Heat dissipation and flow guide assembly of grinding machine

Abstract

The utility model relates to a heat dissipation flow guide assembly of a grinding machine, which comprises a grinding machine, a heat dissipation flow guide assembly and a heat dissipation flow guide assembly, the balance weight body is integrally formed and provided with a shaft column, a first balance weight part, a second balance weight part, a third balance weight part and a plurality of radiating fins, the area of the third balance weight part is larger than that of the second balance weight part, a fall part is formed between the second balance weight part and the third balance weight part, and the radiating fins are formed on the fall part at equal intervals. When the driving shaft operates, the counterweight body can be cooled and radiated through the radiating fins, so that the problem that the motor and the driving shaft generate high heat due to load operation can be solved, and noise and shaking during operation can be avoided by utilizing the gapless design of the integrally-formed radiating fins, so that the service life of the motor and the driving shaft can be prolonged, and the service life of the motor and the driving shaft can be prolonged. And the use safety of the grinding machine is further improved.

Description

Technical Field

[0001] The utility model relates to a grinding machine, in particular to a heat dissipation and flow guiding component of the grinding machine. Background Art

[0002] Common machine tools currently used in the industry, such as grinders, all have a main body, within which is housed a motor and a tool shaft driven by the motor. The tool shaft is provided with a counterweight to cause eccentric rotation of the tool shaft, and an actuating member is connected to the counterweight. Therefore, when the motor is activated, it drives the tool shaft to rotate eccentrically, and the actuating member is driven to rotate via the counterweight, thereby machining a workpiece. However, when these machine tools are in operation, the load easily causes the motor to accumulate heat, causing the motor to overheat, affecting the machine tool's ability to operate for extended periods of time and, in turn, affecting the machine tool's durability.

[0003] Therefore, in order to improve the overheating problem of the above-mentioned machine tool, there is another related improvement technology. A heat sink is arranged around the counterweight block, and the heat sink has a sleeve portion and a plurality of fan blades formed on the outer periphery of the sleeve portion. The heat sink is assembled around the counterweight block through the sleeve portion. Accordingly, when the counterweight block is driven by the tool shaft to rotate and conduct high temperature, the heat energy can be discharged through the fan blades of the heat sink, thereby achieving the purpose of cooling and heat dissipation, while improving the smoothness of the operation of the machine tool.

[0004] A detailed look at the above-mentioned existing structure reveals that it still has some shortcomings. The main reasons are summarized as follows: Since the existing counterweight block is assembled with the heat sink, a gap is easily generated between the heat sink and the counterweight block due to factors such as temperature changes and dimensional errors. The gap not only causes the counterweight block to generate noise during rotation, but may even cause the heat sink to shake and detach from the counterweight block due to centrifugal force. This obviously raises safety concerns and still needs to be improved.

[0005] In view of this, the applicant has many years of experience in manufacturing, developing and designing related products. Aiming at the above-mentioned goals, after detailed design and careful evaluation, he finally obtained the present utility model which is truly practical. Utility Model Content

[0006] The technical problem that the present invention aims to solve is to provide a heat dissipation and air flow guide assembly for a grinding machine that is easy to assemble, reduces noise, and improves safety in use, in response to the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, the heat dissipation and air flow guide assembly of the grinding machine of the present invention includes: a grinding machine, a driving shaft protruding from the bottom of the grinding machine, and an annular cover body is provided with the driving shaft as the center; a counterweight body is integrally formed with a shaft column, a first counterweight part, a second counterweight part, a third counterweight part and a plurality of heat dissipation fins, the shaft column is provided with a connecting screw hole at the axial center position to be assembled with the driving shaft, the first counterweight part is formed on one side of the shaft column, the second counterweight part and the third counterweight part are arc-shaped and overlapped on the other side of the shaft column, the second counterweight part is stacked above the third counterweight part, and the area of ​​the third counterweight part is larger than that of the second counterweight part, and a step portion is formed between the second counterweight part and the third counterweight part, the heat dissipation fins are formed equidistantly at the step portion along the outer wall of the second counterweight part, and a connecting shaft is provided at the bottom of the counterweight body for assembling a grinding accessory.

[0008] Optionally, the bottom end edge of the grinder is provided with a plurality of guide inlets, and a motor box is extended from the side of the grinder. The motor box is used to accommodate a driving motor, and the motor box is provided with a plurality of guide outlets through the box wall.

[0009] Optionally, the area of ​​the third counterweight part of the counterweight body is larger than that of the first counterweight part, and the height of the first counterweight part exceeds that of the second counterweight part and the third counterweight part, so that the connecting screw hole is biased toward the first counterweight part. When the counterweight body is connected to the drive shaft and rotated, it can generate an eccentric rotation stroke relative to the grinder.

[0010] Optionally, a combination space is hollowed out at the bottom of the counterweight body relative to the first counterweight part, and the combination space accommodates two bearings. The center of the bearing is non-concentrically arranged with the connecting screw hole and is assembled with the connecting shaft. The connecting shaft is provided with an axial hole, and the grinding accessory is provided with a center screw assembled with the axial hole.

[0011] Optionally, a counterweight recess is provided at the bottom end of the counterweight body between the third counterweight portion and the combination space, and a counterweight block is provided in conjunction with the counterweight recess. The counterweight block has a variety of weights for selection according to the volume size of the grinding accessory.

[0012] Optionally, the counterweight recess is provided with at least two screw holes, the counterweight block is provided with at least two through holes aligned and communicating with the two screw holes, and the counterweight block is screwed to the counterweight recess using two bolts.

[0013] Optionally, the second counterweight portion and the third counterweight portion are both semicircular.

[0014] Compared with the effects of the prior art: When the counterweight of the present invention is driven by the operation of the drive shaft, it can not only dissipate the heat energy absorbed by the counterweight against the wind through the heat dissipation fins, but also use the rotation of the counterweight in the annular cover to generate eddy wind speed and centrifugal force, which draws the air outside the grinder into the annular cover to dissipate heat and cool the drive shaft and motor, thereby solving the high heat problem generated by the load operation of the grinder; the counterweight can also greatly reduce the volume through the design of integrally forming the heat dissipation fins to improve the convenience of installation and use, and the gapless design of the counterweight integrally forming the heat dissipation fins can also avoid noise and shaking during operation, further improving the safety of the grinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is an exploded view of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the counterweight of the utility model;

[0018] Figure 4 It is a cross-sectional view of the use of the utility model;

[0019] Figure 5 This is a schematic diagram of the counterweight and grinding accessories of the present invention in a rotating state;

[0020] Figure 6 This is an exploded view of the utility model for installing a lighter counterweight block on a smaller grinding accessory;

[0021] Figure 7 This is a cross-sectional view of a smaller grinding accessory equipped with a lighter counterweight according to the present invention;

[0022] Figure 8 This is an exploded view of the utility model for installing a heavier counterweight block on a larger grinding accessory;

[0023] Figure 9 It is a combined sectional view of the utility model for installing a heavier counterweight block on a larger grinding accessory.

[0024] In the drawings, the meanings of the reference numerals are as follows:

[0025] 10. Grinding machine;

[0026] 11. Drive shaft;

[0027] 12. Annular cover;

[0028] 13. Guide inlet;

[0029] 14. Motor box;

[0030] 141. Guided exit;

[0031] 15. Motor;

[0032] 20. Counterweight;

[0033] 21. Axis column;

[0034] 211, connecting screw hole;

[0035] 22. First counterweight;

[0036] 23. Second counterweight;

[0037] 24. The third counterweight;

[0038] 241, drop part;

[0039] 25. Heat dissipation fins;

[0040] 26. Combined space;

[0041] 27. Bearings;

[0042] 28. Connecting shaft;

[0043] 281, shaft hole;

[0044] 29. Counterweight recess;

[0045] 291, counterweight;

[0046] 292, screw hole;

[0047] 293, perforation;

[0048] 294, bolt;

[0049] 30. Grinding accessories;

[0050] 31. Center screw. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical content and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific implementation methods and with reference to the accompanying drawings.

[0052] In order to enable you, the examiner, to have a further understanding and appreciation of the purpose, features and effects of the utility model, please describe it in detail below with reference to the accompanying drawings.

[0053] First, please Figure 1 、 Figure 2 、 Figure 3As shown, a heat dissipation and air flow guide component of a grinder comprises: a grinder 10 and a counterweight body 20, a drive shaft 11 protruding from the bottom of the grinder 10, and an annular cover body 12 is provided with the drive shaft 11 as the center, a plurality of guide inlets 13 are provided at the bottom edge of the grinder 10, a motor box 14 is extended from the side of the grinder 10, the motor box 14 is used to accommodate a motor 15, and a plurality of guide outlets 141 are provided through the box wall of the motor box 14; the counterweight body 20 is integrally formed with a shaft column 21, a first counterweight part 22, a second counterweight part 23, a third counterweight part 24 and a plurality of heat dissipation fins 25, a connecting screw hole 211 is provided at the axial center position of the shaft column 21 to be assembled with the drive shaft 11, the first counterweight part 22 is formed on one side of the shaft column 21, the second counterweight part 23 and the third counterweight part 24 are provided with a plurality of heat dissipation fins 25, 24 is semicircular and overlapped on the other side of the shaft column 21. The second counterweight portion 23 is stacked above the third counterweight portion 24, and the area of ​​the third counterweight portion 24 is larger than that of the second counterweight portion 23. A step portion 241 is formed between the second counterweight portion 23 and the third counterweight portion 24. The heat dissipation fins 25 are formed equidistantly on the step portion 241 along the outer wall of the second counterweight portion 23. The bottom of the counterweight body 20 is hollowed out relative to the first counterweight portion 22 to form a combination space 26. The combination space 26 accommodates two bearings 27. The center of the bearing 27 is non-concentric with the connecting screw hole 211, and a connecting shaft 28 is connected through the bearing 27 for assembling a grinding accessory 30. The connecting shaft 28 is provided with an axial hole 281, and the grinding accessory 30 is provided with a center screw 31 assembled with the axial hole 281.

[0054] To further illustrate, the third counterweight portion 24 has an area larger than that of the first counterweight portion 22, and the first counterweight portion 22 is higher than the second counterweight portion 23 and the third counterweight portion 24, so that the connecting screw hole 211 is biased toward the first counterweight portion 22. When the counterweight body 20 is connected to the drive shaft 11 for rotation, the counterweight body 20 can generate an eccentric rotation stroke relative to the grinder 10.

[0055] Further explanation, a counterweight recess 29 is provided at the bottom end of the counterweight body 20 between the third counterweight portion 24 and the combination space 26, and the counterweight recess 29 is combined with a counterweight block 291. The counterweight block 291 has a variety of weights for selection based on the volume size of the grinding accessory 30. The counterweight recess 29 is provided with at least two screw holes 292, and the counterweight block 291 is provided with at least two through holes 293 that are aligned and connected to the two screw holes 292, and two bolts 294 are used to fix the counterweight block 291 on the counterweight recess 29 in a screw-locking manner.

[0056] The composition and use of its components, please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5As shown, the grinder 10 drives the drive shaft 11 to rotate through the motor 15, the counterweight body 20 is arranged on the drive shaft 11 with a connecting screw hole 211, and the counterweight body 20 is accommodated in the annular cover 12, and then the grinding accessory 30 is arranged in the shaft hole 281 at the bottom of the counterweight body 20 with a central screw 31, and the grinding accessory 30 is protruded outside the annular cover 12. Accordingly, when the motor 15 is started, since the shaft hole 281 and the connecting screw hole 211 are not concentrically arranged, and the eccentric design of the counterweight body 20 drives the grinding accessory 30 to perform high-speed and heavy-load eccentric rotation, further achieving the purpose of eccentric rotation grinding and polishing, the motor 15 inside the grinder 10 will generate a large amount of heat energy, which is quickly transferred to the drive shaft 11. The shaft 11 and the counterweight 20, at this time, the counterweight 20 rotates and uses the heat dissipation fins 25 to generate eddy wind speed and centrifugal force in the annular cover 12, so as to draw the air outside the grinder 10 into the annular cover 11, and then introduce it into the guide inlet 13 set at the end edge of the grinder 10, and flow along the internal channel toward the guide outlet 141 of the motor box 14, further taking out the heat energy absorbed by the transmission shaft 11 and the high temperature generated by the motor 15, so as to achieve the purpose of heat dissipation and cooling of the motor 15, thereby helping to extend the life of the motor 15, and can discharge moisture or dust generated by operation through the heat dissipation fins 25, so as to prevent moisture and dust from invading the grinder 10 and damaging the motor and control circuit, thereby helping to improve the durability of the grinder 10.

[0057] In addition, when the counterweight body 20 is assembled with the grinding accessory 30 by the connecting shaft 28, since the connecting shaft 28 is closer to the first counterweight portion 22, a counterweight block 291 needs to be installed in the counterweight recess 29 to achieve counterweight balance, and the weight of the counterweight block 391 is selected to match the body size of the grinding accessory 30, thereby improving the stability of the rotation and grinding of the grinding accessory 30. The counterweight block 391 has a weight of 5g, 9g and 19g for selection, but is not limited to this. The following embodiments demonstrate the selection of various counterweight blocks 291. First, Figure 2 、 Figure 5 As shown, the grinding machine 10 is equipped with a grinding accessory 30 of general size, the selected counterweight block 291 is 9g and is locked on the counterweight recess 29 by bolts 294; Figure 6 、 Figure 7 As shown, the grinding machine 10 is equipped with a smaller grinding accessory 30, which uses a relatively thin 5g counterweight 291 and is locked on the counterweight recess 29 by bolts 294; Figure 8 、 Figure 9 As shown, the grinder 10 is equipped with a larger grinding accessory 30 , which uses a relatively large 19g counterweight block 291 and is locked on the counterweight recess 29 with a bolt 294 .

[0058] The following benefits can be obtained through the components of the above-mentioned specific embodiment: when the counterweight body 20 of the present invention is driven by the driving shaft 11, not only can the heat energy absorbed by the counterweight body 20 be dissipated against the wind through the heat dissipation fins 25, but the heat dissipation fins 20 can also be used to rotate in the annular cover 12 to generate eddy wind speed and centrifugal force, so as to draw the air outside the grinder 10 into the annular cover 11, and dissipate heat and cool the drive 11 and the motor 15, thereby solving the high heat problem generated by the load operation of the grinder; the counterweight body 20 can also greatly reduce the volume by the design of integrally forming the heat dissipation fins 25 to improve the convenience of installation and use, and the gapless design of the heat dissipation fins 25 integrally formed on the counterweight body 20 can also avoid noise and shaking during operation, further improving the safety of the use of the grinder 10.

[0059] In summary, this utility model has indeed achieved a breakthrough structural design and possesses improved utility model content, while also being able to achieve industrial applicability and advancement. Furthermore, this utility model has not been published in any other publications and is novel, thus complying with the relevant provisions of the Patent Law. Therefore, we have filed a utility model patent application in accordance with the law and sincerely request that the examiners of the Patent Office grant us the legitimate patent rights. We would be grateful.

[0060] However, the above is only an optional embodiment of the present invention and should not be used to limit the scope of the embodiments of the present invention; that is, any equivalent changes and modifications made in accordance with the claims of the present invention should still fall within the scope of the present invention patent.

[0061] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heat dissipation and flow guiding assembly for a grinding machine, characterized in that: include: A grinding machine, wherein a driving shaft is protruding from the bottom thereof, and an annular cover is provided with the driving shaft as the center; A counterweight body is integrally formed with a shaft column, a first counterweight part, a second counterweight part, a third counterweight part and a plurality of heat dissipation fins. A connecting screw hole is provided at the axial center position of the shaft column to be assembled with the drive shaft. The first counterweight part is formed on one side of the shaft column. The second counterweight part and the third counterweight part are arc-shaped and overlapped on the other side of the shaft column. The second counterweight part is stacked above the third counterweight part, and the area of ​​the third counterweight part is larger than that of the second counterweight part, and a step portion is formed between the second counterweight part and the third counterweight part. The heat dissipation fins are equidistantly formed on the step portion along the outer wall of the second counterweight part. A connecting shaft is provided at the bottom of the counterweight body for assembling a grinding accessory.

2. The heat dissipation and air flow guiding assembly of the grinding machine according to claim 1, characterized in that: The bottom edge of the grinder is provided with a plurality of guide inlets, and a motor box is extended from the side of the grinder. The motor box is used to accommodate a driving motor, and the motor box is provided with a plurality of guide outlets through the box wall.

3. The heat dissipation and air flow guiding assembly of the grinding machine according to claim 1, characterized in that: The third counterweight portion of the counterweight body has an area larger than that of the first counterweight portion, and the first counterweight portion is higher than the second counterweight portion and the third counterweight portion, so that the connecting screw hole is biased toward the first counterweight portion. When the counterweight body is connected to the drive shaft and rotated, it can generate an eccentric rotation stroke relative to the grinding machine.

4. The heat dissipation and air flow guiding assembly of the grinding machine according to claim 1, characterized in that: The bottom end of the counterweight body is hollowed out relative to the first counterweight part to form a combination space, and the combination space accommodates two bearings. The center of the bearing is non-concentrically arranged with the connecting screw hole and is assembled with the connecting shaft. The connecting shaft is provided with an axial hole, and the grinding accessory is provided with a center screw assembled with the axial hole.

5. The heat dissipation and air flow guiding assembly of the grinding machine according to claim 4, characterized in that: A counterweight recess is provided at the bottom end of the counterweight body between the third counterweight portion and the combination space. A counterweight block is provided in cooperation with the counterweight recess. The counterweight block has various weights for selection according to the volume size of the grinding accessory.

6. The heat dissipation and air flow guiding assembly of the grinding machine according to claim 5, characterized in that: The counterweight recess is provided with at least two screw holes, and the counterweight block is provided with at least two through holes aligned and communicated with the two screw holes, and the counterweight block is fixed on the counterweight recess in a screw-locking manner using two bolts.

7. The heat dissipation and air flow guiding assembly of the grinding machine according to claim 1, characterized in that: The second counterweight portion and the third counterweight portion are both semicircular.

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