A self-centering device for cylinder sleeve wheel

Abstract

The present invention discloses a self-centering device for pressing a cylinder sleeve into a wheel. The device comprises a frame, a bottom plate disposed at the bottom of the frame, a top plate disposed at the top, a flat plate disposed on the bottom plate, and a self-centering system disposed on the flat plate. The self-centering system comprises a positioning post elastically connected to the flat plate; a hydraulic cylinder is disposed on the top plate, and a hollow downward-pressing post is connected to the output end of the hydraulic cylinder at a position corresponding to the positioning post. The solution provided by the present invention can improve the center alignment of the cylinder sleeve when pressing into the wheel bolt hole, reduce waste caused by material extruded from the bolt hole due to misalignment, and improve the press-fit yield rate.

Description

Technical Field

[0001] The invention relates to the technical field of wheel assembly, in particular to a self-centering device for a cylinder sleeve wheel. Background Art

[0002] After the processing of some wheel products is completed, the cylinder liner needs to be pressed into the bolt hole position, and the cylinder liner is firmly assembled in the bolt hole by using an interference fit. Due to the existence of processing errors, several bolt holes on the wheel cannot be accurately in the theoretically correct position. There will always be a small amount of error within the allowable deviation range of the drawing. In addition, there is a certain error in the positioning fixture on the press for assembling the cylinder liner. The entire assembly process system including the wheel has the combined effect of multiple errors, resulting in a certain offset between the cylinder liner axis and the wheel bolt hole axis during the process of pressing the cylinder liner of some pressed cylinder liner products into the wheel, resulting in uneven interference between the cylinder liner and the bolt hole. The interference is slightly larger in some positions and smaller in some positions. The position with large interference usually presses the material on the inner wall of the bolt hole out of the bolt hole, resulting in some small protrusions on the wheel flange surface, which does not meet the flatness and concave requirements of the wheel flange surface, thereby affecting the assembly effect of the entire vehicle installation. Summary of the Invention

[0003] In view of this, the present invention aims to provide a self-centering device for pressing a cylinder liner into a wheel, which can achieve adaptive alignment of the cylinder liner axis and the wheel bolt hole axis during the process of pressing the cylinder liner into the wheel bolt hole. To achieve the above purpose, the technical solution of the present invention is implemented as follows:

[0004] A self-centering device for a cylinder wheel sleeve comprises a frame, a bottom plate is provided at the bottom of the frame, a top plate is provided at the top, a flat plate is provided on the bottom plate, a self-centering system is provided on the flat plate, and the self-centering system includes a positioning column elastically connected to the flat plate; a hydraulic cylinder is provided on the top plate, and a downward-pressing hollow column is connected to the output end of the hydraulic cylinder at a position corresponding to the positioning column.

[0005] In some embodiments, the self-centering system includes a T-shaped guide sleeve arranged at the bottom of the flat plate, a compression spring is arranged inside the guide sleeve, the bottom of the positioning column is connected to the compression spring, and the upper part passes through the flat plate and can pass through the wheel bolt hole where the cylinder sleeve needs to be pressed.

[0006] In some embodiments, a ball bearing is provided between the flat plate and the T-shaped guide sleeve.

[0007] In some embodiments, the upper raised portion of the T-shaped guide sleeve is gapped in the groove at the bottom of the flat plate and in the space defined by the cover plate.

[0008] In some embodiments, grooves are provided on the upper and lower surfaces of the upper raised portion of the T-shaped guide sleeve, and balls are provided in the grooves.

[0009] In some embodiments, an oil cup is provided on the cover plate, and the oil cup can lubricate the ball bearings.

[0010] In some embodiments, an O-ring is provided between the positioning post and the plate.

[0011] In some embodiments, the O-ring is disposed in an annular groove formed on the positioning column.

[0012] In some embodiments, the self-centering system further comprises a screw, wherein a bolt portion of the screw passes through a through hole provided at the bottom of the guide sleeve and a compression spring, and is screwed to the bottom of the positioning column.

[0013] In some embodiments, the gap between the outer diameter of the positioning post and the flat plate is 1 mm on one side; the gap between the outer diameter of the guide sleeve and the flat plate is 1 mm on one side.

[0014] Compared with the prior art, the self-centering device for a wheel mounted on a cylinder sleeve according to the present invention has the following advantages:

[0015] The solution provided by the present invention can improve the center concentricity of the cylinder sleeve when it is pressed into the wheel bolt hole, reduce waste generated by the bolt hole material being pressed out due to misalignment, and improve the press-fitting yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 The present invention is a front view of a self-centering device for a cylinder sleeve wheel.

[0018] Figure 2 This is a diagram showing the initial position of a self-centering device for a cylinder sleeve wheel according to the present invention.

[0019] Figure 3 This is a diagram showing the completed press-fit position of a self-centering device for a cylinder sleeve wheel according to the present invention.

[0020] Figure 4 The figure is a schematic diagram of a cylinder sleeve of a self-centering device for a cylinder sleeve wheel according to the present invention.

[0021] Description of reference numerals:

[0022] 1-column, 2-base plate, 3-flat plate, 4-wheel, 5-downward pressure hollow column, 6-connecting plate, 8-top plate, 9-hydraulic cylinder, 11-bracket, 13-foot, 15-guide sleeve, 16-oil cup, 18-O-ring, 19-cylinder liner, 20-positioning column, 23-cover plate, 24-stainless steel sleeve, 25-compression spring, 26-gasket. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0024] The following will clearly and completely describe the technical solutions of the present invention with reference to the accompanying drawings and in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] Reference below Figures 1 to 4 The self-centering device for a wheel with a cylinder sleeve according to an embodiment of the present invention is described in conjunction with an embodiment.

[0026] A self-centering device for pressing a wheel onto a cylinder sleeve comprises a frame, with a base plate 2 disposed at the bottom and a top plate 8 disposed at the top. A flat plate 3 is disposed on the base plate 2, and a self-centering system is provided on the flat plate 3. The self-centering system includes a positioning column 20 elastically connected to the flat plate 3; a hydraulic cylinder 9 is disposed on the top plate 8, and the output end of the hydraulic cylinder 9 is connected downwardly to a hollow downward-pressing column 5 at a position corresponding to the positioning column 20. The self-centering system includes a T-shaped guide sleeve 15 disposed below the flat plate 3, with a compression spring 25 disposed within the guide sleeve 15. The bottom of the positioning column 20 is connected to the compression spring 25, and the upper portion thereof passes through the flat plate 3 and is capable of passing through the wheel bolt hole where the cylinder sleeve is to be pressed. A ball bearing is disposed between the flat plate 3 and the T-shaped guide sleeve 15. The upper raised portion of the T-shaped guide sleeve 15 is spaced within the space defined by the groove at the bottom of the flat plate 3 and the cover plate 23. The ball bearing is disposed within the groove. The upper and lower surfaces of the raised portion of the T-shaped guide sleeve 15 are provided with grooves, and the cover plate 23 is provided with an oil cup 16, which can lubricate the ball bearings. An O-ring 18 is provided between the positioning column 20 and the flat plate 3 for interference fit. The O-ring 18 is set in an annular groove provided on the positioning column 20. The self-centering system also includes a screw, the bolt portion of which passes through a through hole provided at the bottom of the guide sleeve 15 and a compression spring 25, and is screwed to the bottom of the positioning column 20. The gap between the outer diameter of the positioning column 20 and the flat plate 3 is 1 mm per side; the gap between the outer diameter of the guide sleeve 15 and the flat plate 3 is 1 mm per side.

[0027] In some embodiments, a self-centering device for a cylinder sleeve wheel includes a column 1, a base plate 2, a flat plate 3, a wheel 4, a downward pressure hollow column 5, a connecting plate 6, a top plate 8, a hydraulic cylinder 9, a bracket 11, a foot 13, a guide sleeve 15, an oil cup 16, an O-ring 18, a cylinder sleeve 19, a positioning column 20, a cover plate 23, a stainless steel sleeve 24, a compression spring 25, a gasket 26 and other structures.

[0028] The frame also includes four symmetrically distributed columns 1, and a foot 13 is installed at the lower end of each column 1. A top plate 8 is fixedly installed on the top of the four columns 1. A hydraulic cylinder 9 is installed in the middle position of the lower surface of the top plate 8. A connecting plate 6 is installed at the output end of the hydraulic cylinder 9. The lower end of the connecting plate 6 is fixed with a downward-pressing hollow column 5 by screws. The number of the downward-pressing hollow columns 5 is the same as the number of wheel bolt holes and the pitch circle size is the same.

[0029] The self-centering system specifically includes: the lower end of the bracket 11 is fixed to the base plate 2 by two screws, the number of brackets 11 is the same as the number of wheel bolt holes, the upper surfaces of several brackets 11 are connected and fixed to the flat plate 3 by several screws, the O-ring 18 is placed in the groove on the outer circle of the positioning column 20, the upper and lower surfaces of the guide sleeve 15 are designed with a groove structure, and the balls can be evenly placed in the groove structure of the upper and lower surfaces. The cover plate 23 uses several screws to limit the guide sleeve 15 and the balls to be installed in the countersunk hole on the lower surface of the flat plate 3, and ensure that the gap is appropriate and the sliding is smooth. The oil cup 16 is arranged and installed on the cover plate 23, the lower end of the positioning column 20 passes through the through hole on the flat plate 3 and enters the center hole of the guide sleeve 15, and a compression spring 25 is placed between the lower end of the positioning column 20 and the center hole of the guide sleeve 15. The screw passes through the 26 gasket, the stainless steel sleeve 24 and the compression spring 25, and is screwed into the threaded hole at the lower end of the positioning column 20.

[0030] like Figure 2 The number of self-centering systems shown is the same as the number of bolt holes, and the pitch circle diameter where the axes of several self-centering systems are located is the same as the pitch circle diameter where the wheel bolt holes are located.

[0031] In some embodiments, the wheel 4 is first placed on the upper surface of the flat plate 3, and the positioning posts 20 with the same number as the bolt holes are passed through the bolt holes on the wheel 4. After the wheel 4 is positioned, the cylinder sleeve 19 with the same number as the bolt holes is placed on the step on the positioning posts 20. At this time, the hydraulic cylinder 9 starts to press down, driving a number of downward-pressing hollow posts 5 to press down. When the chamfered position of the cylinder sleeve 19 begins to contact the bolt holes on the wheel 4, if there is a slight offset between the cylinder sleeve 19 and the bolt holes, the guide sleeve 15 will move the cylinder sleeve 19 through the positioning posts 20 as the ball rolls, and move it to be concentric with the axis of the wheel bolt hole. As the downward-pressing hollow posts 5 continue to press down, the cylinder sleeve 19 is finally pressed into the wheel bolt hole. Figure 3 As shown, the press-fitting of the cylinder liner 19 is completed.

[0032] In some embodiments, the O-ring 18 can ensure that the positioning post 20 is located at the center of the through hole on the plate 3 when not in operation, and can also play a role in sealing and dust prevention. When the entire self-centering system is adjusted for small radial displacements, the O-ring 18 will undergo elastic extrusion deformation under pressure. After a press-fitting operation is completed, the O-ring 18 will rebound to its original shape.

[0033] In some embodiments, the compression spring 25 can keep the positioning column 20 at a certain height before starting to work. After completing a pressing stroke, the positioning column 20 will rebound to its original height. The height of the stainless steel sleeve 24 cleverly controls the size of the bolt hole at the lower end of the positioning column 20 where the screw is screwed into, so that the height of the space where the compression spring 25 is located can be precisely controlled.

[0034] In some embodiments, the oil cup 16 ensures lubrication of the entire self-centering system, and lubricating oil is regularly injected to ensure smooth sliding of the balls.

[0035] In some embodiments, the gap between the outer diameter of the positioning column 20 and the guide sleeve 15 and the inner diameter of the flat plate 3 is designed to be 1 mm on one side, which is neither too large nor too small. The 1 mm single-side gap is sufficient to meet the error of the entire assembly process system and leave an adjustment margin.

[0036] Compared with the prior art, the self-centering device for a wheel mounted on a cylinder sleeve of the present invention has the following advantages:

[0037] The solution provided by the present invention can improve the center concentricity of the cylinder sleeve when it is pressed into the wheel bolt hole, reduce waste generated by the bolt hole material being pressed out due to misalignment, and improve the press-fitting yield rate.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as limiting the protection content of the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections, or communication; direct or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-centering device for a cylinder sleeve wheel, characterized in that: The invention comprises a frame, wherein a bottom plate (2) is provided at the bottom of the frame, and a top plate (8) is provided at the top; a flat plate (3) is provided on the bottom plate (2); a self-centering system is provided on the flat plate (3); the self-centering system comprises a positioning column (20) elastically connected to the flat plate (3); a hydraulic cylinder (9) is provided on the top plate (8); an output end of the hydraulic cylinder (9) is connected to a downward-pressing hollow column (5) corresponding to the position of the positioning column (20); the self-centering system comprises a T-shaped guide sleeve (15) provided at the bottom of the flat plate (3); a compression spring (25) is provided inside the T-shaped guide sleeve (15); the bottom of the positioning column (20) is connected to the compression spring (25), and the upper part passes through the flat plate (3) and can pass through the wheel bolt hole where the cylinder sleeve needs to be pressed.

2. The self-centering device for a wheel mounted on a cylinder sleeve according to claim 1, characterized in that: A ball bearing is provided between the flat plate (3) and the T-shaped guide sleeve (15).

3. The self-centering device for a wheel mounted on a cylinder sleeve according to claim 2, characterized in that: The upper raised portion of the T-shaped guide sleeve (15) is spaced apart in the groove at the bottom of the flat plate (3) and the space defined by the cover plate (23).

4. The self-centering device for a wheel mounted on a cylinder sleeve according to claim 3, characterized in that: The upper and lower surfaces of the upper raised portion of the T-shaped guide sleeve (15) are provided with grooves, and balls are provided in the grooves.

5. The self-centering device for a wheel mounted on a cylinder sleeve according to claim 4, characterized in that: An oil cup (16) is provided on the cover plate (23), and the oil cup (16) can lubricate the ball bearings.

6. The self-centering device for a wheel mounted on a cylinder sleeve according to claim 5, characterized in that: An O-ring (18) is provided between the positioning column (20) and the flat plate (3) in an interference fit.

7. The self-centering device for a wheel mounted on a cylinder sleeve according to claim 6, characterized in that: The O-ring (18) is arranged in an annular groove formed on the positioning column (20).

8. The self-centering device for a wheel mounted on a cylinder sleeve according to claim 7, characterized in that: The self-centering system also includes a screw, the bolt portion of which passes through the through hole provided at the bottom of the T-shaped guide sleeve (15) and the compression spring (25) and is screwed to the bottom of the positioning column (20).

9. The self-centering device for a wheel mounted on a cylinder sleeve according to claim 7, characterized in that: The gap between the outer diameter of the positioning column (20) and the flat plate (3) is 1 mm on one side; the gap between the outer diameter of the T-shaped guide sleeve (15) and the flat plate (3) is 1 mm on one side.

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