Split guide wheel and hydraulic torque converter

Abstract

The utility model discloses a split guide wheel and a hydraulic torque converter, and relates to the field of hydraulic torque converters, the split guide wheel comprises a guide wheel body and a guide wheel inner ring, the periphery of the guide wheel body is provided with a plurality of blades, the secondary periphery is provided with a plurality of reinforcing ribs, and the inner periphery is provided with an internal spline; the guide wheel inner ring is assembled on the outer circle of the guide wheel body, a first turnup and a second turnup are arranged on the periphery of the guide wheel inner ring, and the first turnup and the second turnup are connected through an inner concave face. The guide wheel body and the guide wheel inner ring are designed in a split mode, a die drawing mechanism can be designed on the circumference of a guide wheel blade in a casting die, and the high-pressure casting process requirement is met; and the guide wheel blades adopt double curved surfaces, so that high-efficiency manufacturing of the hydraulic torque converter is ensured.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic torque converters, in particular to a split guide wheel and a hydraulic torque converter. Background Art

[0002] The torque converter is the main component of hydraulic transmission. It is widely used in engineering machinery, lifting and transportation machinery, internal combustion locomotives and other fields due to its advantages such as automatic adaptability, shockproof and isolation, penetration performance, and overload protection. The main working components of the torque converter are three working wheels: pump wheel, turbine wheel and guide wheel. Each working wheel has blades with space curved surface shape evenly distributed along the circumference.

[0003] At present, the manufacturing process of hydraulic torque converter impeller generally includes stamping and welding forming and aluminum alloy integral casting. Compared with stamping and welding forming, the blade shape of the cast impeller is a hyperbolic surface. Therefore, the cast hydraulic torque converter has high efficiency, is easy to organize production, and is finally widely used. The current hydraulic torque converter guide wheel is formed by integral casting of aluminum alloy. The guide wheel body blades and the guide wheel inner ring are cast as one, which makes it impossible to design a demolding mechanism on the circumference of the guide wheel blades in the casting mold, and the high-pressure casting process cannot be used; the guide wheel blades are manufactured by stamping process, and are combined with the guide wheel body and the guide wheel inner ring by welding. Because the blades have no hyperbolic shape, the final efficiency of the hydraulic torque converter is low; the aluminum alloy integral casting guide wheel adopts gravity casting process, and its production process produces a large amount of casting sand that pollutes the environment, the surface finish and dimensional accuracy of the blades are poor, and the material utilization rate and production efficiency are low. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a split guide wheel and a hydraulic torque converter, in which the guide wheel body and the guide wheel inner ring are designed separately, and a demolding mechanism can be designed on the circumference of the guide wheel blade in the casting mold to meet the requirements of the high-pressure casting process; the guide wheel blade adopts a hyperbolic surface to ensure the efficient manufacturing of the hydraulic torque converter.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] In a first aspect, an embodiment of the present utility model provides a split guide wheel, comprising:

[0007] The guide wheel body has a plurality of blades on its outer periphery, a plurality of reinforcing ribs arranged on its sub-outer periphery, and an inner spline on its inner periphery;

[0008] The inner ring of the guide wheel is assembled on the outer ring of the guide wheel. The outer periphery of the inner ring of the guide wheel is provided with a first flange and a second flange, and the first flange and the second flange are connected by an inner concave surface.

[0009] As a further implementation, the first flange and the second flange have different widths.

[0010] As a further implementation, the inner concave surface is eccentrically arranged.

[0011] As a further implementation method, the inner ring of the guide wheel is in contact with the outer edge of the blade.

[0012] As a further implementation method, the guide wheel inner ring and the guide wheel body are fixed by welding.

[0013] As a further implementation, the blades are distributed in a circular array.

[0014] As a further implementation, the blade is a hyperbolic structure.

[0015] As a further implementation method, the guide wheel body is integrally formed by high-pressure casting.

[0016] As a further implementation method, the inner ring of the guide wheel is formed by rolling.

[0017] In a second aspect, an embodiment of the utility model further provides a hydraulic torque converter, comprising the split guide wheel.

[0018] The beneficial effects of the utility model are as follows:

[0019] The utility model designs the guide wheel to be divided into a guide wheel inner ring and a guide wheel body, so that the casting process of the guide wheel body can be transformed from gravity casting to high-pressure casting; the guide wheel inner ring is manufactured by a rolling forming process, is positioned by fitting with the geometric shape of the guide wheel outer ring, and is finally fixed by welding.

[0020] The inner ring of the guide wheel of the utility model is designed according to the outer edge of the blade of the guide wheel body, and can be directly fitted and positioned on the outer edge of the blade through the geometric shape after rolling forming, which is simple to manufacture, low in cost, and convenient to assemble due to the shape positioning.

[0021] The blades of the guide wheel body of the utility model are not wrapped by an outer ring, and the casting mold can be arranged with a draft in a circular manner to meet the production requirements of the high-pressure casting process; the surface finish of the blades formed by the high-pressure casting process is good and the dimensional accuracy is high, and the performance consistency of the torque converter product is better maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 is an assembly diagram of a split guide wheel according to one or more embodiments of the utility model;

[0024] Figure 2 is an exploded view of a split guide wheel according to one or more embodiments of the present invention;

[0025] FIG3( a) is a perspective view of a guide wheel body according to one or more embodiments of the present invention;

[0026] FIG3( b ) is a front view of a guide wheel body according to one or more embodiments of the present invention;

[0027] FIG4( a) is a perspective view of the inner ring of the guide wheel according to one or more embodiments of the present invention;

[0028] FIG4( b ) is a side view of the inner ring of the guide wheel according to one or more embodiments of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of a hydraulic torque converter according to one or more embodiments of the present utility model.

[0030] Among them, 1. guide wheel, 2. guide wheel body, 2.1. blades, 2.2. reinforcing ribs, 2.3. internal splines, 3. guide wheel inner ring, 3.1. inner concave surface, 3.2. first flange, 3.3. second flange, 3.4. weld, 4. pump wheel, 5. turbine, 6. casing, 7. cover wheel, 8. elastic plate. DETAILED DESCRIPTION

[0031] Embodiment 1:

[0032] In a typical embodiment of the present invention, Figure 1 and Figure 2 As shown, a split guide wheel is provided.

[0033] Due to the limitation of the current guide wheel structure, the casting process has always adopted the gravity casting process, which has low production efficiency and poor impeller surface finish, resulting in high product production costs and poor performance consistency of the torque converter product; based on this, the present embodiment provides a split guide wheel, in which the integral cast guide wheel is designed as an assembly form of a guide wheel inner ring and a guide wheel body, wherein the guide wheel body structure can be produced by a high-pressure casting process, and the guide wheel inner ring is contoured according to the guide wheel body outer ring, and after rolling forming, it is positioned by geometric shape and finally welded and fixed to the guide wheel body outer ring.

[0034] The above-mentioned split guide wheel will be described in detail below with reference to the accompanying drawings.

[0035] like Figure 1 and Figure 2 As shown, the split guide wheel is a welded assembly of the guide wheel body 2 and the guide wheel inner ring 3. The guide wheel inner ring 3 is positioned and assembled on the outer circle of the guide wheel body 2 by means of geometric shape, and finally assembled into an integrated guide wheel by welding. Since the guide wheel body 2 and the guide wheel inner ring 3 are designed as separate parts, the casting mold can be designed with a demolding mechanism on the circumference of the guide wheel blade 2.1 to meet the requirements of the high-pressure casting process.

[0036] The guide wheel 1 of this embodiment is manufactured by a high-pressure casting process. No casting sand is generated during the production process and it is not restricted by environmental protection policies. The blade 2.1 has good surface finish and high dimensional accuracy, and the torque converter product performance consistency is better maintained. The high material utilization rate and production efficiency can greatly reduce production costs.

[0037] The guide wheel body 2 has blades 2.1, reinforcing ribs 2.2 and internal splines 2.3, and the blades 2.1, reinforcing ribs 2.2 and internal splines 2.3 are arranged in sequence from the outside to the inside.

[0038] Specifically, as shown in Figures 3(a) and 3(b), the guide wheel body 2 has an inner ring and an outer ring arranged concentrically, and the blades 2.1 are arranged on the outer peripheral surface of the outer ring. A plurality of blades 2.1 are distributed in an array along the outer peripheral surface, that is, they are evenly arranged. The blades 2.1 play a guiding role in the movement of the fluid. The blades 2.1 are not wrapped by an outer ring on the outside, and the casting mold is arranged circumferentially for demolding to meet the production requirements of the high-pressure casting process.

[0039] The inner spline 2.3 is located on the inner circumference of the inner ring of the guide wheel body 2, and is used to fix the circumference and axial position of the guide wheel 1. The area between the inner ring and the outer ring is the secondary outer periphery, and a plurality of reinforcing ribs 2.2 are arranged on the secondary outer periphery of the guide wheel body. In this embodiment, the reinforcing ribs 2.2 are evenly distributed, and the number of the reinforcing ribs 2.2 is selected according to actual requirements, for example, six reinforcing ribs 2.2 are arranged; the reinforcing ribs 2.2 are used to design the uniform wall thickness of the guide wheel body 2, so as to prevent casting defects and ensure the overall strength of the guide wheel body 2.

[0040] As shown in FIG. 4( a ) and FIG. 4( b ), the guide wheel inner ring 3 is provided with a first flange 3.2 and a second flange 3.3 to ensure the axial clearance requirements with the torque converter pump wheel and turbine, and to play a positioning role in the rolling forming process.

[0041] In this embodiment, the widths of the first flange 3.1 and the second flange 3.2 are different to meet the error-proofing requirements for the installation of the guide wheel inner ring 3; it should be noted that the width here refers to the axial dimension along the guide wheel inner ring 3.

[0042] The outer peripheral surface of the main part of the guide wheel inner ring 3 is an inner concave surface 3.1, and the inner concave surface 3.1 is connected between the first flange 3.1 and the second flange 3.2. As shown in Figure 4(b), the inner concave surface 3.1 is eccentrically arranged, which can effectively solve the problem that the front and back sides of the installation position of the guide wheel inner ring 3 are difficult to distinguish. Specifically, the longitudinal section of the inner concave surface 3.1 is a curve, which is not an arc line, and the distance between the inner concave surface 3.1 and the center of the guide wheel inner ring 3 gradually changes (decreases or increases) from one end close to the first flange 3.1 or the second flange 3.2 to the other end (the second flange 3.2 or the first flange 3.1).

[0043] The inner concave surface 3.1 is designed according to the outer edge of the blade 2.1 of the guide wheel body 2 to meet the geometric shape positioning requirements during assembly; the inner concave surface of the guide wheel inner ring 3 is designed according to the outer edge of the guide wheel body, and after roll forming, it can be directly fitted and positioned on the outer edge of the guide wheel body blade 2.1 through the geometric shape. The final state is that the inner ring 3 of the guide wheel is welded and fixed to the guide wheel body 2 to form an assembly guide wheel 1.

[0044] The circumferential length of the guide wheel inner ring 3 is determined according to the circumference of the outer edge of the guide wheel body, and the width of the weld 3.4 and the reliable and stable positioning of the guide wheel inner ring 3 after welding must be ensured.

[0045] In this embodiment, the guide wheel body 2 is integrally formed by high-pressure casting, and the guide wheel inner ring 3 is formed by rolling, which ensures that the guide wheel blades 2.1 can adopt a hyperbolic structure, thereby ensuring the high efficiency of the torque converter.

[0046] Embodiment 2:

[0047] This embodiment provides a hydraulic torque converter, such as Figure 5 As shown, the guide wheel 1 is welded together and assembled with the pump wheel 4, the turbine 5, the casing 6, the cover wheel 7, the elastic plate 8, etc., wherein the guide wheel 1 is the split guide wheel described in the first embodiment. Since the guide wheel 1 adopts the cast hyperbolic blades 2.1 and the rolled guide wheel inner ring 3, the torque converter assembly has the advantages of high efficiency and low cost compared with traditional products.

[0048] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A split guide wheel, characterized in that: include: The guide wheel body has a plurality of blades on its outer periphery, a plurality of reinforcing ribs arranged on its sub-outer periphery, and an inner spline on its inner periphery; The inner ring of the guide wheel is assembled on the outer ring of the guide wheel. The outer periphery of the inner ring of the guide wheel is provided with a first flange and a second flange, and the first flange and the second flange are connected by an inner concave surface.

2. A split guide wheel according to claim 1, characterized in that: The first flange and the second flange have different widths.

3. A split guide wheel according to claim 1 or 2, characterized in that: The inner concave surface is eccentrically arranged.

4. A split guide wheel according to claim 1, characterized in that: The inner ring of the guide wheel is in contact with the outer edge of the blade.

5. A split guide wheel according to claim 1 or 4, characterized in that: The guide wheel inner ring and the guide wheel body are welded and fixed.

6. A split guide wheel according to claim 1, characterized in that: The blades are distributed in a circumferential array.

7. A split guide wheel according to claim 1 or 6, characterized in that: The blade is a hyperbolic structure.

8. A split guide wheel according to claim 1, characterized in that: The guide wheel body is integrally formed by high-pressure casting.

9. A split guide wheel according to claim 1 or 8, characterized in that: The inner ring of the guide wheel is formed by rolling.

10. A hydraulic torque converter, characterized in that: It comprises a split guide wheel as described in any one of claims 1-8.

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