CN216830181U

CN216830181U - Angle grinder

Info

Publication number: CN216830181U
Application number: CN202220203221.9U
Authority: CN
Inventors: 金伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-06-28
Anticipated expiration: 2032-01-25

Abstract

The utility model discloses an angle grinder, relate to electric tool technical field, the operation body is used for the control action head end to polish, the one end and the operation body of head shell can be dismantled and be connected, the other end and the protecgulum of head shell can be dismantled and be connected, and brushless motor installs in the head shell, head shell and protecgulum are stretched out to the one end of rotor shaft, the periphery of rotor shaft is located to the bearing housing, the protecgulum is located the bearing periphery, install the locating part and can follow the synchronous rotation of rotor shaft with dismantling and install on the rotor shaft, the shaft shoulder of one side contact rotor shaft of bearing, opposite side contact installation locating part, and the shaft shoulder of installing locating part and rotor shaft can press from both sides tight bearing, the installation locating part is used for installing cutting grinding tool. The angle grinder is convenient for dismounting and maintaining the cutting and grinding tool, can improve the product quality, improves the product assembly process, and better meets the after-sale service requirements of customers.

Description

Angle grinder

Technical Field

The utility model relates to an electric tool technical field specifically is a relate to an angle mill.

Background

Because the nearly output end of traditional direct drive angle mill rotor shaft has a great head for rotor assembly's assembly is comparatively difficult, and its assembling process is: firstly, pressing a rotor shaft into a front cover component (a bearing and a clamp spring are arranged in the front cover component); secondly, respectively pressing and mounting the rotor end plate and the rotor iron core on the rotor shaft; thirdly, the fan blades are pressed and installed at the corresponding positions of the rotor shaft; fourthly, the small bearing is pressed on a bearing stop of the rotor shaft; fifthly, the assembled front cover and the rotor assembly are put into the head shell together. The product of assembly like this, if there is the quality problem of protecgulum or protecgulum bearing, just must tear down little bearing, fan blade, rotor core respectively in proper order, and the rotor end plate recompresses the rotor shaft, makes whole rotor assembly also then scrap like this. Another defect of the traditional direct-drive angle grinder dismounting structure is that rotor balance cannot be corrected, and vibration of the whole grinder is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an angle mill to solve the problem that above-mentioned prior art exists, make things convenient for cutting grinding tool's dismouting and product maintenance, can improve product quality simultaneously, promote product assembly process, satisfy customer's after-sales service requirement better.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides an angle grinder, which comprises an operation body and an action head end which are connected in sequence, wherein the operation body is used for controlling the grinding of the action head end, the action head end comprises a brushless motor, a bearing, a cutting and grinding tool, a head shell, a front cover and an installation limiting part which are sequentially arranged along the axial direction of a rotor shaft of the brushless motor, one end of the head shell is detachably connected with the operation body, the other end of the head shell is detachably connected with the front cover, the brushless motor is installed in the head shell, one end of the rotor shaft extends out of the head shell and the front cover, the bearing sleeve is arranged on the periphery of the rotor shaft, the front cover is positioned on the periphery of the bearing, the installation limiting part can be detachably installed on the rotor shaft and can follow the rotor shaft to synchronously rotate, one side of the bearing is contacted with the shaft shoulder of the rotor shaft, the opposite side contact installation locating part, just installation locating part with the shaft shoulder of rotor shaft can press from both sides tightly the bearing, installation locating part is used for installing cutting grinding tool.

Preferably, the installation locating part includes apart from cover and clamp plate group, the distance cover is overlapped and is located the periphery of rotor shaft, keep away from on the protecgulum the mounting hole has been seted up at the one end middle part of head shell, the distance cover is including fixed connection's the section of stretching into in proper order and stretch out the section, the external diameter that stretches into the section is less than stretch out the external diameter of section, it is located to stretch into the section in the mounting hole, it is located to stretch out the section the protecgulum is outside, stretch out to keep away from on the section the one end of protecgulum is close to clamp plate group, clamp plate group with the rotor shaft can be connected with dismantling, just clamp plate group is used for the installation cutting grinding instrument.

Preferably, the protruding section and the protruding section are coaxially arranged.

Preferably, the dustproof cover comprises an inner wall, a cover plate and an annular outer wall, wherein the inner wall and the annular outer wall are respectively arranged on an inner ring and an outer ring of the cover plate, and the inner wall and the annular outer wall are both vertical to the cover plate;

the dustproof cover is characterized in that one side, far away from the head shell, of the front cover is provided with an annular groove surrounding the dustproof cover, the annular groove is internally used for containing the annular outer wall, a gap between the inner wall of the mounting hole and the outer wall of the stretching section is used for containing the inner wall, and the cover plate can contact the end face, close to the stretching section, of the stretching section.

Preferably, the pressing plate group comprises an upper pressing plate and a lower pressing plate, the upper pressing plate is connected to the periphery of the rotor shaft in a threaded mode, the lower pressing plate is sleeved on the periphery of the rotor shaft, and the cutting and grinding tool is installed between the upper pressing plate and the lower pressing plate.

Preferably, the protruding section abuts against the lower platen.

Preferably, the protruding section is fixedly connected with the lower pressing plate.

Preferably, the cutting and grinding tool further comprises a protective cover, wherein the protective cover is detachably mounted on one side of the mounting limiting part and is close to the operating body, and the protective cover can be covered on part of the periphery of the cutting and grinding tool.

Preferably, the operation body includes handle, lithium cell package, switch and heat dissipation mechanism, the lithium cell package install in one side of handle, the switch install in on the handle, and be used for control the action head end is polished, heat dissipation mechanism is used for right the inside heat dissipation of action head end.

Preferably, heat radiation structure includes air intake, inlet air duct, fan blade, air outlet and keeps out the wind component, the air intake set up in keep away from on the handle one side of action head end, the air outlet set up in one side of action head end and with action head end inner chamber intercommunication, keep out the wind the component and install action head is served, just keep out the wind component and be located the air intake with between the air outlet, keep out the wind the component with be equipped with between the action head end inner wall inlet air duct, inlet air duct keeps away from the air outlet sets up, inlet air duct's both ends communicate respectively the air intake with action head end inner chamber, the fan blade centers on the periphery installation of rotor shaft, and can follow the rotor shaft rotates.

The utility model discloses for prior art gain following technological effect:

the utility model provides an angle grinder, the action head end includes brushless motor, a bearing, cutting grinding tool, and the head shell of arranging in proper order along brushless motor's rotor shaft axial, protecgulum and installation locating part, set up brushless motor inside the action head end, compare and set up the motor in the operation originally internally in current, gear drive mechanism has been reduced, moreover, the steam generator is simple in structure, therefore, the cost is reduced, the periphery of rotor shaft is located to the bearing housing, and bearing housing and rotor shaft clearance fit, the protecgulum is located the bearing periphery, clearance fit compares in current interference fit, can easy to assemble and dismantle, and then be convenient for proofread and correct the balance to brushless motor, reduce the vibration in the course of the work, press from both sides the bearing through the shaft shoulder cooperation of installation locating part and rotor shaft simultaneously, overall structure's stability when improving and polishing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of an angle grinder provided by the present invention;

FIG. 2 is a top view of a distance sleeve in an angle grinder provided by the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a schematic view of the rotor shaft and the fan blade of the present invention;

FIG. 5 is a schematic view of the middle head shell and the wind shielding rib of the present invention;

in the figure: 100-angle grinder, 1-operation body, 2-action head end, 3-handle, 4-switch, 5-lithium battery pack, 6-air inlet, 7-air outlet, 8-air inlet channel, 9-wind shield, 10-wind shield rib, 11-head shell, 12-front cover, 13-fan blade, 14-brushless rotor assembly, 15-brushless stator, 16-snap spring, 17-bearing, 18-distance sleeve, 19-lower pressing plate, 20-upper pressing plate, 21-cutting grinding tool, 22-protective cover, 23-rotor shaft, 24-dust cover, 25-extension section, 26-extension section, 27-rotor iron core and 28-magnetic tile.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model aims at providing an angle mill to solve current angle mill structure complicacy, ann tear inconvenient technical problem open.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

As shown in fig. 1-5, the present invention provides an angle grinder 100, which comprises an operating body 1 and an action head end 2 connected in sequence, wherein the operating body 1 is used for controlling the grinding of the action head end 2, the action head end 2 comprises a brushless motor, a bearing 17, a cutting and grinding tool 21, and a head housing 11, a front cover 12 and an installation limiting part arranged in sequence along the axial direction of a rotor shaft 23 of the brushless motor, the brushless motor is arranged inside the action head end 2, compared with the existing method of arranging the motor in the operating body 1, the gear transmission mechanism is reduced, the structure is simple, the cost is reduced, the brushless motor comprises a brushless rotor assembly 14, a brushless stator 15 and a rotor shaft 23, a rotor core 27 and a magnetic shoe 28 are arranged in the brushless rotor assembly 14, one end of the head housing 11 is detachably connected with the operating body 1, the other end of the head housing 11 is detachably connected with the front cover 12, the brushless motor is installed in the head housing 11, one end of the rotor shaft 23 is rotatably connected with the head housing 11, preferably, the rotatable connection can be realized by a small bearing, a needle bearing or a copper bush, the other end of the rotor shaft 23 extends out of the head housing 11 and the front cover 12, the bearing 17 is sleeved on the periphery of the rotor shaft 23, preferably, the bearing 17 is in clearance fit with the rotor shaft 23, the front cover 12 is positioned on the periphery of the bearing 17, the clearance fit is compared with the existing interference fit, the installation and the disassembly can be convenient, the balance of the brushless motor can be conveniently calibrated, the vibration in the working process can be reduced, the installation limiting part can be detachably installed on the rotor shaft 23 and can synchronously rotate along with the rotor shaft 23, one side of the bearing 17 contacts with a shaft shoulder of the rotor shaft 23, the other side contacts with the installation limiting part, the bearing 17 is clamped by matching of the installation limiting part and the shaft shoulder of the rotor shaft 23, and the connection is stable, still be convenient for the dismouting, overall structure's stability when improving to polish, installation locating part is used for installing cutting grinding tool 21, and preferably, cutting grinding tool 21 can be cutting piece, emery wheel, polishing wheel, hundred impeller wheels, carpenter's saw bit, wool wheel, bowl wheel etc. nevertheless the utility model provides an angle mill 100 in cutting grinding tool 21's specific structure be not limited to above-mentioned injecing, the technical staff in the field can choose suitable instrument for use according to the actual work needs.

Specifically, the installation limiting part includes a distance sleeve 18 and a pressing plate set, the distance sleeve 18 is sleeved on the periphery of a rotor shaft 23, a mounting hole is formed in the middle of one end of the front cover 12, which is far away from the head shell 11, for installation of the distance sleeve 18 and extension of the rotor shaft 23, as shown in fig. 2-3, the distance sleeve 18 includes an extending section 25 and an extending section 26 which are fixedly connected in sequence, the outer diameter of the extending section 25 is smaller than that of the extending section 26, the extending section 25 and the extending section 26 are coaxially arranged, that is, the outer walls of the extending section 25 and the extending section 26 form a limiting step, the end face, which is close to the extending section 25, of the extending section 26 forms a step face, the extending section 25 is located in the mounting hole, the extending section 26 is located outside the front cover 12, so as to limit the dust cover 24, preferably, the extending section 25 and the extending section 26 are hollow, and the hollow shapes of the hollow sections are all oblate squares, and are corresponding to and connected with the rotor shaft 23 in a matching manner, the excircle portion of stretching out section 26 is equipped with the oblate square, can make apart from cover 18 and open-end wrench and outer spanner to cooperate, is convenient for ann to tear open, and then is convenient for tear open of cutting grinding tool 21 and trade, improves dismouting efficiency, stretches out the one end of keeping away from protecgulum 12 on the section 26 and is close to clamp plate group, and clamp plate group and rotor shaft 23 can be connected with dismantling, conveniently ann tear open, and clamp plate group is used for installing cutting grinding tool 21. Preferably, a clamp spring hole is further formed in the inner wall of the front cover 12, a clamp spring 16 is mounted in the clamp spring hole, the inner wall of the clamp spring 16 extends out of the clamp spring hole, and the lower end face of the clamp spring 16 can abut against the upper end face of the bearing 17.

The utility model provides an angle grinder 100 still includes shield 24, shield 24 includes the inner wall, apron and annular outer wall, inner wall and annular outer wall are installed respectively in the inner circle and the outer lane of apron, inner wall and annular outer wall are all perpendicular with the apron, the annular groove around shield 24 setting is seted up to one side of keeping away from first shell 11 on the protecgulum 12, be used for holding annular outer wall in the annular groove, lateral wall is used for the holding inner wall with the clearance of stretching into between the section 25 outer walls in the mounting hole, the apron can contact the step face, connect stably, cooperation through protecgulum 12 and shield 24, and then avoid polishing the in-process, the dust that produces gets into inside first shell 11 and protecgulum 12, influence whole life.

The clamp plate group includes that threaded connection locates the holding down plate 19 of rotor shaft 23 periphery with the cover in the top board 20 of rotor shaft 23 periphery, threaded connection can be when guaranteeing connection stability, still conveniently ann tears open, when the damage of protecgulum 12 or bearing 17 appears, need not tear whole brushless motor open, therefore, the cost is reduced, also reduce the after-sale maintenance degree of difficulty simultaneously, holding down plate 19 is narrow formula structure under the last width, and cutting grinding tool 21 cover locates the narrow section of holding down plate 19, can compress tightly cutting grinding tool 21 through the cooperation of top board 20 and holding down plate 19, realize cutting grinding tool 21's fixed.

As an embodiment, the protruding section 26 abuts against the lower pressing plate 19, so as to facilitate detachment, but the connection manner of the protruding section 26 and the lower pressing plate 19 is not limited to abutment, and in the actual production process, the protruding section 26 and the lower pressing plate 19 may also be fixedly connected, i.e. the distance sleeve 18 and the lower pressing plate 19 are a single integral component.

The utility model provides an angle grinder 100 still includes protection casing 22, and protection casing 22 can be installed in one side of installation locating part with dismantling, and is close to operation body 1 setting, and protection casing 22 can cover the part periphery of locating cutting grinding tool 21, and cutting grinding tool 21's partly can rotate to being located the region that protection casing 22 was enclosed promptly, and then shelters from near the part that the hand held the end on cutting grinding tool 21 through protection casing 22, avoids appearing the incident.

Operation body 1 includes handle 3, lithium cell package 5, switch 4 and heat dissipation mechanism, and lithium cell package 5 is installed in one side of handle 3 for the power supply, and switch 4 installs on handle 3, and is used for controlling action head end 2 and polishes, carries out the switching action according to actual need, and heat dissipation mechanism is used for dispelling the heat and dispel the heat to the controller to the inside of action head end 2, avoids spare part overheated to cause the damage.

As shown in fig. 1 and 5, the heat dissipation structure includes an air inlet 6, a fan blade 13, an air inlet channel 8, an air outlet 7 and a wind shielding element, the air inlet 6 is disposed on one side of the handle 3 away from the action head end 2, the air outlet 7 is disposed on one side of the action head end 2 and communicated with the inner cavity of the action head end 2, the wind shielding element is mounted on the action head end 2 and located between the air inlet 6 and the air outlet 7, so that external wind enters the inner cavity of the operation body 1 through the air inlet 6, bypasses the wind shielding element, is guided through the air inlet channel 8 of the head housing 11, then passes through the fan blade 13, and finally is discharged through the air outlet 7, thereby improving the heat dissipation effect, preventing the wind entering from the air inlet 6 from directly discharging from the air outlet 7 without passing through elements such as the brushless motor, the air inlet channel 8 is disposed between the wind shielding element and the inner wall of the action head end 2, and the air inlet channel 8 is disposed away from the air outlet 7, realize the water conservancy diversion to wind through inlet air channel 8, with the leading-in to brushless motor department of wind, inlet air channel 8's both ends communicate air intake 6 and the 2 inner chambers of action head end respectively, and fan blade 13 is installed around the periphery of rotor shaft 23 to can follow rotor shaft 23 and rotate, and then realize the cooling. Preferably, the wind shielding element comprises a wind shielding plate 9 and a wind shielding rib 10, the wind shielding plate 9 is parallel to the rotor shaft 23, the upper end of the wind shielding plate 9 is fixed on the inner top surface of the head shell 11, the lower end of the wind shielding plate 9 extends downwards but does not contact with the inner bottom surface of the head shell 11, the wind shielding rib 10 is tightly matched and connected with the wind shielding plate 9, and a wind inlet channel 8 is formed between the wind shielding rib 10 and the inner wall of the head shell 11. The controller is further arranged at the air inlet 6, and heat dissipation of the controller is facilitated.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present description should not be construed as a limitation of the present invention.

Claims

1. An angle grinder, characterized in that: the polishing device comprises an operation body and an action head end which are connected in sequence, wherein the operation body is used for controlling the action head end to polish, the action head end comprises a brushless motor, a bearing, a cutting and grinding tool, a head shell, a front cover and an installation limiting part, the head shell, the front cover and the installation limiting part are sequentially arranged along the axial direction of a rotor shaft of the brushless motor, one end of the head shell is detachably connected with the operation body, the other end of the head shell is detachably connected with the front cover, the brushless motor is installed in the head shell, one end of the rotor shaft extends out of the head shell and the front cover, the bearing sleeve is arranged on the periphery of the rotor shaft, the front cover is arranged on the periphery of the bearing, the installation limiting part can be detachably installed on the rotor shaft and can synchronously rotate along with the rotor shaft, one side of the bearing is in contact with a shaft shoulder of the rotor shaft, the other side of the bearing is in contact with the installation limiting part, and the bearing can be clamped by the installation limiting part and the shaft shoulder of the rotor shaft, and the installation limiting part is used for installing the cutting and grinding tool.

2. The angle grinder of claim 1, wherein: the installation locating part includes apart from cover and clamp plate group, locate apart from the ways the periphery of rotor shaft, keep away from on the protecgulum the mounting hole has been seted up at the one end middle part of head shell, stretch into the section and stretch out the section including fixed connection in proper order apart from the cover, the external diameter that stretches into the section is less than stretch out the external diameter of section, it is located to stretch into the section in the mounting hole, it is located to stretch out the section the protecgulum is outside, stretch out to keep away from in the section the one end of protecgulum is close to clamp plate group, clamp plate group with the rotor shaft can be connected with dismantling, just clamp plate group is used for the installation cutting grinding tool.

3. The angle grinder of claim 2, wherein: the extending section and the extending section are coaxially arranged.

4. The angle grinder of claim 2, wherein: the dustproof cover comprises an inner wall, a cover plate and an annular outer wall, wherein the inner wall and the annular outer wall are respectively arranged on an inner ring and an outer ring of the cover plate, and are both vertical to the cover plate;

the dustproof cover is characterized in that an annular groove surrounding the dustproof cover is formed in one side, far away from the head shell, of the front cover, the annular groove is used for containing the annular outer wall, a gap between the inner side wall of the mounting hole and the outer wall of the stretching section is used for containing the inner wall, and the cover plate can contact the end face, close to the stretching section, of the stretching section.

5. The angle grinder of claim 2, wherein: the pressing plate group comprises an upper pressing plate and a lower pressing plate, the upper pressing plate is in threaded connection with the periphery of the rotor shaft, the lower pressing plate is sleeved on the periphery of the rotor shaft, and the cutting and grinding tool is installed between the upper pressing plate and the lower pressing plate.

6. The angle grinder of claim 5, wherein: the extending section is abutted to the lower pressing plate.

7. The angle grinder of claim 5, wherein: the extending section is fixedly connected with the lower pressing plate.

8. The angle grinder of claim 1, wherein: still include the protection casing, the protection casing can install with dismantling in one side of installation locating part, and be close to the operation body sets up, the protection casing can cover and locate cutting and grinding tool's part periphery.

9. The angle grinder of claim 1, wherein: the operation body comprises a handle, a lithium battery pack, a switch and a heat dissipation mechanism, the lithium battery pack is installed on one side of the handle, the switch is installed on the handle and used for controlling the action head end to be polished, and the heat dissipation mechanism is used for dissipating heat inside the action head end.

10. The angle grinder of claim 9, wherein: the heat dissipation mechanism includes air intake, inlet air duct, fan blade, air outlet and the component that keeps out the wind, the air intake is seted up and is kept away from on the handle one side of action head end, the air outlet set up in one side of action head end and with action head end inner chamber intercommunication, the component that keeps out the wind is installed the action head is served, just the component that keeps out the wind is located the air intake with between the air outlet, keep out the wind the component with be equipped with between the action head end inner wall inlet air duct, inlet air duct keeps away from the air outlet sets up, inlet air duct's both ends communicate respectively the air intake with action head end inner chamber, the fan blade centers on the periphery installation of rotor shaft, and can follow the rotor shaft rotates.