An electric motor

Abstract

The present invention discloses an electric motor, which belongs to the field of electric power engineering. The electric motor includes: a motor pulley, a motor shaft, a sleeve, a fastener and a connecting key, wherein the motor pulley includes: a first pulley and a second pulley, the cross-sections of the first pulley and the second pulley are both semicircular rings, the first pulley and the second pulley can be combined into a hollow cylindrical structure, the motor pulley is wrapped on the sleeve, and the motor pulley is positioned and connected to the sleeve through a fastener, the sleeve is wrapped on the outer surface of the motor shaft, and the sleeve is connected to the motor shaft through a connecting key, the fastener passes through the motor pulley and the sleeve and contacts the outer surface of the motor shaft, and the pulley can be separated from the sleeve by unscrewing the fastener. The embodiment of the present invention provides a motor pulley with a split structure, which is convenient to replace motor pulleys of different sizes by unscrewing and screwing in the fastener, has good safety performance, and effectively improves work efficiency.

Description

Technical Field

[0001] The invention relates to the field of electric power engineering, and in particular to an electric motor. Background Art

[0002] In the production process of pumping wells and screw pump wells, it is usually necessary to replace the motor pulleys of different sizes for the motor to adjust the stroke frequency and the speed of the screw pump. For example, in the process of using the pumping unit for oil production, it is usually necessary to replace the motor pulleys of different sizes for the motor to adjust the stroke frequency to adapt to the fluid supply capacity of the oil well.

[0003] In the related art, the motor pulley installed on the motor is generally an integral structure and is fixed to the motor shaft by a key connection. For this connection method, a puller with a three-claw structure is commonly used as a tool for replacing the motor pulley. During operation, the three claws on the puller are placed in the gap between the motor pulley and the motor bearing cover.

[0004] In the process of replacing the motor pulley installed on the motor, the puller claws may fly out and injure people due to uneven force on the three claws on the puller. Moreover, when the gap between the motor pulley and the bearing cover is too small, the puller cannot be fixed. In addition, since the distance between the three claws on the puller is limited, the puller cannot be used to replace the motor pulley when the size of the motor pulley is large. Summary of the invention

[0005] In order to overcome the problems existing in the related art, an embodiment of the present invention provides a motor. The motor comprises: a motor pulley, a motor shaft, a shaft sleeve, a fastener and a connecting key;

[0006] Wherein, the motor pulley comprises: a first pulley and a second pulley, the cross sections of the first pulley and the second pulley are both semicircular rings, and the first pulley and the second pulley can be combined into a hollow cylindrical structure;

[0007] The motor pulley is wrapped around the sleeve, and the motor pulley is positioned and connected to the sleeve via the fastener, the sleeve is wrapped around the outer surface of the motor shaft, and the sleeve is connected to the motor shaft via the connecting key, the fastener passes through the motor pulley and the sleeve and contacts the outer surface of the motor shaft, and the pulley can be separated from the sleeve by unscrewing the fastener.

[0008] In a possible implementation, the first pulley includes at least one internally threaded through hole, the at least one internally threaded through hole is used to accommodate the fastener, and the internally threaded through hole has an internal thread that matches the external thread of the fastener.

[0009] In a possible implementation, two internal threaded through holes are provided on the first pulley.

[0010] In a possible implementation, the second pulley includes at least one internally threaded through hole, the at least one internally threaded through hole is used to accommodate the fastener, and the internally threaded through hole has an internal thread that matches the external thread of the fastener.

[0011] In a possible implementation, two internal thread through holes are provided on the second pulley.

[0012] In a possible implementation, the sleeve includes at least one internally threaded through hole, the at least one internally threaded through hole is used to accommodate the fastener, and the internally threaded through hole has an internal thread that matches the external thread of the fastener.

[0013] In a possible implementation, the number of the internally threaded through holes on the shaft sleeve is consistent with the number of the internally threaded through holes on the motor.

[0014] In a possible implementation manner, the fastener is a bolt.

[0015] In a possible implementation, the fastener is a hexagon socket single-head bolt.

[0016] The beneficial effects of the motor pulley and the motor provided by the present invention include at least:

[0017] An embodiment of the present invention provides a motor pulley with a split structure, and the motor pulley is installed on a sleeve for wrapping the motor shaft through a fastener, so that motor pulleys of different sizes can be replaced by screwing out and screwing in the fastener. Therefore, the motor pulley is relatively convenient to replace with good safety performance. It is suitable for replacing motor pulleys of any size and can shorten the time for replacing the motor pulley, effectively improving work efficiency.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 is a cross-sectional view of a motor provided by an embodiment of the present invention;

[0021] Figure 2 is a side view of a motor provided by an embodiment of the present invention;

[0022] The reference numerals in the figures represent respectively:

[0023] 1-motor pulley, 11-first pulley, 12-second pulley,

[0024] 2-motor shaft, 3-sleeve, 4-fastener,

[0025] 5- Connect key. DETAILED DESCRIPTION

[0026] To make the technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] The embodiment of the present invention provides a motor, as shown in the attached Figure 1 The motor comprises: a motor pulley 1, a motor shaft 2, a shaft sleeve 3, a fastener 4 and a connecting key 5;

[0028] The motor pulley 1 includes: a first pulley 11 and a second pulley 12. The cross sections of the first pulley 11 and the second pulley 12 are both semicircular rings. The first pulley 11 and the second pulley 12 can be combined into a hollow cylindrical structure.

[0029] The motor pulley 1 is wrapped around the shaft sleeve 3, and the motor pulley 1 is positioned and connected to the shaft sleeve 3 through a fastener 4. The shaft sleeve 3 is wrapped around the outer surface of the motor shaft 2, and the shaft sleeve 3 is connected to the motor shaft 2 through a connecting key 5. The fastener 4 passes through the motor pulley 1 and the shaft sleeve 3 and contacts the outer surface of the motor shaft 2. The pulley 1 can be separated from the shaft sleeve 3 by unscrewing the fastener 4.

[0030] The motor provided by the embodiment of the present invention can be used in scenarios involving the need to replace the motor pulley during the production process of the pumping well and the screw pump well. When the motor pulley 1 needs to be replaced, all the fasteners 4 used to fasten the hollow cylindrical structure and the sleeve 3 are first unscrewed to separate the hollow cylindrical structure from the sleeve 3, and the first pulley 11 and the second pulley 12 constituting the hollow cylindrical structure are separated, and then the first pulley 11 and the second pulley 12 of other sizes are positioned and connected to the sleeve 3 through the fasteners 4.

[0031] It can be seen that since the embodiment of the present invention provides a motor pulley 1 with a split structure, and the motor pulley 1 is installed on the motor through the fastener 4, it is possible to replace motor pulleys of different sizes by screwing out and screwing in the fastener 4. Therefore, the motor pulley 1 is relatively convenient to disassemble and has good safety performance. It is suitable for replacing motor pulleys of any size and can shorten the time for replacing the motor pulley 1, effectively improving work efficiency.

[0032] In addition, the embodiment of the present invention further wraps the motor shaft 2 with a shaft sleeve 3 to protect the motor shaft 2 and avoid damage to the motor shaft 2 when the motor pulley 1 is replaced.

[0033] Compared with the method of using a puller tool to remove the motor pulley 1 and using tools such as a sledgehammer to install the motor pulley 1, this method avoids the puller claws flying out and injuring people due to uneven force on the three claws on the puller when removing the motor pulley 1, as well as the situation where the puller cannot be used when the gap between the motor pulley 1 and the bearing cover is too small and the size of the motor pulley 1 is large, and avoids the situation where the motor is damaged by excessive impact force caused by using tools such as a sledgehammer when installing the motor pulley 1.

[0034] It should be noted that during the installation of the motor pulley, the length of the fastener 4 is not a fixed value, and it is only necessary to ensure that it has a required length. For example, the fastener 4 can pass through the outermost motor pulley of the motor and the shaft sleeve, and contact the innermost motor shaft 2 of the motor. At this time, the fastener 4 presses against the motor shaft 2 to achieve a fixed connection between the motor pulley 1 and the shaft sleeve 3, that is, the fastener 4 contacts the outer surface of the motor shaft 2 after passing through the motor pulley 1 and the shaft sleeve 3.

[0035] In summary, the embodiments of the present invention are not only easy to operate, time-saving, labor-saving, and safe when replacing motor pulleys 1 of different sizes, but also can shorten the time and effectively improve the work efficiency.

[0036] It should be noted that, since the size of the shaft sleeve 3 is fixed, in order to fix motor pulleys 1 of different sizes on the shaft sleeve 3, the diameters of the hollow circles of the hollow cylindrical structures formed by motor pulleys 1 of different sizes must be consistent.

[0037] In a possible implementation, the above-mentioned hollow cylindrical structure is positioned and connected to the sleeve 3 via the fastener 4, including: the first pulley 11 is positioned and connected to the sleeve 3 via the fastener 4, and the second pulley 12 is positioned and connected to the sleeve 3 via the fastener 4.

[0038] For example, the fastener 4 may be a bolt, wherein the bolt head may have any shape, such as a hexagonal head, a round head, a square head, etc., and the bolt head shape may be an inner hexagonal shape or an outer hexagonal shape, etc., which is not specifically limited in the embodiment of the present invention. Figure 2 As shown, the fastener 4 is a hexagon socket single-head bolt.

[0039] In addition, in order to accommodate the fastener 4, as shown in the attached Figure 1 As shown, the first pulley 11 is provided with an internal threaded through hole, wherein the number of the internal threaded through holes can be any value not less than 1. Exemplarily, the first pulley 11 is provided with two internal threaded through holes, that is, the first pulley 11 is positioned and connected to the shaft sleeve 3 through two fasteners 4, and the two internal threaded through holes have internal threads adapted to the external threads of the fasteners 4.

[0040] Similarly, an internal threaded through hole is also provided on the second pulley 12, and the number of the internal threaded through holes can be any value not less than 1. Exemplarily, two internal threaded through holes are also provided on the second pulley 12, that is, the second pulley 12 is also positioned and connected to the shaft sleeve 3 through two fasteners 4, and the two internal threaded through holes have internal threads adapted to the external threads of the fasteners 4.

[0041] As attached Figure 1 As shown, in order to fix the motor pulley 1, an internal threaded through hole is also required to be provided on the shaft sleeve 3 to accommodate the fastener 4, so that the fastener 4 passes through the internal threaded through hole on the motor pulley 1 and then screws into the internal threaded through hole provided on the shaft sleeve 3. At the same time, the internal threaded through hole provided on the shaft sleeve 3 has an internal thread that matches the external thread of the fastener 4, and the position of the internal threaded through hole provided on the shaft sleeve 3 is consistent with the position of the internal threaded through hole provided on the motor pulley 1. Similarly, the number of the internal threaded through holes provided on the shaft sleeve 3 is also consistent with the number of the internal threaded through holes provided on the motor pulley 1.

[0042] In summary, when it is necessary to replace the motor pulley 1 of a different size, first remove the motor pulley 1 currently wrapped in the sleeve 3 by unscrewing the fastener 4, and then combine the two split structures of the motor pulley of other sizes to form a hollow cylindrical structure, and wrap the hollow cylindrical structure on the sleeve 3 by the fastener 4, that is, fix the motor pulley 1 of the new size on the sleeve 3 by screwing in the fastener 4. In the embodiment of the present invention, the two split structures are respectively named as the first pulley 11 and the second pulley 12. In other words, the embodiment of the present invention replaces the motor pulley 1 of different sizes by unscrewing and screwing in the fastener 4, which is not only simple to operate, time-saving, labor-saving, and safe, but also can shorten the time for replacing the motor pulley 1, effectively improving work efficiency.

[0043] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0044] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. An electric motor, characterized in that: The motor comprises: a motor pulley (1), a motor shaft (2), a shaft sleeve (3), a fastener (4) and a connecting key (5); The motor pulley (1) comprises: a first pulley (11) and a second pulley (12); the cross-sections of the first pulley (11) and the second pulley (12) are both semicircular rings; the first pulley (11) and the second pulley (12) can be combined into a hollow cylindrical structure; The first pulley (11) comprises at least one first internally threaded through hole, the at least one first internally threaded through hole is used to accommodate the fastener (4), and the first internally threaded through hole has an internal thread that matches the external thread of the fastener (4); The second pulley (12) comprises at least one second internally threaded through hole, the at least one second internally threaded through hole is used to accommodate the fastener (4), and the second internally threaded through hole has an internal thread that matches the external thread of the fastener (4); The motor pulley (1) is wrapped around the shaft sleeve (3), and the shaft sleeve (3) includes at least one third internally threaded through hole, and the at least one third internally threaded through hole is used to accommodate the fastener (4), and the third internally threaded through hole has an internal thread that is adapted to the external thread of the fastener (4); the first pulley (11) is positioned and connected to the shaft sleeve (3) through the fastener (4), and the second pulley (12) is positioned and connected to the shaft sleeve (3) through the fastener (4); The sleeve (3) is wrapped around the outer surface of the motor shaft (2), and the sleeve (3) is connected to the motor shaft (2) via the connecting key (5); the fastener (4) passes through the motor pulley (1) and the sleeve (3) and contacts the outer surface of the motor shaft (2); the pulley (1) and the sleeve (3) can be separated by unscrewing the fastener (4).

2. The electric motor according to claim 1, characterized in that The first pulley (11) is provided with two internal thread through holes.

3. The electric motor according to claim 1, characterized in that The second pulley (12) is provided with two internal thread through holes.

4. The electric motor according to claim 1, characterized in that The number of the internal threaded through holes on the shaft sleeve (3) is consistent with the number of the internal threaded through holes on the motor pulley (1).

5. The electric motor according to any one of claims 1 to 4, characterized in that: The fastener (4) is a bolt.

6. The electric motor according to claim 5, characterized in that The fastener (4) is a hexagon socket single-head bolt.

Images