High-stability combined gear shaft

Abstract

The high-stability combined gear shaft comprises a gear piece, a front shaft piece and a rear shaft piece, a front concave table and a rear concave table are arranged at the two ends of an inner hole of the gear piece respectively, and a key groove part is arranged on the inner wall of a main hole section; the front shaft piece comprises a front shaft body section and a front matching section, and the rear shaft piece comprises a rear shaft body section; the front matching section is inserted into an inner hole of the tooth piece, and the tail end of the front matching section extends into an inner hole of the rear shaft piece and is locked by a connecting piece; the diameter of the front shaft body section is larger than that of the front matching section, a limiting step is formed at the joint of the front shaft body section and the front matching section, and the front shaft body section sinks into the front concave table; one end of the rear shaft piece is inserted into the rear concave table, the other end of the rear shaft piece is provided with a cavity for containing the connecting piece, and an inner hole of the rear shaft piece is provided with a groove part; a key tooth part is arranged on the outer wall of the front matching section and matched with the key groove part of the tooth piece and the groove part of the rear shaft piece at the same time. The structure stability is good, when one part is damaged, the damaged part can be directly replaced, the other two parts can be recycled, and the use cost is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of transmission parts, and particularly relates to a high-stability combined tooth shaft. Background Art

[0002] A tooth shaft, also known as a gear shaft, is generally in the shape of a metal round rod. It is a mechanical part that supports rotating parts and rotates synchronously with them to transmit motion, torque, or bending moment. Different diameters can be provided for each section of the shaft. Most common gear shafts are of an integrally formed structure. An automotive cooling circulation pump, also known as a water pump, includes multiple components. Among them, the function of the water pump shaft is to pump coolant through rotational motion, and it is one of the core parts of the water pump. Its design and manufacturing quality directly affect the performance and lifespan of the water pump. The tooth structure part of the water pump shaft is a vulnerable part. In the prior art, the gear and the shaft of the water pump shaft are mostly of an integrally formed structure. When the tooth structure of the water pump shaft is damaged, only the entire water pump shaft can be replaced, resulting in material waste and relatively high usage costs. Therefore, it is necessary to improve the structure of the water pump shaft. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a high-stability combined tooth shaft.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] A high-stability combined tooth shaft includes a tooth part, a front shaft part, and a rear shaft part. At both ends of the inner hole of the tooth part, a front concave platform and a rear concave platform are respectively provided, and a keyway part is provided on the inner wall of the main hole section; the front shaft part includes a front shaft body section and a front fitting section, and the rear shaft part includes a rear shaft body section; the front fitting section is inserted into the inner hole of the tooth part, and its end extends into the inner hole of the rear shaft part and is locked by a connecting piece on the rear shaft part, so that the front shaft part, the tooth part, and the rear shaft part are fixed together; the diameter of the front shaft body section is larger than that of the front fitting section, and a limiting step is formed at the connection between the two. The front shaft body section is immersed in the front concave platform, and the limiting step abuts against the bottom surface of the front concave platform; one end of the rear shaft part is inserted into the rear concave platform, the other end is provided with a cavity for accommodating the connecting piece, and a groove part is provided in the inner hole of the rear shaft part; the outer wall of the front fitting section is provided with a key tooth part, and this key tooth part cooperates with the keyway part of the tooth part and the groove part of the rear shaft part at the same time to form circumferential positioning, preventing relative rotation between the tooth part, the front shaft part, and the rear shaft part.

[0006] Further, a limiting part is provided between the cavity and the inner hole of the rear shaft part, and the connecting piece abuts against this limiting part.

[0007] Further, a connecting section is provided at the end of the front fitting section, and the diameter of this connecting section is smaller than that of the front fitting section. The end of the connecting section extends outwards beyond the limiting part.

[0008] Further, an external thread structure is provided on the connecting section, and the connecting piece adopts a nut, and this nut is screwed onto the connecting section.

[0009] Further, there are two keyway portions symmetrically provided on the inner wall of the main hole section.

[0010] Further, there are groove portions symmetrically provided in the inner hole of the rear shaft member.

[0011] Further, the front shaft body section is in sliding fit with the side wall of the front concave platform.

[0012] Further, the rear shaft body section is in sliding fit with the side wall of the rear concave platform.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The present invention is reasonably designed in structure. The toothed shaft is composed of three components: the front shaft member, the toothed member, and the rear shaft member. The key tooth portion of the front shaft member forms a mating relationship with the toothed member and the rear shaft member at the same time, and positioning is formed between the toothed member and the front shaft member, and between the toothed member and the rear shaft member, which can prevent the toothed shaft from deforming in the radial direction, with good structural stability and stable service performance. When a certain component is damaged, the damaged component can be directly replaced, and the remaining two components can be recycled, saving costs and avoiding material waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic diagram of the front shaft member in the present invention;

[0018] Figure 3 is a schematic diagram of the toothed member in the present invention;

[0019] Figure 4 is a schematic diagram of the rear shaft member in the present invention;

[0020] Figure 5 is a three-dimensional structural diagram of the present invention;

[0021] Figure 6 is a three-dimensional structural diagram of the toothed member in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation on the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" 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 mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0025] The present invention will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0026] A highly stable combined gear shaft, as Figures 1 to 6 shown, includes a gear member 1, a front shaft member 2, and a rear shaft member 3. At both ends of the inner hole 4 of the gear member, a front concave platform 5 and a rear concave platform 6 are respectively provided, and a keyway portion 7 is provided on the inner wall of the main hole section; the front shaft member includes a front shaft body section 8 and a front mating section 9, and the rear shaft member includes a rear shaft body section 10; the front mating section is inserted into the inner hole of the gear member, and its end extends into the inner hole 12 of the rear shaft member and is locked by a connecting member 13 on the rear shaft member, so that the front shaft member, the gear member, and the rear shaft member are fixed together.

[0027] The diameter of the front shaft body section is larger than that of the front mating section, and a limiting step 14 is formed at the junction of the two. The front shaft body section is immersed in the front concave platform, and the limiting step abuts against the bottom surface 15 of the front concave platform; one end of the rear shaft member is inserted into the rear concave platform, and the other end is provided with a cavity 16 for accommodating the connecting member, and a groove portion 17 is provided on the side wall of the inner hole of the rear shaft member; a key tooth portion 18 is provided on the outer wall of the front mating section, and the key tooth portion cooperates with the keyway portion of the gear member and the groove portion of the rear shaft member at the same time to form circumferential positioning, so as to prevent the gear member, the front shaft member, and the rear shaft member from rotating relative to each other.

[0028] Generally, there are two keyway parts symmetrically arranged on the inner wall of the main hole section. Correspondingly, there are also two key tooth parts symmetrically arranged on the front shaft part. There are two groove parts symmetrically arranged in the inner hole of the rear shaft part, and the groove part of the rear shaft part corresponds to the keyway part of the tooth part, ensuring that the key tooth part of the front shaft part can form positioning with the shaft part and the rear shaft part at the same time. In addition, the front shaft body section is in sliding fit with the side wall of the front concave platform, and the rear shaft body section is in sliding fit with the side wall of the rear concave platform. The front shaft part and the rear shaft part simultaneously form positioning for the tooth part, which can prevent the tooth shaft from deforming in the radial direction and has good structural stability.

[0029] There is a limiting part 19 between the cavity and the inner hole of the rear shaft part, and the connecting part abuts against the outer surface of this limiting part. The end of the front fitting section is provided with a connecting section 11, the diameter of this connecting section is smaller than that of the front fitting section, the limiting part is provided with an inner hole, the connecting section passes through the inner hole 20 of the limiting part and extends outwards from the limiting part, and the connecting part is screwed on the part of the connecting section extending outwards from the limiting part at the end. It should be noted that since the limiting step of the front shaft part has formed axial limitation with the bottom surface of the front concave and convex, the step formed between the connecting section and the front fitting section does not need to contact the limiting part, that is, there is no need for the step between the connecting section and the front fitting section to be limited with the limiting part. As an example, the connecting section is provided with an external thread structure, and the connecting part adopts a nut, and this nut is screwed on the connecting section.

[0030] The structure design of the present invention is reasonable. The tooth shaft is composed of three components: the front shaft part, the tooth part, and the rear shaft part. The key tooth part of the front shaft part forms a cooperation relationship with the tooth part and the rear shaft part at the same time, and positioning is formed between the tooth part and the front shaft part, and between the tooth part and the rear shaft part, which can prevent the tooth shaft from deforming in the radial direction, has good structural stability, and stable service performance. When a certain component is damaged, the damaged component can be directly replaced, and the other two components can be recycled and reused again, with low use cost, energy conservation and environmental protection.

[0031] The above are only the 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 principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A highly stable combined gear shaft, characterized in that: It includes a toothed part, a front shaft part and a rear shaft part. At both ends of the inner hole of the toothed part, there are respectively a front concave platform and a rear concave platform, and a keyway part is provided on the inner wall of the main hole section; the front shaft part includes a front shaft body section and a front fitting section, and the rear shaft part includes a rear shaft body section; the front fitting section is inserted into the inner hole of the toothed part, and its end extends into the inner hole of the rear shaft part and is locked by a connecting piece on the rear shaft part; the diameter of the front shaft body section is larger than that of the front fitting section, and a limiting step is formed at the connection between the two. The front shaft body section is immersed in the front concave platform, and the limiting step abuts against the bottom surface of the front concave platform; one end of the rear shaft part is inserted into the rear concave platform, and the other end is provided with a cavity for accommodating the connecting piece, and a groove part is provided in the inner hole of the rear shaft part; the outer wall of the front fitting section is provided with a key tooth part, and this key tooth part cooperates with the keyway part of the toothed part and the groove part of the rear shaft part at the same time.

2. The high-stability combined gear shaft according to claim 1, characterized in that: A limiting part is provided between the cavity and the inner hole of the rear shaft part, and the connecting piece abuts against this limiting part.

3. A highly stable combined tooth shaft according to claim 2, characterized in that: The end of the front fitting section is provided with a connecting section, the diameter of this connecting section is smaller than that of the front fitting section, and the end of the connecting section extends outwards beyond the limiting part.

4. A highly stable combined gear shaft according to claim 3, characterized in that: An external thread structure is provided on the connecting section, and the connecting piece adopts a nut, and this nut is screwed onto the connecting section.

5. A highly stable combined gear shaft according to claim 1, characterized in that: Two keyway parts are symmetrically provided on the inner wall of the main hole section.

6. A highly stable combined gear shaft according to claim 1, characterized in that: Groove parts are symmetrically provided in the inner hole of the rear shaft part.

7. A highly stable combined gear shaft according to claim 1, characterized in that: The front shaft body section is in sliding fit with the side wall of the front concave platform.

8. A highly stable combined gear shaft according to claim 1, characterized in that: The rear shaft body section is in sliding fit with the side wall of the rear concave platform.

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