T-shaped inner ring bearing for enhancing load

Abstract

The T-shaped inner ring bearing capable of enhancing the load comprises an outer ring, an inner ring, a retainer, a sealing ring and a steel ball, and annular protrusions are arranged on the peripheries of the two axial ends of the inner ring respectively; the outer diameter of the outer ring is 119.2 mm, and the axial thickness of the outer ring is 34 mm; the inner diameter of the inner ring is 55 mm, the axial thickness of the inner ring is 30 mm, the axial height of the annular protrusion is 2.5 mm, and the inner diameter of the inner side of the annular protrusion is 70.2 mm. And the radius of the annular channel of the outer ring and the inner ring is 6mm. The bearing has the advantages that the structure is changed into a double-row-ball structure, the diameter of the steel balls is reduced, the number of the steel balls is increased, and the bearing capacity of the bearing is improved by fully utilizing the mounting height of the inner ring and increasing the wall thickness of the ferrule; according to the T-shaped inner ring double-row ball structure, the two ends of the outer circle of the inner ring extend outwards to form the bosses, the diameter of the rolling body is increased, the load of the optimal design is increased, and all design advance elements are met.

Description

Technical Field

[0001] The invention relates to the field of ball bearings, and in particular to a T-shaped inner ring bearing with enhanced load. Background Art

[0002] Deep groove ball bearings have the characteristics of simple structure, high precision, small friction coefficient, but general load-bearing capacity. Deep groove ball bearings are generally composed of outer ring, inner ring, cage, seal ring, and steel ball; the main internal force-bearing parts are the steel ball and the groove part of the inner and outer rings, and the seal ring is not subjected to force.

[0003] The design concept of the bearing is to make full use of the internal space of the bearing while meeting the customer's installation dimensions with the same overall dimensions, and to increase or decrease the size and number of steel balls, increase the wall thickness of the rings, etc. to improve the bearing's load capacity, so as to meet the customer's requirements for high loads on the ball structure. Now the question is how to increase the load of the ball bearing when the customer requires the size. Summary of the invention

[0004] In order to solve the above technical problems, the present invention proposes a T-shaped inner ring bearing with enhanced load, which has a clever design, a reasonable and compact structure, increases load, and meets customer usage requirements.

[0005] The technical solution of the present invention: A T-shaped inner ring bearing with enhanced load comprises an outer ring, an inner ring, a retaining frame, a sealing ring and steel balls. Two annular grooves are designed on the inner side of the outer ring, and two annular grooves are designed on the outer side of the inner ring. The inner ring is located on the inner side of the outer ring and a double row of steel balls are installed between the outer ring and the inner ring through the retaining frame. The upper and lower ends of the steel balls are respectively located in the annular groove of the outer ring and the annular groove of the inner ring. A sealing ring is respectively installed on both sides of the gap between the outer ring and the inner ring; annular protrusions are respectively arranged around the two axial ends of the inner ring; the outer ring has an outer diameter of 119.2 mm and an axial thickness of 34 mm; the inner ring has an inner diameter of 55 mm and an axial thickness of 30 mm, the axial height of the annular protrusion is 2.5 mm, and the inner inner diameter of the annular protrusion is 70.2 mm; the radius of the annular grooves of the outer ring and the inner ring is 6 mm.

[0006] An annular groove is respectively formed on the inner side of the outer ring near both ends, the outer periphery of the sealing ring is clamped in the annular groove, and the lower end of the sealing ring is sealingly supported on the outer peripheral surface of the annular protrusion.

[0007] The retaining frame is designed as a plastic retaining frame.

[0008] The two ends of the cross section of the inner ring are in T shape.

[0009] The advantage of the present invention is that the structure is changed from a single-row ball structure to a double-row ball structure, which reduces the diameter of the steel balls and increases the number of steel balls, thereby making full use of the height dimension of the inner ring installation to increase the wall thickness of the ring to improve the bearing capacity of the bearing; the T-shaped inner ring double-row ball structure extends the outer circle of the inner ring outward at both ends to form a boss, which increases the design space of the internal structure of the bearing compared to the inner ring of the traditional double-row ball structure, thereby increasing the diameter of the rolling body, thereby increasing the load of the optimal design and meeting all design advance factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the present invention.

[0011] Figure 2 It is a partial enlarged schematic diagram of the steel ball of the present invention.

[0012] Figure 3 It is a partially enlarged schematic diagram of the inner ring of the present invention.

[0013] Figure 4 This is a partial enlarged schematic diagram of the steel ball of Comparative Example 1.

[0014] Figure 5 This is a partial enlarged schematic diagram of the inner circle of Comparative Example 1.

[0015] Figure 6 This is a partial enlarged schematic diagram of the steel ball in Example 2.

[0016] Figure 7 This is a partial enlarged schematic diagram of the inner circle of Comparative Example 2.

[0017] Figure 8 This is a schematic diagram of the assembly of Example 2 and the mounting shaft.

[0018] Fig. 9 It is a schematic diagram of assembling the present invention and the mounting shaft. DETAILED DESCRIPTION Example

[0019] like Figure 1-3A T-shaped inner ring bearing with enhanced load, comprising an outer ring 1, an inner ring 2, a retainer 3, a sealing ring 4, and steel balls 5. Two annular grooves are designed on the inner side of the outer ring 1, and two annular grooves are designed on the outer side of the inner ring 2. The inner ring 2 is located on the inner side of the outer ring 1, and a double row of steel balls 5 are installed between the outer ring 1 and the inner ring 2 through the retainer 3. The upper and lower ends of the steel balls 5 are respectively located in the annular grooves of the outer ring 1 and the annular grooves of the inner ring 2. A sealing ring 4 is installed on both sides of the gap between the outer ring 1 and the inner ring 2; annular protrusions 6 are respectively arranged around the two axial ends of the inner ring 2; the outer ring 1 has an outer diameter of 119.2 mm, and the axial thickness of the outer ring 1 is 34 mm; the inner diameter of the inner ring 2 is 55 mm, and the axial thickness of the inner ring 2 is 30 mm; the axial height of the annular protrusion 6 is 2.5 mm, and the inner inner diameter of the annular protrusion 6 is 70.2 mm; the radius of the annular grooves of the outer ring 1 and the inner ring 2 is 6 mm. The wall thickness of the outer ring is 13.6mm; the wall thickness of the inner ring is 6.5mm, with double rows and 12 steel balls installed in each row, and the center distance between the upper and lower steel balls is 80mm; a double-row plastic cage is used.

[0020] An annular groove is respectively formed on the inner side of the outer ring 1 near both ends. The outer periphery of the sealing ring 4 is clamped in the annular groove, and the lower end of the sealing ring 4 is sealingly supported on the outer peripheral surface of the annular protrusion 6.

[0021] The inner ring 2 has a T-shaped cross section at both ends.

[0022] Comparative Example 1: like Figure 4-5 , single deep groove ball bearing, if implemented in 1, the outer diameter and axial thickness of the outer ring remain unchanged; the outer ring and inner ring are designed as a single-row annular groove structure; the wall thickness of the outer ring is 10.54mm; the axial thickness of the inner ring is 25mm, the wall thickness of the inner ring is 5.15mm, and the radius of the annular groove is 8.2mm; 9 steel balls are installed in a single row, and the center distance between the upper and lower steel balls is 81.7mm; a single-row iron cage is used.

[0023] Comparative Example 2: like Figure 6-7 In the traditional double-row ball bearing, the outer diameter and axial thickness of the outer ring in implementation 1 remain unchanged; the outer ring and the inner ring are designed as a double-row annular groove structure; the wall thickness of the outer ring is 13.1mm; the axial thickness of the inner ring is 25mm, the wall thickness of the inner ring is 10mm, and the radius of the annular groove is 4.5mm; there are 16 steel balls in each row, and the center distance between the upper and lower steel balls is 84mm; a double-row plastic cage is used.

[0024] The comparison of bearing parameters of the above embodiment 1 and comparative examples 1 and 2 is shown in the following table: Through the comparison of attached pictures and data: 1. Although the optimal design wall thickness of the ordinary inner ring double-row ball structure is increased, the dynamic load is reduced and cannot meet the customer's load requirements; 2. The T-shaped inner ring double-row ball structure forms a boss by extending the outer ends of the inner ring outward. Compared with the inner ring of the traditional double-row ball structure, the design space of the internal structure of the bearing is increased, thereby increasing the diameter of the steel ball and increasing the load of the optimal design to meet all dynamic / static load requirements of customers.

[0025] Schematic diagram of the bearing inner ring installation, such as Figure 8 It is a traditional double-row ball bearing installation structure: Fig. 9 This is the installation structure of the T-shaped inner ring double-row ball bearing of the present invention. Compared with the ordinary inner ring installation of the traditional double-row ball bearing, the inner diameter N of the annular bosses at both ends of the T-shaped inner ring must be larger than the diameter M of the shaft head shoulder of the installation shaft, and must be larger than the maximum center diameter of the shaft retaining ring when installed externally (the standard 55 shaft retaining ring has this size of Φ70.2mm), that is, N=Φ70.2MIN, so the maximum inner diameter of the T-shaped inner ring designed by the present invention is 70.2mm.

Claims

1. A T-shaped inner ring bearing with enhanced load, characterized in that: It includes an outer ring, an inner ring, a retaining frame, a sealing ring, and steel balls. Two annular grooves are designed on the inner side of the outer ring, and two annular grooves are designed on the outer side of the inner ring. The inner ring is located on the inner side of the outer ring, and a double row of steel balls are installed between the outer ring and the inner ring through the retaining frame. The upper and lower ends of the steel balls are respectively located in the annular groove of the outer ring and the annular groove of the inner ring. A sealing ring is installed on both sides of the gap between the outer ring and the inner ring; annular protrusions are respectively arranged around the two axial ends of the inner ring; the outer ring has an outer diameter of 119.2mm, an axial thickness of 34mm, and a wall thickness of 13.6mm; the inner diameter of the inner ring is 55mm, an axial thickness of 30mm, and a wall thickness of 6.5mm; the axial height of the annular protrusion is 2.5mm, and the inner inner diameter of the annular protrusion is 70.2mm; the radius of the annular grooves of the outer ring and the inner ring is 6mm.

2. The load-enhanced T-shaped inner ring bearing according to claim 1, characterized in that: An annular groove is respectively formed on the inner side of the outer ring near both ends, the outer periphery of the sealing ring is clamped in the annular groove, and the lower end of the sealing ring is sealingly supported on the outer peripheral surface of the annular protrusion.

3. The load-enhanced T-shaped inner ring bearing according to claim 1, characterized in that: The retaining frame is designed as a plastic retaining frame.

4. The load-enhanced T-shaped inner ring bearing according to claim 1, characterized in that: The two ends of the cross section of the inner ring are in T shape.

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