CN110744136A - Hand-held band saw - Google Patents

Abstract

The invention relates to an electric tool, in particular to a handheld band saw, wherein a first guide mechanism, a second guide mechanism and a limiting mechanism are arranged on a shell assembly; the first guide mechanism comprises a first guide assembly and a second guide assembly, and the first guide assembly is matched with the second guide assembly and used for guiding the saw blade to move in the cutting area along the first cutting direction; the second guide mechanism comprises a third guide assembly and a fourth guide assembly, and the third guide assembly is matched with the fourth guide assembly and used for guiding the saw blade to move in the second cutting direction in the cutting area; the limiting mechanism is arranged adjacent to the first guide mechanism. Stop gear's design is used for preventing the saw blade to cross the second cutting position, makes the saw blade even running, avoids the saw blade skew, and leads to the unable normal cutting of hand-held band saw.

Description

Hand-held band saw

Technical Field

The invention relates to an electric tool, in particular to a handheld band saw.

Background

At present, the hand-held band saw is widely applied and can be used for cutting all machinable metals including stainless steel, pipes, solid bodies and the like. Has strong heat resistance, abrasion resistance and shock resistance, and has the longest service life compared with similar products. Because of its advantages of flexible and convenient use, it has been widely used in the industry, family and other occasions where various bars, pipes and sections are cut off.

In order to ensure the requirement of a cutting section on the cutting depth of a material to be cut, a band saw in the prior art needs to form a certain angle relative to the direction of the circular motion of the saw blade, and in order to play a better guiding role for the saw blade in work, a group of guiding assemblies are respectively and correspondingly arranged on two sides of the cutting section to control the motion angle of the saw blade; however, in the case of the hand-held band saw, in the actual cutting process, the saw blade may be displaced by a reaction force against the workpiece to be cut.

Disclosure of Invention

In order to solve the above problems, the present invention provides a novel hand-held band saw.

The invention provides the following technical scheme: a hand-held band saw comprising: the shell assembly comprises a first shell, a second shell and a third shell, wherein the second shell is arranged at an interval with the first shell, the third shell is connected with the first shell and the second shell, and a cutting area is formed among the first shell, the second shell and the third shell; the first rotating wheel is at least partially arranged in the first shell and can rotate relative to the first shell; the second rotating wheel is at least partially arranged in the second shell and can rotate relative to the second shell; the motor is arranged in the third shell and can drive one of the first rotating wheel and the second rotating wheel to rotate; the saw blade is connected with the first rotating wheel and the second rotating wheel; a first guide mechanism coupled to the housing assembly, the first guide mechanism comprising: a first guide assembly mounted to the first housing and a second guide assembly mounted to the second housing, the first guide assembly cooperating with the second guide assembly for guiding the saw blade in a first cutting direction within the cutting zone; a second guide mechanism coupled to the housing assembly, the second guide mechanism comprising: a third guide assembly mounted to the first housing and a fourth guide assembly mounted to the second housing, the third guide assembly cooperating with the fourth guide assembly for guiding the saw blade in a second cutting direction within the cutting zone; and a limiting mechanism mounted to the housing assembly and adjacent the first guide mechanism, the saw blade being movable from a first cutting position to a second cutting position when the saw blade in the cutting zone moves in a first cutting direction, the limiting mechanism being configured to prevent the saw blade from passing the second cutting position.

Optionally, stop gear includes: the first limiting piece can rotate around a first rotation axis and is connected to the first shell; a second limiting member which can rotate around a second rotation axis parallel to the first rotation axis and is connected to the second housing; the saw blade is in a second cutting position, the saw blade is at least partially contacted with the first limiting piece, and the saw blade is at least partially contacted with the second limiting piece; wherein at least part of the saw blade at the position contacted with the first limiting member intersects with the direction of the first rotating axis, and at least part of the saw blade at the position contacted with the second limiting member intersects with the direction of the second rotating axis.

Optionally, the first rotating wheel and the second rotating wheel are arranged substantially symmetrically relative to a bisecting plane passing through the cutting region; the first guide assembly and the second guide assembly are basically symmetrically arranged along the bisection plane; the first limiting piece and the second limiting piece are basically symmetrically arranged along the middle dividing plane.

Optionally, the first guide assembly comprises: a first guide rotatable about a first axis of rotation;

the second guide assembly includes: a second guide rotatable about a direction parallel to the first axis of rotation; wherein the direction of the first axis of rotation intersects the direction of the first axis of rotation.

Optionally, the direction of the first axis of rotation is perpendicular to the direction of the first axis of rotation.

Optionally, the third guiding component comprises: a third guide rotatable about a second axis of rotation;

a fourth guide member adjacent the third guide member, rotatable about a direction substantially parallel to the second axis of rotation; the fourth guide assembly includes: a fifth guide member disposed substantially symmetrically to the third guide member along the bisecting plane and rotatable about a direction substantially parallel to the second axis of rotation; a sixth guide member adjacent to the fifth guide member, disposed substantially symmetrically to the fourth guide member along the bisecting plane, and rotatable about a direction substantially parallel to the second axis of rotation; the preset angle formed by the first rotating axis and the second rotating axis ranges from 20 degrees to 55 degrees.

Optionally, the hand-held band saw further comprises: middle coupling assembling, fixed connection to the casing subassembly, middle coupling assembling includes: a first connecting part fixedly connected to the first housing and a second connecting part fixedly connected to the second housing; the first guide assembly is mounted to the first connection portion and the second guide assembly is mounted to the second connection portion; the first limiting piece is mounted to the first connecting portion, and the second limiting piece is mounted to the second connecting portion.

Optionally, the hand-held band saw further comprises: a connection assembly fixedly connected to the housing assembly, the connection assembly comprising: a first connecting part fixedly connected to the first housing and a second connecting part fixedly connected to the second housing; the first guide assembly is mounted to the first connection portion and the second guide assembly is mounted to the second connection portion; the first shell comprises a first extension part, and the first limiting part is installed on the first extension part; the second shell comprises a second extending part, and the second limiting part is installed on the second extending part.

Optionally, the first guide member, the second guide member, the third guide member, the fourth guide member, the fifth guide member, the sixth guide member, the first limiting member, and the second limiting member are all rolling bearings.

Optionally, the housing assembly includes a first housing, a second housing spaced apart from the first housing, and a third housing connecting the first housing and the second housing, and a cutting area is formed between the first housing, the second housing, and the third housing; the first rotating wheel is at least partially arranged in the first shell and can rotate around a first central axis; the second rotating wheel is at least partially arranged in the second shell and can rotate around the second central axis; the motor is arranged in the third shell and can drive one of the first rotating wheel and the second rotating wheel to rotate; the saw blade is connected with the first rotating wheel and the second rotating wheel; a first guide mechanism coupled to the housing assembly, the first guide mechanism comprising: a first guide assembly mounted to the first housing and a second guide assembly mounted to the second housing, the first guide assembly cooperating with the second guide assembly for guiding the saw blade in a first cutting direction within the cutting zone; and a limiting mechanism mounted to the housing assembly and adjacent to the first guide assembly for preventing the saw blade from passing over a predetermined position when the saw blade moves in the first cutting direction in the cutting zone.

The invention has the advantages that: the hand-held band saw in this application guarantees that hand-held band saw is at the in-process that uses through setting up stop gear, can not appear leading to the unable normal use condition of machine because of the serious skew of saw blade.

Drawings

FIG. 1 is a perspective view of a second cutting direction of the hand-held band saw;

FIG. 2 is a perspective view of the hand-held band saw of FIG. 1 in a first cutting direction;

FIG. 3 is a perspective view of the hand-held band saw of FIG. 1 from another perspective;

FIG. 4 is a perspective view of the back of the hand-held band saw of FIG. 1;

FIG. 5 is a schematic view of the adjustment mechanism of the hand-held band saw of FIG. 1 in a second position;

FIG. 6 is a front view of the hand-held band saw of FIG. 1;

FIG. 7 is a schematic view of the first and second guide mechanisms of the hand-held band saw of FIG. 1;

FIG. 8 is a schematic view of the auxiliary handle of the hand-held band saw of FIG. 1 in a middle position of the handle;

FIG. 9 is a schematic view of the auxiliary handle of the hand-held band saw of FIG. 1 in a first extreme position

FIG. 10 is a schematic view of the auxiliary handle of the hand-held band saw of FIG. 1 in a second extreme position;

FIG. 11 is a schematic view of the adjustment mechanism of the hand-held band saw of FIG. 1 in a first position;

FIG. 12 is a cross-sectional view taken along line A-A of FIG. 11;

FIG. 13 is a schematic view of the adjustment mechanism of the hand-held band saw of FIG. 1 in an intermediate position;

FIG. 14 is a schematic view of the adjustment mechanism of the hand-held band saw of FIG. 1 in a second position;

FIG. 15 is a schematic view of the adjustment device of the hand-held band saw of FIG. 1 shown in a force collapsed state;

FIG. 16 is an enlarged view of a portion of the device shown in FIG. 1;

FIG. 17 is an enlarged view of a portion of the device shown in FIG. 2;

FIG. 18 is an enlarged view of a portion of FIG. 3;

FIG. 19 is an enlarged view of a portion of the view shown in FIG. 4;

FIG. 20 is an exploded view of the auxiliary handle of the hand-held band saw of FIG. 1;

FIG. 21 is a schematic view of the actuator assembly of the hand-held band saw of FIG. 20;

fig. 22 is a cross-sectional view taken along line B-B of fig. 21.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1 to 4, in an embodiment of the present invention, there is provided an electric tool, specifically, a handheld band saw, in which a handheld band saw 100 of the present invention includes: the housing assembly 110, the first rotating wheel 116, the second rotating wheel 117 and the motor (not shown in the figure) are arranged in the housing assembly 110, the handle 120 is connected to the housing assembly 110, the auxiliary handle 130 is rotatably connected to the housing assembly 110, the auxiliary grip portion 134 is connected to the auxiliary handle 130, the adjusting device 140, the first guiding mechanism 150, the limiting mechanism 170 and the actuating device 220 are mounted to the connecting assembly 110, and the saw blade 180 is connected with the first rotating wheel 116 and the second rotating wheel 117.

Further, the housing assembly 110 includes: a first housing 111, a second housing 112 spaced apart from the first housing 111, and a third housing 113 connecting the first housing 111 and the second housing 112. A cutting area 114 is formed between the first housing 111, the second housing 112 and the third housing 113.

A first rotating wheel 116 is partially disposed within the first housing 111, the first rotating wheel 116 being rotatable about the first central axis 101. The second rotating wheel 117 is partially disposed within the second housing 112, and the first rotating wheel 116 is rotatable about the second central axis 102. Of course, the first rotating wheel 116 and the second rotating wheel 117 may be completely disposed in the first housing 111 and the second housing 112, respectively.

The motor may also be disposed in the first housing 111, the second housing 112, or the third housing 113, in this embodiment, the motor is disposed in the third housing 113, and in particular, the third housing 113 forms an accommodating space, and the motor is disposed in the accommodating space, and the motor is configured to drive the first rotating wheel 116 to rotate the first rotating wheel 116 relative to the first housing 111, and drive the second rotating wheel 117 to rotate relative to the second housing 112 through the saw blade 180. It will also be appreciated that the motor can also be used to drive the second rotating wheel 117 to rotate the second rotating wheel 117 relative to the second housing 112, and the first rotating wheel 116 is driven to rotate relative to the first housing 111 by the saw blade 180.

Referring to fig. 5, the adjusting device 140 is connected to the first housing 111 and is partially disposed in the cutting area 114, and the adjusting device 140 includes a fixing member 141, a sliding member 142, a fence member 143, and a connecting member 144. In the embodiment, the fixing member 141 is provided with a plurality of through holes 1411, and the screws pass through the through holes 1411 and are fixed to the first housing 111. The sliding member 142 is slidably connected to the fixed member 141, that is, the sliding member 142 can reciprocate or be releasably held at a position in the first sliding direction a relative to the fixed member 141. The fence 143 is used for abutting against a cutting workpiece, the fence 143 is connected with the sliding member 142 through the connecting assembly 144, and the connecting assembly 144 is fixedly connected with the sliding member 142, that is, it can be understood that when the sliding member 142 moves, the fence 143 can move along with the sliding member 142, so that the fence 143 is at different positions in the first sliding direction a, and the height of the fence 143 is adjusted through the sliding member 142 to match different cutting workpieces.

Referring to fig. 11 to 14, when the fence 143 moves in the first sliding direction a, there are at least two positions: a first position and a second position, between which the fence 143 moves. Of course, depending on the operating conditions, one or several intermediate positions between the first position and the second position may also be present.

The adjusting device 140 further includes: the control assembly 145 is used for the user to actuate the slide 142 to move the fence 143 between the first position and the second position, or to maintain the fence 143 in one of the first position, the second position, or the intermediate position. Specifically, the fixing member 141 is provided with a plurality of clamping grooves 1412. The control assembly 145 includes: a control button 1451, a stopper 1452, and an elastic member 1453. The elastic member 1453 is connected to the control button 1451, and the elastic member 1453 may be a spring in this embodiment. The control button 1451 is used for a user to operate, and when the control button 1451 is in an original state and the stopper 1452 is engaged with the engaging groove 1412, the grid member 143 is relatively and fixedly maintained at a position of the first position, the second position or the middle position, wherein the original state refers to a state where the spring is not deformed by a force in this embodiment. When the user presses the control button 1451, the stopper 1452 is disengaged from the catching groove 1412, so that the slider 142 can freely move with respect to the fixing member 141. When the control button 1451 loses external force, the control button 1451 can be restored to an original state by the force of the elastic member 1453. Specifically, the control button 1451 is integrally formed with the stopper 1452 and rotates about the rotation axis 103. The same control button 1451 and stop 1452 can also be fixedly connected and rotate about the rotation axis 103. In this embodiment, the first position is a home position (as shown in fig. 11), that is, a position where the fence 143 is disposed near the third housing 113 in the first sliding direction a, and the stopper 1452 is engaged with the engaging groove 1412. The second position is an extended position (as shown in fig. 14) in which the fence 143 is used to engage a larger cut workpiece, i.e., a position in which the fence 143 is disposed away from the third housing 113 in the first sliding direction a, and the stopper 1452 is engaged with the engagement groove 1412. The intermediate position refers to a position between the original position and the extended position, and the stopper 1452 is caught with the catching groove 1412 (as shown in fig. 13). The intermediate position is not necessarily limited to the position between the first position and the second position, and the position where the stopper 1452 is engaged with the engaging groove 1412 may also be the first position or the second position. The disengaged position refers to a position in which the stopper 1452 is not engaged with the engagement groove 1412 and is between the first position and the second position. When the user presses the control button 1451 to adjust the position of the fence 143, the user may perform a normal operation of adjusting the fence 143 to be in any one of the first position, the second position, or the middle position, or may perform an irregular operation of adjusting the fence 143 to be in the non-coupling position. Therefore, the height of the grid member 143 can be adjusted by changing the corresponding relationship between the control button 1451 and the different clamping grooves 1412, without using an external tool, which is more convenient and labor-saving and has better experience.

Referring to fig. 15, when the fence 143 is located at the middle position, and the handheld band saw 100 is accidentally dropped, and the fence 143 contacts the ground or other objects, the fence 143 is subjected to a large external force, and the fence 143 is stressed and collapsed in the first sliding direction a, that is, the fence 143 moves in a direction approaching the third housing 113 along the first sliding direction a, that is, the fence 143 moves to the third position at the middle position, so as to prevent the fence 143 from directly and rigidly colliding with the ground or other objects, and achieve the purpose of preventing the falling and the damage. When the fence 143 is at the third position and the external force applied to the fence 143 disappears, the connecting assembly 144 can generate a buffering force opposite to the moving direction, so that the fence 143 moves from the third position to the middle position, thereby preventing the user from adjusting the fence 143 again, and greatly improving the convenience of operation. The third position is between the first position and the second position, the third position refers to the farthest position where the grill 143 can move toward the third housing 113 under the condition of being subjected to a large external force, and the specific position of the third position is not determined because the magnitude of the external force applied each time is not determined, which is determined by the situation.

As an alternative embodiment, the connecting assembly 144 includes a buffer 1441 for restoring the fence 143, the buffer 1441 is disposed between the sliding element 142 and the fence 143 and arranged in a direction parallel to the first sliding direction a, specifically, the sliding element 142 has a receiving groove 1421 and a connecting portion 1422, the connecting portion 1422 is disposed on one side of the receiving groove 1421, the buffer 1441 is at least partially disposed in the receiving groove 1421, one end of the buffer 1441 is connected to the connecting portion 1422, and the other end of the buffer 1441 is connected to the fence 143. Due to the buffer 1441, when the leaning grid 143 falls or collides with an object rigidly to generate stress collapse, the leaning grid 143 can retract and slide to a certain extent in the stress collapse direction, so as to avoid the falling damage of the leaning grid 143 or the falling damage of the control assembly 145.

Further, the connecting assembly 144 further includes a guide rod 1442, and the guide rod 1442 is disposed along the first direction and fixedly connected to the sliding member 142, so that when the sliding member 142 moves, the guide rod 1442 can move along with the sliding member 142. Specifically, a pin may be used to connect the sliding member 142 and one end of the guiding rod 1442, and of course, other ways may also be used to fixedly connect the guiding rod 1442 and the sliding member 142, for example, an external thread is provided at one end of the guiding rod 1442, an internal thread is provided in the connecting portion 1422, and the guiding rod 1442 is in threaded connection with the connecting portion 1422. The other end of the guide rod 1442 is movably connected to the fence 143 for limiting the fence 143 from moving freely away from the guide rod 1442, and the fence 143 has a protrusion 1431, the protrusion 1431 extends in a direction perpendicular to the first sliding direction a, and the other end of the guide rod 1442 passes through the protrusion 1431 and engages with a pin, so that the protrusion 1431 cannot be separated from the guide rod 1442. In the present invention, the buffer 1441 may be a spring, and the spring is sleeved on the guide rod 1442, wherein one end of the spring abuts against the buffer 1441, and the other end abuts against the protrusion 1431. The improved adjusting device 140 has the advantages of simple structure, low preparation cost and convenient operation, and is suitable for popularization and use.

Referring to fig. 1-5, a first guide mechanism 150 is coupled to the housing assembly 110 for guiding the movement of the saw blade 180 in a first cutting direction b within the cutting zone 114. Stop mechanism 170 is coupled to housing assembly 110 and is configured to prevent blade 180 from passing a predetermined position, preventing blade 180 from cutting properly, and also to support blade 180 to facilitate proper operation of the machine.

As a possible embodiment, the first guiding mechanism 150 includes a first guiding assembly 151 and a second guiding assembly 152, the first guiding assembly 151 is mounted to the first housing 111, the second guiding assembly 152 is mounted to the second housing 112, and the first guiding assembly 151 and the second guiding assembly 152 cooperate with each other to move the saw blade 180 in the first cutting direction b in the cutting area 114.

When the hand-held band saw 100 is operated, i.e. the saw blade 180 in the cutting zone 114 is moved in the first cutting direction b, the saw blade 180 will move from the first cutting position to the second cutting position, the stop mechanism 170 preventing the saw blade 180 from passing the second cutting position. Wherein the first cutting position refers to the position of the saw blade 180 mounted on the first guide mechanism 150, and the second cutting position is referred to as a predetermined position, i.e. the position of the saw blade 180 closest to the position-limiting mechanism 170, which can move on the first guide mechanism 150 under the action of the position-limiting mechanism 170, it can be easily found in practical use that the first cutting position is not fixed due to each mounting or operation, and of course, there is a case that the first cutting position coincides with the second cutting position, i.e. the initial position of the saw blade 180 on the first guide mechanism 150 is the second cutting position of the saw blade 180. The design is used for preventing the saw blade 180 from continuously generating offset movement when moving so as to avoid the situation that the saw blade 180 crosses the second cutting position, ensure the normal use of the handheld band saw 100, avoid the equipment fault caused by the separation of the saw blade 180, influence the normal operation of the equipment, increase the cost of post-repair and maintenance and slow the work efficiency.

Referring to fig. 16 and 17, the limiting mechanism 170 includes a first limiting member 171 and a second limiting member 172. The first limiting member 171 is connected to the first housing 111, and the first limiting member 171 can rotate around the first rotation axis 104, and the second limiting member 172 is connected to the second housing 112, and the second limiting member 172 can rotate around the second rotation axis 105 parallel to the first rotation axis 104. When the saw blade 180 is in the second cutting position, i.e., the saw blade 180 is at least partially in contact with the first limiting member 171, and the saw blade 180 is also at least partially in contact with the second limiting member 172, at least a portion of the saw blade 180 at the position in contact with the first limiting member 171 intersects the direction of the first rotation axis 104, and at least a portion of the saw blade 180 at the position in contact with the second limiting member 172 intersects the direction of the second rotation axis 105, it can be understood that the saw blade 180 at the position in contact with the saw blade 180 at the first limiting member 171 intersects the direction of the first rotation axis 104, and the saw blade 180 at the position in contact with the saw blade 180 at the second limiting member 172 intersects the direction of the second rotation axis 105. The blade 180, also at the location where the first retaining member 171 contacts the blade 180, is perpendicular to the direction of the first rotational axis 104, while the blade 180, at the location where the second retaining member 172 contacts the blade 180, is perpendicular to the direction of the second rotational axis 105. As an alternative embodiment, the saw blade 180 includes a back 181, a blade (not shown), a first side (not shown), and a second side 182. The saw back 181 is disposed opposite a saw blade for cutting a workpiece, and the first side is disposed opposite the second side 182 and at least partially contacts the first guide 150. When the saw blade 180 is located at the second cutting position, the saw back 181 is at least partially in contact with the first position-limiting member 171, and at this time, the second side surface 182 at the position where the saw back 181 is in contact with the first position-limiting member 171 is substantially parallel to the first surface 1711 of the first position-limiting member 171, while the saw back 181 is at least partially in contact with the second position-limiting member 172, and similarly, the second side surface 182 at the position where the saw back 181 is in contact with the second position-limiting member 172 is substantially parallel to the second surface 1721 of the second position-limiting member 172. Thereby, the machine can be better kept to operate stably. As another alternative, when the saw blade 180 is located at the second cutting position, the saw back 181 is at least partially in contact with the first limiting member 171, a plane passing through the first limiting member 171 and perpendicular to the first rotation axis 104 is substantially parallel to the second side surface 182 at the position where the saw back 181 is in contact with the first limiting member 171, the saw back 181 is at least partially in contact with the second limiting member 172, and a plane passing through the second limiting member 172 and perpendicular to the second rotation axis 105 is substantially parallel to the second side surface 182 at the position where the saw back 181 is in contact with the second limiting member 172.

The hand-held band saw 100 also includes a second guide mechanism 160 for guiding the movement of the saw blade 180 in the second cutting direction within the cutting zone 114, the second guide mechanism 160 being coupled to the housing assembly 110. Specifically, the second guiding mechanism 160 includes a third guiding assembly 161 and a fourth guiding assembly 162. The third guiding assembly 161 is connected to the first housing 111, the fourth guiding assembly 162 is connected to the second housing 112, the third guiding assembly 161 and the fourth guiding assembly 162 are matched with each other, so that the saw blade 180 moves along the second cutting direction c in the cutting area 114, and by adding a group of guiding mechanisms, a user can adjust the assembly mode as required in actual operation, and by using the formed cutting path of the multi-angle handheld band saw 100, under the special condition that the conventional handheld band saw 100 cannot cut or is inconvenient to cut, the angle of the saw blade 180 of the cutting section is changed by switching the installation path, and smooth operation of cutting work is ensured.

The first rotating wheel 116 and the second rotating wheel 117 are substantially symmetrically disposed with respect to the bisecting plane P2 passing through the cutting region 114, and it can be specifically understood that the first housing 111 and the second housing 112 are substantially symmetrically disposed with respect to the bisecting plane P2, so that the first guide assembly 151 and the second guide assembly 152 are substantially symmetrically disposed along the bisecting plane P2, the third guide assembly 161 and the fourth guide assembly 162 are substantially symmetrically disposed along the bisecting plane P2, and the first retaining member 171 and the second retaining member 172 are also substantially symmetrically disposed along the bisecting plane P2.

Referring to fig. 6 to 7 together, the first guide assembly 151 includes a first guide member 1511, the second guide assembly 152 includes a second guide member 1521, the first guide member 1511 rotates about the first rotation axis 106, the first rotation axis 106 intersects the first rotation axis 104, because the first guide assembly 151 and the second guide assembly 152 are disposed substantially symmetrically along the bisecting plane P2, the second guide member 1521 rotates in a direction parallel to the first rotation axis 106, and the first rotation axis 106 intersects the second rotation axis 105. preferably, the first rotation axis 106 is perpendicular to the first rotation axis 104, which is convenient for machining of the machine, the third guide assembly 161 includes a third guide member 1611 and a fourth guide member 1612, the third guide member 1611 rotates about the second rotation axis 107, the fourth guide axis is adjacent to the third guide member 1611, and the fourth guide member 1611 rotates about a direction substantially parallel to the second rotation axis 107, the fourth guide member 180 rotates about a direction 1621, which is substantially parallel to the second rotation axis 107, and the fourth guide member 1621 is disposed substantially parallel to the fifth guide axis 1622, wherein the second guide member 1621 is disposed substantially parallel to the fifth guide axis 1621, the second guide member 1621, the fourth guide member 1621 is disposed substantially parallel to the fifth guide axis 1622, and the fourth guide member 1622, which is substantially parallel to the second guide axis 1622, which is substantially parallel to the second guide assembly 1626, and the fourth guide member 1622, wherein the fourth guide member 1626 is disposed substantially parallel to the second guide axis 1626, and the fourth guide member 1622, which is disposed substantially parallel to the second guide member 1622, and the fourth guide member 1622, wherein the second guide member 120 is disposed substantially parallel to the second guide axis 1626, and the second guide member 120 is disposed substantially parallel to the cutting direction of the cutting blade 120, and the cutting blade 107, wherein the cutting direction of the cutting blade 120, and the cutting blade may be substantially parallel to the cutting direction of the cutting blade 120, and the cutting direction of the cutting blade may be substantially parallel to the cutting blade 120, and the cutting direction of the cutting blade 120, wherein the cutting blade 120, and the cutting blade may be disposed substantially parallel to the cutting direction, and the cutting blade may be disposed substantially parallel to the cutting blade 120, wherein the cutting blade when the cutting blade 120, the cutting blade may be disposed substantially parallel to the cutting blade 120, the cutting blade 120.

The first and second guide mechanisms 150 and 160 are coupled to the intermediate coupling assembly 190, and the intermediate coupling assembly 190 is fixedly coupled to the housing assembly 110. Specifically, the middle connection assembly 190 includes a first middle connection portion 191 and a second middle connection portion 192. The first and second guide assemblies 151 and 152 are mounted to the first and second intermediate connection portions 191 and 192, respectively, the first and second intermediate connection portions 191 and 192 are mounted to the first and second housings 111 and 112, respectively, and the third and fourth guide assemblies 161 and 162 are mounted to the first and second intermediate connection portions 191 and 192, respectively. More specifically, the first intermediate connecting portion 191 may be fastened to the first housing 111 with a screw, and the second intermediate connecting portion 192 may also be fastened to the second housing 112 with a screw. The limiting mechanism 170 is connected to the intermediate connecting assembly 190, and the first limiting member 171 and the second limiting member 172 are connected to the first intermediate connecting portion 191 and the second intermediate connecting portion 192, respectively.

As another alternative, as shown in fig. 8, the first housing 111 includes a first extending portion 1111, the second housing 112 includes a second extending portion 1121, the first limiting member 171 and the second limiting member 172 are respectively connected to the first extending portion 1111 and the second extending portion 1121, and the first guiding mechanism 150 and the second guiding mechanism are connected to the middle connecting assembly 190. Specifically, the first and second guide assemblies 151 and 152 are mounted to the first and second intermediate connection portions 191 and 192, respectively, and the third and fourth guide assemblies 161 and 162 are mounted to the first and second intermediate connection portions 191 and 192, respectively.

Specifically, the first guide 1511, the second guide 1521, the third guide 1611, the fourth guide 1612, the fifth guide 1621, the sixth guide 1622, the first stopper 171, and the second stopper 172 are all rolling bearings, the first guide 1511, the third guide 1611, and the fourth guide 1612 are assembled to the first intermediate connection portion 191 by screws, and the second guide 1521, the fifth guide 1621, and the sixth guide 1622 are assembled to the second intermediate connection portion 192 by screws.

Referring to fig. 1 to 6, the first housing 111 is formed with a first housing surface 1112, the second housing 112 is formed with a second housing surface 1122, and two ends of the handle 120 are fixedly connected to the first housing surface 1112 and the third housing 113, respectively, although two ends of the handle 120 may also be integrally formed with the first housing surface 1112 and the third housing 113, respectively. The first rotating wheel 116 and the second rotating wheel 117 are respectively disposed under the first housing surface 1112 and the second housing surface 1122, and the handle 120 is located above the first housing surface 1112.

The auxiliary handle 130 is rotatably connected to the second housing 112, but the auxiliary handle 130 may be rotatably connected to the third housing 113. Specifically, the auxiliary handle 130 includes: according to the above arrangement, when the handheld band saw 100 is operated, a user can place a hand held on the auxiliary handle 130 on the auxiliary holding portion 134, so that the body of the handheld band saw 100 is kept stable, the phenomenon that the cut of a workpiece is uneven due to the left and right shaking of the body caused by vibration during cutting can be prevented, and the hand originally placed on the auxiliary handle can be placed on the auxiliary holding portion, the holding hand is released, so that the operation is easier and more labor-saving.

Optionally, the auxiliary grip portion 134 is fixedly connected to or integrally formed with the extension portion 137, that is, the auxiliary grip portion 134 can rotate relative to the housing assembly 110, and in operation, a user holds the handle 120 with one hand and places the other hand on the auxiliary grip portion 134, and the hand-controlled activation device 220 on the handle 120 activates the handheld band saw 100 to perform a cutting operation. And the user performs real-time operation adjustment according to the actual operation position of the cutting workpiece. The auxiliary holding part 134 is additionally arranged on the structural basis of the auxiliary handle 130, so that when a user cuts a workpiece, the user can move away the original arm for lifting and pressing the auxiliary handle 130 to apply force, the condition that the arm blocks the sight line is avoided, and particularly when the workpiece needing to be cut is at a low position and the user needs to bend down to operate, the arm for lifting and pressing the auxiliary handle 130 can easily shield the view of the user, and the cutting accuracy of the user is influenced.

Optionally, the handle 120 has a handle bisecting plane P1, and the first grip portion 131 and the second grip portion 132 are each disposed substantially parallel to the handle bisecting plane P1. Wherein the handle bisecting plane P1 intersects the first housing surface 1112 at an angle in the range of 135 degrees to 155 degrees, preferably 140 degrees to 150 degrees, and the handle bisecting plane P2 is substantially parallel to the second cutting direction c, i.e., when the user is operating the hand-held band saw 100 to cut a workpiece along the second cutting direction c, the handle 120 extends in a direction that is consistent with the direction of gravity of the machine at that time, thereby increasing the user experience of the user while enabling the hand-held band saw 100 to operate smoothly and cut normally.

The handle 120 has a handle operating portion 126 for a user to operate the hand-held band saw 100. By providing the hand-held band saw 100 with a predetermined plane P3, the first housing surface 1112 and the second housing surface 1122 are at least partially within the predetermined plane P3, and the maximum distance from the handle 120 to the predetermined plane P3 in a direction perpendicular to the predetermined plane P3 is greater than the maximum distance from the auxiliary grip 134 to the predetermined plane P3 in a direction perpendicular to the predetermined plane P3. The auxiliary grip portion 134 is disposed on the upper side of the predetermined plane P3, and is disposed on the lower side of the handle operation portion 126, i.e., the side of the auxiliary grip portion 134 adjacent to the first housing surface 1112, which is lower than the handle operation portion 126 when the user holds the handle operation portion 126 with one hand, i.e., the other hand originally held on the auxiliary handle 130, i.e., the user can hold the auxiliary grip portion 134 adjacent to the first housing surface 1112, which is lower than the handle operation portion 126, i.e., when the user holds the hand-held band saw 100, the height of the machine can be reduced, the gravitational potential energy of the machine in the gravitational.

The user grips the auxiliary grip part 134 and also gives an auxiliary force to the main body of the hand-held band saw 100 from the lateral direction, so that the user can feel easier and more labor-saving in operation, the user does not need to difficultly lift or lower the main body, and the user can select to hold the grip top face 1345 of the auxiliary grip part 134 to keep the stability of the main body; the auxiliary grip 134 may be lifted from the gap between the second housing face 1122 and the auxiliary grip 134 to stabilize the machine body and complete the machining operation. Based on the design of the auxiliary holding portion 134, the original vertical force is changed into the lateral auxiliary supporting force, which is more beneficial to keeping the stability of the body of the handheld band saw 100 during cutting and preventing the uneven cut of the workpiece caused by the left-right shaking of the body caused by vibration during cutting.

Referring to fig. 6, 9, 10, 18 and 19, the auxiliary grip portion 134 includes a first grip side 1341, a second grip side 1342 and a grip bottom 1346, wherein the first grip side 1341 is disposed adjacent to the second grip side 1342, and specifically, the extension 137 of the auxiliary handle 130 has an extension end, and the extension end is fixedly connected to or integrally formed with a portion of the first grip side 1341 adjacent to the second grip side 1342, so as to facilitate processing. Further, the hand-held band saw 100 further includes a battery pack 135 for supplying power to the hand-held band saw 100, and particularly, the battery pack 135 has a connection port which is coupled with a connection socket provided on the third housing 113. The second housing face 1122 has a central surface 1123, and the central surface 1123 extends within the predetermined plane P3. Wherein the auxiliary handle 130 is rotatable about the rotation axis 108, there is a first limit position where the auxiliary handle 130 contacts the second housing 112 (as shown in fig. 9) and a second limit position where the auxiliary handle 130 contacts the battery pack 135 (as shown in fig. 10) during the rotation of the auxiliary handle 130, and there is at least one handle middle position (as shown in fig. 6) between the first limit position and the second limit position, such that the grip bottom surface 1346 is substantially parallel to the central surface 1123 of the second housing surface 1122. As another embodiment, the holding bottom surface 1346 of the auxiliary holding portion 134 is partially within the holding plane P4, it is understood that the holding bottom surface 1346 is not a plane but may have other shapes, wherein the holding bottom surface 1346 is partially within the holding plane P4, i.e., the holding plane P4 rotates with the auxiliary holding portion 134, the holding plane P4 also has a first limit position and a second limit position during the rotation, and a middle position of the handle exists between the first limit position and the second limit position, such that the holding plane P4 is substantially parallel to the central surface 1123 of the second housing face 1122.

The hand-held band saw 100 further includes: and the tensioning assembly 115 is used for adjusting the position of the saw blade 180 so as to maintain reasonable tension of the saw blade 180 in the working process and ensure the normal operation of the machine. Specifically, the tensioning assembly 115 includes a knob 1151, the knob 1151 is rotatably connected to the second housing 112, and the knob 1151 is disposed between the second housing surface 1122 and the auxiliary grip 134, so as to prevent the knob 1151 from contacting the auxiliary grip 134 during rotation. More specifically, the toggle button 1151 has a top surface 1152, and when the auxiliary handle 130 is in the middle position of the handle, the minimum distance from the bottom holding surface 1346 of the auxiliary holding portion 134 to the second housing surface 1122 in the direction perpendicular to the predetermined plane P3 is greater than the maximum distance from the top surface 1152 of the toggle button 1151 to the second housing surface 1122 in the direction perpendicular to the predetermined plane P3, i.e., the design is such that the user can hold the auxiliary holding portion 134 to keep the body stable, and the user can lift the auxiliary holding portion 134 and the toggle button 1151 with sufficient clearance to complete the cutting operation.

Further, when the auxiliary handle 130 is in the middle position, the length from the holding bottom surface 1346 to the central surface 1123 along the direction perpendicular to the predetermined plane P3 is in the range of 28 mm to 70 mm, which can not contact the toggle button 1151 with the hand of the user when the auxiliary holding portion 134 is held, and thus the toggle button 1151 can not be used, and can also improve the user experience.

Referring to fig. 2, 6, 18 and 19, the auxiliary holding portion 134 further includes a third holding side 1343 disposed opposite to the first holding side 1341, a fourth holding side 1344 disposed opposite to the second holding side 1342, a holding top 1345 connecting the first holding side 1341, the second holding side 1342, the third holding side 1343 and the fourth holding side 1344, the holding top 1345 is disposed opposite to the holding bottom 1346, wherein the extension end is at least partially connected to the holding top 1345. When the auxiliary handle 130 is located at the middle position of the handle, the first holding side 1341, the second holding side 1342, the third holding side 1343, and the fourth holding side 1344 are substantially perpendicular to the preset plane P3, and the holding top 1345 is substantially arc-shaped, so that the handheld band saw 100 can better fit with the palm of a user when being used by the user, and the experience of the user is improved. It should be understood that the top holding surface 1345 and the bottom holding surface 1346 of the auxiliary holding portion 134 are both planar, or alternatively, the top holding surface 1345 and the bottom holding surface 1346 may not be planar, for example, the bottom holding surface 1346 is concave for the user to hold, and the top holding surface 1345 is convex for the user to place the palm. With the above design, the auxiliary grip portion 134 may be a hexahedron, thereby facilitating the processing. In the present embodiment, the auxiliary grip portion 134 is a hexahedron, but the auxiliary grip portion 134 may have another shape.

Four side joints of gripping are the arc angle, user's comfort level when can improving the gripping is equipped with the rubber skid resistant course on the top surface 1345 that grips of supplementary portion 134, the setting of rubber skid resistant course more is favorable to improving the operation of user in the cutting operation and feels, when the condition that user's operation gloves did not have the rubber layer appears, the condition that the slip of user's hand can effectively be avoided to the rubber skid resistant course of gripping top surface 1345 appears.

Referring to fig. 1, the starting device 220 is used for driving the motor, and the starting device 220 is disposed adjacent to the handle operating portion 126. Specifically, the starting device 220 includes a switch assembly 221, a first pressing member 222 and a second pressing member 223, wherein the switch assembly 221 is coupled to the motor for controlling whether the motor is started. The first pressing piece 222 is used to control the switch assembly 221, and the second pressing piece 223 is used to control the switch assembly 221. That is, the first pressing member 222 and the second pressing member 223 can control the switch assembly 221 and start the motor, respectively. The first pressing member 222 is movably connected to the handle 120, the first pressing member 222 at least has a first start position for starting the motor and a first stop position for stopping the motor during movement, the second pressing member 223 is movably connected to the handle 120, and the second pressing member 223 at least has a second start position for starting the motor and a second stop position for stopping the motor during movement, that is, the motor can be started by either the first pressing member 222 or the second pressing member 223, and of course, the motor can be started by operating the first pressing member 222 and the second pressing member 223 simultaneously. The first start position and the first stop position are positions where the first pressing member 222 drives the switch assembly 221 to start and stop the motor, and the second start position and the second stop position are positions where the second pressing member 223 drives the switch assembly 221 to start and stop the motor, respectively, where the first pressing member 222 and the second pressing member may be driven in a contact manner or in a non-contact manner, and when the hand-held band saw 100 is used by a user, the user may operate the first pressing member 222 and/or the second pressing member 223 with one hand, so as to facilitate the user to operate the switch assembly 221, and the second start position and the second stop position are positions where the motor is started and stopped, respectively, and the first pressing member 222 and the second pressing member 223 may be

Referring to fig. 20, the handle 120 is formed with a receiving cavity 121, and the receiving cavity 121 is formed by assembling a left half shell 122 and a right half shell 123. The switch assembly 221 is disposed in the accommodating cavity 121, the first pressing member 222 is at least partially disposed in the accommodating cavity 121, the first pressing member 222 is connected to the handle 120, the first pressing member 222 rotates around the first axis 124 relative to the handle 120, specifically, one end of the first pressing member 222 is clamped on the left half shell 122, and the other end is free to move. Meanwhile, the second pressing piece 223 is at least partially arranged in the accommodating cavity 121, the second pressing piece 223 is connected to the handle 120, the second pressing piece 223 rotates around the second axis 125 relative to the handle 120, specifically, one end of the second pressing piece 223 is clamped on the left half shell 122, and the other end of the second pressing piece 223 freely moves. The present invention does not limit whether one end of the first pressing member 222 and one end of the second pressing member 223 are specifically connected to the right half shell 123 or the left half shell 122, which will not be described in detail herein. Wherein a position connected to one end of the first pressing member 222 is referred to as a first connection point 2221, and a position connected to one end of the second pressing member 223

Referring to fig. 2, the first pressing member 222 rotates from a first stop position (shown in fig. 2) to a first start position (shown in fig. 1), and drives the second pressing member 223 from the second stop position (shown in fig. 2) to a second start position (shown in fig. 1). When the user operates the hand-held band saw 100 to cut a workpiece, specifically, when the user operates the first pressing member 222, the first pressing member 222 drives the second pressing member 223 to approach the switch assembly 221, so that the second pressing member 223 is located at the second starting position to start the machine. As an alternative, when the user operates the second pressing member 223, the second pressing member 223 approaches the switch assembly 221, so that the second pressing member 223 is in the second start position, and the first pressing member 222 is still in the first stop position. As another alternative, the second pressing member 223 rotates from the second stop position to the second start position, and drives the first pressing member 222 to move from the first stop position to the first start position. Specifically, the user operates second pressing piece 223, then second pressing piece 223 is close to switch module 221, drive first pressing piece 222 simultaneously and move to first start position by first stop position, so that, no matter the user operates first pressing piece 222 or second pressing piece 223 can both start the motor, through setting up first pressing piece 222 and second pressing piece 223, let the user can cut the position of work piece as required, select suitable handheld operating position in real time, especially when waiting to cut the work piece and be in the position of being difficult to operate relatively, two pressing pieces have given more selections to the user, user's operation is felt has been promoted greatly.

Referring to fig. 4 and 21, the longest distance between the first pressing member 222 and the first axis 124 is substantially equal to the longest distance between the second pressing member 223 and the second axis 125, and the first axis 124 is substantially parallel to the second axis 125. Specifically, the first axis 124 and the second axis 125 are substantially perpendicular to the handle median plane P1, a projection distance from the first pressing piece 222 to the first connection point 2221 on the handle median plane P1 is substantially equal to a projection distance from the second pressing piece 223 to the second connection point 2231 on the handle median plane P1, and moments of the first pressing piece 222 and the second pressing piece 223 during pressing are substantially equal. The first axis 124 and the second axis 125 are perpendicular to the handle bisecting plane P1, respectively.

The hand-held band saw 100 further includes a second elastic member having one end fixedly connected to the handle 120 and the other end connected to the first pressing member 222. The second elastic element is disposed in the accommodating cavity 121, and in particular, one end of the second elastic element is fixedly connected to the left housing, and it is not limited herein that one end of the second elastic element is disposed on the left housing or the right housing. The other end of the second elastic member is connected to the first pressing member 222, the second elastic member may be a spring, when the user presses the second pressing member 223, the first pressing member 222 moves along with the second pressing member 223 under the action of a pre-tightening force of the spring, when the user removes the pressing force on the second pressing member 223, the second pressing member 223 returns to the second stop position under the action of the switch assembly 221, and at this time, the second pressing member 223 drives the first pressing member 222 to return to the first stop position. The design structure is simple, and the processing is convenient.

Referring to fig. 22, the first pressing member 222 has a protrusion 2222, the second pressing member 223 has a groove 2232, and the protrusion 2222 and the groove 2232 cooperate with each other to allow the second pressing member 223 to push the first pressing member 222 to rotate. Specifically, the user presses the first pressing member 222, and the protrusion 2222 approaches the groove 2232 and pushes the second pressing member 223 to approach the switch assembly 221, thereby activating the motor. When the user removes the pressing force on the first pressing member 222 and the second pressing member 223 is returned to the second stop position by the switch assembly 221, the groove 2232 of the second pressing member 223 pushes the projection 2222 to return the first pressing member 222 to the first stop position.

A longest projection distance of the protrusion 2222 of the first pressing piece 222 to the first axis 124 in a direction perpendicular to the first axis 124 is substantially equal to a longest projection distance of the groove 2232 of the second pressing piece 223 to the second axis 125 in a direction perpendicular to the second axis 125. That is, the projection distance of the projection portion 2222 to the first axis 124 on the handle bisecting plane P1 is substantially equal to the projection distance of the groove 2232 to the second axis 125 on the handle bisecting plane P1. The above-described design has a benefit in that the reaction force of the switch assembly 221 against the first pressing piece 222 or the second pressing piece 223 is substantially uniform.

The first pressing member 222 has a first pressing surface 2223, the second pressing member 223 has a second pressing surface 2233, the first pressing surface 2223 is substantially arc-shaped, the second pressing surface 2233 is substantially arc-shaped, and the first pressing surface 2223 is close to the second pressing surface 2233. Specifically, the user presses the first pressing surface 2223 or the second pressing surface 2233 to drive the first pressing member 222 or the second pressing member 223. That is, the first pressing member 222 and the second pressing member 223 are overlapped, the projection 2222 of the first pressing member 222 and the groove 2232 of the second pressing member 223 are overlapped at the position where the first pressing member 222 and the second pressing member 223 overlap, wherein the projection distance of the projection 2222 to the first connection point 2221 on the handle median plane P1 is smaller than the projection distance of the first pressing member 222 to the first connection point 2221 on the handle median plane P1, and the projection distance of the groove 2232 to the second connection point 2231 on the handle median plane P1 is also smaller than the projection distance of the second pressing member 223 to the second connection point 2231 on the handle median plane P1, that is, when the user controls the switch assembly 221 using the second pressing member 223, it can be understood that when a force acts on the second pressing member 2233, the second pressing member 223 extends to act on the second pressing member 223 and rotates around the second axis 125, and the switch assembly 221 acts on the second pressing member 223, by making the distance between the second axis 125 and the second pressing surface 2233 greater than the distance between the groove 2232 and the second axis 125, that is, the moment arm of the second pressing member 223 is greater than the moment arm of the reaction force, the moment arm of the second pressing member 223 acted on by the user is extended, and thus the pressing is more labor-saving. The same principle is applied to the first pressing member 222, and will not be described in detail herein.

Alternatively, the first pressing surface 2223 is substantially continuous with the second pressing surface 2233. That is, the first pressing surface 2223 and the second pressing surface 2233 are substantially in a segment of arc shape, that is, the user can start the motor by pressing the first pressing surface 2223 or the second pressing surface 2233, or can start the motor by pressing the overlapping portion of the first pressing surface 2223 and the second pressing surface 2233.

Optionally, the switch assembly 221 includes an actuating member 2211 for actuating the motor, the actuating member 2211 has an actuating portion 2212 cooperating with the second pressing member 223; the second pressing member 223 has a triggering surface 2234, wherein when the second pressing member 223 moves from the second stop position to the second start position, the triggering surface 2234 cooperates with the triggering portion 2212 to enable the triggering element 2211 to trigger the motor, and the triggering portion 2212 is disposed adjacent to the triggering surface 2234. Specifically, when the user presses any one of the first pressing piece 222 or the second pressing piece 223, the triggering portion 2234 pushes the triggering portion 2212 to start the motor, and when the user removes the external force, the activating element 2211 is restored, that is, the triggering portion 2212 pushes the triggering portion 2234 to return the second pressing piece 223 to the second stop position.

As other optional embodiments, the starting apparatus 220 may also be disposed on an electric tool product such as an electric circular saw, a reciprocating saw, a multifunctional tool, an electric drill, an electric wood milling machine, and the like, which is not described in detail herein.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.

Claims (10)

1. A hand-held band saw comprising:

the shell assembly comprises a first shell, a second shell and a third shell, wherein the second shell is arranged at an interval with the first shell, the third shell is connected with the first shell and the second shell, and a cutting area is formed among the first shell, the second shell and the third shell;

the first rotating wheel is at least partially arranged in the first shell and can rotate relative to the first shell;

the second rotating wheel is at least partially arranged in the second shell and can rotate relative to the second shell;

the motor is arranged in the third shell and can drive one of the first rotating wheel and the second rotating wheel to rotate; the saw blade is connected with the first rotating wheel and the second rotating wheel;

a first guide mechanism connected to the housing assembly, the first guide mechanism comprising: a first guide assembly mounted to the first housing and a second guide assembly mounted to the second housing, the first guide assembly cooperating with the second guide assembly for guiding movement of the saw blade in a first cutting direction within the cutting zone;

a second guide mechanism connected to the housing assembly, the second guide mechanism comprising: a third guide assembly mounted to the first housing and a fourth guide assembly mounted to the second housing, the third guide assembly cooperating with the fourth guide assembly for guiding movement of the saw blade in a second cutting direction within the cutting zone;

a limiting mechanism mounted to the housing assembly adjacent the first guide mechanism,

the saw blade is movable from a first cutting position to a second cutting position when the saw blade within the cutting zone moves in the first cutting direction, the stop mechanism for preventing the saw blade from passing the second cutting position.

2. The hand-held band saw of claim 1, wherein:

the stop gear includes:

a first limiting member which can rotate around a first rotation axis and is connected to the first housing;

a second stopper rotatable about a second rotation axis parallel to the first rotation axis and connected to the second housing;

the saw blade is in a second cutting position, the saw blade is at least partially in contact with the first retaining member, and the saw blade is at least partially in contact with the second retaining member;

wherein at least a portion of the saw blade at the position in contact with the first retaining member intersects the direction of the first rotational axis, and at least a portion of the saw blade at the position in contact with the second retaining member intersects the direction of the second rotational axis.

3. The hand-held band saw of claim 2, wherein:

the first rotating wheel and the second rotating wheel are arranged basically symmetrically relative to a bisecting plane passing through the cutting area;

the first guide assembly and the second guide assembly are arranged substantially symmetrically along the bisecting plane;

the first limiting piece and the second limiting piece are basically symmetrically arranged along the middle dividing plane.

4. The hand-held band saw of claim 3, wherein:

the first guide assembly includes:

a first guide rotatable about a first axis of rotation;

the second guide assembly includes:

a second guide rotatable about a direction parallel to the first axis of rotation;

wherein the direction of the first axis of rotation intersects the direction of the first axis of rotation.

5. The hand-held band saw of claim 4, wherein:

the direction of the first axis of rotation is perpendicular to the direction of the first axis of rotation.

6. The hand-held band saw of claim 5, wherein:

the third guide assembly comprises:

a third guide rotatable about a second axis of rotation;

a fourth guide member adjacent to the third guide member, rotatable about a direction substantially parallel to the second axis of rotation;

the fourth guide assembly includes:

a fifth guide member disposed substantially symmetrically to the third guide member along the bisecting plane and rotatable about a direction substantially parallel to the second axis of rotation;

a sixth guide member adjacent to the fifth guide member, disposed substantially symmetrically to the fourth guide member along the bisecting plane, and rotatable about a direction substantially parallel to the second axis of rotation;

the first rotating axis and the second rotating axis form a preset angle, and the preset angle range is 20 degrees to 55 degrees.

7. The hand-held band saw of claim 6, wherein:

the hand-held band saw further includes:

an intermediate connection assembly fixedly connected to the housing assembly, the intermediate connection assembly comprising: a first connecting portion fixedly connected to the first housing and a second connecting portion fixedly connected to the second housing;

the first guide assembly is mounted to the first connection portion and the second guide assembly is mounted to the second connection portion;

the first limiting piece is mounted to the first connecting portion, and the second limiting piece is mounted to the second connecting portion.

8. The hand-held band saw of claim 6, wherein:

the hand-held band saw further includes:

a connection assembly fixedly connected to the housing assembly, the connection assembly comprising: a first connecting portion fixedly connected to the first housing and a second connecting portion fixedly connected to the second housing;

the first guide assembly is mounted to the first connection portion and the second guide assembly is mounted to the second connection portion;

the first shell comprises a first extension part, and the first limiting part is mounted to the first extension part;

the second housing includes a second extension, and the second stopper is mounted to the second extension.

9. The hand-held band saw of claim 7 or 8, wherein:

the first guide piece, the second guide piece, the third guide piece, the fourth guide piece, the fifth guide piece, the sixth guide piece, the first limiting piece and the second limiting piece are all rolling bearings.

10. A hand-held band saw comprising:

the shell assembly comprises a first shell, a second shell and a third shell, wherein the second shell is arranged at an interval with the first shell, the third shell is connected with the first shell and the second shell, and a cutting area is formed among the first shell, the second shell and the third shell;

the first rotating wheel is at least partially arranged in the first shell and can rotate around a first central axis;

the second rotating wheel is at least partially arranged in the second shell and can rotate around a second central axis;

a motor disposed in the third housing, the motor being capable of driving one of the first and second rotating wheels to rotate;

the saw blade is connected with the first rotating wheel and the second rotating wheel;

a first guide mechanism connected to the housing assembly, the first guide mechanism comprising: a first guide assembly mounted to the first housing and a second guide assembly mounted to the second housing, the first guide assembly cooperating with the second guide assembly for guiding movement of the saw blade in a first cutting direction within the cutting zone;

a stop mechanism mounted to the housing assembly adjacent the first guide assembly for preventing a saw blade within the cutting zone from passing a predetermined position when the saw blade moves in the first cutting direction.

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