CN115319445B

CN115319445B - Positioning guide device

Info

Publication number: CN115319445B
Application number: CN202110505503.4A
Authority: CN
Inventors: 江彪; 郁李巍; 王全任; 钟毅; 尹建民; 李佳奕; 韦彬; 陈伟; 鲍爱建
Original assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2024-04-09
Anticipated expiration: 2041-05-10
Also published as: CN115319445A

Abstract

The invention provides a positioning guide device for the assembly positioning guide of a motor shaft assembly of a gearbox of a hybrid electric vehicle and a motor stator, wherein the positioning guide device is provided with a bottom plate, a lifting shaft and a guide shaft, the bottom plate is fixed on a base for bearing the positioning guide device through bolts, the lifting shaft is connected with the bottom plate, the guide shaft is fixedly connected with the lifting shaft and can adjust the axial height of the guide shaft through the lifting shaft, the guide shaft comprises a first section and a second section, the first section of the guide shaft is in clearance fit with an assembly hole formed on the gearbox shell during positioning guide, and the second section of the guide shaft passes through and protrudes beyond an inner hole of the motor shaft assembly during positioning guide and is in clearance fit with the inner hole of the motor shaft assembly.

Description

Positioning guide device

Technical Field

The invention relates to a positioning and guiding device, in particular to a positioning and guiding device for positioning and guiding the assembly of a motor shaft assembly and a motor stator of a hybrid electric vehicle gearbox.

Background

With the development of automobile technology, the functions of a gearbox of a hybrid electric vehicle are becoming more powerful, and structures with more compact and effective composite functions are being widely used in gearboxes of hybrid electric vehicles to control the volume of the gearbox while increasing the functions of the gearbox. Accordingly, the motor in the gearbox typically employs a form of securing the stator to the gearbox housing and assembling the motor shaft assembly to the housing to assemble the motor shaft assembly with the motor stator. And because the motor rotor on the motor shaft assembly is a permanent magnet, a great magnetic interaction force exists between the motor rotor and the motor stator, so that the accurate assembly of the motor shaft assembly and the motor stator is affected.

In the prior art, the motor is assembled by adopting a three-section type shell, firstly, a motor stator is installed in a middle shell, then, a motor shaft assembly is installed in a front shell, and finally, the motor is assembled. In an assembly using a three-piece housing, the housing is typically large in size.

Disclosure of Invention

The technical problem to be solved by one aspect of the present invention is how to ensure high-precision assembly of a motor shaft assembly and a motor stator in the case of using a two-section housing. In the case of the two-part housing assembly, the gearbox is composed of two housings, which are fastened by means of bolts, the interior of the housing being used for mounting further components. The concrete implementation mode is to mount other parts such as a shaft, a bearing, a motor, a gear shifting mechanism, electric control hardware and the like on one of the shells, and then to close the other shell with the shell, and to connect the other shell with the shell through bolts. The three-section shell is composed of three shells, parts are often mounted on a middle shell, a front shell and a rear shell respectively, and then the shells are combined and connected through bolts. The three-section type shell is adopted, so that a size chain is long, and the requirement of high-precision positioning of the motor is difficult to meet.

In addition, other aspects of the present invention are directed to solving or alleviating other technical problems of the prior art.

The present invention provides a positioning guide, in particular, according to an aspect of the present invention, there is provided:

a positioning guide device is used for positioning guide of assembly of a motor shaft assembly and a motor stator of a hybrid electric vehicle gearbox, wherein the positioning guide device is provided with a bottom plate, a lifting shaft and a guide shaft, the bottom plate is fixed on a base for bearing the positioning guide device through bolts, the lifting shaft is connected with the bottom plate, the guide shaft is fixedly connected with the lifting shaft, the axial height of the guide shaft can be adjusted through the lifting shaft, the guide shaft comprises a first section and a second section, the first section of the guide shaft is in clearance fit with an assembly hole formed in a gearbox shell during positioning guide, and the second section of the guide shaft penetrates through and protrudes beyond an inner hole of the motor shaft assembly during positioning guide and is in clearance fit with the inner hole of the motor shaft assembly.

Alternatively, according to one embodiment of the present invention, an external thread is formed on the elevation shaft, and an internal thread is formed on the base plate to be engaged with the external thread, and the axial height of the elevation shaft is changed by screwing the elevation shaft screwed to the base plate.

Alternatively, according to an embodiment of the present invention, a through hole is formed in the base plate, the lift shaft passes through the through hole and moves up and down in the through hole, and a screw hole extending from the through hole to a side of the base plate perpendicular to an axial direction of the lift shaft is formed in the base plate, in which a bolt is installed for restricting axial movement of the lift shaft in the through hole.

Alternatively, according to one embodiment of the invention, a first flange and a second flange are respectively formed at the end of the lifting shaft connected to the guide shaft and at the end of the guide shaft connected to the lifting shaft, and the first flange and the second flange are connected to each other by bolts.

Alternatively, according to one embodiment of the invention, 6 threaded holes are respectively formed on the first flange and the second flange, which are uniformly arranged in the circumferential direction.

Alternatively, according to an embodiment of the present invention, the elevation shaft and the guide shaft are connected to each other by a sleeve.

Alternatively, according to one embodiment of the invention, the first section of the guide shaft maintains a clearance fit of 0.1-0.2 mm with the mounting hole formed in the transmission housing and the second section of the guide shaft maintains a clearance fit of 0.15-0.3 mm with the inner bore of the motor shaft assembly.

The invention has the advantages that: according to the positioning guide device disclosed by the invention, the high-precision assembly of the motor shaft assembly and the motor stator can be effectively ensured, the assembly efficiency and the assembly quality are improved, shells with different axial lengths can be matched through the design of the lifting shaft, the application range is wide, and the economy is good.

Drawings

The above and other features of the present invention will become apparent with reference to the accompanying drawings, in which,

figure 1 shows a schematic structural view of a positioning guide according to one embodiment of the present invention,

fig. 2 shows a schematic assembly of the components when positioning and guiding using the positioning and guiding device according to an embodiment of the present invention.

Detailed Description

It is to be understood that, according to the technical solution of the present invention, those skilled in the art may propose various structural manners and implementation manners that may be replaced with each other without changing the true spirit of the present invention. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit the invention to the precise form disclosed.

Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," "third," and the like are used for descriptive and distinguishing purposes only and are not to be construed as indicating or implying a relative importance of the corresponding components.

Referring to fig. 1, there is shown a schematic structural view of a positioning guide according to an embodiment of the present invention. The positioning guide device is used for assembling a motor shaft assembly and a motor stator of a hybrid electric vehicle gearbox, and is particularly used for assembling the motor shaft assembly and the motor stator under the condition that the gearbox adopts a two-section shell assembly form. The positioning guide device plays a role in pre-positioning the motor shaft assembly and the motor stator in practice during assembly so as to improve the assembly precision on the basis of overcoming the magnetic force between the motor rotor and the stator, and can be taken off from the gearbox after the assembly is completed.

The positioning guide comprises a base plate 10, a lifting shaft 20 and a guide shaft 30, which comprises a first section 301 and a second section 302. The base plate 10 can be fastened by means of bolts 50 to a base 60 for carrying a positioning guide, an external thread being formed on the lifting shaft 20, and an internal thread being formed on the base plate 10, which engages with the external thread. The lifting shaft 20 can be screwed at one end into the base plate 10 and the axial height of the lifting shaft 20 can be adjusted by screwing to match gearbox housings having different axial heights. A first flange 201 is formed at the other end portion of the elevation shaft 20, and a second flange 303 is formed at the lower end portion of the guide shaft 30, 6 screw holes are uniformly formed on the first flange 201 and the second flange 303 in the circumferential direction, and the first flange 201 and the second flange 303 are connected to each other through the screw holes by 6 bolts 40, thereby securing strength and accuracy of connection.

In an embodiment not shown, no screw thread is formed on the lift shaft 20, but a through hole is formed on the base plate 10, the lift shaft 20 is movable up and down in the through hole, and a screw hole extending from the through hole to one side of the base plate 10 perpendicular to the axial direction of the lift shaft 20 is formed in the base plate 10. In which a bolt is mounted, which can be screwed against the lifting shaft 20 in order to fix the axial position of the lifting shaft 20 when the lifting shaft 20 is adjusted to a suitable position.

In an embodiment not shown, the lifting shaft 20 and the guide shaft 30 can also be connected to each other by a sleeve.

Referring to fig. 2, there is shown an assembly schematic of the components when performing positioning guidance using the positioning guidance apparatus according to one embodiment of the present invention. In fig. 2, the base plate 10 is first fixed to the base 60 by the bolts 50, then the lift shaft 20 and the guide shaft 30 are connected by the bolts 40 and the lift shaft 20 is mounted in the screw hole of the base plate 10, and the guide shaft 30 is inserted into the inner hole of the motor shaft assembly 70 through the fitting hole configured on the transmission housing 90 exclusively for the positioning guide. The height of the guide shaft 30 is adjusted to a proper height by screwing the elevating shaft 20, i.e., the guide shaft 30 protrudes from the inner hole of the motor shaft assembly 70 and is higher than the upper top surface 10 mm of the motor shaft assembly 70. The guide shaft 30 should be configured such that at this height, the first section 301 of the guide shaft 30 maintains a clearance fit of 0.1-0.2 mm with the mounting hole and the second section 302 of the guide shaft 30 maintains a clearance fit of 0.15-0.3 mm with the inner bore of the motor shaft assembly 70, thereby ensuring a high precision assembly of the motor shaft assembly 70 with the motor stator 80 and the transmission housing 90. After assembly in place, the motor shaft assembly 70 is secured by bolts and the bolted connection of the base plate 10 to the base 60 is released, and the positioning guide is then removed from the gearbox, thereby eventually completing the assembly.

It should be understood that all of the above preferred embodiments are exemplary and not limiting, and that various modifications or variations of the above-described specific embodiments, which are within the spirit of the invention, should be made by those skilled in the art within the legal scope of the invention.

Claims

1. The utility model provides a location guider for the motor shaft assembly of hybrid vehicle gearbox and the location direction of the assembly of motor stator, its characterized in that, location guider has bottom plate, lift axle and guiding axle, and the bottom plate passes through the bolt fastening on the base that is used for bearing location guider, and the lift axle is connected with the bottom plate, and guiding axle and lift axle fixed connection and can adjust the axial height of guiding axle through the lift axle, and the guiding axle includes first section and second section, and the first section of guiding axle passes and outstanding more than the hole of motor shaft assembly and with the hole clearance fit of motor shaft assembly when location direction with the pilot hole that constructs on the gearbox casing.

2. The positioning guide according to claim 1, wherein an external thread is formed on the elevation shaft, and an internal thread is formed on the base plate to be engaged with the external thread, and an axial height of the elevation shaft is changed by screwing the elevation shaft screwed to the base plate.

3. Positioning guide according to claim 1, characterized in that a through-hole is constructed in the base plate, through which the lifting shaft passes and moves up and down in the through-hole, and that a threaded hole extending from the through-hole to the side of the base plate perpendicularly to the axial direction of the lifting shaft is constructed in the base plate, in which threaded hole a bolt is mounted for limiting the axial movement of the lifting shaft in the through-hole.

4. A positioning and guiding device according to any one of claims 1 to 3, characterized in that a first flange and a second flange are respectively constructed at the end of the lifting shaft connected to the guiding shaft and at the end of the guiding shaft connected to the lifting shaft, the first flange and the second flange being connected to each other by bolts.

5. The positioning guide according to claim 4, wherein 6 screw holes uniformly arranged in a circumferential direction are respectively formed on the first flange and the second flange.

6. A positioning guide as claimed in any one of claims 1 to 3, wherein the lifting shaft and the guide shaft are connected to each other by a sleeve.

7. The positioning guide of claim 1, wherein the first section of the guide shaft maintains a clearance fit of 0.1-0.2 mm with the mounting hole formed in the transmission housing and the second section of the guide shaft maintains a clearance fit of 0.15-0.3 mm with the inner bore of the motor shaft assembly.