High-precision bearing combination structure

Abstract

The utility model provides a high-precision bearing combination structure, which belongs to the technical field of bearings and comprises a bearing seat, a thrust angle ball contact bearing and a shaft sleeve. A shaft body is inserted into the bearing seat, and an end cover is mounted at the bottom of the bearing seat; according to the utility model, the thrust angle ball contact bearing is arranged in the bearing seat, the ultra-precision cylindrical roller bearing is arranged at the bottom of the thrust angle ball contact bearing, the structure adopts a combined device of the ultra-precision cylindrical roller bearing and the thrust angle ball contact bearing, and the two bearings are precision bearings and have smaller clearance and higher precision; the radial double-row cylindrical rollers are matched with the angular contact balls which have large axial contact angles and are bidirectionally symmetrical, so that the radial rigidity and the axial rigidity and the bearing capacity are optimally configured, and the structural precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field, concretely is a high-precision bearing combination structure. BACKGROUND

[0002] Bearing plays the role of fixing and reducing load friction coefficient in mechanical transmission process, and the size and mechanical performance are required to be high in precision. The bearing is generally composed of inner ring, outer ring, retainer, rolling body and sealing ring, and the bearing is widely used in the mechanical field because of its simple structure and convenient use. The higher the precision between the bearing rolling element and the inner ring and the outer ring, the smaller the friction, and the longer the service life of the bearing. In the prior art, the inner ring and the outer ring of the bearing are connected by the rolling body. In the process of rotating, the inner ring and the outer ring are easily affected by the rolling body and move irregularly, resulting in poor precision of the device. SUMMARY

[0003] The utility model discloses a high-precision bearing combination structure to solve the problem that the inner ring and the outer ring of the bearing in the prior art are connected by the rolling body, and the inner ring and the outer ring are easily affected by the rolling body and move irregularly in the process of rotating, resulting in poor precision of the device.

[0004] To achieve the above object, the utility model provides the following technical scheme: a high-precision bearing combination structure, which comprises a bearing seat, a thrust angle ball contact bearing and a shaft sleeve.

[0005] Among them: the inside of bearing seat is connected with the shaft body, the bottom of bearing seat is installed with end cover.

[0006] The thrust angle ball contact bearing is installed in the inside of the bearing seat, and the inside of the bearing seat is installed with the super-precision cylindrical roller bearing at the bottom of the thrust angle ball contact bearing. The thrust angle ball contact bearing and the cylindrical roller bearing are sequentially sleeved on the surface of the shaft body.

[0007] The shaft sleeve is installed in the inside of the bearing seat, and the shaft sleeve is sleeved on the outside of the thrust angle ball contact bearing and the cylindrical roller bearing. The inner ring of the thrust angle ball contact bearing and the cylindrical roller bearing is locked by the precision locking nut in the axial direction, and the outer ring of the thrust angle ball contact bearing and the cylindrical roller bearing is fixed by the internal hexagonal bolt and the end cover.

[0008] As a preferred scheme of the utility model: adjusting washers are arranged between the thrust angle ball contact bearing and the cylindrical roller bearing.

[0009] As a preferred scheme of the utility model: adjusting gap washers are arranged at the connecting position of the thrust angle ball contact bearing and the precision locking nut and the bottom of the cylindrical roller bearing.

[0010] As an optimal scheme of the utility model: the end cover and the shaft sleeve are connected together through the fixed bolt.

[0011] As an optimal scheme of the utility model: the outer side of the shaft sleeve is provided with the reciprocating type labyrinth double water channel, the water inlet joint is installed in the middle of one side of the bearing seat, and the water outlet joint is connected to the bottom of the other side of the bearing seat.

[0012] As an optimal scheme of the utility model: the roller in the cylindrical roller bearing is radial double-row cylindrical roller, and the internal of the thrust angular ball contact bearing is bidirectional symmetrical spherical roller.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] (1) the bearing seat is internally provided with the thrust angular ball contact bearing, the bottom of the thrust angular ball contact bearing is provided with the super-precision cylindrical roller bearing, the structure adopts the super-precision cylindrical roller bearing and the thrust angular contact ball bearing combination device, the two bearings are precision bearings, have small play and high precision, the radial double-row cylindrical roller and the angular contact ball with the larger contact angle and bidirectional symmetry are matched, so that the radial and axial stiffness and the carrying capacity are optimally configured, and the structural precision is improved.

[0015] (2) the adjusting gasket is arranged between the thrust angular ball contact bearing and the cylindrical roller bearing, the adjusting gasket is attached between the bearings, the adjusting gasket is arranged at the connection between the thrust angular ball contact bearing and the precision locking nut and the bottom of the cylindrical roller bearing, the play value can be effectively controlled through the change amount of the gasket, the thickness of the end cover and the locking torque of the bolt, reasonable play adjustment can reduce friction, improve the stability and rotation precision of the bearing, and meet the needs of thermal expansion and load change. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic view of the utility model;

[0017] Figure 2 It is the shaft sleeve surface structure schematic view of the utility model;

[0018] Figure 3 It is the thrust angular ball contact bearing and cylindrical roller bearing structure schematic view of the utility model;

[0019] Figure 4 It is the cross section structure schematic view of the utility model.

[0020] In the figure: 1, bearing seat; 2, shaft body; 3, end cover; 4, thrust angular ball contact bearing; 5, cylindrical roller bearing; 6, shaft sleeve; 7, precision locking nut; 8, internal hexagonal bolt; 9, adjusting washer; 10, adjusting gap washer; 11, fixing bolt; 12, reciprocating labyrinth double waterway; 13, water inlet joint; 14, water outlet joint. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Referring to Figures 1-4 A high-precision bearing combination structure comprises a bearing seat 1, a thrust angular ball contact bearing 4 and a shaft sleeve 6; the bearing seat 1 is internally connected with a shaft body 2, and the bottom of the bearing seat 1 is provided with an end cover 3.

[0023] Referring to Figure 3 , Figure 4 The thrust angular ball contact bearing 4 is installed in the interior of the bearing seat 1, and the interior of the bearing seat 1 is provided with an ultra-precision cylindrical roller bearing 5 at the bottom of the thrust angular ball contact bearing 4; the thrust angular ball contact bearing 4 and the cylindrical roller bearing 5 are sequentially sleeved on the surface of the shaft body 2; the rollers in the interior of the cylindrical roller bearing 5 are radial double-row cylindrical rollers, and the interior of the thrust angular ball contact bearing 4 is a ball-shaped roller which is bidirectional and symmetrically arranged in the axial direction.

[0024] In actual use, the thrust angular ball contact bearing 4 is installed in the interior of the bearing seat 1, and the bottom of the thrust angular ball contact bearing 4 is provided with the ultra-precision cylindrical roller bearing 5; the combination of the ultra-precision cylindrical roller bearing 5 and the thrust angular ball contact bearing 4 is adopted; both the bearings are precision bearings, and have small play and high precision; the radial double-row cylindrical rollers and the angular contact ball which is bidirectional and symmetrically arranged in the axial direction are matched, so that the radial and axial stiffness and the carrying capacity are optimally configured, and the structural precision is improved.

[0025] Referring to Figure 4 The shaft sleeve 6 is installed in the interior of the bearing seat 1, and the shaft sleeve 6 is sleeved on the exterior of the thrust angular ball contact bearing 4 and the cylindrical roller bearing 5; the inner ring of the thrust angular ball contact bearing 4 and the cylindrical roller bearing 5 in the axial direction is locked by the precision locking nut 7; and the outer ring of the thrust angular ball contact bearing 4 and the cylindrical roller bearing 5 is fixedly pressed by the internal hexagonal bolt 8 and the end cover 3.

[0026] Specific use: the outer sleeve of the thrust angular ball contact bearing 4 and the cylindrical roller bearing 5 is sleeved with the shaft sleeve 6, the inner ring is locked with the precision locking nut 7, and the outer ring is pressed with the hexagonal bolt 8 and the end cover 3, so that the bearing is stably installed in the shaft sleeve 6, the shaking of the bearing during use is reduced, and the structural precision is improved.

[0027] Please refer to Figure 4 , the adjusting gasket 9 is arranged between the thrust angular ball contact bearing 4 and the cylindrical roller bearing 5, and the gap adjusting gasket 10 is arranged at the connection position of the thrust angular ball contact bearing 4 and the precision locking nut 7 and the bottom of the cylindrical roller bearing 5.

[0028] Specific use: the adjusting gasket 9 is arranged between the thrust angular ball contact bearing 4 and the cylindrical roller bearing 5, and the gap adjusting gasket 10 is arranged at the connection position of the thrust angular ball contact bearing 4 and the precision locking nut 7 and the bottom of the cylindrical roller bearing 5, and the thickness of the end cover 3 and the locking torque of the bolt are changed, so that the runout value can be effectively controlled, reasonable gap adjustment can reduce friction, improve the stability and rotation precision of the bearing, and meet the needs of thermal expansion and load change.

[0029] Please refer to Figure 4 , the end cover 3 and the shaft sleeve 6 are connected together through the fixing bolt 11.

[0030] Specific use: the end cover 3 and the shaft sleeve 6 are connected together through the fixing bolt 11, so as to ensure the stability of the installation of the shaft sleeve 6.

[0031] Please refer to Figure 2 , the reciprocating labyrinth double waterway 12 is arranged on the outer side of the shaft sleeve 6, the water inlet joint 13 is arranged on one side of the bearing seat 1, and the water outlet joint 14 is arranged on the other side of the bearing seat 1.

[0032] Specific use: the reciprocating labyrinth double waterway 12 is arranged on the outer side of the shaft sleeve 6, under the condition of sufficient water flow provided by the large cross-sectional area, when the cooling water flows into the waterway through the water inlet joint 13, the two bearings are provided with sufficient cooling under high load and heat, the influence of the temperature difference before and after on the precision is reduced, and the cooled water flows out through the water outlet joint 14.

[0033] The bearing seat 1 is internally provided with a thrust angular ball contact bearing 4, and the bottom of the thrust angular ball contact bearing 4 is provided with an ultra-precision cylindrical roller bearing 5, and the structure adopts an ultra-precision cylindrical roller bearing 5 and a thrust angular ball contact bearing 4 combined device, both of which are precision bearings, and have small play and high precision, and the radial double-row cylindrical roller and the angular contact ball are matched in a large contact angle and bidirectional symmetry, so that the radial and axial stiffness and carrying capacity are optimally configured, the structural precision is improved, the thrust angular ball contact bearing 4 and the cylindrical roller bearing 5 are provided with adjusting shims 9, the connecting part of the thrust angular ball contact bearing 4 and the precision locking nut 7 and the bottom of the cylindrical roller bearing 5 are all provided with play adjusting shims 10, and through the change of the thickness of the adjusting shims 9, the play adjusting shims 10, the end cover 3 and the locking torque of the bolts, the play value can be effectively controlled, reasonable play adjustment can reduce friction, improve the stability and rotation precision of the bearing, and meet the requirements of thermal expansion and load change.

[0034] The contents not described in detail in the description belong to the prior art known to those skilled in the art, although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-precision bearing assembly structure, characterized in that: Include: The bearing seat (1), the shaft body (2) is connected in the inside of the bearing seat (1), the end cover (3) is installed at the bottom of the bearing seat (1); Thrust angular ball contact bearing (4), the thrust angular ball contact bearing (4) is installed in the inside of bearing seat (1), the inside of bearing seat (1) is located at the bottom of thrust angular ball contact bearing (4) and installs ultra-precision cylindrical roller bearing (5), the thrust angular ball contact bearing (4) and cylindrical roller bearing (5) are sequentially set in the surface of shaft body (2); The shaft sleeve (6) is installed in the inside of bearing seat (1), the shaft sleeve (6) is set in the outside of thrust angular ball contact bearing (4) and cylindrical roller bearing (5), the inner ring of thrust angular ball contact bearing (4) and cylindrical roller bearing (5) is locked by precision locking nut (7), the outer ring of thrust angular ball contact bearing (4) and cylindrical roller bearing (5) is fixed by pressing hexagon bolt (8) and end cover (3).

2. A high-precision bearing assembly according to claim 1, characterized in that: The adjusting gasket (9) is arranged between the thrust angular ball contact bearing (4) and the cylindrical roller bearing (5).

3. The high-precision bearing assembly structure according to claim 1, characterized in that: The thrust angular ball contact bearing (4) and the precision locking nut (7) are connected, and the bottom of the cylindrical roller bearing (5) is provided with a gap adjusting gasket (10).

4. The high-precision bearing assembly of claim 1, wherein: The end cover (3) and the shaft sleeve (6) are connected together by the fixing bolt (11).

5. A high-precision bearing assembly according to claim 4, wherein: The outer side of the shaft sleeve (6) is provided with a reciprocating labyrinth double water channel (12), one side of the bearing seat (1) is provided with a water inlet connector (13), and the other side of the bearing seat (1) is connected with a drain connector (14).

6. The high-precision bearing assembly of claim 1, wherein: The rollers in the cylindrical roller bearing (5) are radial double-row cylindrical rollers, and the rollers in the thrust angular ball contact bearing (4) are axially bidirectional symmetric spherical rollers.

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