Plastic bearing for steering column

Abstract

The plastic bearing for the steering column comprises an inner ring, an outer ring, a middle ring, a roller arranged between the middle ring and the inner ring and a retainer used for limiting the roller, a plurality of protruding blocks are arranged on the inner circumferential wall of the inner ring, a notch is formed between every two adjacent protruding blocks, an annular groove is formed in the inner ring, and the outer ring is arranged in the annular groove. The plastic bearing inner ring comprises an inner ring body, a ring groove is formed in the inner ring body, a positioning piece coaxial with the inner ring body is arranged in the ring groove, the positioning piece and the ring groove are detachably connected and are in interference fit after connection, the positioning piece can make contact with the peripheral wall of a tubular column placed in the inner ring body, and the plastic bearing inner ring is provided with the detachable positioning piece, simple in disassembly and assembly mode, convenient to replace and good in stability.

Description

Technical Field

[0001] The utility model relates to the field of plastic bearings, in particular to a plastic bearing for a steering column. Background Art

[0002] The steering column is a key component in the automobile steering system. It is responsible for transmitting the driver's steering operation to the wheels, thereby realizing the steering of the vehicle. The bearing is an important component of the steering column, and its performance directly affects the stability and reliability of the steering system.

[0003] In the design of traditional bearings for steering columns, bearings are usually made of metal, such as deep groove ball bearings. However, metal bearings have some limitations in certain application scenarios, such as heavy weight, the need for regular lubrication and maintenance, and possible instability in certain special environments. Currently, a plastic bearing for steering columns has appeared on the market. This bearing is made of plastic and has the characteristics of light weight, low cost, and corrosion resistance. However, the inner ring of this plastic bearing is prone to displacement after positioning the steering column, the positioning piece structure in the inner ring has poor stability, the steering column is prone to rotation in the inner ring, and this positioning structure cannot be disassembled and assembled with the inner ring, and is difficult to replace after wear. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a plastic bearing for a steering column. The inner ring of the plastic bearing has a detachable positioning piece, which is simple to disassemble and assemble, easy to replace, and has good stability.

[0005] To achieve the above-mentioned purpose, the utility model provides a plastic bearing for a steering column, comprising an inner ring, an outer ring, a middle ring, a roller arranged between the middle ring and the inner ring, and a retaining frame for limiting the roller, the inner peripheral wall of the inner ring is provided with a plurality of protrusions, a notch is formed between two adjacent protrusions, an annular groove is provided on the inner ring, a positioning piece coaxial with the inner ring is provided in the annular groove, the positioning piece is detachably connected to the annular groove and has an interference fit after connection, and the positioning piece can contact the outer peripheral wall of the column placed in the inner ring.

[0006] The effect that can be produced by adopting the above technical scheme is: an annular groove is set on the inner ring, a locating piece coaxial with the inner ring is set in the annular groove, the locating piece is embedded in the annular groove, and the connection mode of interference fit between the annular groove and the locating piece is adopted so that the locating piece is not easy to fall out of the annular groove, and the locating piece can be used to locate the pipe column connected to the inner ring, and when installing the inner ring, the locating piece is aligned with the annular groove position on the inner ring, one end of the locating piece is first inserted into the annular groove, and then the locating piece is pressed until the locating piece is completely embedded in the annular groove, and the locating piece is pressed tightly. Since the bearing is a plastic bearing with elasticity, the interference fit connection between the locating piece and the annular groove is more stable. If the locating piece is damaged, the technicians in this field only need to remove the locating piece from the annular groove, replace it with a new one, and embed it into the annular groove in the same installation mode. The disassembly and assembly mode is simple, and the replacement of the locating piece is convenient. The locating piece after installation has good stability and can position the pipe column.

[0007] The utility model is further configured as follows: the positioning member includes a positioning ring for plugging and fitting with the annular groove, the positioning ring and the annular groove have an interference fit, the positioning ring is provided with a toothed edge toward each notch, the inner wall of the notch is provided with a toothed edge groove, the toothed edge is plugged and fitted with the toothed edge groove, and the toothed edge groove is connected with the annular groove.

[0008] The effect that can be produced by adopting the above technical scheme is: a positioning ring is provided on the positioning piece, and a toothed edge is provided on the positioning ring. The positioning ring is used to be inserted in the ring groove, and a toothed edge groove is provided at the position of the ring groove corresponding to the toothed edge. The toothed edge groove is placed on the inner wall of the notch. When installing the positioning piece, first insert the toothed edge corresponding to the toothed edge groove until the toothed edge is inserted to the end of the toothed edge groove, and then insert the positioning ring in the ring groove. The toothed edge of the positioning piece after installation with the inner ring is placed in the toothed edge groove, and the positioning ring is placed in the ring groove. The installation method is simple, and the toothed edge groove is connected with the ring groove, which makes the installation more convenient. When the positioning piece needs to be removed, the technicians in this field only need to remove the positioning ring and pull the positioning ring out of the ring groove, so that the toothed edge can also be removed from the toothed edge groove to complete the removal of the positioning piece. The structure is simple and the disassembly and assembly are convenient.

[0009] The utility model is further arranged that: the adjacent tooth edges are arranged to be inclined in opposite directions.

[0010] The effect that can be produced by adopting the above-mentioned technical scheme is: by setting the two adjacent tooth edges in opposite directions, when the pipe is in contact with the inner ring, the outer peripheral wall of the pipe column is in an arc shape, which makes it easy for the pipe column to rotate circumferentially. The tooth edges are used to position the pipe column circumferentially. After the tooth edges in different directions come into contact with the outer peripheral wall of the pipe column, no matter which side of the tooth edges the pipe column rotates to, it will be affected by the resistance of the tooth edges set in the opposite direction to the rotation direction. The pipe column is not easy to rotate under the resistance of the tooth edges, and has higher stability.

[0011] The utility model is further configured as follows: the tooth edge groove is configured in a convex shape, one end of the tooth edge connected to the tooth edge groove is provided with a convex tooth edge seat matched with the tooth edge groove, and the tooth edge seat is limitedly matched with the tooth edge groove.

[0012] The effect that can be produced by adopting the above technical solution is: a convex-shaped tooth edge groove is adopted, a convex-shaped tooth edge seat is provided at one end of the tooth edge corresponding to the tooth edge groove, and the convex-shaped tooth edge seat is adopted to abut against the side wall corresponding to the tooth edge groove, so that the tooth edge is not easy to fall out of the tooth edge groove, thereby improving the connection stability.

[0013] The utility model is further configured that: a rubber edge is arranged on one side of the tooth edge facing the pipe column along its length direction, and the rubber edge is in contact with the outer peripheral wall of the pipe column.

[0014] The effect that can be produced by adopting the above technical solution is: a rubber edge is set on the side of the tooth edge facing the pipe column, the rubber edge can contact the pipe column, and it is not easy to cause wear on the surface of the pipe column when the pipe column contacts the bearing. The friction between the rubber and the pipe column will be greater, and the pipe column is not easy to rotate after being fixed, and the stability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial structural exploded view of an embodiment of the utility model;

[0016] Figure 2 A three-dimensional diagram of an embodiment of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the inner ring in the embodiment of the utility model. DETAILED DESCRIPTION

[0018] An embodiment of a plastic bearing for a steering column of the utility model is shown in the figure. To achieve the above-mentioned purpose, the utility model provides a plastic bearing for a steering column, comprising an inner ring 1, an outer ring 2, a middle ring 3, a roller arranged between the middle ring 3 and the inner ring 1, and a retaining frame for limiting the roller. The inner peripheral wall of the inner ring 1 is provided with a plurality of protrusions 4, and a notch 5 is formed between two adjacent protrusions 4. The inner ring 1 is provided with an annular groove 6, and a positioning piece 7 coaxial with the inner ring 1 is provided in the annular groove 6. The positioning piece 7 is detachably connected to the annular groove 6 and has an interference fit after connection. The positioning piece 7 can be placed on the outer peripheral wall of the column placed in the inner ring 1. The inner ring 1 is provided with an annular groove 6, and a positioning piece 7 coaxial with the inner ring 1 is provided in the annular groove 6. The positioning piece 7 is embedded in the annular groove 6. The annular groove 6 and the positioning piece 7 are connected by interference fit so that the positioning piece 7 is not easy to fall out of the annular groove 6. The positioning piece 7 can be used to position the pipe column connected to the inner ring 1. When installing the inner ring 1, align the positioning piece 7 with the annular groove 6 on the inner ring 1, first insert one end of the positioning piece 7 into the annular groove 6, and then press the positioning piece 7 until the positioning piece 7 is completely embedded in the annular groove 6, and then press the positioning piece 7. Since the bearing is a plastic bearing with elasticity, the interference fit connection between the positioning piece 7 and the annular groove 6 is more stable. If the positioning piece 7 is damaged, If the notch 5 is damaged, the technicians in this field only need to take out the positioning member 7 from the annular groove 6, replace it with a new positioning member 7, and embed it into the annular groove 6 in the same installation method; the positioning member 7 includes a positioning ring 71 for plugging and matching with the annular groove 6, the positioning ring 71 is interference fit with the annular groove 6, the positioning ring 71 is provided with a toothed edge 72 facing each notch 5, the inner wall of the notch 5 is provided with a toothed edge groove 61, the toothed edge 72 is plugged and matched with the toothed edge groove 61, the toothed edge groove 61 is communicated with the annular groove 6, the positioning member 7 is provided with a positioning ring 71, the positioning ring 71 is provided with a toothed edge 72, the positioning ring 71 is used for plugging and setting in the annular groove 6, the annular groove 6 is provided with a tooth edge groove 61 at the position corresponding to the tooth edge 72, and the tooth edge groove 61 is placed on the inner wall of the notch 5. When installing the positioning member 7, the tooth edge 72 is first inserted into the tooth edge groove 61 corresponding to the tooth edge groove 61 until the tooth edge 72 is inserted to the end of the tooth edge groove 61, and then the positioning ring 71 is inserted into the ring groove 6, and the tooth edge 72 of the positioning member 7 installed with the inner ring 1 is placed in the tooth edge groove 61, and the positioning ring 71 is placed in the ring groove 6, and the tooth edge groove 61 is connected with the ring groove 6. When the positioning member 7 needs to be removed, the technicians in this field only need to remove the positioning ring 71 and pull the positioning ring 71 out of the ring groove 6, so that the tooth edge 72 can also be removed from the tooth edge groove 61 to complete the removal of the positioning member 7;The adjacent tooth edges 72 are inclined in opposite directions. The two adjacent tooth edges 72 are arranged in opposite directions so that when the pipe is in contact with the inner ring 1, the outer peripheral wall of the pipe column is in an arc surface, which makes it easy for the pipe column to rotate circumferentially. The tooth edges 72 are used to position the pipe column circumferentially. After the tooth edges 72 in different directions contact the outer peripheral wall of the pipe column, no matter which side of the pipe column rotates to the tooth edge 72, it will be subject to the resistance of the tooth edge 72 arranged in the opposite direction to the rotation direction. The pipe column is not easy to rotate under the resistance of the tooth edge 72; a convex-shaped tooth edge groove 61 is used, and a convex-shaped tooth edge seat 73 is provided at one end of the tooth edge 72 corresponding to the tooth edge groove 61. The convex-shaped tooth edge seat 73 is used to abut against the side wall corresponding to the tooth edge groove 61, so that the tooth edge does not It is easy to get out of the tooth edge groove 61, and the connection stability is improved. In this solution, the tooth edge groove 61 and the tooth edge seat 73 are both set to a convex shape to improve the connection stability between the tooth edge 72 and the tooth edge groove 61. In other solutions, those skilled in the art can also use other polygonal limiting structures to improve the connection stability between the tooth edge groove 61 and the tooth edge 72; the tooth edge 72 is provided with a rubber edge 74 along its length direction on the side facing the pipe column, and the rubber edge 74 is in contact with the outer peripheral wall of the pipe column. The rubber edge 74 is provided on the side facing the pipe column, and the rubber edge 74 can contact the pipe column. When the pipe column contacts the bearing, it is not easy to wear the surface of the pipe column. The friction between the rubber and the pipe column will be greater, and the pipe column is not easy to rotate after being fixed. ;

[0019] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection of the utility model shall be defined by the attached claims and their equivalents.

Claims

1. A plastic bearing for a steering column, comprising an inner ring, an outer ring, a middle ring, a roller arranged between the middle ring and the inner ring, and a retaining frame for limiting the position of the roller, characterized in that: The inner circumferential wall of the inner ring is provided with a plurality of protrusions, and a notch is formed between two adjacent protrusions. An annular groove is provided on the inner ring, and a positioning piece coaxial with the inner ring is provided in the annular groove. The positioning piece and the annular groove are detachably connected and have an interference fit after connection, and the positioning piece can contact the outer circumferential wall of the pipe column placed in the inner ring.

2. A plastic bearing for a steering column according to claim 1, characterized in that: The positioning member includes a positioning ring for plugging and fitting with the annular groove, the positioning ring and the annular groove have an interference fit, the positioning ring is provided with a toothed edge toward each notch, the inner wall of the notch is provided with a toothed edge groove, the toothed edge is plugged and fitted with the toothed edge groove, and the toothed edge groove is connected with the annular groove.

3. A plastic bearing for a steering column according to claim 2, characterized in that: The adjacent tooth edges are arranged to be inclined in opposite directions.

4. The plastic bearing for a steering column according to claim 2, characterized in that: The tooth edge groove is arranged in a convex shape, and one end of the tooth edge connected to the tooth edge groove is provided with a convex tooth edge seat matched with the tooth edge groove, and the tooth edge seat is limitedly matched with the tooth edge groove.

5. The plastic bearing for a steering column according to claim 2, characterized in that: A rubber edge is arranged on one side of the tooth edge facing the pipe column along its length direction, and the rubber edge is in contact with the outer peripheral wall of the pipe column.

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