A grinding wheel chuck

Abstract

The utility model relates to a kind of grinding wheel chuck in grinding wheel clamp technical field, including disc body and disc cover, disc body and disc cover are detachably connected by locking bolt between, the center of the bottom of disc body is equipped with conical mounting hole;A circle of concave ring is equipped on disc cover, multiple adjustable balancing blocks are equipped in concave ring along circumference direction, balancing block is ring sector matched with concave ring, the center of balancing block is equipped with adjusting hole, adjusting hole is cooperated with tight bolt, through-hole is equipped on the side wall of balancing block, through-hole is communicated with adjusting hole, steel ball is equipped in through-hole, the length of through-hole is less than the diameter of steel ball, steel ball is leaked from the both ends of through-hole respectively, steel ball leaked from one end of through-hole is contacted with concave ring side wall, steel ball leaked from the other end of through-hole is cooperated with tight bolt. The utility model can more quickly realize the dynamic balance of grinding wheel used on numerical control high-speed grinder equipment after adjusting, improve work efficiency and accuracy, prolong service life, save labor, effectively reduce cost.

Description

Technical Field

[0001] This utility model belongs to the field of grinding wheel clamping technology, specifically relating to a grinding wheel chuck. Background Technology

[0002] A grinding wheel chuck is a mechanical clamping structure used to hold grinding wheels, allowing operators to securely install them on CNC high-speed grinding machines. Traditional grinding wheel chucks clamp the grinding wheel to both ends using two circular flanges. While simple in structure, this method suffers from low clamping precision and lacks a reference scale for adjusting the balance weight angle. The annular groove for the balance weight requires milling a notch at a specific angle, which reduces the weight at that angle, making the chuck itself heavier. This self-weight imbalance affects the dynamic balance accuracy of the grinding wheel chuck. Furthermore, the mounting hole for the traditional CNC grinding wheel shaft is cylindrical. This cylindrical assembly results in low precision; a loose fit lacks accuracy, while a tight fit makes disassembly difficult. Since grinding wheels are consumables, frequent removal and replacement are necessary. Traditional grinding wheel chucks are inconvenient to use, and the low assembly precision can lead to instability in grinding wheel operation. Therefore, a grinding wheel chuck is needed to solve the above-mentioned technical problems. Summary of the Invention

[0003] To address the aforementioned deficiencies in the existing technology, this utility model provides a grinding wheel chuck, comprising a chuck body and a chuck cover. The chuck body and the chuck cover are detachably connected by locking bolts. A mounting hole is provided at the center of the bottom of the chuck body. The mounting hole is conical, and the mounting hole that mates with the mounting shaft of the grinding wheel chuck on the chuck body is also conical. This makes it easier to install and remove the grinding wheel chuck, and after locking, the mating surfaces of the conical mounting hole fit more tightly, thus improving stability and accuracy. A concave ring is provided on the chuck cover, and multiple adjustable balance blocks are provided circumferentially inside the concave ring.

[0004] The balance block is a fan-shaped ring that matches the concave ring. The balance block has an adjustment hole at its center, which is fitted with a set bolt. The side wall of the balance block has a through hole that communicates with the adjustment hole. A steel ball is placed inside the through hole. The length of the through hole is less than the diameter of the steel ball. The two sides of the steel ball protrude from both ends of the through hole. The steel ball protruding from one end of the through hole contacts the side wall of the concave ring, and the steel ball protruding from the other end of the through hole is fitted with the set bolt.

[0005] Place the balance weight into the concave ring of the disc cover. By rotating the set bolt, the set bolt moves down and presses down on the steel ball. The steel ball is fixed by pressing against the side wall of the concave ring. The lateral pressure achieves the function of fixing the balance weight. When it is necessary to move and adjust the balance weight, loosen the set bolt. The set bolt moves up and releases the pressure on the steel ball. The lateral pressure of the steel ball on the side wall of the concave ring is reduced, so the balance weight can be loosened and moved.

[0006] Preferably, each of the balancing blocks is labeled. The labels serve as markers. When adjusting the dynamic balance of the grinding wheel, it needs to rotate at high speed. During high-speed rotation, uneven dynamic balance will cause a certain amount of vibration. After stopping the equipment, the balancing blocks are adjusted according to the displayed dynamic balance value. Since multiple adjustments are required, without labels, it would be impossible to distinguish which balancing block was last adjusted after the grinding wheel stops. Therefore, labeling the balancing blocks is crucial for more precise adjustment.

[0007] Preferably, the outer ring of the concave ring has a scale line on the corresponding disc cover. The scale line can be an equal division of the circumference of the concave ring and an angle value, which can provide a scale reference when the balance block moves.

[0008] Preferably, the locking bolt is located on the disc cover inside the inner ring of the concave ring.

[0009] Preferably, the center of the top of the disc body is provided with an internal thread, which is fitted with a shaft extractor, and the shaft extractor is fitted with an ejector bolt. The main function of the internal thread is to install the shaft extractor of the grinding wheel chuck. The shaft extractor of the grinding wheel chuck is locked onto the internal thread, and then the ejector bolt on the shaft extractor is tightened. The ejector bolt presses against the end face (shaft head) of the grinding wheel chuck mounting shaft. Since the shaft extractor is already fixed to the disc body, tightening the ejector bolt again generates an outward pulling force, thereby easily removing the entire grinding wheel chuck disc body from the grinding wheel chuck mounting shaft.

[0010] This utility model also includes other components that enable the normal use of a grinding wheel chuck, such as a grinding wheel chuck mounting shaft that mates with the mounting hole, all of which are conventional technical means in the art. In addition, devices or components not limited in this utility model, such as the disc body, set bolt, locking bolt, balance weight, disc cover, steel balls, shaft extractor, ejector bolt, etc., all adopt conventional technical means and conventional equipment in the art.

[0011] Working principle: The grinding wheel is placed between the disc body and the disc cover. The disc body and the disc cover are fixed together by locking bolts to clamp the grinding wheel. The disc body is installed on the grinding wheel chuck mounting shaft through the mounting holes, so that it can be used on CNC high-speed grinding machines. Before use, the dynamic balance of the grinding wheel must be adjusted to the highest precision. Specifically, when adjusting the dynamic balance of the grinding wheel, the grinding wheel needs to be rotated at high speed. During high-speed rotation, a certain amount of vibration will occur due to uneven dynamic balance. After stopping the equipment, adjust each balance block according to the dynamic balance value displayed. Loosen the set bolts, and the set bolts move upward to release the compression of the steel balls. The lateral pressure of the steel balls on the concave ring sidewall decreases, so the balance blocks can be loosened and moved. After adjustment, rotate the set bolts to move them downward to press the steel balls. The lateral pressure of the steel balls on the concave ring sidewall achieves the function of fixing the balance blocks.

[0012] The beneficial effects of this utility model are: it can more quickly achieve dynamic balance adjustment of the grinding wheel used on CNC high-precision grinding machines, improve work efficiency and accuracy, extend service life, save labor, and effectively reduce costs. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the structure of a grinding wheel chuck in an embodiment of the present invention;

[0015] Figure 2 for Figure 1 Top view;

[0016] Figure 3 for Figure 2 View from point AA;

[0017] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0018] Figure 5 This is a schematic diagram of the balance block structure;

[0019] Figure 6 for Figure 5 Exploded view;

[0020] Figure 7 for Figure 1 Exploded view;

[0021] Figure 8 This is a schematic diagram of the assembly of the disc body and the grinding wheel chuck mounting shaft.

[0022] In the diagram: 1. Grinding wheel; 2. Disc cover; 3. Disc body; 4. Balance block; 5. Set bolt; 6. Locking bolt; 7. Mounting hole; 8. Steel ball; 9. Paper gasket; 10. Scale line; 11. Concave ring; 12. Grinding wheel chuck mounting shaft; 13. Shaft remover; 14. Ejector bolt; 15. Internal thread. Detailed Implementation

[0023] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention. Example

[0024] like Figure 1-8 As shown, this utility model provides a grinding wheel chuck, including a chuck body 3 and a chuck cover 2. The chuck body 3 and the chuck cover 2 are detachably connected by locking bolts 6. The bottom center of the chuck body 3 is provided with a mounting hole 7. The mounting hole 7 is conical. The mounting hole 7 that mates with the grinding wheel chuck mounting shaft 12 of the chuck body 3 is conical, which makes it more convenient to install and remove the grinding wheel chuck. After locking, the mating surfaces of the conical mounting hole 7 will fit more tightly, thereby making it more stable and improving accuracy. The chuck cover 2 is provided with a concave ring 11. Multiple adjustable balance blocks 4 are provided circumferentially inside the concave ring 11.

[0025] The balance block 4 is a fan-shaped ring that matches the concave ring 11. The balance block 4 has an adjustment hole in its center, which is fitted with a set bolt 5. The side wall of the balance block 4 has a through hole that communicates with the adjustment hole. A steel ball 8 is placed inside the through hole. The length of the through hole is less than the diameter of the steel ball 8. The two sides of the steel ball 8 protrude from both ends of the through hole. The steel ball 8 protruding from one end of the through hole contacts the side wall of the concave ring 11, and the steel ball 8 protruding from the other end of the through hole is fitted with the set bolt.

[0026] Each of the aforementioned balance blocks 4 is labeled. These labels serve a marking function. When adjusting the dynamic balance of the grinding wheel 1, it needs to rotate at high speed. During high-speed rotation, uneven dynamic balance will cause a certain amount of vibration. After stopping the equipment, each balance block 4 is adjusted according to the displayed dynamic balance value. Since multiple adjustments are required, without labels, it would be impossible to distinguish which balance block 4 was adjusted last time after the grinding wheel 1 stops. Therefore, marking the balance blocks 4 is crucial for more precise adjustment.

[0027] The outer ring of the concave ring 11 has a scale line 10 on the corresponding disc cover 2. The scale line 10 can be the circumference of the concave ring 11 divided into scale lines 10 and angle values, so that the balance block 4 can have a scale reference when it moves.

[0028] The locking bolt 6 is located on the disc cover 2 inside the inner ring of the concave ring 11.

[0029] The top center of the disc body 3 is provided with an internal thread 15, which is fitted with a shaft extractor 13, and the shaft extractor 13 is fitted with an ejector bolt 14. The main function of the internal thread 15 is to install the shaft extractor 13 of the grinding wheel chuck. After locking the shaft extractor 13 of the grinding wheel chuck onto the internal thread 15, the ejector bolt 14 on the shaft extractor 13 is turned. The ejector bolt 14 presses against the end face (shaft head) of the shaft of the grinding wheel chuck mounting shaft 12. Since the shaft extractor 13 is already fixed on the disc body 3, the ejector bolt 14 is tightened again. At this time, the ejector bolt 14 generates an outward pulling force, so that the entire disc body 3 clamped by the grinding wheel 1 can be easily removed from the grinding wheel 1 chuck mounting shaft 12.

[0030] The grinding wheel 1 is placed between the disc body 3 and the disc cover 2. A paper shim 9 can be placed between the disc cover 2 and the grinding wheel 1. The disc body 3 and the disc cover 2 are fixed together by the locking bolts 6 to clamp the grinding wheel 1. The disc body 3 is installed on the grinding wheel chuck mounting shaft 12 through the mounting holes 7, so that it can be used on CNC high-speed grinding machines. Before use, the dynamic balance of the grinding wheel 1 must be adjusted to the highest precision. Specifically, when adjusting the dynamic balance of the grinding wheel 1, the grinding wheel 1 needs to be rotated at high speed. During high-speed rotation, the dynamic balance will be adjusted. The unevenness causes a certain amount of shaking. After stopping the equipment, adjust each balance block 4 according to the dynamic balance displayed. Loosen the set bolt 5, and the set bolt 5 moves upward, releasing the pressure on the steel ball 8. The lateral pressure of the steel ball 8 on the side wall of the concave ring 11 is reduced, so the balance block 4 can be loosened and moved. After the adjustment is completed, rotate the set bolt 5 to move the set bolt 5 downward and press the steel ball 8. The lateral pressure of the steel ball 8 on the side wall of the concave ring 11 achieves the effect of fixing the balance block 4.

[0031] The paper gasket, disc body, set bolt, locking bolt, balance block, disc cover, steel ball, shaft extractor, ejector bolt, and grinding wheel chuck mounting shaft mentioned in the above embodiments are all existing technologies. This application does not improve them, but only utilizes their existing functions. For their specific structure and principle, please refer to the product manual or existing technical data, which are all existing technologies.

[0032] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A grinding wheel chuck, comprising a chuck body and a chuck cover, wherein the chuck body and the chuck cover are detachably connected by locking bolts, and a mounting hole is provided at the center of the bottom of the chuck body; characterized in that: The mounting hole is conical, and the disc cover has a concave ring with multiple adjustable balance blocks arranged circumferentially inside the concave ring. The balance block is a fan-shaped ring that matches the concave ring. The balance block has an adjustment hole at its center, which is fitted with a set bolt. The side wall of the balance block has a through hole that communicates with the adjustment hole. A steel ball is placed inside the through hole. The length of the through hole is less than the diameter of the steel ball. The two sides of the steel ball protrude from both ends of the through hole. The steel ball protruding from one end of the through hole contacts the side wall of the concave ring, and the steel ball protruding from the other end of the through hole is fitted with the set bolt.

2. The grinding wheel chuck according to claim 1, characterized in that: The various balance blocks are labeled.

3. The grinding wheel chuck according to claim 1, characterized in that: The outer ring of the concave ring has a scale line on the corresponding disc cover.

4. A grinding wheel chuck according to claim 1, characterized in that: The locking bolt is located on the disc cover inside the inner ring of the concave ring.

5. A grinding wheel chuck according to claim 1, characterized in that: The center of the top of the disc is provided with an internal thread, which is used to engage a shaft extractor.

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