CN219854418U - Power tool capable of saving labor in use - Google Patents

Abstract

The utility model discloses a power tool saving labor in use, which belongs to the technical field of power tools and comprises a long rod, a working assembly arranged at the front end of the long rod and a handle assembly arranged at the rear end of the long rod, wherein the working assembly comprises a working head driven by a motor and swinging reciprocally in a working plane, the power tool is provided with a height direction perpendicular to the working plane and perpendicular to the length direction of the long rod, and at least part of the working head is positioned in the height range of the handle assembly in the height direction. The offset distance of the working head relative to the height center line of the handle component is reasonably reduced, the moment action of the working head on the handle component caused by acting force borne by the working head during working can be reasonably reduced, so that acting force required by a user to stably hold the electric tool through the handle component when the electric tool is used can be reduced, the purpose of saving labor in use is achieved, the stability of the user in operating the electric tool can be improved, and the use experience of the user can be improved.

Description

Power tool capable of saving labor in use

Technical Field

The utility model relates to the technical field of electric tools, in particular to an electric tool capable of saving labor in use.

Background

With the development and improvement of the technology level, various electric tools are increasingly applied to production and daily use, and the working efficiency of people is greatly improved through the electric tools, so that the working intensity of people can be reduced. For the electric tool with the working head driven by the motor and rotating in a certain plane, if the length of the electric tool is larger, the acting force applied to the working head during working can cause larger moment action at the holding end, so that a user needs to spend larger force to stably hold the holding end during use, the electric tool is more laborious to use, and the use experience of the user is not facilitated to be improved.

Disclosure of Invention

In order to solve the defects and shortcomings in the prior art, the utility model provides a labor-saving electric tool, which enables at least part of a working head to be positioned in the height range of a handle assembly, achieves the purpose of labor saving in use, and improves the use experience of a user.

In order to achieve the technical purpose, the power tool comprises a long rod, a working assembly arranged at the front end of the long rod and a handle assembly arranged at the rear end of the long rod, wherein the working assembly comprises a working head driven by a motor and capable of swinging reciprocally in a working plane, the power tool is provided with a height direction perpendicular to the working plane and perpendicular to the length direction of the long rod, and at least part of the working head is positioned in the height range of the handle assembly in the height direction.

Preferably, the working head is provided with a clamping part and a working part arranged on the front side of the clamping part, the clamping part and the working part are staggered in the height direction, and the working part is positioned in the height range of the handle assembly in the height direction.

Preferably, the clamping part of the working head is located in the height range of the handle assembly in the height direction.

Preferably, the working head is provided with a clamping part and a working part arranged on the front side of the clamping part, the clamping part and the working part are aligned in the height direction, and the whole working head is positioned in the height range of the handle assembly in the height direction.

Preferably, the handle assembly comprises a handle and a battery pack, at least part of the working head being located within the height of the handle in the height direction.

Preferably, the height of the battery pack is consistent with the height of the handle; alternatively, the height of the battery pack is greater than the height of the handle.

Preferably, the battery pack is detachably connected to the handle.

Preferably, the height of the handle is 30 mm-60 mm.

Preferably, the working head is driven by a motor to reciprocate in a working plane, and the reciprocating swinging angle range of the working head is 3-10 degrees.

Preferably, the long rod is a telescopic rod or a length fixing rod.

After the technical scheme is adopted, the utility model has the following advantages:

1. according to the electric tool provided by the utility model, at least part of the working head is arranged in the height range of the handle assembly, the offset distance of the working head relative to the height center line of the handle assembly is reasonably reduced, and the moment action of acting force applied to the handle assembly when the working head works can be reasonably reduced, so that acting force required by a user to stably hold the electric tool through the handle assembly when the electric tool is used can be reduced, the purpose of saving labor in use is achieved, the stability of the electric tool operated by the user can be improved, and the use experience of the user is facilitated to be improved.

2. When the clamping portion and the working portion of the working head are staggered in the height direction, the working portion is preferably located within the height range of the handle assembly. When the clamping part and the working part are aligned in the height direction, the working part and the clamping part are both positioned in the height range of the handle assembly. Because the working part is a main stress part during working, the working part is arranged in the height range of the handle component, and the requirement of reducing the moment action of the handle component borne by the working head is more met, so that the acting force required by a user for stably holding the electric tool is reasonably reduced.

3. Because the user holds the electric tool through the handle generally when using the electric tool, the at least part of working head is located the high within range of handle, can further reduce the offset distance of working head for the user holds the center to the moment effect that the effort that can rationally reduce the working head received to holding the center and produce is favorable to further reducing the effort that the user required to hold the electric tool stably, thereby be favorable to further improving the stability of user's operation electric tool.

4. When the electric storage capacity of the battery pack is small, the height of the battery pack may be set in conformity with the height of the handle. When the electric storage capacity of the battery pack is large, the height of the battery pack may be set larger than the height of the handle. The size of the battery pack relative to the handle is reasonably set, so that the working part of the working head is preferably positioned in the height range of the handle, and the acting force required by a user to hold the electric tool is reasonably reduced. The battery pack is preferably detachably connected to the handle, so that a user can replace the battery pack according to the electric quantity condition of the battery pack and then use the battery pack continuously, or after the battery pack reaches the service life, the user only needs to purchase a new battery pack, and the use cost of the user is reduced.

5. The height of the handle is reasonably set, and the requirement that a user holds the electric tool stably through the handle is better met. If the height of the handle is less than 30mm, the handle is thinner, and the bending degree of fingers is larger when the user holds the handle, so that the comfort level of the user holding the handle is improved. If the height of the handle is larger than 60mm, the handle is thicker, which is not beneficial to the user to stably hold the handle, thereby being not beneficial to the user to stably hold the electric tool.

6. When the motor drives the working head to reciprocate in the working plane, the reciprocating swing angle range of the working head is 3-10 degrees, and the swing amplitude of the working head is reasonably set, so that the swing frequency of the working head can be improved, and the working head can better meet the reciprocating swing working requirement.

Drawings

FIG. 1 is a diagram of a complete machine of a reciprocating swing type power tool according to an embodiment;

FIG. 2 is a partial block diagram of a reciprocating swing type power tool according to an embodiment;

FIG. 3 is a partial block diagram of a working assembly of a reciprocating swing type power tool according to an embodiment;

FIG. 4 is an exploded view of a portion of the construction of a working assembly of a reciprocating oscillating power tool according to an embodiment;

FIG. 5 is an axial cross-sectional view showing a portion of the construction of a working assembly in a reciprocating oscillating power tool according to an embodiment;

FIG. 6 is a diagram showing the configuration of the motor and the rotor of the reciprocating swing type electric tool according to the first embodiment;

FIG. 7 is a diagram showing the configuration of the motor, rotary member and fork of a reciprocating swing type electric tool according to an embodiment;

FIG. 8 is a schematic side view of a reciprocating swing type power tool according to an embodiment;

FIG. 9 is a schematic view showing a partial structure of a reciprocating swing type electric tool according to the second embodiment;

FIG. 10 is a schematic diagram showing the cooperation of the working assembly and the housing of the machine body in the second embodiment of the reciprocating swing type electric tool;

fig. 11 is a schematic diagram showing the cooperation of the working assembly and the handle assembly in the three-reciprocating swing type electric tool according to the embodiment.

In the figure, 100-working assembly, 110-motor, 121-inner shaft, 122-outer shaft, 123-upper chuck, 124-lower chuck, 125-bearing, 126-spring, 127-limit pin, 128-shaft cover, 129-unlocking piece, 130-machine head shell, 141-rotating shaft, 142-rotating piece, 143-shifting fork, 143 a-sleeving part, 143 b-fork arm, 150-shovel blade, 151-clamping part, 152-bending part, 153-working part, 200-long rod, 210-rod body, 220-adjusting sleeve, 230-fixing seat, 300-handle assembly, 310-handle, 320-battery pack and 400-machine body shell.

Detailed Description

The utility model will be further described with reference to the drawings and the specific examples. It is to be understood that the terms "upper," "lower," "left," "right," "longitudinal," "transverse," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like, as used herein, are merely based on the orientation or positional relationship shown in the drawings and are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the devices/elements referred to must have or be configured and operated in a particular orientation and therefore should not be construed as limiting the utility model.

Example 1

Referring to fig. 1 to 8, a power tool with reduced effort in use according to an embodiment of the present utility model includes a long bar 200, a working assembly 100 disposed at a front end of the long bar 200, and a handle assembly 300 disposed at a rear end of the long bar 200, the working assembly 100 including a working head driven by a motor 110 and reciprocally swinging in a working plane, the power tool having a height direction perpendicular to the working plane and perpendicular to a length direction of the long bar 200, at least a portion of the working head being located within a height range of the handle assembly 300 in the height direction.

The offset distance of the working head relative to the height center line of the handle assembly 300 is reasonably reduced, and the moment action of the working head on the handle assembly 300 caused by acting force applied during working can be reasonably reduced, so that acting force required by a user to stably hold the electric tool through the handle assembly 300 when the electric tool is used can be reduced, the purpose of saving labor in use is achieved, the stability of the user in operating the electric tool can be improved, and the use experience of the user is improved.

Referring to fig. 1 and 8, the front-rear direction is defined as the longitudinal direction, the left-right direction is defined as the width direction, and the up-down direction is defined as the height direction.

In this embodiment, the working assembly 100 includes a clamping structure for clamping or unclamping the working head, a transmission structure for transmitting power, and the motor 110 drives the working head to reciprocate in the working plane through the transmission structure and the clamping structure. Referring to fig. 2, in this embodiment, the reciprocating swing angle range λ of the working head is 3 ° to 10 °. Specifically, the reciprocating swing angle range λ of the working head in this embodiment refers to the maximum swing angle of the front-rear direction center line of the working head in the left-right direction, and the swing angle range λ is about 8 °. It will be appreciated that the swing angle range λ may be set to other reasonable magnitudes of 3 °,4 °, 5 °, 6 °, 7 °, 9 °,10 °, etc.

Referring to fig. 2 and 3, in this embodiment, the working assembly 100 further includes a handpiece housing 130, the motor 110, the clamping structure and the transmission structure are disposed inside the handpiece housing 130, and the working head is disposed outside the handpiece housing 130.

Referring to fig. 4 and 5, the clamping structure includes an inner shaft 121 and an outer shaft 122 that are sleeved together, the inner shaft 121 is disposed to move back and forth axially relative to the outer shaft 122, an upper chuck 123 is disposed at the bottom end of the outer shaft 122, a lower chuck 124 disposed at the bottom of the upper chuck 123 is disposed at the bottom end of the inner shaft 121, and the upper chuck 123 and the lower chuck 124 cooperate to clamp or unclamp the working head. In this embodiment, the outer shaft 122 is rotatably disposed in the handpiece housing 130 through two bearings 125 disposed in parallel up and down, the upper chuck 123 and the lower chuck 124 are disposed outside the handpiece housing 130, and the upper chuck 123 is provided with a plurality of limiting pins 127 circumferentially spaced apart.

In order to enable the lower jaw 124 to cooperate with the upper jaw 123 to clamp the working head, the clamping arrangement further comprises resilient members acting on the inner shaft 121 to bring the inner shaft 121 into a clamping position in which the lower jaw 124 cooperates with the upper jaw 123 to clamp the working head. In this embodiment, the elastic member is a spring 126 sleeved outside the inner shaft 121, and the spring 126 is in a compressed state, one end of the spring is positioned and arranged, and the other end of the spring abuts against the inner shaft 121. Specifically, the top end of the inner shaft 121 is sleeved with the shaft cover 128, the top end of the spring 126 abuts against the shaft cover 128 to abut against the inner shaft 121, and the bottom end of the spring 126 abuts against the step surface to achieve positioning. The spring 126 applies an upward force to the inner shaft 121, causing the inner shaft 121 to normally assume a clamping position in which the lower collet 124 cooperates with the upper collet 123 to clamp the working head. It will be appreciated that other resilient members that can place the inner shaft 121 in the clamped position and return the inner shaft 121 to the clamped position can be used.

To facilitate user replacement of the working head, the working assembly 100 further includes an unlocking member 129, the unlocking member 129 acting on the inner shaft 121, the unlocking member 129 being operable to urge the inner shaft 121 downwardly to an unlocked position in which the lower collet 124 is disengaged from the upper collet 123. In this embodiment, the unlocking member 129 is rotatably disposed at the top of the handpiece housing 130, and when the unlocking member 129 rotates upward, the bottom side of the unlocking member 129 abuts against the inner shaft 121 to move the inner shaft 121 downward against the elastic force of the spring 126, the downward moving inner shaft 121 drives the lower collet 124 to move downward synchronously and compress the spring 126 under further force, and the lower collet 124 is far away from the upper collet 123, so that the upper collet 123 and the lower collet 124 release the working head, and the working head can be removed and replaced. After replacement, the unlocking member 129 is rotated downwards, so that the unlocking member 129 releases the inner shaft 121, and the spring 126 which restores the deformation can drive the inner shaft 121 and the lower chuck 124 to move upwards for resetting, so that the lower chuck 124 and the upper chuck 123 clamp the working head again.

Referring to fig. 6 and 7, the transmission structure includes a rotating shaft 141 driven by the motor 110, a rotating member 142 eccentrically sleeved on the rotating shaft 141, and a shifting fork 143 sleeved on the outer shaft 122 and matched with the rotating member 142, wherein the rotating shaft 141 is perpendicular to the outer shaft 122, and the eccentrically rotating member 142 drives the clamping structure to swing reciprocally through the shifting fork 143. In this embodiment, the rotating shaft 141 is rotatably disposed at the front end of the motor 110 through a bearing, the rear end of the rotating shaft 141 is directly connected with the motor shaft of the motor 110 in a transmission manner, the front end of the rotating shaft 141 is eccentrically disposed with respect to the rear end, the rotating member 142 is sleeved at the front end of the rotating shaft 141, and the rotating member 142 is eccentrically disposed with respect to the motor shaft, i.e. the central axis of the rotating member 142 is not coincident with the central axis of the motor shaft. Referring to fig. 7, the fork 143 includes an integrally formed coupling portion 143a and a fork arm 143b, the coupling portion 143a is sleeved outside the outer shaft 122, the coupling portion 143a and the outer shaft 122 are circumferentially limited, the fork arm 143b is symmetrically arranged in a left-right direction, and the rotating member 142 is arranged between the two fork arms 143b and contacts the fork arm 143 b. It is understood that the rotating member 142 may be a bearing, a roller fixedly sleeved on the front end of the rotating shaft 141, or the like.

The motor 110 drives the rotating member 142 to eccentrically rotate through the rotating shaft 141, and the eccentrically rotating member 142 drives the clamping structure to reciprocally swing left and right through the shifting fork 143, and the clamping structure drives the working head to reciprocally swing in a left plane and a right plane. Because the rotating shaft 141 is directly connected with the motor shaft of the motor 110 in a transmission way, the rotating speed of the rotating shaft 141 is higher, and correspondingly, the swinging frequency of the working head is also higher, which is beneficial to improving the working efficiency.

Referring to fig. 8, the handle assembly 300 includes a handle 310 and a battery pack 320, the handle 310 being fixed to the rear end of the rod body 210, and the battery pack 320 being detachably connected to the rear end of the handle 310. In this embodiment, the voltage of the battery pack 320 is 12V, and the shape of the battery pack 320 is preferably consistent with the shape of the handle 310, i.e., the height of the battery pack 320 is consistent with the height of the handle 310. It will be appreciated that the battery pack 320 may be attached to the top or bottom of the handle 310 at other suitable locations, and that the battery pack 320 may be configured to be larger than the handle 310 when the voltage of the battery pack 320 is high, i.e., the height of the battery pack 320 may be greater than the height of the handle 310.

Preferably, at least part of the working head is located within the height of the handle 310 in the height direction. It will be appreciated that when the height of the battery pack 320 is consistent with the height of the handle 310, at least part of the working head is located within the height of the handle assembly 300; when the height of the battery pack 320 is greater than the height of the handle 310, at least part of the working head is located within the height range of the handle 310.

Referring to fig. 3, the working head in this embodiment includes a blade 150, where the blade 150 includes a clamping portion 151, a bending portion 152, and a working portion 153 that are sequentially distributed from the back to the front and integrally formed, and the working portion 153 and the clamping portion 151 are staggered in the up-down direction. The clamping portion 151 is provided with a clamping groove with a substantially U-shaped shape and a limiting hole positioned at the periphery of the clamping groove, when the shovel 150 is clamped on the machine body, the clamping portion 151 moves forwards and backwards to enable the inner shaft 121 to be clamped into the clamping groove and enable the limiting hole to correspond to the limiting pin 127, the reset inner shaft 121 drives the lower clamping head 124 to move upwards, the lower clamping head 124 and the upper clamping head 123 are matched to clamp the clamping portion 151, and the limiting pin 127 is inserted into the corresponding limiting hole.

In connection with fig. 8, when the blade 150 is operated, the working portion 153 of the blade 150 is a main force receiving portion, and preferably, the working portion 153 of the blade 150 is located within a height range of the handle 310. In this embodiment, the blade 150 is located entirely within the height of the handle 310. It should be understood that only the working portion 153 of the blade 150 may be located within the height range of the handle 310, and the clamping portion 151 and the bending portion 152 of the blade 150 may be located outside the height range of the handle 310. It will be appreciated that the blade 150 may be configured in a flat plate shape with the working portion 153 and the tool clamping portion 151 aligned in front-to-back, and the blade 150 is located entirely within the height of the handle 310. When the working head adopts other tool bits, if the working head is arranged in front-back alignment, the whole working head is positioned in the height range of the handle 310; if the working position at the front end of the working head and the clamping position at the rear end are staggered in the height direction, the working position at the front end of the working head is located in the height range of the handle 310.

In order to facilitate the user to hold the electric tool stably through the handle 310, the height H of the handle 310 is required to be set reasonably, and H is more than or equal to 30mm and less than or equal to 60mm. In this embodiment, the height H of the handle 310 is about 48mm. It is understood that the height H of the handle 310 may be set to other reasonable sizes such as 30mm, 35mm, 40mm, 42mm, 44mm, 46mm, 47mm, 49mm, 50mm, 52mm, 54mm, 56mm, 58mm, 60mm, etc., and the cross-sectional shape of the handle 310 in the left-right direction may be set to a reasonable shape such as a circular shape, an oblate shape, a rounded rectangle, a rounded square, etc.

In order to facilitate the user to adjust the specific length of the long rod 200, in this embodiment, the long rod 200 is preferably a telescopic rod, and the two adjacent rod bodies 210 of the long rod 200 are movably connected through the adjusting sleeve 220, and the specific structure of the adjusting sleeve 220 can refer to the prior art, which is not described herein. It will be appreciated that the rod body 210 of the long rod 200 may be telescopically connected by an existing spring plate structure, and of course, the long rod 200 may also be a single rod structure with a fixed length.

Example two

Referring to fig. 9, in this embodiment, a fixing base 230 is disposed at the front end of the long rod 200, and the handpiece housing 130 is detachably matched with the fixing base 230. Referring to fig. 10, the reciprocating swing type electric tool of the present embodiment further includes a body housing 400, the body housing 400 is formed with a handle portion, and the head housing 130 is detachably coupled with the body housing 400. When the working assembly 100 is assembled to the fixing base 230, the reciprocating swing type electric tool is used as a long handle tool, and the working range is wide. When the working assembly 100 is separated from the fixing base 230 and is additionally connected with the body housing 400, the reciprocating swing type electric tool formed by the working assembly 100 and the body housing 400 can be used as a short handle tool. It can be appreciated that the detachable fixed fit between the handpiece housing 130 and the fixed seat 230, and between the handpiece housing 130 and the body housing 400 can be realized by reasonable structures such as a buckle structure, a screw fit structure, a locking sleeve structure, etc.

Other structures of the second embodiment are the same as those of the first embodiment, and will not be described in detail here.

Example III

Referring to fig. 11, in the second embodiment, the handle assembly 300 is detachably disposed at the rear end of the long rod 200 on the basis of the detachable cooperation between the handpiece housing 130 and the fixing base 230, that is, the handpiece housing 130 separated from the fixing base 230 can be directly fixed with the handle assembly 300 separated from the long rod 200 to be used as a short-handle tool. It will be appreciated that the handpiece housing 130 and the handle assembly 300 may be detachably and fixedly coupled by a reasonable structure such as a snap-fit structure, a screw-fit structure, a locking sleeve structure, etc.

Other structures of the third embodiment are the same as those of the first embodiment, and will not be described in detail here.

In addition to the above preferred embodiments, the present utility model has other embodiments, and various changes and modifications may be made by those skilled in the art without departing from the spirit of the utility model, which shall fall within the scope of the utility model as defined in the appended claims.

Claims (10)

1. The utility model provides a use laborsaving electric tool, includes the stock, locates the work subassembly of stock front end and locates the handle subassembly of stock rear end, and the work subassembly includes by motor drive and the work head of reciprocating swing in the working plane, its characterized in that, electric tool has with the working plane perpendicular and with the length direction vertically direction of stock high direction, the part is located the altitude range of handle subassembly in the high direction at least of work head.

2. The power tool according to claim 1, wherein the working head has a clamping portion and a working portion provided on a front side of the clamping portion, the clamping portion and the working portion being disposed in a staggered manner in a height direction, the working portion being located in a height range of the handle assembly in the height direction.

3. A power tool according to claim 2, wherein the gripping portion of the working head is located within the height of the handle assembly in the height direction.

4. The power tool according to claim 1, wherein the working head has a clamping portion and a working portion provided on a front side of the clamping portion, the clamping portion and the working portion are aligned in a height direction, and the working head is located entirely within a height range of the handle assembly in the height direction.

5. A power tool according to claim 1, wherein the handle assembly comprises a handle and a battery pack, and wherein at least part of the working head is located within the height of the handle in the height direction.

6. The power tool of claim 5, wherein the battery pack has a height corresponding to a height of the handle; alternatively, the height of the battery pack is greater than the height of the handle.

7. The power tool of claim 5, wherein the battery pack is removably coupled to the handle.

8. The power tool of claim 5, wherein the handle has a height of 30mm to 60mm.

9. A power tool according to claim 1, wherein the working head has a reciprocating swing angle in the range of 3 ° to 10 °.

10. The power tool of claim 1, wherein the long rod is a telescopic rod or a length-fixed rod.