Water pump shaft of automobile cooling circulating pump

Abstract

The utility model provides a water pump shaft of an automobile cooling circulating pump, which comprises a shaft body and a driving tooth piece detachably mounted on the shaft body, the shaft body comprises a main body part, one end of the main body part is provided with a positioning part, and the other end of the main body part is provided with a driving part; the diameter of the positioning part is smaller than that of the main body part, a positioning shaft shoulder is formed between the positioning part and the main body part, a limiting shaft shoulder is arranged between the driving part and the main body part, a thread section is arranged at the free end of the driving part, and a key groove is formed in the driving part; the driving tooth piece is arranged on the driving part in a sleeving mode, the driving tooth piece and the driving part are connected through a key in the key groove and are axially fixed through a locking nut on the threaded section, the outer diameter of the limiting shaft shoulder is smaller than that of the driving tooth piece, and the outer diameter of the threaded section is smaller than that of the driving part. The driving tooth piece is detachably installed on the shaft body, the water pump shaft is convenient to assemble, and the driving tooth piece is easy to replace. When the driving tooth piece is damaged, the driving tooth piece can be directly replaced, the maintenance is convenient, and the use cost is low.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive parts, and particularly relates to a water pump shaft of a cooling circulation pump. Background Art

[0002] The automotive cooling circulation pump, also known as the water pump, is a key component in the automotive cooling system and is mainly responsible for regulating the engine temperature by circulating the coolant. The composition of the automotive water pump includes multiple components. Among them, the water pump shaft is one of the core parts of the water pump and is directly involved in the coolant circulation process. The function of the water pump shaft is to pump the coolant through rotational motion, which is achieved by being driven by the engine belt. The design and material of the water pump shaft are crucial for the efficiency and durability of the water pump because it directly affects the flow rate and direction of the coolant. The design and manufacturing quality of the water pump shaft directly affect the performance and lifespan of the water pump. The tooth structure part of the water pump shaft belongs to the vulnerable part. In the prior art, after the tooth structure of the water pump shaft is damaged, the entire water pump shaft can only be replaced, resulting in material waste and 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 water pump shaft of an automotive cooling circulation pump.

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

[0005] A water pump shaft of an automotive cooling circulation pump includes a shaft body and a driving tooth part detachably installed on the shaft body. The shaft body includes a main body part. One end of the main body part is provided with a positioning part, and the other end is provided with a driving part. The diameter of the positioning part is smaller than that of the main body part, and a positioning shoulder is formed between the positioning part and the main body part. A limiting shoulder is provided between the driving part and the main body part, and a threaded section is provided at the free end of the driving part. A keyway is provided on the driving part. The driving tooth part is sleeved on the driving part, and the driving tooth part is connected to the driving part through a key in the keyway and is axially fixed by a locking nut on the threaded section. The outer diameter of the limiting shoulder is smaller than the outer diameter of the driving tooth part, and the outer diameter of the threaded section is smaller than the outer diameter of the driving part. A groove is provided on the outer end face of the driving tooth part. The distance from the bottom surface of the groove to the limiting shoulder is greater than the length of the driving part. The inner diameter of the groove is greater than the diameter of the driving part. The locking nut abuts against the bottom surface of the groove, and the locking nut is sunk into the groove, and the threaded section does not protrude from the outer end face of the driving tooth part.

[0006] Further, a chamfer is provided on the side of the limiting shoulder facing the positioning part.

[0007] Further, the length of the driving part is greater than the length of the positioning part, and the length of the driving part is smaller than the length of the main body part.

[0008] Further, a tool withdrawal groove is provided at the junction of the driving part and the limiting shoulder.

[0009] Further, a tool withdrawal groove is provided at the connection between the main body portion and the limiting shoulder.

[0010] Further, a plurality of tooth structures are provided on the outer circumferential surface of the driving tooth member.

[0011] Further, the locking nut includes a pressing portion with an outer diameter larger than that of the driving portion, and an operating portion is provided at one end of the pressing portion away from the driving portion.

[0012] Further, the operating portion adopts an external hexagonal structure.

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

[0014] In the present invention, the driving tooth member is detachably mounted on the shaft body, the assembly of the water pump shaft is convenient, and the driving tooth member is easy to replace. When the driving tooth member is damaged, the driving tooth member can be directly replaced, the maintenance is convenient, and the use cost is low. 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 present invention after removing the driving tooth member;

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

[0019] Figure 4 is a schematic diagram of the matching part of the driving tooth member and the shaft body in the present invention;

[0020] Figure 5 is Figure 4 a schematic diagram after removing the locking nut in

[0021] Figure 6 is a schematic diagram of the locking nut 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. It 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. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, 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 defined and limited, the terms "mounted", "connected", and "coupled" 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] An automobile cooling circulation pump water pump shaft, as Figures 1 to 6 shown, includes a shaft body 1 and a driving gear member 2 detachably mounted on the shaft body. The shaft body includes a main body portion 3. One end of the main body portion is provided with a positioning portion 4, and the other end is provided with a driving portion 5. The diameter of the positioning portion is smaller than that of the main body portion, and a positioning shoulder 6 is formed between the positioning portion and the main body portion. A limiting shoulder 7 is provided between the driving portion and the main body portion, and a threaded section 8 is provided at the free end of the driving portion. A keyway 9 is provided on the driving portion. The driving gear member is sleeved on the driving portion, and the driving gear member and the driving portion are connected by a key 10 in the keyway to achieve circumferential fixation, and are axially fixed by a locking nut 11 on the threaded section. In the present invention, the driving gear member is detachably mounted on the shaft body, which is convenient for assembly and replacement.

[0027] The present invention adopts a combined water pump shaft structure. Since the driving gear member and the shaft body member are connected by a key, the key is used to transmit the acting force between the two, and the locking nut only plays a role in axially fixing the driving gear member and will not bear the reaction force during the rotation of the driving gear member.

[0028] The outer diameter of the limiting shoulder is smaller than the outer diameter of the driving tooth part, the outer diameter of the threaded section is smaller than the outer diameter of the driving part, and a groove 12 is provided on the outer end face of the driving tooth part. ， When the driving tooth part is installed in place, the distance from the bottom surface 13 of the groove to the limiting shoulder is greater than the length of the driving part. It should be noted that after the driving tooth part is installed in place, the distance from the bottom surface of the groove to the limiting shoulder is the length of the mating section 18 of the inner cavity of the driving tooth part. The inner diameter of the groove is greater than the diameter of the driving part. The locking nut abuts against the bottom surface of the groove, and the locking nut is recessed into the groove, and the threaded section does not protrude from the outer end face of the driving tooth part.

[0029] A chamfer 14 is provided on one side of the limiting shoulder facing the positioning part. The length of the driving part is greater than the length of the positioning part, and the length of the driving part is less than the length of the main body part. A relief groove 15 is provided at the junction of the driving part and the limiting shoulder, and at the junction of the main body part and the limiting shoulder. A plurality of tooth structures are provided on the outer circumferential surface of the driving tooth part. The locking nut includes a pressing part 16 with an outer diameter greater than that of the driving part, and an operating part 17 is provided at one end of the pressing part away from the driving part. By way of example, the operating part adopts an external hexagonal structure.

[0030] In the present invention, the driving tooth part is detachably installed on the shaft body, the overall assembly of the water pump shaft is convenient, and the driving tooth part is easy to replace. When the driving tooth part is damaged, the driving tooth part can be directly replaced, which is convenient for maintenance and reduces the use cost.

[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 principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water pump shaft for an automobile cooling circulation pump, characterized in that: The invention comprises a shaft body and a driving toothed part which can be detachably mounted on the shaft body, wherein the shaft body comprises a main body, a positioning part is provided at one end of the main body, and a driving part is provided at the other end; the diameter of the positioning part is smaller than that of the main body, a positioning shoulder is formed between the positioning part and the main body, a limiting shoulder is provided between the driving part and the main body, a threaded section is provided at the free end of the driving part, and a keyway is provided on the driving part; the driving toothed part is sleeved on the driving part, and the driving toothed part and the driving part are connected by a key in the keyway, and are axially fixed by a locking nut on the threaded section, the outer diameter of the limiting shoulder is smaller than the outer diameter of the driving toothed part, the outer diameter of the threaded section is smaller than the outer diameter of the driving part, a groove is provided on the outer end surface of the driving toothed part, and the distance between the bottom surface of the groove and the limiting shoulder is greater than the length of the driving part; the inner diameter of the groove is greater than the diameter of the driving part, the locking nut is against the bottom surface of the groove, and the locking nut is immersed in the groove, and the threaded section does not protrude from the outer end surface of the driving toothed part.

2. The water pump shaft of an automobile cooling circulation pump according to claim 1, characterized in that: A chamfer is arranged on one side of the limiting shoulder facing the positioning portion.

3. The water pump shaft of an automobile cooling circulation pump according to claim 1, characterized in that: The length of the driving portion is greater than the length of the positioning portion, and the length of the driving portion is less than the length of the main body portion.

4. The water pump shaft of an automobile cooling circulation pump according to claim 1, characterized in that: A tool withdrawal groove is reserved at the connection between the driving part and the limiting shaft shoulder.

5. The water pump shaft of an automobile cooling circulation pump according to claim 1, characterized in that: A cutter withdrawal groove is reserved at the joint between the main body and the limiting shaft shoulder.

6. The water pump shaft of an automobile cooling circulation pump according to claim 1, characterized in that: A plurality of tooth structures are arranged on the outer circumferential surface of the driving toothed member.

7. The water pump shaft of an automobile cooling circulation pump according to claim 1, characterized in that: The locking nut comprises a clamping portion whose outer diameter is larger than that of the driving portion, and an operating portion is arranged at one end of the clamping portion away from the driving portion.

8. The water pump shaft of an automobile cooling circulation pump according to claim 7, characterized in that: The operating portion adopts an external hexagonal structure.

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