invention realizes the handle size of the reciprocating cutting tool by setting the motor outside the handle, thereby improving the grip comfort, and reciprocating cutting by rotating the housing relative to the handle about the motor axis. The tool has a first working state and a second working state, so that the reciprocating cutting tool is small in size, which satisfies the demand for miniaturization of the product.

The present invention also provides a reciprocating cutting tool for cutting a workpiece, comprising: a handle; a housing pivotally coupled to the handle; a motor housed in the housing; a reciprocating rod driven by the motor to reciprocate a limiting member disposed on the housing; the handle is detachably mounted with a locking member, the locking member being engageable with the limiting member and operable to limit the housing and a locking position of the handle relative to rotation, and a release position allowing the housing to rotate relative to the handle; the locking member at least partially surrounding the limiting member.

Preferably, the handle has a smooth inner surface that is always in contact with the outer surface of the stop. Preferably, the limiting member has a limiting groove, and the locking member is provided with the limiting position A groove that fits in the groove.

Preferably, the locking member extends longitudinally and the intermediate portion has an arc that curves toward the stop member.

Preferably, the handle is provided with an adapter, and the adapter receives the locking member and the limiting member.

Preferably, the locking member is mounted to the adapter by an eccentric shaft, and the eccentric shaft is operatively rotated to change the distance of the eccentric axis relative to the limiting member.

Preferably, the eccentric shaft includes a connecting shaft limiting portion that is mated with the mating piece and has a circumferential tooth surface, and an eccentricity extending from the limiting portion and used for connecting with the locking member unit.

Preferably, the adapter is provided with a hole that is matched with the connecting shaft limiting portion.

Preferably, when the locking member is in the locking position, the surface of the locking member near the protrusion is in close contact with the limiting member.

Preferably, the reciprocating cutting tool further includes a cover that cooperates with the mating member to form a space for receiving the limiting member and the locking member.

Preferably, the motor has a motor axis, and the reciprocating cutting tool further includes an operating member coupled to the locking member and rotating about a rotation axis parallel to the motor axis to drive the locking member In the locked position and the released position.

Preferably, the reciprocating rod extends longitudinally, and the axis of rotation is perpendicular to a longitudinal extension direction of the reciprocating rod.

Preferably, the operating member is disposed on the mating member, and when the locking member is in the locking position, the operating member does not exceed the circumferential direction of the mating member relative to the motor axis Outline.

Preferably, the operating member is rotatably mounted on the adapter and has an operating end, the operating end is opposite to the motor axis when the locking member is in the locking position Radial extension.

Preferably, when the locking member is in the locking position, the operating member protrudes only from the operating end in the radial direction of the motor axis, and the fitting is circumferentially opposite to the motor axis. Outline.

Preferably, the operating member is capable of driving a portion of the locking member connected thereto to move relative to the handle in a radial direction of the motor shaft.

Preferably, the locking member is made of carbon steel having a carbon content of 0.60% to 0.95%.

The reciprocating cutting tool of the present invention partially surrounds the limiting member by the locking member, thereby increasing the rotational resistance between the locking member and the limiting member, and further providing the protrusion and the limiting member on the locking member. Limit The part cooperates to further increase the rotational resistance between the two, thereby achieving a positional relationship between the lock housing and the handle that can be stabilized.

The present invention also provides a cutting tool for cutting a workpiece, comprising: a handle having a grip; a housing coupled to the handle; a motor housed in the housing; capable of cutting by driving of the motor The saw blade of the workpiece; the handle further includes a grip portion for gripping and a receiving portion disposed side by side or perpendicular to the grip portion for receiving the battery pack.

Preferably, at least one support arm is connected between the receiving portion and the grip portion.

Preferably, the grip portion houses a control circuit board, and the control circuit board can detect at least the temperature or voltage of the battery pack.

Preferably, the housing portion houses a fan assembly that is driven by a separate motor and used for blowing dust during cutting.

Preferably, the receiving portion extends longitudinally, and the battery pack is received at one end and the air outlet of the fan assembly is disposed at the other end.

Preferably, the angle of the flow of the airflow blown from the air outlet hole to the maximum angle formed by the surface of the workpiece is in the range of 20 to 45 degrees, and the angle of the minimum angle is in the range of 0 to 20 degrees.

Preferably, the angle of the maximum angle is 25 degrees, and the angle of the minimum angle is 10 degrees. Preferably, the receiving portion has an abutting surface for abutting against the surface of the workpiece when the cutting tool cuts the workpiece.

Preferably, the battery pack is located between the abutting surface and the grip portion.

The cutting tool of the present invention additionally provides a receiving portion for accommodating the electronic device, so that a small amount of electronic components can be disposed or not disposed in the handle, so that the size of the handle can be effectively reduced, and the handle has better grip comfort. .

DRAWINGS

1 is a side view of the reciprocating cutting tool provided by the first embodiment, in which case the reciprocating cutting tool is in a first working state;

2 is a side view of the reciprocating cutting tool provided by the first embodiment, in which case the reciprocating cutting tool is in a second working state;

Figure 3 is a perspective exploded view of the reciprocating cutting tool of Figure 1;

Figure 4 is a partial cross-sectional view of the reciprocating cutting tool of Figure 2 taken along line I-I;

Figure 5 is a cross-sectional view showing the locking mechanism of the reciprocating cutting tool of Figure 1 in a locked state; Figure 6 is a cross-sectional view of the locking mechanism of Figure 5 in a released state; Figure 7 is a side view of the connecting shaft of the locking mechanism of Figure 5;

Figure 8 is a side view of the reciprocating cutting tool provided by the second embodiment, in which case the reciprocating cutting tool is in a first working state;

9 is a perspective view of the reciprocating cutting tool provided by the second embodiment, in which case the reciprocating cutting tool is in a second working state;

Figure 10 is a perspective view of the reciprocating cutting tool of Figure 9, wherein the fan receiving portion of the reciprocating cutting tool is cut away to expose the internal fan assembly;

Figure 11 is a perspective view of the reciprocating cutting tool of Figure 9, in which the reciprocating cutting tool is in an inverted state;

Figure 12 is a side elevational view of the reciprocating cutting tool of Figure 9 with the air outlet portion of the fan assembly of the reciprocating cutting tool being cut away.

The corresponding component numbers in the illustration are as follows:

10, reciprocating cutting tool 11, handle 12, battery pack

13. Housing 14, locking mechanism 15, first support frame

16, limit bolt 17, saw blade 18, button

19. Main body 20, mounting portion 21, first support plate

23, the first abutment surface 25, motor 27, transmission components

29, reciprocating rod 31, saw chuck 33, drive gear

35, reduction gear 37, gear shaft 39, eccentric shaft

41. The motor housing 43a, the first transmission housing 43b, and the second transmission housing

45, the grip portion 47, the switch 49, the second support frame

51, the first support arm 53, the second support arm 55, the abutment plate

56, the second abutment surface 57, the limit member 58, smooth surface

59. Mating member 60, operating member housing portion 61, locking member

63, operating parts 64, shaft 65, cover

67. Connecting shaft 69, connecting shaft limiting part 71, eccentric part

73, connecting portion 75, hole 100, reciprocating cutting tool

111, handle 112, battery pack 113, housing

115, the first support frame 117, the saw blade 129, the reciprocating rod

145, grip 146, holding space 147, switch

155, the abutting plate 156, the second abutting surface 159, the mating part 163, the operating member 165, the cover 168, the receiving slot

170, the operating end 176, the accommodating portion 177, the battery pack accommodating portion

179. Fan accommodating portion 181, fan assembly 183, air inlet hole

184, air outlet 185, fan casing 187, turbine

189, pad

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to Figure 1, a first embodiment of the present invention provides a reciprocating cutting tool 10. The reciprocating cutting tool 10 includes a handle 11, a battery pack 12 mounted on the handle 11, a housing 13 pivotally coupled to the handle 11, and a housing 13 disposed on the housing 13 for locking the relative position of the handle 11 and the housing 13. Mechanism 14, and a saw blade 17 extending from the interior of the housing 13.

Referring to Figures 1 and 3 together, the housing 13 has a first support frame 15, and the first support frame 15 includes a main body 19 and a first support plate 21 attached to one end of the main body 19. The main body 19 has a hollow square tube shape, and the first support plate 21 has a first abutting surface 23, and a central hole is provided in the first supporting plate 21 for the saw blade 17 to protrude from the first abutting surface 23. When the reciprocating cutting tool 10 cuts the workpiece, the first abutment surface 23 abuts against the surface of the workpiece, thereby providing support to the user, making the cutting process more stable. The main body 19 is provided with a mounting portion 20 at one end of the first support plate 21, and the mounting portion 20 is a snap-fit structure, so that the first support frame 15 can be mounted to the housing 13 through the mounting portion 20.

The housing 13 houses a motor 25, a transmission assembly 27 coupled to the motor 25, and a reciprocating rod 29 driven by the transmission assembly 27 and capable of partially extending out of the housing 13. A saw blade 17 is attached to the end of the reciprocating rod 29 away from the transmission assembly 27.

Referring to FIG. 3 and FIG. 4 together, the motor 25 has a motor output shaft and a drive gear 33 that is sleeved on the motor output shaft. When the motor 25 is energized, the drive gear 33 is rotated around the motor axis X by the motor output shaft.

The transmission assembly 27 can be coupled to the drive gear 33 and the reciprocating rod 29, respectively, to convert the rotation of the drive gear 33 into the reciprocating motion of the reciprocating rod 29. In the present embodiment, the transmission assembly 27 includes a reduction gear 35, a gear shaft 37, and an eccentric shaft 39. When the motor 25 drives the reduction gear 35, it can rotate about the gear axis Y of the gear shaft 37. The eccentric shaft 39 is disposed on the reduction gear 35 for mating with the reciprocating rod 29, and the eccentric axis Z of the eccentric shaft 39 is parallel to the gear axis Y. When the reduction gear 35 rotates, the eccentric axis Z can surround the gear axis Y. Turn.

Of course, those skilled in the art can also implement the work of the transmission component 27 by using other technical solutions. For example, the installation of the eccentric shaft on the drive gear 33 and the reciprocating rod 29, etc., will not be described in detail herein, but as long as the functions and effects thereof are the same or similar to the present invention, they should be covered by the present invention.

The reciprocating rod 29 extends in the longitudinal direction. The extending direction of the reciprocating rod 29 is perpendicular to the motor axis X. When the reciprocating rod 29 drives the saw blade 17 to perform the cutting operation under the driving of the transmission assembly 27, the saw blade 17 is driven to reciprocate along the extending direction. In this way, the motor 25 is disposed on one side of the reciprocating rod 29, which is farther from the handle 1 1 , thereby effectively reducing the influence of the vibration of the motor 25 on the user's hand during the work, and improving the operation comfort. In the present embodiment, the reciprocating rod 29 end is coupled to the eccentric shaft 39 through a groove plate (not shown) having a strip hole, thereby converting the rotation of the reduction gear 35 into the reciprocating motion of the reciprocating rod 29. The other end of the reciprocating rod 29 with respect to the slot plate is a saw chuck 3 1 , and the user can clamp or release the saw blade 17 by operating the blade chuck 3 1 . After the reciprocating rod 29 is mounted in the housing 13, the blade chuck 31 extends beyond the housing 13 and is received in the first support frame 15.

The housing 13 includes a motor housing 41 extending along the motor axis X and housing the motor 25, and a transmission housing extending along the extending direction of the reciprocating rod and housing the transmission assembly 27 and a portion of the reciprocating rod 29. The transmission housing is divided into a first transmission housing 43a integrally formed with the motor housing 41 and a second transmission housing 43b that cooperates with the first transmission housing 43a to form a receiving space. After the reciprocating cutting tool 10 is assembled, the transmission assembly 27 and a portion of the reciprocating rod 29 are received in the receiving space. In the present embodiment, since the motor axis X is disposed perpendicular to the extending direction of the reciprocating rod, the first transmission housing 43b and the motor housing 41 are integrally formed at this time, which makes the manufacturing process simpler and easier to assemble. Since the position between the transmission housing and the motor housing 41 is fixed, when the housing 13 is rotated relative to the handle 11, the direction of extension of the motor axis X and the reciprocating stem 4 is always perpendicular, thus making the internal transmission structure simple and reducing. The structural complexity makes assembly easy and extends the service life.

Please refer to Figure 1 and Figure 3 together. The housing 13 is rotatable relative to the handle 11 about the motor axis X and the user is able to define the positional relationship by operating the locking mechanism 14.

The handle 1 1 includes a grip portion 45, a switch 47 disposed on the grip portion 45, and a second support frame 49 coupled to the grip portion 45.

The grip portion 45 has a cylindrical shape and extends in the longitudinal direction, and one end thereof is used to attach the battery pack 12 by a snap fit, and the other end thereof is connected to the casing 13.

The switch 47 is disposed at a position where the grip portion 45 is close to the housing 13 and is disposed at a side of the grip portion 45 facing away from the user's face. When the user holds the grip portion 45, the index finger touches the switch. The trigger button of 47, this setting brings convenience to the user. A control circuit board (not shown) is also mounted in the grip portion 45, and a detection circuit for detecting the temperature and voltage of the battery in the battery pack 12 is mounted on the control circuit board, and when the temperature is higher than 75 degrees When the voltage is lower than 7.8V or the current is greater than 20A, the control switch 47 is turned off. Thus, the battery pack 12 is effectively protected and the service life is extended.

Of course, the control circuit board detects that the temperature, voltage or current in the battery pack is not limited to the values described above, and those skilled in the art may change the values according to actual needs, but as long as the functions implemented are the same or similar to the present invention, All should be covered by the scope of the present invention.

The second support frame 49 includes a first support arm 51, a second support arm 53, and an abutment plate 55. One free end of the first support arm 51 is coupled to one end of the grip portion 45 on which the battery pack 12 is mounted, and one free end of the second support arm 53 is coupled to the other end of the grip portion 45. The two free ends of the abutment plate 55 are respectively connected to the free ends of the first support arm 51 and the second support arm 53 away from the grip portion 45, and the abutment plate 55 has a second abutment against the grip portion 45. The surface 56 is used to enlarge the area of the reciprocating cutting tool 10 against the surface of the workpiece, so that the cutting process is more stable and reliable.

It can be understood that, in this embodiment, the grip portion 45, the first support arm 51, the second support arm 53, and the abutting plate 55 form a quadrilateral, wherein the grip portion 45 is disposed opposite to the abutting plate 55, and then The second abutment surface 56 can be provided on the abutment plate 55 for increasing the abutment area without affecting the size and structure of the grip portion 45. The grip portion 45 and the abutment plate 55 and the support arm may also form a "D" shape. Of course, those skilled in the art may further improve the technical solutions in the present invention, but as long as the functions and effects thereof are the same or similar to the present invention, they should be covered by the scope of the present invention.

Referring to FIG. 1 and FIG. 2 together, the reciprocating cutting tool 10 has a first working state and a second working state, wherein when the reciprocating cutting tool 10 is in the second working state, the area of the reciprocating cutting tool 10 against the surface of the workpiece is greater than When the reciprocating cutting tool 10 is in the first working state, the reciprocating cutting tool 10 abuts against the surface of the workpiece surface, so that the user can more flexibly respond to the use needs, and when the workpiece needs to be quickly cut, the reciprocating cutting tool 10 can be used. Adjusting to the first working state, when a more precise cutting is required, the reciprocating cutting tool 10 can be adjusted to the second working state, so that the process of cutting the workpiece is more stable and reliable. Moreover, when the reciprocating cutting tool 10 is switched from the first working state to the second working state, its center of gravity will be closer to the handle 1 1 along the radial direction of the motor axis X, so that when in the first working state, the user operates the reciprocating When the cutting tool 10 cuts the workpiece, the pressure required for cutting is provided to the saw blade 17 by the gravity of the center of gravity of the tool 10 and reciprocating, thereby saving the user. Self-physical force reduces wear fatigue; when the reciprocating cutting tool 10 is in the second working state, its center of gravity moves toward the side close to the handle 11, thereby making the user's control of the reciprocating cutting tool 10 more stable, which helps to improve cutting. Precision.

When the reciprocating cutting tool 10 is in the first working state, only the first abutting surface 23 abuts against the workpiece, that is, the first abutting surface 23 and the second abutting surface 56 do not co-planar, and the reciprocating cutting tool 10 is used at this time. The workpiece is quickly cut, preferably, the cut workpiece such as a wood stick, a pipe or a sheet that needs to be cut along a vertical plane. When the user operates the housing 13 to rotate relative to the handle 11, the reciprocating cutting tool 10 is in the second operational state, even though the first abutment surface 23 is rotated relative to the motor axis X to the first abutment surface 23 and the second abutment surface 56. Cooperating against the position of the surface of the workpiece, the reciprocating cutting tool 10 is in the second working state. Preferably, the first abutting surface 23 and the second abutting surface 56 simultaneously abut against a horizontal surface of the workpiece. on. Since the abutment area is increased to provide a more stable support for the cutting work, the reciprocating cutting tool 10 can be applied to the processing of the sheet along the horizontal plane, which has a high cutting precision.

The first abutting surface 23 and the second abutting surface 56 are both parallel to the motor axis X, and the first abutting surface 23 is rotatable relative to the second abutting surface 56 about the motor axis X, thus realizing the reciprocating cutting tool 10 has The two working states are described. Furthermore, the distance between the motor axis X and the first abutting surface 23 and the second abutting surface 56 is equal, so that the first abutting surface 23 and the second abutting surface 56 can be coplanar. Relying on the surface of the workpiece.

The rotation of the housing 13 of the reciprocating cutting tool 10 relative to the handle 11 is limited to a range of angles, so that the housing 13 can be prevented from rotating at an unrestricted angle with respect to the handle 11, causing the rotating shaft and the locking mechanism 14 to be easily damaged. And the angle setting between the housing 13 and the handle 11 in the two working states can be clearly defined, so that the user can quickly switch between the two, which brings convenience to the user. In the present embodiment, when the reciprocating cutting tool 10 is switched between the first working state and the second working state, the angle between the first abutting surface 23 and the second abutting surface 56 varies. 90 degrees to 0 degrees, that is, when the angle between the first abutting surface 23 and the second abutting surface 56 is 90 degrees, the reciprocating cutting tool 10 is in the first working state, and the second abutting surface When the angle between the 23 and the second abutment surface 56 is 0 degrees, the reciprocating cutting tool 10 is in the second operational state. Of course, the angle between the second abutting surface 23 and the second abutting surface 56 when the reciprocating cutting tool 10 is in the first working state is not limited to 90 degrees, which is only a preferred angle value, and the angle is The angle value may also be other angles such as 85 degrees, 80 degrees, 75 degrees or 70 degrees, etc., or the user may limit the two to the two by the locking mechanism 14 when the housing 13 is rotated relative to the handle 11. Angle is not At a position of 0 degrees, the reciprocating cutting tool 10 can also perform a cutting tool.

Of course, the abutting plate 55 is mounted on the grip portion 45 to pass other technical solutions, such as only the first support arm 51 or only the second support arm 53 or the like, that is, between the plate 55 and the grip portion 45. It is sufficient to connect at least one support arm. The shape of the second abutment surface 56 can also be set to a different shape according to different usage requirements, such as a square, a triangle, a circle or other polygons. Since the space is not here for the technical solution of attaching the abutment plate 55 to the grip portion 45 and the shape of the second abutment surface 56 - as an example, as long as the function and effect achieved are the same as the present invention Or similar, they should all be covered by the scope of the present invention.

After the reciprocating cutting tool 10 is switched from the first working state to the second working state, the saw teeth of the saw blade 17 will face the second supporting frame 49 at this time, and the user needs to hold the handle 1 1 and then pull back and forth. The cutting tool 10 performs a cutting operation. In order to make the reciprocating cutting tool 10 more comfortable when working in the second working state, the user can remove the saw blade 17 and reinstall it so that the serrations face away from the second supporting frame 49. The user can hold the handle 11 and push the reciprocating cutting tool 10 forward to perform the cutting work, thereby improving the work comfort.

In order to make the operation of the reciprocating cutting tool 10 more comfortable, the angle between the extending direction of the grip portion 45 of the handle 11 and the second abutting surface 56 ranges from 10 degrees to 30 degrees. Preferably, the clip The angle α of the angle α is 15 degrees, and the user is most comfortable when the handle 11 is held.

Of course, those skilled in the art can also realize that the reciprocating cutting tool 10 has two working states by other means, and that the area of the reciprocating cutting tool 10 in the second working state against the surface of the workpiece is greater than when it is in the first working state. Depending on the area of the surface of the workpiece, for example, the first support frame 15 is pivotally mounted with an abutment plate of the same shape as the first support plate 21, the abutment plate having opposite first and second surfaces The surface, wherein the second surface acts as a second abutment surface of the reciprocating cutting tool 10. When the reciprocating cutting tool 10 is in the first working state, the abutting plate can be received inside the main body 19 and only abuts against the workpiece surface by the first abutting surface 23 of the first supporting plate 21, the second abutting The surface and the first abutting surface 23 are parallel to each other and are not coplanar. When the reciprocating cutting tool 10 is in the second working state, the abutting plate is operated to rotate relative to the first supporting plate 21, so that the first abutting plate The surface or the second surface, which abuts the first abutment surface 23 against the surface of the workpiece, thereby expanding the area of the reciprocating cutting tool 101 against the surface of the workpiece. Of course, due to space limitations, only the abutment plate can be pivotally mounted on the first support plate 21, and the reciprocating cutting tool 10 has a first working state and a second working state. The person may also make other changes, such as the abutment plate may move in a translational manner relative to the first support plate 21, etc., here The description is not limited to the description of the present invention, but it should be included in the scope of the present invention as long as the functions and effects achieved are the same or similar to the present invention.

Referring to Fig. 3, the locking mechanism 14 has a locked state in which the lock housing 13 and the handle 1 are in a positional relationship with each other and a release state in which the housing 13 is allowed to rotate relative to the handle 11.

The locking mechanism 14 includes a limiting member 57 disposed on the second transmission housing 43b, an adapter member 59 disposed on the handle 1 1 for receiving the limiting member 57, and capable of engaging with the limiting member 57 to realize the locking function. The locking member 61, the operable operating member 63 for driving and locking the locking member 61, and the cover member 65 mounted on the matching member 59 enable the locking member 61 and the limiting member 57 to be received therein. The cover 65 is formed in the receiving space formed by the mating member 59.

Referring to FIG. 3 and FIG. 5 together, the limiting member 57 is disposed on the surface of the second transmission housing 43b facing away from the first transmission housing 43a, and has at least two limiting portions, each of the limiting positions. The portion can cooperate with the locking member 61 to define a positional relationship between the housing 13 and the handle 1 1 , wherein the at least two limiting portions have a vertical position limiting portion, and the locking member 61 can be vertical The straight position limiting portion cooperates such that the extending direction of the reciprocating rod 29 is perpendicular to the second abutting surface 56, that is, the first abutting surface 23 and the second abutting surface 56 are coplanar. In the present embodiment, the limiting member 57 has a cylindrical shape extending coaxially along the motor axis X, and the limiting portion is a limiting groove extending along the motor axis X disposed on the outer side surface of the limiting member 57. The limiting groove is used to cooperate with the locking member 61 to define the position of the handle 11 and the housing 13. Preferably, the number of the limiting recesses is plural and adjacently disposed, so that the circumferential outer surface of the limiting member 57 is covered with the limiting recess, so that the locking member 6 1 and the limiting recess can be realized. The slot fit achieves the position of the housing 13 in a plurality of positions, so that the user can arbitrarily adjust the angle of the housing 13 relative to the handle 1 1 according to actual needs, which greatly satisfies the use requirements.

The mating member 59 is disposed at an end of the handle 1 1 away from the battery pack 12, and when assembled to the reciprocating cutting tool 10, the mating member 59 receives the limiting member 57 and the locking member 61 and enables the housing 13 to surround the motor axis X rotates relative to the mating member 59. In the present embodiment, the adapter member 59 is integrally formed with the handle 1 1 , which has a hollow cylindrical shape and is sleeved outside the limiting member 57 , and the fitting member 59 and the limiting member 57 and the motor axis The X-coaxial extension allows the housing 13 to be rotated relative to the handle 1 1 about the motor axis X. This arrangement increases the use of the reciprocating cutting tool 10. An adapter accommodating portion 60 is disposed on the mating member 59 for partially accommodating the operating member 63 and allowing the operating member 63 to rotate within a certain angle range to realize the driving of the locking member 61, thereby realizing the limiting member 57, Both the locking member 61 and the operating member 63 are housed in the fitting member 59 in whole or in part, so that the structure is very compact and the volume of the whole machine is reduced. Referring to FIG. 3, FIG. 5 and FIG. 6 together, the locking member 61 is configured to cooperate with the limiting member 57 to realize the position of the housing 13 relative to the handle 11, which is operable to limit the housing 13 relative to The relatively rotational locking position of the handle 11, and the release position permitting relative rotation of the housing 13 relative to the handle, correspondingly causes the locking mechanism 14 to be in the locked and released states. When the user needs to adjust the working state of the reciprocating cutting tool 10, the locking member 61 is operated to be in the release position. When the working state adjustment is completed, the locking member 61 is operated to be in the locking position, so that the setting is used. It is very convenient to adjust the working state of the reciprocating cutting tool 10, and can stably lock in the target working state when the adjustment is completed, so that the working process is more stable and comfortable.

In the present embodiment, the locking member 61 extends longitudinally and the intermediate portion has a certain curvature so as to partially surround the limiting member 57, that is, the limiting member 57 is located on the side close to the center of the locking member 61. One end of the locking member 61 is attached to the adapter 59 via the connecting shaft 67, and the other end is connected to the operating member 63. The surface of the locking member 61 facing the limiting member 57 is a locking surface, that is, an arcuate inner side surface of the locking member 61. When the locking member 61 is in the locking position, the locking surface and the limiting member 57 is in close contact with each other, and the corresponding locking mechanism 14 is in the locked state. Since the surface of the limiting member 57 is provided with the limiting groove, the locking surface is not in close contact with the limiting member 57. Uniform, thereby further increasing the friction between the two, that is, increasing the rotational resistance between the housing 13 and the handle 11, thereby making the limit between the housing 13 and the handle 11 more stable; When the locking surface is disengaged from the limiting member, the locking member 61 is in the released position, and the locking mechanism 14 is in the released state.

In order to make the locking member 61 have better ductility, the crucible is made of a steel strip, preferably made of carbon steel having a carbon content of 0.60% to 0.95%, so that it can be made difficult to secure the limit. Looseness occurs, and the ductility and life of the locking member 61 are optimized.

In order to make the locking member 61 in the locking position, the engagement with the limiting member 57 is more secure, and at least one protrusion is provided on the locking surface of the locking member 61, and the protrusion is used for the limitation The groove is engaged, and the number of the protrusions is preferably two, the limit is relatively stable and stable, and the process is simple. When the protrusion is engaged with the limiting groove, the region of the locking surface adjacent to the protrusion is also in close contact with the limiting member to cause the locking member 61 and the limiting member 57 to be The positional relationship is more stable.

It can be understood that the limiting portion of the limiting member 57 is not limited to the manner of using the limiting groove, and may also be a protrusion. The corresponding locking member 61 may be provided with a limiting groove to cooperate with the protrusion to realize the locking. The tightening mechanism 14 is in the locked state. Other modifications may be made by those skilled in the art in light of the teachings of the present invention. However, as long as the functions and effects thereof are the same or similar to the present invention, they should be covered by the scope of the present invention. In order to make the attachment shaft 67 more stable, one end of the coupling shaft 67 is attached to the adapter 59, and the other end is attached to the cover 65.

Referring to FIG. 3, FIG. 5 and FIG. 7 together, in order to prevent the loosening of the locking member 61 after a long time of use, the problem of the looseness of the limit is caused, and the connecting shaft 67 of the locking member 61 connected to the fitting 59 can be As an eccentric shaft, and by rotating the eccentric shaft, the distance of the eccentric axis of the eccentric shaft relative to the limiting member 57 is changed, thereby adjusting the tension of the locking member 61. That is, the connecting shaft 67 includes a connecting shaft limiting portion 69 extending along the central axis and having a circumferential tooth surface, and an eccentric portion 71 eccentrically extending from the connecting shaft limiting portion 69 and connecting the locking member 61, in the eccentric portion The connecting portion 73 is provided at an end portion away from the connecting shaft limiting portion 69, and the connecting portion 73 extends coaxially with the connecting shaft limiting portion 69. The connecting portion 73 is for mating with the cover 65. The fitting member 59 is attached to the shaft limiting portion 69 to be provided with a hole 75 that can be coupled to the shaft limiting portion 69. When the problem of looseness of the limit occurs, the user can take the connecting shaft 67 out of the hole 75 and rotate it around a central axis of the connecting shaft limiting portion 69, since the eccentric portion 71 and the connecting shaft limiting portion 69 are eccentric. The eccentric axis of the eccentric portion 71 is rotated relative to the central axis, and the distance between the eccentric axis and the limiting member 57 is changed, so that the locking member 61 can be further tensioned, so that the locking member 61 is locked. The cooperation with the limiting member 57 is closer.

The handle 11 is pivotally connected to the limiting member 57 of the housing 13 through the mating member 59, and the positional relationship is locked by the locking member 61. In order to make the connection between the handle 11 and the housing 13 more stable, The inner side of the connector 57 is provided with a smooth surface 58 which is always in contact with the outer surface of the limiting member 57, that is, the smooth surface 58 is always in contact with the outer surface of the limiting member 57 regardless of whether the locking mechanism 14 is in the locked or released state. . Corresponding recesses are provided corresponding to the outer surface of the limiting member 57, and the smooth surface 58 is in contact with the top end of the side wall of each of the limiting recesses. Thus, the connection between the handle 11 and the housing 13 is very stable. When the locking member 61 is in the locking position, the side of the limiting member 57 facing away from the locking member 61 will closely abut the smooth surface 58. The limit between the locking member 61 and the limiting member 57 provides a reaction force. When the locking member 61 is in the releasing position, the smooth surface 58 is in contact with the limiting member 57, so that the housing 13 is stably rotated relative to the handle 11. , so that there is no sway between the two, which improves the operation comfort.

Referring to Figures 3, 5 and 6, the operating member 63 can be operated to tension or loosen the locking member 61 such that the locking member 61 is in the locked or released position. In the present embodiment, the operating member 63 is a wrench having an operating portion at one end and a cylindrical pivot end at the other end, and has an operating member rotation axis V, and a rotating shaft 64 is eccentrically disposed at the pivot end and passes through The rotating shaft 64 is coupled to the locking member 61. Fuck The workpiece 63 has an operating member locking position and an operating member releasing position corresponding to the locking position and the releasing position of the locking member 61. When the user operates the operating portion of the operating member 63, the operating member 63 is rotated clockwise in the direction E with respect to the operating member rotational axis V of the pivoting end, and the rotating shaft 64 is rotated relative to the operating member rotational axis V. The protrusion of the driving locking member 61 is engaged with the limiting groove of the limiting member 57, even if the locking member 61 is in the locking position, the operating member 63 is in the locking position of the operating member; when the user operates the operating member The operating portion 63 rotates the operating member 63 counterclockwise with respect to the operating member rotation axis V in the direction F. At this time, the rotating shaft 64 cancels the pulling force on the locking member 61, so that the protrusion of the locking member 61 is disengaged from the limiting member. The limiting groove of 57, that is, the locking member 61 is in the release position, at this time the operating member 63 is in the operating member release position.

The rotation axis V of the operating member is parallel to the motor axis X, so that the operating member 63 drives the connecting end of the locking member 61 through the rotating shaft 64 to generate a radial displacement with respect to the motor axis X even if the locking member 61 is connected to the end of the operating member 63. The displacement of the handle 1 1 along the radial direction of the motor axis X causes the locking mechanism 14 to be in the locked state. Since the motor axis X is perpendicular to the extending direction of the reciprocating rod 29, the operating member rotational axis V is also perpendicular to the extending direction of the reciprocating rod 29, and the motor 25 and the locking mechanism 14 are respectively located on opposite sides of the reciprocating rod 29, thereby The structure of the whole machine is more compact and reasonable.

Of course, the operating member 63 is not limited to the above-described technical solutions, and those skilled in the art may also make other modified designs, such as a slide button having a position defining function, that is, at the mating member 59, under the technical suggestion of the present invention. a groove is circumferentially disposed, the sliding button is slidable in the groove, and a plurality of notches are formed in the side wall of the groove, and a plurality of protrusions are arranged on the button to cooperate with the notch, thereby defining the sliding Positioning the button, connecting one end of the locking member 61 to the sliding button, when the sliding button is operated at different positions, the driving locking member 61 can be brought into the locking position or Said release position. Of course, the reciprocating cutting tool 10 may also have one end portion of the locking member 61 originally connected to the operating member 63 protruding from the mating member 59 without the operating member 63, and a protrusion may be provided on the mating member 29 at the locking member 61. A portion of the extending portion of the fitting member 59 is provided with a through hole, and the user can manually operate the locking member 61 to match the through hole with the protrusion, so that the locking member 61 is in the locked position, and Operating the locking member 61 separates the through hole from the projection, so that the locking member 61 is in the released position. Of course, other modifications can be made by those skilled in the art, but as long as the functions and effects achieved by the same are the same or similar to the present invention, they should be covered by the scope of the present invention.

Referring to FIG. 3 , the cover 65 is configured to cooperate with the adapter 59 to form a receiving space, and is also used to cooperate with the connecting portion 73 of the fixed connecting shaft 67 and the operating member receiving portion 60 having the engaging member 59 . Corresponding accommodating portion (not shown) is used for partially accommodating the pivoting end of the operating member 63, so that the pivoting end of the operating member 63 is restricted by the operating member receiving portion 60 and the receiving portion, and The overall structure is more stable and reliable. By providing the cover 65, the mounting of the locking mechanism 14 can be made stronger, and dust can be prevented from contaminating the locking mechanism, thereby prolonging the service life of the locking mechanism 14, and at the same time making it more beautiful.

Referring to FIGS. 1 and 3, the battery pack 12 is partially housed in the grip portion 45, and a button 18 having a limit pin 16 is respectively disposed on opposite sides of the battery pack 12, and a reset is installed inside the button 18. The mechanism (not shown), when the battery pack 12 is mounted to the grip portion 45, is engaged with the protrusion (not shown) of the inner side wall of the grip portion 45 by the limit pin 16 to realize the limited battery. The position of the bag 12, when the user needs to remove the battery pack 12, presses the button 18 to disengage the limit pin 16 from the protrusion, and the battery pack 12 can be pulled out. This arrangement makes the battery pack 12 easy to assemble and disassemble, which is convenient for the user. In the present embodiment, the battery in the battery pack 12 is a battery, and the voltage of the battery pack 12 is 12V. At this time, the battery pack 12 has a small volume, which satisfies the miniaturization requirement of the tool, and can provide sufficient power for the cutting work. Thereby, the performance of the reciprocating cutting tool 10 is optimized.

Of course, the manner in which the battery pack 12 is mounted on the grip portion 45 is not limited to the above technical solution, and those skilled in the art may install the battery pack in other manners under the technical suggestion of the present invention, provided that the technical essence thereof is the same as the present invention. Or similar, should be covered by the scope of the present invention. Similarly, the voltage of the battery pack 12 in the present invention is not limited to 12V, and the battery installed therein is not limited to the lithium battery. Those skilled in the art can change the design according to actual needs, but as long as the functions and effects achieved are The same or similar inventions are intended to be covered by the scope of the invention.

Referring to FIG. 8 , a reciprocating cutting tool 100 according to a second embodiment of the present invention includes a handle 111 , a battery pack 112 mounted on the handle 111 , a housing 113 pivotally mounted on the handle 111 , and housed in the housing 113 . The inner motor (not shown), the reciprocating rod 129 driven by the motor, and the saw blade 117 mounted on the reciprocating rod 129.

The structure of the reciprocating cutting tool 110 is substantially the same as that of the reciprocating cutting tool 10 provided by the first embodiment of the present invention, except that the abutting plate 155 of the handle 111 has a receiving portion 176 for accommodating the electrical component, that is, the abutting plate 155. The inside is a hollow structure to form the accommodating portion 176, and a holding space 146 is formed between the accommodating portion 176 and the grip portion 145, so that the grip portion 145 and the accommodating portion 176 are arranged side by side, and the switch 147 is located at the grip portion 145 and Between the housing portions 176.

The accommodating portion 176 includes a battery pack accommodating portion 177 and a fan housing portion 179. Battery pack housing The portion 177 extends along the longitudinal direction of the abutting plate 155, and the extending direction of the battery pack receiving portion 177 is always perpendicular to the motor axis of the motor and parallel to the second abutting surface 156, which faces away from the saw blade 117. One end has an opening for the battery pack 112 to be inserted, and the position of the battery pack 112 is defined by a snap fit. Thus, the battery pack 112 can be easily disassembled, and when the reciprocating cutting tool 100 is switched between the first working state and the second working state, the battery pack 112 is not inconveniently disassembled due to a change in the operating state.

Thus, the battery pack 112 is disposed on the abutting plate 155, and only the control circuit board (not shown) is disposed in the grip portion 145. Since the size of the control circuit board is relatively small, the grip portion 145 is made. The inner diameter of the grip portion 145 is smaller than the inner diameter of the grip portion 45 in the first embodiment, so that the grip comfort of the handle 111 can be improved and improved. The space utilization of the board 155 makes the overall structure more reasonable.

The battery pack 112 is located between the second abutting surface 156 and the grip portion 145 such that the battery pack 112 does not extend beyond the second abutting surface 156, so that the second abutting surface 156 is not cut when it is cut against the workpiece. The impact of the battery pack 112.

It can be understood that since the inner portion of the abutting plate 155 has a hollow structure to form the receiving portion 176, the second abutting surface 156 can also be considered to be located on the receiving portion 176, that is, the receiving portion 176 faces away from the surface of the grip portion 145.

Of course, the position of the receiving portion 176 is not limited to being disposed on the abutting plate 155, and may be disposed on the side of the holding portion 145 away from the abutting plate 155, and is also connected by a structure similar to the supporting arm described in the present invention. Or the accommodating portion 176 is disposed at an end of the grip portion 145 away from the housing 113, and the extending direction of the accommodating portion 176 is substantially perpendicular to the extending direction of the grip portion 145, that is, the extending direction of the battery pack 112 is substantially perpendicular to the grip. The extending direction of the holding portion 145. In the above manner, the electrical components housed in the grip portion 145, such as a battery pack, can be disposed in the housing portion 176 outside the grip portion 145, so that the size of the grip portion 145 can be made smaller. The grip is more comfortable. Of course, those skilled in the art may also make other technical solutions, but as long as the functions and effects thereof are the same or similar to the present invention, they should be covered by the scope of the present invention.

Referring to FIG. 9 and FIG. 10 together, the fan receiving portion 179 is located at a side of the abutting plate 155 adjacent to the first supporting frame 115, that is, at an end of the receiving portion 176 opposite to the battery pack 112. The fan assembly 181 is used to perform dust blowing when the reciprocating cutting tool 100 is in the second operational state. Correspondingly, a fan inlet 183 is provided on a side of the fan housing portion 179 facing the grip portion 145, and an air outlet 184 is disposed on an end surface of the housing portion 176 facing away from the battery pack 112. When the reciprocating cutting tool 100 is in the second working state, cutting When cutting work, it can be blown by a separate fan assembly 181. Since the distance between the air outlet 184 and the saw blade 117 is relatively close, and when the airflow is blown from the air outlet 184 to the position where the saw blade 117 is cut, the flow direction of the airflow is smaller than the surface of the workpiece, so that the airflow is carried The debris generated by the cutting moves in a direction substantially parallel to the surface of the workpiece, which does not obstruct the user's line of sight, and also avoids the conventional dust blowing structure. The airflow is perpendicular to the surface of the workpiece, causing the dust to be driven by the reaction force to the vertical workpiece. The movement of the surface is easy to damage the eyes of the user.

In the present embodiment, referring to Fig. 12, the flow direction of the effective airflow blown from the air outlet 184 to the surface of the workpiece exists at an angular range from the surface of the workpiece. The maximum angle of the angle range is β, and the minimum angle is Υ, so that an effective dust blowing area is formed between the angle β and the angle γ, and the position where the saw blade 117 cuts the workpiece is within the angle range, so that the blowing The dust effect is optimal. The angle value of the angle β is selected from 20 degrees to 45 degrees, and the angle value of the angle γ is selected from 0 degrees to 20 degrees. Preferably, the angle angle of the angle β is 25 degrees, and the angle value of the angle γ is 10 degrees. .

Of course, the air outlet 184 can be closer to the second abutment surface 156, so that the airflow blown from the air outlet 184 is parallel to the surface of the workpiece, and also has a better dust blowing effect.

It can be understood that the manner in which the fan assembly 181 is installed is not limited to be mounted on the reciprocating cutting tool 100 disclosed in the embodiment. Those skilled in the art can select other cutting tools to be used in the present embodiment. The manner in which the fan assembly 181 is installed in the manner is the same as or similar to the present invention, and the same or similar functions and effects as the present invention are included in the scope of the present invention.

Referring to FIG. 9 and FIG. 10 together, in the present embodiment, the fan assembly 181 includes a fan case 185, a fan motor (not shown), and a turbine 187. Among them, the fan case 185 houses the fan motor and the turbine 187 inside, and can protect the internal structure. The fan motor is disposed at a center position of the turbine 187 to drive the turbine 187 to rotate during energization. The fan motor is a DC brushless motor. This setting effectively extends the life of the fan assembly 181 and provides a separate fan motor to drive the turbine 187 for improved blowing efficiency. The fan motor is connected to the battery pack 112 via the switch 147 and is controlled by the switch 147. When the switch 147 is triggered, the fan motor simultaneously operates to drive the turbine 187 for dust blowing.

Referring to FIG. 8 , the holding space 146 is located between the grip portion 145 and the receiving portion 176 for the user's finger to pass through the holding space 146 to achieve the grip portion 145 , or to achieve the above purpose. Contain the user's finger.

It can be understood that the accommodating portion 176 for accommodating electrical components disclosed in the embodiment is not in a state. Limited to the reciprocating cutting tool 100 installed in the present embodiment, it can also be mounted on other portable power tools such as portable electric circular saws, electric drills, electric hammers or screwdrivers, etc., here is not limited to the list - but only The technical solutions to be used are the same as or similar to the present invention, and the same or similar functions and effects are achieved, and should be covered by the scope of the present invention.

Referring to FIG. 1 1 , in order to improve the wear resistance of the surface of the handle 1 1 1 contacting the workpiece, the wearable coating may be provided on the surface of the contact plate 155 contacting the workpiece, or the surface may be 釆Made of wear resistant material. In the present embodiment, a pad 189 is disposed on the surface of the abutting plate 155 facing the workpiece, and the abutting plate 155 abuts against the surface of the workpiece through the pad 189, that is, the second abutting surface 156 is a pad. 1 89 Surface facing the workpiece. The backing plate 1 89 is made of a wear-resistant material such as plastic, metal or the like, preferably made of a metal material such as iron, stainless steel, aluminum alloy or copper.

In order to extend the service life of the reciprocating cutting tool 100, the backing plate 189 can be detachably mounted on the abutting plate 1 55, so that after the pad 1 89 is severely worn, it can be replaced in time to extend The service life of the reciprocating cutting tool 100.

Referring to FIG. 8 and FIG. 12 together, the cover 165 is provided with a receiving groove 168 for partially accommodating the operating member 163, and the receiving groove 168 extends in the circumferential direction of the motor axis X. The operating member 163 is disposed in the receiving slot 168. When the operating member 163 is in the locking position of the operating member, the operating member 163 is partially received in the receiving slot 1 68, so that the whole of the operating member 163 is located relative to the motor. Within the circumferential contour of the axis, a rational use of space is achieved, reducing the volume of the reciprocating cutting tool 100. Preferably, the operating member 163 has an operating end 170. When the operating member 163 is in the operating member locking position, the operating end 170 extends the fitting member 159 relative to the motor along a radial portion of the motor axis X. The circumferential contour of the axis X is convenient for the user to operate.

The reciprocating cutting tool of the present invention has a first working state and a second working state, and the area of the second working state against the surface of the workpiece is greater than the area of the workpiece in the first working state against the surface of the workpiece, so that In the working state, the workpiece is very stable and reliable, and is suitable for performing fine cutting work. When the reciprocating cutting tool is in the first working state, the area against the surface of the workpiece is relatively small, and is suitable for quickly cutting objects and the like. machining. This arrangement improves the overall performance of the reciprocating cutting tool and improves the operating comfort, which brings great convenience to the user.

The present invention is not limited to the foregoing embodiments, and other changes may be made by those skilled in the art in light of the spirit of the present invention. However, as long as the functions implemented are the same or similar to the present invention, they should be covered by the scope of the present invention. .

Claims

Claim

1. A reciprocating cutting tool for cutting workpieces, including:

Handle

a housing pivotally coupled to the handle, operatively rotatable relative to the handle to cause the reciprocating cutting tool to have a first operational state and a second operational state;

a motor housed in the housing;

a saw blade that is reciprocated by the driving of the motor;

It is characterized by:

The area of the reciprocating cutting tool that abuts against the surface of the workpiece in the second operational state is greater than the area of the workpiece in the first operational state against the surface of the workpiece.

2. The reciprocating cutting tool according to claim 1, wherein: said housing has a first abutting surface, said handle having a second abutting surface, said reciprocating cutting tool being in said first work In the state, only the first abutting surface abuts against the workpiece, and when the reciprocating cutting tool is in the second working state, the first abutting surface and the second abutting surface are common Relying on the workpiece.

3. The reciprocating cutting tool according to claim 2, wherein: when the reciprocating cutting tool is in the second working state, the first abutting surface and the second abutting surface are coplanar Relying on the workpiece.

4. The reciprocating cutting tool according to claim 2, wherein: when the reciprocating cutting tool is in the first working state, the first abutting surface and the second abutting surface intersect each other surface.

5. The reciprocating cutting tool according to claim 4, wherein: the first abutting surface and the second abutting surface are perpendicular when the reciprocating cutting tool is in the first working state.

6. The reciprocating cutting tool according to claim 2, wherein: the housing has a first support frame, the first abutting surface is located on the first support frame, and the handle comprises a grip portion And a second support frame having the second abutment surface.

7. The reciprocating cutting tool according to claim 6, wherein: the second support frame has an abutment plate capable of abutting against the workpiece, and the abutment plate is provided with a fan assembly, and the fan assembly is Dust is blown when the reciprocating cutting tool is in the second working state.

8. The reciprocating cutting tool of claim 7 wherein: said fan assembly is driven by a separate fan motor.

9. The reciprocating cutting tool according to claim 6, wherein: the second support frame has an abutment plate capable of abutting against the workpiece, and the abutment plate houses the fan assembly and the Electricity Machine-powered battery pack.

10. The reciprocating cutting tool according to claim 9, wherein: the battery pack is located between the second abutting surface and the grip portion.

The reciprocating cutting tool according to claim 10, wherein: the abutting plate has a receiving portion extending along the longitudinal direction and partially accommodating the battery pack, and the extending direction of the receiving portion is The motor axis is vertical.

The reciprocating cutting tool according to claim 11, wherein the battery pack is inserted into the accommodating portion from an end of the accommodating portion facing away from the saw blade.

13. The reciprocating cutting tool according to claim 6, wherein: the surface of the second support frame facing the workpiece is provided with a backing plate, and the second abutting surface is a surface of the backing plate facing the workpiece.

14. The reciprocating cutting tool according to claim 13, wherein: the material of the backing plate is plastic or metal.

15. The reciprocating cutting tool according to claim 1, wherein: when said reciprocating cutting tool is switched from said first working state to said second working state, its center of gravity is along said motor axis Radially close to the handle.

The reciprocating cutting tool according to claim 2, wherein: when the reciprocating cutting tool is in the first working state, the first abutting surface and the second abutting surface are not parallel surface.