A flexible pressing head device for assembling a three-in-one motor rotor

Abstract

The present invention discloses a flexible pressing head device for assembling a three-in-one motor rotor, which is used for press-fitting a bearing and a rotor shaft in a housing workpiece. The device comprises a slide base, an oil-free bushing mounting seat, a pressing rod, a pressing head connecting piece, a pressing head, and a guiding rod. The guiding rod extends out of the pressing head and can elastically float. An axial floating structure is provided between the pressing rod and the oil-free bushing mounting seat. A plurality of supporting blocks and a plurality of clamping mechanisms are further arranged on the slide base. Wherein, the pressing rod is driven by an external power execution component to move downward to the press-fitting position. During this process, the top end of the guiding rod first engages with the center hole of the rotor shaft to align the rotor shaft. When the housing workpiece encounters an obstacle from the rotor shaft during the downward movement, it can float upward, and its bearing can float to a position in contact with the pressing head. In this device, the press-fitting mechanism and the clamping mechanism can achieve floating in the axial direction, solving the problem of press-fitting the bearing and the rotor shaft in the housing workpiece.

Description

Technical Field

[0001] The present invention relates to a flexible pressing head device for assembling a three-in-one motor rotor into a housing. Background Art

[0002] With the booming development of new energy vehicles, the demand for the output of motors is increasing day by day, and among them, the three-in-one motor is increasingly favored. The three-in-one motor refers to a technology that integrates an electric control unit, a motor, and a reducer. With the continuous evolution of electric vehicle technology, integrated design will undoubtedly become the future development trend.

[0003] Domestic manufacturers are also involved in this field, but high integration will lead to an increase in the difficulty of assembly. For example, when assembling a three-in-one motor rotor into a housing, since the bearing has been press-fitted into the housing, and then the bearing that has been pressed into the housing is press-fitted onto the rotor shaft, it is impossible to use the bearing for positioning and supporting the inner ring of the bearing to press the bearing into the rotor shaft like ordinary bearing press-fitting.

[0004] The bearing here has been pressed into the housing. In the prior art, ordinary press-fitting methods and special press-fitting methods such as floating press heads that use the bearing for positioning cannot meet this press-fitting situation. Summary of the Invention

[0005] The purpose of the present invention is to provide a flexible pressing head device for assembling a three-in-one motor rotor into a housing to solve the problem of press-fitting the bearing in the housing workpiece and the rotor shaft in the assembly of the three-in-one motor.

[0006] To this end, the present invention provides a flexible pressing head device for press-fitting the bearing of a housing workpiece relative to a rotor shaft, including a slide base, an oil-free bushing mounting seat, a pressing rod, a pressing head connecting piece, a pressing head, and a guide rod. The pressing head is in a sleeve shape, the guide rod extends from the pressing head and can elastically float. The slide base is arranged on an external vertical guide rail so as to be able to freely lift and lower. An axial floating structure is provided between the pressing rod and the oil-free bushing mounting seat. A plurality of support blocks and a plurality of clamping mechanisms are also arranged on the slide base. The plurality of support blocks are used for positioning and supporting the housing workpiece, and the plurality of clamping mechanisms are used for multi-point clamping of the outer periphery of the housing workpiece. Among them, the pressing rod is driven by an external power execution component to move downward to the press-fitting position. During this process, the top end of the guide rod first engages with the center hole of the rotor shaft to align the rotor shaft. When the housing workpiece encounters an obstacle from the rotor shaft during the downward movement, it can float upward, and its bearing can float to a position in contact with the pressing head.

[0007] In this device, the press-fitting mechanism and the clamping mechanism can achieve floating in the axial direction, solving the problem of press-fitting the bearing in the housing workpiece and the rotor shaft.

[0008] In addition to the purposes, features, and advantages described above, the present invention has other purposes, features, and advantages. The present invention will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0010] Figure 1 is the front view of the three-in-one motor rotor casing flexible pressing head device according to the present invention;

[0011] Figure 2 is the sectional view of the three-in-one motor rotor casing flexible pressing head device according to the present invention;

[0012] Figure 3 is the rear view of the three-in-one motor rotor casing flexible pressing head device according to the present invention;

[0013] Figure 4 is the three-dimensional structural schematic diagram of the lever clamping mechanism according to the present invention;

[0014] Figure 5 is the sectional view of the lever clamping mechanism according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0016] Figures 1 to 5 Illustrates some embodiments according to the present invention.

[0017] With reference to Figures 1 to 3 , the three-in-one motor rotor casing flexible pressing head device of the present invention is used for the press-fitting work of the bearing in the housing workpiece relative to the rotor shaft. This device includes a slide base 1, an oil-free bushing mounting seat 4, a pressing rod 6, a pressing head connector 10, a pressing head 12, a guiding rod 13, and several lever clamping mechanisms 2.

[0018] The slide base 1 is arranged on an external vertical guide rail (not shown in the figure) so as to be able to freely lift, for example, installed on the vertical guide rail of the press-fitting equipment.

[0019] The oil-free bushing mounting seat 4 is fixed on the slide base 1, and the limit disc 5 is fixed on the pressure rod 6. The oil-free bushing 8 and the snap ring 9 are both installed in the oil-free bushing mounting seat 4. The pressure head connecting piece 10 is fixed on the pressure rod 6. The spring 11 is placed between the pressure head connecting piece 10 and the guide rod 13. The pressure head 12 is installed on the pressure head connecting piece 10. The bearing 3.1 is located inside the workpiece 3.

[0020] The pressure rod 6 is driven by an external power execution component. The connection between the pressure rod 6 and the interface of the oil cylinder rod of an external power execution component such as a hydraulic cylinder is a quick-release structure.

[0021] The pressure head 12 is in a sleeve shape. The upper end of the guide rod 13 is located in the spring seat cavity 6.2. The guide rod 13 extends out of the pressure head and can elastically float. The top end of the guide rod 13 can be combined with the center hole (i.e., the self-provided process hole) of the rotor shaft 16 when moving downward to align the rotor shaft.

[0022] A limit seat 6.1 is formed at the lower end of the pressure rod 6, and the oil-free bushing mounting seat 4 forms a mating seat hole. In this way, the oil-free bushing mounting seat 4 is hung on the pressure rod 6 and can axially float on the pressure rod 6, and the limit disc 6 on the pressure rod 6 limits the axial floating position of the oil-free bushing mounting seat 4.

[0023] Four lever clamping structures 2 are arranged on the slide base 1, and the four lever clamping structures 2 clamp the workpiece 3.

[0024] The support block 7, the support block 15, and the support rod 14 are all installed on the slide base 1 and contact the workpiece 3.

[0025] The lever clamping structure 2 is installed on the slide base 1 through the mounting seat 2.3. The cylinder seat 2.2 is connected to the mounting seat 2.3. The cylinder 3.1 is installed on the cylinder seat 2.2. The cylinder joint 2.4 is connected to the inside 2.1 of the cylinder. The cylinder joint 2.4 connects one end of the lever arm 2.5, and the driven arm 2.6 is connected between the cylinder seat 2.2 and the lever arm 2.5. The lever clamping mechanism is used to clamp the housing workpiece, and the lever action can be used to output a larger clamping force with a smaller force.

[0026] The pressing block 2.7 is connected to the lever arm 2.5 by three equal-height screws 2.9. Steel balls 2.8 are placed between the lever arm 2.5 and the pressing block 2.7. Specifically, the steel balls 2.8 are buried at the combined center position of the pressing block and the lever arm, and the three equal-height screws have a clearance fit with the pressing block.

[0027] The pressing here adopts a floating adaptive structure, which has a good adaptive effect on clamping the rough surface. In this way, the problem that the surface of the workpiece housing is a rough surface and cannot fit perfectly during clamping can be solved.

[0028] The present invention is used for the assembly of the rotor and the housing, and its working process is as follows:

[0029] (1) The lever clamping mechanism in the indenter structure clamps the housing workpiece. Among them, the four lever clamping structures 2 on the slide base 1 clamp the housing workpiece 3. Among them, the rotor shaft 16 is positioned with the rotor, and the planar position and height position are fixed and unchanged.

[0030] (2) The flexible indenter structure moves downward, and the guide rod 13 aligns the rotor shaft 16. Among them, the entire slide base 1 moves downward, and the guide rod 13 is compressed upward by the rotor shaft 16, and at the same time, the rotor shaft 16 is aligned.

[0031] (3) The flexible indenter structure moves downward to the bearing pressing position inside the housing. Due to the force exerted by the rotor shaft on the bearing inside the housing, the housing clamping structure moves upward relative to the pressing structure, and the indenter of the pressing structure contacts the inner ring of the bearing inside the housing. Among them, when the bearing 3.1 inside the workpiece 3 contacts the rotor shaft 16, relative sliding occurs between the pressure rod 6 and the oil-free bushing mounting seat 4, and at this time, the indenter 12 contacts the bearing 3.1 inside the workpiece 3.

[0032] (4) The indenter of the pressing structure presses the bearing into the rotor shaft. Among them, force acts on the bearing 3.1 to press the bearing 3.1 onto the rotor shaft 16.

[0033] In this device, the pressing mechanism and the clamping mechanism can achieve floating axially, solving the problem of pressing the bearing and the rotor shaft in the housing workpiece. At the same time, it can solve the pressing problems such as the axial clamping point and the pressing point not being on the same plane.

[0034] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flexible pressing head device for a three-in-one motor rotor casing, which is used for press-fitting the bearing of a housing workpiece relative to a rotor shaft, and is characterized in that It includes a slide base, an oil-free bushing mounting seat, a pressure rod, a press head connector, a press head, and a guide rod. The oil-free bushing mounting seat is fixedly connected to the slide base. The press head is fixedly connected to the lower end of the press head connector, and the press head connector is fixedly connected to the lower end of the pressure rod. The press head is in a sleeve shape. The guide rod extends out of the press head and can elastically float. The slide base is arranged on an external vertical guide rail so as to be able to freely lift and lower. An axial floating structure is provided between the pressure rod and the oil-free bushing mounting seat. The axial floating structure includes a limit disk arranged on the pressure rod and a limit seat located below. Wherein, the oil-free bushing mounting seat is sleeved on the pressure rod and sits on the limit seat, and the limit disk is used to limit the axial floating position of the oil-free bushing mounting seat. A plurality of support blocks and a plurality of clamping mechanisms are further arranged on the slide base. The plurality of support blocks are used to position and support the housing workpiece, and the plurality of clamping mechanisms are used to perform multi-point clamping on the outer circumference of the housing workpiece. The clamping mechanism is a lever clamping mechanism, which includes a cylinder, a cylinder seat, a cylinder joint, a lever arm, a driven arm, and a pressing block. Wherein, the cylinder joint is hinged to the first end of the lever arm, the pressing block is arranged at the second end of the lever arm, and the driven arm is connected between the cylinder seat and the lever arm. Wherein, when the cylinder joint extends out, the lever arm is in a posture of horizontally pressing against the outer shell workpiece. A floating adaptive structure is provided between the pressing block and the lever arm. The floating adaptive structure includes a steel ball and a plurality of equal-height screws distributed with the steel ball as the center. Wherein, the steel ball is buried at the combined center position of the pressing block and the lever arm, and the equal-height screws are in clearance fit with the pressing block. Wherein, the pressure rod is driven by an external power execution component to move down to the pressing position. In this process, the top end of the guide rod first combines with the center hole of the rotor shaft to align the rotor shaft. When the outer shell workpiece encounters an obstacle from the rotor shaft during the downward movement, it can float upward, and its bearing can float to a position in contact with the press head.

2. The three-in-one motor rotor combined box flexible pressure head device according to claim 1, characterized in that, A spring seat cavity is provided in the press head connector. One end of the guide rod is located in the spring seat cavity, and a spring for biasing the guide rod is provided in the spring seat cavity.

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