CN219685357U - Electric tool shell and electric tool with same - Google Patents

Abstract

The utility model discloses a shell of an electric tool and the electric tool with the shell. The shell of the electric tool comprises a main shell and a rear end cover, wherein the main shell is contacted with the periphery of the rear end cover to form an inner cavity in a surrounding mode, the rear end cover comprises a mounting part and a bearing part for supporting the motor, the main shell comprises an assembling part, and the mounting part is configured to be buckled and combined with the assembling part so as to fixedly mount the rear end cover on the main shell. The electric tool provided by the utility model has the advantages of compact structure, shorter machine body, no screw connection between the rear end cover and the main shell, simple structure, smaller size and more convenient installation.

Description

Electric tool shell and electric tool with same

Technical Field

The present disclosure relates to power tools, and particularly to a housing for a power tool and a power tool having the housing.

Background

Because the conventional power tools are large in size and heavy in weight, and inconvenient to use, the power tools are developed to hand-held power tools which are small in size. The hand-held type is popular with people because of its small size and light weight, so that people with smaller strength, such as women, can use the hand-held type. The more compact and lightweight the power tools are, the more advanced.

The electric tool generally adopts a shell with a Half structure, namely the shell of the electric tool comprises a left Half shell and a right Half shell, an accommodating space is formed by encircling the left Half shell and the right Half shell for mounting a motor, a transmission device and the like, and the left Half shell and the right Half shell are fixed by screws. The electric tool with the shell formed by the left half shell and the right half shell is intended to shorten the machine body, and the electric motor is stacked as high as possible and the mounting distance is shortened under the condition of ensuring the power of the electric motor, or the gearbox is shortened under the condition of ensuring the torque, so that the gear strength is reduced or the number of planetary teeth is reduced. The conventional method for shortening the axial distance is to put the tail end bearing of the motor rotor into a useless hollow position of the fan, so that the axial space, namely the short machine body, is saved.

The shell of the electric tool consists of a left half shell, a right half shell and a rear end cover, wherein the rear end cover is fixedly connected with the left half shell and the right half shell through 4 screws. The shell with the rear end cover can be provided with a shorter machine body, however, the electric tool with the shell is large in radial size, complex in die, more in parts and more in consumable parts, and the cost is increased. In addition, since a plurality of screws are generally required to achieve the fixed mounting, the screws need to be screwed down in order, which increases the number of assembly steps.

Disclosure of Invention

In order to solve the above technical problems, the present utility model provides an electric tool housing and an electric tool having the same.

The utility model provides an electric tool casing, includes main casing and rear end cap, the main casing with the circumference contact of rear end cap is in order to enclose and to close and form inside cavity for hold the motor, the rear end cap includes installation department and support the supporting part of motor, the main casing includes the assembly portion, the installation department be configured to with the buckle of assembly portion combines, in order to with rear end cap fixed mounting in the main casing.

Further, the mounting portion comprises a clamping hook, the assembling portion comprises a clamping groove, and the clamping hook stretches into the clamping groove and is hooked with the main shell.

Further, the number of the clamping hooks is 4, the clamping hooks are uniformly distributed along the circumferential direction of the rear end cover, and the clamping grooves and the clamping hooks are configured in pairs.

Further, the mounting part further comprises a cantilever, and the clamping hook is connected with the cantilever.

Further, one of the main housing and the rear end cap further includes a spigot formed along the peripheral rim, and the other further includes a groove that mates with the spigot.

Further, the main housing is assembled from left and right half-shells.

Further, the rear end cover comprises a circular end wall and a peripheral wall extending along the axial direction from the outer circumferential edge of the end wall, and the clamping hooks are arranged on the peripheral wall.

Further, the utility model also relates to a power tool, comprising the power tool shell, wherein the main shell and the rear end cover are enclosed to form an inner cavity, and a motor and a transmission device are arranged in the inner cavity.

Further, in the electric power tool, the electric power tool includes a bearing, the motor includes a motor shaft, the bearing supports the motor shaft, the bearing portion is provided with a first accommodation space accommodating the bearing, and the accommodation space is formed as a part of the internal chamber.

Further, the rear end cover is further provided with a second accommodating space, the second accommodating space is also formed as a part of the inner cavity, the second accommodating space surrounds the second accommodating space, the motor further comprises a fan, and the fan is accommodated in the second accommodating space.

The technical scheme provided by the utility model has the beneficial effects that:

the shell of the electric tool is formed by assembling the rear end cover and the main shell, so that the machine body of the electric tool can be axially shortened, and the electric tool which is more miniaturized is obtained, thereby being convenient for people to use and operate.

In addition, the rear end cover adopts the mode that buckle and draw-in groove assembly realization fixed connection, avoids using screw fixed connection, has reduced spare part, also can reduce the size of this part of rear end cover formation screw hole simultaneously for the structure is simpler, and the installation is also more convenient.

The spigot is arranged on the main shell, and the groove of the spigot assembled on the rear end cover further strengthens the stability of the rear end cover connected to the main shell, thereby ensuring the coaxiality requirement of the motor on the rotor and the stator. The tang sets up on the main casing rather than the rear end cover for the tang is difficult to break into pieces, also can strengthen the intensity of main casing moreover.

Drawings

Fig. 1 is a schematic view of a housing of a power tool according to an embodiment of the utility model.

Fig. 2a is a side view of the rear end cap in an embodiment of the utility model.

Fig. 2b is a cross-sectional view of fig. 2 a.

Fig. 3a is a cross-sectional view of a power tool in an embodiment of the utility model.

Fig. 3b is an enlarged view of a portion of fig. 3 a.

Fig. 4 is a schematic view of a power tool according to an embodiment of the utility model.

Reference numerals illustrate: a power tool housing-1; an internal chamber-10; a main housing-2; a fitting portion-21; a spigot-22; left half shell-201; right half shell-202; a rear end cover-3; a mounting section-31; hook-311; cantilever-312; a groove-32; a support section-33; a first accommodation space-101; a second accommodation space-102; an end wall-301; a peripheral wall 302; a power tool-100; a motor-4; a motor shaft-41; a fan-42; bearing-5.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present utility model.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

The present embodiment provides a power tool housing 1, which may be a hammer drill, or other hand-held power tool. As shown in fig. 1 to 4, the electric tool housing 1 includes a main housing 2 and a rear cover 3, wherein the main housing 2 contacts with a periphery of the rear cover 3 to form an inner chamber 10 for accommodating a motor 4, the rear cover 3 includes a mounting portion 31 and a bearing portion 33 for supporting the motor 4, the main housing 2 includes a fitting portion 21, and the mounting portion 31 is configured to be snap-coupled with the fitting portion 21 to fixedly mount the rear cover 3 to the main housing 2.

As shown in fig. 1 and 3a, the rear end cover 3 of the electric tool housing 1 is snap-fitted with the mounting portion 31 and the fitting portion 21 on the main housing 2 to mount the rear end cover 3 on the main housing 2, instead of the prior art in which the screw mounting is adopted. Therefore, the rear end cover 3 and the main housing 2 do not need to be provided with screw punching holes, so that the structures of the main housing 2 and the rear end cover 3 are simpler, the overall dimension of the electric tool housing 1 can be reduced, and the consumption of parts and housings can be reduced, thereby reducing the production cost. In addition, the rear end cover 3 in the embodiment can be assembled to the main casing 2 at one time, so that the tool is simpler and quicker.

Specifically, as shown in fig. 2a, the mounting portion 31 includes a hook 311, the assembling portion 21 includes a slot, and the hook 311 extends into the slot and hooks the main housing 2.

Preferably, the number of the hooks 311 is 4, and the hooks 311 are uniformly distributed along the circumferential direction of the rear end cover 3, and the slots are configured in pairs with the hooks 311. As shown in fig. 2b, the mounting portion 31 further includes a cantilever 312, and the hook 311 is connected to the cantilever 312, so that the hook 311 has a certain elasticity. When the rear end cover 3 is installed, the cantilever 312 deforms to enable the clamping hooks 311 to enter the clamping grooves of the shell 1, and the clamping hooks 311 can be hooked with the main shell 2 after the cantilever 312 is restored to the original state, so that the rear end cover 3 is fixedly connected with the main shell 2.

Preferably, as shown in fig. 2a, the rear end cover 3 includes a circular end wall 301 and a peripheral wall 302 extending axially from an outer circumferential edge of the end wall 301, and the hooks 311 are disposed on the peripheral wall 302. The peripheral wall 302 of the rear cover 3 has a short length extending in the axial direction to obtain a short body of the electric tool.

One of the main housing 2 and the rear end cap 3 further includes a spigot 22 provided along a circumferential ring, and the other one further includes a groove 32 fitted with the spigot 22. When the rear end cover 3 is mounted on the main housing 2, the spigot 22 can enter the groove 32, so that the connection stability of the rear end cover 3 and the main housing 2 is further enhanced.

Preferably, in this embodiment, as shown in fig. 1 and 4, the spigot 22 is provided on the main housing 2, and the rear cover 3 is provided with the groove 32. In this way, the provision of the spigot 22 on the main casing 2 not only can enhance the strength of the main casing 2, but also the spigot 22 is less likely to be damaged relative to that provided on the rear end cover 3.

Specifically, the spigot 22 is an annular protrusion and is disposed on the main housing 2, and a notch is further formed on the spigot 22, and the notch forms the assembly portion 21. The groove 32 is provided on the peripheral wall 302 of the rear cover 3. When the rear end cover 3 is mounted on the main housing 2, the mounting portion 31 in the rear end cover 3 passes through the notch of the mounting portion 21, the clamping hook 311 of the mounting portion 31 enters the interior of the main housing 2 and hooks the shell of the mounting portion 21 of the main housing 2, and the spigot 22 on the main housing 2 is embedded into the groove 32 of the rear end cover 3, so that the rear end cover 3 is fixedly connected with the main housing 2, and the requirement of the motor rotor and the stator on coaxiality is ensured.

In the present embodiment, as shown in fig. 1, the main casing 2 is assembled from a left half casing 201 and a right half casing 202. In other embodiments, the main housing 2 may also be an annular outer shell. In the present embodiment, when assembling the electric power tool 100, the motor 4, the transmission device, and the like may be mounted in one of the half-shells of the main housing 2, the other half-shell may be fixed thereto, and the rear cover 3 may be mounted to the main housing 2 after the main housing 2 and its internal parts are assembled.

The utility model also relates to a power tool, comprising the power tool housing 1, wherein the main housing 2 and the rear end cover 3 are enclosed to form an inner cavity 10, and a motor 4 and a transmission device are arranged in the inner cavity 10.

As shown in fig. 3a and 3b, in the electric tool, the electric tool 100 includes a bearing 5, the motor 4 includes a motor shaft 41, and the bearing 5 supports the motor shaft 41, so as to further ensure coaxiality of a motor rotor and a motor stator. The support portion 33 is provided with a first accommodation space 101 accommodating the bearing 5, the first accommodation space 101 forming a part of the inner chamber 10.

The rear cover 3 is further provided with a second accommodating space 102, and specifically, the second accommodating space 102 is formed by an end wall 301 and a peripheral wall 302 of the rear cover 3, and a supporting portion 33. The second receiving space 102 is also formed as a part of the inner chamber 10, and the second receiving space 102 surrounds the first receiving space 101. The motor 4 further includes a fan 42, and the fan 42 is accommodated in the second accommodating space 102. Therefore, the space in the electric power tool 100 is fully utilized in the axial direction, the electric power tool 100 is smaller in both the axial and radial dimensions, miniaturization of the electric power tool 100 is achieved, and the external shape is simpler.

The present utility model is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present utility model can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (10)

1. The utility model provides a power tool casing, its characterized in that includes main casing and rear end cap, main casing with the rear end cap encloses and closes and form the inside cavity for hold the motor, the rear end cap includes installation department and support the supporting part of motor, main casing includes the assembly portion, the installation department be configured to with the buckle of assembly portion combines, in order to with rear end cap fixed mounting in main casing.

2. The power tool housing of claim 1, wherein the mounting portion includes a catch, and the mounting portion includes a slot, the catch extending into the slot and hooking the main housing.

3. The power tool housing according to claim 2, wherein the number of the hooks is 4, and the hooks are uniformly distributed along the circumferential direction of the rear end cover, and the clamping grooves are arranged in pairs with the hooks.

4. The power tool housing of claim 2, wherein the mounting portion further comprises a cantilever arm, the catch being coupled to the cantilever arm.

5. The power tool housing of claim 1, wherein one of the main housing and the rear end cap further comprises a spigot disposed along the perimeter, and wherein the other further comprises a groove that mates with the spigot.

6. The power tool housing of claim 1, wherein the main housing is assembled from left and right half shells.

7. The power tool housing according to claim 2, wherein the rear end cap includes an end wall having a circular shape and a peripheral wall extending in an axial direction from an outer peripheral edge of the end wall, the catch being provided to the peripheral wall.

8. A power tool comprising a power tool housing according to any one of claims 1 to 7, said main housing and said rear end cap enclosing an internal chamber in which a motor and transmission are mounted.

9. The power tool according to claim 8, wherein the power tool includes a bearing that supports a motor shaft of the motor, the bearing portion being provided with a first receiving space that accommodates the bearing, the first receiving space being formed as a part of the internal chamber.

10. The power tool of claim 9, wherein the rear end cap is further provided with a second receiving space also formed as part of the interior chamber, the second receiving space surrounding the first receiving space;

the motor further comprises a fan, and the fan is accommodated in the second accommodating space.