Novel noise reduction adjusting flexible shaft for automobile seat

Abstract

The utility model relates to a novel noise reduction adjusting flexible shaft for an automobile seat, which is characterized by comprising a connecting protective tube and shaft cores, the shaft cores are symmetrically arranged on two sides of the connecting protective tube, the connecting protective tube is used for prolonging the length of the flexible shaft, one end of each shaft core is connected with the connecting protective tube to serve as a connecting end, and the other end of each shaft core is connected with the connecting protective tube. One end of the shaft core extends outwards in the direction away from the connecting protection pipe to serve as an extending end so that torque can be transmitted, and a steel wire layer and a flocking layer are arranged on the periphery of the shaft core. The utility model has the following advantages and effects: the contact area between the shaft core and the inner wall of the connecting protection pipe is reduced while the transmission torque is not influenced, so that the noise generated during use is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive flexible shafts, and particularly relates to a new noise-reducing adjustable flexible shaft for automotive seats. Background Art

[0002] During the adjustment of automotive seats, rotational movement around the axis and rotational or swinging movements deviating from the axis occur. At this time, a rigid transmission shaft cannot be used, and a flexible shaft must be used for torque transmission. Currently, flexible shafts mainly consist of a flexible shaft core and a protective tube sleeved on the shaft core.

[0003] For example, the Chinese patent document with the publication number CN103307086A discloses a fully flocked flexible shaft, which includes a shaft core. At least two layers of steel wire layers are provided on the outer surface of the shaft core. The steel wire layers are formed by arranging multiple steel wires in parallel and spirally winding them. The outer surface of the outermost steel wire layer is completely covered with a flocked layer, and the flocked layer is formed by spirally winding multiple floss threads.

[0004] In the above technical solution, the flexible shaft is a flexible shaft with multiple layers of steel wire layers wound and the outermost layer completely covered with a flocked layer. After the two ends of the flexible shaft are upset to form square heads and are matched with square holes, the fluff of the flocked layer increases in size, reducing or eliminating the gap between the square head of the flexible shaft and the square hole, and reducing noise during high-speed operation.

[0005] However, after the protective tube is sleeved on the flexible shaft, the shaft core of the flexible shaft can completely cover the protective tube, resulting in a large contact area between the shaft core of the flexible shaft and the inner wall of the protective tube. Therefore, a large amount of friction and vibration will occur between the shaft core of the flexible shaft and the inner wall of the protective tube when the shaft core is stressed, resulting in a relatively large overall noise. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a new noise-reducing adjustable flexible shaft for automotive seats, which can avoid the contact area between the flocked surface of the shaft core and the inner wall of the connecting protective tube while not affecting torque transmission, so as to reduce the noise generated during use.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A new noise-reducing adjustable flexible shaft for automotive seats, which includes a connecting protective tube and a shaft core. The shaft core is symmetrically arranged on both sides of the connecting protective tube. The connecting protective tube is used to extend the length of the flexible shaft. One end of the shaft core is connected to the connecting protective tube as a connecting end, and the other end extends outward in a direction away from the connecting protective tube as an extending end to transmit torque. A steel wire layer and a flocked layer are provided on the outer periphery of the shaft core.

[0008] The utility model is further arranged as follows: The end of the connecting protective tube is provided with a connecting square groove extending inward, and the cross-section of the connecting end is adapted to the connecting square groove.

[0009] The present utility model is further configured such that: the connecting protective tube is rigid and the shaft core is flexible.

[0010] The present utility model is further configured such that: the steel wire layer includes steel wires, and the steel wires are wound around the outer periphery of the shaft core along a spiral path.

[0011] The present utility model is further configured such that: the flocked layer includes floss, and the floss is wound around the outer periphery of the shaft core along a spiral path, and the floss is arranged at intervals with the steel wires.

[0012] The present utility model is further configured such that: the end of the extension end is a square head or a round head.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] Due to the provision of the connecting protective tube and the shaft cores connected to both ends of the connecting protective tube, the overall length of the flexible shaft is extended through the connecting protective tube. While the shaft cores on both sides can be connected to the components on both sides to achieve torque transmission, in this solution, the shaft core is not a whole long strip structure but a short strip structure provided at both ends of the connecting protective tube. In this way, the contact area between the shaft core and the connecting protective tube can be reduced, and thus the noise generated during use can be reduced. Therefore, the technical problem in the prior art that the contact area between the shaft core and the inner wall of the protective tube is relatively large, resulting in a relatively large noise during use, is effectively solved. Furthermore, while not affecting torque transmission, the noise generated during use can be reduced. And compared with the prior art where the shaft core is a whole long strip structure, this solution can reduce the raw materials required for producing the shaft core in a single flexible shaft, and thus the production cost of the shaft core can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the specific structure of the connecting protective tube in the present utility model;

[0017] Figure 3 is a schematic diagram of the specific structure of the shaft core in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0020] As Figures 1 to 3 shown, the present utility model discloses a novel noise-reducing adjusting flexible shaft for an automobile seat, which includes a connecting protective tube 1 and a shaft core 2. The shaft core 2 is symmetrically arranged on both sides of the connecting protective tube 1. The connecting protective tube 1 is used to extend the length of the flexible shaft. One end of the shaft core 2 is connected to the connecting protective tube 1 as a connecting end 21, and one end extends outward along the direction away from the connecting protective tube 1 as an extending end 22 to transmit torque. A steel wire 3 layer and a flocking layer are provided on the outer periphery of the shaft core 2. Due to the arrangement of the connecting protective tube 1 and the shaft core 2 connected to both ends of the connecting protective tube 1, the overall length of the flexible shaft is extended through the connecting protective tube 1. While the shaft cores 2 on both sides can be connected to the components on both sides to achieve torque transmission, in this solution, the shaft core 2 is not a whole long strip structure, but a short strip structure arranged at both ends of the connecting protective tube 1. In this way, the contact area between the shaft core 2 and the connecting protective tube 1 can be reduced, and thus the noise generated during use can be reduced. Therefore, while not affecting the transmission of torque, the noise generated during use can be reduced. And compared with the prior art in which the shaft core 2 is a whole long strip structure, this solution can reduce the raw materials required for producing the shaft core 2 in a single flexible shaft, and thus can reduce the production cost of the shaft core 2.

[0021] In this embodiment, the connection structure between the shaft core 2 and the connecting protective tube 1 is that a connecting square groove 101 extending inward is provided at the end of the connecting protective tube 1, and the cross-section of the connecting end 21 is adapted to (or fixedly connected to) the connecting square groove 101. Therefore, when connecting the shaft core 2 and the connecting protective tube 1, by inserting the connecting end 21 of the shaft core 2 into the connecting square groove 101, the friction force generated by the contact between the two can be used for fixation. And by setting the cross-section of the connecting square groove 101 to be square, the contact between the connecting end 21 and the connecting square groove 101 can be made more sufficient, so as to increase the contact area between the connecting end 21 and the connecting square groove 101 and further improve the connection stability between the two;

[0022] In addition, after inserting the connection end 21 of the shaft core 2 into the connection square groove 101, the end of the connection protection tube 1 can be stamped by a press to further improve the stability of the connection between the connection end 21 and the connection square groove 101, so as to ensure that there will be no vibration between the connection end 21 and the connection square groove 101 during use, and further reduce the noise generated during use.

[0023] In this embodiment, the connection protection tube 1 is specifically rigid, the shaft core 2 is flexible, the steel wire 3 layer is specifically formed by winding the steel wire 3 around the outer periphery of the shaft core 2 along a spiral path, and the flocking layer is specifically formed by winding the floss 4 around the outer periphery of the shaft core 2 along a spiral path. The floss 4 and the steel wire 3 are arranged at intervals. The settings of the steel wire 3 layer and the flocking layer are both prior arts, so they will not be elaborated here.

[0024] In this embodiment, the end of the extension end 22 is a square head or a round head. Since the connection between the flexible shaft and the component mainly adopts two fixing methods of square head and round head, and the square head and the round head have different characteristics and are suitable for different scenarios, by setting the end of the extension end 22 as a square head or a round head, it is convenient to adapt to the above fixing methods, so as to be applicable to different scenarios and expand the scope of application.

[0025] This specific embodiment is only an interpretation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A new noise reduction adjustable flexible shaft for automotive seats, characterized in that, It includes a connecting protective tube and a shaft core. The shaft core is symmetrically arranged on both sides of the connecting protective tube. The connecting protective tube is used to extend the length of the flexible shaft. One end of the shaft core is connected to the connecting protective tube as a connecting end, and the other end extends outward along the direction away from the connecting protective tube as an extending end to transmit torque. A steel wire layer and a flocked layer are provided on the outer periphery of the shaft core.

2. The novel noise reduction and adjustment flexible shaft for an automotive seat according to claim 1, characterized in that, A connecting square groove extending inward is provided at the end of the connecting protective tube, and the cross-section of the connecting end is adapted to the connecting square groove.

3. A novel noise-reducing adjustable flexible shaft for an automotive seat according to claim 1 or 2, characterized in that, The connecting protective tube is rigid, and the shaft core is flexible.

4. A novel noise reduction adjustable flexible shaft for an automotive seat according to claim 1, characterized in that, The steel wire layer includes steel wires, and the steel wires are wound around the outer periphery of the shaft core along a spiral path.

5. A novel noise-reducing adjustable flexible shaft for an automotive seat according to claim 4, characterized in that, The flocked layer includes floss, and the floss is wound around the outer periphery of the shaft core along a spiral path, and the floss is arranged at intervals with the steel wires.

6. The novel noise reduction adjustable flexible shaft for an automotive seat according to claim 1, characterized in that, The end of the extending end is a square head or a round head.

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