CN220994374U - Handle assembly and electric tool with same - Google Patents

Abstract

The utility model discloses a handle assembly and an electric tool with the same, wherein the handle assembly comprises: the shell is hollow in the interior and extends along the longitudinal direction, the shell comprises a first shell part and a second shell part which are arranged in a split mode, and a matching area of the first shell part and the second shell part extends along the longitudinal direction; and the fastening ring is sleeved at the end parts of the first shell part and the second shell part and is configured to prevent the end parts of the first shell part and the second shell part from being outwards opened when the external force acts on the end parts.

Description

Handle assembly and electric tool with same

Technical Field

The utility model belongs to the technical field of electric tools, and particularly relates to a handle assembly and an electric tool with the same.

Background

The electric tool can better and faster help people to complete the established work, and is deeply favored by people. The electric tool generally includes a housing, and a motor assembly disposed in the housing, wherein the motor assembly is configured to output a rotational driving force to rotate the working head. In the prior art, the shells are arranged in a split mode, and the shells arranged in the split mode are fastened through screws. Screw fastening requires a screw column having a certain extension length to be provided at a corresponding position of each case separately provided, whereas the screw column cannot be provided at a case having a smaller size. Accordingly, there is a need for an improvement over the prior art to overcome the deficiencies described in the prior art.

Disclosure of utility model

Therefore, the technical problem to be solved by the utility model is to provide a handle assembly and an electric tool with the same.

In order to solve the above technical problems, the present utility model provides a handle assembly, comprising: the shell is hollow in the interior and extends along the longitudinal direction, the shell comprises a first shell part and a second shell part which are arranged in a split mode, and a matching area of the first shell part and the second shell part extends along the longitudinal direction; and the fastening ring is sleeved at the end parts of the first shell part and the second shell part and is configured to prevent the end parts of the first shell part and the second shell part from being outwards opened when the external force acts on the end parts.

Preferably, the end parts of the first shell part and the second shell part, which are matched with the fastening ring, are formed with step structures, and the end parts of the fastening ring are abutted against the step structures

Preferably, a plurality of concave structures are arranged on a first end surface of the fastening ring, which is abutted against the step structure, wherein the sum of the areas of the openings formed on the first end surface by the concave structures is smaller than the area of the first end surface except for the openings.

Preferably, the outer side wall of the fastening ring is a rotation surface, wherein a generatrix of the rotation surface is a straight line or a smooth curve.

Preferably, the outer side wall of the fastening ring is provided with axially extending groove bodies which are circumferentially distributed at intervals.

Preferably, the fastening ring is in threaded connection with the shell, wherein an inner ring of the fastening ring is provided with an inner thread, and an outer thread matched with the inner thread is arranged on the outer side wall of the end part of the shell.

Preferably, a driving unit is accommodated in the hollow cavity of the shell, and the driving unit is provided with an output shaft extending along the longitudinal direction, and the output shaft is connected with a load positioned outside the shell so as to drive the load to rotate; wherein the fastening ring is located at an end of the housing near the output shaft.

Preferably, the thickness of the fastening ring is 20% -40% of the diameter of the inner ring, wherein the value range of the thickness of the fastening ring is 3-6mm.

Preferably, the shell is arranged in half, the first shell part and the second shell part are detachably connected, the first shell part is provided with a first profile opening matched with the second shell part, the second shell part is provided with a second profile opening matched with the first profile opening, one of the first profile opening and the second profile opening is provided with a positioning convex rib, and the other one of the first profile opening and the second profile opening is provided with a positioning groove matched with the positioning convex rib; the positioning ribs and the positioning grooves are intermittently distributed along the outline of the first profile opening or the outline of the second profile opening.

The utility model also discloses a power tool which comprises the handle assembly.

The technical scheme provided by the utility model has the following advantages:

In the embodiment, the fastening ring is sleeved at the front end of the shell to solve the problem of connection of the end part of the shell, so that the end part of the shell can be effectively prevented from being outwards opened due to the action of external force, and the connecting device has the advantages of being stable and reliable in connection;

In a specific embodiment, the fastening ring is in threaded connection with the shell, so that the handle assembly can be conveniently disassembled and assembled, for example, when an accessory (dust cover) needs to be replaced, the fastening ring can be screwed or unscrewed without tools, the disassembly and assembly are more convenient, and the use experience of a user is effectively improved;

in the specific embodiment, the thickness of the fastening ring is 20% -40% of the diameter of the inner ring, so that the fastening ring has good structural strength, is not easy to deform even in the process of high-speed operation of the output shaft, has good locking effect, and is not easy to loosen from the shell.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a handle assembly according to the present utility model;

FIG. 2 is a partially exploded view of the structure of FIG. 1;

FIG. 3 is an exploded view of the handle assembly provided by the present utility model;

FIG. 4 is an enlarged schematic view of the area A in FIG. 3;

FIG. 5 is a schematic structural view of the second shell portion;

FIG. 6 is a schematic structural view of a fastening ring;

FIG. 7 is a schematic view of the positional relationship between the locking unit and the actuator;

fig. 8 is an enlarged schematic view of the area B in fig. 7.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. The utility model will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.

Example 1

The present utility model provides a handle assembly that, in an application scenario, is a handle for a power tool, such as a power screwdriver, electric grinder, or the like. Of course, the handle assembly may also be a handle for a medical instrument, a machining assist device. The handle assembly will be mainly described as a handle of a power tool, but the scope of the embodiments of the present utility model is not limited thereto based on the above description.

Referring to fig. 1 to 3, the handle assembly includes a housing 100, and the housing 100 is hollow and extends in a longitudinal direction. The hollow chamber of the housing 100 accommodates therein a driving unit 300, the driving unit 300 having an output shaft 310 extending in a longitudinal direction, the output shaft 310 being connected to a load located outside the housing 100 to drive the load to rotate. The "load" is various types of working heads (not shown) drivingly connected to the output shaft 310. The axial, radial directions appearing hereinafter are those of the output shaft 310. In this embodiment, the longitudinal direction is substantially the direction along which the axial direction extends.

To facilitate the installation of the driving unit 300, the housing 100 is provided separately, i.e., the housing 100 includes a detachably coupled shell portion. The mating areas on the different shell portions of the housing 100 extend in the longitudinal direction. The different shell portions of the housing 100 may be detachably connected by fasteners, such as by screws. Referring to fig. 3 to 5, in the case of screw connection, screw columns 400 are required to be disposed on different shell portions of the housing 100 and engaged with screws, and the extending direction of the screw columns 400 is perpendicular to the longitudinal direction. In order to better secure the different shell portions, the number of screw columns 400 is plural, and the plurality of screw columns 400 are not completely symmetrically distributed due to space limitation.

Screw connection is a more conventional connection method, but screw connection does not solve all problems, for example, the size of the end of the housing 100 near the output shaft 310 is small, the outer diameter of the end of the housing 100 near the output shaft 310 is approximately 1.5 to 2.5 times the diameter of the output shaft 310, and the screw column 400 cannot be provided due to limited space. Therefore, how to fix the different casing parts near the end position of the casing 100 near the output shaft 310 is a technical problem yet to be solved.

For convenience of explanation, the end of the housing 100 near the output shaft 310 will now be defined as the front end of the housing 100, and the opposite end will be defined as the rear end of the housing 100.

The front end of the housing 100 is sleeved with a fastening ring 200, and in this embodiment, the fastening ring 200 is sleeved at the front end of the housing 100 to solve the problem of connection of the end of the housing 100, thereby preventing the end of the housing 100 from being outwards opened when the end is subjected to external force. The "external force" mentioned above means: during operation, the output shaft 10 will vibrate during high-speed rotation, and the casing 100 is stressed to some extent in the radial direction, so that the front ends of the different casing parts of the casing 100 tend to open. Fixing the front end of the housing 100 by the fastening ring 200 has the advantage of stable and reliable connection.

In one embodiment, the housing includes a first housing portion 110 and a second housing portion 120, and the fastening ring 200 is sleeved on front ends of the first housing portion 110 and the second housing portion 120. The front ends of the first and second shell portions 110 and 120 are effectively prevented from being outwardly opened when an external force is applied thereto by the fastening ring 200. Preferably, the housing 100 is provided in half, and the first and second housing parts 110 and 120 are substantially the same size. The driving unit 300 can be more conveniently installed.

Wherein the first shell portion 110 has a first profile opening that mates with the second shell portion 120, and the second shell portion 120 has a second profile opening that mates with the first profile opening. The first profile opening is a mating area of the first shell portion 110, the second profile opening is a mating area of the second shell portion 120, and both the first profile opening and the second profile opening extend in a longitudinal direction.

In order to avoid the problem of misalignment between the first shell portion 110 and the second shell portion 120, and to ensure the coupling accuracy between the first shell portion 110 and the second shell portion 120, an alignment structure is disposed between the first shell portion 110 and the second shell portion 120.

The alignment structure includes a positioning rib 111 and a positioning groove 121. The positioning ribs 111 and the positioning grooves 121 are elongated and are intermittently distributed along the contour of the first contour opening or the second contour opening. One of the first profile opening and the second profile opening is provided with a positioning rib 111, and the other is provided with a positioning groove 121 matched with the positioning rib 111. The positioning ribs 111 may be caught in the positioning grooves 121 to achieve positioning between the first and second shell portions 110 and 120.

In a specific embodiment, the first profile opening is provided with a positioning rib and a positioning groove at the same time, and the second profile opening is provided with a positioning rib and a positioning groove at the same time. The positioning convex ribs and the positioning grooves on the first profile opening are matched and connected with the corresponding positioning grooves and positioning convex ribs on the second profile opening. When the device is installed, the first shell portion 110 and the second shell portion 120 can be accurately assembled together only by aligning the positioning ribs with the positioning grooves, and the device has the advantage of convenience in installation. When the first profile opening is simultaneously provided with the positioning convex ribs and the positioning grooves, the positioning convex ribs and the positioning grooves can be arranged side by side, and can also be sequentially arranged in the extending direction of the profile opening. It should be noted that, even if the first profile opening is provided with the positioning ribs and the positioning grooves at the same time, the positioning ribs arranged on the first profile opening cannot be matched with the positioning grooves arranged on the first profile opening, and only can be matched with the positioning grooves correspondingly arranged on the second profile opening. Therefore, the matched alignment structure is a positioning convex rib arranged on one of the first profile opening and the second profile opening and a positioning groove matched with the positioning convex rib arranged on the other one of the first profile opening and the second profile opening.

In the present embodiment, the housing 100 includes only two housing parts, and the number of housing parts is small, so that the assembly efficiency can be effectively improved, and the installation process can be simplified. In the installation process, the driving unit 300 may be firstly installed to one of the first shell portion 110 and the second shell portion 120, then the first shell portion 110 and the second shell portion 120 are initially positioned by the alignment structure, after the positioning is finished, the first shell portion 110 and the second shell portion 120 are respectively surrounded from two sides of the driving unit 300, then the first shell portion 110 and the second shell portion 120 are fastened together by using screws, and finally the fastening ring 200 is sleeved at the front ends of the first shell portion 110 and the second shell portion 120, so as to prevent the front ends of the first shell portion 110 and the second shell portion 120 from cracking in the working process.

The fastening ring 200 is screw-coupled with the housing 100. Wherein, the inner ring of the fastening ring 200 is provided with an internal thread, and the outer sidewalls of the front ends of the first and second shell portions 110 and 120 are provided with external threads engaged with the internal thread. After the fastening ring 200 adopts threaded connection, the fastening ring 200 can be conveniently disassembled and assembled, for example, when accessories (dust covers) need to be replaced, the fastening ring 200 can be screwed or unscrewed without tools, the disassembly and assembly are more convenient, and the use experience of a user is effectively improved.

In order to enhance the fastening effect of the fastening ring 200, in a specific embodiment, the thickness of the fastening ring 200 is 20% -40% of the diameter of the inner ring thereof, and the thickness refers to the dimension in the radial direction. Preferably, the thickness of the fastening ring 200 has a value ranging from 3 to 6mm. The thickness of the fastening ring 200 may be 3mm, 4mm, 5mm, 6mm, or the like, or may be increased between 3 and 6mm in units of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9 mm. Thus, the fastening ring 200 has superior structural strength, and is not easily deformed even during the high-speed operation of the output shaft 310. Thus, the fastening ring 200 has a good locking effect, and the fastening ring 200 is not easily released from the housing 100.

In order to provide the fastening ring 200 with a sufficient locking force, and also to facilitate screwing of the fastening ring 200, the length of the fastening ring 200 in the axial direction is approximately equal to the axial length of the locking cap 320. A locking cap 320 is threadedly coupled to the free end of the output shaft 310 and is at least partially located outside of the housing 100 for securing the working head. In this specification, "substantially" is understood to mean close to, approximate to, or within a predetermined range from the target value.

Further, front ends of the first and second shell portions 110 and 120 coupled with the fastening ring 200 are formed with a stepped structure, and end portions of the fastening ring 200 are abutted against the stepped structure. The stepped structure serves to limit the fastening ring 200 in the axial direction, thereby improving the installation accuracy of the fastening ring 200. The step structure forms a small diameter end at the front end of the housing 100, and the external thread is disposed on the outer sidewall of the small diameter end.

Specifically, as shown in fig. 6, the end surface of the fastening ring 200 abutting against the step structure is a first end surface 210, and the step structure has a second end surface 130 abutting against the first end surface 210. In order to increase the friction between the first end surface 210 and the second end surface 130, a plurality of concave structures 211 are provided on the first end surface 210 of the fastening ring 200.

The recess structure 211 is a recess groove recessed on the first end surface 210. The sum of the areas of the openings formed by the plurality of concave structures 211 on the first end surface 210 is smaller than the area of the first end surface 210 except the openings. When the first end face 210 and the second end face 130 are observed to be enlarged, it is found that the first end face 210 and the second end face 130 are not straight planes but have minute undulating surface bodies. The present embodiment can increase the fit between the first end surface 210 and the second end surface 130 through the concave structure 211, thereby increasing the friction between the first end surface 210 and the second end surface 130. The specific shape of the concave groove may be set as desired, and is not limited to the specific shape shown in fig. 6.

As can be seen from the above description, the fastening ring 200 and the housing 100 not only have the locking force generated by the threaded connection, but also have the friction force between the fastening ring 200 and the step structure, and the fastening ring 200 has better anti-loosening and anti-disengaging effects under the superposition of the above forces.

In order to make the user have a better feel when screwing the fastening ring 200, the outer side wall of the fastening ring 200 is set as a rotation surface, and the generatrix of the rotation surface is a straight line or a smooth curve. When the generatrix of the rotation surface is a straight line, the outer side wall of the fastening ring 200 is a cylindrical surface; when the generatrix of the rotation surface is a smooth curve, the outer sidewall of the fastening ring 200 is a surface body conforming to the ergonomic design. Therefore, the outer side wall of the fastening ring 200 has no corner structure, and when the fastening ring 200 is screwed or unscrewed, no obvious touch feeling exists, so that the use experience of a user is effectively improved.

Further, the outer sidewall of the fastening ring 200 is further provided with axially extending circumferentially spaced apart grooves 220. The number of the groove bodies 220 is provided with a plurality, and the function of arranging the groove bodies 220 is that: the user's hand is prevented from slipping while tightening or loosening the fastening ring 200.

The handle assembly further includes a locking unit 500 distributed near the fastening ring 200 in consideration of the need to secure the output shaft 310 in a non-rotating state to secure the personal health of the user when the work head is replaced. Referring to fig. 7 in combination with fig. 8, the locking unit 500 includes a supporting block 540 fixed in the hollow cavity of the housing 100, a connecting post 520 extending along the radial direction of the output shaft 310, a button member 510 fixed to the connecting post 520 and exposed on the outer side wall of the housing 100, and a biasing member 530 elastically supported between the button member 510 and the supporting block 540.

The button member 510 is fixedly arranged at the top of the connecting column 520 to form a whole with the connecting column 520. The "top" is the end of the connecting post 520 that is remote from the output shaft 310. The button member 510 and the output shaft 310 are respectively located at the upper and lower sides of the support block 540. The supporting block 540 is provided with a through hole for the connecting column 520 to vertically penetrate, and the output shaft 310 is provided with a clamping groove matched with the bottom of the connecting column 520.

In order to avoid directly forming a clamping groove on the output shaft 310, the structural strength of the output shaft 310 is affected. In this embodiment, the output shaft 310 is fixedly sleeved with a stop ring 550 corresponding to the connection post 520, and the outer circumferential surface of the stop ring 550 is provided with the above-mentioned clamping groove. Thereby, the structural strength of the output shaft 310 is ensured while the processing process is simplified.

The biasing member 530 is sleeved on the connecting post 520, and the biasing member 530 is preferably a compression spring. The top end of the compression spring is abutted with the bottom of the button member 510, and the bottom end of the compression spring is abutted with the top of the supporting block 540. When the output shaft 310 drives the working head to work, the button member 510 and the connecting post 520 are maintained in a reset state under the action of the compression spring. At this time, the bottom of the connection post 520 is far away from the clamping groove of the output shaft 310, and a preset gap exists between the bottom of the connection post 520 and the output shaft 310 in the radial direction.

When the user presses the button member 510 when the work head needs to be replaced, the compression spring is compressed, the bottom of the connection post 520 is inserted into the clamping groove of the output shaft 310, and the output shaft 310 is locked to stop rotating. When the button member 510 is released by the user's hand, the button member 510 and the connection post 520 are restored by the compression spring, and at this time, the output shaft 310 may be driven to rotate.

Under the condition that an output shaft is locked, the front ends of different shell parts of the shell body can be opened to two sides due to the fact that the connecting column is influenced by torque of the output shaft. In the present utility model, the front ends of the first and second shell portions 110 and 120 cannot be opened due to the fastening ring 200, and the locking effect is good.

With continued reference to fig. 7, the housing 100 is further provided with an actuator 600 and a governor knob 700. The actuator 600 is located at the rear side of the locking unit 500, and the jog dial 700 is located at the rear side of the actuator 600, thereby preventing the user's hand from operating the jog dial 700 by mistake when operating the actuator 600 and the locking unit 500.

The driving unit 300 further includes a trigger switch 330 coupled to the actuator 600, and a PCB control board 340 coupled to the jog dial 700. Wherein, a potentiometer (not shown) is arranged on the PCB control board 340, the speed adjusting knob 700 is connected with the potentiometer, and when the speed adjusting knob 700 is rotated, the potentiometer can adjust its own resistance value, thereby realizing the adjustment of the rotation speed of the output shaft 310.

The activating member 600 is a sliding piece extending along a longitudinal direction, and the front end and the rear end of the activating member 600 are respectively provided with an operation end provided with a holding block 610 and an abutting end 620 for pressing the trigger switch 330. The operation end and the abutting end 620 are accommodated in the accommodating cavity of the housing 100. The holding block 610 is fixedly arranged at the top of the operation end and is exposed on the outer side wall of the casing 100 for being pushed by a user. The outer side wall of the housing 100 is provided with a sliding groove which is matched with the holding block 610 and extends along the longitudinal direction. The grip block 610 is capable of sliding within the chute under the action of a user's hand.

The holding block 610 has a start position at the front end of the chute and a stop position at the rear end of the chute. When the grip block 610 is located at the starting position, the abutting end 620 triggers the trigger switch 330, and the output shaft 310 rotates; when the grip block 610 is at the stop position, the abutting end 620 is separated from the trigger switch 330, and the output shaft 310 stops rotating.

Example two

The utility model also provides an electric tool which can be a screw driver, an electric grinder and the like. Wherein the power tool includes the handle assembly of embodiment one.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. Based on the embodiments of the present utility model, those skilled in the art may make other different changes or modifications without making any creative effort, which shall fall within the protection scope of the present utility model.

Claims (10)

1. A handle assembly, comprising:

The shell is hollow in the interior and extends along the longitudinal direction, the shell comprises a first shell part and a second shell part which are arranged in a split mode, and a matching area of the first shell part and the second shell part extends along the longitudinal direction;

And the fastening ring is sleeved at the end parts of the first shell part and the second shell part and is configured to prevent the end parts of the first shell part and the second shell part from being outwards opened when the external force acts on the end parts.

2. The handle assembly of claim 1, wherein the handle assembly comprises a handle,

The end parts of the first shell part, the second shell part and the fastening ring are connected in a matched mode, a step structure is formed in the end part of the fastening ring, and the end part of the fastening ring abuts against the step structure.

3. The handle assembly of claim 2, wherein the handle assembly,

The first end face, which is abutted against by the fastening ring and the step structure, is provided with a plurality of concave structures, wherein the sum of the areas of the openings formed on the first end face by the concave structures is smaller than the area of the first end face except for the openings.

4. The handle assembly of claim 1, wherein the handle assembly comprises a handle,

The outer side wall of the fastening ring is a rotation surface, wherein a bus of the rotation surface is a straight line or a smooth curve.

5. The handle assembly of claim 1, wherein the handle assembly comprises a handle,

The outer side wall of the fastening ring is provided with axially extending groove bodies which are circumferentially distributed at intervals.

6. The handle assembly of claim 1, wherein the handle assembly comprises a handle,

The fastening ring is in threaded connection with the shell, wherein an inner ring of the fastening ring is provided with an inner thread, and outer threads matched with the inner thread are arranged on the outer side walls of the end parts of the first shell part and the second shell part.

7. The handle assembly of claim 1, wherein the handle assembly comprises a handle,

A driving unit is accommodated in the hollow cavity of the shell, and is provided with an output shaft extending along the longitudinal direction, and the output shaft is connected with a load positioned outside the shell so as to drive the load to rotate;

Wherein the fastening ring is located at an end of the housing near the output shaft.

8. The handle assembly of claim 1, wherein the thickness of the fastening ring is 20% -40% of the diameter of the inner ring, and wherein the thickness of the fastening ring is in the range of 3-6mm.

9. The handle assembly of claim 1, wherein the handle assembly comprises a handle,

The shell is arranged in half, the first shell part and the second shell part are detachably connected, the first shell part is provided with a first profile opening matched with the second shell part, the second shell part is provided with a second profile opening matched with the first profile opening, one of the first profile opening and the second profile opening is provided with a positioning convex rib, and the other one of the first profile opening and the second profile opening is provided with a positioning groove matched with the positioning convex rib;

The positioning ribs and the positioning grooves are intermittently distributed along the outline of the first profile opening or the outline of the second profile opening.

10. A power tool comprising a handle assembly as claimed in any one of claims 1 to 9.