Structure for controlling axial movement of oil bearing motor

Abstract

The utility model discloses a structure for controlling the axial movement of an oil bearing motor, which comprises a pressing plate, a bottom plate and a motor assembly, the left side and the right side between the pressing plate and the bottom plate are respectively provided with a guide post and guide sleeve assembly, the upper end of the bottom plate is provided with a lower base, the motor assembly is assembled on the lower base, the pressing plate is provided with a riveting head positioning plate, and the riveting head positioning plate is provided with a riveting head. A bolt is assembled between the riveting head positioning plate and the pressing plate, a riveting head and a pre-pressing plate are assembled on the riveting head positioning plate, the riveting head is arranged at the upper end of the motor assembly, displacement sensors are assembled at the positions, located on the two sides of the lower base, of the upper end of the bottom plate, and a pressing rod is assembled in the riveting head; the guide column and guide sleeve assembly comprises guide columns installed on the two sides of the upper end of the bottom plate and guide sleeves installed on the two sides of the lower end of the pressing plate. According to the structure for controlling the axial movement of the oil bearing motor, the pressure sensor is installed on the pressing plate, the pressure generated when the motor rear end cover and the motor shell are riveted through the riveting head is ensured, the lower base is installed on the bottom plate, and the pressing plate is connected with the bottom plate through the guide column and guide sleeve assembly.

Description

Technical Field

[0001] This patent relates to the technical field of permanent magnet oil-containing bearing motors, specifically a structure for controlling the axial movement of oil-containing bearing motors. Background Art

[0002] Currently, automotive blower motors typically use rolling bearings or oil-retaining bearings. Oil-retaining bearings offer advantages such as low cost, self-aligning, low noise, and excellent stability. Most blower motor manufacturers still prefer oil-retaining bearings. This is because oil-retaining bearings rely on an oil film formed within the bearing's inner bore to reduce friction between the motor's rotating shaft and the motor. However, an oil film is difficult to form in the axial direction, resulting in high friction. The current practice is to leave a gap in the axial direction, but controlling the gap size is a challenge, necessitating improvements to existing technology. Utility Model Content

[0003] The purpose of this patent is to provide a structure for controlling the axial movement of an oil-containing bearing motor to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, this patent provides the following technical solutions: a structure for controlling the axial movement of an oil-containing bearing motor, comprising a pressure plate, a base plate and a motor assembly, wherein guide column and guide sleeve assemblies are installed on both sides of the pressure plate and the base plate, the upper end of the base plate is equipped with a lower base, the motor assembly is assembled on the lower base, the pressure plate is equipped with a rivet head positioning plate, a bolt is installed between the rivet head positioning plate and the pressure plate, the rivet head and a pre-pressing plate are installed on the rivet head positioning plate, the rivet head is arranged at the upper end of the motor assembly, the upper end of the base plate is located on both sides of the lower base and is equipped with displacement sensors, a pressure rod is installed in the rivet head, the guide column and guide sleeve assembly includes guide columns installed on both sides of the upper end of the base plate and guide sleeves installed on both sides of the lower end of the pressure plate, and the guide sleeves are sleeved on the outside of the guide columns.

[0005] Preferably, the motor assembly includes a rotor assembly, a stator assembly and an end cover assembly, the rotor assembly includes a shaft, an insulating sleeve, and an oil deflector cup, and the stator assembly includes a bearing, which is assembled on the upper end of the end cover assembly through a bearing clamp.

[0006] Preferably, a hole is provided at the center of the insulating sheath, and a mounting portion is provided on the side wall of the oil deflector cup.

[0007] Preferably, the guide sleeve includes a guide seat a and a guide seat b that are arranged opposite to each other, and the inner walls of the guide seat a and the guide seat b are uniformly and equidistantly provided with rotation cavities along their axes, and balls are installed inside the rotation cavities.

[0008] Preferably, connecting plates are installed on both side outer walls of the guide seat a and the guide seat b, screw holes are opened on the side walls of the connecting plates, screws are installed inside the screw holes, and oil filling holes are opened on the outer walls of the guide seat a and the guide seat b.

[0009] Preferably, a circular groove is provided at the bottom end of the bolt, a bolt rod is installed at the bottom end of the circular groove, a fixing ring is installed at the outer upper end of the bolt rod, the circumferential surface of the bolt rod is covered with an annular pressure plate, a spring and an annular rubber sheet, and an extrusion block is installed at the upper end edge of the annular rubber sheet.

[0010] Preferably, the outer wall of the bolt is provided with an arc surface, and the surface of the arc surface is provided with anti-slip grooves.

[0011] Compared with the existing technology, the beneficial effects of this patent are: the structure for controlling the axial movement of the oil-containing bearing motor is simple in structure and easy to operate. A pressure sensor is installed on the pressure plate to ensure the pressure when the motor rear end cover and motor housing are riveted by the riveting head. The lower base is installed on the bottom plate, and the pressure plate and bottom plate are connected by a guide column and guide sleeve assembly. The lower base plays a positioning role, ensuring that the motor assembly is accurately positioned on the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of this patent;

[0013] Figure 2 This is a schematic diagram of the motor assembly of this patent;

[0014] Figure 3 This is a schematic diagram of the guide column and guide seat of this patent;

[0015] Figure 4 This is a schematic diagram of the bolt of this patent.

[0016] In the figure: 1 pressure plate, 2 base plate, 3 guide column and guide sleeve assembly, 31 guide seat a, 32 guide column, 33 guide seat b, 4 lower base, 5 rivet pressure head positioning plate, 6 pre-pressure plate, 7 rivet pressure head, 8 displacement sensor, 9 pressure rod, 10 motor assembly, 11 bearing, 12 shaft, 13 end cover assembly, 14 stator assembly, 15 insulating sleeve, 16 oil baffle cup, 17 bearing, 18 bolt, 181 bolt rod, 182 annular rubber sheet, 183 bolt rod, 184 extrusion block, 185 annular pressure sheet, 186 fixing ring, 188 arc surface, 19 hole, 20 mounting part, 21 rotor assembly, 22 connecting plate, 23 ball, 24 rotating cavity, 25 oil filling hole, 26 screw hole, 27 rotor assembly. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Obviously, the embodiments described are only part of the embodiments of this patent, not all of them. Based on the embodiments of this patent, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this patent.

[0018] See also Figures 1 to 4 This patent provides a technical solution: a structure for controlling the axial movement of an oil-containing bearing motor, comprising a pressure plate 1, a base plate 2 and a motor assembly 10, wherein guide pin and guide sleeve assemblies 3 are installed on both sides between the pressure plate 1 and the base plate 2, a lower base 4 is installed on the upper end of the base plate 2, and the motor assembly 10 is installed on the lower base 4, a rivet head positioning plate 5 is installed on the pressure plate 1, a bolt 18 is installed between the rivet head positioning plate 5 and the pressure plate 1, and a rivet head 7 and a pre-pressing plate 6 are installed on the rivet head positioning plate 5 The rivet head 7 is mounted on the upper end of the motor assembly 10. Displacement sensors 8 are installed on both sides of the lower base 4, located at the upper end of the base plate 2. A pressure rod 9 is installed within the rivet head 7. The guide post and guide sleeve assembly 3 includes guide posts 32 mounted on both sides of the upper end of the base plate 2 and guide sleeves mounted on both sides of the lower end of the pressure plate 1. The guide sleeves are connected to the outer surfaces of the guide posts 32. This structure mainly consists of 17 components. 1-9 are the process mechanisms for riveting the motor and generating axial play. 10 represents a product with a small tolerance for axial play. A pressure sensor is installed on the pressure plate 1 to ensure the pressure applied by the rivet head 7 to the motor rear end cover 13 and the motor housing 14. The lower base 4 is mounted on the base plate 2, and the pressure plate 1 and base plate 2 are connected via the guide post and guide sleeve assembly 3. The lower base 4 serves as a positioning mechanism, ensuring the accurate positioning of the motor assembly 10 on the tooling. The rivet head positioning plate 5 is bolted to the pressure plate 1 and positions the rivet head 7 and the pre-load plate 6.

[0019] The motor assembly 10 includes a rotor assembly 27, a stator assembly 14, and an end cap assembly 13. The rotor assembly 27 includes a shaft 12, an insulating sheath 15, and an oil deflector cup 16. The stator assembly 14 includes a bearing 17, which is mounted on the upper end of the end cap assembly 13 via a bearing clamp. The motor assembly 10 primarily consists of the rotor assembly 27, the stator assembly 14, and the end cap assembly 13. The rotor assembly primarily comprises the shaft 12, the insulating sheath 15, the oil deflector cup 16, and other components, and is secured by the shaft 12. The stator assembly 14 primarily comprises components such as the bearing 17. The bearing 11 is pressed into the oil-containing bearing chamber of the end cap 13 via the bearing clamp.

[0020] A hole 19 is formed at the center of the insulating sheath 15 , and a mounting portion 20 is formed on the side wall of the oil deflector cup 16 .

[0021] The guide sleeve includes a guide seat a31 and a guide seat b33 that are relatively arranged. The inner walls of the guide seats a31 and b33 are evenly and equidistantly provided with rotation cavities 24 along their axis. Balls 23 are installed inside the rotation cavity 24. After the guide seats a31 and b22 are combined, they can move outside the guide column 32, thereby realizing the up and down movement of the pressure plate 1.

[0022] The outer walls of both sides of the guide seat a31 and the guide seat b33 are installed with connecting plates 21, the side walls of the connecting plates 21 are provided with screw holes 26, and the screw holes 26 are installed inside with screw rods 22. The outer walls of the guide seats a31 and the guide seats b33 are provided with oil filling holes 25, and are installed by threaded connection.

[0023] A circular groove 181 is provided at the bottom end of the bolt 18, and a bolt rod 183 is installed at the bottom end of the circular groove 181. A fixing ring 186 is installed at the outer upper end of the bolt rod 183. The circumferential surface of the bolt rod 183 is covered with an annular pressing piece 185, a spring 187 and an annular rubber sheet 182. An extrusion block 184 is installed at the upper end edge of the annular rubber sheet 182, so that the annular pressing piece 185 is squeezed downward due to the action of the spring 187, and the extrusion block 184 is squeezed downward due to the action of the annular pressing piece 185, so that the extrusion block 184 further squeezes the edge of the annular rubber sheet 182, thereby improving the sealing effect.

[0024] The outer wall of the bolt 18 is provided with an arc surface 188 , and the surface of the arc surface 188 is provided with anti-slip grooves, and the arrangement of the arc surface 188 facilitates driving the bolt 18 .

[0025] Working process and principle: During operation, the pre-load plate 6 pushes the rear end cover 13 of the motor downward during the downward movement of the tooling. The rear end cover 13 pushes the rotor component 18 downward through the oil-containing bearing 11. Under the support of the bearing 17, the part 20 of the oil baffle cup 16 is inserted into the hole 19 of the rotor insulating sleeve 15. When the riveting of the rear end cover 13 of the motor and the casing 14 is completed, the axial movement of the motor rotor is 0. At this time, the pressure rod 9 moves downward and touches the motor shaft 12. When the pressure sensor installed on the pressure rod 9 meets the pressure condition, it issues a command to let the displacement sensor 8 start counting, and the pressure rod 9 pushes the rotor 18 downward. After the displacement reaches 0.2, the pressure rod 9 stops moving, thereby ensuring that the axial movement of the motor is around 0.2, which is a good way to control the axial movement of the motor.

[0026] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that this patent can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of this patent is defined by the appended claims rather than the foregoing description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be encompassed within this patent. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0027] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A structure for controlling the axial movement of an oil-containing bearing motor, comprising a pressure plate (1), a base plate (2) and a motor assembly (10), characterized in that: The left and right sides between the pressure plate (1) and the base plate (2) are both equipped with guide column and guide sleeve assemblies (3), the upper end of the base plate (2) is equipped with a lower base (4), the motor assembly (10) is equipped on the lower base (4), the pressure plate (1) is equipped with a rivet head positioning plate (5), a bolt (18) is installed between the rivet head positioning plate (5) and the pressure plate (1), the rivet head positioning plate (5) is equipped with a rivet head (7) and a pre-pressing plate (6), the rivet head (7) is arranged at the upper end of the motor assembly (10), the upper end of the base plate (2) is located on both sides of the lower base (4) and is equipped with displacement sensors (8), the rivet head (7) is equipped with a pressure rod (9), the guide column and guide sleeve assembly (3) includes guide columns (32) installed on both sides of the upper end of the base plate (2) and guide sleeves installed on both sides of the lower end of the pressure plate (1), and the guide sleeves are sleeved on the outside of the guide columns (32).

2. The structure for controlling the axial movement of an oil-containing bearing motor according to claim 1, characterized in that: The motor assembly (10) includes a rotor assembly (27), a stator assembly (14), and an end cover assembly (13); the rotor assembly (27) includes a shaft (12), an insulating sleeve (15), and an oil retaining cup (16); the stator assembly (14) includes a bearing (17); and the bearing (17) is assembled on the upper end of the end cover assembly (13) through a bearing clamp.

3. The structure for controlling the axial movement of an oil-containing bearing motor according to claim 2, characterized in that: A hole (19) is provided at the center of the insulating sheath (15), and a mounting portion (20) is provided on the side wall of the oil retaining cup (16).

4. The structure for controlling the axial movement of an oil-containing bearing motor according to claim 1, characterized in that: The guide sleeve comprises a guide seat a (31) and a guide seat b (33) which are arranged opposite to each other. The inner walls of the guide seat a (31) and the guide seat b (33) are provided with rotating cavities (24) evenly and equidistantly along their axes. Balls (23) are installed inside the rotating cavities (24).

5. The structure for controlling the axial movement of an oil-containing bearing motor according to claim 4, characterized in that: Connecting plates (21) are installed on both sides of the outer walls of the guide seat a (31) and the guide seat b (33). The side walls of the connecting plates (21) are provided with screw holes (26). The screw holes (26) are provided with screw rods (22). The outer walls of the guide seat a (31) and the guide seat b (33) are provided with oil filling holes (25).

6. The structure for controlling the axial movement of an oil-containing bearing motor according to claim 1, characterized in that: A circular groove (181) is formed at the bottom end of the bolt (18), a bolt rod (183) is mounted at the bottom end of the circular groove (181), a fixing ring (186) is mounted on the outer upper end of the bolt rod (183), an annular pressing plate (185), a spring (187) and an annular rubber sheet (182) are mounted on the circumferential surface of the bolt rod (183), and an extrusion block (184) is mounted at the upper edge of the annular rubber sheet (182).

7. The structure for controlling the axial movement of an oil-containing bearing motor according to claim 1, characterized in that: The outer wall of the bolt (18) is provided with an arc surface (188), and the surface of the arc surface (188) is provided with anti-slip grooves.

Images