A single bearing structure traction motor

Abstract

The present invention discloses a single-bearing structure traction motor, comprising a casing, an inner cavity of the casing being provided with a rotating shaft, and the rotating shaft being provided with a stator. When the present invention is in use, two fixing blocks are respectively inserted into the inner cavities of two grooves, and two circular rings are pulled away from each other, so that two limiting rods are respectively disengaged from the inner cavities of adjacent third blind holes, and the two moving blocks are pushed to move to the right, thereby pushing the two balls to move to the right, and the two balls move to the right to squeeze the two trapezoidal blocks away from each other, and drive the two positioning rods away from each other, so that the two positioning rods are respectively inserted into the inner cavities of adjacent second blind holes, and after the circular rings are loosened, the ends of the two limiting rods that are away from each other are respectively inserted into the inner cavities of adjacent third blind holes, thereby fixing the protective cover on the left side of the bearing body, and pressing and fixing the bearing body by setting two pressure plates, thereby realizing quick disassembly and assembly of the bearing body, and convenient operation.

Description

Technical Field

[0001] The present invention relates to the technical field of traction motors, and in particular to a single-bearing structured traction motor. Background Art

[0002] An electric motor used to drive one or more driving wheel axles on a locomotive or EMU. There are many types of traction motors, such as DC traction motors, AC asynchronous traction motors, and AC synchronous traction motors. DC traction motors, especially DC series motors, have good speed regulation performance and working characteristics, meet the needs of locomotive traction characteristics, and are widely used.

[0003] The existing single-bearing structure traction motor is not convenient for quick disassembly and replacement of the bearing when the bearing is damaged, and sometimes it is necessary to add lubricating oil to the bearing for maintenance during long-term use. However, the existing technology of adding lubricating oil is relatively cumbersome and complicated, which increases the labor intensity of the staff and has low efficiency. Summary of the invention

[0004] The technical problem solved by the present invention is to overcome the defects of the prior art and provide a single-bearing structured traction motor.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a single-bearing structure traction motor, comprising a casing, an inner cavity of the casing is provided with a rotating shaft, and the rotating shaft is provided with a stator, the outer side of the stator is connected to a rotor, a circular hole is opened at the middle position of the left side of the casing, and a bearing body is provided on the left side of the inner cavity of the circular hole, two retaining rings are sleeved on the outer side of the bearing body, and the two retaining rings are arranged on the left and right, a limiting ring is fixedly connected to the right side of the inner cavity of the circular hole, and the left side of the limiting ring is fitted with the adjacent retaining ring, the left end of the rotating shaft is inserted into the inner cavity of the bearing body, a protective cover is provided on the left side of the bearing body, and a clamping mechanism is provided between the protective cover and the casing, an oil box is provided in the inner cavity of the protective cover, and a plurality of oil nozzles are inserted on the right side of the oil box, and the inner cavity of the oil box is fitted near the left side. A circular plate is provided, and a first through-hole is provided at the center of the circular plate, a refueling pipe is passed through the inner cavity of the first through-hole, a support plate is fixedly connected to the inner wall of the protrusion on the protective cover, and a through-hole is provided on the support plate, a hollow tube is passed through the inner cavity of the through-hole, and the right end of the hollow tube is fixedly connected to the left side of the oil box, and one end of the refueling pipe passes through the left side of the oil box and the inner cavity of the hollow tube, and extends to the outside of the oil box, an extrusion mechanism is provided on the left side of the circular plate, an opening is provided on the left side of the protective cover, and a cover plate is hinged on the top of the inner cavity of the opening, a limiting mechanism is provided at the left bottom of the cover plate, a sound sensor and a controller are fixedly connected to the inner cavity top of the protective cover near the right side, and the controller is located on the left side of the sound sensor, and a buzzer is fixedly connected to the inner cavity top of the protective cover near the left side.

[0006] Preferably, heat dissipation openings are provided at the top and the bottom of the protective cover, and a dustproof net is fixedly connected to the inner cavity of the heat dissipation opening.

[0007] Preferably, pressure plates are fitted on the left top and bottom of the left side of the retaining ring on the left, and the sides of the two pressure plates that are far away from each other are respectively fixedly connected to the top and bottom of the inner cavity of the protective cover, and the retaining ring on the left side is provided with an eighth through hole near the top and bottom, and an insertion rod is penetrated through the inner cavity of the eighth through hole, and the left ends of the two insertion rods are respectively fixedly connected to adjacent pressure plates.

[0008] Preferably, the extrusion mechanism includes two electric push rods, and the two electric push rods are respectively located on the left side of the circular plate near the top and the bottom, the left ends of the two electric push rods are fixedly connected to the left side wall of the inner cavity of the oil box, and the power ends of the two electric push rods are fixedly connected to the left side of the circular plate.

[0009] Preferably, a first fixing ring is sleeved on the outer side of the refueling pipe near the left end, and a plurality of first gripping rods are fixedly connected to the outer side wall of the first fixing ring, a first blind hole is opened on the right side of the first fixing ring near the top and the bottom, a second fixing ring is sleeved on the outer side of the hollow tube near the left end, and a plurality of second gripping rods are fixedly connected to the outer side wall of the second fixing ring, a first cavity is opened on the second fixing ring near the top, and a first spring is fixedly connected to the right side wall of the inner cavity of the first cavity, a first limit block is fixedly connected to the left end of the first spring, and a first cross bar is fixedly connected to the left side of the first limit block, a second through hole is opened on the left side of the first cavity, and the left end of the first cross bar passes through the second through hole and is inserted in the adjacent first blind hole inner cavity, and a toggle ring is sleeved on the outer side of the first cross bar near the left end.

[0010] Preferably, the clamping mechanism includes two fixing plates, and the two fixing plates are respectively fixedly connected to the top and bottom right sides of the protective cover, the right sides of the two fixing plates are fixedly connected to fixing blocks, the left side of the housing is provided with two grooves, and the two grooves are respectively located at the top and bottom of the circular hole, the two fixing blocks are respectively inserted into the adjacent groove cavities, the two fixing blocks are respectively provided with a second cavity, and the right side wall of the inner cavity of the second cavity is fitted with a trapezoidal block, the right sides of the two trapezoidal blocks are fixedly connected to sliders, the right side walls of the two second cavities are provided with sliding grooves, and the two sliders are respectively movably connected to adjacent sliding The inner cavity of the groove, the sides of the two trapezoidal blocks away from each other are fixedly connected with a positioning rod, the sides of the two second cavities away from each other are provided with a third through hole, the sides of the two groove inner cavities away from each other are provided with a second blind hole, the adjacent sides of the two trapezoidal blocks are provided with a ball, and the left side of the ball is fixedly connected with a second cross bar, the left sides of the two second cavities are provided with a fourth through hole, the two fixed plates are provided with a fifth through hole, the left ends of the two second cross bars respectively pass through the adjacent fourth through hole and fifth through hole cavities, and are fixedly connected with moving blocks, and the adjacent sides of the two moving blocks are respectively fitted with the top and bottom of the protective cover.

[0011] Preferably, a third cavity is provided on the two moving blocks, and a second limit block is fitted in the inner cavity of the third cavity, a limit rod is passed through the two second limit blocks, a sixth through hole is provided on the top and bottom of the two third cavities, two third blind holes are provided on the top and bottom of the protective cover near the right side, and the two third blind holes are arranged on the left and right, the adjacent ends of the two limit rods respectively pass through the adjacent sixth through holes and are inserted in the adjacent third blind hole cavities, the distant ends of the two limit rods respectively pass through the adjacent sixth through hole cavities and are fixedly connected with a ring, the outer sides of the two limit rods are sleeved with a second spring, and the two ends of the second spring are respectively fixedly connected to the second limit block and the inner wall of the third cavity.

[0012] Preferably, the limiting mechanism includes a limiting plate, and the limiting plate is fittedly arranged at the bottom of the left side of the cover plate, a third cross bar is fixedly connected to the right side of the limiting plate near the bottom, a fourth cavity is opened at the bottom of the protective cover near the left side, and a seventh through hole is opened on the left side of the fourth cavity, the right end of the third cross bar passes through the inner cavity of the seventh through hole and is fixedly connected to a third limiting block, a third spring is sleeved on the outer side of the third cross bar, and the left and right ends of the third spring are respectively fixedly connected to the inner wall of the fourth cavity and the third limiting block.

[0013] Preferably, a baffle is fitted at the bottom of the right side of the cover plate, and the bottom of the baffle is fixedly connected to the bottom of the open inner cavity.

[0014] Preferably, the right-view cross-section of the oil box is circular, the plurality of fuel injectors are evenly distributed on the right side of the oil box, and the plurality of fuel injectors are arranged in a circular array with the right center of the oil box as the center.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention inserts two fixing blocks into the inner cavities of the two grooves respectively, and pulls the two circular rings away from each other, so that the two limiting rods are respectively disengaged from the adjacent third blind hole inner cavities, and pushes the two moving blocks to move rightward, thereby pushing the two balls to move rightward, and the two balls move rightward to squeeze the two trapezoidal blocks away from each other, and drive the two positioning rods away from each other, so that the two positioning rods are respectively inserted into the adjacent second blind hole inner cavities, and after loosening the circular rings, the ends of the two limiting rods that are away from each other are respectively inserted into the adjacent third blind hole inner cavities, thereby fixing the protective cover on the left side of the bearing body, and pressing and fixing the bearing body by setting two pressing plates, thereby realizing quick disassembly and assembly of the bearing body, and convenient operation;

[0017] 2. The present invention can monitor the bearing body through the mutual cooperation among the sound sensor, the controller and the buzzer. When the bearing body makes an abnormal sound, the staff is reminded to refuel and maintain in time, and the limit plate is pulled to move to the left, and the bottom of the cover plate is pulled to deflect to the left, so as to open the opening, and the toggle ring is pulled to move to the right, so that the left end of the first cross bar is disengaged from the inner cavity of the first blind hole, and the first worm gears are held and rotated. After the first fixed ring is rotated ninety degrees, the left end of the first cross bar is re-inserted into the inner cavity of the adjacent first blind hole, and lubricating oil is added to the oil box through the refueling pipe, and the two electric push rods are started. The two electric push rods jointly push the circular plate to move to the right, so that the lubricating oil in the oil box is sprayed into the inner cavity of the bearing body through the plurality of oil nozzles, and the plurality of second grips are rotated to drive the oil box to rotate, so that the oil spraying is more uniform, thereby achieving the purpose of convenient maintenance of the bearing body, reducing the labor intensity of the staff and improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a right side view of the oil box component of the present invention;

[0020] Figure 3 A three-dimensional view of the bearing body of the component of the present invention;

[0021] Figure 4 for Figure 1 The enlarged view of point A in the middle;

[0022] Figure 5 for Figure 1 The enlarged view of point B in the middle;

[0023] Figure 6 for Figure 1 Enlarged view of point C in the middle;

[0024] Figure 7 for Figure 1 The enlarged view of point D in the middle;

[0025] Figure 8 for Figure 1 Enlarged view of point E in the middle.

[0026] Numbers in the figure: 1, housing; 2, shaft; 3, stator; 4, rotor; 5, bearing body; 6, retaining ring; 7, protective cover; 8, dust screen; 9, cover plate; 10, pressure plate; 11, oil box; 12, fuel injection nozzle; 13, sound sensor; 14, controller; 15, buzzer; 16, electric push rod; 17, round plate; 18, fuel pipe; 19, hollow pipe; 20, fixed plate; 21, fixed block; 22, trapezoidal block; 23 , positioning rod; 24, ball; 25, second cross bar; 26, moving block; 27, second limit block; 28, limit rod; 29, second spring; 30, ring; 31, first fixed ring; 32, first grip rod; 33, second fixed ring; 34, second grip rod; 35, first spring; 36, first limit block; 37, first cross bar; 38, limit plate; 39, third cross bar; 40, third limit block; 41, third spring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-8The present invention provides a technical solution: a single-bearing structure traction motor, including a casing 1, an inner cavity of the casing 1 is provided with a rotating shaft 2, and a stator 3 is provided on the rotating shaft 2, and a rotor 4 is connected to the outer side of the stator 3, a circular hole is opened at the middle position of the left side of the casing 1, and a bearing body 5 is provided on the left side of the inner cavity of the circular hole, and two retaining rings 6 are sleeved on the outer side of the bearing body 5, and the two retaining rings 6 are arranged on the left and right, a limiting ring is fixedly connected to the right side of the inner cavity of the circular hole, and the left side of the limiting ring is in contact with the adjacent retaining ring 6, the left end of the rotating shaft 2 is inserted into the inner cavity of the bearing body 5, and a protective cover 7 is provided on the left side of the bearing body 5, and the protective cover 7 is provided on the left side of the bearing body 5. A clamping mechanism is provided between the cover 7 and the casing 1, and a pressure plate 10 is fitted on the top and bottom of the left side of the retaining ring 6 on the left side, and the two pressure plates 10 are fixedly connected to the top and bottom of the inner cavity of the protective cover 7 on the sides away from each other, respectively. An eighth through hole is provided near the top and bottom of the retaining ring 6 on the left side, and a plug rod is penetrated through the inner cavity of the eighth through hole. The left ends of the two plug rods are fixedly connected to the adjacent pressure plates 10, respectively, to fix the bearing body 5 in the inner cavity of the circular hole. A heat dissipation port is provided on the top and bottom of the protective cover 7, and a dustproof net 8 is fixedly connected to the inner cavity of the heat dissipation port to improve the heat dissipation effect and anti-dust effect of the bearing body 5. In order to prevent dust from leaking out, the inner cavity of the protective cover 7 is provided with an oil box 11, and a plurality of fuel nozzles 12 are plugged into the right side of the oil box 11. The right-view cross-section of the oil box 11 is circular, and a plurality of fuel nozzles 12 are evenly distributed on the right side of the oil box 11, and a plurality of fuel nozzles 12 are arranged in a circular array with the right side center of the oil box 11 as the center. A circular plate 17 is fitted near the left side of the inner cavity of the oil box 11, and a first through hole is opened at the center of the circular plate 17, and a refueling pipe 18 is penetrated through the inner cavity of the first through hole. A support plate is fixedly connected to the inner wall of the protrusion on the protective cover 7, and a through hole is opened on the support plate, and a hollow through hole is penetrated through the inner cavity of the through hole. Tube 19, and the right end of the hollow tube 19 is fixedly connected to the left side of the oil box 11, and one end of the refueling pipe 18 passes through the left side of the oil box 11 and the inner cavity of the hollow tube 19, and extends to the outside of the oil box 11, a squeezing mechanism is provided on the left side of the circular plate 17, an opening is opened on the left side of the protective cover 7, and a cover plate 9 is hinged on the top of the inner cavity of the opening, and a limiting mechanism is provided at the bottom of the left side of the cover plate 9, a sound sensor 13 and a controller 14 are fixedly connected to the top of the inner cavity of the protective cover 7 near the right side, and the controller 14 is located on the left side of the sound sensor 13, and a buzzer 15 is fixedly connected to the top of the inner cavity of the protective cover 7 near the left side;

[0029] The extrusion mechanism includes two electric push rods 16, and the two electric push rods 16 are respectively located on the left side of the circular plate 17 near the top and the bottom. The left ends of the two electric push rods 16 are fixedly connected to the left wall of the inner cavity of the oil box 11, and the power ends of the two electric push rods 16 are fixedly connected to the left side of the circular plate 17. A first fixing ring 31 is sleeved on the outer side of the refueling pipe 18 near the left end, and a plurality of first gripping rods 32 are fixedly connected to the outer side wall of the first fixing ring 31. A first blind hole is opened on the right side of the first fixing ring 31 near the top and the bottom. A second fixing ring 33 is sleeved on the outer side of the hollow tube 19 near the left end, and the second fixing ring 33 is sleeved on the outer side of the hollow tube 19 near the left end. A plurality of second gripping rods 34 are fixedly connected to the outer wall of the fixed ring 33, a first cavity is opened near the top of the second fixed ring 33, and a first spring 35 is fixedly connected to the right side wall of the inner cavity of the first cavity, a first limit block 36 is fixedly connected to the left end of the first spring 35, and a first cross bar 37 is fixedly connected to the left side of the first limit block 36, a second through hole is opened on the left side of the first cavity, and the left end of the first cross bar 37 passes through the second through hole and is inserted into the adjacent first blind hole inner cavity, and a toggle ring is sleeved on the outer side of the first cross bar 37 near the left end, so as to evenly spray the lubricating oil in the oil box 11 into the inner cavity of the bearing body 5;

[0030] The clamping mechanism includes two fixing plates 20, and the two fixing plates 20 are fixedly connected to the top and the right side of the bottom of the protective cover 7, respectively. The right sides of the two fixing plates 20 are fixedly connected with fixing blocks 21. The left side of the housing 1 is provided with two grooves, and the two grooves are respectively located at the top and the bottom of the circular hole. The two fixing blocks 21 are respectively inserted into the inner cavities of the adjacent grooves. The two fixing blocks 21 are provided with a second cavity, and the right side wall of the second cavity is fitted with a trapezoidal block 22. The right sides of the two trapezoidal blocks 22 are fixedly connected with sliding The right side walls of the two second cavities are provided with a slide groove, and the two sliders are movably connected to the adjacent slide groove cavities. The two trapezoidal blocks 22 are fixedly connected with a positioning rod 23 on the side away from each other. The two second cavities are provided with a third through hole on the side away from each other. The two groove cavities are provided with a second blind hole on the side away from each other. The adjacent sides of the two trapezoidal blocks 22 are provided with a ball 24, and the left side of the ball 24 is fixedly connected with a second cross bar 25. The left sides of the two second cavities are provided with a fourth through hole. The two fixing plates 20 are provided with a A fifth through hole is provided, the left ends of the two second cross bars 25 respectively penetrate the adjacent fourth through hole and the fifth through hole inner cavity, and are fixedly connected with a moving block 26, the adjacent sides of the two moving blocks 26 are respectively fitted with the top and bottom of the protective cover 7, and the two moving blocks 26 are each provided with a third cavity, and the inner cavity of the third cavity is fitted with a second limiting block 27, and the two second limiting blocks 27 are each penetrated with a limiting rod 28, and the top and bottom of the two third cavities are each provided with a sixth through hole, and the top and bottom of the protective cover 7 are close to the right side. Two third blind holes are provided at each of the two positions, and the two third blind holes are arranged on the left and right sides. The adjacent ends of the two limit rods 28 respectively penetrate the adjacent sixth through-holes and are inserted into the adjacent third blind hole cavities. The ends of the two limit rods 28 that are far away respectively penetrate the adjacent sixth through-hole cavities and are fixedly connected with a ring 30. The outer sides of the two limit rods 28 are sleeved with a second spring 29, and the two ends of the second spring 29 are respectively fixedly connected to the second limit block 27 and the inner side wall of the third cavity, so as to facilitate the clamping, fixing and disassembly of the protective cover 7.

[0031] The limiting mechanism includes a limiting plate 38, and the limiting plate 38 is fitted and arranged at the bottom of the left side of the cover plate 9. A third cross bar 39 is fixedly connected to the right side of the limiting plate 38 near the bottom. A fourth cavity is opened at the bottom of the protective cover 7 near the left side, and a seventh through hole is opened on the left side of the fourth cavity. The right end of the third cross bar 39 passes through the inner cavity of the seventh through hole and is fixedly connected to a third limiting block 40. A third spring 41 is sleeved on the outer side of the third cross bar 39, and the left and right ends of the third spring 41 are respectively fixedly connected to the inner wall of the fourth cavity and the third limiting block 40. A baffle is fitted at the bottom of the right side of the cover plate 9, and the bottom of the baffle is fixedly connected to the bottom of the open inner cavity, so as to improve the dustproofness of the protective cover 7.

[0032] Working principle: When the present invention is in use, the two fixing blocks 21 are respectively inserted into the inner cavities of the two grooves, and the two rings 30 are pulled away from each other, so that the two limiting rods 28 are respectively separated from the inner cavities of the adjacent third blind holes, and the two moving blocks 26 are pushed to move to the right, thereby pushing the two balls 24 to move to the right, and the two balls 24 move to the right to squeeze the two trapezoidal blocks 22 away from each other, and drive the two positioning rods 23 away from each other, so that the two positioning rods 23 are respectively inserted into the inner cavities of the adjacent second blind holes, and after the rings 30 are loosened, the two The ends of the limiting rods 28 that are away from each other are respectively inserted into the inner cavities of the adjacent third blind holes, thereby fixing the protective cover 7 to the left side of the bearing body 5. The bearing body 5 is pressed and fixed by the setting of the two pressing plates 10, so as to realize quick disassembly and assembly of the bearing body 5, and the operation is convenient. When the sound sensor 13 detects an abnormal sound from the bearing body 5, the signal is transmitted to the controller 14, and the buzzer 15 is activated by the controller 14 to sound an audible alarm, thereby improving the staff, by pulling the limiting plate 38 to move to the left, and pulling the bottom of the cover plate 9 The first fixing ring 31 is rotated 90 degrees, and the left end of the first cross bar 37 is inserted into the adjacent first blind hole cavity, so that the end of the filling pipe 18 close to the cavity of the oil box 11 is deflected downward, and lubricating oil is added to the oil box 11 through the filling pipe 18, and the two electric push rods 16 are started, and the two electric push rods 16 jointly push the circular plate 17 to move to the right. , so that the lubricating oil in the oil box 11 is sprayed into the inner cavity of the bearing body 5 through a plurality of oil spray nozzles 12, and a plurality of second grips 34 are rotated to drive the hollow tube 19 to rotate, and the rotation of the hollow tube 19 drives the oil box 11 to rotate, so that the oil spraying is more uniform, thereby achieving the purpose of convenient maintenance of the bearing body 5, reducing the labor intensity of the staff and improving the work efficiency. In addition, through the setting of two heat dissipation ports and the dustproof net 8, the heat dissipation effect of the bearing body 5 is improved, and dust is prevented from entering the inner cavity of the protective cover 7, thereby improving the dustproof performance.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-bearing structure traction motor, comprising a housing (1), an inner cavity of the housing (1) being provided with a rotating shaft (2), a stator (3) being provided on the rotating shaft (2), and a rotor (4) being connected to the outer side of the stator (3). Features: A circular hole is provided at the middle position on the left side of the casing (1), and a bearing body (5) is provided on the left side of the inner cavity of the circular hole. Two retaining rings (6) are sleeved on the outer side of the bearing body (5), and the two retaining rings (6) are arranged on the left and right. A limiting ring is fixedly connected to the right side of the inner cavity of the circular hole, and the left side of the limiting ring is fitted with the adjacent retaining ring (6). The left end of the rotating shaft (2) is inserted into the inner cavity of the bearing body (5). A protective cover (7) is provided on the left side of the bearing body (5), and a clamping mechanism is provided between the protective cover (7) and the casing (1). An oil box (11) is provided in the inner cavity of the protective cover (7), and a plurality of oil nozzles (12) are inserted on the right side of the oil box (11). A circular plate (17) is fitted near the left side of the inner cavity of the oil box (11), and a first through hole is provided at the center of the circular plate (17). A refueling pipe (18) is provided through the inner cavity of the first through hole. A support plate is fixedly connected to the inner wall of the raised part of the protective cover (7), and a through hole is provided on the support plate. A hollow tube (19) is provided through the inner cavity of the through hole, and the right end of the hollow tube (19) is fixedly connected to the left side of the oil box (11), and one end of the refueling pipe (18) passes through the left side of the oil box (11) and the inner cavity of the hollow tube (19), and extends to the outside of the oil box (11). A squeezing mechanism is provided on the left side of the circular plate (17). An opening is provided on the left side of the protective cover (7), and a cover plate (9) is hingedly connected to the top of the inner cavity of the opening. A limiting mechanism is provided at the bottom of the left side of the cover plate (9). A sound sensor (13) and a controller (14) are fixedly connected to the top of the inner cavity of the protective cover (7) near the right side, and the controller (14) is located on the left side of the sound sensor (13). A buzzer (15) is fixedly connected to the top of the inner cavity of the protective cover (7) near the left side. The clamping mechanism comprises two fixing plates (20), and the two fixing plates (20) are respectively fixedly connected to the top and the right side of the bottom of the protective cover (7), and the right sides of the two fixing plates (20) are fixedly connected to fixing blocks (21), and the left side of the housing (1) is provided with two grooves, and the two grooves are respectively located at the top and the bottom of the circular hole, and the two fixing blocks (21) are respectively inserted into the inner cavities of adjacent grooves, and the two fixing blocks (21) are respectively provided with a second cavity, and the right side wall of the inner cavity of the second cavity is fitted with a trapezoidal block (22), and the right sides of the two trapezoidal blocks (22) are fixedly connected to sliders, and the right side walls of the two second cavities are provided with sliding grooves, and the two sliders are respectively movably connected to the inner cavities of adjacent sliding grooves, and the two A positioning rod (23) is fixedly connected to the side away from each other of the trapezoidal blocks (22), a third through hole is provided on the side away from each other of the two second cavities, a second blind hole is provided on the side away from each other of the two groove inner cavities, a ball (24) is provided on the adjacent side of the two trapezoidal blocks (22), and a second cross bar (25) is fixedly connected to the left side of the ball (24), a fourth through hole is provided on the left side of the two second cavities, a fifth through hole is provided on the two fixed plates (20), the left ends of the two second cross bars (25) respectively penetrate the adjacent fourth through hole and the fifth through hole inner cavity, and are fixedly connected to a moving block (26), and the adjacent sides of the two moving blocks (26) are respectively in contact with the top and bottom of the protective cover (7); A third cavity is provided on each of the two moving blocks (26), and a second limiting block (27) is fitted in the inner cavity of the third cavity. A limiting rod (28) is passed through each of the two second limiting blocks (27). A sixth through hole is provided on the top and bottom of each of the two third cavities. Two third blind holes are provided on the top and bottom of the protective cover (7) near the right side, and the two third blind holes are arranged on the left and right. Adjacent ends of the two limiting rods (28) pass through adjacent sixth through holes respectively and are plugged into adjacent inner cavities of the third blind holes. Distant ends of the two limiting rods (28) pass through adjacent inner cavities of the sixth through holes respectively and are fixedly connected to a ring (30). A second spring (29) is sleeved on the outer side of the two limiting rods (28), and two ends of the second spring (29) are fixedly connected to the second limiting block (27) and the inner wall of the third cavity respectively. The limiting mechanism comprises a limiting plate (38), and the limiting plate (38) is arranged at the left bottom of the cover plate (9), and a third cross bar (39) is fixedly connected to the right side of the limiting plate (38) near the bottom, and a fourth cavity is opened at the left side of the bottom of the protective cover (7), and a seventh through hole is opened on the left side of the fourth cavity. The right end of the third cross bar (39) passes through the inner cavity of the seventh through hole and is fixedly connected to a third limiting block (40). The outer side of the third cross bar (39) is sleeved with a third spring (41), and the left and right ends of the third spring (41) are respectively fixedly connected to the inner wall of the fourth cavity and the third limiting block (40).

2. A single-bearing structured traction motor according to claim 1, Features: The top and bottom of the protective cover (7) are both provided with heat dissipation openings, and the inner cavity of the heat dissipation openings is fixedly connected to a dustproof net (8).

3. The single-bearing structured traction motor according to claim 1, Features: The left top and bottom of the retaining ring (6) on the left side are fitted with pressure plates (10), and the sides of the two pressure plates (10) that are separated from each other are fixedly connected to the top and bottom of the inner cavity of the protective cover (7), respectively. The retaining ring (6) on the left side is provided with an eighth through hole near the top and bottom, and an insertion rod is penetrated through the inner cavity of the eighth through hole, and the left ends of the two insertion rods are fixedly connected to the adjacent pressure plates (10), respectively.

4. The single-bearing structured traction motor according to claim 1, Features: The extrusion mechanism comprises two electric push rods (16), and the two electric push rods (16) are respectively located on the left side of the circular plate (17) near the top and the bottom, the left ends of the two electric push rods (16) are fixedly connected to the left side wall of the inner cavity of the oil box (11), and the power ends of the two electric push rods (16) are fixedly connected to the left side of the circular plate (17).

5. The single-bearing structured traction motor according to claim 1, Features: A first fixing ring (31) is sleeved on the outer side of the refueling pipe (18) near the left end, and a plurality of first gripping rods (32) are fixedly connected to the outer side wall of the first fixing ring (31). First blind holes are opened on the right side of the first fixing ring (31) near the top and the bottom. A second fixing ring (33) is sleeved on the outer side of the hollow tube (19) near the left end, and a plurality of second gripping rods (34) are fixedly connected to the outer side wall of the second fixing ring (33). A first cavity is opened at the top, and a first spring (35) is fixedly connected to the right side wall of the first cavity, a first limit block (36) is fixedly connected to the left end of the first spring (35), and a first cross bar (37) is fixedly connected to the left side of the first limit block (36), a second through hole is opened on the left side of the first cavity, and the left end of the first cross bar (37) passes through the second through hole and is inserted into the adjacent first blind hole cavity, and a toggle ring is sleeved on the outer side of the first cross bar (37) near the left end.

6. The single-bearing structured traction motor according to claim 1, Features: A baffle is fitted at the bottom of the right side of the cover plate (9), and the bottom of the baffle is fixedly connected to the bottom of the open inner cavity.

7. The single-bearing structured traction motor according to claim 1, Features: The cross section of the oil box (11) when viewed from the right is circular, and the plurality of oil spray nozzles (12) are evenly distributed on the right side of the oil box (11), and the plurality of oil spray nozzles (12) are arranged in a circular array with the right side of the oil box (11) as the center.

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