High temperature resistant bearing for injection molding machine

Abstract

This utility model relates to a high-temperature resistant bearing for injection molding machines that not only has better overall high-temperature resistance but also better sealing performance. The outer ring has multiple grooves on its inner surface, and the inner ring has multiple grooves on its outer surface. A ball retainer is positioned between the inner and outer rings and has multiple through holes for the balls. The inner surface of the outer ring has two annular grooves, with the multiple grooves located between them. The contact seal ring body has an annular skeleton inside, and its outer surface has an annular protrusion. The inner surface of the contact seal ring body is flat, and the contact seal ring body and the annular protrusion are integrally formed. Two contact seal rings are installed between the inner and outer rings, with the annular protrusions in the contact seal rings engaging in corresponding annular grooves. Advantages: This high-temperature resistant bearing for injection molding machines not only has better overall high-temperature resistance but also better sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of deep groove ball bearing manufacturing technology, specifically relating to a high-temperature resistant special bearing for injection molding machines. Background Technology

[0002] CN 202165419 U, entitled "A Deep Groove Ball Bearing with a Pinned Half-Cage", includes an inner ring, an outer ring, a dust cover, and several steel balls. The axial length of the inner ring is longer than that of the outer ring. Grooves are provided on the inner surface of the outer ring and the outer surface of the inner ring. The steel balls are fitted into the grooves between the inner and outer rings. Two half-cages are mounted on both sides of each steel ball. A rivet is provided on the half-cage mounted on the left side of the steel ball, and it is riveted to the right half-cage by means of a rivet hole. Slots are provided on both sides of the grooves on the outer ring. A dust cover is provided over the half-cages, and the dust cover is fitted into a slot on the inner surface of the outer ring. A spring ring is installed between the dust cover and the slot. Its shortcomings are: this type of deep groove ball bearing with a studded semi-cage uses ordinary dust covers to cover the steel balls, which are used for dust prevention. However, ordinary dust covers have relatively poor high-temperature resistance and are not effective in injection molding machines. In addition, the dust covers mainly serve the purpose of dust prevention, and their sealing performance is relatively poor. Utility Model Content

[0003] Design objective: To design a high-temperature resistant bearing specifically for injection molding machines that not only has better overall high-temperature resistance but also better sealing performance.

[0004] Design scheme: To achieve the above design objectives.

[0005] 1. The outer ring has two annular grooves on its inner surface and multiple recesses located between the two annular grooves. The contact sealing ring body has an annular skeleton inside. The outer surface of the contact sealing ring body has an annular protrusion, and the inner surface of the contact sealing ring body is flat. The contact sealing ring body and the annular protrusion are integrally formed and are made of nitrile rubber. Two contact sealing rings are installed between the inner and outer rings and are located on both sides of multiple steel balls. The design of the annular protrusions in the contact sealing rings being engaged in the corresponding annular grooves is one of the technical features of this utility model. The purpose of this design is as follows: the inner surface of the outer ring has two annular grooves and multiple recesses located between the two annular grooves; the contact sealing ring body has an annular skeleton inside; the outer surface of the contact sealing ring body has an annular protrusion, and the inner surface of the contact sealing ring body is flat; the contact sealing ring body and the annular protrusion are integrally formed and are made of nitrile rubber; two contact sealing rings are installed between the inner and outer rings, and the two contact sealing rings are located on both sides of multiple steel balls; the annular protrusions in the contact sealing rings are engaged in the corresponding annular grooves. The internal structure consists of two parts: First, the contact seal ring is made of nitrile rubber and a metal ring skeleton. This type of contact seal ring not only has good high-temperature resistance but also good sealing performance and structural strength. The good high-temperature resistance of the contact seal ring improves the overall high-temperature resistance of the special high-temperature bearing for injection molding machines. Second, the use of annular protrusions made of nitrile rubber to engage with annular grooves, along with the compression fit between the nitrile rubber surface of the inner ring and the outer ring surface, ensures the sealing effect of the contact seal ring after assembly in the special high-temperature bearing for injection molding machines.

[0006] 2. The design of the steel ball retainer consisting of two half-retainers riveted together by multiple rivets is the second technical feature of this utility model. The purpose of this design is that the steel ball retainer, consisting of two half-retainers riveted together by multiple rivets, facilitates the assembly of the steel balls.

[0007] 3. The design of having an annular extension on the inner side of the inner circular surface of the contact sealing ring body, with the outer side of the annular extension flush with the inner circular surface of the contact sealing ring body, is the third technical feature of this utility model. The purpose of this design is that the annular extension on the inner side of the inner circular surface of the contact sealing ring body, with its outer side flush with the inner circular surface, increases the area of ​​contact between the nitrile rubber surface of the inner circular surface and the outer circular surface of the inner ring, thereby improving the contact sealing effect at that location.

[0008] 4. The annular frame is made of metal and comprises horizontal, vertical, and inclined plate segments. One end of each vertical plate segment has a horizontal plate segment, and the other end has an inclined plate segment. The annular protrusion is located outside the horizontal plate segment, and the annular extension is located outside the inclined plate segment. This design is the fourth technical feature of this utility model. The purpose of this design is that the annular frame is made of metal, and the annular frame comprises horizontal, vertical, and inclined plate segments. One end of each vertical plate segment has a horizontal plate segment, and the other end has an inclined plate segment. The annular protrusion is located outside the horizontal plate segment, and the annular extension is located outside the inclined plate segment. This improves the overall strength of the contact sealing ring while maintaining its sealing effect.

[0009] Technical Solution: A high-temperature resistant bearing for injection molding machines includes an inner ring, an outer ring, a ball cage, two contact seals, and multiple steel balls. The outer ring has multiple grooves (first groove) on its inner surface, and the inner ring has multiple grooves (second groove) on its outer surface. The ball cage is positioned between the inner and outer rings and has multiple through holes for the steel balls. Each through hole contains a steel ball, with one end of the ball located in the corresponding groove (first groove) and the other end in the corresponding groove (second groove). These multiple steel balls are thus secured between the inner and outer rings. The inner surface of the outer ring has two annular retaining rings. The contact sealing ring has multiple grooves located between two annular slots. The contact sealing ring body has an annular skeleton inside. The outer circular surface of the contact sealing ring body has an annular protrusion, and the inner circular surface of the contact sealing ring body is flat. The contact sealing ring body and the annular protrusion are integral structures and are made of nitrile rubber. Two contact sealing rings are installed between the inner ring and the outer ring, and the two contact sealing rings are located on both sides of multiple steel balls. The annular protrusions in the contact sealing rings are engaged in the corresponding annular slots.

[0010] Compared with the prior art, the present invention provides a high-temperature resistant special bearing for injection molding machines that not only has better overall high-temperature resistance but also better sealing performance. Attached Figure Description

[0011] Figure 1 This is a cross-sectional structural diagram of a high-temperature resistant special bearing for injection molding machines. Detailed Implementation

[0012] Example 1: Refer to Appendix Figure 1A high-temperature resistant bearing for injection molding machines includes an inner ring 02, an outer ring 01, a ball cage 07, two contact seals 68, and multiple steel balls 04. The inner surface of the outer ring 01 has multiple grooves 11, and the outer surface of the inner ring 02 has multiple grooves 21. The ball cage 07 is disposed between the inner ring 02 and the outer ring 01 and has multiple through holes for steel balls. Each through hole contains a steel ball 04, with one end of the steel ball 04 located in the corresponding groove 11 and the other end in the corresponding groove 21. These multiple steel balls 04 are thus secured between the inner ring 02 and the outer ring 01. The inner surface of the outer ring 01 has two annular grooves 12 and multiple grooves. One 11 is located between two annular grooves 12. The contact sealing ring 68 has an annular skeleton 682 inside the contact sealing ring body 681. The outer circular surface of the contact sealing ring body 681 has an annular protrusion 683 and the inner circular surface of the contact sealing ring body 681 is flat. The contact sealing ring body 681 and the annular protrusion 683 are integral structures and are made of nitrile rubber. Two contact sealing rings 68 are installed between the inner ring 02 and the outer ring 01 and the two contact sealing rings 68 are located on both sides of multiple steel balls 04. The annular protrusion 683 in the contact sealing ring 68 is engaged in the corresponding annular groove 12.

[0013] The axial length of the inner ring 02 is greater than the axial length of the outer ring 01. The steel ball retainer 07 is composed of two half retainers riveted together by multiple rivets 09, which is prior art and will not be described further here. The inner side of the inner circular surface of the contact sealing ring body 681 is provided with an annular extension 684, and the outer side of the annular extension 684 is flush with the inner circular surface of the contact sealing ring body 681. The annular skeleton 682 is made of metal and includes a horizontal plate segment 6821, a vertical plate segment 6822, and an inclined plate segment 6823. One end of the vertical plate segment 6822 is provided with the horizontal plate segment 6821, and the other end of the vertical plate segment 6822 is provided with the inclined plate segment 6823. The annular protrusion 683 is located outside the horizontal plate segment 6821, and the annular extension 684 is located outside the inclined plate segment 6823. The outer ring 01 has an annular protrusion 13 on its outer circular surface. The annular protrusion 13 facilitates the installation of a high-temperature resistant special bearing for injection molding machines on the injection molding machine.

[0014] The rated load of a high-temperature resistant special bearing for injection molding machines is: Cr=6.0KN, Cor=3.26KN; the lubricating grease in the high-temperature resistant special bearing for injection molding machines is Chevron SRI-2, and the amount of grease injected is 0.45g-0.55g.

[0015] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of this utility model, these textual descriptions are merely simple textual descriptions of the design concept of this utility model, and not limitations on the design concept of this utility model. Any combination, addition, or modification that does not exceed the design concept of this utility model shall fall within the protection scope of this utility model.

Claims

1. A high-temperature-resistant special bearing for injection molding machines, comprising an inner ring (02), an outer ring (01), a ball cage (07), two contact type sealing rings (68) and a plurality of steel balls (04), a plurality of grooves one (11) are arranged on the inner circular surface of the outer ring (01), a plurality of grooves two (21) are arranged on the outer circular surface of the inner ring (02), the ball cage (07) is arranged between the inner ring (02) and the outer ring (01), and a plurality of steel ball through holes are arranged on the ball cage (07), one steel ball (04) is arranged in each steel ball through hole, one end of the steel ball (04) is located in the corresponding groove one (11), and the other end of the steel ball (04) is located in the corresponding groove two (21), and a plurality of steel balls (04) are clamped between the inner ring (02) and the outer ring (01), characterized in that: The outer ring (01) has two annular grooves (12) on its inner circular surface and multiple grooves (11) located between the two annular grooves (12). The contact sealing ring (68) has an annular skeleton (682) inside its contact sealing ring body (681). The outer circular surface of the contact sealing ring body (681) has an annular protrusion (683), and the inner circular surface of the contact sealing ring body (681) is flat. The contact sealing ring body (681) and the annular protrusion (683) are integral structures and are made of nitrile rubber. Two contact sealing rings (681) are installed between the inner ring (02) and the outer ring (01). The two contact sealing rings (68) are located on both sides of the multiple steel balls (04), and the annular protrusion (683) in the contact sealing ring (68) is engaged in the corresponding annular groove (12); the annular skeleton (682) is made of metal, and the annular skeleton (682) is composed of a horizontal plate segment (6821), a vertical plate segment (6822) and an inclined plate segment (6823). One end of the vertical plate segment (6822) is provided with a horizontal plate segment (6821) and the other end of the vertical plate segment (6822) is provided with an inclined plate segment (6823). The annular protrusion (683) is located outside the horizontal plate segment (6821), and the annular extension (684) is located outside the inclined plate segment (6823).

2. The high temperature resistant bearing for injection molding machine according to claim 1, characterized in that: The axial length of the inner ring (02) is greater than the axial length of the outer ring (01).

3. The high temperature resistant bearing for injection molding machine according to claim 1, characterized in that: The steel ball retainer (07) consists of two half retainers riveted together by a plurality of rivets (09).

4. The high temperature resistant bearing for injection molding machine according to claim 1, characterized in that: The inner side of the inner circular surface of the contact sealing ring body (681) is provided with an annular extension (684), and the outer side of the annular extension (684) is flush with the inner circular surface of the contact sealing ring body (681).

5. The high temperature resistant bearing for injection molding machine according to claim 1, characterized in that: The outer ring (01) has an annular protrusion (13) on its outer circular surface.

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