Spindle adjusting device and bearing superfinishing machine equipped with the device

Abstract

This utility model relates to the field of bearing workpiece processing technology. To facilitate the adjustment of the spindle height of a bearing ultraprecision machine, this utility model proposes a spindle adjustment device and a bearing ultraprecision machine equipped with the device. The spindle adjustment box has spindle mounting holes on its bottom and top plates. In the height adjustment mechanism, the positioning end of the height adjustment screw is installed in the adjustment positioning groove on the bottom plate, and the screwing end of the height adjustment screw passes through the adjustment rotation hole on the top plate. The central axis of the height adjustment screw is parallel to the central axis of the spindle. The spindle sleeve is located inside the spindle adjustment box and fitted onto the spindle. The driving gear is located inside the spindle adjustment box and fitted onto the height adjustment screw, and the driving gear and the height adjustment screw are fixed relative to each other. The driven gear is fitted onto the spindle sleeve and threadedly connected to the spindle sleeve, and the driving gear meshes with the driven gear. Using this utility model's spindle adjustment device to adjust the spindle height is simple and convenient to operate, and provides high precision.

Description

Technical Field

[0001] This utility model relates to the field of bearing workpiece processing technology, and in particular to a spindle adjustment device and a bearing ultraprecision machine equipped with the device. Background Technology

[0002] When using a bearing ultraprecision machine to process bearing outer ring workpieces, it is necessary to ensure the consistency of the system zero position of the bearing ultraprecision machine in order to guarantee the processing accuracy of the bearing outer ring workpieces.

[0003] When machining bearing outer rings on ultra-precision bearing machines, a workpiece drive disc is needed to support and rotate the workpiece. However, the workpiece drive disc will wear down after prolonged use, resulting in height differences.

[0004] Existing ultraprecision bearing machines use either fixed spindles or height-adjustable spindles supported by a pallet. Because the height of fixed spindles is not adjustable, operators typically need to replace the workpiece drive plate and re-zero the machine, a complex and cumbersome process that results in low machining efficiency and high costs for bearing outer rings. For ultraprecision bearing machines using a pallet-supported spindle height adjustment method, the elastic deformation of the pallet during adjustment causes non-linear changes in spindle height, making it difficult to accurately adjust to the desired height, resulting in low adjustment precision. Furthermore, when the spindle is heavy-duty, the required adjustment force is very large, further complicating operator adjustments. Utility Model Content

[0005] To facilitate the adjustment of the spindle height of a bearing ultraprecision machine, this utility model proposes a spindle adjustment device, which includes a spindle adjustment box and a height adjustment mechanism. The bottom plate and top plate of the spindle adjustment box are provided with spindle mounting holes for mounting the spindle. The height adjustment mechanism includes a height adjustment screw, a main shaft sleeve, a drive gear, and a driven gear. The positioning end of the height adjustment screw is installed in the adjustment positioning groove on the base plate, and the screwing end of the height adjustment screw passes through the adjustment rotation hole on the top plate. The central axis of the height adjustment screw is parallel to the central axis of the main shaft. The main shaft sleeve is located inside the main shaft adjustment box and is sleeved on the main shaft. The drive gear is located inside the main shaft adjustment box and is sleeved on the height adjustment screw, and the drive gear is fixed relative to the height adjustment screw. The driven gear is sleeved on the main shaft sleeve and threadedly connected to the main shaft sleeve, and the drive gear meshes with the driven gear.

[0006] When adjusting the height of the spindle in a bearing ultraprecision machine using the spindle adjustment device of this invention, the operator only needs to rotate the height adjustment screw. This screw drives the drive gear to rotate, which in turn drives the driven gear, which is fitted onto the spindle sleeve and threadedly connected to it. This, in turn, causes the spindle sleeve, threadedly connected to the driven gear, to move up and down, thus adjusting the spindle height. Therefore, adjusting the spindle height of a bearing ultraprecision machine using the spindle adjustment device of this invention is simple and convenient. Furthermore, because the driven gear and the spindle sleeve are threadedly connected, the spindle height of the bearing ultraprecision machine can be steplessly adjusted with high precision.

[0007] Preferably, both the driving gear and the driven gear are located close to the bottom plate of the spindle adjustment box. A driving limit cover is pressed onto the driving gear, and a driven limit cover is pressed onto the driven gear. This allows the driving and driven limit covers to cooperate with the bottom plate of the spindle adjustment box to form a movement space for the driving and driven gears, preventing them from moving up or down with the spindle during height adjustment, or even misalignment, which would affect adjustment efficiency. Furthermore, the driving and driven limit covers are fixed to the bottom plate by limit bolts. This simple and convenient method of fixing the driving and driven limit covers with limit bolts is advantageous. More preferably, the driving limit cover has an adjustment through hole for inserting the height adjustment screw. An oil-free bushing is installed in this adjustment through hole and fitted onto the height adjustment screw. In this way, when rotating the height adjusting screw, the wear between the height adjusting screw and the corresponding position of the active limit cover can be reduced, extending the service life of the height adjusting screw and the active limit cover, thereby extending the service life of the spindle adjusting device of this utility model.

[0008] Preferably, the height adjusting screw is engaged and fixed to the drive gear, and the height adjusting screw is provided with an annular tray to support the drive gear. This avoids the drive gear directly pressing against the base plate of the spindle adjusting box, reducing the force required to rotate the height adjusting screw, reducing energy consumption for adjustment, and preventing wear on the drive gear, thus extending its service life. Furthermore, a positioning groove is provided on the side wall of the height adjusting screw, and a locking groove is provided on the inner side of the drive gear. A locking block is installed in the positioning groove, with one end of the locking block away from the height adjusting screw locked in the locking groove. Thus, by using the locking block in the positioning groove on the height adjusting screw to engage with the locking groove on the drive gear, the drive gear and the height adjusting screw are relatively fixed, resulting in a simple structure and stable engagement.

[0009] Preferably, the spindle adjustment device includes a locking mechanism, which comprises a locking element and a locking bolt. The locking element is located at the bottom of the spindle adjustment box and surrounds the spindle sleeve. The locking bolt extends from the side wall of the spindle adjustment box into the spindle adjustment box and connects with the locking element to lock or release the locking element. Thus, when using a bearing ultra-precision machine equipped with this spindle adjustment device to perform ultra-precision machining on bearing outer ring workpieces, the locking element can be used to lock the spindle sleeve. This allows the spindle adjustment box to be relatively fixed to the spindle using the locking element and the locking bolt extending from the side wall of the spindle adjustment box, preventing abnormal noise or even detachment from the spindle during rotation due to inconsistent rotation speeds. This would affect the service life of the spindle adjustment device. Furthermore, a sector-shaped locking plate is provided on the base plate of the spindle adjusting box. This sector-shaped locking plate is coaxial with the spindle and holds the spindle sleeve. An adjustment through hole for mounting the locking bolt is provided laterally on the base plate. The free end of the sector-shaped locking plate has a locking screw hole for connecting with the locking bolt. The locking bolt passes through the adjustment through hole and is threadedly connected to the sector-shaped locking plate. A locking nut is provided on the adjusting end of the locking bolt located outside the base plate. Thus, by using the sector-shaped locking plate on the base plate of the spindle adjusting box and the threaded connection of the adjusting bolt passing through the adjustment through hole on the base plate, simply rotating the adjusting bolt can lock the base plate of the spindle adjusting box and the spindle sleeve in place, thereby fixing the spindle adjusting box relative to the spindle. In addition, the locking nut on the adjusting end of the locking bolt located outside the base plate allows the operator to simply tighten the locking nut, making operation simple and convenient.

[0010] Preferably, the spindle adjustment device includes a radial limiting mechanism, which comprises a limiting bearing and a limiting sleeve. The limiting bearing and the limiting sleeve are located in the spindle adjustment box and sleeved on the spindle sleeve, with the limiting bearing sandwiched between the spindle sleeve and the limiting sleeve. A limiting key is provided on the outer wall of the limiting sleeve, and the limiting key is engaged in a limiting keyway on the spindle adjustment box. Thus, during adjustment, the radial limiting mechanism can be used to radially limit the spindle, preventing radial deviation of the spindle and potentially affecting the operation of the bearing ultraprecision machine.

[0011] Furthermore, this utility model proposes a bearing ultraprecision machine equipped with any of the aforementioned spindle adjustment devices. Thus, by incorporating the aforementioned spindle adjustment device into the bearing ultraprecision machine, the adjustment operation is simple and convenient, and the adjustment accuracy is high. Attached Figure Description

[0012] Figure 1 This is a first-view structural schematic diagram of the spindle adjustment device of this utility model; Figure 2 for Figure 1 A schematic diagram of the AA cross-sectional structure in the diagram; Figure 3 for Figure 2 A magnified diagram of Q in the image; Figure 4 for Figure 1 Schematic diagram of the BB cross-sectional structure in the middle; Figure 5 for Figure 1 Schematic diagram of the CC cross-section structure in the diagram; Figure 6 This is a second-view structural schematic diagram of the spindle adjustment device of this utility model. Detailed Implementation

[0013] Below, in conjunction with Figures 1 to 6 This paper provides a detailed description of the spindle adjustment device of this utility model and the bearing ultraprecision machine equipped with the device.

[0014] like Figures 1 to 4As shown, the spindle adjustment device of this utility model includes a spindle adjustment box and a height adjustment mechanism. The bottom plate 11 and top plate 12 of the spindle adjustment box 1 are provided with spindle mounting holes (not shown in the figure) for mounting the spindle 2. The height adjustment mechanism includes a height adjustment screw 31, a spindle sleeve 32, a drive gear 33, and a driven gear 34. The positioning end of the height adjustment screw 31 is installed in the adjustment positioning groove 111 on the bottom plate of the spindle adjustment box 1. The screwing end of the height adjustment screw 31 passes through the adjustment rotation hole (not shown in the figure) on the top plate 12 of the spindle adjustment box 1, and the central axis of the height adjustment screw 31 is parallel to the central axis of the spindle 2. The spindle sleeve 32 is installed in the spindle adjustment box 1 and sleeved on the spindle 2. The drive gear 33 is located in the spindle adjustment box 1 and sleeved on the height adjustment screw 31, and the drive gear 33 is fixed relative to the height adjustment screw 31. The driven gear 34 is sleeved on the spindle sleeve and threadedly connected to the spindle sleeve 32, and the drive gear 33 meshes with the driven gear. Preferably, a positioning protrusion 321 is provided on the outer wall of the spindle sleeve 32, and the positioning protrusion 321 is engaged in a positioning groove (not shown in the figure) on the spindle adjustment box 1. This prevents misalignment between the spindle sleeve 32 and the spindle 2 and the spindle adjustment box 1, thus avoiding affecting the use of the spindle adjustment device of this invention. Preferably, both the drive gear 33 and the drive gear 34 are close to the bottom plate 11 of the spindle adjustment box 1. A drive limiting cover 35 is pressed onto the drive gear 33, and a driven limiting cover 36 is pressed onto the driven gear 34. This allows the drive limiting cover 35 and the driven limiting cover 36 to cooperate with the bottom plate 11 of the spindle adjustment box 1 to form a movement space for the drive gear 33 and the driven gear 34, preventing the drive gear 33 and the driven gear 34 from moving up or down with the spindle 2 during the height adjustment process, or even misalignment, which would affect the adjustment efficiency. Preferably, the active limiting cover 35 and the driven limiting cover 36 are fixed to the base plate 11 by limiting bolts (not shown in the figure). This method of fixing the active limiting cover 35 and the driven limiting cover 36 with limiting bolts is simple and convenient. Preferably, the active limiting cover 35 is provided with an adjusting through hole (not shown in the figure) for inserting a height adjusting screw 31. An oil-free bushing 37 is installed in this adjusting through hole, and the oil-free bushing 37 is fitted onto the height adjusting screw 31. This reduces wear on the corresponding position of the height adjusting screw 31 and the active limiting cover 35 when the height adjusting screw 31 is rotated, extending the service life of the height adjusting screw 31 and the active limiting cover 35, thereby extending the service life of the spindle adjusting device of this invention. Preferably, the height adjusting screw 31 is engaged and fixed with the driving gear 33, and the height adjusting screw 31 is provided with an annular tray 311 for supporting the driving gear 33. This avoids the drive gear 33 from being directly pressed onto the base plate 11 of the main shaft adjustment box 1, which reduces the force required to rotate the height adjustment screw 31, reduces the energy consumption required for adjustment, and also avoids wear on the drive gear 33, thus extending its service life.Preferably, a positioning groove 312 is provided on the side wall of the height adjusting screw 31, and a locking groove 331 is provided on the inner side of the drive gear 33. A locking block 38 is installed in the positioning groove 312, and the end of the locking block 38 away from the height adjusting screw 31 is locked in the locking groove 331. In this way, by using the locking block 38 installed in the positioning groove 312 on the height adjusting screw 31 to lock with the locking groove 331 on the drive gear 33, the drive gear 33 and the height adjusting screw 31 are relatively fixed, resulting in a simple structure and stable locking.

[0015] like Figures 1 to 6 As shown, the spindle adjustment device of this utility model includes a locking mechanism, which includes a locking element (not shown in the figure) and a locking bolt 41. The locking element is located at the bottom of the spindle adjustment box 1 and surrounds the spindle sleeve 32. The locking bolt 41 extends from the side wall 13 of the spindle adjustment box 1 into the spindle adjustment box 1 and connects with the locking element to lock or loosen the locking element. In this way, when using a bearing ultra-precision machine equipped with the spindle adjustment device of this utility model to perform ultra-precision machining on bearing outer ring workpieces, the locking element can be used to lock the spindle sleeve 32. Thus, the locking element and the locking bolt 41 extending from the side wall 13 of the spindle adjustment box 1 can be used to fix the spindle adjustment box 1 relative to the spindle 2, avoiding abnormal noise failures caused by the spindle adjustment box 41 rotating at different speeds than the spindle 2 during the rotation of the spindle 2, or even falling off the spindle 2, which would affect the service life of the spindle adjustment device of this utility model. Preferably, a sector-shaped locking plate 112 is provided on the base plate 11 of the spindle adjusting box 1. The sector-shaped locking plate 112 is coaxial with the spindle 2 and holds the spindle sleeve 32. An adjustment through hole (not shown in the figure) for installing the locking bolt 41 is provided laterally on the base plate 11. The free end of the sector-shaped locking plate 112 is provided with a locking screw hole (not shown in the figure) for connecting with the locking bolt 41. The locking bolt 41 passes through the adjustment through hole and is threadedly connected to the sector-shaped locking plate 112. A locking nut 42 is provided on the adjustment end of the locking bolt 41 located outside the base plate 11. In this way, by using the sector-shaped locking plate 112 on the base plate 11 of the spindle adjusting box 1 and the adjustment bolt 41 threadedly connected in the adjustment through hole on the base plate 11, the base plate 11 of the spindle adjusting box 1 and the spindle sleeve 32 can be locked and fixed by simply rotating the adjustment bolt 41, thereby fixing the spindle adjusting box 1 and the spindle 2 relative to each other. In addition, a locking nut 42 is provided on the adjusting end of the locking bolt 41 located outside the base plate 11. The operator only needs to tighten the locking nut 42, which is simple and convenient to operate.

[0016] like Figure 1 and 2As shown, the spindle adjustment device of this utility model includes a radial limiting mechanism, which includes a limiting bearing 51 and a limiting sleeve 52. The limiting bearing 51 and the limiting sleeve 52 are located in the spindle adjustment box 1 and are sleeved on the spindle sleeve 32, with the limiting bearing 51 sandwiched between the spindle sleeve 32 and the limiting sleeve 52. A limiting key 521 is provided on the outer wall of the limiting sleeve 52, and the limiting key 521 is engaged in the limiting keyway (not shown in the figure) on the spindle adjustment box 1. In this way, during the adjustment process, the radial limiting mechanism can be used to radially limit the spindle 2, avoiding radial displacement of the spindle 2, and even affecting the use of the bearing ultra-precision machine. Preferably, the limiting key 521 is located in the middle of the limiting sleeve 52 and extends along the axial direction of the limiting sleeve 52. This not only facilitates the machining of the limiting key 521 on the limiting sleeve 52, reducing machining costs, but also allows for the extension of the length of the limiting key 521 as much as possible, thereby improving the radial limiting stability of the radial limiting mechanism.

[0017] When adjusting the height of the spindle, especially the heavy-duty spindle, in a bearing ultraprecision machine using the spindle adjustment device of this invention, the operator only needs to rotate the height adjustment screw 31. This screw 31 drives the drive gear 33 to rotate, which in turn drives the driven gear 34, which is sleeved on and threadedly connected to the spindle sleeve 32, to rotate. This, in turn, causes the spindle sleeve 32, which is threadedly connected to the driven gear 34, to move up and down, thereby adjusting the height of the spindle 2. Therefore, adjusting the height of the spindle 2 in a bearing ultraprecision machine using the spindle adjustment device of this invention is simple and convenient. Furthermore, because the driven gear 34 and the spindle sleeve 32 are threadedly connected, the height of the spindle 2 of the bearing ultraprecision machine can be steplessly adjusted with high precision.

Claims

1. A spindle adjustment device, characterized in that The spindle adjustment device includes a spindle adjustment box and a height adjustment mechanism. The bottom plate and top plate of the spindle adjustment box are provided with spindle mounting holes for installing the spindle. The height adjustment mechanism includes a height adjustment screw, a main shaft sleeve, a drive gear, and a driven gear. The positioning end of the height adjustment screw is installed in the adjustment positioning groove on the base plate, and the screwing end of the height adjustment screw passes through the adjustment rotation hole on the top plate. The central axis of the height adjustment screw is parallel to the central axis of the main shaft. The main shaft sleeve is located inside the main shaft adjustment box and is sleeved on the main shaft. The drive gear is located inside the main shaft adjustment box and is sleeved on the height adjustment screw, and the drive gear is fixed relative to the height adjustment screw. The driven gear is sleeved on the main shaft sleeve and threadedly connected to the main shaft sleeve, and the drive gear meshes with the driven gear.

2. The spindle adjustment device of claim 1, wherein, Both the drive gear and the driven gear are close to the bottom plate of the main shaft adjustment box. The drive gear is covered with a drive limiting cover, and the driven gear is covered with a driven limiting cover.

3. The spindle adjustment device of claim 2, wherein, The active limiting cover and the driven limiting cover are fixed to the base plate by limiting bolts.

4. The spindle adjustment device of claim 3, wherein, The active limiting cover is provided with an adjustment through hole for inserting the height adjustment screw. An oil-free bushing is installed in the adjustment through hole and is sleeved on the height adjustment screw.

5. Spindle adjustment device according to any one of claims 1 to 4, characterized in that The height adjusting screw is engaged and fixed with the drive gear, and the height adjusting screw is provided with an annular tray to support the drive gear.

6. The spindle adjustment device of claim 5, wherein, The height adjusting screw has a positioning groove on its side wall, and the drive gear has a snap-fit ​​groove on its inner side. A snap-fit ​​block is installed in the positioning groove, and the end of the snap-fit ​​block away from the height adjusting screw is snapped into the snap-fit ​​groove.

7. The spindle adjustment device according to any one of claims 1 to 4, characterized in that The spindle adjustment device includes a locking mechanism, which includes a locking member and a locking bolt. The locking member is located at the bottom of the spindle adjustment box and surrounds the spindle sleeve. The locking bolt extends from the side wall of the spindle adjustment box into the spindle adjustment box and is connected to the locking member for locking or releasing the locking member.

8. The spindle adjustment device of claim 7, wherein, The base plate of the spindle adjusting box is provided with a sector-shaped locking plate, which is coaxial with the spindle and holds the spindle sleeve. The base plate is provided with an adjusting through hole for installing the locking bolt. The free end of the sector-shaped locking plate is provided with a locking screw hole for connecting with the locking bolt. The locking bolt passes through the adjusting through hole and is threadedly connected to the sector-shaped locking plate. A locking nut is provided on the adjusting end of the locking bolt located outside the base plate.

9. The spindle adjustment device according to any one of claims 1-4, characterized in that The spindle adjustment device includes a radial limiting mechanism, which includes a limiting bearing and a limiting sleeve. The limiting bearing and the limiting sleeve are located in the spindle adjustment box and are sleeved on the spindle sleeve. The limiting bearing is sandwiched between the spindle sleeve and the limiting sleeve. A limiting key is provided on the outer wall of the limiting sleeve, and the limiting key is engaged in the limiting keyway on the spindle adjustment box.

10. A bearing superfinishing machine characterized by, The bearing ultraprecision machine is equipped with the spindle adjustment device as described in any one of claims 1-9.

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