Improved steel shaft

Abstract

The utility model discloses an improved steel shaft which comprises a shaft head and a shaft body, a plurality of first grooves and at least one second groove are formed in the outer side wall of the shaft head, the first grooves are all arranged in the axial direction, and the second grooves are arranged in the circumferential direction. According to the technical scheme, the problems that the outer side wall of the shaft head of an existing steel shaft is provided with a reticulate pattern structure, but the reticulate pattern structure is not deep, and after the cross-flow fan blade is subjected to injection molding, plastic cannot flow into the reticulate pattern structure better, so that the steel shaft is prone to loosening are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel shafts, in particular to an improved steel shaft. Background Art

[0002] In the structure of the crossflow fan blade, the steel shaft disc is an important component, which includes an injection molded disc and a steel shaft fixed at the center. In the prior art, the steel shaft includes a shaft head and a shaft body. The outer wall of the shaft head is provided with a mesh structure, but the depth of the mesh structure is not deep. After the crossflow fan blade is injection molded, the plastic cannot flow into the mesh structure better, making the steel shaft easy to loosen, resulting in an increase in the defective rate of the crossflow fan blade product. Utility Model Content

[0003] In view of the above-mentioned defects, the utility model proposes an improved steel shaft, aiming to solve the problem that the outer wall of the shaft head of the existing steel shaft is provided with a mesh structure, but the depth of the mesh structure is not deep. When the cross-flow fan blade is injection molded, the plastic cannot flow better into the mesh structure, making the steel shaft easy to loosen.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] An improved steel shaft comprises a shaft head and a shaft body. The outer side wall of the shaft head is provided with a plurality of first grooves and at least one second groove. The plurality of first grooves are arranged along the axial direction, and the second groove is arranged along the circumferential direction.

[0006] Preferably, a plurality of the first grooves are evenly distributed along the circumferential direction.

[0007] Preferably, a plurality of the first grooves are non-uniformly distributed along the circumferential direction.

[0008] Preferably, the number of the first grooves is 2-10, and the number of the second grooves is 1-3.

[0009] Preferably, the first groove includes a straight portion and a chamfered portion, and the straight portion is flush with a bottom of the chamfered portion.

[0010] Preferably, the width D of the second groove is D≥1 mm.

[0011] Preferably, when one second groove is provided, the second groove is located in the middle of the shaft head.

[0012] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0013] In this solution, by providing an axially designed first groove and a circumferentially designed second groove on the outer wall of the shaft head, it can be better tightly combined with the plastic to achieve a cross-fixing effect, so that the entire steel shaft is not easy to loosen, thereby reducing the defective rate of the cross-flow fan blade product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an improved steel shaft;

[0015] Figure 2 It is a schematic diagram of one embodiment of the present invention.

[0016] Among them, 1, shaft head; 2, shaft body; 11, first groove; 12, second groove; 111, straight portion; 112, chamfered portion; D, width of the second groove. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0018] In the description of the present invention, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc., indicating the orientation or position relationship are based on the orientation or position relationship 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 a limitation on the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is more than two.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "splicing", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] An improved steel shaft comprises a shaft head 1 and a shaft body 2. The outer side wall of the shaft head 1 is provided with a plurality of first grooves 11 and at least one second groove 12. The plurality of first grooves 11 are arranged along the axial direction, and the second grooves 12 are arranged along the circumferential direction.

[0022] An improved steel shaft of this solution, in this embodiment, as Figure 1 As shown, six first grooves 11 are provided, and one second groove 12 is provided. Since the first grooves 11 are all arranged axially, when the cross-flow fan blade is injection molded, the axially designed first groove 11 can better drain the air in the groove, so that the plastic can flow into the groove better, thereby preventing the entire steel shaft from rotating circumferentially. Since the second groove 12 is arranged circumferentially, when the plastic fills the groove, the circumferentially designed second groove 12 can prevent the entire steel shaft from moving radially. In this solution, by arranging the axially designed first groove 11 and the circumferentially designed second groove 12 on the outer side wall of the shaft head 1, it can better combine tightly with the plastic to achieve a cross-fixing effect, so that the entire steel shaft is not easy to loosen, thereby reducing the defective rate of the cross-flow fan blade product.

[0023] Preferably, the plurality of first grooves 11 are evenly distributed along the circumference. Figure 1 As shown, since the plurality of first grooves 11 are evenly distributed along the circumferential direction, when the crossflow blade is injection molded, the evenly distributed first grooves 11 can ensure even injection of glue, making the fixation of the entire steel shaft more stable.

[0024] Preferably, the plurality of first grooves 11 are non-uniformly distributed along the circumference. In one embodiment, since the plurality of first grooves 11 are non-uniformly distributed along the circumference, when the crossflow blade is injection molded, the non-uniformly distributed first grooves 11 can ensure that the plastic and certain specific areas of the steel shaft are more firmly combined during injection molding.

[0025] Preferably, the first grooves 11 are provided with 2-10, and the second grooves 12 are provided with 1-3. Specifically, when the number of the first grooves 11 is less than 2, the effect on fixing the entire steel shaft is not great. When the number of the first grooves 11 is greater than 10, the speed of the glue feeding in each of the first grooves 11 will be slow, and the groove will be prone to lack of material. When the number of the second grooves 12 is in the range of 1-3, it can better ensure that the entire steel shaft will not move radially.

[0026] Preferably, the first groove 11 includes a straight portion 111 and a chamfered portion 112, and the straight portion 111 is flush with the bottom of the chamfered portion 112. Figure 1As shown, the straight portion 111 is the main part of the first groove 11, providing stable support and positioning for the shaft head 1. The setting of the chamfered portion 112 can provide a smooth transition between the end of the straight portion 111 along the axial direction and the outer wall of the shaft head 1, reduce stress concentration, and thus improve the strength of the entire steel shaft. Since the bottom of the straight portion 111 and the chamfered portion 112 are flush, that is, the depths of the two are the same, it can ensure that the overall structure of the first groove 11 is more stable. It is further explained that the depth of the straight portion 111 and the chamfered portion 112, that is, the depth of the first groove 11 will vary according to the diameter of the steel shaft. For example, when the diameter of the steel shaft is 6mm, the depth of the first groove 11 is 1-2mm.

[0027] Preferably, the width D of the second groove 12 is D≥1 mm. Figure 2 As shown, when the width D of the second groove 12 is less than 1 mm, tool collision often occurs when processing the second groove 12, resulting in failure of processing.

[0028] Preferably, when one second groove 12 is provided, the second groove 12 is located in the middle of the shaft head 1. Figure 1 As shown, since the second groove 12 is located in the middle of the shaft head 1, when the plastic fills the groove, it can better cooperate with the first groove 11, so that the entire steel shaft is fixed more stably.

[0029] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. An improved steel shaft, characterized in that: It comprises an axle head and an axle body. The outer side wall of the axle head is provided with a plurality of first grooves and at least one second groove. The plurality of first grooves are arranged along the axial direction, and the second grooves are arranged along the circumferential direction.

2. An improved steel shaft according to claim 1, characterized in that: The plurality of first grooves are evenly distributed along the circumferential direction.

3. An improved steel shaft according to claim 1, characterized in that: The plurality of first grooves are non-uniformly distributed along the circumferential direction.

4. An improved steel shaft according to claim 1, characterized in that: The number of the first grooves is 2-10, and the number of the second grooves is 1-3.

5. An improved steel shaft according to claim 1, characterized in that: The first groove includes a straight portion and a chamfered portion, and the straight portion is flush with a bottom of the chamfered portion.

6. An improved steel shaft according to claim 1, characterized in that: The width D of the second groove is D≥1 mm.

7. An improved steel shaft according to claim 1, characterized in that: When one second groove is provided, the second groove is located in the middle of the shaft head.

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