CN113770689A - Flexible engine shaft and intermediate shaft bearing press-fitting device - Google Patents

Flexible engine shaft and intermediate shaft bearing press-fitting device Download PDF

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Publication number
CN113770689A
CN113770689A CN202111108700.9A CN202111108700A CN113770689A CN 113770689 A CN113770689 A CN 113770689A CN 202111108700 A CN202111108700 A CN 202111108700A CN 113770689 A CN113770689 A CN 113770689A
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CN
China
Prior art keywords
pressure head
press
bearing
engine shaft
shaft bearing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111108700.9A
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Chinese (zh)
Inventor
章毅
曲永峰
李荡
彭勃
李维虎
杨兵
付博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhixin Technology Co Ltd
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Zhixin Technology Co Ltd
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Filing date
Publication date
Application filed by Zhixin Technology Co Ltd filed Critical Zhixin Technology Co Ltd
Priority to CN202111108700.9A priority Critical patent/CN113770689A/en
Publication of CN113770689A publication Critical patent/CN113770689A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/02Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
    • B23P19/027Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/001Article feeders for assembling machines
    • B23P19/006Holding or positioning the article in front of the applying tool

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)

Abstract

The invention provides a flexible engine shaft and intermediate shaft bearing press-fitting device which comprises a pressure head assembling mechanism, a vertical moving mechanism and a transverse moving mechanism, wherein the pressure head assembling mechanism comprises a plurality of pressure head assembly bodies, and the pressure head assembly bodies are used for press-fitting an engine shaft bearing and an intermediate shaft bearing; the vertical moving mechanism comprises a mounting seat and a plurality of pressure head cylinders, and the pressure head cylinders are respectively in corresponding driving connection with the corresponding assembly bodies and are respectively used for driving the corresponding assembly bodies to move up and down; the transverse moving mechanism comprises a welding frame and a servo motor, and the servo motor is in driving connection with the mounting seat and used for driving the mounting seat to transversely move. According to the flexible press-fitting device for the engine shaft and the intermediate shaft bearing, the vertical moving mechanism and the transverse moving mechanism are arranged, so that the horizontal direction and the vertical direction of the press head assembly body can be automatically moved and switched, the engine shaft bearing and the intermediate shaft bearing can be simultaneously press-fitted, and the flexible press-fitting requirement of a product can be met.

Description

Flexible engine shaft and intermediate shaft bearing press-fitting device
Technical Field
The invention relates to the technical field of assembly, in particular to a flexible engine shaft and intermediate shaft bearing press-fitting device.
Background
At present mix and move product engine shaft and jackshaft bearing pressure equipment mostly be many equipment independent operation, equipment flexibility is poor, and area increases, and can't realize the pressure head and remove at the free location of level and vertical position, and the pressure equipment quality can't effectively be guaranteed, and the flexibility is low.
Disclosure of Invention
The embodiment of the invention provides a flexible engine shaft and intermediate shaft bearing press-fitting device, and aims to solve the technical problems that the existing mixed moving product engine shaft and intermediate shaft bearing press-fitting device mostly has the defects that a plurality of devices operate independently, the flexibility of the devices is poor, the occupied area is increased, the free positioning movement of a pressure head at the horizontal position and the vertical position cannot be realized, the press-fitting quality cannot be effectively ensured, and the flexibility is low.
The invention provides a flexible engine shaft and intermediate shaft bearing press-fitting device which comprises a pressure head assembling mechanism, a vertical moving mechanism and a transverse moving mechanism, wherein the pressure head assembling mechanism comprises a plurality of pressure head assembling bodies, and the plurality of pressure head assembling bodies are used for press-fitting an engine shaft bearing and an intermediate shaft bearing; the vertical moving mechanism comprises a mounting seat and a plurality of pressure head cylinders fixed on the mounting seat, and the plurality of pressure head cylinders are respectively in corresponding driving connection with the corresponding assembly bodies and are respectively used for driving the corresponding assembly bodies to move up and down; the transverse moving mechanism comprises a welding frame and a servo motor, and the servo motor is in driving connection with the mounting seat and used for driving the mounting seat to transversely move.
In some embodiments, the servo motor drives the mounting seat to be transversely slidably disposed on the welding frame.
In some embodiments, a first sliding block is fixedly connected to the mounting seat, a second guide rail arranged transversely is fixed to the welding frame, and the first sliding block is in sliding fit with the second guide rail; or the like, or, alternatively,
the mounting seat is fixedly connected with a first guide rail which is transversely arranged, the welding frame is fixedly provided with a second sliding block, and the first guide rail is in sliding fit with the first sliding block.
In some embodiments, the vertical moving structure further includes a plurality of lead screw supporting seats, the mounting seat is provided with a plurality of vertical guide rails, and the plurality of lead screw supporting seats are slidably connected to the corresponding vertical guide rails;
the mounting seat comprises a vertical plate and a transverse plate connected with the vertical plate, the plurality of pressure head cylinders are fixed on the transverse plate, and the plurality of pressure head cylinders are vertically and correspondingly connected with the screw rod supporting seat through screw rods;
a plurality of one end of the pressure head assembly body is fixed on the screw rod connecting seat, and the other end of the pressure head assembly body is fixed on the transverse plate.
In some embodiments, each pressure head assembly body includes a pressure head linear shaft, a linear bearing, a pressure head mandrel and a pressure head, the linear bearing is coaxially sleeved on the periphery of the pressure head linear shaft, one end of the pressure head linear shaft is clamped and fixed on the corresponding screw rod connecting seat, the pressure head is connected to the other end of the pressure head linear shaft through a pressure head connecting part, and the periphery of the linear bearing is fixed on the transverse plate.
In some embodiments, the plurality of said ram assemblies comprises a pinion ram assembly, a countershaft bearing ram assembly and an engine shaft bearing ram assembly.
In some embodiments, each of the pressure head assemblies is provided with a corresponding photoelectric sensor, and a plurality of the photoelectric sensors are used for sensing the press-fitting in-place condition of the corresponding bearing.
In some embodiments, the mounting base is further movably connected with the welding frame through a drag chain.
In some embodiments, the welding jig further comprises a frame and two limit travel switches arranged on the frame, wherein the two limit travel switches are respectively used for limiting the transverse right-movement limit travel position and the transverse left-movement limit travel position of the servo motor driving the mounting seat relative to the welding jig.
In some embodiments, the mounting seat is fixed on a horizontal screw rod, and the horizontal screw rod is coaxially and fixedly connected to an output shaft of the servo motor.
The technical scheme provided by the invention has the beneficial effects that:
according to the flexible press-fitting device for the engine shaft and the intermediate shaft bearing, the vertical moving mechanism and the transverse moving mechanism are arranged, so that the horizontal direction and the vertical direction of the press head assembly body can be automatically moved and switched, the engine shaft bearing and the intermediate shaft bearing can be simultaneously press-fitted, and the flexible press-fitting requirement of a product can be met.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flexible engine shaft and intermediate shaft bearing press-fitting device according to an embodiment of the present invention;
fig. 2 is a schematic partial structural view of a flexible engine shaft and intermediate shaft bearing press-fitting device according to an embodiment of the present invention.
In the figure:
100. a frame; 10. a pressure head assembly; 11. a second guide rail; 12. a linear bearing; 14. a pressure head; 20. a mounting seat; 201. a vertical plate; 202. a transverse plate; 21. a pressure head cylinder; 22. a photosensor; 23. a vertical guide rail; 24. a screw rod supporting seat; 30. welding a frame; 31. a servo motor; 32. a horizontal screw rod; 33. a track; 41. a left limit travel switch; 42. a right limit switch; 51. a workpiece detection assembly; 61. and (4) servo pressing.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment of the invention provides a flexible engine shaft and intermediate shaft bearing press-fitting device, which can solve the technical problems that the existing mixed-moving product engine shaft and intermediate shaft bearing press-fitting device mostly has the defects that a plurality of devices operate independently, the flexibility of the devices is poor, the occupied area is increased, the free positioning movement of a pressure head 14 at the horizontal position and the vertical position cannot be realized, the press-fitting quality cannot be effectively ensured, and the flexibility is low.
Referring to fig. 1-2, the present invention provides a flexible engine shaft and intermediate shaft bearing press-fitting device, including a press head assembling mechanism, a vertical moving mechanism and a horizontal moving mechanism, wherein the press head assembling mechanism includes a plurality of press head assemblies 10, and the plurality of press head assemblies 10 are used for press-fitting an engine shaft bearing and an intermediate shaft bearing; the vertical moving mechanism comprises an installation base 20 and a plurality of pressure head cylinders 21 fixed on the installation base 20, and the pressure head cylinders 21 are respectively in corresponding driving connection with the corresponding assembly bodies and are respectively used for driving the corresponding assembly bodies to move up and down; the transverse moving mechanism comprises a welding frame 30 and a servo motor, and the servo motor is in driving connection with the mounting seat 20 and is used for driving the mounting seat 20 to transversely move.
According to the flexible press-fitting device for the engine shaft and the intermediate shaft bearing, the vertical moving mechanism and the transverse moving mechanism are arranged, so that the automatic movement and switching of the pressure head assembly 10 in the horizontal direction and the vertical direction are realized, the engine shaft bearing and the intermediate shaft bearing are simultaneously press-fitted, and the flexible press-fitting requirement of a product is met.
In one embodiment, the servo motor drives the mounting base 20 to slide laterally on the welding frame 30.
In an embodiment, a first sliding block is fixedly connected to the mounting base 20, a welding frame 30 is fixedly provided with a second guide rail 11 transversely arranged on the welding frame 30, and the first sliding block is in sliding fit with the second guide rail 11.
In an alternative embodiment of the present application, a first guide rail is fixed to the mounting base 20, and a second sliding block is fixed to the welding frame 30, and the first guide rail and the first sliding block are in sliding fit.
In a specific embodiment, the output shaft of the servo motor is coaxially and fixedly connected with the horizontal screw rod, and the horizontal screw rod 32 pushes the mounting base 20 to move horizontally.
In one embodiment, in order to ensure the stability and accuracy of the movement of the mounting base 20 and the ram assembling mechanism on the mounting base 20 in the horizontal direction, the welding rack 30 is provided with a double rail 33, the back surface of the mounting base 20 is provided with a double slide block, and the mounting base 20 is driven to move stably in the horizontal direction by the combination of the double rail 33 and the double slide block in a sliding fit manner and the horizontal screw rod 32.
In an embodiment, referring to fig. 2, the vertical moving structure further includes a plurality of screw rod supporting seats 24, the mounting seat is provided with a plurality of vertical guide rails 23, and the plurality of screw rod supporting seats 24 are slidably connected to the corresponding vertical guide rails 23;
the mounting seat 20 comprises a vertical plate 201 and a horizontal plate 202 connected with the vertical plate, the plurality of pressure head cylinders 21 are fixed on the horizontal plate 202, and the plurality of pressure head cylinders 21 are vertically and correspondingly connected with the screw rod supporting seat 24 through screw rods;
one end of the pressure head assembly 10 is fixed to the screw rod connecting seat, and the other end is fixed to the transverse plate 202.
In an embodiment, each of the pressure head assemblies 10 includes a pressure head 14 linear shaft, a linear bearing 12, a pressure head 14 core shaft, and a pressure head 14, the linear bearing 12 is coaxially sleeved on the periphery of the pressure head 14 linear shaft, one end of the pressure head 14 linear shaft is clamped on a corresponding screw rod connecting seat, the pressure head 14 is connected to the other end of the pressure head 14 linear shaft through a pressure head 14 connecting member, and the periphery of the linear bearing 12 is fixed on the transverse plate 202.
In one embodiment, the plurality of ram assemblies 10 includes a pinion ram assembly 10, a center shaft bearing ram assembly 10, and an engine shaft bearing ram assembly 10.
In an embodiment, each of the pressure head assemblies 10 is provided with a corresponding photoelectric sensor 22, and a plurality of the photoelectric sensors 22 are used for sensing the press-fitting in-place condition of the corresponding bearing and detecting the press-fitting track of the press-fitted engine crankshaft and the intermediate shaft bearing.
In an embodiment of the present application, the press-fitting locus and the press-fitting pressure of the pressed bearing are detected by providing a plurality of rails 33 on the frame 100 at positions corresponding to the bearing.
In one embodiment, the mounting base 20 is also movably connected to the welding frame 30 by a drag chain.
In an embodiment, the welding rack further comprises a rack 100, and two limit switches arranged on the rack 100, including a left limit switch 41 and a right limit switch 42, which are respectively used for limiting a transverse right movement limit position and a transverse left movement limit position of the servo motor driving the mounting base 20 relative to the welding rack 30, so as to play a role in limiting movement.
In an embodiment, the mounting seat 20 is fixed on a horizontal screw rod 32, and the horizontal screw rod 32 is coaxially and fixedly connected to an output shaft of the servo motor.
Based on the same invention concept, the invention also provides a flexible engine shaft and intermediate shaft bearing press-fitting system, which comprises the following steps:
a positioning acquisition module for positioning the engine shaft bearing and the intermediate shaft bearing loaded into the ram 14;
the control module is in communication connection with the positioning acquisition module and controls the press head 14 to carry out press fitting when positioning an engine shaft bearing and a middle shaft bearing which are fed into the press head 14;
and the press-fitting track and press-fitting pressure acquisition module is in communication connection with the control module and is used for acquiring press-fitting tracks of the engine shaft bearing and the intermediate shaft bearing after press fitting and a press-fitting pressure value of the pressure head 14.
And the control module is also used for sending a press-fitting completion information instruction when the press-fitting tracks of the engine shaft bearing and the intermediate shaft bearing after press-fitting and the press-fitting pressure value of the pressure head 14 meet the preset requirement standard.
And the control module is also used for sending a press-fitting unqualified information instruction when the press-fitting tracks of the engine shaft bearing and the intermediate shaft bearing after press-fitting and the press-fitting pressure value of the pressure head 14 do not meet the preset requirement standard.
The invention provides a flexible engine shaft and intermediate shaft bearing press-fitting device, which comprises the following steps:
s1, initially positioning the engine shaft on the positioning support and the positioning sleeve;
s2, carrying out initial positioning on the bearing-mounted positioning support and the positioning sleeve of the intermediate shaft;
s3, sequentially feeding an engine shaft bearing and a middle shaft bearing to be pressed into a pressure head 14 of the pressure head assembly 10;
s4, starting the transverse moving mechanism and the vertical moving mechanism to drive the bearing to be pressed and the pressure head assembly body 10 to move and switch in the horizontal and vertical directions, positioning the bearing through the photoelectric sensor 22, and pressing the positioned engine shaft bearing and the left bearing of the intermediate shaft by the servo press 61;
s5, effectively judging the press-fitting tracks and pressures of the engine shaft bearing and the intermediate shaft bearing after press-fitting;
s6, when the press-fitting track and the press-fitting pressure pass effective judgment, manually turning the engine shaft bearing and the intermediate shaft bearing until the large end faces are upward;
s7, starting the transverse moving mechanism and the vertical moving mechanism to drive the bearing to be pressed and the pressure head assembly body 10 to move and switch in the horizontal and vertical directions, positioning the bearing through the photoelectric sensor 22, and pressing the positioned engine shaft bearing and the bearing on the right side of the middle shaft by the servo press 61;
and S8, effectively judging the press-fitting tracks and pressures of the engine shaft bearing and the right bearing of the intermediate shaft after press-fitting.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is to be noted that, in the present invention, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a flexible engine shaft and intermediate shaft bearing pressure equipment device which characterized in that includes:
the pressure head assembling mechanism comprises a plurality of pressure head assembling bodies, and the pressure head assembling bodies are used for press-mounting an engine shaft bearing and an intermediate shaft bearing;
the vertical moving mechanism comprises a mounting seat and a plurality of pressure head cylinders fixed on the mounting seat, and the plurality of pressure head cylinders are respectively in corresponding driving connection with the corresponding assembly bodies and are respectively used for driving the corresponding assembly bodies to move up and down;
and the transverse moving mechanism comprises a welding frame and a servo motor, and the servo motor is in driving connection with the mounting seat and is used for driving the mounting seat to transversely move.
2. The compliant engine shaft and countershaft bearing press fitting apparatus of claim 1 wherein said servo motor drives said mount laterally slidably disposed on said weld carriage.
3. The flexible engine shaft and intermediate shaft bearing press-fitting device as recited in claim 2, wherein a first slide block is fixedly connected to the mounting base, a second guide rail is transversely arranged and fixed to the welding frame, and the first slide block and the second guide rail are in sliding fit; or the like, or, alternatively,
the mounting seat is fixedly connected with a first guide rail which is transversely arranged, the welding frame is fixedly provided with a second sliding block, and the first guide rail is in sliding fit with the first sliding block.
4. The compliant engine shaft and countershaft bearing press fitting apparatus of claim 3 wherein said vertically movable structure further comprises a plurality of lead screw supports, said mounts having a plurality of vertical rails thereon, a plurality of said lead screw supports slidably connected to corresponding said vertical rails;
the mounting seat comprises a vertical plate and a transverse plate connected with the vertical plate, the plurality of pressure head cylinders are fixed on the transverse plate, and the plurality of pressure head cylinders are vertically and correspondingly connected with the screw rod supporting seat through screw rods;
a plurality of one end of the pressure head assembly body is fixed on the screw rod connecting seat, and the other end of the pressure head assembly body is fixed on the transverse plate.
5. The flexible engine shaft and intermediate shaft bearing press-fitting device as defined in claim 4, wherein each of the pressure head assemblies comprises a pressure head linear shaft, a linear bearing, a pressure head core shaft and a pressure head, the linear bearing is coaxially sleeved on the outer circumference of the pressure head linear shaft, one end of the pressure head linear shaft is clamped on the corresponding screw rod connecting seat, the pressure head is connected to the other end of the pressure head linear shaft through a pressure head connecting member, and the outer circumference of the linear bearing is fixed on the transverse plate.
6. A compliant engine shaft and intermediate shaft bearing press fit apparatus as in claim 5 wherein a plurality of said ram assemblies comprise a pinion ram assembly, an intermediate shaft bearing ram assembly and an engine shaft bearing ram assembly.
7. The compliant engine shaft and countershaft bearing press-fitting apparatus of claim 6 wherein each said ram assembly has a corresponding photoelectric sensor, a plurality of said photoelectric sensors for sensing when a corresponding bearing is press-fitted in place.
8. The compliant engine shaft and countershaft bearing press fitting apparatus of claim 1 wherein said mounting block is further articulated to said weld bracket by a drag chain.
9. The compliant engine shaft and intermediate shaft bearing press-fitting apparatus as in claim 7, further comprising a frame and two limit travel switches disposed on the frame for limiting the lateral right travel limit position and the lateral left travel limit position of said mounting base driven by said servo motor relative to said weld carriage, respectively.
10. The compliant engine shaft and countershaft bearing press fitting apparatus of claim 1 wherein said mounting block is affixed to a horizontal lead screw that is coaxially fixedly attached to an output shaft of said servo motor.
CN202111108700.9A 2021-09-22 2021-09-22 Flexible engine shaft and intermediate shaft bearing press-fitting device Pending CN113770689A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111108700.9A CN113770689A (en) 2021-09-22 2021-09-22 Flexible engine shaft and intermediate shaft bearing press-fitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111108700.9A CN113770689A (en) 2021-09-22 2021-09-22 Flexible engine shaft and intermediate shaft bearing press-fitting device

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CN113770689A true CN113770689A (en) 2021-12-10

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CN202111108700.9A Pending CN113770689A (en) 2021-09-22 2021-09-22 Flexible engine shaft and intermediate shaft bearing press-fitting device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116038321A (en) * 2022-12-28 2023-05-02 陕西法士特齿轮有限责任公司 Automatic press-fitting device and method for intermediate shaft bearing and clamp spring of main gearbox
CN116038321B (en) * 2022-12-28 2024-06-04 陕西法士特齿轮有限责任公司 Automatic press-fitting device and method for intermediate shaft bearing and clamp spring of main gearbox

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN116038321A (en) * 2022-12-28 2023-05-02 陕西法士特齿轮有限责任公司 Automatic press-fitting device and method for intermediate shaft bearing and clamp spring of main gearbox
CN116038321B (en) * 2022-12-28 2024-06-04 陕西法士特齿轮有限责任公司 Automatic press-fitting device and method for intermediate shaft bearing and clamp spring of main gearbox

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Application publication date: 20211210