CN211277842U - Angle grinder - Google Patents

Abstract

The utility model discloses an angle grinder, which belongs to the technical field of hand tools and comprises a shell, a working assembly and a motor, wherein the shell extends along a first axis to form a gripping part, the working assembly is arranged at the first end of the shell and comprises a driven shaft extending along a second axis and a working head connected with the driven shaft, and the second axis is perpendicular to the first axis; the motor set up in the first end of casing, the motor is located work subassembly's oblique top, the motor includes the motor shaft, first axis the second axis the motor shaft coplane, the motor shaft can drive the driven shaft rotates, the motor shaft with contained angle between the first axis is the acute angle. The layout between the motor and the working assembly fully utilizes the space, reduces the volume of the whole machine, makes the layout of the whole machine more compact, and can ensure the balance and stability of the working head in the working process.

Description

Angle grinder

Technical Field

The utility model relates to a hand tool technical field especially relates to an angle grinder.

Background

In the prior art, the angle grinder which is used for handheld operation is widely applied to various industries. The angle grinder generally adopts a motor to drive the working head to do rotary motion, and the rotating speed of the working head can be adjusted through the motor. In the existing angle grinder, a motor shaft of a motor and a rotating shaft where a working head is located are generally vertically arranged, so that the angle grinder occupies a large space, is large in size and is inconvenient to hold and carry. Although some angle grinders are used for arranging the motor shaft to be parallel to the rotating shaft where the working head is located, the size of the motor is not fully considered during arrangement, and the problem of large volume of the whole machine still exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an angle grinder to the unreasonable great technical problem that leads to the complete machine volume of the overall arrangement of the motor that exists among the solution prior art and working head.

As the conception, the utility model adopts the technical proposal that:

an angle grinder, comprising:

a housing including a grip portion traversed by a first axis;

the working assembly is arranged at the first end of the shell and comprises a driven shaft extending along a second axis and a working head connected with the driven shaft, the working head is used for supporting a working accessory, and the second axis is perpendicular to the first axis;

the motor, set up in the first end of casing, the motor is located work subassembly's oblique top, the motor includes the motor shaft, first axis the second axis coplane, the motor shaft can drive the driven shaft rotates, the motor axial first axis the planar projection of second axis place with contained angle between the first axis is the acute angle.

The motor shaft is provided with a driving end and a transmission end, the transmission end is in transmission connection with the driven shaft through a transmission mechanism, and the vertical distance between the transmission end and the second axis is smaller than that between the driving end and the second axis.

The driving end is located obliquely above the driving end and close to the shell.

The transmission mechanism comprises a driving gear arranged on the motor shaft and a driven gear arranged on the driven shaft, the driving gear is meshed with the driven gear, and the upper surface of the driven gear is parallel to the first axis.

The upper surface of the gripping part is lower than the driving end, and the lower surface of the gripping part is higher than the working head.

The motor comprises a stator lamination, the stator lamination is connected with the motor shaft, and the projection of the stator lamination on the second axis is not coincident with the projection of the working assembly on the second axis.

The motor comprises a shell, a stator lamination, a circuit control module and a motor, wherein the shell is internally provided with the circuit control module, and the projection of the stator lamination on the second axis is not coincident with the projection of the circuit control module on the second axis.

Wherein, the motor axial is the first axis, the second axis is the plane projection and the first axis between the included angle is 30 ~ 85.

The angle grinder further comprises a slot, the slot is arranged at the second end of the shell and used for being connected with a battery pack in an inserting and pulling mode, and the battery pack is perpendicular to or parallel to the plane where the first axis and the second axis are located.

Wherein, still include:

the battery pack is arranged at the second end of the shell and can be spliced with the shell, and the upper end of the battery pack inclines towards the direction far away from the shell.

The utility model has the advantages that:

the utility model provides an angle grinder rotates through the driven shaft at the motor shaft drive working head place of motor, realizes the work of working head. The motor is located the oblique top of work subassembly, and the contained angle between motor shaft and the first axis is the acute angle for be the contained angle setting between motor shaft and the driven shaft, make full use of space, reduce the complete machine volume, make the complete machine overall arrangement compacter, be convenient for hold, and can guarantee the equilibrium and the stability of working head in the course of the work.

Drawings

Fig. 1 is a schematic structural diagram of an angle grinder according to an embodiment of the present invention;

fig. 2 is a front view of an angle grinder according to a first embodiment of the present invention;

fig. 3 is a side view of an angle grinder according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a partial block diagram of FIG. 4;

fig. 6 is a schematic structural diagram of a first angle grinder provided in the second embodiment of the present invention;

FIG. 7 is a cross-sectional view of the angle grinder provided in FIG. 6;

fig. 8 is a schematic structural diagram of a second angle grinder provided in the second embodiment of the present invention;

FIG. 9 is a cross-sectional view of the angle grinder provided in FIG. 8;

fig. 10 is a schematic structural view of a third angle grinder provided in the second embodiment of the present invention;

FIG. 11 is a cross-sectional view of the angle grinder provided in FIG. 10;

fig. 12 is a schematic structural diagram of a fourth angle grinder according to the second embodiment of the present invention.

In the figure:

1. a housing; 11. a grip portion; 12. a circuit control module;

2. a working assembly; 21. a driven shaft;

3. a motor; 31. a motor shaft; 32. a stator lamination; 33. rotor lamination;

4. a battery pack; 41. an elastic rod.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting 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, detachably 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Example one

Referring to fig. 1 to 5, the embodiment of the present invention provides an angle grinder, but the principle of the embodiment can be applied and is not limited to the following: and tools needing to be connected with electricity, such as a screwdriver, an electric drill, a wrench, a jig saw and the like.

The angle grinder comprises a shell 1, a working assembly 2, a motor 3 and a battery pack 4, wherein the shell 1 forms a gripping part 11 and is provided with a first axis penetrating through the gripping part 11, and the gripping part 11 is convenient to hold; work module 2 and motor 3 all set up in the first end of casing 1, and battery package 4 sets up in the second end of casing 1, and motor 3 is located work module 2's oblique top. The working assembly 2 comprises a driven shaft 21 extending along the second axis and a working head connected with the driven shaft 21 and used for supporting working accessories such as abrasive sheets and the like so as to drive the abrasive sheets to rotate by the rotation of the driven shaft 21 and output cutting and polishing workpieces. The second axis is perpendicular to the first axis, motor 3 includes motor shaft 31, first axis, the second axis coplane, motor shaft 31 can drive driven shaft 21 and rotate, realize the work of working head, motor shaft 31 is to first axis, the contained angle between the projection of second axis place plane and the first axis is the acute angle, it sets up to be the contained angle between motor shaft 31 and the driven shaft 21, make full use of space, reduce the complete machine volume, make the complete machine overall arrangement compacter, be convenient for hold, and can guarantee the equilibrium and the stability of working head during operation.

The motor shaft 31 may be coplanar with the first axis and the second axis, with the motor 3 disposed directly in front of the grip portion 11, and the motor shaft 31 disposed obliquely with respect to the first axis such that the included angle between the motor shaft 31 and the first axis is an acute angle. In another embodiment, the motor shaft 31 is not coplanar with the plane of the first axis and the second axis, and the motor 3 extends to the side of the grip 11, so that the volume of the motor 3 on one side of the housing 1 can be reduced to leave an escape space for working with the angle grinder.

A circuit control module 12 is arranged in the shell 1, and a switch structure is arranged on the gripping part 11, so that the control can be conveniently carried out by one hand when the electric appliance is held. The switch structure is electrically connected with the circuit control module 12, and the start and stop of the motor 3 can be controlled through the switch structure, so that the working principle is not described in detail.

The included angle between the projection of the motor shaft 31 to the plane where the first axis and the second axis are located and the first axis is 30-85 degrees, namely the included angle between the motor shaft 31 and the driven shaft 21 is 15-60 degrees, so that the requirement of reducing the size can be met, and the transmission connection between the motor shaft 31 and the driven shaft 21 is facilitated. In the present embodiment, the motor 3 is an external rotor motor. For the sake of clarity, in fig. 4, I denotes a first axis, II denotes a second axis, and III denotes an axis of the motor shaft 31.

The motor shaft 31 has a driving end and a transmission end, the transmission end is in transmission connection with the driven shaft 21 through a transmission mechanism, and the vertical distance between the transmission end and the second axis is smaller than that between the driving end and the second axis. That is, in the layout, the driving end of the motor shaft 31 is close to the driven shaft 21, and the driving end extends obliquely in a direction away from the driven shaft 21, so that the arrangement of the motor shaft 31 along the second axis occupies a minimum space to reduce the overall volume.

The driving end is located the oblique top of transmission end and is close to casing 1, and the working head is located the bottommost promptly, and the transmission end of motor shaft 31 and driven shaft 21 cooperate, and the driving end of motor shaft 31 extends to the oblique top of driven shaft 21 for motor 3 and working module 2 can be arranged at the one end of casing 1 symmetry, avoid the focus skew too much to cause the working process unstability.

In the present embodiment, the transmission mechanism includes a driving gear provided on the motor shaft 31 and a driven gear provided on the driven shaft 21, the driving gear being engaged with the driven gear. The upper surface of the driven gear is parallel to the first axis, and the grip 11 may be arranged to extend along the first axis, with the direction of extension of the driven shaft 21 and the grip 11 being relatively perpendicular or approximately perpendicular. Because there is the contained angle between motor shaft 31 and the driven shaft 21, driving gear and driven gear are bevel gear, and the cone angle of bevel gear equals the contained angle between motor shaft 31 and the driven shaft 21. Of course, in other embodiments, the transmission mechanism may also be a multi-stage transmission, which is not limited herein.

The upper surface of the grip portion 11 is lower than the driving end, i.e., the highest position of the motor 3 is higher than the grip portion 11. In order to avoid interference with the normal work of the working head, the working head is generally arranged at the oblique lower part of the shell 1, so that the working head is lower than the lower surface of the gripping part 11 of the shell 1, and the motor 3 positioned at the oblique upper part of the working head is arranged higher than the gripping part 11, so as to ensure the balance and avoid unstable working process caused by too much center of gravity shift.

The motor 3 comprises a stator lamination 32 and a rotor lamination 33, the stator lamination 32 is connected with the motor shaft 31, the projection of the stator lamination 32 on the second axis is not coincident with the projection of the working assembly 2 on the second axis, and the size of the whole machine on the first axis, namely the length direction, is reduced.

Further, in one embodiment, the grip portion is arranged to extend along the first axis, the stator lamination 32 is arranged around the circumference of the motor shaft, the upper surface of the grip portion is lower than the stator lamination 32, because the stator lamination 32 occupies a certain space in the radial direction, and the stator lamination 32 is arranged higher than the housing, so that the size of the whole machine in the width direction, i.e., the second axis direction, can be properly increased to reduce the size of the whole machine in the length direction.

The projection of the stator lamination 32 on the second axis is not coincident with the projection of the circuit control module 12 on the second axis, and the size layout is also considered, so that the size of the whole machine in the width direction is fully utilized, and the width size and the length size of the whole machine are fully considered, so that the reasonable layout is facilitated.

The battery pack 4 is arranged at the second end of the shell 1, namely, at the end far away from the working component 2, and the gravity center is prevented from inclining to one end, so that the stability of the whole machine during working is ensured. In the embodiment, the battery pack 4 is inserted into the housing 1, so that the mounting and dismounting are convenient, and after the battery pack 4 is inserted into the housing 1, the battery pack 4 is electrically connected with the circuit control module 12 in the housing 1, so that the power supply is convenient; when the battery pack 4 is not powered on, the battery pack can be replaced by pulling out the battery pack with force.

In the present embodiment, the battery pack 4 is located at the bottom of the case 1. Specifically, be provided with the slot on casing 1, be provided with the recess in the slot, one side of battery package 4 is provided with elastic rod 41, and the tip of elastic rod 41 is provided with the arch, makes elastic rod 41 insert the slot in through pressing elastic rod 41, loosens elastic rod 41 for the arch can cooperate with the recess joint, and battery package 4 and casing 1 butt simultaneously to realize battery package 4 spacing.

The first end of the shell 1 is a head, the second end of the shell 1 is a tail, the shell 1 is further provided with an upper portion, a lower portion and a side portion, the working head and the motor 3 are arranged at the head of the shell 1, the battery pack 4 is arranged at the tail of the shell 1, in the implementation, the slot is arranged at the tail of the shell 1, and the battery pack 4 is transversely inserted below the shell 1 to be matched with the shell 1.

Example two

Fig. 6 to 12 show a second embodiment, wherein the same or corresponding parts as in the first embodiment are provided with the same reference numerals as in the first embodiment. For the sake of simplicity, only the differences between the second embodiment and the first embodiment will be described. The difference is that the upper end of the battery pack 4 is inclined in the direction away from the housing 1, so that the battery pack 4 protrudes out of the upper surface of the housing 1 as little as possible, and when a user holds the grip part 11 with a hand, the battery pack 4 can be prevented from protruding and touching the arm, and the use is facilitated. The position of the battery pack 4 is different and is set according to actual needs, so that the battery pack is not influenced by hand holding, the center of gravity is centered as much as possible, and the battery pack is convenient to process and produce.

Referring to fig. 6 and 7, the slot is disposed at the tail of the housing 1, the battery pack 4 is transversely inserted above the housing 1 to be matched with the housing 1, and the inserting and pulling directions of the battery pack 4 and the slot are parallel to the plane where the first axis and the second axis are located, so that a relatively large avoiding space is reserved for the lower portion of the angle grinder. Referring to fig. 8 and 9, the slot is disposed at the upper portion of the housing 1, the battery pack 4 is inserted downward at the tail portion of the housing 1 to be matched with the housing 1, and the inserting and extracting directions of the battery pack 4 and the slot are also parallel to the plane where the first axis and the second axis are located. Referring to fig. 10 and 11, the slot is disposed at a side portion of the housing 1, the battery pack 4 is inserted into the housing 1 at a rear side of the housing 1, and a direction of inserting and extracting the battery pack 4 into and from the slot is perpendicular to a plane where the first axis and the second axis are located. Referring to fig. 12, the slot is disposed at an upper side of the housing 1, and the battery pack 4 is inserted into the housing 1 at a rear side of the housing 1.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. An angle grinder, comprising:

a housing (1), the housing (1) comprising a grip portion (11) penetrated by a first axis;

the working assembly (2) is arranged at the first end of the shell (1), the working assembly (2) comprises a driven shaft (21) extending along a second axis and a working head connected with the driven shaft (21), the working head is used for supporting working accessories, and the second axis is perpendicular to the first axis;

motor (3), set up in the first end of casing (1), motor (3) are located the oblique top of work subassembly (2), motor (3) include motor shaft (31), first axis the second axis coplane, motor shaft (31) can drive driven shaft (21) rotate, motor shaft (31) to first axis the planar projection of second axis place with contained angle between the first axis is the acute angle.

2. The angle grinder of claim 1, wherein the motor shaft (31) has a drive end and a drive end, the drive end being drivingly connected to the driven shaft (21) via a transmission, the vertical distance between the drive end and the second axis being smaller than the vertical distance between the drive end and the second axis.

3. The angle grinder of claim 2, characterized in that the drive end is located obliquely above the drive end and close to the housing (1).

4. The angle grinder of claim 2, wherein the transmission mechanism includes a drive gear provided on the motor shaft (31) and a driven gear provided on the driven shaft (21), the drive gear being in mesh with the driven gear, an upper surface of the driven gear being parallel to the first axis.

5. The angle grinder of claim 2, wherein the upper surface of the grip portion (11) is lower than the driving end, and the lower surface of the grip portion (11) is higher than the working head.

6. The angle grinder of claim 1, characterized in that the motor (3) comprises stator laminations (32), the stator laminations (32) being coupled to the motor shaft (31), the projection of the stator laminations (32) on the second axis being non-coincident with the projection of the working assembly (2) on the second axis.

7. The angle grinder of claim 6, characterized in that a circuit control module (12) is arranged in the housing (1), the projection of the stator laminations (32) on the second axis being non-coincident with the projection of the circuit control module (12) on the second axis.

8. The angle grinder of any one of claims 1 to 7, wherein the projection of the motor shaft (31) to the plane of the first axis and the second axis is at an angle of 30 ° to 85 ° to the first axis.

9. The angle grinder of claim 8, further comprising a slot disposed at the second end of the housing (1) for inserting a battery pack (4), wherein the insertion and extraction directions of the battery pack (4) and the slot are perpendicular or parallel to the plane where the first axis and the second axis are located.

10. The angle grinder of any one of claims 1-7, further comprising:

the battery pack (4) is arranged at the second end of the shell (1), the battery pack (4) can be spliced with the shell (1), and the upper end of the battery pack (4) inclines towards the direction far away from the shell (1).

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