A press riveting convex die for a bearing cover plate of an automobile throttle motor shell

Abstract

A riveting punch for a bearing cover plate of an automotive throttle motor housing belongs to the field of throttle motor manufacturing technology. It solves the technical problem of pressing the folded edge of the end cover of the throttle motor housing into the concave notch of the bearing cover plate, thereby fixing the bearing in the bearing chamber. The punch body features a first positioning groove machined on one side for engaging with a positioning protrusion inside the throttle motor housing; a circular groove at the center of the upper plane of the punch body to avoid the central protrusion of the bearing cover plate inside the throttle motor housing; and second positioning grooves evenly distributed around the outer edge of the upper end of the punch body to engage with positioning posts on the bearing cover plate inside the throttle motor housing. A composite protrusion for riveting is provided on the upper plane of the punch body. The beneficial effect is that it provides technical support for the preparation of the throttle motor housing. The composite protrusion contains both a riveting inclined surface and a riveting plane, allowing for one-time riveting, saving riveting time and improving production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of automotive throttle motor manufacturing technology, and specifically relates to a riveting punch for the bearing cover plate of an automotive throttle motor housing. Background Technology

[0002] The throttle motor housing is a crucial component of the automotive engine system. In existing technology, the throttle motor housing is integrally drawn from cold-rolled steel sheet. The left end cap of the housing body has a three-step shape, and concentrically arranged bearing positions are formed within the housing body. A bearing cover plate is interference-fitted to the right of the bearing positions. The problem is that, due to the very thin wall thickness of the housing body, the thinnest part of the three-step end cap after drawing is only 0.7~0.8mm, resulting in very little machining capability. This poses difficulties for the subsequent machining of the inner wall of the bearing positions within the three-step end cap, and the strength of the end cap in the diameter-changing section is relatively low. Furthermore, to ensure the bearing cover plate effectively secures the bearing, the outer diameter of the bearing cover plate and the inner diameter of the housing body are interference-fitted, resulting in low separation strength of this fit.

[0003] 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 accompanying 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.

[0004] To solve the aforementioned technical problems, the applicant has designed a throttle motor housing for automobiles. The housing body and the three-tiered stepped end cap are manufactured separately. The three-tiered stepped end cap is pressed into the inner wall of the housing body and welded to it as a single unit. A bearing cover plate is installed on the inner wall of the right step of the three-tiered stepped end cap. A bearing chamber is formed between the inner walls of the middle and right steps of the three-tiered stepped end cap and the inner wall of the left groove of the bearing cover plate, and a bearing is installed in this bearing chamber. At a position corresponding to the concave notch on the bearing cover plate body, the end cap is folded inward to form a flange. This flange is pressed into the concave notch on the bearing cover plate body, ensuring a complete fit between the flange and the concave notch. However, how to press the flange into the concave notch on the bearing cover plate body to achieve a complete fit, thereby pressing the bearing cover plate body and fixing the bearing in the bearing chamber, is a technical challenge that requires further resolution. 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 a riveting punch for a bearing cover plate of an automobile throttle motor housing, which can press the folded edge of the end cover into the concave notch of the bearing cover plate, so that the folded edge of the end cover and the concave notch of the bearing cover plate are completely fitted together, thereby pressing the bearing cover plate and fixing the bearing in the bearing chamber.

[0006] The technical solution adopted by this utility model includes a solid cylindrical punch body. A first positioning groove is machined on one side of the punch body for cooperating with a positioning protrusion inside the throttle motor housing. A circular groove is provided at the center of the upper plane of the punch body to avoid the central protrusion of the bearing cover plate inside the throttle motor housing. A second positioning groove is evenly distributed around the outer edge of the upper end of the punch body to cooperate with the positioning post on the bearing cover plate inside the throttle motor housing. A composite protrusion for riveting is provided on the upper plane of the punch body. The composite protrusion includes a riveting inclined surface and a riveting plane.

[0007] The angle between the riveting inclined surface and the horizontal plane is 30°, the height between the tip of the riveting inclined surface and the riveting plane is 0.5mm, and the height between the upper surface of the riveting plane and the upper surface of the punch body is 0.5mm.

[0008] The bottom of the punch body is provided with a positioning flange.

[0009] The first positioning groove extends from the upper plane of the punch body to the bottom plane of the positioning flange.

[0010] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model solves the technical problem of pressing the folded edge of the end cover of the automotive throttle motor housing into the concave notch of the bearing cover plate, so that the folded edge of the end cover and the concave notch of the bearing cover plate are completely fitted together, thereby pressing the bearing cover plate and fixing the bearing in the bearing chamber. This provides technical support for the preparation of automotive throttle motor housing.

[0011] (2) In solving the technical problem of pressing the end cover of the split-type automotive throttle motor housing assembly into the concave notch of the bearing cover plate, so that the end cover's folded edge and the bearing cover plate's concave notch are completely fitted together, thereby pressing the bearing cover plate and then fixing the bearing in the bearing chamber, the applicant designed two punches, namely a pressing bevel punch and a pressing flat punch. After testing, a composite punch with both a pressing bevel and a pressing flat punch was adopted, which can complete the pressing of the end cover and the bearing cover plate in one step. The pressing bevel is used to turn the end cover inward to form a folded edge at the position corresponding to the concave notch of the bearing cover plate, and the pressing flat punch is used to press the end cover's folded edge into the concave notch of the bearing cover plate, so that the end cover's folded edge and the bearing cover plate's concave notch are completely fitted together, thereby pressing the bearing cover plate body and then fixing the bearing in the bearing chamber, saving pressing time and improving production efficiency. Attached Figure Description

[0012] Figure 1 This is the front view of this utility model. Figure 2 yes Figure 1 Top view, Figure 3 yes Figure 2 AA section view, Figure 4 yes Figure 3 A magnified view of part B. Figure 5 This is a schematic diagram of the usage state of this utility model.

[0013] In the picture: 1.Punch body, 1-1. Positioning flange; 1-2. First positioning groove; 1-3. Circular groove; 1-4. Second positioning groove. 1-5. Composite protrusions, 1-5-1. Riveting bevel, 1-5-2. Riveting plane. Ɑ. The angle between the riveting bevel and the horizontal plane. H1. Height between the apex of the riveting bevel and the riveting plane H2. The height between the upper plane of the riveting plane and the upper plane of the punch body. 2. Press worktable, 3. Throttle motor housing body, 4. Bearing cover plate, 5. Bearings 6. End cap, 7. Screws. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] like Figures 1-4 As shown, the technical solution adopted by this utility model includes a solid cylindrical punch body 1. The bottom of the punch body 1 is provided with a positioning flange 1-1. A first positioning groove 1-2 for cooperating with a positioning protrusion inside the throttle motor housing is machined on one side of the punch body 1. The first positioning groove 1-2 extends from the upper plane of the punch body 1 to the bottom plane of the positioning flange 1-1. A circular groove 1-3 for avoiding the central protrusion of the bearing cover plate inside the throttle motor housing is provided at the center of the upper plane of the punch body 1. Six grooves for cooperating with the bearing cover plate inside the throttle motor housing are evenly distributed around the outer edge of the upper end of the punch body 1. The body has a second positioning groove 1-4 with 6 positioning pins. A composite protrusion 1-5 for riveting is provided on the upper surface of the punch body 1. The composite protrusion 1-5 includes a riveting inclined surface 1-5-1 and a riveting plane 1-5-2. The riveting inclined surface 1-5-1 is used to fold the end cover inward to form a folded edge at the position corresponding to the concave notch of the bearing cover body. The riveting plane 1-5-2 is used to press the folded edge of the end cover into the concave notch on the bearing cover body, so that the folded edge of the end cover is completely fitted with the concave notch of the bearing cover body, thereby pressing the bearing cover body and fixing the bearing in the bearing chamber.

[0016] The angle α between the riveting inclined surface 1-5-1 and the horizontal plane is 30°. The height H1 between the tip of the riveting inclined surface 1-5-1 and the riveting plane 1-5-2 is 0.5mm. The height H2 between the upper plane of the riveting plane 1-5-2 and the upper plane of the punch body 1 is 0.5mm. like Figure 5 As shown, in use, first, fix the present invention to the press worktable 2 using screws 7 via the positioning flange 1-1 at the bottom of the punch body 1. Then, place the bearing cover plate 4 in the throttle motor housing onto the upper surface of the punch body 1 of the present invention, that is, insert the 6 positioning pins on the bearing cover plate 4 into the 6 positioning grooves 1-4 on the upper surface of the punch body 1 of the present invention. Then, place the bearing 5 into the groove of the bearing cover plate 4. Finally, press the end cover 6 into the inner wall of the throttle motor housing body 3 and weld it to the housing body. The integrated automotive throttle motor housing is mounted on the punch body 1 of this utility model. Under the pressure of the press head, the riveting bevel 1-5-1 first folds the end cover 6 inward at the position corresponding to the concave notch of the bearing cover plate 4 to form a folded edge. Then, the press head continues to press down, and the riveting plane 1-5-2 presses the folded edge of the end cover 6 into the concave notch on the bearing cover plate 4, so that the folded edge of the end cover 6 and the concave notch of the bearing cover plate 4 are completely fitted together, thereby pressing the bearing cover plate 4, and then fixing the bearing 5 in the bearing chamber.

Claims

1. A riveting punch for a bearing cover plate of an automotive throttle motor housing, comprising a solid cylindrical punch body (1), characterized in that, A first positioning groove (1-2) for cooperating with the positioning protrusion inside the throttle motor housing is machined on one side of the punch body (1). A circular groove (1-3) for avoiding the central protrusion of the bearing cover plate inside the throttle motor housing is provided at the center of the upper plane of the punch body (1). A second positioning groove (1-4) for cooperating with the positioning post on the bearing cover plate inside the throttle motor housing is evenly distributed around the outer edge of the upper end of the punch body (1). A composite protrusion (1-5) for riveting is provided on the upper plane of the punch body (1). The composite protrusion (1-5) contains a riveting inclined surface (1-5-1) and a riveting plane (1-5-2).

2. The riveting punch for the bearing cover plate of an automotive throttle motor housing according to claim 1, characterized in that, The angle (α) between the riveting inclined surface (1-5-1) and the horizontal plane is 30°, the height (H1) between the tip of the riveting inclined surface (1-5-1) and the riveting plane (1-5-2) is 0.5mm, and the height (H2) between the upper plane of the riveting plane (1-5-2) and the upper plane of the punch body (1) is 0.5mm.

3. A riveting punch for a bearing cover plate of an automotive throttle motor housing according to claim 1 or 2, characterized in that, The bottom of the punch body (1) is provided with a positioning flange (1-1).

4. The riveting punch for a bearing cover plate of an automotive throttle motor housing according to claim 3, characterized in that, The first positioning groove (1-2) extends from the upper plane of the punch body (1) to the bottom plane of the positioning flange (1-1).

Images