Compact high-voltage brushless angle grinder structure

Abstract

The utility model discloses a compact high-pressure brushless angle grinder structure, which relates to the related technical field of angle grinders, and comprises a lower casing and an upper casing which are detachably connected, a through connecting cavity is arranged in the upper casing, a through mounting cavity is arranged in the lower casing, and the upper casing and the lower casing are detachably connected. A rectifying ring used for air diversion and a connecting cover used for fixing a stator are arranged between the upper machine shell and the lower machine shell, the stator is clamped in the mounting cavity, the two ends of the connecting cover abut against the rectifying ring and the stator respectively, a step-shaped clamping groove is formed in the position, at an opening of the connecting cavity, of the upper machine shell, and the upper machine shell and the lower machine shell are connected through the step-shaped clamping groove. The rectification ring and the lower machine shell are both embedded into the clamping groove. According to the utility model, the rectification ring and the connecting cover are matched to extrude and abut against the stator, so that the internal stator can be fixed without bolts, the operation of workers is convenient, errors are not easy to occur, and the installation is faster; the rectifying ring has a gasket effect between the upper casing and the lower casing, so that the stability of connection between the upper casing and the lower casing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of angle grinders, in particular to a compact high-voltage brushless angle grinder structure. Background Art

[0002] In a traditional angle grinder, the stator is first pressed into the motor housing, and then the stator is connected to the housing with screws. The rotor is pressed into the housing, and finally the air guide ring is placed into the motor housing. At this time, the process of installing the motor into the motor housing is completed, and finally, the product is inspected by workers and flows into the next process.

[0003] First of all, front-line assembly workers are prone to missing the installation of the stator pressing screws, resulting in machine rework, which is not conducive to reducing production costs.

[0004] The rotor blades of traditional angle grinders generally adopt axial flow, centrifugal or mixed blades, and the form is relatively fixed, without guiding the air outlet. Content of the Utility Model

[0005] Object of the Invention: The object of the utility model is to provide a compact high-voltage brushless angle grinder structure.

[0006] Technical Solution:

[0007] A compact high-voltage brushless angle grinder structure includes a detachable lower housing and an upper housing. A through connection cavity is provided in the upper housing, and a through installation cavity is provided in the lower housing. A rectifying ring for air diversion and a connection cover for fixing the stator are provided between the upper housing and the lower housing. A stator is snap-fitted in the installation cavity, and both ends of the connection cover are in contact with the rectifying ring and the stator respectively. A stepped card slot is provided at the opening of the connection cavity of the upper housing, and both the rectifying ring and the lower housing are embedded in the card slot.

[0008] Preferably, the stator includes an iron core, and clamping blocks are provided on the circumferential surface of the connection cover, and the clamping blocks are in contact with the iron core.

[0009] Preferably, a through connection hole is provided in the center of the rectifying ring, and a plurality of through diversion holes are arrayed on the periphery of the connection hole of the rectifying ring.

[0010] Preferably, the side wall of the diversion hole is an inclined surface.

[0011] Preferably, a through ventilation groove is provided on one side of the rectifying ring of the upper housing.

[0012] Preferably, a rotating shaft is installed in the center of the stator, the rotating shaft passes through the rectifying ring and the connection cover, a bearing is connected to the rotating shaft at the rectifying ring, an embedding groove is provided at the connection hole of the rectifying ring, and the bearing is snapped into the embedding groove.

[0013] Preferably, a pressure ring is provided on the inner wall of the connection cavity. The pressure ring abuts against the rectifying ring, and the pressure ring is snap-connected to the bearing.

[0014] Preferably, an impeller is connected between the rectifying ring and the connection cover on the rotating shaft.

[0015] Beneficial effects: Through the cooperation of the rectifying ring and the connection cover, the stator is extruded and abutted, so that the internal stator can be fixed without bolts, which is convenient for workers to operate and not easy to make mistakes, and at the same time the installation is faster; the rectifying ring plays a gasket effect between the upper housing and the lower housing, ensuring the stability of the connection between the upper housing and the lower housing; the diversion holes on the rectifying ring cooperate with the ventilation grooves of the upper housing to better promote the rotation of the impeller and improve the heat dissipation effect inside the angle grinder. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 is a sectional view of the overall structure of the present invention;

[0018] Figure 3 is a schematic diagram of the unfolded structure of the stator of the present invention;

[0019] Figure 4 is a schematic diagram of the partial sectional structure of the rectifying ring of the present invention.

[0020] Reference numerals: 11, lower housing; 111, installation cavity; 12, upper housing; 121, ventilation groove; 13, grinding head; 122, clamping groove; 123, connection cavity; 124, pressure ring; 21, rectifying ring; 211, through hole; 212, embedding groove; 213, diversion hole; 22, impeller; 23, bearing; 24, rotating shaft; 31, stator; 32, iron core; 33, connection cover; 33, clamping block. Detailed Embodiments

[0021] To make the technical solutions of the present invention clearer, the following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0022] Embodiment 1

[0023] As Figure 1 shown, a structure of a compact high-voltage brushless angle grinder includes a detachable lower housing 11 and an upper housing 12. The upper housing 12 is connected to the end of the angle grinder. A grinding head 13 is connected to the lower end of the upper housing 12. The lower housing 11 is used to install the stator 31. The upper housing 12 and the lower housing 11 are both provided with raised connecting parts at the connection. The lower housing 11 and the upper housing 12 are fixedly connected by bolts at the connecting parts.

[0024] As Figure 2 and Figure 3 shown, an installation cavity 111 is provided inside the lower housing 11. The installation cavity 111 penetrates through the lower housing 11. A fixed connecting rod is provided on the side of the installation cavity 111 away from the upper housing 12. The rotating shaft 24 of the rotor is installed on the connecting rod. The rotating shaft 24 extends out of the installation cavity 111 on the side facing the upper housing 12. A stator 31 is provided on the circumferential side of the rotating shaft 24 in the installation cavity 111. The stator 31 is slidably installed on the inner wall of the installation cavity 111. The stator 31 slides from the side of the installation cavity 111 close to the upper housing 12. A fixed limiting block is provided on the side of the installation cavity 111 away from the upper housing 12 for the stator 31 to prevent the stator 31 from sliding out of the installation cavity 111. The rotating shaft 24 passes through the stator 31 from the center.

[0025] A connecting cover 33 is slidably installed on the side of the installation cavity 111 close to the upper housing 12 for the stator 31. The connecting cover 33 abuts against the stator 31. The stator 31 includes an iron core 32. Several clamping blocks 34 are provided on the side of the connecting cover 33 close to the stator 31. The clamping blocks 34 correspond to the iron core 32 one by one, and grooves are left on the clamping blocks 34. The iron core 32 can be embedded into the grooves to ensure the connection stability between the connecting cover 33 and the stator 31. The stator 31 is fixed by pushing the connecting cover 33 from one side of the upper housing 12.

[0026] A sliding groove is further provided on the peripheral wall of the connecting cover 33, and the sliding groove is clamped with the inner wall of the installation cavity 111, which is convenient for the positioning and sliding of the connecting cover 33 and is not easy to rotate during operation.

[0027] The connecting cover 33 is conical and has a cavity inside. A through connecting hole is provided at the cavity. After passing through the stator, the rotating shaft 24 extends into the inside of the connecting cover 33 through the connecting hole. An impeller is connected to the rotating shaft 24 inside the connecting cover 33, which is convenient for heat dissipation work inside the installation cavity 111.

[0028] A connecting cavity 123 is provided inside the upper housing 12. The two ends of the connecting cavity 123 penetrate through, which is convenient for installation. At the same time, a clamping groove 122 is provided on the side of the connecting cavity 123 facing the lower housing 11. The clamping groove 122 is stepped. When the lower housing 12 and the upper housing 11 are connected, the lower housing 12 will be embedded into the clamping groove 122 to ensure the connection stability. A stepped groove matching with it is provided at the opening of the lower housing 12 to facilitate the insertion of the lower housing 12.

[0029] Furthermore, a rectifying ring 21 is embedded in the clamping groove 122. The rectifying ring 21 abuts against the bottom wall of the clamping groove 122. At the same time, the rectifying ring 21 abuts against both the lower housing 11 and the connecting cover 33. When the upper housing 12 and the lower housing 11 are fixedly connected by bolts, the rectifying ring 21 plays the role of a washer, and at the same time restricts the movement of the connecting cover 33, and then fixes the stator 31 through the connecting cover 33 to prevent the stator 31 from moving.

[0030] AsFigure 4 As shown, a through hole 211 is provided at the center of the rectifying coil 21. The rotating shaft 24 passes through the connecting cover 33 and extends into the through hole 211. The through hole 211 and the rotating shaft 24 are connected by a bearing 23. A stepped embedding groove 212 is provided on the inner wall of the through hole 211, and the bearing 23 is located in the embedding groove 212.

[0031] Meanwhile, a pressing ring 124 is provided in the upper housing 12. The pressing ring 124 cooperates with the rectifying coil 21. A stepped groove is also provided on the side of the pressing ring 124 facing the bearing 23, which is convenient for the bearing 23 to be embedded, ensuring the stability of the connection of the bearing 23. And a thickened protrusion is provided at the contact between the rectifying coil 21 and the pressing ring 124, which is convenient for cooperating with the pressing ring 124 to wrap the bearing 23.

[0032] The rectifying coil 21 is provided with a plurality of diversion holes 213 on the periphery of the through hole 211. The diversion holes 213 are arranged in an array, and the side walls of the diversion holes 213 are all inclined planes for convenient diversion. The upper housing 12 is provided with a through ventilation groove 121 on one side of the rectifying coil 21. External air flows through the ventilation groove 121 to the diversion holes 213. The diversion holes 213 guide the air to enter the connecting cover 33 and contact the impeller 22 through the inclined planes, achieving the corresponding heat dissipation effect.

[0033] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A structure of a compact high-voltage brushless angle grinder, comprising a lower housing (11) and an upper housing (12) which are detachably connected. A through connection cavity (123) is provided in the upper housing (12), and a through installation cavity (111) is provided in the lower housing (11), characterized in that: A rectifying ring (21) for air guiding and a connecting cover (33) for fixing the stator are provided between the upper housing (12) and the lower housing (11). A stator (31) is snap-fitted in the installation cavity (111). Two ends of the connecting cover (33) are respectively abutted against the rectifying ring (21) and the stator (31). A stepped clamping groove (122) is provided at the opening of the connecting cavity (123) of the upper housing (12). The rectifying ring (21) and the lower housing (11) are both embedded in the clamping groove (122).

2. The structure of a compact high-voltage brushless angle grinder according to claim 1, wherein: The stator (31) includes an iron core (32). Clamping blocks (34) are provided on the circumferential surface of the connecting cover (33), and the clamping blocks (34) are abutted against the iron core (32).

3. A compact high-voltage brushless angle grinder structure according to claim 1, characterized in that: A through hole (211) is provided at the center of the rectifying ring (21). A plurality of through air guiding holes (213) are arrayed on the periphery of the through hole (211) of the rectifying ring (21).

4. The structure of a compact high-voltage brushless angle grinder according to claim 3, characterized in that: The side wall of the air guiding hole (213) is an inclined surface.

5. The structure of a compact high-voltage brushless angle grinder according to claim 3, characterized in that: A through ventilation groove (121) is provided on one side of the upper housing (12) where the rectifying ring (21) is located.

6. The structure of a compact high-voltage brushless angle grinder according to claim 3, wherein: A rotating shaft (24) is installed at the center of the stator (31). The rotating shaft (24) passes through the rectifying ring (21) and the connecting cover (33). A bearing (23) is connected to the rotating shaft (24) at the rectifying ring (21). An embedding groove (212) is provided at the through hole (211) of the rectifying ring (21), and the bearing (23) is snapped into the embedding groove (212).

7. The structure of a compact high-voltage brushless angle grinder according to claim 6, characterized in that: A pressure ring (124) is provided on the inner wall of the connecting cavity (123). The pressure ring (124) is abutted against the rectifying ring (21), and the pressure ring (124) is snap-fitted with the bearing (23).

8. The structure of a compact high-voltage brushless angle grinder according to claim 6, characterized in that: An impeller (22) is connected between the rectifying ring (21) and the connecting cover (33) on the rotating shaft (24).

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