High-precision rotary supporting mechanism

Abstract

The utility model discloses a high-precision rotary supporting mechanism which is characterized in that a supporting disc is fixed on a machine frame, a lower tray is arranged above the supporting disc, an annular oil cavity is formed in the upper end of the supporting disc, the lower tray is provided with a sliding ring matched with the annular oil cavity, a lower disc is fixed above the lower tray, and the supporting disc is rotationally connected with a transmission shaft in the machine frame. A flat key is arranged between the lower tray and the transmission shaft, and the lower tray slides up and down along the transmission shaft through the flat key. Compared with the prior art, the sliding ring supporting structure does not need to be rotationally supported through a bearing, the annular oil cavity is used for supporting the sliding ring capable of freely moving up and down, and the supporting structure is low in machining difficulty and easy to assemble. And secondly, the contact area of the slip ring and the annular oil cavity is large, so that the friction loss can be effectively reduced. And thirdly, lubricating oil can be uniformly distributed in the annular oil cavity, and when the slip ring rotates, a uniform oil film is formed in the annular oil cavity, so that the slip ring has lubricity and shock absorption, meets the high-precision rotation requirement, and is beneficial to improving the stability of equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a polishing machine lower disc supporting technical field especially a kind of high-precision rotary support mechanism. BACKGROUND

[0002] At present, the supporting structure of the lower disc of traditional grinding and polishing machine adopts angular contact bearing, thrust ball bearing plus needle bearing or adopts angular contact bearing plus deep groove ball bearing to support, there is the problem of big friction loss, uneven lubrication, bearing component wear is easily caused, in turn affect the precision and service life of equipment.In addition, the machining precision of bearing to installation cooperation surface is higher, leading to high processing difficulty, large assembly cost. SUMMARY

[0003] The utility model provides a kind of high-precision rotary support mechanism, to solve the problem of big friction loss, uneven lubrication and big processing difficulty of the supporting structure of existing bearing.

[0004] The utility model provides a kind of high-precision rotary support mechanism, fixed on the support disc of rack, the upper of support disc is equipped with lower tray, the upper end of support disc is equipped with annular oil cavity, the lower tray is equipped with the sliding ring that is matched with annular oil cavity, the upper of lower tray is fixed with lower disc, support disc is rotatably connected with transmission shaft in rack, flat key is equipped between lower tray and transmission shaft, lower tray slides up and down along transmission shaft by flat key.

[0005] Preferably, the upper end of the support disc is provided with a first groove, the first groove is arranged between the transmission shaft and the annular oil cavity, and an overflow groove is communicated between the first groove and the annular oil cavity.

[0006] Preferably, the lower side of the support disc is fixed with an oil cylinder body, an oil outlet groove is arranged on the oil cylinder body, and the oil outlet groove is communicated with the first groove through the support disc.

[0007] Preferably, an oil inlet groove is arranged on the oil cylinder body, the oil inlet groove is communicated with an oil pipe in the first groove through the support disc, and the oil pipe is communicated with the annular oil cavity.

[0008] Preferably, the oil outlet groove is vertically arranged in the oil cylinder body, and the oil outlet groove is obliquely arranged in the support disc.

[0009] Preferably, the oil inlet groove is vertically arranged in the oil cylinder body, and the oil inlet groove is obliquely arranged in the support disc.

[0010] Preferably, the bottom of the annular oil cavity is provided with two second grooves, and the two second grooves are respectively arranged on the two sides of the sliding ring.

[0011] Preferably, the lower end of the lower tray is provided with a third groove, the cavity wall of the annular oil cavity extends into the third groove, the upper end of the support surrounding plate on the frame extends into the third groove, and a sealing element is arranged between the support surrounding plate and the lower tray.

[0012] Preferably, the sealing element is fixed on the support surrounding plate.

[0013] Preferably, the oil cylinder body is fixed with the main shaft support plate through bolts, and the main shaft support plate is arranged below the oil cylinder body.

[0014] Compared with the prior art, the utility model does not need to be supported in rotation through the bearing, but is supported by the annular oil cavity to the sliding ring that can move up and down freely, the supporting structure is low in processing difficulty and is easy to assemble. Secondly, the contact area of the sliding ring and the annular oil cavity is large, and the friction loss can be effectively reduced. Thirdly, the lubricating oil can be uniformly distributed in the annular oil cavity, and when the sliding ring rotates, the uniform oil film is formed in the annular oil cavity, has lubricity and shock absorption, satisfies the high-precision rotation requirement, and is favorable to improving the equipment stability. Fourthly, the bearing capacity of the supporting mechanism provided by the utility model is proportional to the rotational speed, and greater load can be borne at high speed, and the grinding and polishing efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0016] Figure 1 It is a sectional view schematic diagram of the utility model at the place of passing through the key;

[0017] Figure 2 It is a sectional view schematic diagram of the utility model at the place of passing through the oil inlet groove;

[0018] Figure 3 It is a sectional view schematic diagram of the utility model at the place of passing through the oil outlet groove.

[0019] Reference signs:

[0020] 1. Frame, 2. Support disc, 3. Lower tray, 4. Lower disc, 5. Transmission shaft, 6. Oil cylinder body, 7. Support surrounding plate, 8. Sealing element, 9. Main shaft support plate, 21. Annular oil cavity, 22. First groove, 23. Second groove, 24. Overflow groove, 31. Sliding ring, 32. Third groove, 100. Oil outlet groove, 200. Oil inlet groove, 300. Key. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme in the utility model will be clearly and completely described in combination with the drawings in the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Referring to the drawings Figure 1 The embodiment provides a high-precision rotary supporting mechanism, a supporting disc 2 is fixed on a rack 1, a lower tray 3 is arranged above the supporting disc 2, an annular oil cavity 21 is arranged at the upper end of the supporting disc 2, lubricating oil is arranged in the annular oil cavity 21, the lower tray 3 is provided with a sliding ring 31 matched with the annular oil cavity 21, a lower disc 4 is fixed above the lower tray 3, the supporting disc 2 is rotationally connected with a transmission shaft 5 in the rack 1, the transmission shaft 5 can rotate in the rack 1, a flat key 300 is arranged between the lower tray 3 and the transmission shaft 5, and the lower tray 3 slides up and down along the transmission shaft 5 through the flat key 300. In the utility model, when the lower tray 3 slides downward along the transmission shaft 5 through the flat key 300, the annular oil cavity 21 supports the sliding ring 31 falling into the annular oil cavity 21, and the arrangement of the annular oil cavity 21 can ensure that the lubricating oil is uniformly distributed. The transmission shaft 5 drives the lower tray 3 to rotate, when the sliding ring 31 rotates in the annular oil cavity 21, a uniform oil film can be formed in the cavity, the lubricating property and the shock absorption property are good, the high-precision rotation requirement is met, and the equipment stability is improved. The supporting mechanism provided by the utility model has a bearing capacity proportional to the rotation speed, can bear greater load at high speed, and effectively improves the grinding and polishing efficiency.

[0023] One embodiment of oil discharge of the annular oil cavity 21: the upper end of the supporting disc 2 is provided with a first groove 22, the first groove 22 is arranged between the transmission shaft 5 and the annular oil cavity 21, the first groove 22 is communicated with the annular oil cavity 21 through an overflow groove 24, the overflow groove 24 is arranged on the cavity wall of the annular oil cavity 21, and the excess lubricating oil in the annular oil cavity 21 flows to the first groove 22 through the overflow groove 24 and then is discharged from the first groove 22. Specifically, six overflow grooves 24 are uniformly distributed on the annular oil cavity 21.

[0024] As another embodiment of the utility model: referring to the drawings Figure 3 The lower portion of the supporting disc 2 is fixed with an oil cylinder body 6, the oil cylinder body 6 is provided with an oil outlet groove 100, the oil outlet groove 100 penetrates through the supporting disc 2 and is communicated with the first groove 22, and the lubricating oil in the first groove 22 is discharged through the oil outlet groove 100.

[0025] One embodiment of oil inlet of the annular oil cavity 21: referring to the drawings Figure 2The oil cylinder body 6 is provided with an oil inlet groove 200, the oil inlet groove 200 is communicated with the oil pipe in the first groove 22 through the support disc 2, and the oil pipe is communicated with the annular oil cavity 21.

[0026] As another embodiment of the utility model: the oil outlet groove 100 is vertically arranged in the oil cylinder body 6, and the oil outlet groove 100 is obliquely arranged in the support disc 2.

[0027] As another embodiment of the utility model: the oil inlet groove 200 is vertically arranged in the oil cylinder body 6, and the oil inlet groove 200 is obliquely arranged in the support disc 2.

[0028] As another embodiment of the utility model: the bottom of the annular oil cavity 21 is provided with two second grooves 23, the two second grooves 23 are arranged at the two sides of the sliding ring 31 respectively, and the distance between the sliding ring 31 and the cavity wall of the annular oil cavity 21 is greater than the groove width of the second groove 23.

[0029] As another embodiment of the utility model: the lower end of the lower tray 3 is provided with a third groove 32, the cavity wall of the annular oil cavity 21 extends into the third groove 32, the upper end of the support fence 7 on the rack 1 extends into the third groove 32, and the sealing element 8 is arranged between the support fence 7 and the lower tray 3. The sealing element 8 can effectively prevent dust outside from entering the annular oil cavity 21.

[0030] One mounting mode of the sealing element 8: the sealing element 8 is fixed on the support fence 7.

[0031] As another embodiment of the utility model: the oil cylinder body 6 is fixed through bolts with the main shaft support plate 9, the main shaft support plate 9 is arranged below the oil cylinder body 6, the support fence 7 is arranged outside the oil cylinder body 6, the support disc 2 is fixed on the oil cylinder body 6 through bolts, and the lower tray 3 is fixed with the lower disc 4 through bolts.

[0032] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A high-precision rotary support mechanism, characterized in that, The support disc is fixed on the frame, and a lower tray is arranged above the support disc, and an annular oil cavity is arranged at the upper end of the support disc, and the lower tray is provided with a slip ring matched with the annular oil cavity, and a lower disc is fixed above the lower tray, and the support disc is rotationally connected with a transmission shaft in the frame, and a flat key is arranged between the lower tray and the transmission shaft, and the lower tray slides up and down along the transmission shaft through the flat key.

2. The high precision rotary support mechanism according to claim 1, wherein The upper end of the support disc is provided with a first groove, and the first groove is arranged between the transmission shaft and the annular oil cavity, and an overflow groove is in communication between the first groove and the annular oil cavity.

3. The high precision rotary support mechanism according to claim 2, wherein The oil cylinder body is fixed below the support disc, and an oil outlet groove is arranged on the oil cylinder body, and the oil outlet groove is in communication with the first groove through the support disc.

4. The high precision rotary support mechanism according to claim 3, wherein An oil inlet groove is arranged on the oil cylinder body, and the oil inlet groove is in communication with an oil pipe in the first groove through the support disc, and the oil pipe is in communication with the annular oil cavity.

5. The high precision rotary support mechanism according to claim 3, wherein The oil outlet groove is vertically arranged in the oil cylinder body, and the oil outlet groove is obliquely arranged in the support disc.

6. The high precision rotary support mechanism according to claim 4, wherein The oil inlet groove is vertically arranged in the oil cylinder body, and the oil inlet groove is obliquely arranged in the support disc.

7. The high precision rotary support mechanism according to claim 1, wherein The bottom of the annular oil cavity is provided with two second grooves, and the two second grooves are respectively arranged on the two sides of the slip ring.

8. The high precision rotary support mechanism according to claim 1, wherein The lower end of the lower tray is provided with a third groove, the outer cavity wall of the annular oil cavity extends into the third groove, the support surrounding plate on the frame extends into the third groove, and a sealing element is arranged between the support surrounding plate and the lower tray.

9. The high precision rotary support mechanism according to claim 8, wherein The sealing element is fixed on the support surrounding plate.

10. The high precision rotary support mechanism according to claim 3, wherein The oil cylinder body is fixed on the main shaft support plate through bolts, and the main shaft support plate is arranged below the oil cylinder body.

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