Oil pump motor shaft

Abstract

The utility model relates to the field of motor shafts, in particular to an oil pump motor shaft, and adopts the technical scheme that the oil pump motor shaft comprises a first shaft body, a second shaft body, a motor connecting end, an impeller connecting end, an external connector, a first internal connector, a second internal connector and a threaded sleeve, the rear end of the first shaft body is fixedly connected with an external connector, and the external connector and the first protruding block are matched with the first internal connector and the second internal connector so that the first shaft body and the second shaft body can be installed in a limited mode. Furthermore, the first shaft body and the second shaft body can be tightly embedded and mounted together by matching an embedding groove with an embedding column, and the first shaft body and the second shaft body which are embedded are additionally fixed by a thread sleeve which is movably arranged in a threaded manner; therefore, the first shaft body and the second shaft body can be quickly disassembled and assembled, and meanwhile, the connection firmness can be guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of motor shafts, and specifically relates to an oil pump motor shaft. Background Technology

[0002] The oil pump assembly mainly includes a motor and an oil pump connected to the output end of the motor. The motor mainly includes a motor body and a motor shaft, with one end of the motor shaft passing through the motor body to form the output end of the motor. The oil pump mainly includes an impeller fixed to the output end of the motor, which delivers gasoline to the engine through the rotation of the impeller.

[0003] In existing motors, the motor shaft is generally cast as a single piece during machining. When the motor is running, the mating area between the motor shaft and the oil pump is subjected to a large load, which easily leads to wear. In addition, certain tolerances are inevitable during actual installation. The large centrifugal force generated by the impeller during rotation also puts a large load on the motor shaft, causing wear. As a result, it is often difficult to remove and replace the motor shaft separately after installation. Generally, the entire motor needs to be replaced, which increases the cost of motor replacement and maintenance.

[0004] Therefore, in response to the problem that most existing motor shafts are integrated designs, making it difficult to replace and repair them in a timely manner when damaged, a new type of oil pump motor shaft has been developed. By adding a quick-disassembly structure, an internal and external multi-layer interlocking structure, and an external threaded auxiliary fixing structure to the motor shaft, the existing motor shaft can be replaced in a timely manner when damaged, and the assembly of modular shafts can be strengthened to ensure the working effect of the motor shaft. Utility Model Content

[0005] To overcome the problem that most existing motor shafts are integrated designs, making it difficult to replace and repair them in a timely manner when they are damaged.

[0006] The technical solution of this utility model is as follows: an oil pump motor shaft, including a first shaft body, a second shaft body, a motor connecting end and an impeller connecting end, and also including an external connector, a first internal connector, a second internal connector and a threaded sleeve. The outer wall of the front end of the second shaft body is provided with an external thread. The rear end of the first shaft body is fixedly connected to the external connector. The outer wall of the external connector is fixedly connected to four sets of first protrusions that are equidistantly distributed around the external connector. The inner wall of the external connector is fixedly connected to the first internal connector. The center of the rear end of the first internal connector is fixedly connected to a fitting post. The edge of the rear end of the first internal connector is fixedly connected to a second protrusion that is equidistantly distributed around the first internal connector. The front end of the second shaft body is provided with a connecting groove. The inner wall of the connecting groove is provided with four sets of first grooves that are equidistantly distributed around the connecting groove. The inner wall of the connecting groove is fixedly connected to the second internal connector. The center of the front end of the second internal connector is provided with a fitting groove. The outer wall of the second internal connector is provided with four sets of second grooves that are equidistantly distributed around the second internal connector.

[0007] Preferably, the inner wall of the threaded sleeve is adapted to the external thread, and the outer wall of the external connector is fitted to the inner wall of the connecting groove.

[0008] Preferably, the first protrusion is adapted to the first groove, and the second protrusion is adapted to the second groove.

[0009] Preferably, the rear end of the first internal connector fits into the front end of the second internal connector, and the fitting post is adapted to the fitting groove.

[0010] Preferably, a limiting sleeve is fixedly connected to the rear edge of the first shaft, and a threaded sleeve is disposed on the outer wall of the limiting sleeve.

[0011] Preferably, the rear end of the first shaft is fitted with the front end of the second shaft, and the outer wall of the front end of the second shaft is fitted with the inner wall of the threaded sleeve.

[0012] Preferably, the front end of the first shaft is fixedly connected to an impeller connection end, and the rear end of the second shaft is fixedly connected to a motor connection end.

[0013] The beneficial effects of this utility model are:

[0014] 1. The external connector and the first protrusion facilitate workers to assemble the first shaft into the connecting groove and the first recess on the second shaft for initial fixation. Then, the first internal connector and the second internal connector can perform secondary positioning and installation of the first and second shafts. Furthermore, the fitting groove and the fitting post can tightly fit the first and second shafts together. Compared with the original bolt connection method, this method can better improve the firmness of the splicing and assembly of the first and second shafts, so that they can maintain the best working condition during high-speed rotation.

[0015] 2. By using a threaded sleeve with an adjustable setting to provide additional threaded fixation for the fitted first and second shafts, compared to the original bolt structure, the first and second shafts can be quickly assembled and disassembled while ensuring a firm connection. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the oil pump motor shaft of this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional disassembled view of the oil pump motor shaft of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional disassembled view of the first shaft body, impeller connection end, and limiting sleeve of the oil pump motor shaft of this utility model.

[0019] Figure 4The diagram shown is a three-dimensional disassembled view of the external connector, the first internal connector, the second protrusion, and the fitting post of the oil pump motor shaft of this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional disassembled view of the second shaft body, motor connection end, and external thread of the oil pump motor shaft of this utility model.

[0021] Figure 6 The diagram shown is a three-dimensional disassembled view of the second internal connector and the second shaft of the oil pump motor shaft of this utility model.

[0022] Figure 7 The diagram shown is a three-dimensional disassembled view of the threaded sleeve of the oil pump motor shaft of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1-First shaft, 2-Second shaft, 3-Motor connection end, 4-Impeller connection end, 5-Threaded sleeve, 6-Limiting sleeve, 7-External connector, 8-First protrusion, 9-First internal connector, 10-Second protrusion, 11-Matching post, 12-External thread, 13-Connecting groove, 14-First groove, 15-Second internal connector, 16-Second groove, 17-Matching groove. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please see Figures 1-7This utility model provides an embodiment: an oil pump motor shaft, including a first shaft body 1, a second shaft body 2, a motor connecting end 3, and an impeller connecting end 4, and also includes an external connector 7, a first internal connector 9, a second internal connector 15, and a threaded sleeve 5. The outer wall of the front end of the second shaft body 2 has an external thread 12. The rear end of the first shaft body 1 is fixedly connected to the external connector 7. The outer wall of the external connector 7 has four sets of first protrusions 8 equidistantly distributed around the external connector 7. The inner wall of the external connector 7 is fixedly connected to the first internal connector 9. The center of the rear end of the first internal connector 9 is fixedly connected to a fitting post 11. The rear edge of the first internal connector 9 has second protrusions 10 equidistantly distributed around the first internal connector 9. The front end of the second shaft body 2 has a connecting groove 13. The inner wall of the connecting groove 13 has four sets of first grooves 14 equidistantly distributed around the connecting groove 13. The inner wall of the 3 is fixed with a second internal connector 15. The front center of the second internal connector 15 is provided with a fitting groove 17. The outer wall of the second internal connector 15 is provided with four sets of second grooves 16 evenly distributed around the second internal connector 15. Through the external connector 7 and the first protrusion 8, the worker can easily assemble the first shaft 1 into the connecting groove 13 and the first groove 14 on the second shaft 2 to achieve initial fixation. Then, the first internal connector 9 cooperates with the second internal connector 15 to perform secondary positioning and installation of the first shaft 1 and the second shaft 2. Furthermore, through the fitting groove 17 and the fitting post 11, the first shaft 1 and the second shaft 2 can be tightly fitted together. The threaded sleeve 5 is movably provided to provide additional thread fixation for the fitted first shaft 1 and the second shaft 2, so that the first shaft 1 and the second shaft 2 can meet the requirements of quick disassembly and assembly while ensuring the connection is firm.

[0026] Please see Figures 4-5 In this embodiment, the inner wall of the threaded sleeve 5 is adapted to the external thread 12, and the outer wall of the external connector 7 is fitted to the inner wall of the connecting groove 13. During use, the threaded sleeve 5, which can slide and adjust along the outer wall of the limiting sleeve 6, can provide additional auxiliary fixation after the first shaft 1 and the second shaft 2 are assembled, thereby improving the firmness of the assembled first shaft 1 and second shaft 2. The first protrusion 8 is adapted to the first groove 14, and the second protrusion 10 is adapted to the second groove 16. During use, the first protrusion 8... The second protrusion 10, in conjunction with the first groove 14 and the second groove 16, can fix the interface of the first shaft 1 and the second shaft 2 in an inner and outer layer, thereby improving the stability of the splicing and installation of the first shaft 1 and the second shaft 2. The rear end of the first internal connector 9 fits against the front end of the second internal connector 15. The fitting post 11 is adapted to the fitting groove 17. In use, the fitting post 11, in conjunction with the fitting groove 17, can further assist the first shaft 1 and the second shaft 2 in fitting and assembling, so as to prevent the motor shaft from disintegrating during use.

[0027] Please see Figures 3-7 In this embodiment, a limiting sleeve 6 is fixedly connected to the rear edge of the first shaft 1, and a threaded sleeve 5 is disposed on the outer wall of the limiting sleeve 6. During use, the limiting sleeve 6 can limit and support the threaded sleeve 5 to prevent it from falling off the outer wall of the first shaft 1. The rear end of the first shaft 1 is in contact with the front end of the second shaft 2, and the outer wall of the front end of the second shaft 2 is in contact with the inner wall of the threaded sleeve 5. During use, the service life of the first shaft 1 and the second shaft 2, which are made of stainless steel 4Cr13 material, can be greatly improved. An impeller connecting end 4 is fixedly connected to the front end of the first shaft 1, and a motor connecting end 3 is fixedly connected to the rear end of the second shaft 2. During use, the impeller connecting end 4 and the motor connecting end 3 enable the first shaft 1 and the second shaft 2 to have different connection functions, which also makes it easier for workers to maintain the motor shaft.

[0028] When in use, install the assembled first shaft 1 and second shaft 2 onto the motor body, and install the impeller connection end 4 and the motor connection end 3 into the appropriate positions respectively;

[0029] When the shaft needs to be replaced, first unscrew the threaded sleeve 5 to remove it from the external thread 12. Then, hold the first shaft 1 by hand and pull it forward so that the external connector 7 and its first protrusion 8 move forward along the inner wall of the connecting groove 13 and the first recess 14. This will cause the fitting post 11, the first internal connector 9 and its second protrusion 10 to move forward along the inner wall of the second recess 16 and the fitting groove 17. The damaged first shaft 1 has been removed from the second shaft 2. When installing a new first shaft 1, the same operation is performed.

[0030] Through the above steps, the external connector 7 and the first protrusion 8 facilitate the worker's assembly of the first shaft 1 into the connecting groove 13 and the first recess 14 on the second shaft 2 to achieve initial fixation. Then, the first internal connector 9 and the second internal connector 15 can perform secondary positioning and installation of the first shaft 1 and the second shaft 2. Furthermore, the fitting groove 17 and the fitting post 11 can tightly fit the first shaft 1 and the second shaft 2 together. The movable threaded sleeve 5 provides additional thread fixation for the fitted first shaft 1 and the second shaft 2, so that the first shaft 1 and the second shaft 2 can be quickly disassembled and assembled while ensuring the connection is firm. This solves the problem that most existing motor shafts are integrated designs, making it difficult to replace and repair them in a timely manner when damaged.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An oil pump motor shaft, comprising a first shaft body (1), a second shaft body (2), a motor connecting end (3), and an impeller connecting end (4), characterized in that: It also includes an external connector (7), a first internal connector (9), a second internal connector (15), and a threaded sleeve (5). The outer wall of the front end of the second shaft (2) is provided with an external thread (12). The rear end of the first shaft (1) is fixedly connected to the external connector (7). The outer wall of the external connector (7) is fixedly connected to four sets of first protrusions (8) that are equidistantly distributed around the external connector (7). The inner wall of the external connector (7) is fixedly connected to the first internal connector (9). The center of the rear end of the first internal connector (9) is fixedly connected to a fitting post (11). The rear end of the first internal connector (9) is... A second protrusion (10) is fixedly connected to the edge and is equidistantly distributed around the first internal connector (9). A connecting groove (13) is provided at the front end of the second shaft (2). Four sets of first grooves (14) are equidistantly distributed around the connecting groove (13) on the inner wall of the connecting groove (13). A second internal connector (15) is fixedly connected to the inner wall of the connecting groove (13). A fitting groove (17) is provided at the center of the front end of the second internal connector (15). Four sets of second grooves (16) are equidistantly distributed around the second internal connector (15) on the outer wall of the second internal connector (15).

2. The oil pump motor shaft according to claim 1, characterized in that: The inner wall of the threaded sleeve (5) is adapted to the external thread (12), and the outer wall of the external connector (7) is fitted to the inner wall of the connecting groove (13).

3. The oil pump motor shaft according to claim 2, characterized in that: The first protrusion (8) is adapted to the first groove (14), and the second protrusion (10) is adapted to the second groove (16).

4. The oil pump motor shaft according to claim 3, characterized in that: The rear end of the first internal connector (9) fits against the front end of the second internal connector (15), and the fitting post (11) is adapted to the fitting groove (17).

5. The oil pump motor shaft according to claim 4, characterized in that: A limiting sleeve (6) is fixedly connected to the rear edge of the first shaft (1), and a threaded sleeve (5) is disposed on the outer wall of the limiting sleeve (6).

6. The oil pump motor shaft according to claim 5, characterized in that: The rear end of the first shaft (1) is in contact with the front end of the second shaft (2), and the outer wall of the front end of the second shaft (2) is in contact with the inner wall of the threaded sleeve (5).

7. The oil pump motor shaft according to claim 6, characterized in that: The front end of the first shaft (1) is fixedly connected to the impeller connection end (4), and the rear end of the second shaft (2) is fixedly connected to the motor connection end (3).

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