Dry mill with ventilation and heat dissipation design

Abstract

A dry mill with ventilation and heat dissipation design comprises a machine shell with an opening in one end, a motor arranged in the machine shell and an eccentric block connected with a driving shaft of the motor, the motor is connected into the machine shell through bolts, a gap is formed between the outer wall of the motor and the inner wall of the machine shell, and a fan blade rotating disc is arranged on the outer side of the eccentric block. An air inlet and an air outlet are formed in the machine shell, the air inlet is located in the end, away from the eccentric block, of the motor, and the air outlet is located on the outer side of the fan blade rotating disc. Compared with the prior art, the dry mill has the advantages that the gap is formed between the motor and the machine shell, negative pressure in the cavity is formed through airflow generated when the fan blade rotating disc rotates, air circulation is accelerated, external air flows into the motor through the air inlet, heat on the motor and components in the dry mill is discharged from the air outlet, and the heat dissipation efficiency of the dry mill is improved. And the heat dissipation efficiency is obviously improved, so that the working temperature of the motor and internal components is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dry grinders, in particular to a dry grinder with ventilation and heat dissipation design. Background Art

[0002] A dry grinder is an electric tool that can effectively reduce the intensity of manual labor. Its main function is to grind or polish the surface of the material through a high-speed rotating polishing disc.

[0003] Compared with large dry grinders, handheld dry grinders are smaller in size and more compact in structure. The advantage is that they are easy for operators to carry and perform dry grinding operations in a limited space. However, as the intensity and duration of work increase, the motor and internal components of the dry grinder will generate a lot of heat energy due to friction and power conversion efficiency issues. Traditional heat dissipation methods mostly use natural cooling, which has a low heat dissipation rate and affects work efficiency. Motor overheating will not only shorten the life of the equipment, but may also cause safety hazards. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and provide a dry grinder with a ventilation and heat dissipation design capable of effectively dissipating heat from a motor.

[0005] The utility model solves the technical problem by adopting a technical solution: the dry grinder with ventilation and heat dissipation design comprises: a casing with an open end, a motor arranged in the casing, and an eccentric block connected to the driving shaft of the motor, the motor is connected to the casing by bolts, and there is a gap between the outer wall of the motor and the inner wall of the casing, a fan blade rotating disk is arranged on the outer side of the eccentric block, an air inlet and an air outlet are opened on the casing, the air inlet is located on the end of the motor away from the eccentric block, and the air outlet is located on the outer side of the fan blade rotating disk;

[0006] An output shaft is arranged at the lower end of the eccentric block, a polishing disc is connected to the output shaft, and an upper end plane of the polishing disc is attached to the opening of the housing to form a chamber;

[0007] When the motor drives the fan disc to rotate through the eccentric block, the air pressure inside the chamber is lower than the air pressure outside the casing, so that the air outside the casing is sucked into the chamber through the air inlet and flows into the motor, and the heat generated by the motor is discharged from the air outlet through the gap.

[0008] Preferably, a plurality of limit bars are arranged on the inner wall of the housing, the limit bars are arranged along the length direction of the motor, a plurality of the limit bars abut against the outer wall of the motor, and the gap is formed between adjacent limit bars.

[0009] Preferably, the motor comprises a shell, a stator fixed to the inner wall of the shell, a rotor rotatably arranged in the stator, and end covers which are open at the upper and lower ends of the shell and are provided with end covers for mounting the rotor, a plurality of fins are provided on the outer wall of the shell, the plurality of fins are evenly distributed and surround the shell, the outer wall of the end cover abuts against the limit strip, a through hole is opened on the end cover along the length direction of the shell, and the air inlet and the air outlet are connected to the through hole.

[0010] Preferably, the eccentric block comprises a first eccentric portion and a second eccentric portion integrally formed with the first eccentric portion, the first eccentric portion is located above the second eccentric portion, and a first limiting surface is provided on the lower end of the side of the first eccentric portion away from the second eccentric portion, and a second limiting surface is provided on the upper end of the side of the second eccentric portion away from the first eccentric portion, and a limiting through slot is provided on the fan blade rotating disk, and a stop top and a pair of first buckles are provided on the slot wall of the limiting through slot, and the pair of first buckles are symmetrically arranged along the stop top;

[0011] When the eccentric block is connected to the fan blade rotating disk, the first limiting surface abuts against the abutting top portion, and a pair of the first buckles are clamped with the second limiting surface.

[0012] Preferably, the right side of the casing has a grip portion and a storage portion integrally formed with the grip portion, the storage portion is used to place a control module for controlling the rotation of the motor, and grooves are provided on both sides of the storage portion, and the air inlet is provided on the bottom wall of the groove.

[0013] Preferably, a detachable decorative panel is provided on the groove, the decorative panel is located on the outer side of the air outlet, and the inner side of the decorative panel has a second buckle, and the second buckle extends into the air inlet and is engaged with the inner side of the storage part.

[0014] Preferably, the air inlet has a plurality of obliquely arranged first guide grooves, and a plurality of blocks are correspondingly arranged on the decorative plate, the blocks are located outside the first guide grooves and keep a certain distance from the bottom wall of the groove, and second guide grooves are provided between adjacent blocks, and the first guide grooves are connected with the second guide grooves.

[0015] Preferably, the right side of the casing has a dry grinding assembly part, and an assembly chamber with a ring-shaped structure is provided at the end of the dry grinding assembly part away from the motor. The air outlet is opened on the assembly chamber, and the fan blade position turntable is located on the inner side of the assembly chamber.

[0016] Preferably, a dust ring is rotatably connected to the open portion of the housing, and the dust ring is in contact with the upper end plane of the polishing disc.

[0017] Preferably, an air suction hole is provided on the polishing disc, and a dust removal port connected to the air suction hole is provided on the housing, the dust removal port is located between the dustproof ring and the assembly chamber, and the dust removal port can be connected to an external dust collection device.

[0018] The beneficial effects of the utility model are as follows: by setting a gap between the motor and the casing and utilizing the airflow generated when the fan disc rotates, a negative pressure is formed in the chamber, air circulation is accelerated, and external air flows into the motor through the air inlet, and the heat on the motor and the internal components of the dry grinder is discharged from the exhaust port, which significantly improves the heat dissipation efficiency, thereby effectively reducing the operating temperature of the motor and the internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the dry grinding machine;

[0020] Figure 2 This is a structural sectional view of the dry mill;

[0021] Figure 3 It is a schematic diagram of the structure of the casing;

[0022] Figure 4 It is a structural diagram of the motor, eccentric block and fan blade turntable;

[0023] Figure 5 It is a structural schematic diagram of the eccentric block and the fan blade turntable.

[0024] Description of reference numerals:

[0025] 1. Casing; 10. Grip; 11. Storage; 12. Dry grinding assembly; 100. Air inlet; 101. Air outlet; 102. Gap; 103. Limiting strip; 104. Groove; 105. Decorative plate; 106. Second buckle; 107. First guide slot; 108. Stopper; 109. Second guide slot; 110. Assembly chamber; 111. Dustproof ring; 112. Air intake hole; 113. Dust removal port;

[0026] 2. Motor; 200. Housing; 201. Stator; 202. Rotor; 203. End cover; 204. Through hole;

[0027] 3. eccentric block; 30. fan blade rotating disk; 300. first eccentric part; 301. second eccentric part; 302. first limiting surface; 303. second limiting surface; 304. limiting through groove; 305. abutting top; 306. first buckle;

[0028] 4. Polishing disc;

[0029] 5. Chamber. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings:

[0031] See attached Figures 1 to 5 The dry mill with ventilation and heat dissipation design comprises: a casing 1 with an open end, a motor 2 arranged in the casing 1, and an eccentric block 3 connected to the driving shaft of the motor 2, the motor 2 is connected to the casing 1 by bolts, and there is a gap 102 between the outer wall of the motor 2 and the inner wall of the casing 1, a fan blade rotating disk 30 is arranged on the outer side of the eccentric block 3, and an air inlet 100 and an air outlet 101 are opened on the casing 1, the air inlet 100 is located at the end of the motor 2 away from the eccentric block 3, and the air outlet 101 is located at the fan blade rotating disk 30. The outer side of the disk 30; an output shaft is provided at the lower end of the eccentric block 3, and a polishing disk 4 is connected to the output shaft, and the upper end plane of the polishing disk 4 is in contact with the opening of the casing 1 to form a chamber 5; when the motor 2 drives the fan turntable 30 to rotate through the eccentric block 3, the air pressure inside the chamber 5 is lower than the air pressure outside the casing 1, so that the air outside the casing 1 is sucked into the chamber 5 through the air inlet 100, and flows into the motor 2, and the heat generated by the motor 2 is discharged from the air outlet 101 through the gap 102.

[0032] The dry mill with ventilation and heat dissipation design mainly includes a housing 1 with an open end, a motor 2 is arranged inside the housing 1, and the motor 2 is fixed in the housing 1 along the height direction of the housing by bolts, and a certain gap 102 is left between the outer wall of the motor 2 and the inner wall of the housing 1 for air circulation. The housing 1 is designed with an air inlet 100 and an air outlet 101, the air inlet 100 is located at the end of the motor 2 away from the eccentric block 3, and the air outlet 101 is located on the outside of the fan blade rotating disk 30. The driving shaft of the motor 2 is connected to the eccentric block 3, and the fan blade rotating disk 30 is installed on the outside of the eccentric block 3. The rotation of the fan blade rotating disk 30 can promote air flow to achieve heat dissipation. When the motor 2 drives the fan blade rotating disk 30 to rotate through the eccentric block 3, a low-pressure area will be generated in the chamber 5, prompting the external air to enter through the air inlet 100, pass through the gap 102 around the motor 2, take away the heat generated by the motor 2, and finally discharge from the air outlet 101.

[0033] Preferably, if Figure 2 and Figure 3 As shown, a plurality of limit bars 103 are arranged on the inner wall of the housing 1 , and the limit bars 103 are arranged along the length direction of the motor 2 . The plurality of limit bars 103 abut against the outer wall of the motor 2 , and gaps 102 are formed between adjacent limit bars 103 .

[0034] A plurality of limit bars 103 are provided on the inner wall of the casing 1. These limit bars 103 are arranged along the length direction of the motor 2 and are in contact with the outer wall of the motor 2. The gaps 102 formed between adjacent limit bars 103 facilitate the free circulation of air. At the same time, the limit bars 103 support and position the motor 2, thereby ensuring the stability of the motor 2 during operation.

[0035] Furthermore, if Figure 1 and Figure 4 As shown, the motor 2 includes a housing 200, a stator 201 fixed to the inner wall of the housing 200, a rotor 202 rotatably arranged in the stator 201, and end covers 203 which are open at the upper and lower ends of the housing 200 and are provided with end covers for mounting the rotor 202. A plurality of fins are provided on the outer wall of the housing 200, and the plurality of fins are evenly distributed and surround the housing 200. The outer wall of the end cover 203 abuts against the limit strip 103. A through hole 204 is opened on the end cover 203 along the length direction of the housing 200, and the air inlet 100 and the air outlet 101 are connected to the through hole 204.

[0036] The motor 2 is composed of a shell 200, a stator 201, a rotor 202 and an end cover 203. A plurality of fins are evenly distributed on the outer wall of the shell 200. These fins increase the surface area of ​​the shell 200 and are conducive to the rapid dissipation of heat. The end cover 203 is provided with a through hole 204, which is connected to the air inlet 100 and the air outlet 101 on the casing 1 to ensure that air can flow in and out smoothly and take away the heat generated when the motor 2 is running.

[0037] Furthermore, if Figures 2 to 5 As shown, the eccentric block 3 has a first eccentric portion 300 and a second eccentric portion 301 integrally formed with the first eccentric portion 300, the first eccentric portion 300 is located above the second eccentric portion 301, and a first limiting surface 302 is provided on the lower end of the side of the first eccentric portion 300 away from the second eccentric portion 301, and a second limiting surface 303 is provided on the upper end of the side of the second eccentric portion 301 away from the first eccentric portion 300, and a limiting through groove 304 is provided on the fan blade turntable 30, and a top portion 305 and a pair of first buckles 306 are provided on the groove wall of the limiting through groove 304, and the pair of first buckles 306 are symmetrically arranged along the top portion 305; when the eccentric block 3 is connected to the fan blade turntable 30, the first limiting surface 302 abuts against the top portion 305, and the pair of first buckles 306 are engaged with the second limiting surface 303.

[0038] The eccentric block 3 includes a first eccentric portion 300 and a second eccentric portion 301, and the two parts are integrally formed. The first eccentric portion 300 is provided with a first limiting surface 302, and the second eccentric portion 301 is provided with a second limiting surface 303. There is a corresponding limiting through groove 304 on the fan blade turntable 30, and a stop top 305 and a pair of first buckles 306 are designed on the groove wall. When the eccentric block 3 is assembled with the fan blade turntable 30, the first limiting surface 302 contacts the stop top 305, and the first buckle 306 is engaged with the second limiting surface 303 to ensure that the two are firmly connected and accurately positioned.

[0039] Preferably, if Figures 1 to 3As shown, the right side of the housing 1 has a grip portion 10 and a storage portion 11 integrally formed with the grip portion 10 , the storage portion 11 is used to place a control module for controlling the rotation of the motor 2 , and grooves 104 are provided on both sides of the storage portion 11 , and an air inlet 100 is provided on the bottom wall of the groove 104 .

[0040] The right side of the casing 1 integrates a gripping portion 10 and a storage portion 11. The gripping portion 10 is convenient for users to hold and operate, and the storage portion 11 is used to store a control module that controls the operation of the motor 2. At the same time, the bottom walls of the grooves 104 on both sides of the storage portion 11 are provided with the above-mentioned air inlets 100, which is convenient for manually holding the dry grinder without blocking the air inlets.

[0041] Furthermore, if Figure 1 and Figure 3 As shown, a detachable decorative plate 105 is provided on the groove 104 , and the decorative plate 105 is located on the outer side of the air outlet 101 . A second buckle 106 is provided on the inner side of the decorative plate 105 , and the second buckle 106 extends into the air inlet 100 and is engaged with the inner side of the storage portion 11 .

[0042] The removable decorative plate 105 on the groove 104 covers the air outlet 101, and the second buckle 106 inside the decorative plate 105 is snapped with the inner side of the storage part 11 to prevent external debris from entering the housing 1 from the air inlet and causing damage to the motor 2 and other components.

[0043] Furthermore, if Figure 1 and Figure 3 As shown, the air inlet 100 has a plurality of obliquely arranged first guide grooves 107, and a plurality of blocks 108 are correspondingly arranged on the decorative panel 105. The blocks 108 are located outside the first guide grooves 107 and keep a certain distance from the bottom wall of the groove 104. Second guide grooves 109 are provided between adjacent blocks 108, and the first guide grooves 107 are connected to the second guide grooves 109.

[0044] The air inlet 100 of the dry grinder includes a plurality of first guide slots 107 arranged obliquely. The oblique arrangement of the first guide slots 107 can guide the airflow to flow in a specific direction, reduce the resistance when the air enters, and improve the heat dissipation efficiency. In addition, a plurality of blocks 108 are correspondingly arranged on the decorative plate 105. These blocks 108 are located outside the first guide slots 107 and maintain a certain distance from the bottom wall of the groove 104. Such a design can prevent foreign matter from directly entering the machine without hindering the air flow. Second guide slots 109 are arranged between adjacent blocks 108, which are connected to the first guide slots 107 to form a continuous air guide system, ensuring that the air can smoothly enter from the air inlet 100, pass around the motor 2, and then be discharged from the air outlet 101 to complete the entire heat dissipation process.

[0045] Furthermore, if Figure 1 and Figure 3 As shown, the right side of the casing 1 has a dry grinding assembly part 12, and an annular assembly chamber 110 is provided at the end of the dry grinding assembly part 12 away from the motor 2. The air outlet 101 is opened on the assembly chamber 110, and the fan blade position turntable is on the inner side of the assembly chamber 110.

[0046] The right side of the housing 1 is designed with a dry grinding assembly part 12 for placing the motor and other driving components. At the end of the dry grinding assembly part 12 away from the grip part 10, an annular assembly chamber 110 is provided. The assembly chamber 110 not only provides an installation space for dry grinding tools, but also cleverly integrates the air outlet 101. The air outlet 101 is opened on the assembly chamber 110, which means that when the fan blade turntable 30 rotates, it is located on the inner side of the assembly chamber 110, and the generated airflow can be directly discharged through the air outlet 101. This design not only simplifies the airflow path and improves the heat dissipation efficiency, but also ensures that the airflow is unobstructed during dry grinding operations, reducing the risk of internal heat accumulation.

[0047] Furthermore, if Figure 1 As shown, a dust ring 111 is rotatably connected to the open portion of the housing 1 , and the dust ring 111 is in contact with the upper surface of the polishing disc 4 .

[0048] A dust ring 111 is rotatably connected to the open portion of the casing 1. The dust ring 111 fits tightly against the upper plane of the polishing disk 4 to form an effective sealing barrier, which remains stable when the polishing disk 4 rotates. At the same time, due to the tight fit with the polishing disk 4, it can effectively prevent dust and debris from entering the interior of the casing 1, protecting the internal components from contamination and wear.

[0049] The polishing disc 4 is provided with an air suction hole 112 , and the housing 1 is provided with a dust removal port 113 connected with the air suction hole 112 . The dust removal port 113 is located between the dustproof ring 111 and the assembly chamber 110 , and the dust removal port 113 can be connected to an external dust collection device.

[0050] When in use, the dust removal port 113 is connected to an external dust suction device. After the dust suction device is turned on, during the polishing process of the polishing disc 4, dust can enter the assembly chamber through the suction hole 112 and finally be sucked into the dust suction device from the dust removal port 113, thereby preventing the dust generated during the polishing process from floating everywhere. It is worth mentioning that when the vacuum cleaner is turned on, part of the heat on the motor can be sucked away by the external vacuum cleaner from the dust removal port, thereby improving the heat dissipation efficiency.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] Certain words are used in the specification and claims of this utility model to refer to specific products. It should be understood by those with ordinary knowledge in the art that manufacturers may refer to the same components by different names. This document does not intend to distinguish between components that have the same function but different names. In the following specification and patent scope, the words "comprise", "have" and "include" are open-ended words and should be interpreted as "including but not limited to...".

[0053] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A dry mill with ventilation and heat dissipation design, comprising a casing with an open end, a motor disposed in the casing, and an eccentric block connected to a drive shaft of the motor, wherein: The motor is connected to the casing by bolts, and there is a gap between the outer wall of the motor and the inner wall of the casing, a fan blade rotating disk is arranged on the outer side of the eccentric block, and an air inlet and an air outlet are opened on the casing, the air inlet is located at the end of the motor away from the eccentric block, and the air outlet is located on the outer side of the fan blade rotating disk; An output shaft is arranged at the lower end of the eccentric block, a polishing disc is connected to the output shaft, and an upper end plane of the polishing disc is attached to the opening of the housing to form a chamber; When the motor drives the fan disc to rotate through the eccentric block, the air pressure inside the chamber is lower than the air pressure outside the casing, so that the air outside the casing is sucked into the chamber through the air inlet and flows into the motor, and the heat generated by the motor is discharged from the air outlet through the gap.

2. The dry grinding machine with ventilation and heat dissipation design according to claim 1 is characterized in that: A plurality of limit bars are arranged on the inner wall of the housing, and the limit bars are arranged along the length direction of the motor. A plurality of the limit bars abut against the outer wall of the motor, and the gap is formed between adjacent limit bars.

3. The dry grinding machine with ventilation and heat dissipation design according to claim 2 is characterized in that: The motor comprises a shell, a stator fixed to the inner wall of the shell, a rotor rotatably arranged in the stator, and end covers which are open at the upper and lower ends of the shell and are provided with end covers for mounting the rotor. A plurality of fins are provided on the outer wall of the shell, and the fins are evenly distributed and surround the shell. The outer wall of the end cover abuts against the limit strip. A through hole is opened on the end cover along the length direction of the shell, and the air inlet and the air outlet are connected to the through hole.

4. The dry grinding machine with ventilation and heat dissipation design according to claim 3 is characterized in that: The eccentric block comprises a first eccentric portion and a second eccentric portion integrally formed with the first eccentric portion, the first eccentric portion is located above the second eccentric portion, and a first limiting surface is provided on the lower end of the side of the first eccentric portion away from the second eccentric portion, and a second limiting surface is provided on the upper end of the side of the second eccentric portion away from the first eccentric portion, the fan blade rotating disk is provided with a limiting through slot, a groove wall of the limiting through slot is provided with an abutting top portion and a pair of first buckles, and the pair of first buckles are symmetrically arranged along the abutting top portion; When the eccentric block is connected to the fan blade rotating disk, the first limiting surface abuts against the abutting top portion, and a pair of the first buckles are clamped with the second limiting surface.

5. The dry grinding machine with ventilation and heat dissipation design according to claim 1 is characterized in that: The right side of the housing has a grip portion and a storage portion integrally formed with the grip portion, the storage portion is used to place a control module for controlling the rotation of the motor, and grooves are provided on both sides of the storage portion, and the air inlet is provided on the bottom wall of the groove.

6. The dry grinding machine with ventilation and heat dissipation design according to claim 5 is characterized in that: A detachable decorative panel is provided on the groove, and the decorative panel is located on the outer side of the air outlet. The inner side of the decorative panel has a second buckle, and the second buckle extends into the air inlet and is engaged with the inner side of the storage part.

7. The dry grinding machine with ventilation and heat dissipation design according to claim 6 is characterized in that: The air inlet has a plurality of obliquely arranged first guide grooves, and a plurality of blocks are correspondingly arranged on the decorative panel. The blocks are located outside the first guide grooves and keep a certain distance from the bottom wall of the groove. Second guide grooves are arranged between adjacent blocks, and the first guide grooves are connected to the second guide grooves.

8. The dry grinding machine with ventilation and heat dissipation design according to claim 6 is characterized in that: The right side of the housing is provided with a dry grinding assembly part, and an assembly chamber with a ring structure is arranged at the end of the dry grinding assembly part away from the motor. The air outlet is opened on the assembly chamber, and the fan blade position turntable is located on the inner side of the assembly chamber.

9. The dry grinding machine with ventilation and heat dissipation design according to claim 8 is characterized in that: A dustproof ring is rotatably connected to the open portion of the housing, and the dustproof ring is in contact with the upper end plane of the polishing disc.

10. The dry grinding machine with ventilation and heat dissipation design according to claim 9 is characterized in that: The polishing disc is provided with an air suction hole, the housing is provided with a dust removal port connected with the air suction hole, the dust removal port is located between the dustproof ring and the assembly chamber, and the dust removal port can be connected with an external dust collection device.

Images