A waterproof device for a four-sided grinding wheel

Abstract

The application discloses a waterproof device for four-side grinding wheel, which comprises a bearing seat, sealing members are arranged at both ends of the bearing seat, the sealing member at one end is arranged in a bearing cover, the bearing cover is fixedly connected with the end face of the bearing seat, a main shaft is connected with the bearing seat through a bearing, the main shaft is outwardly extended at both ends and is in sealing cooperation with the sealing members, a waterproof end cover is arranged at one side end of the main shaft, a first recess is arranged on the inner side end face of the waterproof end cover, a first boss is arranged on the outer side end face of the bearing cover, a first waterproof groove is arranged on the outer circumferential surface of the first boss, and the first boss is matched with the first recess in profile. By matching the first recess with the first boss, the groove wall of the first recess covers the slot of the first waterproof groove, most of the splashed water droplets can be effectively blocked from falling into the first waterproof groove, when a small amount of water enters the first waterproof groove, the water droplets are discharged outward along the groove wall under the action of gravity, and the first waterproof groove has a first groove depth, so that the water flow can be further hindered from entering the bearing seat.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and specifically to a waterproof device for a four-sided grinding wheel. Background Technology

[0002] In recent years, coated glass has been used more and more widely in production and daily life, and the demand for edge grinding and coating removal of coated glass has been increasing. Against this background, the glass four-sided grinding machine (referred to as four-sided grinder) has emerged. The glass four-sided grinding machine grinds the side surface of coated glass with a high-speed rotating grinding wheel, and uses a diffused water flow to rinse, lubricate and cool the grinding surface.

[0003] In actual use, the grinding wheel bearing housing assembly, where the grinding wheel is mounted, is constantly exposed to splashing water droplets. Existing technology, such as Chinese patent document CN102284891A, discloses a rubber waterproofing device for glass edging machines. This device creates a path barrier for splashing water by placing a waterproof sleeve between the motor and the grinding wheel. However, this structure does not consider the waterproofing of the grinding wheel bearing housing assembly. Splashed water can easily seep into the bearing housing assembly through the gaps between the parts, affecting the normal operation of the grinding wheel.

[0004] For example, Chinese patent document CN109531335A discloses a grinding head assembly for an edge grinding machine. It forms a waterproof structure by providing a static O-ring seal between the front and rear covers and the inner wall of the bearing housing, and a rotating shaft skeleton lip seal between the front and rear covers and the grinding wheel shaft. While this structure can provide waterproofing, it still has the following shortcomings:

[0005] 1. Because the grinding wheel of the grinding head assembly of the edge grinding machine rotates at high speed, and is affected by the grinding reaction force, the assembly itself generates high-frequency micro-vibrations. For the statically set O-ring seal, the high-frequency vibration will cause the O-ring seal to move slightly, which can easily cause the O-ring seal to wear out, age, or even fail too quickly, affecting the waterproof performance of the grinding head assembly of the edge grinding machine.

[0006] 2. Because the front cover, rear cover and grinding wheel shaft are equipped with skeleton lip seals, water droplets splashed from the outside will enter the surface of the grinding wheel shaft and collect on the outside of the skeleton lip seal. Even if the high-speed rotating grinding wheel shaft generates centrifugal force on the water on its surface, without a flow guiding structure, the collected water is still not easy to be discharged. Over time, some water will still enter the bearing housing, causing grease failure, bearing damage and other faults. In severe cases, the grinding wheel cannot be used normally. Summary of the Invention

[0007] To address the shortcomings of the aforementioned technologies, this invention provides a waterproof device for a four-sided grinding wheel.

[0008] The present invention adopts the following technical solution:

[0009] A waterproof device for a four-sided grinding wheel includes a bearing housing with seals at both ends. One seal is located in a bearing cover, which is fixedly connected to the end face of the bearing housing. A main shaft is connected to the bearing housing via a bearing. Both ends of the main shaft extend outward and rotate in a sealing fit with the seals. The device is characterized in that: a waterproof end cap is provided on one side of the main shaft, the inner end face of the waterproof end cap has an annular first groove, and the outer end face of the bearing cover has an annular first boss. The outer circumferential surface of the first boss has an annular first waterproof groove. The first boss and the first groove are matched in profile. The bottom of the first groove and the end face of the first boss are in clearance fit, and the groove wall of the first groove covers the opening of the first waterproof groove.

[0010] Furthermore, the inner end face of the bearing cover is provided with an annular second groove, the end face of the bearing seat is provided with an annular second boss, the outer circumferential surface of the second boss is provided with an annular second waterproof groove, the outline of the second boss and the second groove are adapted to each other, wherein the bottom of the second groove is pressed and fitted with the end face of the second boss, and the groove wall of the second groove covers the opening of the second waterproof groove.

[0011] Furthermore, a first drainage gap is left between the root end face of the first boss and the inner end face of the waterproof end cap; a second drainage gap is left between the root end face of the second boss and the inner end face of the bearing cap.

[0012] Furthermore, the outer circumferential surface of the waterproof end cap is provided with a spiral groove, so that when the waterproof end cap rotates, the water in the spiral groove is discharged to the outer end of the waterproof end cap.

[0013] Furthermore, a truncated cone covering the first gap is provided on the outer end face of the bearing cover. The truncated cone is semi-circular and located above the horizontal center line of the bearing cover.

[0014] Compared with existing technologies, the present invention has the following advantages:

[0015] 1. This solution uses the first groove on the waterproof end cap and the first protrusion on the bearing cap to cover the opening of the first waterproof groove with the groove wall of the first groove. This can effectively prevent most of the splashed water droplets from falling into the first waterproof groove. At the same time, the water droplets on the waterproof end cap are discharged and thrown out under the action of centrifugal force. When a small amount of water enters the first waterproof groove, it is discharged through the first gap under the guidance of the water droplet's own weight and the first waterproof groove wall. In addition, the first waterproof groove has a first groove depth, which also has the function of preventing water from flowing further into the bearing seat.

[0016] 2. By providing a second waterproof groove in the bearing housing, when a small amount of water enters the second waterproof groove, the accumulated water is discharged through the second gap by the gravity of the water and the guiding effect of the second waterproof groove wall, preventing water from seeping into the connection gap between the bearing housing and the bearing cover. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the exploded structure of Embodiment 1 of the present invention;

[0018] Figure 2 This is a schematic diagram of the assembly structure of Embodiment 1 of the present invention;

[0019] Figure 3 yes Figure 2 Enlarged structural diagram at point I;

[0020] Figure 4 This is a schematic diagram of the bearing cover structure of Embodiment 1 of the present invention;

[0021] Figure 5 This is a schematic diagram of the waterproof end cap and main shaft of Embodiment 1 of the present invention;

[0022] Figure 6 This is a schematic diagram of the bearing housing structure of Embodiment 1 of the present invention;

[0023] Figure 7 This is a partial structural schematic diagram of Embodiment 2 of the present invention;

[0024] Figure 8 yes Figure 7 A schematic diagram of the direction A in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1. Bearing housing; 1a. First clearance; 1b. Second clearance; 11. Second boss; 12. Second waterproof groove; 2. Bearing cover; 21. First boss; 22. First waterproof groove; 23. Second groove; 24. Frustum; 3. Seal; 4. Bearing; 5. Main shaft; 6. Waterproof end cap; 61. First groove; 62. Spiral groove; 7. Spacer; 8. Pulley; 9. Pressure cap; 10. Grinding wheel. Detailed Implementation

[0026] To make the present invention clearer, a waterproof device for a four-sided grinding wheel of the present invention will be further described below with reference to the accompanying drawings. The specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0027] Example 1

[0028] like Figures 1 to 6As shown, a waterproof device for a four-sided grinding wheel includes a cylindrical bearing housing 1 with a flange on the left side. The bearing housing 1 has a stepped through-hole at its center and is made of aluminum alloy to reduce its weight. A bearing cover 2 is bolted to the left end of the bearing housing 1. The bearing cover 2 has a through-hole at its center, and the wall of the through-hole has a groove for installing a seal 3. Another seal 3 is installed in a groove on the inner wall of the opening at the right end of the bearing housing 1. Three bearings 4 are installed coaxially side-by-side inside the bearing housing 1. The outer ring of the left bearing 4 presses against the bearing cover 2, and the outer ring of the right bearing 4 presses against the stepped surface of the stepped hole in the bearing housing 1. All bearings 4 are fitted with a main shaft 5 extending from both sides. The main shaft 5 is a stepped shaft, with its stepped section pressed against the inner ring of the left-side bearing 4. A spacer 7 is fitted on the right side of the main shaft 5; the left end of the spacer 7 presses against the inner ring of the right-side bearing 4, and the right end of the spacer 7 presses against the end face of the pulley 8. The pulley 8 is connected to the right end of the main shaft 5 by a key and is axially fixed by a pressure cap 9. The surface of the spacer 7 is in sealing engagement with the seal 3 on the right side, and the left circumferential surface of the main shaft 5 is in sealing engagement with the corresponding seal 3. The seal 3 is a skeleton lip seal ring. The bearing 4 is a rolling bearing, which can be a deep groove ball bearing or an angular contact bearing. The pulley 8 is connected to a reduction motor via a belt, providing driving force to the main shaft 5.

[0029] A waterproof end cap 6 is integrally formed on the left end of the main shaft 5, and the waterproof end cap 6 is coaxial with the main shaft 5. The outer side of the waterproof end cap 6 can be fixedly connected to the grinding wheel 10 by bolts. An annular first groove 61 is provided on the inner (right) end face of the waterproof end cap 6. An annular first boss 21 is provided on the outer (left) end face of the bearing cover 2, and an annular first waterproof groove 22 is provided on the outer circumferential surface of the first boss 21, and the right side wall of the first waterproof groove 22 is coplanar with the root end face of the first boss 21. The contours of the first boss 21 and the first groove 61 are adapted to each other. The groove wall of the first groove 61 is clearance-fitted with the circumferential surface of the first boss 21; the groove bottom of the first groove 61 is clearance-fitted with the end face of the first boss 21, and the clearance is 0.1mm-0.02mm, so as to minimize the clearance size while ensuring that the relative movement of the waterproof end cap 6 and the bearing cover 2 does not interfere. The groove wall of the first groove 61, away from the axis, covers the opening of the first waterproof groove 22 to reduce the open area of ​​the opening of the first waterproof groove 22, further reducing the amount of splashed water droplets entering the first waterproof groove 22. A first gap 1a is left between the root end face of the first boss 21 and the inner end face of the waterproof end cap 6 to allow water in the first waterproof groove 22 to drain out.

[0030] The bearing cover 2 has an annular second groove 23 on its inner (right) end face, and the bearing seat 1 has an annular second boss 11 on its flanged end face. The outer circumferential surface of the second boss 11 has an annular second waterproof groove 12. The right side wall of the second waterproof groove 12 is coplanar with the root end face of the second boss 11. The second boss 11 and the second groove 23 are contoured to fit together. The wall of the second groove 23 is tightly fitted to the circumferential surface of the second boss 11. The bottom of the second groove 23 is pressed tightly against the end face of the second boss 11. The groove wall of the second groove 23, away from the axis, covers the opening of the second waterproof groove 12 to reduce the open area of ​​the second waterproof groove 12, further reducing the amount of splashed liquid entering the second waterproof groove 12. A second gap 1b is left between the root end face of the second boss 11 and the inner end face of the bearing cover 2 for water to drain from the second waterproof groove 12.

[0031] In use, the device drives the main shaft 5 to rotate at high speed via the pulley 8, which in turn drives the waterproof end cap 6 to rotate. The groove wall of the first groove 61 covers the opening of the first waterproof groove 22, effectively preventing most splashed water droplets from falling into the first waterproof groove 22. At the same time, water droplets on the circumferential surface of the waterproof end cap 6 are flung out by the centrifugal force of rotation. When a small amount of water enters the first waterproof groove 22, it is discharged through the first gap by the weight of the water droplets and the guiding effect of the groove wall. In addition, the first waterproof groove has a first groove depth, which also prevents water from flowing further into the bearing seat. When externally splashed water droplets seep in through the second gap 1b of the bearing cover 2 and the bearing seat 1, they first enter the second waterproof groove 12. Since the second waterproof groove 12 has a certain groove depth and the bearing cover 2 and the bearing seat 1 are fixed, the water that seeps in slides down the second waterproof groove 12 to the bottom by its own gravity before it fills the second waterproof groove 12, and is discharged out through the second gap 1b, thus achieving the waterproof function.

[0032] Example 2

[0033] This embodiment is a further optimization based on the above embodiment 1, such as... Figure 7 , Figure 8 As shown, a spiral groove 62 is provided on the outer circumferential surface of the waterproof end cap 6, arranged along its axial direction. The direction of rotation of the spiral groove 62 is set according to the rotation of the waterproof end cap 6, so that when the waterproof end cap 6 rotates, the water in the spiral groove is discharged outward from the waterproof end cap 6. For example, looking from direction A in the figure, when the waterproof end cap 6 rotates clockwise, the direction of rotation of the waterproof end cap 6 is right-handed. Analogous to the working mechanism of the auger pushing material, the water splashed onto the circumference of the waterproof end cap 6 will be discharged outward from the outer end face of the waterproof end cap 6 along the spiral groove. In addition, when the waterproof end cap 6 rotates too fast, water can also be centrifugally thrown out along the groove wall of the spiral groove.

[0034] A truncated cone 24 covering the first gap 1a is also provided on the outer end face of the bearing cover 2. The truncated cone 24 is semi-annular and located above the horizontal center line of the bearing cover 2. The truncated cone 24 and the spiral groove 62 have a small gap and do not interfere with each other. The inclined surface of the truncated cone 24 points towards the spiral groove 62, so that water splashed on its surface can be guided into the spiral groove 62 and discharged smoothly by the rotation of the spiral groove 62. The truncated cone 24 is made of engineering plastic and is fixedly connected to the bearing cover 2 by screws.

[0035] By setting the spiral groove 62, this application can actively guide the water on its surface to the outside, reducing the amount of water entering the first gap 1a; by setting the cone 24 and covering the first gap 1a, the splashed water is further reduced to enter it, and the grinding material during the grinding process is also prevented from entering it. The cone 24 adopts a semi-circular structure and is set on the upper side of the horizontal center line of the bearing cover 2, so as to prevent the water in the first gap 1a from flowing to the bottom and being discharged.

[0036] The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. However, obvious variations or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A waterproof device for a four-sided grinding wheel, comprising a bearing housing (1), with seals (3) provided at both ends of the bearing housing (1), one end of which is disposed in a bearing cover (2), the bearing cover (2) being fixedly connected to the end face of the bearing housing (1), a main shaft (5) being connected inside the bearing housing (1) via a bearing (4), the two ends of the main shaft (5) extending outward and rotating and sealingly engaging with the seals (3), characterized in that: The main shaft (5) has a waterproof end cap (6) on one side end. The inner end face of the waterproof end cap (6) has an annular first groove (61). The outer end face of the bearing cover (2) has an annular first boss (21). The outer circumferential surface of the first boss (21) has an annular first waterproof groove (22). The first boss (21) and the first groove (61) are matched in contour. The bottom of the first groove (61) and the end face of the first boss (21) are in clearance fit. The groove wall gap of the first groove (61) covers the opening of the first waterproof groove (22). The bearing cover (2) has an annular second groove (23) on its inner end face, and the bearing seat (1) has an annular second boss (11) on its end face. The outer circumferential surface of the second boss (11) has an annular second waterproof groove (12). The second boss (11) and the second groove (23) are matched in contour. The bottom of the second groove (23) is pressed against the end face of the second boss (11), and the groove wall of the second groove (23) covers the opening of the second waterproof groove (12). The root end face of the first boss (21) and the inner end face of the waterproof end cap (6) have a first drainage gap (1a); the root end face of the second boss (11) and the inner end face of the bearing cap (2) have a second drainage gap (1b). The waterproof end cap (6) has a spiral groove (62) on its outer circumferential surface. When the waterproof end cap (6) rotates, the water in the spiral groove is discharged to the outer end of the waterproof end cap (6). The outer end face of the bearing cover (2) is also provided with a cone (24) that covers the first gap (1a). The cone (24) is semi-circular and located above the horizontal center line of the bearing cover (2). The left end of the main shaft (5) is provided with an integrated waterproof end cap (6). The waterproof end cap (6) is coaxial with the main shaft (5). The outer side of the waterproof end cap (6) can be fixedly connected to the grinding wheel (10) by bolts.

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