CN207315890U - A connection structure between a water pump shaft and a motor shaft - Google Patents

Abstract

The utility model provides a connection structure of water pump shaft and motor shaft belongs to mechanical technical field. It has solved current water pump shaft and motor shaft and has been connected the problem firm inadequately and that the structure is comparatively complicated. This connection structure of water pump shaft and motor shaft, including water pump shaft and motor shaft, the outer end of water pump shaft has a power supply motor shaft male location section of thick bamboo, and in the motor shaft inserted a location section of thick bamboo, a location section of thick bamboo all was equipped with the keyway with the motor shaft, and a location section of thick bamboo is equipped with the connecting key with the keyway of motor shaft, and threaded connection has holding screw on the location section of thick bamboo, and holding screw's the inner supports presses on the connecting key. This connection structure of water pump shaft and motor shaft has firm in connection and the comparatively simple advantage of structure.

Description

A connection structure between a water pump shaft and a motor shaft

technical field

The utility model belongs to the technical field of machinery and relates to a connection structure, in particular to a connection structure between a water pump shaft and a motor shaft.

Background technique

In the prior art, the operation of the pump shaft of the water pump is realized by connecting the motor shaft. The working efficiency of the pump shaft based on the water pump is closely related to the power transmission of the motor. Therefore, whether the linkage mechanism connecting the pump shaft of the water pump and the motor shaft is firmly connected Good degree, good concentricity, smooth operation and so on play an important role. The pump shaft of the existing water pump is generally connected with the motor shaft through a conventional shaft coupling.

For example, a coupling for connecting the water pump shaft and the motor shaft disclosed in the Chinese patent literature (application number: 201510034844.2) is mainly composed of two halves of the coupling. A semi-circular groove is provided, wherein a central axial circular arc groove with a semicircular diameter larger than the semicircular diameter of the semicircular groove is arranged in the middle section of the semicircular groove, and after the two half-coupling bodies are connected, a shaft connecting the water pump shaft and the motor shaft is formed in the axial direction. The circular arc slot holes connected together; the upper and lower ends of the two halves of the coupling body and the two sides of the semicircular groove are respectively provided with facing recessed shoulders. The fixed screw holes or through holes on the surface are equipped with bolts or screws that can connect the two halves of the coupling body together and clamp the water pump shaft and the motor shaft together. However, the shaft coupling is used to connect the water pump shaft and the motor shaft, so the connection is not strong enough and the structure is relatively complicated.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problems in the existing technology, and propose a connection structure between the pump shaft and the motor shaft of the water pump with firm connection and relatively simple structure.

The purpose of this utility model can be achieved through the following technical proposals: a connection structure between a water pump shaft and a motor shaft, including a water pump shaft and a motor shaft, characterized in that the outer end of the water pump shaft has a The motor shaft is inserted into the positioning cylinder, the motor shaft is inserted into the positioning cylinder, the positioning cylinder and the motor shaft are provided with key grooves, the positioning cylinder and the motor shaft The keyway is provided with a connection key, and a set screw is threadedly connected to the positioning cylinder, and the inner end of the set screw presses against the connection key.

When connecting, put the connecting key into the keyway, then insert the motor shaft directly into the positioning cylinder of the pump shaft, and screw the set screw so that the inner end of the set screw presses against the connecting key to realize the water pump. The fixed connection between the shaft and the motor shaft has the advantages of firm connection, simple structure and convenient disassembly and assembly.

In the above connection structure between the pump shaft and the motor shaft of the water pump, a tapered groove is provided on the outer wall of the connecting key, and the inner end of the set screw is embedded in the tapered groove. The inner end of the set screw is embedded in the tapered groove of the connecting key, which has better positioning effect and avoids loosening.

In the above-mentioned connection structure between the pump shaft and the motor shaft of the water pump, 1 to 4 set screws are threaded on the outer wall of the positioning cylinder, and 1 to 4 conical screws are provided on the connecting key. The grooves and the set screws are provided in one-to-one correspondence with the set screws.

In the above connection structure between the pump shaft and the motor shaft of the water pump, the inner end surface of the positioning cylinder is a limiting surface, and the outer end surface of the motor shaft abuts against the limiting surface. The outer end surface of the motor shaft abuts against the limiting surface, which has a good axial limiting effect on the motor shaft and makes the connection more firm.

In the above-mentioned connection structure between the pump shaft and the motor shaft of the water pump, a through hole is provided on the side wall of the positioning cylinder, and the through hole communicates with the keyway of the positioning cylinder and the through hole The hole is close to the limiting surface. By arranging the above-mentioned through hole, it is convenient to remove chips when processing the keyway of the positioning hole, and at the same time, it is convenient to observe whether the outer end of the motor shaft is against the limit surface, which has the advantage of being more convenient to use.

In the above-mentioned connection structure between the pump shaft of the water pump and the motor shaft, the number of said through holes is two, and they are arranged symmetrically around the axis of the positioning cylinder. The number of through holes is two and arranged symmetrically, so that the rotation of the pump shaft of the water pump has better dynamic balance.

In the above connection structure between the pump shaft and the motor shaft of the water pump, the connection key is a flat key.

Compared with the prior art, the connection structure between the pump shaft and the motor shaft of the water pump has the following advantages:

1. By screwing in the set screw so that the inner end of the set screw presses against the connecting key, the fixed connection between the pump shaft and the motor shaft is realized, which has the advantages of firm connection, simple structure and convenient disassembly;

2. There is a tapered groove on the outer wall of the connecting key, and the inner end of the set screw is embedded in the tapered groove, which has a good positioning effect and avoids loosening;

3. The outer end surface of the motor shaft abuts against the limiting surface, which has a good axial limiting effect on the motor shaft and makes the connection more firm;

4. There are two through holes and they are arranged symmetrically with the axis of the positioning cylinder as the center, so that the rotation of the pump shaft of the water pump has a better dynamic balance.

Description of drawings

Fig. 1 is a schematic diagram of the connection structure between the pump shaft and the motor shaft of the present water pump.

FIG. 2 is a schematic cross-sectional view of FIG. 1 .

In the figure, 1. Water pump shaft; 1a, positioning cylinder; 1b, limit surface; 1c, through hole; 2, motor shaft; 3, keyway; 4, connecting key; 4a, tapered groove; 5, set screw .

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figures 1 and 2, a connection structure between a water pump shaft and a motor shaft includes a water pump shaft 1 and a motor shaft 2. The outer end of the water pump shaft 1 has a positioning cylinder 1a into which the power supply shaft 2 is inserted, and the motor shaft 2 is inserted into the positioning cylinder 1a, the positioning cylinder 1a and the motor shaft 2 are provided with corresponding key grooves 3, the positioning cylinder 1a and the key groove 3 of the motor shaft 2 are provided with a connecting key 4, and the connecting key 4 is a flat key. There are two set screws 5 threaded on the positioning cylinder 1a, two tapered grooves 4a are provided on the connecting key 4 and the set screws 5 correspond to the set screws 5 one by one, and the inner ends of the set screws 5 are pressed On the tapered groove 4a corresponding to the connecting key 4, it has a better positioning effect and avoids loosening.

As another solution, 1 or 4 set screws 5 are screwed on the outer wall of the positioning cylinder 1a, and the connecting key 4 is provided with 1 or 3 tapered grooves 4a and the set screws 5 and the set screws 5 are one One to one corresponding setting.

The inner end surface of the cylinder is defined as the limit surface 1b, and the outer end surface of the motor shaft 2 is against the limit surface 1b, which has a better axial limit effect on the motor shaft 2 and makes the connection more firm. Two through holes 1c are arranged on the side wall of the positioning cylinder 1a, and the two through holes 1c are arranged symmetrically with the axis of the positioning cylinder 1a as the center. Plane 1b.

When connecting, put the connecting key 4 into the keyway 3, then insert the motor shaft 2 directly into the positioning cylinder 1a of the pump shaft 1, and make the outer end surface of the motor shaft 2 abut against the limit surface 1b On the top, by screwing in the set screw 5, the inner end of the set screw 5 is pressed against the tapered groove 4a of the connecting key 4, so as to realize the fixed connection between the pump shaft 1 and the motor shaft 2, which has a firm connection and a strong structure. Simple and convenient disassembly and assembly. By setting the above-mentioned through hole 1c, it is convenient to remove chips when processing the keyway 3 of the positioning hole, and it is convenient to observe whether the outer end of the motor shaft 2 is against the limit surface 1b, which has the advantage of being more convenient to use.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this article uses many terms such as pump shaft 1, positioning cylinder 1a, limit surface 1b, through hole 1c, motor shaft 2, keyway 3, connecting key 4, tapered groove 4a, set screw 5, etc., it does not The possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (7)

1. the connection structure of a kind of Pump Axle and motor shaft, including Pump Axle (1) and motor shaft (2), it is characterised in that The outer end of the Pump Axle (1) has the positioning tube (1a) being inserted into for the motor shaft (2), the motor shaft (2) It is inserted into the positioning tube (1a), the positioning tube (1a) is equipped with keyway (3) with the motor shaft (2), described Positioning tube (1a) and the keyway (3) of the motor shaft (2) be equipped with connecting key (4), screw thread company on the positioning tube (1a) Holding screw (5) is connected to, the inner of the holding screw (5) is pressed on the connecting key (4).

2. the connection structure of a kind of Pump Axle according to claim 1 and motor shaft, it is characterised in that the connection The lateral wall of key (4) is equipped with cone tank (4a), and the inner of the holding screw (5) is on the cone tank (4a).

3. the connection structure of a kind of Pump Axle according to claim 2 and motor shaft, it is characterised in that the positioning 1 to 4 holding screw (5) is threaded with the lateral wall of cylinder (1a), the connecting key (4) is equipped with 1 to 4 cone tank (4a) and the holding screw (5) are corresponded with the holding screw (5) and set.

4. the connection structure of a kind of Pump Axle and motor shaft according to claim 1 or 2 or 3, it is characterised in that described The inner face of positioning tube be confined planes (1b), the outer end face of the motor shaft (2) is resisted against on the confined planes (1b).

5. the connection structure of a kind of Pump Axle according to claim 4 and motor shaft, it is characterised in that the positioning The side wall of cylinder (1a) is equipped with through hole (1c), the through hole (1c) be connected with the keyway (3) of the positioning tube (1a) and The through hole (1c) is close to the confined planes (1b).

6. the connection structure of a kind of Pump Axle according to claim 5 and motor shaft, it is characterised in that the through hole The quantity of (1c) is symmetrical arranged for two and centered on the axis of the positioning tube (1a).

7. the connection structure of a kind of Pump Axle and motor shaft according to claim 1 or 2 or 3, it is characterised in that described Connecting key (4) be flat key.