A throttle motor housing for automobiles

Abstract

A throttle motor housing for automobiles, belonging to the field of automotive throttle technology, overcomes the problems of the traditional throttle motor housing being stretched into a one-piece structure, which has very small machinable volume in the diameter-changing section after stretching, making processing difficult and resulting in low strength for detachment from the bearing cover. The key feature is that the housing body is made of seamless steel tubing, and the end cap is pressed into the housing and welded to it as a single unit. A bearing cover is installed on the inner wall of the step at the right end of the end cap. The bearing cover body has circumferentially distributed recessed notches on the bottom plane at the right end, and a left-end groove is provided at the left end. At the position corresponding to the recessed notches on the bearing cover body, the end cap is folded inward to form a flange, which is then pressed into the recessed notches of the bearing cover body, thereby fixing the bearing in the bearing chamber. The advantages are simple and low-cost manufacturing process, easy processing, improved housing strength, improved bearing cover fixation effect on the bearing, and increased bearing service life.

Description

Technical Field

[0001] This utility model belongs to the field of automotive throttle body technology, and specifically relates to an automotive throttle body motor housing. Background Technology

[0002] The throttle motor housing is an important component of the automotive engine system.

[0003] In the prior art, the throttle motor housing of an automobile is made of cold-rolled steel sheet stretched into a one-piece structure. Its shape is similar to that shown in the attached drawing of the utility model application CN202420744273.6, which discloses a "glass regulator motor housing". Specifically, the housing body is integrally stretched from cold-rolled steel sheet, the left end cap of the housing is in a three-step shape, and concentrically arranged bearing positions are formed within the housing body. In the prior art, the automobile throttle motor housing has a bearing cover plate interference-fitted to the right of the bearing positions within the integrally stretched housing body. The problem is that... Firstly, because the wall thickness of the shell body is only 1.0 to 1.1 mm, the thinnest part of the variable diameter section with a three-step shape at one end of the stretched end cap is only 0.7 to 0.8 mm, and the amount of cutting is very small. This makes it difficult to process the inner wall of the bearing position and the outer wall of the variable diameter section of the subsequent three-step end cap. In addition, the strength of the variable diameter end cap is low. Secondly, in order to ensure the fixing effect of the bearing cover plate on the bearing, the outer diameter of the bearing cover plate and the inner diameter of the shell body adopt an interference fit. The separation strength of this fit structure is small, only about 2800 N.

[0004] Utility model application CN201320382006.0 discloses "a split-type motor housing". This utility model includes a housing body for sealing connection with an end cover. The housing body includes a top cover, a connecting portion, and a receiving portion manufactured using a stretching process. The top cover, receiving portion, and connecting portion are connected sequentially, and both ends of the receiving portion are fixedly connected to the top cover and the connecting portion, respectively. This utility model divides the motor housing body into three parts: a top cover, a receiving portion, and a connecting portion, making the structure of the motor housing more complex. As can be seen from the attached drawings, a bearing chamber is provided in the top cover portion, and a bearing is installed therein. The inner ring of the bearing is fixed by a shoulder, which will affect the service life of the bearing. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an automotive throttle motor housing with a large amount of machinable material in the three-step end cap part, easy processing of the inner wall of the bearing position and the outer wall of the housing in the subsequent three-step end cap part, and high strength in the three-step end cap part; and to improve the fixing effect of the bearing cover plate on the bearing and the strength of the fit and disengagement, without affecting the service life of the bearing.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model includes a housing body, an end cap, and a bearing. The end cap is a three-tiered stepped shape. After being pressed into the inner wall of the housing body, the end cap is welded to the housing body as a whole. A bearing cover plate is installed on the inner wall of the right step of the three-tiered stepped end cap. The bearing cover plate includes a bearing cover plate body. There are circumferentially distributed concave notches on the bottom plane of the right end of the bearing cover plate body. A left end groove is provided at the left end of the bearing cover plate body. A bearing chamber is formed between the inner wall of the middle step and the inner wall of the right step of the three-tiered stepped end cap and the inner wall of the left end groove of the bearing cover plate. The bearing is installed in the bearing chamber. At the position corresponding to the concave notch on the bearing cover plate body, the end cap is folded inward to form a folded edge. The folded edge is pressed into the concave notch on the bottom plane of the right end of the bearing cover plate body so that the folded edge and the concave notch are completely fitted together, thereby pressing the bearing cover plate body and fixing the bearing in the bearing chamber.

[0007] The housing body is made of seamless steel pipe. Inside the housing body, there is a positioning protrusion for installing the stator core, and there is also a wire outlet on the housing body.

[0008] The thickness of the end cap is greater than the thickness of the shell body, specifically 1.5 to 1.6 mm, and the thickness of the finished end cap is 1.1 mm to 1.2 mm.

[0009] An angle plate for engine assembly is installed on the outer wall of the middle step of the three-step stepped end cover. A cylindrical protrusion is provided at the center of the bottom plane of the right end of the bearing cover body. Six positioning posts are evenly distributed on the outer edge of the bottom plane of the right end of the bearing cover body. A clearance groove for avoiding the positioning protrusion inside the housing body is also provided on the bottom plane of the right end of the bearing cover body.

[0010] The depth of the recessed notch on the bottom plane of the right end of the bearing cover plate body is 1.5mm.

[0011] Compared with the prior art, the beneficial effects of this utility model are: (1) The shell body of this utility model is made of seamless steel pipe, which is simpler and cheaper than the steel plate stretching and forming manufacturing process.

[0012] (2) The end cap with a three-step shape of this utility model is set separately from the shell body. The thickness of the end cap with a three-step shape can be increased to be greater than the thickness of the shell body, that is, from 0.7mm~0.8mm to 1.5~1.6mm, which increases the amount of cutting, making it easier to process the inner wall of the bearing position inside the end cap and the mating surface of the outer wall of the shell. The thickness of the end cap after finishing is 1.1mm~1.2mm, thus improving the strength of the end cap with a three-step shape, and also improving the strength of the shell.

[0013] (3) The bearing cover plate of this utility model adopts a clearance fit with the inner wall of the housing body. By adding 3 to 6 1.5mm deep concave notches to the bearing cover plate, after the bearing is pressed into the bearing chamber, the bearing cover plate is pressed tightly by the end cap fold at the corresponding 3 to 6 concave notches, thereby fixing the bearing in the bearing chamber. The separation strength of this press-fit structure can reach 5000N to 7000N, which improves the fixing effect and separation strength of the bearing cover plate on the bearing, and also improves the service life of the bearing. Attached Figure Description

[0014] Figure 1 This is the front view of this utility model. Figure 2 yes Figure 1 Left view, Figure 3 yes Figure 1 The right view, Figure 4 yes Figure 2 AA section view, Figure 5 yes Figure 4 A magnified view of part B. Figure 6 This is the front view of the bearing cover plate of this utility model. Figure 7 yes Figure 6 Left view, Figure 8 yes Figure 6 The right view, Figure 9 yes Figure 8 CC section view.

[0015] In the picture: 1. Shell body, 1-1. Positioning protrusion; 1-2. Cable outlet. 2. End cap, 2-1. Folded edge, 3. Corner board, 4. Bearing cover plate, 4-1. Bearing cover plate body; 4-2. Recessed notch; 4-3. Cylindrical protrusion; 4-4. Positioning post. 4-5. Left end groove; 4-6. Avoidance groove. 5. Bearings. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] like Figures 1-5As shown, the technical solution adopted by this utility model includes a cylindrical shell body 1 with openings at both the left and right ends. The shell body 1 is made of seamless steel pipe. A positioning protrusion 1-1 for installing the stator core is provided inside the shell body 1. A wire outlet 1-2 is also provided on the shell body 1. An end cap 2 is fixedly connected to the left end of the shell body 1. More specifically, the end cap 2 is a three-step shape, and the thickness of the three-step end cap 2 is greater than the thickness of the shell body 1. In this embodiment, it is 1.5-1.6 mm. The end cap 2 is pressed into the inner wall of the housing body 1 and welded to the housing body 1 as a whole. Then, the inner and outer mating surfaces of the three-step end cap 2 are precision machined. After precision machining, the thickness of the three-step end cap 2 is 1.1mm to 1.2mm. A mounting plate 3 for engine assembly is installed on the outer wall of the middle step of the three-step end cap 2. A bearing cover plate 4 is installed on the inner wall of the right step of the three-step end cap 2. The right step of the three-step end cap 2 is provided with an inwardly turned flange 2-1. like Figures 6-9 As shown, the bearing cover plate 4 includes a bearing cover plate body 4-1. On the bottom right end of the bearing cover plate body 4-1, there are 3 to 6 recessed notches 4-2 evenly distributed around the circumference for cooperating with the folded edge 2-1 of the end cover 2. A cylindrical protrusion 4-3 is provided at the center of the bottom right end of the bearing cover plate body 4-1. Six positioning posts 4-4 are evenly distributed on the outer edge of the bottom right end of the bearing cover plate body 4-1. A left end groove 4-5 is provided at the left end of the bearing cover plate body 4-1. A clearance groove 4-6 is also provided on the bottom right end of the bearing cover plate body 4-1 to avoid the positioning protrusion 1-1 inside the housing body 1. like Figure 4 and Figure 5 As shown, a bearing chamber is formed between the inner wall of the middle step and the inner wall of the right step of the three-tiered stepped end cap 2 and the left end groove 4-5 of the bearing cover plate 4, and the bearing 5 is installed in the bearing chamber. After the bearing 5 is pressed into the bearing chamber, the end cap 2 is turned inward to form a folded edge 2-1 at the position corresponding to the concave notch 4-2 on the bearing cover plate body 4-1. The folded edge 2-1 is then pressed into the concave notch 4-2 on the bottom right end of the bearing cover plate body 4-1, so that the folded edge 2-1 and the concave notch 4-2 are completely fitted together, thereby pressing the bearing cover plate body 4-1 and fixing the bearing 5 in the bearing chamber.

[0018] In use, the stator core is installed in the housing body 1. The stator core is positioned by the six positioning posts 4-4 on the bearing cover plate body 4-1 and the positioning protrusion 1-1 in the housing body 1. The stator core leads out through the outlet 1-2, and are assembled with the engine through the left step of the three-stage stepped end cover 2, and are fixedly connected to the engine through the hanging angle plate 3.

Claims

1. A throttle motor housing for automobiles, comprising a housing body (1), an end cover (2), and a bearing (5), wherein the end cover (2) is a three-tiered trapezoidal shape, characterized in that, The end cap (2) is pressed into the inner wall of the housing body (1) and welded to the housing body (1) as a whole. A bearing cover plate (4) is installed on the inner wall of the right step of the three-stage stepped end cap (2). The bearing cover plate (4) includes a bearing cover plate body (4-1). There are concave notches (4-2) evenly distributed around the bottom plane of the right end of the bearing cover plate body (4-1). A left end groove (4-5) is provided at the left end of the bearing cover plate body (4-1). The inner walls of the middle step and the right step of the three-stage stepped end cap (2) are connected to the bearing cover plate (4-1). A bearing chamber is formed between the inner walls of the left end groove (4-5) and the bearing (5) is installed in the bearing chamber. At the position corresponding to the concave notch (4-2) on the bearing cover body (4-1), the end cover (2) is turned inward to form a folded edge (2-1). The folded edge (2-1) is pressed into the concave notch (4-2) on the bottom plane of the right end of the bearing cover body (4-1) so that the folded edge (2-1) and the concave notch (4-2) are completely fitted together, thereby pressing the bearing cover body (4-1) and then fixing the bearing (5) in the bearing chamber.

2. The automotive throttle motor housing according to claim 1, characterized in that, The housing body (1) is made of seamless steel pipe. Inside the housing body (1), there is a positioning protrusion (1-1) for installing the stator core. The housing body (1) is also provided with a wire outlet (1-2).

3. The automotive throttle motor housing according to claim 1, characterized in that, The thickness of the end cap (2) is greater than the thickness of the shell body (1), specifically 1.5 to 1.6 mm, and the thickness of the finished end cap (2) is 1.1 mm to 1.2 mm.

4. The automotive throttle motor housing according to claim 1, characterized in that, An angle plate (3) for assembling with the engine is installed on the outer wall of the middle step of the three-step stepped end cover (2). A cylindrical protrusion (4-3) is provided at the center of the bottom plane of the right end of the bearing cover body (4-1). Six positioning posts (4-4) are evenly distributed on the outer edge of the bottom plane of the right end of the bearing cover body (4-1). A clearance groove (4-6) for avoiding the positioning protrusion (1-1) inside the housing body (1) is also provided on the bottom plane of the right end of the bearing cover body (4-1).

5. The automotive throttle motor housing according to claim 1, characterized in that, The depth of the recessed notch on the bottom plane of the right end of the bearing cover plate body (4-1) is 1.5mm.

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