CN214499545U

CN214499545U - Impeller locking structure

Info

Publication number: CN214499545U
Application number: CN202120595055.7U
Authority: CN
Inventors: 颜土富; 刘江; 应荣军; 陈卡; 何洪娟; 严哲
Original assignee: Leo Group Zhejiang Pump Co Ltd
Current assignee: Leo Group Zhejiang Pump Co Ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-10-26
Anticipated expiration: 2031-03-24

Abstract

The utility model belongs to the technical field of the water pump, refer in particular to an impeller locking structure, establish at the epaxial impeller of transmission including transmission shaft and cover, the transmission shaft includes screw thread shaft section and conical surface shaft section, be equipped with on the impeller with the screw hole of screw thread shaft section looks adaptation and with the conical hole of conical surface shaft section looks adaptation, the transmission shaft tip is equipped with the fastener of locking impeller. The utility model discloses all there is not keyway structure on impeller and the transmission shaft, and part intensity is good, difficult fracture.

Description

Impeller locking structure

The technical field is as follows:

the utility model belongs to the technical field of the water pump, refer in particular to an impeller locking structure.

Background art:

the prior water pump impeller and a transmission shaft are usually connected through keys, and the keys have the following defects: 1. key grooves are required to be machined on the impeller and the transmission shaft and used for installing keys, and the key grooves damage the strength of parts, so that the shaft diameter of the transmission shaft and the wall thickness of an inner hole of the impeller are increased, and the weight of the parts is increased; 2. stress concentration and cracking phenomena easily occur on the right-angle side of the key groove.

The invention content is as follows:

the utility model aims at providing an impeller locking structure, all do not have the keyway structure on its impeller and the transmission shaft, part intensity is good, difficult fracture.

The utility model discloses a realize like this:

the utility model provides an impeller locking structure, includes that transmission shaft and cover establish the epaxial impeller of transmission, the transmission shaft includes screw thread shaft section and conical surface shaft section, be equipped with on the impeller with screw thread shaft section looks adaptation screw hole and with the conical surface shaft section adaptation taper hole, transmission shaft tip is equipped with the fastener of locking impeller.

In the above-mentioned impeller locking structure, the screwing direction of the threaded shaft section is opposite to the rotation direction of the transmission shaft during operation.

In the above-mentioned impeller locking structure, the fastening member is a nut, and the nut is screwed to the end of the transmission shaft and presses the impeller.

In the above-mentioned impeller locking structure, a flat washer and a spring washer are sleeved on the transmission shaft between the impeller and the nut.

In the above-mentioned impeller locking structure, the fastening member is a bolt, and the bolt is screwed to the end of the transmission shaft and presses the impeller.

In the above-mentioned impeller locking structure, a washer is sleeved on the bolt between the impeller and the bolt head.

In the above impeller locking structure, the transmission shaft is provided with the threaded shaft section and the conical surface shaft section from the end part inwards in sequence.

Compared with the prior art, the utility model outstanding advantage is:

1. the impeller and the transmission shaft of the utility model are both provided with no key groove structure, the part has good strength, is not easy to crack, has simple structure, can finish turning by one-time clamping, has simple process and low cost;

2. the transmission shaft of the utility model is screwed into the impeller to lead the conical surface shaft section to be closely attached to the conical hole, the conical surface is matched to lead the impeller to be accurately positioned, the installation is convenient, and the problem of difficult installation due to over-tightness can not occur;

3. the screwing direction of the threaded shaft section of the utility model is opposite to the rotating direction of the transmission shaft when in work, the matching between the impeller and the transmission shaft can be more compact and can not loosen due to the thread side effect between the impeller and the transmission shaft when receiving normal working load, and the anti-loosening effect is good;

4. the end part of the transmission shaft of the utility model is provided with the fastener for locking the impeller, so that the impeller is locked and the reverse load influence can be resisted;

5. the utility model discloses conical surface auto-lock static friction power and screw thread pair combine the transmission moment of torsion, make the moment of torsion transmission more reliable.

Description of the drawings:

fig. 1 is a cross-sectional view of a first embodiment of the present invention;

fig. 2 is a schematic structural view of a transmission shaft according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of the impeller of the present invention;

fig. 4 is a sectional view of a second embodiment of the present invention;

fig. 5 is a schematic structural view of a secondary transmission shaft according to an embodiment of the present invention;

reference numerals: 1. a drive shaft; 11. a threaded shaft section; 12. a conical surface shaft section; 2. an impeller; 21. a threaded hole; 22. a conical bore; 3. a nut; 4. a flat washer; 5. a spring washer; 6. and (4) bolts.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 1 to 5:

the first embodiment is as follows:

the impeller locking structure comprises a transmission shaft 1 and an impeller 2 sleeved on the transmission shaft 1, wherein the transmission shaft 1 comprises a threaded shaft section 11 and a conical surface shaft section 12, the impeller 2 is provided with a threaded hole 21 matched with the threaded shaft section 11 and a conical hole 22 matched with the conical surface shaft section 12, and a fastener for locking the impeller 2 is arranged at the end part of the transmission shaft 1. As shown in fig. 1-3, the impeller 2 and the transmission shaft 1 of the utility model have no key groove structure, the strength of the parts is good, the parts are not easy to crack, the structure of the parts is simple, the turning can be completed by one-time clamping, the process is simple, and the cost is low; the transmission shaft 1 is screwed into the impeller 2 to enable the conical surface shaft section 12 to be tightly attached to the conical hole 22, the impeller 2 is accurately positioned due to conical surface matching, the installation is convenient, and the problem of over-tightness and difficulty in installation is avoided; the end part of the transmission shaft 1 is provided with a fastener for locking the impeller 2, so that the impeller 2 is locked and can resist the influence of reverse load; the conical surface self-locking static friction force and the thread pair transmit torque, so that the torque transmission is more reliable.

In order to prevent the reverse force of the impeller 2 from loosening the threaded shaft section 11 and the threaded hole 21 when the transmission shaft 1 starts, the screwing direction of the threaded shaft section 11 is opposite to the rotating direction of the transmission shaft 1 during working, the impeller 2 and the transmission shaft 1 are matched more tightly and cannot loosen due to the thread side effect between the impeller 2 and the transmission shaft 1 when normal working load is applied, and the anti-loosening effect is good.

As shown in fig. 1, fasteners and fastener installation: the fastener is a nut 3, and the nut 3 is screwed on the end part of the transmission shaft 1 and compresses the impeller 2.

For better fastening effect: a flat washer 4 and a spring washer 5 are sleeved on the transmission shaft 1 between the impeller 2 and the nut 3.

Furthermore, the transmission shaft 1 is provided with the threaded shaft section 11 and the conical surface shaft section 12 in sequence from the end part to the inside.

Example two:

the structure of this embodiment is substantially the same as that of the first embodiment, and the main difference is that: as shown in fig. 4 and 5, the fastening member is a bolt 6, and the bolt 6 is screwed on the end of the transmission shaft 1 and presses the impeller 2.

For better fastening effect: and a washer is sleeved on the bolt 6 between the impeller 2 and the head of the bolt 6.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an impeller locking structure, includes transmission shaft (1) and establishes impeller (2) on transmission shaft (1) with the cover, its characterized in that: the transmission shaft (1) comprises a threaded shaft section (11) and a conical surface shaft section (12), a threaded hole (21) matched with the threaded shaft section (11) and a conical hole (22) matched with the conical surface shaft section (12) are formed in the impeller (2), and a fastener for locking the impeller (2) is arranged at the end of the transmission shaft (1).

2. An impeller locking structure according to claim 1, wherein: the screwing direction of the threaded shaft section (11) is opposite to the rotating direction of the transmission shaft (1) during working.

3. An impeller locking structure according to claim 1, wherein: the fastener is a nut (3), and the nut (3) is screwed on the end part of the transmission shaft (1) and compresses the impeller (2).

4. An impeller locking structure according to claim 3, wherein: a flat washer (4) and a spring washer (5) are sleeved on the transmission shaft (1) between the impeller (2) and the nut (3).

5. An impeller locking structure according to claim 1, wherein: the fastener is a bolt (6), and the bolt (6) is screwed at the end part of the transmission shaft (1) and compresses the impeller (2).

6. An impeller locking structure according to claim 5, wherein: and a washer is sleeved on the bolt (6) between the impeller (2) and the head of the bolt (6).

7. An impeller locking structure according to claim 1, wherein: the transmission shaft (1) is sequentially provided with the threaded shaft section (11) and the conical surface shaft section (12) from the end part inwards.