An auxiliary lifting tool for bearings

Abstract

This utility model discloses an auxiliary lifting tool for bearings. A first lifting retainer has at least one set of first left positioning holes a and first right positioning holes a, symmetrically distributed from left to right. A second lifting retainer has at least one set of second left positioning holes a and second right positioning holes a, symmetrically distributed from left to right. The first left positioning holes a, first right positioning holes a, second left positioning holes a, and second right positioning holes a are evenly spaced in a circular pattern and are used for fixed insertion connections with each lifting rod. Each lifting rod has a lifting ring installed at its upper end, and its lower end is fixedly inserted to connect to the bearing rolling elements. This utility model prevents the lifting rods from bending and deforming during lifting, and simultaneously achieves a fixed insertion connection between the lifting rods and the bearing rolling elements, resulting in high installation reliability and preventing the bearing from falling off during lifting. It is particularly suitable as a dedicated auxiliary lifting tool for the rolling elements of large four-row cylindrical roller bearings.

Description

Technical Field

[0001] This utility model belongs to the field of rolling mill equipment in strip steel production lines, and specifically relates to an auxiliary lifting tool for bearings, which is particularly suitable as a special auxiliary lifting tool for the rolling elements of large four-row cylindrical roller bearings. Background Technology

[0002] Bearings are crucial components in rolling mill structures. The use of four-row cylindrical roller bearings supplemented with thrust roller bearings is a widely adopted bearing configuration for the support rolls of plate rolling mills due to its advantages such as long bearing life and high reliability. During operation, fatigue spalling occurs on the surfaces of the inner and outer raceways and rolling elements under alternating loads. This fatigue spalling is the primary failure mode of bearings, followed by wear, pitting, plastic deformation, and cracking. Therefore, regular maintenance is essential for extending bearing life and ensuring optimal bearing performance.

[0003] Furthermore, in the bearing maintenance process, the four rows of cylindrical roller bearings must be disassembled and cleaned and inspected item by item. Since the rolling elements of the bearing are connected by a cage, the diameter can reach 881 mm and the weight can reach 300 kg. The lifting method used is to evenly distribute four lifting holes on the cage. Due to the limited space around the lifting holes, extended eye bolts are used to lift the bearing. However, during the lifting operation, the eye bolts are prone to bending and deformation due to the inclined plane tension. On the one hand, this leads to a very short life of the eye bolts. On the other hand, the deformation of the eye bolts can also cause bolt breakage accidents, resulting in personal injury and bearing scrapping accidents.

[0004] Therefore, the applicant urgently needs to find technical solutions to reasonably hoist the rolling elements of a four-row cylindrical roller bearing, improve the service life of hoisting tools, enhance bearing maintenance efficiency, and reduce safety risks. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an auxiliary lifting tool for bearings, which prevents the lifting rod from bending and deforming during lifting. At the same time, the lifting rod is fixedly inserted and connected to the bearing rolling elements, which ensures high installation reliability and prevents the bearing from falling off during lifting. Moreover, the auxiliary lifting tool proposed in this utility model has a simple structure, low cost, and is very easy to operate, transport, and store. It is especially suitable as a special auxiliary lifting tool for the rolling elements of large four-row cylindrical roller bearings.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An auxiliary lifting tool for bearings includes a first lifting retainer and a second lifting retainer that are arranged vertically and interlocked and installed as a single unit; wherein,

[0008] The intersection of the first and second lifting retainers is located directly above the center of the bearing to be lifted;

[0009] The first hoisting retainer has at least one set of first left positioning holes a and first right positioning holes a, which are symmetrically distributed on the left and right sides of the intersection position.

[0010] The second hoisting retainer has at least one set of second left positioning holes a and second right positioning holes a symmetrically distributed on the left and right sides of the intersection position;

[0011] The first left positioning hole a, the first right positioning hole a, the second left positioning hole a, and the second right positioning hole a are evenly spaced in a circular pattern and are used to be fixedly inserted and connected to each hoisting rod, respectively.

[0012] Each lifting rod has a lifting ring installed at its upper end and a bearing rolling element fixedly inserted at its lower end.

[0013] Preferably, the first hoisting retainer is further provided with at least one set of first left positioning holes b and first right positioning holes b symmetrically distributed on both its left and right sides; the second hoisting retainer is further provided with at least one set of second left positioning holes b and second right positioning holes b symmetrically distributed on both its left and right sides; wherein,

[0014] The first left positioning hole a, the first left positioning hole b, the first right positioning hole b and the first right positioning hole a are distributed in a straight line at intervals;

[0015] The second left positioning hole a, the second left positioning hole b, the second right positioning hole b and the second right positioning hole a are distributed in a straight line at intervals;

[0016] Furthermore, the first left positioning hole b, the first right positioning hole b, the second left positioning hole b, and the second right positioning hole b are evenly spaced in a circular shape, and are used to fix and insert with each hoisting rod respectively.

[0017] Preferably, the first hoisting retainer has at least one set of first left positioning holes c and first right positioning holes c symmetrically distributed on its left and right sides respectively; the second hoisting retainer has at least one set of second left positioning holes c and second right positioning holes c symmetrically distributed on its left and right sides respectively; wherein,

[0018] The first left positioning hole a, the first left positioning hole b, the first left positioning hole c, the first right positioning hole c, the first right positioning hole b and the first right positioning hole a are distributed in a straight line at intervals;

[0019] The second left positioning hole a, the second left positioning hole b, the second left positioning hole c, the second right positioning hole c, the second right positioning hole b and the second right positioning hole a are distributed in a straight line at intervals;

[0020] Furthermore, the first left positioning hole c, the first right positioning hole c, the second left positioning hole c, and the second right positioning hole c are evenly spaced in a circular shape, and are used for fixed insertion connection with each hoisting rod respectively.

[0021] Preferably, each lifting boom includes a lifting boom unit, wherein,

[0022] The upper end of the lifting rod unit is provided with a threaded hole, through which it is fixedly connected to another lifting rod unit or lifting ring;

[0023] The lower end of the lifting rod unit is provided with an external thread for fixed insertion connection with the bearing rolling element or fixed installation connection with another lifting rod unit.

[0024] Preferably, the lifting rod unit includes a long lifting rod unit and a short lifting rod unit of unequal length; wherein, the upper end of the long lifting rod unit is provided with a threaded hole, and is fixedly connected to the short lifting rod unit or the lifting ring through the threaded hole; the lower end of the long lifting rod unit is provided with an external thread, for fixed insertion connection with the bearing rolling element or fixed installation connection with the short lifting rod unit.

[0025] Preferably, the upper end face of the bearing rolling element is provided with at least four threaded positioning holes that are evenly spaced in a circular pattern, which are used for fixed insertion connection with the lower end of the corresponding lifting rod.

[0026] Preferably, the first lifting retainer and the second lifting retainer have the same structure and are elongated in shape.

[0027] Preferably, the thickness of both the first and second lifting retainers is 8-12 mm; wherein,

[0028] The first lifting retainer is positioned above the second lifting retainer; the first lifting...

[0029] The length of the lifting rod corresponding to the first lifting retainer is greater than the length of the lifting rod corresponding to the second lifting retainer, and the difference between the two is equal to the thickness of the second lifting retainer.

[0030] Preferably, the first lifting retainer and the second lifting retainer are both provided with cross mounting holes at their intersection positions, and the cross mounting combination connection between the first lifting retainer and the second lifting retainer is achieved by screws and nuts engaging with the cross mounting holes for fixed installation.

[0031] Preferably, the lifting eye is a national standard lifting eye bolt with a thread diameter of M16. Each lifting eye is connected to the lifting strap of the overhead crane through a shackle, and the bearing rolling elements are lifted and transported by the overhead crane.

[0032] This invention provides an auxiliary lifting tool for bearings, consisting of a first and second lifting retainer arranged vertically and installed as a single unit, lifting rods, and lifting rings. In practical applications, the first and second lifting retainers ensure that the lifting rods remain vertical, preventing bending and deformation during lifting. The lifting rods are also fixedly connected to the bearing rolling elements via a threaded connection, ensuring high installation reliability and preventing the bearing from falling off during lifting. Furthermore, this auxiliary lifting tool is simple in structure, low in cost, and very easy to operate, transport, and store, making it particularly suitable as a dedicated auxiliary lifting tool for the rolling elements of large four-row cylindrical roller bearings.

[0033] Based on the above structure, this application also features a positioning hole group that allows selection of the appropriate lifting retainer according to the bearing's outer diameter specifications (specifically corresponding to the threaded positioning hole size on the upper end face of the bearing rolling element). This ensures precise and reliable positioning and good versatility. Furthermore, this application also features a splicable lifting rod unit structure, as well as splicable long and short lifting rod units. The required lifting rod length can be selected based on the height of the threaded positioning hole on the upper end face of the bearing rolling element from the bearing housing, further enhancing versatility. Attached Figure Description

[0034] Figure 1 This is a structural schematic diagram of the auxiliary hoisting tool according to a specific embodiment of this utility model;

[0035] Figure 2 This is a structural schematic diagram of the auxiliary hoisting tool in use under a specific embodiment of this utility model;

[0036] Figure 3 This is a schematic diagram of the installation and connection structure of the hoisting long pole unit and the hoisting short pole unit in a specific embodiment of this utility model. Detailed Implementation

[0037] This utility model discloses an auxiliary lifting tool for bearings, including a first lifting retainer and a second lifting retainer that are arranged vertically and intersectingly and installed as a single unit. The intersection of the first and second lifting retainers is located directly above the center of the bearing to be lifted. The first lifting retainer has at least one set of first left positioning holes a and first right positioning holes a symmetrically distributed on the left and right sides of the intersection. The second lifting retainer has at least one set of second left positioning holes a and second right positioning holes a symmetrically distributed on the left and right sides of the intersection. The first left positioning holes a, first right positioning holes a, second left positioning holes a, and second right positioning holes a are evenly spaced in a circular shape and are used for fixed insertion and connection with each lifting rod. A lifting ring is installed and connected to the upper end of each lifting rod, and the bearing rolling element is fixedly inserted and connected to its lower end.

[0038] To enable those skilled in the art to better understand the technical solutions of this utility model, 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 only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0039] Please see Figure 1 and Figure 2 As shown, an auxiliary lifting tool for bearings includes a first lifting retainer 10 and a second lifting retainer 20 that are arranged vertically and mounted as a single unit; wherein,

[0040] The first lifting retainer 10 and the second lifting retainer 20 are located directly above the center of the bearing to be lifted (i.e., the bearing rolling element 30). The first lifting retainer 10 has a set of first left positioning holes a11 and first right positioning holes a12 symmetrically distributed on the left and right sides of the intersection. The second lifting retainer 20 has a set of second left positioning holes a21 and second right positioning holes a22 symmetrically distributed on the left and right sides of the intersection. The first left positioning holes a11, first right positioning holes a12, second left positioning holes a21 and second right positioning holes a22 are evenly spaced in a circular shape and are used to fix and insert with each lifting rod 40. Each lifting rod 40 has a lifting ring 50 installed and connected at its upper end, and its lower end is fixedly inserted and connected to the bearing rolling element 30.

[0041] Preferably, in this embodiment, the first lifting retainer 10 is further provided with a set of first left positioning holes b13 and first right positioning holes b14 symmetrically distributed on its left and right sides; and another set of first left positioning holes c15 and first right positioning holes c16 symmetrically distributed on its left and right sides; the second lifting retainer 20 is further provided with a set of second left positioning holes b23 and second right positioning holes b24 symmetrically distributed on its left and right sides; and another set of second left positioning holes c25 and second right positioning holes c26 symmetrically distributed on its left and right sides; wherein,

[0042] The first left positioning holes a11, b13, c15, c16, b14, and a12 are linearly spaced; the second left positioning holes a21, b23, c25, c26, b24, and a22 are linearly spaced; and the first left positioning holes b13, b14, b23, and b24 are evenly spaced in a circular pattern, used for fixed insertion connection with each hoisting rod; the first left positioning holes c15, c16, c25, and c26 are evenly spaced in a circular pattern, used for fixed insertion connection with each hoisting rod 40.

[0043] Preferably, in this embodiment, the upper end face of the bearing rolling element 30 (which is a known structure, i.e., the outer ring or inner ring of the bearing) is provided with four threaded positioning holes 31 that are evenly spaced in a circular shape, which are used to make threaded fixed insertion connections with the lower end of the corresponding lifting rod 40.

[0044] Preferably, in this embodiment, the first lifting retainer 10 and the second lifting retainer 20 have the same structure and are elongated, specifically elongated. More preferably, in this embodiment, the thickness of both the first lifting retainer 10 and the second lifting retainer 20 is 8-12mm (specifically 10mm in this embodiment). The first lifting retainer 10 is positioned above the second lifting retainer 20. The length of the lifting rod corresponding to the first lifting retainer 10 is greater than the length of the lifting rod corresponding to the second lifting retainer 20, and the difference between the two is equal to the thickness of the second lifting retainer 20.

[0045] Preferably, in this embodiment, the first lifting retainer 10 and the second lifting retainer 20 are both provided with cross mounting holes 60 at their intersection positions. The cross mounting combination connection between the first lifting retainer 10 and the second lifting retainer 20 is achieved by the fixed installation cooperation of M16 screws (not shown) and nuts (not shown) with the cross mounting holes 60.

[0046] Preferably, in this embodiment, each lifting rod 40 includes a lifting rod unit, wherein the upper end of the lifting rod unit is provided with a threaded hole, through which it is fixedly connected to another lifting rod unit or a lifting ring; the lower end of the lifting rod unit is provided with an external thread, for fixed insertion connection with the bearing rolling element or fixed installation connection with another lifting rod unit; further preferably, please refer to Figure 3As shown, in this embodiment, the lifting rod unit includes lifting long rod units 41 and lifting short rod units 42 of unequal lengths; wherein, the upper end of the lifting long rod unit 41 is provided with a threaded hole 43, which is used to fix and connect to the lifting short rod unit 42 or the lifting ring 50; the lower end of the lifting long rod unit 41 is provided with an external thread 44, which is used to fix and connect to the bearing rolling element 30 or to the lifting short rod unit 42; specifically preferably, in this embodiment, the first lifting retainer 10 is provided with two first lifting long rod units 41, each with a length of 290mm; the lower end of each first lifting long rod unit 41 is fixedly connected to two lifting short rod units 42, each with a length of 150mm; the second lifting retainer 20 is provided with two second lifting long rod units 41, each with a length of 280mm; the lower end of each second lifting long rod unit 41 is fixedly connected to two lifting short rod units 42, each with a length of 150mm.

[0047] Please refer to the above. Figure 3 As shown, preferably, in this embodiment, the lifting eye 50 uses a national standard lifting eye bolt with a thread diameter of M16, and each lifting eye 50 is connected to the overhead crane's lifting strap 51 via a shackle (a known structure, not shown in the figure). Figure 3 The arrows in the diagram indicate the direction of force on the sling 51 during the hoisting process. The hoisting of the bearing rolling elements 30 is achieved by using an overhead crane.

[0048] This embodiment provides an auxiliary lifting tool for bearings, consisting of a first lifting retainer 10 and a second lifting retainer 20 arranged vertically and installed as a single unit, lifting rods 40, and lifting rings 50. In actual lifting applications, the first and second lifting retainers 10 and 20 ensure that each lifting rod 40 remains in a vertical lifting state, preventing bending and deformation during lifting. Simultaneously, the lifting rods 40 are fixedly threaded to the bearing rolling elements 30, ensuring high installation reliability and preventing the bearing from falling off during lifting. Furthermore, the auxiliary lifting tool proposed in this embodiment has a simple structure, low cost, and is very easy to operate, transport, and store, making it particularly suitable as a dedicated auxiliary lifting tool for the rolling elements of large four-row cylindrical roller bearings.

[0049] Based on the above structure, this embodiment also features a specially designed positioning hole group for the appropriate lifting retainer 10, 20, which can be selected according to the outer diameter of the bearing (specifically corresponding to the size of the threaded positioning hole 31 on the upper end face of the bearing rolling element 30). This ensures accurate and reliable positioning and good versatility. In addition to the above structure, this application also features a splicable lifting rod unit structure, as well as a splicable long lifting rod unit 41 and a short lifting rod unit 42 structure. The required lifting rod length can be selected according to the height of the threaded positioning hole 31 on the upper end face of the bearing rolling element 30 from its bearing seat, resulting in good versatility.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An auxiliary lifting tool for bearings, characterized in that, It includes a first lifting retainer and a second lifting retainer that are arranged vertically and intersectingly and installed as a single unit; wherein, The intersection of the first and second lifting retainers is located directly above the center of the bearing to be lifted; The first hoisting retainer has at least one set of first left positioning holes a and first right positioning holes a, which are symmetrically distributed on the left and right sides of the intersection position. The second hoisting retainer has at least one set of second left positioning holes a and second right positioning holes a symmetrically distributed on the left and right sides of the intersection position; The first left positioning hole a, the first right positioning hole a, the second left positioning hole a, and the second right positioning hole a are evenly spaced in a circular pattern and are used to be fixedly inserted and connected to each hoisting rod, respectively. Each lifting rod has a lifting ring installed at its upper end and a bearing rolling element fixedly inserted at its lower end.

2. The auxiliary lifting tool for the bearing according to claim 1, characterized in that, The first hoisting retainer has at least one set of first left positioning holes b and first right positioning holes b symmetrically distributed on its left and right sides respectively; the second hoisting retainer has at least one set of second left positioning holes b and second right positioning holes b symmetrically distributed on its left and right sides respectively; wherein... The first left positioning hole a, the first left positioning hole b, the first right positioning hole b and the first right positioning hole a are distributed in a straight line at intervals; The second left positioning hole a, the second left positioning hole b, the second right positioning hole b and the second right positioning hole a are distributed in a straight line at intervals; Furthermore, the first left positioning hole b, the first right positioning hole b, the second left positioning hole b, and the second right positioning hole b are evenly spaced in a circular shape, and are used to fix and insert with each hoisting rod respectively.

3. The auxiliary lifting tool for the bearing according to claim 2, characterized in that, The first hoisting retainer has at least one set of first left positioning holes c and first right positioning holes c symmetrically distributed on its left and right sides respectively; the second hoisting retainer has at least one set of second left positioning holes c and second right positioning holes c symmetrically distributed on its left and right sides respectively; wherein... The first left positioning hole a, the first left positioning hole b, the first left positioning hole c, the first right positioning hole c, the first right positioning hole b and the first right positioning hole a are distributed in a straight line at intervals; The second left positioning hole a, the second left positioning hole b, the second left positioning hole c, the second right positioning hole c, the second right positioning hole b and the second right positioning hole a are distributed in a straight line at intervals; Furthermore, the first left positioning hole c, the first right positioning hole c, the second left positioning hole c, and the second right positioning hole c are evenly spaced in a circular shape, and are used for fixed insertion connection with each hoisting rod respectively.

4. The auxiliary lifting tool for the bearing according to claim 1, characterized in that, Each lifting boom includes a lifting boom unit, wherein, The upper end of the lifting rod unit is provided with a threaded hole, through which it is fixedly connected to another lifting rod unit or lifting ring; The lower end of the lifting rod unit is provided with an external thread for fixed insertion connection with the bearing rolling element or fixed installation connection with another lifting rod unit.

5. The auxiliary lifting tool for the bearing according to claim 4, characterized in that, The lifting rod unit includes a long lifting rod unit and a short lifting rod unit of unequal length; wherein, the upper end of the long lifting rod unit is provided with a threaded hole, through which it is fixedly connected to the short lifting rod unit or the lifting ring; the lower end of the long lifting rod unit is provided with an external thread, for fixed insertion connection with the bearing rolling element or fixed installation connection with the short lifting rod unit.

6. The auxiliary lifting tool for the bearing according to claim 1, 2, 3, 4, or 5, characterized in that, The upper end face of the bearing rolling element is provided with at least four threaded positioning holes that are evenly spaced in a circular shape, which are used for fixed insertion connection with the lower end of the corresponding lifting rod.

7. The auxiliary lifting tool for the bearing according to claim 1, characterized in that, The first and second hoisting retainers have the same structure and are elongated in shape.

8. The auxiliary lifting tool for the bearing according to claim 1 or 7, characterized in that, The thickness of both the first and second lifting retainers is 8-12mm; wherein, The first lifting retainer is positioned above the second lifting retainer; the first lifting... The length of the lifting rod corresponding to the first lifting retainer is greater than the length of the lifting rod corresponding to the second lifting retainer, and the difference between the two is equal to the thickness of the second lifting retainer.

9. The auxiliary lifting tool for the bearing according to claim 1, characterized in that, The first and second lifting retainers are both provided with cross mounting holes at their intersection positions. The cross mounting combination connection between the first and second lifting retainers is achieved by screws and nuts engaging with the cross mounting holes.

10. The auxiliary lifting tool for the bearing according to claim 1, characterized in that, The lifting eye uses a national standard lifting eye bolt with a thread diameter of M16. Each lifting eye is connected to the lifting strap of the overhead crane through a shackle, and the overhead crane is used to lift the rolling elements of the bearing.

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