Guide wheel device and wire cutting machine with same

Abstract

The guide wheel device comprises a guide wheel and a bearing assembly, the guide wheel is arranged on a center shaft, the center shaft is connected with the bearing assembly in a rotating mode, a limiting boss is arranged at the end, provided with the guide wheel, of the center shaft, and the bearing assembly is connected with the center shaft in a rotating mode. The limiting boss is arranged on the side, close to the bearing assembly, of the guide wheel, the end, close to the bearing assembly, of the limiting boss is arranged in the end of the bearing assembly in a sleeved mode, and a gap is formed between the guide wheel and the end of the bearing assembly. The guide wheel has the advantages that friction between the guide wheel and the end face of the bearing assembly is reduced, rotation of the guide wheel is more flexible, silicon sludge is more convenient to clean, the guide wheel is not prone to being clamped, wire breakage is reduced, normal production is guaranteed, production efficiency is improved, silicon sludge and cutting fluid are effectively prevented from entering a bearing, and the service life of the bearing assembly is prolonged. And the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of wire cutting machines, and particularly relates to a guide wheel device and a wire cutting machine provided with the guide wheel device. Background Art

[0002] A wire cutting machine is a main production device in the photovoltaic industry and is used to cut silicon rods into silicon wafers. The guide wheel device is an important accessory of the wire cutting machine. During operation, the guide wheel device cooperates with the diamond wire to guide the diamond wire. In the prior art, the guide wheel device includes a bearing assembly and a guide wheel. The bearing assembly is fixed on the wire cutting machine, and the guide wheel is arranged at one end of the bearing assembly and is rotationally connected to the bearing assembly by a central shaft. The guide wheel is prone to friction with the end face of the bearing assembly, and the silicon mud generated during wire cutting is easily stuck between the guide wheel and the bearing assembly and is not easy to clean, causing the guide wheel to be stuck, resulting in the diamond wire breaking, the equipment malfunctioning, and the production efficiency being reduced. Content of the Utility Model

[0003] To solve the above technical problems, the utility model provides a guide wheel device and a wire cutting machine provided with the guide wheel device, effectively solving the technical problem that the guide wheel and the end face of the bearing assembly are easily stuck by silicon mud, resulting in the diamond wire breaking, and overcoming the deficiencies of the prior art.

[0004] The technical solution adopted by the utility model is: a guide wheel device includes a guide wheel and a bearing assembly. The guide wheel is arranged on a central shaft, and the central shaft is rotationally connected to the bearing assembly. A limiting boss is provided at one end of the central shaft where the guide wheel is located. The limiting boss is arranged on the side of the guide wheel close to the bearing assembly. One end of the limiting boss close to the bearing assembly is sleeved inside the end of the bearing assembly, so that there is a gap between the guide wheel and the end of the bearing assembly.

[0005] Further, the gap is set to be 3 - 4 mm.

[0006] Further, a cover plate is provided at one end of the bearing assembly close to the guide wheel, and the cover plate is sleeved outside the limiting boss.

[0007] Further, a sealing convex ring is provided on the side of the limiting boss close to the bearing assembly, and the sealing convex ring is adapted to the end face of the bearing assembly.

[0008] Further, a first groove is provided on the side of the limiting boss where the sealing convex ring is located.

[0009] Further, the bearing assembly includes a bearing main body, a bearing is arranged inside the bearing main body, one end of the central shaft far from the guide wheel is connected to the bearing, and one end of the bearing main body close to the guide wheel is adapted to the sealing convex ring and is detachably connected to the cover plate.

[0010] Further, a second groove is provided at one end of the bearing body close to the guide wheel. The second groove is adapted to the sealing convex ring, and a gap is provided between the second groove and the sealing convex ring.

[0011] Further, an air inlet hole is provided in the circumferential direction of the bearing body, an air outlet hole is provided on the second groove, the air inlet hole is communicated with the air outlet hole, and the air outlet hole is used for blowing air into the gap.

[0012] Further, a rear cover is provided at one end of the bearing assembly away from the guide wheel.

[0013] The present utility model also provides a tangent machine, which is provided with the guide wheel device as described above.

[0014] The advantages and positive effects of the present utility model are as follows: By adopting the above technical solution, the friction between the guide wheel and the end face of the bearing assembly is reduced, the rotation of the guide wheel is more flexible, the cleaning of the silicon mud is more convenient, the guide wheel is not easily stuck, the occurrence of wire breakage is reduced, normal production is ensured, the production efficiency is improved, the entry of silicon mud and cutting fluid into the bearing is effectively prevented, and the service life of the bearing is prolonged. Description of the Drawings

[0015] Figure 1 is an overall schematic diagram of a guide wheel device according to an embodiment of the present utility model.

[0016] Figure 2 is an overall exploded view of a guide wheel device according to an embodiment of the present utility model.

[0017] Figure 3 is a connection schematic diagram of a guide wheel device without the guide wheel according to an embodiment of the present utility model.

[0018] Figure 4 is a sectional view of a connection of a guide wheel device without the guide wheel according to an embodiment of the present utility model.

[0019] Figure 5 is a partial enlarged view of a guide wheel device A according to an embodiment of the present utility model.

[0020] Figure 6 is a schematic diagram of the central shaft structure of a guide wheel device according to an embodiment of the present utility model.

[0021] Figure 7 is a schematic diagram of the bearing body structure of a guide wheel device according to an embodiment of the present utility model.

[0022] Figure 8 is a schematic diagram of the rear cover structure of a guide wheel device according to an embodiment of the present utility model.

[0023] In the figure:

[0024] 1. Guide wheel 2. Bearing body 3. Bearing

[0025] 4. Central axis 5. Fastener 6. Limit boss

[0026] 7. Cover plate 8. Sealing convex ring 9. First groove

[0027] 10. Second groove 11. Air inlet hole 12. Air outlet hole

[0028] 13. Rear cover 14. Countersunk hole 15. First threaded hole

[0029] 16. Step hole 17. Second threaded hole 18. Third threaded hole

[0030] d. Gap Specific implementation mode

[0031] The embodiment of the utility model provides a guide wheel device, and the embodiment of the utility model will be described below with reference to the accompanying drawings.

[0032] In the description of the embodiment of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation to the present utility model. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "set", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0033] Such as Figures 1 - 4As shown in the figure, an idler wheel device according to an embodiment of the present utility model includes an idler wheel 1 and a bearing assembly. The idler wheel 1 is sleeved on a central shaft 4 through a flat key or a spline sleeve, and there is no relative rotation with the central shaft 4. A fastener 5 is threadedly connected to the end of the central shaft 4 to axially position the idler wheel 1, so that the idler wheel 1 is fixedly connected to the central shaft 4. One end of the central shaft 4 away from the idler wheel 1 is rotatably connected to a bearing 3 assembly. One end of the central shaft 4 where the idler wheel 1 is provided is integrally provided with a limit boss 6. The limit boss 6 is arranged on the side of the idler wheel 1 close to the bearing assembly. One end of the limit boss 6 close to the bearing assembly is sleeved inside the end of the bearing assembly, so that there is a gap d between the idler wheel 1 and the end of the bearing assembly. When the diamond wire drives the idler wheel 1 to rotate, due to the gap d between the idler wheel 1 and the end of the bearing assembly, the idler wheel 1 will not rub against the end of the bearing assembly, and the rotation is more flexible. When the silicon mud is stuck between the end faces of the idler wheel 1 and the bearing assembly, due to the existence of the gap, the cleaning of the silicon mud is more convenient, it is not easy to cause the idler wheel 1 to be stuck, the occurrence of wire breakage is reduced, and normal production is ensured.

[0034] Specifically, in order to prevent the coolant and silicon mud from affecting the normal operation of the bearing assembly and improve the service life of the bearing assembly, a cover plate 7 is provided at one end of the bearing assembly close to the idler wheel 1. The cover plate 7 is arranged in a ring shape and is detachably connected to the end of the bearing assembly by bolts. The cover plate 7 is sleeved outside the limit boss 6. When the central shaft 4 rotates, it will drive the limit boss 6 to rotate. In order not to affect the normal rotation of the idler wheel 1, one end of the limit boss 6 close to the cover plate 7 is in clearance fit with the cover plate 7. The gap d is the distance between the idler wheel 1 and the cover plate 7. By setting the gap d, the idler wheel 1 will not rub against the cover plate 7 when rotating, and the rotation is more flexible.

[0035] Specifically, as Figures 4 - 6 shown, in order to prevent the silicon mud and cutting fluid from entering the bearing assembly through the gap between the limit boss 6 and the cover plate 7, a sealing convex ring 8 is provided on one side of the limit boss 6 close to the bearing assembly. The sealing convex ring 8 is adapted to the end face of the bearing assembly. The sealing convex ring 8 is integrally provided with the limit boss 6. When the idler wheel 1 rotates, the sealing convex ring 8 will also rotate. In order not to affect the rotation of the idler wheel 1, there is also a gap between the sealing convex ring 8 and the end face of the bearing assembly.

[0036] Specifically, in order to prevent the side of the limit boss 6 close to the bearing assembly from contacting the end face of the bearing assembly and affecting the rotation of the idler wheel 1, a first groove 9 is provided on the side of the limit boss 6 where the sealing convex ring 8 is provided. The first groove 9 is an annular groove.

[0037] Specifically, as Figure 2 、 Figure 4 and Figure 7As shown, the bearing assembly includes a bearing body 2, in which a bearing 3 is fixed. The outer ring of the bearing 3 is embedded in the bearing body 2, and the inner ring of the bearing 3 is connected to one end of the central shaft 4 away from the guide wheel 1, so that the central shaft 4 is rotatably connected to the bearing body 2. One end of the bearing body 2 close to the guide wheel 1 is adapted to the sealing convex ring 8 and is detachably connected to the cover plate 7 by bolts. The number of bearings 3 is not limited.

[0038] Specifically, as Figure 4 shown, one end of the bearing body 2 close to the guide wheel 1 is provided with a second groove 10, which is adapted to the sealing convex ring 8 and is an annular groove. There is a gap between the second groove 10 and the sealing convex ring 8. In order not to affect the rotation of the guide wheel 1, the sealing convex ring 8 and the second groove 10 do not directly contact. By setting the gaps between the sealing convex ring 8 and the second groove 10 and between the cover plate 7 and the limiting boss 6, a curved sealing structure is formed, making it difficult for silicon mud and cutting fluid to enter the interior of the bearing assembly.

[0039] Preferably, as Figure 4 、 Figure 5 and Figure 7 shown, the bearing body 2 is provided with air inlet holes 11 in the circumferential direction, and the second groove 10 is provided with air outlet holes 12, and the air inlet holes 11 and the air outlet holes 12 are communicated. The air inlet holes 11 are provided with internal threads for installing pipe joints to connect with external pipelines to ventilate the air outlet holes 12, and the air outlet holes 12 ventilate the second groove 10, and the gas flows out from the gap between the cover plate 7 and the limiting boss 6, which can effectively prevent silicon mud and cutting fluid from entering the interior of the bearing assembly from the gap between the cover plate 7 and the limiting boss 6.

[0040] Specifically, as Figure 8 shown, one end of the bearing assembly away from the guide wheel 1 is provided with a rear cover 13, and the rear cover 13 is detachably connected to the bearing body 2 by bolts.

[0041] Preferably, the gap d is set to 3 - 4 mm. The gap d should not be too large or too small. If the gap d is too large, the cooperation between the guide wheel 1 and the bearing assembly will be poor, and the guide wheel 1 will shake abnormally during rotation. If the gap d is too small, the gas flowing out from the gap between the cover plate 7 and the limiting boss 6 is likely to blow onto the guide wheel 1, affecting the rotational stability of the guide wheel 1.

[0042] A wire cutting machine is provided with a guide wheel device as described above. The rear cover 13 is connected to the wire cutting machine by bolts, so that the entire guide wheel device is fixed on the wire cutting machine. The diamond wire is wound around the guide wheel 1 to drive the guide wheel 1 to rotate. The guide wheel 1 drives the central shaft 4 to rotate. The limiting boss 6 rotates within the cover plate 7, and the sealing convex ring 8 rotates within the second groove 10. During the cutting process, an external pipeline is connected to the air inlet hole 11, and the air outlet hole 12 discharges air to prevent silicon mud and cutting fluid from entering the bearing assembly. Regularly cleaning the gap d between the guide wheel 1 and the cover plate 7 can effectively prevent the guide wheel 1 from jamming and reduce the occurrence of wire breakage.

[0043] Embodiment: A guide wheel device includes a guide wheel 1 and a bearing assembly. The guide wheel 1 is sleeved on the central shaft 4 through a flat key. A fastener 5 is threadedly connected to the end of the central shaft 4 to fixedly connect the guide wheel 1 and the central shaft 4. One end of the central shaft 4 away from the guide wheel 1 is rotatably connected to the bearing assembly. A limiting boss 6 is integrally provided at the end of the central shaft 4 where the guide wheel 1 is located. The limiting boss 6 is disposed on the side of the guide wheel 1 close to the bearing assembly. One end of the limiting boss 6 close to the bearing assembly is sleeved inside the end of the bearing assembly, so that there is a gap d between the guide wheel 1 and the end of the bearing assembly. The gap d is set to 3.5 mm. An annular cover plate 7 is provided at one end of the bearing assembly close to the guide wheel 1, and is detachably connected to the bearing assembly by bolts. The cover plate 7 is sleeved outside the limiting boss 6, and one end of the limiting boss 6 close to the cover plate 7 is in clearance fit with the cover plate 7. A sealing convex ring 8 is provided on the side of the limiting boss 6 close to the bearing assembly. The sealing convex ring 8 is integrally provided with the limiting boss 6, and the sealing convex ring 8 is adapted to the end face of the bearing assembly. A first groove 9 is provided on the side of the limiting boss 6 where the sealing convex ring 8 is located, specifically set as an annular groove. The bearing assembly includes a bearing body 2. Two bearings 3 are fixed inside the bearing body 2. The outer rings of the bearings 3 are embedded in the bearing body 2. The inner rings of the bearings 3 are connected to one end of the central shaft 4 away from the guide wheel 1, so that the central shaft 4 is rotatably connected to the bearing body 2. A second groove 10 is provided at one end of the bearing body 2 close to the guide wheel 1. The second groove 10 is adapted to the sealing convex ring 8 and is an annular groove. There is a gap between the second groove 10 and the sealing convex ring 8. A counterbore 14 is provided on the cover plate 7, and a first threaded hole 15 is provided at the corresponding position on the bearing body 2. The counterbore 14 and the first threaded hole 15 are connected by bolts. An air inlet hole 11 is provided circumferentially on the bearing body 2, and an air outlet hole 12 is provided on the second groove 10. The air inlet hole 11 and the air outlet hole 12 are communicated. Internal threads are provided in the air inlet hole 11 for installing a pipe joint to connect to an external pipeline. A rear cover 13 is provided at one end of the bearing assembly away from the guide wheel 1. The rear cover 13 is detachably connected to the bearing body 2 by bolts. A stepped hole 16 is provided on the bearing body 2, and a second threaded hole 17 is provided on the rear cover 13. The stepped hole 16 and the second threaded hole 17 are connected by bolts. A third threaded hole 18 is provided on the rear cover 13 and is connected to the wire cutting machine by bolts.

[0044] The advantages and positive effects of the present utility model are as follows:

[0045] 1. By providing a limiting boss, a gap is provided between the guide wheel and the end face of the bearing assembly, reducing the friction between the guide wheel and the end face of the bearing assembly and making the rotation of the guide wheel more flexible.

[0046] 2. The provision of the gap makes it more convenient to clean the silicon mud, the guide wheel is not easily jammed, the occurrence of wire breakage is reduced, normal production is ensured, and production efficiency is improved.

[0047] 3. By providing an air inlet hole and an air outlet hole, silicon mud and cutting fluid are effectively prevented from entering the bearing, and the service life of the bearing is prolonged.

[0048] The above has described the embodiments of the present utility model in detail, but the above content is only the preferred embodiments of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made according to the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. A guide wheel device, comprising a guide wheel and a bearing assembly, the guide wheel is arranged on a central shaft, and the central shaft is rotationally connected to the bearing assembly, characterized in that: One end of the central axis where the guide wheel is provided is provided with a limiting boss. The limiting boss is arranged on the side of the guide wheel close to the bearing assembly. One end of the limiting boss close to the bearing assembly is sleeved inside the end of the bearing assembly, so that there is a gap between the guide wheel and the end of the bearing assembly.

2. The guide wheel device according to claim 1, characterized in that: The gap is set to be 3 - 4 mm.

3. According to the guide wheel device as claimed in claim 1 or 2 or the said one, characterized in that: One end of the bearing assembly close to the guide wheel is provided with a cover plate, and the cover plate is sleeved outside the limiting boss.

4. The guide wheel device according to claim 3, wherein: A sealing convex ring is arranged on the side of the limiting boss close to the bearing assembly, and the sealing convex ring is adapted to the end face of the bearing assembly.

5. The guide wheel device according to claim 4, characterized in that: A first groove is arranged on the side of the limiting boss where the sealing convex ring is provided.

6. A guide wheel device according to claim 4, characterized in that: The bearing assembly includes a bearing body. A bearing is arranged inside the bearing body. One end of the central axis away from the guide wheel is connected to the bearing. One end of the bearing body close to the guide wheel is adapted to the sealing convex ring and is detachably connected to the cover plate.

7. The guide wheel device according to claim 6, wherein: A second groove is arranged at one end of the bearing body close to the guide wheel. The second groove is adapted to the sealing convex ring, and there is a gap between the second groove and the sealing convex ring.

8. The guide wheel device according to claim 7, characterized in that: Air inlet holes are arranged in the circumferential direction of the bearing body. Air outlet holes are arranged on the second groove. The air inlet holes are communicated with the air outlet holes, and the air outlet holes are used for blowing air into the gap.

9. A guide wheel device according to any one of claims 1-2, 4-8, characterized in that: A rear cover is arranged at one end of the bearing assembly away from the guide wheel.

10. A tangent machine, characterized in that: There is provided a guide wheel device as described in any one of claims 1 - 9.

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