A sealing structure for a steering bearing

Abstract

The present invention discloses a sealing structure of a steering bearing, which belongs to the field of steering bearing sealing, and includes: a plastic upper cover; characterized in that it also includes: a rotating member, which is arranged inside the plastic upper cover; a plastic lower cover, which is rotatably connected to the plastic upper cover via the rotating member; an inner stopper, which is arranged at the inner connection between the plastic upper cover and the plastic lower cover to seal the inner side of the plastic upper cover and the plastic lower cover; an outer stopper, which is arranged at the outer connection between the plastic upper cover and the plastic lower cover to seal the outer side of the plastic upper cover and the plastic lower cover. The present invention is provided with an inner stopper and an outer stopper, and performs double-layer or multi-layer sealing on the plastic upper cover and the plastic lower cover; when the plastic upper cover rotates and the plastic lower cover remains stationary, external muddy water and dust are prevented from entering the interior of the bearing, corroding the steel balls, the inner track and the outer track, thereby avoiding poor rotation.

Description

Technical Field

[0001] The invention relates to the field of steering bearing seals, and more particularly to a sealing structure of a steering bearing. Background Art

[0002] Bearings are components that fix and reduce the load friction coefficient during mechanical transmission. In other words, when other parts move relative to each other on the shaft, they are used to reduce the friction coefficient during power transmission and keep the center position of the shaft fixed. Bearings are an important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body and reduce the mechanical load friction coefficient of the equipment during transmission.

[0003] In the steering bearing used for automobile shock absorption, since the automobile shock absorber is exposed to the outside, it will be corroded by external rainwater, affecting the rotation of the bearing, so a sealing mechanism needs to be set; the existing steering bearing sealing structure is prone to poor sealing and has a short service life.

[0004] In view of this, in view of the above-mentioned deficiencies, the present invention improves and optimizes the sealing structure in the prior art and develops a sealing structure for a steering bearing. Summary of the invention

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A sealing structure of a steering bearing, comprising: a plastic upper cover; and also comprising:

[0007] A rotating member, arranged inside the plastic upper cover;

[0008] A plastic lower cover, rotatably connected to the plastic upper cover via a rotating member;

[0009] An inner stopper, arranged at the connection between the inner side of the plastic upper cover and the inner side of the plastic lower cover, so as to seal the inner side of the plastic upper cover and the inner side of the plastic lower cover;

[0010] The outer blocking member is arranged at the outer connection of the plastic upper cover and the plastic lower cover to seal the outer sides of the plastic upper cover and the plastic lower cover.

[0011] Furthermore, the rotating member comprises:

[0012] An upper track, fitted with the plastic upper cover;

[0013] A lower track, fitted with the plastic lower cover;

[0014] A retaining frame, disposed between the upper rail and the lower rail;

[0015] The steel ball is arranged on the retaining frame and rotates in contact with the upper track and the lower track.

[0016] Furthermore, an outer sealing lip is arranged on the inner side of the plastic upper cover, and the outer sealing lip is cooperatively connected with the outer stopper;

[0017] A first mounting groove is provided on the plastic lower cover to accommodate the outer stopper and the inner stopper;

[0018] A right-angle groove is provided on the inner side of the plastic upper cover.

[0019] Furthermore, the outer block comprises:

[0020] A first outer stop seal ring is arranged on the first installation groove, and two stoppers are arranged on the first outer stop seal ring, and the two stoppers are in interference contact with the plastic upper cover on both sides of the outer sealing lip;

[0021] The inner block comprises:

[0022] The first inner seal ring is arranged on the first installation groove, and a blocking piece is arranged on the first inner seal ring, and the blocking piece is in interference contact with the inner side of the plastic upper cover.

[0023] Furthermore, the outer block comprises:

[0024] The second outer stop seal ring is arranged on the first mounting groove, and three stoppers are arranged on the second outer stop seal ring, and two of the stoppers are in interference contact with the plastic upper cover on both sides of the outer sealing lip, and the other stopper is in interference contact with the inner side of the plastic upper cover.

[0025] Furthermore, the inner block comprises:

[0026] The second inner seal ring is arranged on the first mounting groove, and two baffles are arranged on the second inner seal ring, one of the baffles is in interference contact with the inner side of the plastic upper cover, and the other baffle is in interference contact with the right-angle groove on the inner side of the plastic upper cover to achieve multi-layer sealing.

[0027] Furthermore, an outer sealing lip is arranged on the outer side of the plastic lower cover, and the outer sealing lip is cooperatively connected with the outer stopper;

[0028] An inner sealing lip is arranged on the inner side of the plastic lower cover, and the inner sealing lip is cooperatively connected with the inner stopper;

[0029] A second mounting groove is provided on the plastic upper cover to accommodate the outer stopper;

[0030] A right-angle groove is formed on the inner side of the plastic upper cover to accommodate the inner stopper.

[0031] Furthermore, the outer block comprises:

[0032] A third outer stop seal ring is arranged on the second mounting groove, and two stoppers are arranged on the third outer stop seal ring, and the two stoppers are in interference contact with the plastic lower cover on both sides of the outer sealing lip;

[0033] The inner block comprises:

[0034] The third inner stop seal ring is arranged on the right-angle groove, and two stoppers are arranged on the third inner stop seal ring, and the two stoppers are in interference contact with the plastic lower cover on both sides of the inner sealing lip.

[0035] Furthermore, the outer block comprises:

[0036] A fourth outer stop seal ring is arranged on the second mounting groove, and two stoppers are arranged on the fourth outer stop seal ring, and one of the stoppers is in interference contact with the plastic lower cover on the inner side of the outer sealing lip, and the other stopper is in close contact with the outer end of the plastic lower cover;

[0037] The inner block comprises:

[0038] The fourth inner stop seal ring is arranged on the right-angle groove, and two stoppers are arranged on the fourth inner stop seal ring, and the two stoppers are in interference contact with the plastic lower cover on both sides of the inner sealing lip.

[0039] Compared with the prior art, the beneficial effects of the present invention are: an inner block and an outer block are provided to perform double-layer or multi-layer sealing on the plastic upper cover and the plastic lower cover; when the plastic upper cover rotates and the plastic lower cover remains stationary, external mud, water and dust are prevented from entering the interior of the bearing and corroding the steel balls, the inner track and the outer track, thereby avoiding poor rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A perspective view of the present invention;

[0042] Figure 2 It is a cross-sectional perspective view of the present invention;

[0043] Figure 3 An exploded perspective view of the present invention;

[0044] Figure 4 is a first cross-sectional view of the present invention;

[0045] Figure 5 for Figure 4 A partial enlarged view of the

[0046] Figure 6 is a second cross-sectional view of the present invention;

[0047] Figure 7 for Figure 6 A in the enlarged view;

[0048] Figure 8 is a third cross-sectional view of the present invention;

[0049] Fig. 9 for Figure 8 The enlarged view of point B in the figure;

[0050] Fig.10 is a fourth cross-sectional view of the present invention;

[0051] Fig.11 for Fig.10 Enlarged view of point C in the figure.

[0052] Description of the numbers in the figure:

[0053] 1. Plastic upper cover; 2. Upper track; 3. Retaining frame; 4. Steel ball; 5. Lower track; 6. Inner stopper; 61. First inner seal ring; 62. Second inner seal ring; 63. Third inner seal ring; 64. Fourth inner seal ring; 7. Plastic lower cover; 8. Outer stopper; 81. First outer seal ring; 82. Second outer seal ring; 83. Third outer seal ring; 84. Fourth outer seal ring; 9. Inner sealing lip; 10. Outer sealing lip; 11. First mounting groove; 12. Second mounting groove; 13. Right-angle groove. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0055] Example 1

[0056] like Figures 1 to 11As shown, a sealing structure of a steering bearing comprises: a plastic upper cover 1; and further comprises: a rotating member arranged inside the plastic upper cover 1; a plastic lower cover 7 rotatably connected to the plastic upper cover 1 via the rotating member; an inner stopper 6 arranged at the inner connection between the plastic upper cover 1 and the plastic lower cover 7 to seal the inner sides of the plastic upper cover 1 and the plastic lower cover 7; and an outer stopper 8 arranged at the outer connection between the plastic upper cover 1 and the plastic lower cover 7 to seal the outer sides of the plastic upper cover 1 and the plastic lower cover 7.

[0057] like Figures 1 to 3 As shown, the rotating part includes: an upper track 2, which is in contact with the plastic upper cover 1; a lower track 5, which is in contact with the plastic lower cover 7; a retaining frame 3, which is arranged between the upper track 2 and the lower track 5; and a steel ball 4, which is arranged on the retaining frame 3 and rotates in contact with the upper track 2 and the lower track 5.

[0058] In this embodiment, an inner stopper 6 and an outer stopper 8 are provided to seal the plastic upper cover 1 and the plastic lower cover 7; when the plastic upper cover 1 rotates and the plastic lower cover 7 remains stationary, external muddy water and dust are prevented from entering the bearing and corroding the steel ball 4, the inner track and the outer track, thereby avoiding poor rotation. Since the plastic cover at one end of the traditional sealing ring rotates while the other end remains stationary when the traditional sealing ring is used, sliding friction will occur between the sealing ring and the plastic cover, and long-term use will cause fatigue of the sealing ring material, resulting in poor sealing effect.

[0059] Among them, the baffles on all the sealing rings are set to rubber material, which has a certain elasticity and will produce a certain elastic deformation when in interference contact with the plastic cover; therefore, after using it for a period of time, even if there is friction loss, it will fit tightly with the plastic cover under the action of elastic force, without affecting the sealing effect, thereby improving the product use effect.

[0060] like Figures 4 to 7 As shown, the outer sealing lip 10 is arranged on the inner side of the plastic upper cover 1, and the outer sealing lip 10 is cooperatively connected with the outer stopper 8; the first mounting groove 11 is opened on the plastic lower cover 7 to place the outer stopper 8 and the inner stopper 6; the right-angle groove 13 is opened on the inner side of the plastic upper cover 1.

[0061] like Figures 4 to 5 As shown, the outer stopper 8 includes: a first outer stopper sealing ring 81, which is arranged on the first mounting groove 11, and two stopper plates are arranged on the first outer stopper sealing ring 81, and the two stopper plates are in interference contact with the plastic upper cover 1 on both sides of the outer sealing lip 10; the inner stopper 6 includes: a first inner stopper sealing ring 61, which is arranged on the first mounting groove 11, and a stopper plate is arranged on the first inner stopper sealing ring 61, and the stopper plates are in interference contact with the inner side of the plastic upper cover 1.

[0062] In a preferred embodiment of the present invention, an annular outer sealing lip 10 is arranged on the inner side of the plastic upper cover 1 near the outer end of the plastic lower cover 7; the position of the first outer stop sealing ring 81 is determined by installing the first outer stop sealing ring on the first installation groove 11 on the plastic lower cover 7; the first outer stop sealing ring is provided with two baffles, and the two baffles are in interference fit with the plastic upper cover 1 on both sides of the outer sealing lip 10; when a small amount of rain and mud passes through the first baffle, the impact force of the mud and sand will be first blocked by the outer sealing lip 10, and then when it moves to the contact point between the second baffle and the plastic upper cover 1, it is difficult to pass through the second baffle; thereby achieving double-layer sealing; because the inner side is less impacted by mud and rain than the outer side, the first inner stop sealing ring arranged on the inner side is only provided with one baffle to achieve the sealing effect, so as to reduce the production cost.

[0063] Example 2

[0064] like Figures 6 to 7 As shown, the outer blocking member 8 includes: a second outer blocking sealing ring 82, which is arranged on the first mounting groove 11, and three blocking pieces are arranged on the second outer blocking sealing ring 82, and two of the blocking pieces are in interference contact with the plastic upper cover 1 on both sides of the outer sealing lip 10, and the other blocking piece is in interference contact with the inner side of the plastic upper cover 1.

[0065] like Figures 6 to 7 As shown, the inner stopper 6 includes: a second inner stopper sealing ring 62, which is arranged on the first mounting groove 11, and two stoppers are arranged on the second inner stopper sealing ring 62, one of the stoppers is in interference contact with the inner side of the plastic upper cover 1, and the other stopper is in interference contact with the right-angle groove 13 on the inner side of the plastic upper cover 1, so as to realize multi-layer sealing.

[0066] In a preferred embodiment of the present invention, in an environment with a lot of rain and mud, the device is provided with a second outer blocking sealing ring, and the second outer blocking sealing ring is provided with three blocking pieces that interfere with the plastic upper cover 1; when a small amount of rain and mud passes through the first blocking piece, the impact force of the mud and sand will be first blocked by the outer sealing lip 10, and then when it moves to the contact point between the second blocking piece and the plastic upper cover 1, it is difficult to pass through the second blocking piece; even if a trace amount of mud and sand passes through the second blocking piece, it will be difficult to pass through the third blocking piece, thereby achieving three-layer sealing and further improving the sealing effect; due to the large amount of mud and sand, the second inner blocking sealing ring is provided with two blocking pieces, one of which is designed to be longer in length, and when it contacts the right-angle groove 13 of the plastic upper cover 1, one end of the longer blocking piece is in interference contact with the top of the right-angle groove 13, and the end produced by the folding is in interference contact with the side of the right-angle groove 13, thereby achieving a double-layer sealing caused by one blocking piece, and cooperating with another blocking piece on the second inner blocking sealing ring to achieve a three-layer sealing.

[0067] Example 3

[0068] like Figures 8 to 11 As shown, the outer sealing lip 10 is arranged on the outer side of the plastic lower cover 7, and the outer sealing lip 10 is matched and connected with the outer block part 8; the inner sealing lip 9 is arranged on the inner side of the plastic lower cover 7, and the inner sealing lip 9 is matched and connected with the inner block part 6; the second mounting groove 12 is opened on the plastic upper cover 1 to place the outer block part 8; the right-angle groove 13 is opened on the inner side of the plastic upper cover 1 to place the inner block part 6.

[0069] like Figures 8 to 11 As shown, the outer stopper 8 includes: a third outer stopper sealing ring 83, which is arranged on the second mounting groove 12, and two stoppers are arranged on the third outer stopper sealing ring 83, and the two stoppers are in interference contact with the plastic lower cover 7 on both sides of the outer sealing lip 10; the inner stopper 6 includes: a third inner stopper sealing ring 63, which is arranged on the right-angle groove 13, and two stoppers are arranged on the third inner stopper sealing ring 63, and the two stoppers are in interference contact with the plastic lower cover 7 on both sides of the inner sealing lip 9.

[0070] In a preferred embodiment of the present invention, different from the above two embodiments, the structures of the plastic upper cover 1 and the plastic lower cover 7 in this embodiment are changed; the third outer stop seal ring is placed on the second mounting groove 12, and the outer sealing lip 10 is arranged on the outside of the plastic lower cover 7; the third outer stop seal ring is provided with two baffles that interfere with the plastic lower cover 7 on both sides of the outer sealing lip 10, and when a small amount of rainwater mud and sediment passes through the first baffle, the impact force of the mud and sand will be blocked by the outer sealing lip 10 first, and then when it moves to the contact point between the second baffle and the plastic lower cover 7, it is difficult to pass through the second baffle; thereby achieving double-layer sealing;

[0071] The third inner stop sealing ring is placed on the right-angle groove 13, and the inner sealing lip 9 is arranged on the inner side of the plastic lower cover 7; the third inner stop sealing ring is provided with two baffles which are in interference fit with the plastic lower cover 7 on both sides of the inner sealing lip 9. When a small amount of rainwater mud and sediment passes through the first baffle, the impact force of the mud and sand will be blocked by the inner sealing lip 9 first, and then when it moves to the contact point between the second baffle and the plastic lower cover 7, it is difficult to pass through the second baffle; thereby achieving double-layer sealing.

[0072] Example 4

[0073] like Figures 8 to 11As shown, the outer stopper 8 includes: a fourth outer stopper sealing ring 84, which is arranged on the second mounting groove 12, and two stoppers are arranged on the fourth outer stopper sealing ring 84, and one of the stoppers is in interference contact with the plastic lower cover 7 on the inner side of the outer sealing lip 10, and the other stopper is fitly connected with the outer end of the plastic lower cover 7; the inner stopper 6 includes: a fourth inner stopper sealing ring 64, which is arranged on the right-angle groove 13, and two stoppers are arranged on the fourth inner stopper sealing ring 64, and the two stoppers are in interference contact with the plastic lower cover 7 on both sides of the inner sealing lip 9.

[0074] In a preferred embodiment of the present invention, a fourth outer stop seal ring is placed on the second mounting groove 12; the fourth outer stop seal ring is provided with two baffles, an inner baffle is in interference with the outer sealing lip 10 facing the inner side of the plastic lower cover 7, and the other baffle is set to be longer, and the longer end is exposed to the outside through the plastic lower cover 7. Through the elastic design of the baffle, one side of the baffle is fitted with the outer end of the plastic lower cover 7 to achieve a sealing effect. At the same time, through this design, it is easy to clean the bearing, and there is no need to install or disassemble the bearing. The mud and sand that pass through the first layer of the seal ring can be cleaned by lifting the longer baffle, which is very convenient.

[0075] The fourth inner stop sealing ring is placed on the right-angle groove 13, and the inner sealing lip 9 is arranged on the inner side of the plastic lower cover 7; the fourth inner stop sealing ring is provided with two baffles which are in interference fit with the plastic lower cover 7 on both sides of the inner sealing lip 9. When a small amount of rainwater mud and sediment passes through the first baffle, the impact force of the mud and sand will be blocked by the inner sealing lip 9 first, and then when it moves to the contact point between the second baffle and the plastic lower cover 7, it is difficult to pass through the second baffle; thereby achieving double-layer sealing.

[0076] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sealing structure of a steering bearing, comprising: The plastic upper cover (1) is characterized by further comprising: A rotating part, arranged inside the plastic upper cover (1); A plastic lower cover (7) rotatably connected to the plastic upper cover (1) via a rotating member; An inner stopper (6) is arranged at the inner connection between the plastic upper cover (1) and the plastic lower cover (7) to seal the inner sides of the plastic upper cover (1) and the plastic lower cover (7); An outer stopper (8) is arranged at the outer connection between the plastic upper cover (1) and the plastic lower cover (7) to seal the outer sides of the plastic upper cover (1) and the plastic lower cover (7); The rotating member comprises: The upper track (2) is fitted with the plastic upper cover (1); The lower track (5) is fitted with the plastic lower cover (7); A retaining frame (3) is arranged between the upper rail (2) and the lower rail (5); A steel ball (4) is arranged on the retaining frame (3) and rotates in contact with the upper track (2) and the lower track (5); An outer sealing lip (10) is arranged on the inner side of the plastic upper cover (1), the outer sealing lip (10) is an annular protrusion on the radial inner side of the plastic upper cover (1), and the outer sealing lip (10) is cooperatively connected with the outer stopper (8); A first mounting groove (11) is formed on the plastic lower cover (7) to accommodate the outer stopper (8) and the inner stopper (6); A right-angle groove (13) is formed on the inner side of the plastic upper cover (1); The outer block (8) comprises: A second outer stop seal ring (82) is arranged on the first mounting groove (11), and three stoppers are arranged on the second outer stop seal ring (82), wherein two stoppers on the second outer stop seal ring (82) are respectively located on two axial sides of the outer sealing lip (10), and wherein two stoppers on the second outer stop seal ring (82) are in interference contact with the plastic upper cover (1) on two axial sides of the outer sealing lip (10), and another stopper on the second outer stop seal ring (82) is in interference contact with the inner side of the plastic upper cover (1); The inner block (6) comprises: The second inner stop seal ring (62) is arranged on the first mounting groove (11), and the second inner stop seal ring (62) is provided with two stoppers, one stopper on the second inner stop seal ring (62) is in interference contact with the inner side of the plastic upper cover (1), and the other stopper on the second inner stop seal ring (62) is in interference contact with the right-angle groove (13) on the inner side of the plastic upper cover (1), so as to achieve multi-layer sealing.

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