A coating aid for steering gear input shaft splines

Abstract

The utility model relates to a kind of auxiliary tools, more particularly to a kind of coating auxiliary tool of steering input shaft spline.The coating auxiliary tool is composed of outer circle protector and end head protector, and the end head protector is composed of coating connecting rod and end head protective sleeve, and the end head of coating connecting rod is connected with end head protective sleeve.The coating auxiliary tool not only can protect the input shaft outer circle above spline by outer circle protector, so that nylon is not easy to be coated on the input shaft outer circle above spline, but also can protect the input shaft end head below spline by end head protector, so that nylon is not easy to be coated or overflow to the input shaft end face, and further ensure that nylon is not easy to enter the center hole of input shaft.By clamping the coating connecting rod passing through the center hole of input shaft, the input shaft can be fixed, and the connection between the input shaft and the end head protective sleeve can be conveniently maintained by the weight of the input shaft.The problem that the existing protective sleeve can only protect the outer circle of input shaft is solved.

Description

Technical Field

[0001] This utility model relates to an auxiliary tool, specifically a coating tool for the spline of a steering gear input shaft. Background Technology

[0002] The steering gear includes a housing, an input shaft, and a rack. The input shaft has splines that connect it to the steering column, and subsequently to the steering wheel. Because the input shaft is not fixed in place and slides relative to the steering column via the splines, the splines are prone to wear from vehicle vibrations. Worn splines can cause abnormal noises between the steering column and the input shaft during operation. To eliminate these noises and reduce spline wear, a common practice is to coat the splines with a nylon protective layer. This layer protects the splines and also helps to eliminate noises generated by impacts or friction.

[0003] Patent application CN212633315U discloses a protective sleeve for nylon coating on the spline of a steering gear input shaft. It consists of a sleeve body, which is a cylindrical structure formed by the interlocking of sleeve A and sleeve B; sleeve A and sleeve B are each semi-cylindrical. This protective sleeve has a simple structure and good versatility. In use, sleeve A and sleeve B are connected by a connector to achieve closure and opening. The protective plates at the top and bottom of sleeve A and sleeve B allow it to be used for protecting input shafts of different specifications and models. This solves the problem of existing systems requiring a large number of coating suction cups of different specifications for different input shaft models, which leads to some waste. It is particularly suitable for protecting input shafts with spline nylon coating.

[0004] The aforementioned protective sleeve can protect the outer circumference of the steering gear input shaft when nylon is coated, making it difficult for nylon to be coated on the outer circumference of the input shaft below the spline. However, the central hole on the end face of the input shaft is not protected, allowing nylon to easily enter the central hole, thus requiring improvement. Summary of the Invention

[0005] The purpose of this utility model is to provide a coating tool for steering input shaft splines that can effectively protect the steering input shaft and coat only the input shaft splines with nylon.

[0006] The technical solution of this utility model is:

[0007] A coating tool for a steering gear input shaft spline, comprising an outer circle protector and an end protector, characterized in that: the end protector comprises a coating connecting rod and an end protective sleeve, the two ends of the coating connecting rod are respectively provided with threads, and one end of the coating connecting rod is connected to the end protective sleeve by the thread.

[0008] The end protective sleeve is provided with a protective groove.

[0009] The outer circle protector consists of a protective semicircle A, a protective semicircle B, and a cotter pin. One side of the protective semicircle A is movably connected to the protective semicircle B via a pin, and the other side of the protective semicircle A is connected to the protective semicircle B via a cotter pin.

[0010] The upper and lower ends of the protective semicircles A and B are respectively provided with protective inner flanges.

[0011] The beneficial effects of this utility model are as follows:

[0012] The coating applicator for the steering gear input shaft spline not only protects the outer diameter of the input shaft above the spline with an outer diameter protector, preventing nylon from being coated onto this area, but also protects the input shaft end below the spline with an end protector, preventing nylon from being coated or flowing onto the input shaft end face, thus ensuring that nylon does not easily enter the center hole of the input shaft. By clamping the coating connecting rod that passes through the center hole of the input shaft, the input shaft can be fixed in place, and its own weight easily maintains the connection between the input shaft and the end protector. This solves the problem that existing protective sleeves can only protect the outer diameter of the input shaft. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is an isometric schematic diagram of the outer circle protector of this utility model;

[0015] Figure 3 This is a schematic diagram of the usage state of this utility model.

[0016] In the diagram: 1. Coated connecting rod, 2. End protective sleeve, 3. Protective groove, 4. Protective semicircle A, 5. Protective semicircle B, 6. Cotter pin, 7. Protective inner flange, 8. Input shaft, 9. Input shaft spline. Detailed Implementation

[0017] The coating tool for the input shaft spline of this steering gear consists of an outer circle protector and an end protector. The outer circle protector protects the outer circle of the input shaft above the spline, and the end protector protects the end of the input shaft below the spline. The outer circle protector and the end protector work together to protect both the upper and lower ends of the input shaft spline, thereby ensuring that when coating with nylon, only the spline of the input shaft is coated, and the outer circle of the input shaft and the center hole of the input shaft are not easily contaminated.

[0018] The end protector consists of a coating connecting rod 1 and an end protective sleeve 2. Both ends of the coating connecting rod 1 are threaded, and the end protective sleeve 2 is threadedly connected to one end of the coating connecting rod 1. Because both ends of the coating connecting rod 1 are threaded, either end of the coating connecting rod 1 can be connected to the end protective sleeve 2 during use, thus facilitating the use of the coating connecting rod 1. Simultaneously, during use, the coating connecting rod 1 can extend through the center hole of the input shaft to the top end of the input shaft. By clamping the coating connecting rod 1, the input shaft can be fixed, lifted, and transferred, avoiding direct clamping of the input shaft and thus preventing damage from compression. Furthermore, by clamping the coating connecting rod 1, the input shaft's own weight allows it to maintain the connection between the input shaft end face and the end protective sleeve 2, thereby sealing the input shaft end face through the end protective sleeve 2. This prevents nylon from easily entering the center hole of the input shaft during the coating process.

[0019] The end protective sleeve 2 is provided with a protective groove 3, which wraps around the end of the input shaft to protect it. This protection further protects the end face of the input shaft, ensuring that nylon is unlikely to enter the center hole of the input shaft. At the same time, the end protective sleeve 2, through the protective groove 3, restricts the relative position between the end of the input shaft and the end protective sleeve 2, making it difficult for the input shaft to slide relative to the end protective sleeve 2, thus preventing the formation of a gap between the input shaft and the end protective sleeve 2 and ensuring a seal between the end face of the input shaft and the end protective sleeve 2.

[0020] The outer circle protector consists of a protective semicircle A4, a protective semicircle B5, and a cotter pin 6. One side of the protective semicircle A4 is movably connected to the protective semicircle B5 via a pin, and the other side of the protective semicircle A4 is connected to the protective semicircle B5 via the cotter pin 6. The function of the protective semicircle A4 is to wrap around the outer circle of the input shaft above the spline by working in conjunction with the protective semicircle B5, thereby protecting the outer circle of the input shaft above the spline and preventing the nylon coating from adhering to it. Since one side of the protective semicircle A4 is movably connected to the protective semicircle B5 via a pin, and the other side of the protective semicircle A4 is connected to the protective semicircle B5 via the cotter pin 6, removing the cotter pin 6 allows the protective semicircle A4 to be opened relative to the protective semicircle B5, thus facilitating the assembly and disassembly of the outer circle protector and making it convenient to use.

[0021] The upper and lower ends of the protective semicircles A4 and B5 are respectively provided with protective inner flanges 7. The protective inner flanges 7 block the gap between the input shaft and the ends of the protective semicircles A4 and B5, thereby ensuring that nylon cannot easily enter the input shaft above the spline through the gap between the input shaft and the ends of the protective semicircles A4 and B5. At the same time, the outer circle protector is fixed on the input shaft by the limiting of the protective inner flanges 7 and the outer circle shoulder of the input shaft.

[0022] When using the coating tool for the input shaft spline of the steering gear, pull out the cotter pin 6 of the outer circle protector and open the protective semicircles A4 and B5. Secure the protective semicircles A4 and B5 to the input shaft above the spline using the inner protective flange 7. After the protective semicircles A4 and B5 are in place, insert the cotter pin 6 between them to lock their relative positions, thus fixing the outer circle protector to the input shaft. After fixing the outer circle protector, clean the protective groove 3 of the end protector sleeve 2, ensuring that there are no impurities remaining on the inner wall and bottom of the groove 3 to prevent impurities from affecting the seal between the end protector sleeve 2 and the input shaft end. After cleaning the end protector sleeve 2, connect the coating connecting rod 1 to the end protector sleeve 2 via threads. After connection, insert the coating connecting rod 1 into the center hole port of the input shaft below the spline, and let it protrude from the top of the input shaft. Insert the coating connecting rod 1 into the center hole of the input shaft, and simultaneously put the end protective sleeve 2 on the end of the input shaft. After the end protective sleeve 2 is in place, apply coating to the spline of the input shaft.

[0023] The coating applicator for the steering gear input shaft spline not only protects the outer diameter of the input shaft above the spline with an outer diameter protector, preventing nylon from being coated onto this area, but also protects the input shaft end below the spline with an end protector, preventing nylon from being coated or flowing onto the input shaft end face, thus ensuring that nylon does not easily enter the center hole of the input shaft. By clamping the coating connecting rod that passes through the center hole of the input shaft, the input shaft can be fixed in place, and its own weight easily maintains the connection between the input shaft and the end protector. This solves the problem that existing protective sleeves can only protect the outer diameter of the input shaft.

Claims

1. A coating tool for a steering gear input shaft spline, comprising an outer diameter protector and an end protector, characterized in that: The end protector consists of a coated connecting rod (1) and an end protector sleeve (2). The two ends of the coated connecting rod (1) are respectively provided with threads, and the end protector sleeve (2) is connected to one end of the coated connecting rod (1) by the thread.

2. The coating tool for the spline of a steering gear input shaft according to claim 1, characterized in that: The end protective sleeve (2) is provided with a protective groove (3).

3. The coating fixture for the spline of a steering gear input shaft according to claim 1, characterized in that: The outer circle protector consists of a protective semicircle A (4), a protective semicircle B (5) and a cotter pin (6). One side of the protective semicircle A (4) is movably connected to the protective semicircle B (5) through a pin, and the other side of the protective semicircle A (4) is connected to the protective semicircle B (5) through the cotter pin (6).

4. The coating tool for the spline of a steering gear input shaft according to claim 3, characterized in that: The upper and lower ends of the protective semicircles A (4) and B (5) are respectively provided with protective inner flanges (7).

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