Continuous compensation device for pretightening force of taper hole bearing

Abstract

A continuous compensation device for pretightening force of a taper hole bearing relates to the technical field of pretightening devices and comprises a roller shaft head, a bearing pack is sleeved on a conical surface of the roller shaft head, a round nut is arranged on one side of the bearing pack, which is positioned on a small-diameter section of the roller shaft head, a front baffle plate and a rear baffle plate are arranged between the round nut and the bearing pack in parallel, and an axial elastic body is arranged between the front baffle plate and the rear baffle plate. The utility model solves the problems that in the prior art, the round nut retreats within a certain range due to the influence of factors such as radial pressure applied to the roller and equipment vibration during production, and the original pre-tightening force is quickly weakened or even disappears due to the retreating of the round nut because the round nut and the retaining pad are not elastic bodies; and the inner ring of the bearing and the shaft head of the roller are separated and slide relative to each other, so that the shaft feeding problem is finally caused.

Description

TECHNICAL FIELD

[0001] The utility model relates to pre -tensioning device technical field, concretely relates to taper hole bearing pre -tensioning force sustained compensation device. BACKGROUND

[0002] When the paper mill carries out production activity, the roller equipment is used in many places, and the running of the roller is strictly required to be centered, the taper hole bearing (the bearing inner hole adopts 1:12 or 1:30 taper) is often used to ensure the centering accuracy, due to the reasons such as the self weight of the roller, radial pressure and equipment vibration, the locking round nut of the bearing is often loosened and retracted, the bearing occurs axial movement, the installation pre -tensioning force of the roller and the bearing is reduced and relative sliding occurs, finally, the problems such as "eating shaft" of equipment are caused, in order to maintain the installation pre -tensioning force of the bearing through lower cost and smaller change, the structural device is invented.

[0003] The prior art discloses a patent with a publication number CN219570653U, which includes a main shaft and a bearing chamber structure, the end of the main shaft located in the bearing chamber is provided with a bearing structure, the bearing structure includes a bearing locking piece, a first thrust bearing and a second thrust bearing, a T-shaped sleeve is arranged between the first thrust bearing and the second thrust bearing, the bearing outer ring of the first thrust bearing and the bearing outer ring of the second thrust bearing are connected with the end face of the T-shaped sleeve and are arranged on the two sides of the T-shaped sleeve, the bearing outer ring of the first thrust bearing and the T-shaped sleeve have a floating gap in the radial direction, and the end face of the T-shaped sleeve facing the first thrust bearing is provided with a floating pre-tightening structure. The first thrust bearing and the second thrust bearing are installed in the opposite direction, which can provide more reliable precision and thrust for transmission, increase the reliability of transmission, and the floating pre-tightening structure arranged on the T-shaped sleeve can provide floating pressure for the first thrust bearing, so that the thrust bearing is pre-tightened, the bearing posture is ensured, and the equipment can normally operate. The bearing locking piece uses a locking nut.

[0004] The existing device gradually exposes the deficiencies of the prior art with use, mainly in the following aspects:

[0005] The existing structure bearing has the space of axial movement, and is influenced by factors such as the self weight of the roller (the self weight of most rollers is several tons to tens of tons), the radial pressure applied to the roller during production, equipment vibration, so that the round nut retracts within a certain range, and because the round nut and the stop washer are not elastic bodies, the original pre-tightening force is rapidly weakened or even disappears due to the retraction of the round nut, the bearing inner ring and the roller shaft head are separated and relative sliding occurs, finally, the problem of eating shaft is caused.

[0006] From the above, it is obvious that the prior art has inconvenience and defects in actual use, so it is necessary to improve. UTILITY MODEL CONTENTS

[0007] In view of the defects in the prior art, the cone bearing pre-tightening force continuous compensation device is used to solve the problem that the radial pressure applied to the roller, equipment vibration and other factors affect the production in the traditional technology, so that the round nut retreats within a certain range, and because the round nut and the stop washer are not elastic bodies, the original pre-tightening force is rapidly weakened or even disappears due to the round nut retreat, which causes the bearing inner ring and the roller shaft head to be separated and relatively slide, and finally causes the problem of eating shaft.

[0008] In order to achieve the above object, the utility model provides the following technical scheme:

[0009] The cone bearing pre-tightening force continuous compensation device, including the roller shaft head, the tapered surface of the roller shaft head is sleeved with a bearing set, a round nut is arranged on one side of the small diameter section of the roller shaft head, front and rear stop sheets are arranged between the round nut and the bearing set, and an axial elastic body is arranged between the front and rear stop sheets.

[0010] As an optimized scheme, the end face of the round nut towards the front stop sheet is provided with a stop washer.

[0011] As an optimized scheme, the front stop sheet is provided with a plurality of through holes, the rear stop sheet is provided with a plurality of thread grooves aligned with the through holes, a pre-tightening screw is detachably inserted into the through hole, and the end of the pre-tightening screw is threadedly connected with the thread groove.

[0012] As an optimized scheme, one side wall of the rear stop sheet is provided with a step abutting against the end part of the bearing set inner ring, and the other side wall abuts against one end of the axial elastic body.

[0013] As an optimized scheme, one side wall of the front stop sheet abuts against the stop washer, and the other end abuts against the other end of the axial elastic body.

[0014] As an optimized scheme, the axial elastic body comprises one of a spring washer, a pressure spring and a disc spring.

[0015] As an optimized scheme, the roller shaft head is sleeved with a bearing chamber covering the bearing set.

[0016] As an optimized scheme, the two ends of the bearing chamber are respectively connected with an outer bearing chamber end cover and an inner bearing chamber end cover abutting against the end part of the bearing set outer ring.

[0017] As an optimized scheme, the roller shaft head is connected with an outer labyrinth ring and an inner labyrinth ring corresponding to the outer bearing chamber end cover and the inner bearing chamber end.

[0018] As an optimized solution, the bearing housing is provided with a lubricating oil inlet and a lubricating oil outlet that are connected to the space where the bearing assembly is located.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] The device compensates for the preload force that weakens rapidly due to the loosening and retraction of the round nut by the continuous action of the disc spring, thus ensuring a stable bearing installation.

[0021] The device only adds a preload compensation device without modifying the existing equipment structure, achieving stable equipment operation at a relatively low cost; the device requires no additional investment, does not require frequent replacement of parts, and can remain effective for a long time. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] In the diagram: 1-Roller head; 2-Inner labyrinth ring; 3-Inner bearing chamber end cover; 4-Bearing chamber; 5-Bearing assembly; 6-Lubricating oil inlet; 7-Outer bearing chamber end cover; 8-Outer labyrinth ring; 9-Round nut; 10-Anti-lock washer; 11-Lubricating oil outlet; 12-Front baffle; 13-Axial elastomer; 14-Preload screw; 15-Rear baffle. Detailed Implementation

[0025] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0026] like Figure 1 As shown, the tapered bearing preload continuous compensation device includes a roller head 1, a bearing assembly 5 is fitted on the tapered surface of the roller head 1, a round nut 9 is provided on one side of the small diameter section of the roller head 1, a front baffle 12 and a rear baffle 15 are arranged side by side between the round nut 9 and the bearing assembly 5, and an axial elastic body 13 is provided between the front baffle 12 and the rear baffle 15.

[0027] The end face of the round nut 9 facing the front baffle 12 is provided with a backing washer 10.

[0028] The front baffle 12 is surrounded by several through holes, and the rear baffle 15 is surrounded by several threaded grooves that are aligned with the through holes. A preload screw 14 is detachably inserted into the through hole, and the end of the preload screw 14 is threadedly connected to the threaded groove.

[0029] The rear baffle 15 has a stepped section on one side wall that abuts against the end of the inner ring of the bearing assembly 5, and the other side wall abuts against one end of the axial elastic body 13.

[0030] One side wall of the front baffle 12 abuts against the anti-rollback washer 10, and the other end abuts against the other end of the axial elastic body 13.

[0031] The axial elastic body 13 includes one of a spring washer, a compression spring, and a disc spring.

[0032] The roller head 1 is fitted with a bearing chamber 4 that covers the bearing assembly 5.

[0033] The bearing housing 4 is connected to an outer bearing housing end cover 7 and an inner bearing housing end cover 3 at its two ends, which abut against the outer ring end of the bearing assembly 5.

[0034] The roller shaft head 1 is connected to an outer labyrinth ring 8 and an inner labyrinth ring 2 that correspond to the outer bearing chamber end cover 7 and the inner bearing chamber 4 end.

[0035] The bearing chamber 4 has a lubricating oil inlet 6 and a lubricating oil outlet 11 that are connected to the space where the bearing assembly 5 is located. This is a common feature and a well-known practice to those skilled in the art, so it will not be described in detail here.

[0036] The device compensates for the preload force that weakens rapidly due to the loosening and retraction of the round nut 9 by the continuous action of the disc spring, thereby ensuring the continuous stability of the bearing installation.

[0037] The device only adds a preload compensation device without modifying the existing equipment structure, achieving stable equipment operation at a relatively low cost; the device requires no additional investment, does not require frequent replacement of parts, and can remain effective for a long time.

[0038] The working principle of this device is as follows:

[0039] After aligning the front baffle 12, disc spring assembly, and rear baffle 15, use tools to press them together (use a jack for smaller sizes and a press for larger sizes, etc.). Then use the pre-tightening screw 14 to connect and fix the front and rear baffles 15 to bind the axial pressure generated by the spring and form a continuous pre-tightening device for later use.

[0040] Connect the inner labyrinth ring 2 and the inner bearing chamber end cover 3 to the roller shaft head 1, but do not fix them first;

[0041] Install the bearing, continuous preload device, and round nut 9 onto the roller head 1 in sequence. After tightening the round nut 9, operate the anti-reverse washer 10 to prevent the round nut 9 from retracting. Note that the step of the back baffle 15 should contact the bearing to prevent it from affecting the bearing's self-alignment. Then remove the preload screw 14 of the continuous preload device so that the disc spring assembly applies a continuous preload force to the inner ring of the bearing.

[0042] Install the bearing housing 4 onto the bearing, then connect the outer bearing housing end cover 7 and the outer labyrinth ring 8 (connected in series to the roller shaft head 1). After all parts are aligned and installed, install the roller onto the equipment and connect the oil inlet and return pipelines respectively.

[0043] After the entire installation is completed and production is started, the axial pressure provided by the disc spring assembly increases the friction force that causes the round nut 9 to slide back, thus increasing the difficulty of the round nut 9 to slide back.

[0044] Due to the influence of the anti-retraction washer 10, the round nut 9 cannot retract indefinitely. When a limited retraction occurs, the disc spring extends axially and provides continuous pressure to supplement the preload required for bearing fixation, preventing the bearing inner ring from loosening and rubbing against the roller shaft head 1, thus preventing the shaft from being worn.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A taper hole bearing pre-tightening force continuous compensation device, characterized in that: The application relates to a roller shaft head (1), a bearing set (5) is sleeved on the conical surface of the roller shaft head (1), a round nut (9) is arranged on one side of the small-diameter section of the roller shaft head (1), front and rear stop flaps (12) and (15) are arranged between the round nut (9) and the bearing set (5), and an axial elastic body (13) is arranged between the front and rear stop flaps (12) and (15).

2. The taper bearing preload constant compensation device of claim 1, wherein: The end surface of the round nut (9) towards the front stop flap (12) is provided with a stop washer (10) in abutment.

3. The taper bearing preload constant compensation device of claim 2, wherein: The front stop flap (12) is provided with a plurality of through holes, the rear stop flap (15) is provided with a plurality of threaded grooves in alignment with the through holes, and a pre-tightening screw (14) is detachably inserted into the through hole.

4. The taper bearing preload constant compensation device of claim 3, wherein: One side wall of the rear stop flap (15) is provided with a step abutting against the inner ring end of the bearing set (5), and the other side wall abuts against one end of the axial elastic body (13).

5. The taper bearing preload constant compensation device of claim 4, wherein: One side wall of the front stop flap (12) abuts against the stop washer (10), and the other end abuts against the other end of the axial elastic body (13).

6. The taper bearing preload constant compensation device of claim 5, wherein: The axial elastic body (13) comprises one of a spring washer, a pressure spring and a disc spring.

7. The taper bearing preload constant compensation device of claim 6, wherein: The roller shaft head (1) is sleeved with a bearing chamber (4) covering the bearing set (5).

8. The taper bearing preload constant compensation device of claim 7, wherein: Both ends of the bearing chamber (4) are respectively connected with an outer bearing chamber end cover (7) abutting against the outer ring end of the bearing set (5) and an inner bearing chamber end cover (3).

9. The taper bearing preload constant compensation device of claim 8, wherein: The roller shaft head (1) is connected with an outer labyrinth ring (8) and an inner labyrinth ring (2) corresponding to the outer bearing chamber end cover (7) and the inner bearing chamber (4) end.

10. The taper bearing preload constant compensation device of claim 9, wherein: The bearing chamber (4) is provided with a lubricating oil inlet (6) and a lubricating oil outlet (11) in communication with the space where the bearing set (5) is arranged.

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