Small electric grinder for fine trimming of mold

Abstract

The utility model provides a small-sized electric grinding machine for fine trimming of a mold. The small-sized electric grinding machine comprises a shell, a motor, an output shaft and a fan, the shell comprises a cover cap, a main machine shell and an axle box which are connected from top to bottom. A plurality of air inlet groove holes are formed in the cover cap; a plurality of air outlet groove holes are formed in the side wall of the lower section of the axle box, and spiral flow guide ribs in the axial direction are arranged on the inner wall of the axle box; the outer side wall of the main case and the outer side wall of the axle box are provided with heat insulation anti-skid sleeves. The motor is mounted in the main case; the output shaft is installed in the axle box, the upper end of the output shaft is connected with the output end of the motor, and the lower end of the output shaft extends out of the axle box and is detachably provided with a grinding head through a chuck; the fan is installed in the main machine shell. The small electric grinding machine for fine trimming of the mold is reasonable in structural design, good in heat dissipation effect and high in use comfort level.

Description

Technical Field

[0001] This utility model belongs to the technical field of mold manufacturing equipment, and in particular relates to a small electric grinder for mold finishing. Background Technology

[0002] In the mold manufacturing process, mold finishing is a crucial step, typically requiring precision machining using an electric grinder. Existing small electric grinders suffer from overheating and poor heat dissipation during prolonged use, leading to shortened equipment lifespan, excessively hot grip areas, and reduced user comfort. Traditional cooling systems often employ fans directly within the casing, but this results in low cooling efficiency due to inadequate design, or complex air ducts that increase equipment size and manufacturing costs. Utility Model Content

[0003] In view of this, in order to solve the above-mentioned technical problems, this utility model proposes a small electric grinder for mold finishing with reasonable structural design, good heat dissipation effect and high user comfort.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A small electric grinder for mold finishing includes:

[0006] The housing includes a cover, a main housing, and a shaft box connected sequentially from top to bottom; the cover has multiple air inlet slots; the lower side wall of the shaft box has multiple air outlet slots, and the inner wall of the shaft box has axial spiral guide ribs above the air outlet slots; the outer side wall of the main housing and the upper outer side wall of the shaft box are both provided with heat-insulating and anti-slip sleeves.

[0007] An electric motor, which is installed inside the main unit housing;

[0008] An output shaft is rotatably mounted in the shaft box via bearings. The upper end of the output shaft is connected to the output end of the motor, and the lower end of the output shaft extends out of the shaft box and is detachably mounted with a grinding head via a chuck.

[0009] A fan, which is installed inside the main unit housing.

[0010] The air inlet slots on the cover, the gaps between the outer shell and the internal structure, and the air outlet slots on the shaft box form an airflow channel. Under the action of the fan, air enters through the air inlet slots, carries away heat from the motor surface, and continues to flow downwards into the shaft box. It forms a swirling flow through the spiral guide ribs and finally exits through the air outlet slots. The spiral guide ribs can increase the airflow speed, thereby improving heat dissipation efficiency and optimizing the heat dissipation effect. The design of the heat-insulating and anti-slip sleeve can prevent operators from directly contacting the outer shell surface, improving anti-slip performance while also providing heat insulation, effectively improving operating comfort.

[0011] Furthermore, the air intake slot is an elongated opening formed along the axial direction; multiple air intake slots are distributed at equal intervals along the circumference.

[0012] Furthermore, the axle box is a conical structure with a diameter that gradually decreases from top to bottom; the air outlet slot is an elongated opening opened along the generatrix of the conical structure; and multiple air outlet slots are evenly distributed along the circumference of the conical surface.

[0013] The axle box features a conical structure, which increases gas flow rate, thus removing more heat in the same amount of time. It also makes it easier for the user to grip.

[0014] Furthermore, a baffle ring is provided circumferentially above the air outlet slot on the outer wall of the axle box.

[0015] The baffle ring prevents the exhaust gas from flowing upwards, thus avoiding direct airflow onto the user's hand; it also provides support for the user's fingers, preventing them from sliding downwards and accidentally touching the lower air outlet when holding the device for extended periods.

[0016] Furthermore, the baffle ring includes an annular plate and an anti-slip ring sleeve disposed on the upper surface of the annular plate along the circumference. The vertical cross-section of the anti-slip ring sleeve is a triangular shape, wherein the upward-facing side is an arc-shaped side with the concave surface facing inward.

[0017] Anti-slip rings can be made of silicone material with a certain degree of elasticity to improve user comfort.

[0018] Furthermore, the spiral guide rib has a rib height of 2mm and a pitch of 20mm.

[0019] Furthermore, multiple air vents are provided at equal intervals around the output shaft through hole on the bottom end face of the axle box.

[0020] Airflow can flow out from both the air outlet slot and the air outlet simultaneously.

[0021] Furthermore, the bottom of the axle box is provided with a guide shell coaxially arranged therewith, and the axis of the guide shell is provided with a channel for the output shaft to pass through. The output shaft is rotatably connected to the inner wall of the guide shell through a bearing.

[0022] The guide housing is designed to stabilize the output shaft.

[0023] Furthermore, the motor is fixed inside the main housing via a connecting bracket.

[0024] Furthermore, the fan is coaxially mounted on the output end of the motor.

[0025] Compared with the prior art, the small electric grinder for mold finishing described in this utility model has the following advantages:

[0026] (1) The small electric grinder for mold finishing described in this utility model has a reasonable structural design. The air inlet slot, the gap between the outer shell and the internal structure, and the air outlet slot form an airflow channel. Combined with the unique design of the spiral guide rib, it can effectively improve the airflow speed, thereby improving the heat dissipation efficiency and optimizing the heat dissipation effect. The heat insulation and anti-slip sleeve can prevent the operator from directly contacting the outer shell surface, improve the anti-slip performance and play a role in heat insulation, effectively improving the operating comfort.

[0027] (2) The axle box of this utility model adopts a conical structure that gradually decreases in size from top to bottom, and with the spiral guide ribs set inside it, the gas flow speed is further improved and the heat dissipation efficiency is improved.

[0028] (3) The baffle ring described in this utility model serves to block the upward flow of the discharged gas, preventing the gas from blowing directly onto the user's hand; at the same time, it can provide support for the user's fingers, preventing the fingers from sliding downwards and accidentally touching the lower gas outlet when holding the device for a long time. Attached Figure Description

[0029] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0030] Figure 1 This is a schematic diagram of the internal structure of the small electric grinder for mold finishing described in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the external structure of the small electric grinder for mold finishing described in an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Motor, 2-Output shaft, 3-Fan, 4-Cover, 5-Main housing, 6-Shaft box, 7-Inlet slot, 8-Heat insulation and anti-slip sleeve, 9-Outlet slot, 10-Baffle ring, 11-Annular plate, 12-Anti-slip ring sleeve, 13-Spiral guide rib, 14-Outlet, 15-Guide shell, 16-Connecting bracket, 17-Bearing. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] like Figure 1 and 2 As shown, a small electric grinder for mold finishing includes a housing, a motor 1, an output shaft 2, and a fan 3;

[0039] The outer casing includes, from top to bottom, a cover 4, a main housing 5, and a shaft box 6;

[0040] The cover 4 is provided with multiple air inlet slots 7 that are evenly distributed along the circumference. The air inlet slots 7 are elongated openings that are opened along the axial direction.

[0041] The main unit casing 5 is a cylindrical casing structure, and the outer wall is covered with a heat-insulating and anti-slip sleeve 8;

[0042] The axle box 6 is a conical structure with a diameter that gradually decreases from top to bottom. Multiple venting slots 9 are provided on the lower side wall of the axle box 6. Each venting slot 9 is a long, narrow opening along the generatrix of the conical structure, and the multiple venting slots 9 are evenly spaced along the circumference of the conical surface. A baffle ring 10 is provided circumferentially above the venting slots 9 on the outer side wall of the axle box 6. The baffle ring 10 includes an annular plate 11 and an anti-slip ring sleeve 12 disposed circumferentially on the upper surface of the annular plate 11. The vertical cross-section of the anti-slip ring sleeve 12 is approximately triangular, with one upward-facing side being... The concave side faces inward; the outer wall of the axle box 6 is covered with a heat-insulating anti-slip sleeve 8 at the part where the anti-slip ring sleeve 12 is placed; the inner wall of the axle box 6 is provided with an axial spiral guide rib 13 above the air outlet slot 9, the rib height of the spiral guide rib 13 is 2mm and the pitch is 20mm; multiple air outlet holes 14 are provided at equal intervals around the outer side of the output shaft through hole at the center on the bottom end face of the axle box 6; a guide shell 15 is provided at the bottom of the axle box 6 and is coaxial with it, and a channel for the output shaft to pass through is provided at the axis of the guide shell 15;

[0043] The motor 1 is fixed inside the main housing 5 by the connecting bracket 16. The rotating parts at both ends of the motor 1 are equipped with bearings 17. The connecting bracket 16 and the bearings 17 are not sealed to the inner wall of the main housing 5, but are fixedly connected by a support rod so that the airflow can pass through smoothly.

[0044] Output shaft 2 is installed inside shaft box 6; the upper end of output shaft 2 is connected to the output end of motor 1; the bottom end of output shaft 2 passes through output shaft through hole, extends through guide shell 15, and after extending out, a grinding head is detachably installed through chuck; the upper end of output shaft 2 is rotatably connected to the inner wall of shaft box 6 through bearing 17, and the lower end of output shaft 2 is rotatably connected to the inner wall of guide shell 15 through bearing 17.

[0045] Fan 3 is installed inside the main unit housing 5 and is coaxially mounted with motor 1.

[0046] The working process of the small electric grinder for mold finishing described in this utility model is as follows:

[0047] When in use, after the power is turned on, the motor 1 starts and drives the output shaft 2 to rotate, thereby driving the grinding head to grind the mold; the user holds the heat-insulating and anti-slip sleeve 8 on the outside of the main housing 5 and the shaft box 6, with their fingers resting on the baffle ring 10; under the action of the fan 3, air enters through the air inlet slot 7, carries away the heat through the surface of the motor 1, continues to flow downward into the shaft box 6, forms a swirling flow through the spiral guide rib 13, and finally flows out from the air outlet slot 9 and the air outlet 14.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A small electric grinder for precision mold finishing, characterized in that, include: The housing includes a cover, a main housing, and a shaft box connected sequentially from top to bottom; the cover has multiple air inlet slots; the lower side wall of the shaft box has multiple air outlet slots, and the inner wall of the shaft box has axial spiral guide ribs above the air outlet slots; the outer side wall of the main housing and the upper outer side wall of the shaft box are both provided with heat-insulating and anti-slip sleeves. An electric motor, which is installed inside the main unit housing; An output shaft is rotatably mounted in the shaft box via bearings. The upper end of the output shaft is connected to the output end of the motor, and the lower end of the output shaft extends out of the shaft box and is detachably mounted with a grinding head via a chuck. A fan, which is installed inside the main unit housing.

2. The small electric grinder for mold finishing according to claim 1, characterized by: The air intake slot is an elongated opening opened along the axial direction; multiple air intake slots are distributed at equal intervals along the circumference.

3. The small electric grinder for mold finishing according to claim 1, characterized by: The axle box is a conical structure with a diameter that gradually decreases from top to bottom; the air outlet slot is an elongated opening opened along the generatrix of the conical structure; and multiple air outlet slots are evenly distributed along the circumference of the conical surface.

4. The small electric grinder for mold finishing according to claim 3, characterized in that: The outer wall of the axle box is provided with a baffle ring along the circumference above the air outlet slot.

5. The small electric grinder for mold finishing according to claim 4, characterized in that: The baffle ring includes an annular plate and an anti-slip ring sleeve disposed on the upper surface of the annular plate along the circumference. The vertical cross-section of the anti-slip ring sleeve is a triangular shape, wherein the upward-facing side is an arc-shaped side with the concave surface facing inward.

6. The small electric grinder for mold finishing according to claim 1, characterized by: The spiral guide rib has a rib height of 2mm and a pitch of 20mm.

7. The small electric grinder for mold finishing according to claim 1, characterized by: Multiple air vents are evenly spaced around the through hole of the output shaft on the bottom end face of the shaft box.

8. A small electric grinder for mold finishing according to claim 7, characterized in that: The bottom of the axle box is provided with a guide shell coaxially arranged therewith. The guide shell has a channel at its axis for the output shaft to pass through. The output shaft is rotatably connected to the inner wall of the guide shell through a bearing.

9. The small electric grinder for mold finishing according to claim 1, characterized by: The motor is fixed inside the main unit housing by a connecting bracket.

10. The small electric grinder for mold finishing according to claim 1, characterized by: The fan is coaxially mounted on the output end of the motor.

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