Swivel bearing clearance adjusting device
By designing a rotating bearing clearance adjustment device, the bearing clearance is automatically adjusted by using components such as elastic gap elimination pushing device and gap setting and withdrawal device, which solves the problems of vibration and friction resistance increase caused by temperature changes, and achieves high-precision bearing rotation and ensure the rigidity of the system.
Patent Information
- Application Number
- CN202421288614.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-06-06
AI Technical Summary
When the temperature of the existing rotating bearings changes, the gap value changes lead to an increase in vibration, and when the gap is eliminated by an elastic compression device, the friction resistance increases, affecting normal use.
Design a rotating bearing clearance adjustment device, including a base, elastic gap elimination push device, gap elimination positioning block, gap fixed and gap elimination positioning block pressing device, through the synergy of these components, the bearing clearance can be automatically adjusted to ensure that Keep a small gap value as temperature changes.
It effectively reduces the vibration of rotating bearings when temperature changes, improves the rotation accuracy of the bearings, and ensures the rigidity and stability of the system by automatically adjusting the gap.
Smart Images
Figure CN222436845U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rotary bearings, in particular to a rotary bearing clearance adjustment device. Background Art
[0002] Sliding and rolling rotary bearings are widely used. There are two methods to eliminate the gap between relatively moving parts: fixed gap and elastic compression to eliminate the gap. When setting the gap, manufacturing errors are taken into account. In particular, uneven temperature changes will cause the gap value to change. In this case, the gap must be set to a larger value. A larger gap value allows a larger vibration space when the system is running. Fixed-gap rotary bearings can operate normally with a gap of about 0.001mm without considering thermal expansion and contraction. However, after considering thermal factors, a gap of more than 0.01mm is often required for normal use. For this reason, elastic compression devices are often set to eliminate the gap so that the system gap is zero. When there is uneven thermal expansion and contraction, the elastic element will automatically expand and contract to adapt to the changes. However, this method increases the friction resistance, especially when there is no sliding friction of the rolling body between the shaft and the rotary bearing, the friction force rises sharply, making it difficult to use normally. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a rotary bearing clearance adjustment device, which can effectively solve the deficiencies in the prior art.
[0004] The utility model is realized through the following technical scheme: a rotary bearing clearance adjustment device, comprising a base, an elastic clearance-eliminating pushing device, a clearance-eliminating positioning block, a fixed clearance retreat device, a clearance-eliminating positioning block pressing device, an elastic clearance-eliminating pushing device pushing the clearance-eliminating positioning block and the fixed clearance retreat device, pressing the pressed bearing to eliminate the clearance of the rotary bearing, and after the clearance is eliminated, the clearance-eliminating positioning block pressing device fixes the clearance-eliminating positioning block on the base, and then the fixed clearance retreat device contracts and retreats, so that the bearing clearance value is the set clearance value.
[0005] As a preferred technical solution: the elastic backlash-eliminating pushing device is a spring or an air cylinder or an oil cylinder.
[0006] As a preferred technical solution: the backlash-eliminating positioning block pressing device is a hydraulic cylinder, an air cylinder or an inclined wedge pressing device.
[0007] As a preferred technical solution: the fixed gap retreat device is a piezoelectric ceramic pressure reduction contraction or a flat shaft rotation contraction.
[0008] As a preferred technical solution: there is a base, an elastic gap-eliminating pushing device, a gap-eliminating positioning block, a fixed gap retreat device, a gap-eliminating positioning block pressing device, an elastic gap-eliminating pushing device pushes the gap-eliminating positioning block and the fixed gap retreat device to press the pressed bearing to eliminate the gap of the rotating bearing, the gap-eliminating positioning block pressing device fixes the gap-eliminating positioning block on the base after the gap is eliminated, and then the fixed gap retreat device contracts and retreats to make the bearing gap value the set gap value, an auxiliary positioning block is provided between the pressed bearing and the fixed gap retreat device, an auxiliary positioning block pressing device is provided to press the auxiliary positioning block on the base, and an elastic device is provided to push the pressed bearing toward the auxiliary positioning block.
[0009] As a preferred technical solution: the elastic backlash-eliminating pushing device is a spring or an air cylinder or an oil cylinder.
[0010] As a preferred technical solution: the backlash-eliminating positioning block pressing device is a hydraulic cylinder, an air cylinder or an inclined wedge pressing device.
[0011] As a preferred technical solution: the auxiliary positioning block clamping device is a hydraulic cylinder or an air cylinder or an inclined wedge for clamping.
[0012] As a preferred technical solution: the fixed gap retreat device is a piezoelectric ceramic pressure reduction contraction or a flat shaft rotation contraction.
[0013] As a preferred technical solution: an elastic pushing device pushes the compressed bearing in a direction opposite to that of the elastic anti-backlash pushing device. The elastic pushing device is a spring or an air cylinder or an oil cylinder, and the elastic force is smaller than the elastic force of the elastic anti-backlash pushing device.
[0014] The beneficial effects of the utility model are as follows: the utility model uses an elastic pressing device to press the clearance-eliminating positioning block, the clearance-fixing retreating device and the auxiliary positioning block toward the bearing to eliminate the clearance, and then the clearance-eliminating positioning block is fixed, and the clearance-fixing retreating device is retreated to adjust the bearing to the set clearance, and an elastic clearance pushing device is used to maintain the bearing clearance. When the clearance changes due to thermal expansion and contraction, it can be continuously adjusted and adapted so that the rotating bearing clearance can be maintained at a smaller value, the accuracy of shaft rotation is increased, and the system rigidity is ensured after the auxiliary positioning block is pressed. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 This is a schematic diagram of radial elastic clearance elimination of the background technology of the utility model;
[0017] Figure 2This is a schematic diagram of axial elastic clearance elimination of the background technology of the utility model;
[0018] Figure 3 It is a schematic diagram of the gap elimination of the utility model;
[0019] Figure 4 This is a schematic diagram of the compression of the gap elimination positioning block of the utility model;
[0020] Figure 5 This is a schematic diagram of the fixed gap unit of the utility model giving way to a gap;
[0021] Figure 6 This is a schematic diagram of the gap elimination and gap fixing device with auxiliary positioning blocks of the utility model;
[0022] Figure 7 This is a schematic diagram of radial clearance elimination of the utility model;
[0023] Figure 8 This is a schematic diagram of the compression of the radial clearance-eliminating positioning block of the utility model;
[0024] Fig. 9 This is a schematic diagram of the radial fixed gap unit of the utility model giving way to a gap;
[0025] Fig.10 This is a schematic diagram of a radial clearance elimination device with an auxiliary positioning block installed in the utility model;
[0026] Fig.11 This is a schematic diagram of the axial clearance elimination of the utility model;
[0027] Fig.12 This is a schematic diagram of the compression of the axial clearance eliminating positioning block of the utility model;
[0028] Fig.13 This is a schematic diagram of the axial fixed gap unit of the utility model giving way to a gap;
[0029] Fig.14 It is a schematic diagram of the elastically driven bearing ring after the axial fixed gap unit of the utility model has yielded the gap;
[0030] Fig.15 This is a schematic diagram of the axial clearance eliminating and gap fixing device with auxiliary positioning blocks of the utility model;
[0031] Fig.16 This is a schematic diagram of the retreat state of the eccentric shaft fixed gap unit of the utility model;
[0032] Fig.17 This is a schematic diagram of the non-yielding state of the eccentric shaft fixed gap unit of the utility model;
[0033] Fig.18 It is a schematic diagram of the eccentric shaft of the utility model; Description of the drawings:
[0035] 1. Elastic compression device; 2. Pressed bearing; 201. Pressed bearing outer circle; 3. Bearing seat; 4. Roller; 5. Shaft; 6. Bearing inner ring; 7. Washer; 8. Housing; 9. Base; 901. Radial bearing outer frame base; 902. Radial bearing outer frame base with auxiliary positioning block; 10. Anti-backlash positioning block; 1001. Radial anti-backlash positioning block; 1002. Axial anti-backlash positioning block; 11. Fixed clearance retreat device; 1101. Flat shaft retreat block; 1102. Flat shaft; 12. Anti-backlash positioning block clamping device; 1201. Anti-backlash positioning block 1. Clearance positioning block clamping cylinder; 1202, axial clearance eliminating positioning block tensioning cylinder; 13, clearance eliminating positioning block clamping rod; 1301, clearance eliminating positioning block clamping piston; 1302, axial clearance eliminating positioning block tensioning piston; 14, auxiliary positioning block; 15, auxiliary positioning block clamping device; 1501, radial auxiliary positioning block clamping cylinder; 1502, axial auxiliary positioning block tensioning cylinder; 16, auxiliary positioning block clamping rod; 1601, radial auxiliary positioning block clamping piston; 1602, axial auxiliary positioning tensioning piston; 17, auxiliary spring; DETAILED DESCRIPTION
[0036] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.
[0037] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.
[0038] Example 1
[0039] Background technology explains that radial clearance elimination is as follows Figure 1 As shown, the spring elastic pressing device 1 presses the pressed bearing 2 toward the shaft 5, so that the gap between the pressed bearing 2, the bearing seat 3, the roller 4 and the shaft 5 is eliminated. The axial gap is eliminated as shown in FIG. Figure 2 As shown, the spring elastic pressing device 1 presses the outer circle 201 of the pressed bearing toward the roller 4 and the inner ring 6 of the bearing between the outer circle 201 of the pressed bearing and the washer 7, and the other end presses the outer circle 201 of the pressed bearing toward the roller 4 and the inner ring 6 of the bearing through the washer 7. The above example can also be a sliding bearing without the roller 4.
[0040] like Figure 1 , Figure 2 , Fig. 9 , Fig.11 , Fig.12 , Fig.13As shown, the clearance-eliminating positioning block clamping device 12 is fixed on the base 9, and the clearance-eliminating positioning block clamping rod 13 can be extended and retracted. When retracting, it presses the clearance-eliminating positioning block 10. When starting to adjust, the clearance-eliminating positioning block clamping rod 13 extends out to press the clearance-eliminating positioning block 10 freely in the compression direction of the elastic compression device 1. The elastic compression device 1 compresses the clearance-eliminating positioning block 10, and the fixed clearance retreat device 11 presses the pressed bearing 2. The state of the fixed clearance retreat device 11 in the compression direction of the elastic compression device 1 has two states, long and end. At this time, it is in the long state. After the pressed bearing 2 is compressed, the radial or axial clearance of the bearing is eliminated. After the clearance is eliminated, the clearance-eliminating positioning block clamping device 12 acts to retract the clearance-eliminating positioning block clamping rod 13 to press the clearance-eliminating positioning block 10 on the base 9 (as shown in FIG. Figure 4 As shown), after the gap elimination positioning block 10 is pressed, the state of the gap setting and retreating device 11 changes from long to short (as shown in FIG. Figure 5 As shown), the change in length is the clearance value of the bearing in this direction. In this embodiment, the fixed clearance device 11 is a piezoelectric ceramic. Figure 3 and Figure 4 When the power is applied, the piezoelectric ceramic stretches. Figure 5 When the power is turned off in the state, the piezoelectric ceramics will retract. In practical applications, 150V DC can make the piezoelectric ceramics stretch to 5 microns, and the value less than 5 microns can be obtained by adjusting the DC voltage acting on it. The elastic compression device 1 can be a spring or a cylinder or an oil cylinder. The above process can be automatically controlled by PLC, and the bearing clearance can be continuously adjusted. The purpose of high-precision rotation of the bearing can be achieved with a smaller clearance.
[0041] Example 2
[0042] The difference from the first embodiment is that the fixed gap retreat device 11 is adjusted by a flat shaft 1102. Figure 16-Figure 18 As shown, there are two flat shaft concession blocks 1101 facing each other with a circular hole in the middle, in which there is a flat shaft 1102. The size of the flat shaft 1102 is A>B, and the difference between A and B is the set bearing clearance value. The flat shaft 1102 can be rotated 90° in the circular hole to achieve the purpose of fixed clearance.
[0043] Example 3
[0044] This is the application of embodiment 1 to the radial bearing block structure, such as Figure 7As shown, when the elastic pressing device 1, the pressed bearing 2, the fixed clearance retreat device 11, the radial bearing outer frame base 901, the radial clearance eliminating positioning block 1001, the clearance eliminating positioning block pressing cylinder 1201, and the clearance eliminating positioning block pressing piston 1301 are initially adjusted, the clearance eliminating positioning block 11 is in an extended state, the elastic pressing device 1 presses the radial clearance eliminating positioning block 1001 and the fixed clearance retreat device 11, and presses the pressed bearing 2 toward the roller 4 and the shaft 5 to eliminate the radial clearance of the bearing, and then the clearance eliminating positioning block pressing cylinder 1201 presses the clearance eliminating positioning block pressing piston 1301 toward the radial clearance eliminating positioning block 1001, and the radial clearance eliminating positioning block 1001 and the radial bearing outer frame base 901 are relatively fixed (such as Figure 8 As shown), after the radial clearance eliminating positioning block 1001 is fixed, the clearance setting and retreating device 11 is retracted (as shown Fig. 9 As shown), axial clearance is generated at this time.
[0045] Example 4
[0046] Unlike the above embodiments, Fig.11 As shown, the fixed clearance retreat device 11 is in an extended state, the axial clearance elimination positioning block tensioning piston 1302 releases the axial clearance elimination positioning block 1002, and the elastic pressing device 1 presses the axial clearance elimination positioning block 1002 and the fixed clearance retreat device 11 against the outer circle 201 of the pressed bearing, so that the gap between the outer circle 201 of the pressed bearing and the roller 4 and the inner ring 6 of the bearing is eliminated, and then the axial clearance elimination positioning block tensioning cylinder 1202 withdraws the axial clearance elimination positioning block tensioning piston 1302 to press the axial clearance elimination positioning block 1002 and the housing 8 (as shown in FIG. Fig.12 As shown), the gap is zero at this time, and then the fixed gap retreat device 11 retracts (as shown Fig.13 As shown), a gap of a set clearance value is generated between the fixed clearance retreat device 11 and the outer circle 201 of the pressed bearing.
[0047] Example 5
[0048] Unlike Example 4, Fig.14 As shown, an auxiliary spring 17 pushes the outer circle 201 of the compressed bearing in Example 4 toward the fixed gap retreat device 11 to generate a bearing gap. This method is also applicable to Example 1, Example 2 and Example 3. The auxiliary spring 17 can be a spring, or it can be replaced by a cylinder or an oil cylinder. The elastic force of the auxiliary spring 17 is smaller than the elastic force of the elastic compression device 1.
[0049] Example 6
[0050] Different from Example 1, Figure 6As shown, the difference is that on the basis of Example 1, a bearing seat 3, an auxiliary positioning block 14, an auxiliary positioning block clamping device 15, and an auxiliary positioning block clamping rod 16 are added. After the steps of Example 1 are completed, the auxiliary positioning block clamping device 15 retracts the auxiliary positioning block clamping rod 16 to press the auxiliary positioning block 14 on the base 9, so that the force borne by the bearing will not be transmitted to the fixed gap retreat device 11, thereby ensuring the rigidity of the system.
[0051] Example 7
[0052] Different from the above embodiments, Fig.10 As shown, it is a combination of Example 3 and Example 6. After the steps of Example 3 are completed, the radial auxiliary positioning block clamping cylinder 1501 makes the radial auxiliary positioning block clamping piston 1601 press the auxiliary positioning block 14 onto the radial bearing with auxiliary positioning block outer frame base 902. The force borne by the bearing will not be transmitted to the fixed gap retreat device 11, which can ensure the rigidity of the system.
[0053] Example 8
[0054] Different from the above embodiments, Fig.15 As shown, it is a combination of Example 4 and Example 6. After the steps of Example 4 are completed, the axial auxiliary positioning block tensioning cylinder 1502 retracts the axial auxiliary positioning tensioning piston 1602 to press the auxiliary positioning block 14 onto the housing 8, so that the force borne by the bearing will not be transmitted to the fixed gap retreat device 11, thereby ensuring the rigidity of the system.
[0055] The beneficial effects of the utility model are as follows: the rotary bearing clearance adjustment device of the utility model uses an elastic pressing device to press the clearance eliminating positioning block, the clearance setting retreat device and the auxiliary positioning block toward the bearing to eliminate the clearance, and then the clearance eliminating positioning block is fixed, and the clearance setting retreat device retreats to adjust the bearing to the set clearance, and uses an elastic clearance pushing device to maintain the bearing clearance. When the clearance changes due to thermal expansion and contraction, it can be continuously adjusted and adapted so that the rotary bearing clearance can be maintained at a smaller value, the accuracy of shaft rotation is increased, and the system rigidity is ensured after the auxiliary positioning block is pressed.
[0056] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.
Claims
1. A rotary bearing clearance adjustment device, characterized in that: A base is provided, an elastic anti-backlash pushing device, an anti-backlash positioning block, a fixed backlash retreat device, an anti-backlash positioning block pressing device, an elastic anti-backlash pushing device pushes the anti-backlash positioning block and the fixed backlash retreat device to press the pressed bearing to eliminate the backlash of the rotating bearing, and the anti-backlash positioning block pressing device fixes the anti-backlash positioning block on the base after the backlash is eliminated, and then the fixed backlash retreat device contracts and retreats to make the bearing gap value equal to the set gap value.
2. The rotary bearing clearance adjustment device according to claim 1, characterized in that: The elastic anti-backlash pushing device is a spring or an air cylinder or an oil cylinder.
3. The rotary bearing clearance adjustment device according to claim 1, characterized in that: The anti-backlash positioning block clamping device is a hydraulic cylinder, an air cylinder or an inclined wedge.
4. The rotary bearing clearance adjustment device according to claim 1, characterized in that: The fixed gap retreat device is a piezoelectric ceramic pressure reduction contraction or a flat shaft rotation contraction.
5. A rotary bearing clearance adjustment device, characterized in that: A base is provided, an elastic gap-eliminating pushing device, a gap-eliminating positioning block, a fixed gap retreat device, a gap-eliminating positioning block pressing device, an elastic gap-eliminating pushing device pushes the gap-eliminating positioning block and the fixed gap retreat device to press the pressed bearing to eliminate the gap of the rotating bearing, and the gap-eliminating positioning block pressing device fixes the gap-eliminating positioning block on the base after the gap is eliminated, and then the fixed gap retreat device contracts and retreats to make the bearing gap value the set gap value, an auxiliary positioning block is provided between the pressed bearing and the fixed gap retreat device, and an auxiliary positioning block pressing device is provided to press the auxiliary positioning block on the base, and an elastic device is provided to push the pressed bearing toward the auxiliary positioning block.
6. The rotary bearing clearance adjustment device according to claim 5, characterized in that: The elastic anti-backlash pushing device is a spring or an air cylinder or an oil cylinder.
7. The rotary bearing clearance adjustment device according to claim 5, characterized in that: The anti-backlash positioning block clamping device is a hydraulic cylinder, an air cylinder or an inclined wedge.
8. The rotary bearing clearance adjustment device according to claim 5, characterized in that: The auxiliary positioning block clamping device is a hydraulic cylinder, an air cylinder or an inclined wedge.
9. The rotary bearing clearance adjustment device according to claim 5, characterized in that: The fixed gap retreat device is a piezoelectric ceramic pressure reduction contraction or a flat shaft rotation contraction.
10. The rotary bearing clearance adjustment device according to claim 5, characterized in that: An elastic pushing device pushes the compressed bearing in a direction opposite to that of the elastic anti-backlash pushing device. The elastic pushing device is a spring or an air cylinder or an oil cylinder, and the elastic force is smaller than the elastic force of the elastic anti-backlash pushing device.