Tapered roller bearing pre-tightening device and calender
By using the self-aligning motion of the outer pressure ring assembly and adjusting the fasteners, the problem of uneven force on the circumference is solved, achieving uniform preload and extended lifespan of the bearing.
Patent Information
- Application Number
- CN202520115652.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In the prior art, due to processing and assembly errors on the end cap extrusion surface, uneven force is applied to various points on the circumference, which shortens the service life of the bearing.
An external pressure ring assembly is adopted, including a first external pressure ring and a second external pressure ring. By the misalignment between the first adjustment surface and the second adjustment surface, the preload pressure is evenly transmitted to the outer ring, thereby achieving uniform preload of the tapered roller bearing assembly.
The self-aligning motion achieves a uniform distribution of preload pressure, extending the service life of the bearing, and the magnitude of the preload pressure can be controlled by adjusting the fasteners.
Smart Images
Figure CN223690206U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bearing pre -tightening technical field, concretely relates to a tapered roller bearing pre -tightening device and calender. BACKGROUND
[0002] The dry calender is a kind of equipment that multiple roller continuous calendering film is formed, and diaphragm is thinned gradually.Because the calendering roller needs to bear the force in two directions, all need to pre -tighten the bearing supporting the calendering roller.
[0003] To realize the pre -tightening of calendering roller, a pair of back-to-back arranged tapered roller bearings is usually used, and the inner ring or outer ring of tapered roller bearing is extruded by end cover, realizes the pre -tightening between two tapered roller bearings, but due to the machining error of end cover extrusion surface, and the assembly error is added, it is easy to make the stress uneven on each point on circumference when bearing pre -tightening, leading to shorten the service life of bearing. UTILITY MODEL CONTENTS
[0004] Therefore, the utility model provides a tapered roller bearing pre -tightening device and calender to solve the problem that the inner ring or outer ring of tapered roller bearing is extruded by end cover, realizes the pre -tightening between two tapered roller bearings, but due to the machining error of end cover extrusion surface, and the assembly error is added, it is easy to make the stress uneven on each point on circumference when bearing pre -tightening, leading to shorten the service life of bearing.
[0005] Firstly, the utility model provides a kind of tapered roller bearing pre -tightening device, comprising:
[0006] Outer pressure ring assembly, the outer pressure ring assembly includes first outer pressure ring and second outer pressure ring, the first end face of the first outer pressure ring is adapted to the outer ring end face of tapered roller bearing group, first adjusting surface is equipped with in the first outer pressure ring away from the first end face, second adjusting surface is equipped with in the second outer pressure ring, second end face is equipped with in the second outer pressure ring away from the second adjusting surface, the first adjusting surface and the second adjusting surface are attached, the second end face is subjected to pre -tightening pressure and is transferred to second outer pressure ring, the first adjusting surface and the second adjusting surface occur dislocation, and the pre -tightening pressure is evenly transferred to the end face of the outer ring by the first outer pressure ring.
[0007] By the dislocation between first adjusting surface and second adjusting surface, the self-aligning motion of second outer pressure ring occurs, so that the pre -tightening pressure is evenly transferred to first outer pressure ring, and then the uniformly distributed pre -tightening pressure is received in the outer ring of tapered roller bearing group in circumferential direction, thereby prolonging the service life of bearing.
[0008] In an alternative embodiment, the central axis of the first outer pressure ring, the central axis of the second outer pressure ring and the central axis of the tapered roller bearing set are coincident, the projection of the first adjusting surface on a plane perpendicular to the central axis of the first outer pressure ring is annular, and the projection of the second adjusting surface on a plane perpendicular to the central axis of the second outer pressure ring is annular.
[0009] In an alternative embodiment, the first adjusting surface is concave, and the second adjusting surface is convex, or the first adjusting surface is convex, and the second adjusting surface is concave, and the first adjusting surface and the second adjusting surface are in spherical contact.
[0010] In an alternative embodiment, the pre-tightening device further comprises a gland assembly, the second end surface abuts against a first gland, the first gland is provided with at least three fastening holes, the fastening holes are arranged at equal angles around the central axis of the first gland, a first fastener is arranged in each fastening hole, the first fastener is threadedly connected with the fastening hole, and the end of the first fastener abuts against the second end surface.
[0011] In an alternative embodiment, the pre-tightening device further comprises a second fastener, the outer periphery of the outer ring is adapted to be sleeved with a bearing seat, and the first gland and the bearing seat are fixedly connected through the second fastener.
[0012] In an alternative embodiment, the gland assembly further comprises a second gland, the first gland and the second gland are arranged on the two sides of the bearing seat respectively, and the abutting portion of the second gland is in contact with the outer ring end surface of the tapered roller bearing set.
[0013] In an alternative embodiment, the pre-tightening device further comprises a third fastener, the second gland and the bearing seat are fixedly connected through the third fastener.
[0014] In an alternative embodiment, the pre-tightening device further comprises an inner pressure ring assembly, the inner pressure ring assembly comprises an inner ring and a locking ring, the first gland and the inner ring are located on the same side of the tapered roller bearing set, one end of the inner ring abuts against the inner ring of the tapered roller bearing set, and the other end of the inner pressure ring abuts against the end surface of the locking ring.
[0015] In a second aspect, the utility model also provides a calender, which comprises the tapered roller bearing pre-tightening device.
[0016] In an alternative embodiment, the pre-tightening device further comprises a calender shaft, and the first end cover is sleeved on the outer periphery of the journal of the calender shaft.
[0017] The conical roller bearing pre-tightening device has the following advantages: (1) the spherical contact of the first outer pressure ring and the second outer pressure ring enables the second outer pressure ring to perform self-aligning movement, so that the pre-tightening pressure is uniformly transmitted to the first outer pressure ring, and then the first outer pressure ring uniformly presses the end face of the conical roller bearing group, thereby prolonging the service life of the bearing; (2) the first fastener is adjustably connected with the fastening hole through the threaded connection, and the pre-tightening pressure applied to the second outer pressure ring is controlled by adjusting the first fastener; and (3) the inner pressure ring assembly is arranged to fix the inner ring by cooperation of the locking member and the calender shaft. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0019] Figure 1 It is a front view of the calender shaft cooperating with the conical roller bearing pre-tightening device of the embodiment of the present application.
[0020] Figure 2 It is a schematic view of the calender shaft cooperating with the conical roller bearing pre-tightening device of the embodiment of the present application.
[0021] Figure 3 It is a front view of the first outer pressure ring and the second outer pressure ring cooperating with each other.
[0022] Figure 4 It is a side view of the first pressure cover of the embodiment of the present application.
[0023] Figure 5 It is a sectional view of the second pressure cover of the embodiment of the present application.
[0024] Explanation of reference signs: 1, outer pressure ring assembly; 101, first outer pressure ring; 1011, first end face; 1012, first adjusting face; 102, second outer pressure ring; 1021, second end face; 1022, second adjusting face; 2, conical roller bearing group; 201, first conical roller bearing; 202, second conical roller bearing; 203, outer ring; 204, inner ring; 3, bearing seat; 4, inner pressure ring assembly; 401, inner ring; 402, locking ring; 5, pressure cover assembly; 501, first pressure cover; 5011, fastening hole; 5012, first mounting hole; 502, second pressure cover; 5021, abutting portion; 5022, second mounting hole; 503, first fastener; 504, second fastener; 505, third fastener; 6, calender shaft. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of 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 work fall within the scope of the present application.
[0026] The embodiments of the present application will be described below in conjunction with Figures 1 to 5 .
[0027] According to the embodiments of the present application, on the one hand, a tapered roller bearing pre-tightening device is provided, comprising:
[0028] The outer pressure ring assembly 1 comprises a first outer pressure ring 101 and a second outer pressure ring 102. The first end face 1011 of the first outer pressure ring 101 is adapted to the outer ring 203 end face of the tapered roller bearing set 2. The first outer pressure ring 101 is provided with a first adjusting face 1012 opposite to the first end face 1011. The second outer pressure ring 102 is provided with a second adjusting face 1022. The second outer pressure ring 102 is provided with a second end face 1021 opposite to the second adjusting face 1022. The first adjusting face 1012 and the second adjusting face 1022 are arranged in abutment. The second end face 1021 is subjected to a pre-tightening pressure transmitted to the second outer pressure ring 102. The first adjusting face 1012 and the second adjusting face 1022 are dislocated, so that the pre-tightening pressure is uniformly transmitted to the end face of the outer ring 203 through the first outer pressure ring 101.
[0029] The first adjusting face 1012 and the second adjusting face 1022 are dislocated, so that the second outer pressure ring 102 is subjected to self-aligning motion. The pre-tightening pressure is uniformly transmitted to the first outer pressure ring 101, so that the outer ring 203 of the tapered roller bearing set 2 is subjected to uniformly distributed pre-tightening pressure in the circumferential direction, thereby prolonging the service life of the bearing.
[0030] In one embodiment, as Figure 1 , Figure 2 and Figure 3As shown, the center axis of the first outer pressure ring 101, the center axis of the second outer pressure ring 102 and the center axis of the tapered roller bearing set 2 coincide, the projection of the first adjusting surface 1012 on the plane perpendicular to the center axis of the first outer pressure ring 101 is annular, the projection of the second adjusting surface 1022 on the plane perpendicular to the center axis of the second outer pressure ring 102 is annular, and the annular projection of the two can realize the adjustment between the first adjusting surface 1012 and the second adjusting surface 1022 in the circumferential direction, realize the dislocation of the first outer pressure ring 101 and the second outer pressure ring 102, and uniformly press the tapered roller bearing set 2 with the center axis of the first outer pressure ring 101 as the center.
[0031] In one embodiment, as shown in Figure 1 , Figure 2 and Figure 3 , the first adjusting surface 1012 is a concave arc surface, and the second adjusting surface 1022 is a convex arc surface. The first adjusting surface 1012 and the second adjusting surface 1022 are in spherical surface contact. The first adjusting surface 1012 of the first outer pressure ring 101 and the second adjusting surface 1022 of the second outer pressure ring 102 are mutually paired spherical surfaces, so that the first outer pressure ring 101 and the second outer pressure ring 102 have a self-centering function. When the second outer pressure ring 102 is subjected to a pre-tightening pressure, the pre-tightening pressure can be uniformly distributed on the end surface of the outer ring 203 of the tapered roller bearing set 2 through the first outer pressure ring 101.
[0032] In one embodiment, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the pressure cover assembly 5 further comprises a first pressure cover 501 abutting against the second end surface 1021, and the first pressure cover 501 is provided with at least three fastening holes 5011 arranged at equal radian with the center axis of the first pressure cover 501 as the center. A first fastener 503 is arranged in the fastening hole 5011 and is threadedly connected with the fastening hole 5011, that is, the first fastener 503 moves by thread rotation in the fastening hole 5011 to abut the end of the first fastener 503 against the second end surface 1021. Specifically, the first fastener 503 is a bolt with a counterbore (the position of the bolt is adjusted by the counterbore), the fastening hole 5011 is an internally threaded hole, and the first fastener 503 and the fastening hole 5011 are threadedly connected. By the connection of the two, at least three fastening holes 5011 (three points determine a plane) are arranged to apply uniform pre-tightening pressure on the second end surface 1021. As shown in Figure 4 , the number of fastening holes 5011 is ten.
[0033] In one embodiment, as shown in Figure 1 , Figure 2 , Figure 3 andFigure 4 As shown, the outer peripheral surface of the outer ring 203 is adapted to be sleeved with the bearing seat 3, the first gland 501 and the bearing seat 3 are fixedly connected through the second fastener 504, the fixed connection between the first gland 501 and the bearing seat 3 is realized through the second fastener 504, and the pre-tightening pressure applied to the second end surface 1021 is adjusted by rotating the first fastener 503 after the first gland 501 is fixed with the bearing seat 3. In the embodiment, as shown in the figure, Figure 4 As shown, twelve first mounting holes 5012 are arranged on the first gland 501, one first mounting hole 5012 is provided with one second fastener 504, and the number of the second fasteners 504 is twelve.
[0034] In an embodiment, as shown in the figure, Figure 1 , Figure 2 , Figure 3 As shown, the gland assembly 5 further comprises a second gland 502, the first gland 501 and the second gland 502 are arranged on the two sides of the bearing seat 3 respectively, the abutting portion 5021 of the second gland 502 is in abutment with the end surface of the outer ring 203 of the tapered roller bearing set 2, and the other end surface of the outer ring 203 of the tapered roller bearing set 2 is fixed through the abutting portion 5021 of the second gland 502.
[0035] In an embodiment, as shown in the figure, Figure 1 , Figure 2 , Figure 3 As shown, the third fastener 505 is further arranged, the second gland 502 and the bearing seat 3 are fixedly connected through the third fastener 505, the bearing seat 3 and the second gland 502 are fixed by the third fastener 505, and the first gland 501 and the second gland 502 are arranged on the two sides of the bearing seat 3 respectively to limit any movement of the bearing seat 3.
[0036] In an embodiment, as shown in the figure, Figure 1 , Figure 2 As shown, the inner pressure ring assembly 4 further comprises an inner ring 401 and a locking ring 402, the first gland 501 and the inner ring 401 are located on the same side of the tapered roller bearing set 2, one end of the inner ring 401 is in abutment with the inner ring 204 of the tapered roller bearing set 2, and the other end of the inner ring 401 is in abutment with the end surface of the locking ring 402. The inner ring 401 limits the inner ring 204 of the tapered roller bearing set 2, and the locking ring 402 plays a locking role. In the embodiment, the inner ring 401 is a gasket, the locking ring 402 is a nut, the locking ring 402 is threadedly connected with the rolling shaft 6, a uniform force is applied to the inner ring 204 of the tapered roller bearing set 2 through the locking ring 402, the locking ring 402 cooperates with the outer pressure ring assembly 1 to ensure that the tapered roller bearing set 2 is uniformly stressed, and the inner ring 401 plays a buffering role.
[0037] A calender machine comprises the conical roller bearing pre-tightening device as described above, and further comprises a calender shaft 6, wherein a first end cover is sleeved on the outer circumferential surface of the shaft neck of the calender shaft 6.
[0038] In the embodiment, as shown in Figure 1 、 Figure 2 , one side of the calender shaft 6 is provided with a conical roller bearing set 2, i.e., a set comprising a first conical roller bearing and a second conical roller bearing 202, both of which are sleeved on the shaft neck of the calender shaft 6, the outer ring 203 of the conical roller bearing set 2 is sleeved in the bearing seat 3, the second pressing cover 502 is located on one side of the bearing seat 3, and the second pressing cover 502 is arranged in the direction of the shaft body and has a gap with the outer circumferential surface of the calender shaft 6. As shown in Figure 1 、 Figure 2 , the inner pressing ring assembly 4, the outer pressing ring assembly 1 and the first pressing cover 501 are located on the other side of the bearing seat 3, the inner pressing ring assembly 4 is located in the space between the first pressing cover 501 and the stroke of the calender shaft 6, and the locking ring 402 is threadedly connected between the inner pressing ring assembly 4 and the calender shaft 6. The inner ring 401 has a gap with the outer pressing ring assembly 1, the locking ring 402 has a gap with the outer pressing ring assembly 1, and the first pressing cover 501 has a gap with the outer circumferential surface of the calender shaft 6.
[0039] A mounting method of a conical roller bearing pre-tightening device, comprising the following steps:
[0040] 1) The second pressing cover 502 is fixedly connected to the bearing seat 3 through the third fastener 505, and the outer ring 203 of the first conical roller bearing 201 is assembled into the bearing seat 3 until the outer ring 203 of the first conical roller bearing 201 abuts against the abutting portion 5021 of the second pressing cover 502;
[0041] 2) The assembled assembly is sleeved on the calender roll, the inner ring 401 and the locking ring 402 are sleeved on the outer circumferential surface of the calender roll in sequence, the inner ring 401 is adjusted to abut against the end surface of the inner ring 204 of the second conical roller bearing 202 through the locking ring 402;
[0042] 3) The outer ring 203 of the second conical roller bearing 202, the first outer pressing ring 101 and the second outer pressing ring 102 are sequentially assembled, and the first pressing cover 501 is fixed to the bearing seat 3 through the second fastener 504;
[0043] 4) The first fastener 503 is placed in the fastening hole 5011, and the first fastener 503 is not tightened, but only the first fastener 503 is screwed to just contact the second outer pressing ring 102;
[0044] 5) using a torque wrench, slowly screw the first fastener 503 to the required tightening force, it should be noted that, in the process of this step, to ensure that all the first fastener 503 screw into the depth of uniformity, to ensure that the first outer ring 101 is in the controllable alignment range.
[0045] The conical roller bearing pre-tightening device has the following advantages: (1) the spherical contact of the first outer ring 101 and the second outer ring 102 enables the second outer ring 102 to perform self-aligning movement, so as to uniformly transmit the pre-tightening pressure to the first outer ring 101, and then the first outer ring 101 uniformly presses the end face of the conical roller bearing set 2, thereby prolonging the service life of the bearing; (2) the threaded connection of the first fastener 503 and the fastening hole 5011 realizes the adjustability of the first fastener 503, and the pre-tightening pressure applied to the second outer ring 102 is controlled by adjusting the first fastener 503; (3) the inner ring assembly 4 is arranged, and the inner ring 204 is fixed by the cooperation of the locking member and the stretching shaft 6.
[0046] As an alternative embodiment, the first adjusting surface 1012 is a convex arc surface, and the second adjusting surface 1022 is a concave arc surface, and the first adjusting surface 1012 and the second adjusting surface 1022 are in spherical surface contact.
[0047] As an alternative embodiment, the number of fastening holes 5011 can also be three, four, five or even more.
[0048] As an alternative embodiment, the number of second fasteners 504 can also be three, four, five or even more.
[0049] Although the embodiments of the utility model are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A conical roller bearing preloading device, characterized in that, The application relates to an outer pressure ring assembly (1) comprising a first outer pressure ring (101) and a second outer pressure ring (102), a first end surface (1011) of the first outer pressure ring (101) being adapted to abut an end surface of an outer ring (203) of a tapered roller bearing set (2), the first outer pressure ring (101) being provided with a first adjusting surface (1012) facing away from the first end surface (1011), the second outer pressure ring (102) being provided with a second adjusting surface (1022), the second outer pressure ring (102) being provided with a second end surface (1021) facing away from the second adjusting surface (1022), the first adjusting surface (1012) and the second adjusting surface (1022) being arranged in abutment, the second end surface (1021) being subjected to a pre-tightening pressure which is transmitted to the second outer pressure ring (102), a misalignment between the first adjusting surface (1012) and the second adjusting surface (1022) causes the pre-tightening pressure to be uniformly transmitted to the end surface of the outer ring (203) via the first outer pressure ring (101). The center axis of the first outer pressure ring (101), the center axis of the second outer pressure ring (102) and the center axis of the tapered roller bearing set (2) coincide, the projection of the first adjusting surface (1012) on a plane perpendicular to the center axis of the first outer pressure ring (101) is annular, and the projection of the second adjusting surface (1022) on a plane perpendicular to the center axis of the second outer pressure ring (102) is annular.
2. The tapered roller bearing pre-load device of claim 1, wherein, The first adjusting surface (1012) is a concave arc surface, and the second adjusting surface (1022) is a convex arc surface, or the first adjusting surface (1012) is a convex arc surface, and the second adjusting surface (1022) is a concave arc surface, and the first adjusting surface (1012) and the second adjusting surface (1022) are in spherical surface contact.
3. The tapered roller bearing pre-load device of claim 2, wherein, The application further relates to a gland assembly (5) comprising a first gland (501), the second end surface (1021) abutting against the first gland (501), the first gland (501) being provided with at least three fastening holes (5011) arranged at equal angles with the center axis of the first gland (501) as the center, the fastening holes (5011) being provided with first fasteners (503), the first fasteners (503) being threadedly connected with the fastening holes (5011), and the end of the first fastener (503) abutting against the second end surface (1021).
4. The tapered roller bearing pre-load device of claim 3, wherein, The gland assembly (5) further comprises a second fastener (504), the outer circumferential surface of the outer ring (203) being adapted to be sleeved with a bearing seat (3), and the first gland (501) and the bearing seat (3) being fixedly connected through the second fastener (504).
5. The tapered roller bearing pre-load device of claim 4, wherein, The gland assembly (5) further comprises a second gland (502), the first gland (501) and the second gland (502) being arranged on the two sides of the bearing seat (3) respectively, and the abutting part (5021) of the second gland (502) abutting against the end surface of the outer ring (203) of the tapered roller bearing set (2).
6. The tapered roller bearing pre-load device of claim 5, wherein, 7. The tapered roller bearing pre-load device of claim 6, wherein, Further comprising a third fastener (505), the second gland (502) and the bearing housing (3) are fixedly connected through the third fastener (505).
8. The tapered roller bearing pre-load device of claim 7, wherein, Further comprising an inner pressure ring assembly (4), the inner pressure ring assembly (4) comprises an inner ring (401) and a locking ring (402), the first gland (501) and the inner ring (401) are located on the same side of the tapered roller bearing set (2), one end of the inner ring (401) abuts against the inner ring (204) of the tapered roller bearing set (2), and the other end of the inner pressure ring abuts against the end face of the locking ring (402).
9. A calender characterized by, The tapered roller bearing pre-tightening device of any one of claims 1-8.
10. The calender of claim 9, wherein, Further comprising a calender shaft (6), a first end cover is sleeved on the outer circumferential surface of the shaft neck of the calender shaft (6).