Novel ball screw structure for vehicle

Abstract

A novel ball screw structure for a vehicle comprises a lead screw and a nut which are assembled in a matched mode, balls are arranged in a spiral raceway between the lead screw and the nut, a reverser is arranged on the lead screw, and the reverser is used for enabling the balls to return to the position between the lead screw and the nut to form a circulation loop. In a conventional structure in the prior art, a reverser is arranged on a nut, so that a groove needs to be formed in the nut, and the anti-corrosion performance is reduced. In the invention, the reverser is mounted on the lead screw, so that the nut is prevented from being slotted, the surface of the nut is in a complete state, the sealing performance is high, and the anti-corrosion performance of the whole structure is remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the field of ball screw technology, specifically relating to a novel ball screw structure for automobiles. Background Technology

[0002] A ball screw assembly is a screw-nut pair where balls are the rolling elements. It's a structure that converts rotary motion into linear motion. Its working principle involves machining arc-shaped helical grooves on both the screw and the nut. These two arcs combine to form a helical raceway. Balls are inserted into this raceway. When the screw rotates relative to the nut, the balls roll within the raceway, forcing them to move axially in sync. To prevent the balls from rolling out of the nut, reversing devices are installed at both ends of the helical groove in the nut, allowing the balls to return to the screw and nut, forming a loop.

[0003] Currently, in automotive structures, EMB (Electromechanical Brake) units are distributed across the four wheel hubs and are externally mounted. To ensure the long-term effective operation of this component, high corrosion resistance is required. Therefore, special requirements apply to the ball screw structure, necessitating that the external portion of the nut be enclosed. In existing technology, the conventional external portion of the nut has a return hole, which cannot effectively prevent corrosion. External contaminants may enter the screw through the return hole, causing irreversible damage and thus affecting braking safety.

[0004] Therefore, based on the above situation, this application further designs and improves the structure of automotive ball screws. Utility Model Content

[0005] To address the shortcomings of the existing technology, this utility model provides a novel ball screw structure for automobiles, in which a reverser is installed on the screw, ensuring that the nut surface remains intact, providing strong sealing and significantly improving the overall corrosion resistance of the structure.

[0006] The present invention is solved by the following technical solution.

[0007] A novel ball screw structure for automotive applications includes a matched screw and a nut, with balls arranged in a helical raceway between the screw and the nut. The screw is equipped with a reverser, which enables the balls to return to the screw and nut to form a loop.

[0008] In conventional structures of existing technologies, the reversing device is located on the nut, which requires slotting the nut and reduces its corrosion resistance. In this application, the reversing device is mounted on the lead screw, avoiding slotting the nut and keeping the nut surface intact with strong sealing, thus significantly improving the overall corrosion resistance of the structure.

[0009] In a preferred embodiment, the surface of the lead screw is provided with a reverser mounting groove or a reverser mounting hole, and the reverser is disposed in the reverser mounting groove or the reverser mounting hole.

[0010] In a preferred embodiment, the surface of the lead screw is provided with a plurality of reverser mounting holes, and the reverser is embedded in the reverser mounting holes.

[0011] In a preferred embodiment, the reverser is provided with a ball channel for the balls to pass through, the ball channel being used to connect two adjacent turns of the spiral raceway, so that the path of the balls forms a loop.

[0012] Compared with the prior art, the present invention has the following beneficial effects: it provides a novel ball screw structure for automobiles, in which the reverser is installed on the screw, so that the surface of the nut is in a complete state, with strong sealing, which significantly improves the corrosion resistance of the overall structure. Attached Figure Description

[0013] Figure 1 This is a perspective view of the ball screw structure in this utility model.

[0014] Figure 2 This is a cross-sectional view of the ball screw structure in this utility model.

[0015] Figure 3 This is a schematic diagram of a ball screw structure without a nut.

[0016] Figure 4 This is a schematic diagram of the lead screw in this utility model.

[0017] Figure 5 This is a perspective view of the inverter in this utility model. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] In the following embodiments, the same or similar reference numerals denote the same or similar originals or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] See Figures 1 to 5 The present invention relates to a novel ball screw structure for automobiles, comprising a screw 2 and a nut 3 that are matched and assembled. A ball 4 is provided in a helical raceway 31 between the screw 2 and the nut 3. A reverser 5 is provided on the screw 2, which is used to enable the ball to return to the screw and nut to form a loop.

[0022] Furthermore, in this application, the surface of the lead screw 2 is provided with a reverser mounting groove or a reverser mounting hole, and the reverser 5 is disposed in the reverser mounting groove or the reverser mounting hole.

[0023] In a specific embodiment, as shown in the accompanying drawings, the surface of the lead screw 2 is provided with a plurality of reverser mounting holes 25, and the reverser 5 is embedded in the reverser mounting holes 25. The reverser 5 is provided with a ball channel 55 for the ball 4 to pass through. The ball channel 55 is used to connect two adjacent turns of the helical raceway, so that the path of the ball forms a loop.

[0024] As can be seen from the above description, this application provides a novel ball screw structure for automobiles, in which the reverser 5 is installed on the screw 2, avoiding the nut from being slotted, making the nut surface intact, with strong sealing, and significantly improving the corrosion resistance of the overall structure.

[0025] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A novel ball screw structure for automobiles, comprising a screw (2) and a nut (3) for mating assembly, wherein balls (4) are provided in a helical raceway (31) between the screw (2) and the nut (3), characterized in that, The lead screw (2) is provided with a reverser (5), which is used to enable the ball to return to the lead screw nut to form a loop.

2. The novel ball screw structure for automobiles according to claim 1, characterized in that, The surface of the lead screw (2) is provided with a reverser mounting groove or a reverser mounting hole, and the reverser (5) is provided in the reverser mounting groove or the reverser mounting hole.

3. The novel ball screw structure for automobiles according to claim 2, characterized in that, The lead screw (2) has several reverser mounting holes (25) on its surface, and the reverser (5) is embedded in the reverser mounting holes (25).

4. A novel ball screw structure for automobiles according to any one of claims 1 to 3, characterized in that, The reverser (5) is provided with a ball channel (55) for the ball (4) to pass through.

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