Special fixture for grinding bearing outer ring

Abstract

The utility model relates to the technical field of bearing grinding, in particular to a special fixture for bearing outer ring grinding, which comprises a base and a correction component arranged on the outer side of the base, a bearing is connected with the base, the correction component comprises a plurality of groups of movable plates, the movable plates are uniformly distributed on the outer side of the base, and each movable plate comprises a support plate and a movable pressing plate. The movable pressing plate and the supporting plate are arranged in parallel, the distance between the movable pressing plate and the supporting plate is adjustable, the supporting plate is connected to the lower end of the bearing, and the movable pressing plate is connected to the upper end of the bearing. And multiple positions of the bearing can be stably attached to the lower end of the base, the bearing is prevented from inclining in the installation process, and the grinding precision and the service life of the bearing are guaranteed to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of bearing grinding technology, and in particular to a special fixture for grinding bearing outer rings. Background Technology

[0002] During the repair of helicopter gearboxes and engines, the problem of out-of-tolerance fit between the casing and the bearing outer ring often occurs. The repair method is generally to grind and chrome-plat the bearing outer ring to restore the fit between the casing and the bearing, thus achieving rapid repair.

[0003] The reducer and engine use ball bearings. For ball bearings, machining accuracy is one of the main indicators affecting their service life. Proper clamping methods are very important during repair. Because the outer ring raceway of the ball bearing has an arc-shaped structure, the existing clamping method is to directly put the bearing on the cylindrical support without an internal clamping structure. The bearing is prone to tilting on the cylindrical support, which is difficult to observe. During the grinding process, the bearing will run around, which can easily lead to bearing deformation, affecting the bearing accuracy and service life. Utility Model Content

[0004] In view of the technical problems existing in the background art, the purpose of this utility model is to provide a special fixture for grinding bearing outer rings, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A special fixture for grinding the outer ring of a bearing includes a base and a correction assembly disposed on the outside of the base. The bearing is connected to the base. The correction assembly includes several sets of movable plates evenly distributed on the outside of the base. Each movable plate includes a support plate and a movable pressure plate. The movable pressure plate and the support plate are arranged in parallel, and the distance between the movable pressure plate and the support plate is adjustable. The support plate is connected to the lower end of the bearing, and the movable pressure plate is connected to the upper end of the bearing.

[0007] Preferably, the movable plate also includes a column, which is disposed between the support plate and the movable pressure plate. A limit block is provided on the column, one end of the column passes through the movable pressure plate, and the lower end of the movable pressure plate is supported on the limit block.

[0008] Preferably, the movable plate also includes a positioning screw, which is disposed between the movable pressure plate and the support plate, and is arranged parallel to the column.

[0009] Preferably, the movable pressure plate is provided with a channel, the positioning screw and the column are respectively arranged in the channel, and one end of the positioning screw extends out of the channel, and one end of the column extends out of the channel.

[0010] Preferably, a nut is provided on the positioning screw through a threaded engagement, and the nut is connected to the upper end of the movable pressure plate and is pressed against the movable pressure plate.

[0011] Preferably, the base is provided with a plurality of connection holes I, and the support plate is provided with connection holes II. The connection holes I and connection holes II are aligned, and bolts are detachably provided in the connection holes I and connection holes II.

[0012] Preferably, a mounting shaft is provided in the middle of the base, the mounting shaft and the bearing are concentrically arranged, a mounting plate is detachably provided on the mounting shaft, and a plurality of protruding plates are provided on the mounting plate, the protruding plates abutting against the upper end of the bearing.

[0013] Preferably, the mounting plate is provided with a slot, the mounting shaft is connected in the slot, and a clamping block is slidably provided on the mounting shaft, the clamping block being connected at the upper end of the mounting plate.

[0014] This utility model has the following advantages and beneficial effects:

[0015] In this invention, an adjustable movable pressure plate is provided on the outer side of the bearing. If the bearing tilts on the base, the movable pressure plate at the corresponding position can be slowly adjusted so that the movable pressure plate presses the bearing firmly onto the base. By adjusting several movable pressure plates in the above manner, multiple positions of the bearing can be stably fitted against the lower end of the base, preventing the bearing from tilting during installation and preventing the bearing from being damaged by sudden large pressure. A mounting plate is provided at the upper end of the bearing, which presses the bearing stably onto the base, keeping the bearing stable during grinding and preventing the bearing from jumping during grinding, which could lead to bearing deformation. This maximizes the grinding accuracy and bearing life. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a special fixture for grinding bearing outer rings proposed in this utility model;

[0017] Figure 2 This is a schematic diagram showing the connection between the base and the correction assembly of a special fixture for grinding bearing outer rings according to this utility model;

[0018] Figure 3 This is a schematic diagram of the support structure of a special fixture for grinding bearing outer rings proposed in this utility model;

[0019] Reference numerals: 1-Bearing, 2-Base, 21-Connecting hole I, 22-Mounting shaft, A-Moving plate, 3-Support, 31-Connecting hole II, 32-Support plate, 321-Hole I, 322-Hole II, 4-Moving pressure plate, 41-Slot, 5-Column, 51-Limiting block, 52-Positioning nut I, 6-Positioning screw, 61-Positioning nut II, 62-Nut, 7-Mounting plate, 71-Slot, 72-Protruding plate, 8-Clamping block. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] Example

[0023] like Figures 1-3 As shown, a special fixture for grinding the outer ring of a bearing includes a base 2 and a correction assembly disposed on the outside of the base 2. The bearing 1 is connected to the base 2. The base 2 has a circular structure and is disposed on the inner wall of the bearing 1. The bearing 1 is sleeved on the base 2. The correction assembly includes several sets of movable plates A and a support 3. The movable plates A are disposed on the support 3. The several sets of movable plates A are evenly distributed on the outside of the base 2. The movable plates A are used to press multiple positions of the bearing 1. At least three sets of movable plates A are provided. If three sets of movable plates A are provided, the movable plates A are distributed at 120° to each other. The several movable plates A are arranged in a ring shape, and the distance between adjacent movable plates A is the same.

[0024] like Figures 1-3As shown, the movable plate A includes a positioning screw 6, a column 5, and a movable pressure plate 4. A support member 3 is located at the lower end of the base 2. The movable pressure plate 4 and the support plate 32 are arranged parallel to each other. Several support plates 32 are provided on the support member 3, and the support plates 32 and the movable pressure plate 4 are aligned. The distance between the movable pressure plate 4 and the support plates 32 is adjustable. The column 5 is located between the support plate 32 and the movable pressure plate 4. The movable pressure plate 4 has a channel 41. The positioning screw 6 and the column 5 are respectively located within the channel 41, with one end of the positioning screw 6 extending from the channel 41 and one end of the column 5 extending from the channel 41. A limit block 51 is provided on the column 5, and one end of the column 5 passes through the movable pressure plate 4. The lower end of the movable pressure plate 4 is supported by the limit block 51. On the 1st, the position of the limiting block 51 is set according to the width of the bearing 1. Specifically, the support plate 32 is provided with a hole I 321, and the lower end of the column 5 has a positioning nut I 52. The column 5 is inserted into the hole I 321, and the column 5 and the hole I 321 can be fixed by threaded connection. When the positioning nut I 52 is connected to the surface of the support plate 32, and the movable pressure plate 4 is supported on the limiting block 51, one end of the movable pressure plate 4 is in contact with the upper end of the bearing 1. The positioning nut I 52 ensures that each column 5 maintains the same length on different support plates 32, preventing the column 5 from having inconsistent heights during installation. The column 5 not only supports the movable pressure plate 4, but also positions the movable pressure plate 4. The positioning screw 6 is positioned between the movable pressure plate 4 and the support plate 32. The positioning screw 6 is parallel to the column 5. The connection method between the positioning screw 6 and the support plate 32 is the same as the connection method between the column 5 and the support plate 32. Specifically, the support plate 32 is provided with a hole II 322, and the lower end of the positioning screw 6 is provided with a positioning nut II 61. The positioning screw 6 is inserted into the hole II 322. The positioning screw 6 and the hole II 322 can be fixed by threaded connection. The positioning nut II 61 ensures that each positioning screw 6 maintains the same length on different support plates 32, preventing inconsistent heights of the positioning screw 6 during installation. A nut 62 is threaded onto the positioning screw 6. The nut 62 slides on the positioning screw 6. When the positioning nut 61 and the support plate 32 are in contact, the nut 62 is screwed into the positioning screw 6, so that the nut 62 is connected to the upper end of the movable pressure plate 4 and pressed against the movable pressure plate 4. The nut 62 presses the movable pressure plate 4 tightly against the upper end of the bearing 1. If the bearing 1 is tilted on the base 2, the movable pressure plate 4 at the corresponding position can be slowly adjusted so that the movable pressure plate 4 presses the bearing 1 tightly against the base 2. By adjusting several movable pressure plates 4 in the above manner, multiple positions of the bearing 1 can be stably attached to the lower end of the base 2, preventing the bearing 1 from tilting during installation and preventing the bearing 1 from being damaged by a large pressure at any moment.

[0025] like Figures 1-3As shown, the base 2 is provided with several connecting holes I21, and the support 3 is provided with connecting holes II31. The connecting holes I21 and II31 are aligned. Bolts are detachably installed in the connecting holes I21 and II31. The support 3 is detachably installed at the lower end of the base 2 by bolts, so that the entire correction assembly is detachably connected to the base 2 by bolts. After the correction assembly presses the bearing 1 at multiple positions, the correction assembly can be removed.

[0026] like Figures 1-2 As shown, a mounting shaft 22 is provided in the middle of the base 2. The mounting shaft 22 and the base 2 are concentrically arranged. A mounting plate 7 is detachably mounted on the mounting shaft 22. Several protruding plates 72 are provided on the mounting plate 7. The protruding plates 72 abut against the upper end of the bearing 1. At least three protruding plates 72 are provided. If fewer than three protruding plates 72 are provided, it will be difficult to ensure that the lower end of the bearing 1 is kept stable when pressing the bearing 1, and the bearing 1 will also tilt. With three protruding plates 72, the adjacent protruding plates 72 are at 120°, which can stably press the bearing 1 onto the base 2. To ensure the bearing 1 remains stable during grinding, the mounting plate 7 is provided with a slot 71, and the mounting shaft 22 is connected in the slot 71. A clamping block 8 is slidably provided on the mounting shaft 22, and the clamping block 8 and the mounting shaft 22 are connected by a thread. The clamping block 8 is connected at the upper end of the mounting plate 7. When installing the mounting plate 7, the mounting plate 7 is connected to the mounting shaft 22 from the slot 71 position, so that the convex plate 72 and the upper end of the bearing 1 are aligned. Then, the clamping block 8 is screwed into the mounting shaft 22, so that the clamping block 8 and the mounting plate 7 abut against each other, and the mounting plate 7 and the upper end of the bearing 1 abut against each other.

[0027] After bearing 1 is installed on base 2, the alignment assembly is bolted to base 2. The position of movable pressure plate 4 is adjusted so that nut 62 presses movable pressure plate 4 against the upper end of bearing 1. Multiple movable plates A are adjusted in this way to ensure that bearing 1 is stably connected to base 2 and does not tilt on base 2. Then, mounting plate 7 is connected to the upper end of bearing 1 to press bearing 1 firmly. The alignment assembly serves as the first structure for adjusting the position of bearing 1. After adjustment by the alignment assembly, mounting plate 7 serves as the final structure for adjusting the position of bearing 1. After mounting plate 7 is fixed to the upper end of bearing 1, movable plates A and base 2 are removed by bolts, allowing for adjustment of the bearing 1's external position. The end face is ground. The mounting plate 7 and the correction component are used together and are indispensable. If the correction component is missing, the mounting plate 7 is directly pressed onto the upper end of the bearing 1. During the pressing process of the mounting plate 7, the bearing 1 will be subjected to a large pressure instantly. If the bearing 1 tilts on the base 2, it is easy to cause wear on the bearing 1 or the base 2, affecting the quality of the bearing 1. If the mounting plate 7 is missing, the outer end face of the bearing 1 cannot be ground. The use of both together greatly avoids the bearing 1 from tilting during the clamping process and avoids the bearing 1 from jumping during the grinding process, which would lead to the deformation of the bearing 1. This maximizes the grinding accuracy and the life of the bearing 1.

[0028] This is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A special fixture for grinding bearing outer rings, characterized in that, The device includes a base and a correction assembly disposed on the outside of the base. The bearing is connected to the base. The correction assembly includes a support member and a movable plate. The support member is connected to the lower end of the base. The movable plate includes several movable pressure plates. The movable pressure plates are arranged parallel to the support member. Several support plates are disposed on the support member. The support plates and movable pressure plates are aligned, and the distance between the movable pressure plates and the support plates is adjustable. The movable pressure plates are connected to the upper end of the bearing.

2. The special fixture for grinding bearing outer rings according to claim 1, characterized in that: The movable plate also includes a column, which is disposed between the support plate and the movable pressure plate. A limit block is provided on the column, one end of the column passes through the movable pressure plate, and the lower end of the movable pressure plate is supported on the limit block.

3. A special fixture for grinding bearing outer rings according to claim 2, characterized in that: The movable plate also includes a positioning screw, which is disposed between the movable pressure plate and the support plate, and is arranged parallel to the column.

4. A special fixture for grinding bearing outer rings according to claim 3, characterized in that: The movable pressure plate is provided with a channel, and the positioning screw and the column are respectively arranged in the channel, with one end of the positioning screw extending out of the channel and one end of the column extending out of the channel.

5. A special fixture for grinding bearing outer rings according to claim 3, characterized in that: The positioning screw is fitted with a nut via a threaded connection. The nut is connected to the upper end of the movable pressure plate and is pressed against the movable pressure plate.

6. A special fixture for grinding bearing outer rings according to claim 1, characterized in that: The base is provided with several connecting holes I, and the support is provided with connecting holes II. The connecting holes I and connecting holes II are aligned, and bolts are detachably installed in the connecting holes I and connecting holes II.

7. A special fixture for grinding bearing outer rings according to claim 1, characterized in that: A mounting shaft is provided in the middle of the base. The mounting shaft and the base are concentrically arranged. A mounting plate is detachably provided on the mounting shaft. A plurality of protruding plates are provided on the mounting plate. The protruding plates abut against the upper end of the bearing.

8. A special fixture for grinding bearing outer rings according to claim 7, characterized in that: The mounting plate is provided with a slot, the mounting shaft is connected in the slot, and a clamping block is slidably provided on the mounting shaft, the clamping block being connected to the upper end of the mounting plate.

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