CN112372579A - Horizontal type pressure bearing system - Google Patents

Horizontal type pressure bearing system Download PDF

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Publication number
CN112372579A
CN112372579A CN202011366125.8A CN202011366125A CN112372579A CN 112372579 A CN112372579 A CN 112372579A CN 202011366125 A CN202011366125 A CN 202011366125A CN 112372579 A CN112372579 A CN 112372579A
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CN
China
Prior art keywords
press
bearing system
fixedly connected
cylinder
bearing
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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
CN202011366125.8A
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Chinese (zh)
Inventor
向金明
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.)
Hubei Liwei Machinery Equipment Co ltd
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Hubei Liwei Machinery Equipment Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hubei Liwei Machinery Equipment Co ltd filed Critical Hubei Liwei Machinery Equipment Co ltd
Priority to CN202011366125.8A priority Critical patent/CN112372579A/en
Publication of CN112372579A publication Critical patent/CN112372579A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/06Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races
    • B25B27/064Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races fluid driven

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

Abstract

The invention relates to a horizontal type press bearing system which comprises a base, wherein a linear guide rail is fixedly arranged in the middle of the base, and two cylinders are symmetrically arranged on two sides of the base; the cylinder comprises a thrust rod; one end of the thrust rod, which is far away from the cylinder body of the air cylinder, is fixedly connected with a press-mounting sleeve; the linear guide rail is connected with three sliding blocks in a sliding mode, the sliding blocks on the two sides are fixedly connected with limiting plates used for fixing the press-fit sleeve, and the sliding block in the middle is fixedly connected with a lifting V-shaped support used for horizontally supporting the rotor. The invention realizes the simultaneous press mounting of the two bearings, has high press mounting precision, high efficiency, low cost and wide application range, and is suitable for press mounting of the bearings of different types of rotors and production lines with larger scale. The invention adopts the linear guide rail and the sliding block with high precision, ensures that the pressure in the bearing press-fitting process is always kept on the same straight line, and has obvious effect of reducing the shaft deformation caused by radial force applied to the rotor shaft in the press-fitting process.

Description

Horizontal type pressure bearing system
Technical Field
The invention belongs to the technical field of cold pressing bearings of motors, and particularly relates to a horizontal pressing bearing system.
Background
The bearing is an important component of the motor, and the bearing has the main functions of supporting the mechanical rotating body, reducing the friction coefficient in the movement process and ensuring the rotating precision. The quality of the bearing directly influences the noise level and the service life of the motor. The process of pressing the bearing into the rotor has great influence on the bearing, namely the press-fitting quality of the bearing directly influences the assembly quality and the service life of the motor.
The existing method of pressing the bearing into the rotor manually by experience cannot ensure the dimensional precision, the problems of bearing damage, operation clamping stagnation or abnormal sound and the like caused by the fact that the bearing is pressed over the head or the rotor shaft is bent frequently occur, and the press mounting efficiency is very low. In addition, the existing bearing press-fitting equipment can only realize press-fitting of one bearing at a time, is too high in cost and is not suitable for a production line with a large scale. The existing bearing press-fitting equipment mainly adopts an oil pressure mode, has the defects of difficult maintenance, high cost, inconvenient pressure adjustment and the like, and simultaneously needs to replace hydraulic oil or has an oil leakage phenomenon, so that the difficulty of field management is high.
Disclosure of Invention
The invention provides a horizontal type bearing pressing system aiming at the technical problems in the prior art, and solves at least one of the problems of poor pressing precision, low efficiency, high cost and the like in the existing bearing pressing process.
The technical scheme for solving the technical problems is as follows:
the horizontal type press bearing system comprises a base, wherein a linear guide rail is fixedly arranged in the middle of the base, and two cylinders are symmetrically arranged on two sides of the base; the cylinder comprises a thrust rod; one end of the thrust rod, which is far away from the cylinder body of the air cylinder, is fixedly connected with a press-mounting sleeve; the linear guide rail is connected with three sliding blocks in a sliding mode, the sliding blocks on the two sides are fixedly connected with limiting plates used for fixing the press-fit sleeve, and the sliding block in the middle is fixedly connected with a lifting V-shaped support used for horizontally supporting the rotor.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the lifting V-shaped support comprises a connecting plate fixed on the sliding block and an adjusting plate with adjustable height; an adjusting screw for supporting an adjusting plate is vertically arranged in the middle of the connecting plate, and a plurality of symmetrically distributed guide columns are fixedly connected around the adjusting screw; one end of the adjusting screw rod, which is close to the adjusting plate, is in threaded connection with an adjusting nut; the adjusting plate is arranged on the guide post in a penetrating manner; the top of the adjusting plate is fixedly connected with a V-shaped block.
Further, the slider includes a dovetail groove; the linear guide rail is a dovetail guide rail.
Further, the slider is a flange slider.
Further, the press-fit sleeve is in threaded connection with the thrust rod.
Further, the limiting plate comprises a limiting hole and a jackscrew; the press-fitting sleeve penetrates through the limiting hole and is fixed on the limiting plate through a jackscrew; the cylinder still includes the stop nut who is used for butt pressure equipment cover.
Further, the air inlet pipe of the air cylinder is provided with a pressure regulating valve.
Furthermore, the horizontal type pressure bearing system also comprises a plurality of measuring rods which are respectively matched with the sizes of the rotor bearing gears of different types.
Further, the cylinder is fixedly connected with the base through two L-shaped supports.
The invention has the beneficial effects that:
(1) the invention realizes the simultaneous press mounting of the two bearings, has high press mounting precision, high efficiency, low cost and wide application range, and is suitable for press mounting of the bearings of different types of rotors and production lines with larger scale.
(2) In the press mounting process, the positions of the bearing and the rotor can be well ensured, the phenomena that the center line of the bearing deviates from the center line of the rotor, the bearing is pressed over the head, the bearing is damaged or bent, or the bearing is not pressed in place are avoided, the problems that the size of a bearing gear cannot be ensured due to the fact that the bearing is pressed over the head when the motor rotor is pressed in the cold pressing process of the bearing, the bearing is crushed, the rotor shaft is bent and the like are effectively solved, the problems that the size precision of the bearing gear cannot be ensured due to the fact that the bearing is not pressed in place, the motor is difficult to assemble and the like during assembling are solved.
(3) The invention adopts the linear guide rail and the sliding block with high precision, ensures that the pressure in the bearing press-fitting process is always kept on the same straight line, and has obvious effect of reducing the shaft deformation caused by radial force applied to the rotor shaft in the press-fitting process.
(4) The invention adopts air pressure instead of oil pressure, is environment-friendly and energy-saving, is convenient to control, is simple to maintain and is simple to adjust the pressure.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic perspective view of the liftable V-shaped support of the present invention;
FIG. 3 is a left side view of the liftable V-shaped support of the present invention;
FIG. 4 is a schematic perspective view of a slider according to the present invention;
FIG. 5 is a left side view of the slider of the present invention;
FIG. 6 is a schematic perspective view of the linear guide of the present invention;
fig. 7 is a schematic perspective view of the limiting plate according to the present invention;
FIG. 8 is a schematic view of the press-fit sleeve of the present invention;
FIG. 9 is a side view of the press-fit sleeve of the present invention;
FIG. 10 is a schematic perspective view of the cylinder of the present invention;
FIG. 11 is a schematic perspective view of a metering rod according to the present invention;
fig. 12 is a schematic perspective view of an L-shaped bracket according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a rotor, 2, a liftable V-shaped support, 21, a connecting plate, 22, an adjusting plate, 23, an adjusting screw, 24, an adjusting nut, 25, a guide pillar, 26, a V-shaped block, 3, a sliding block, 31, a dovetail groove, 4, a linear guide rail, 5, a limiting plate, 51, a limiting hole, 52, a jackscrew, 6, a press-fit sleeve, 7, an air cylinder, 71, a thrust rod, 72, a limiting nut, 8, a measuring rod, 9, an L-shaped support, 10 and a base.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
It should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are intended to be construed broadly, as if they were connected either fixedly or removably, or as integrally formed structures. To those of ordinary skill in the art, the specific meaning of such terms in this patent may be understood as appropriate.
As shown in fig. 1 to 12, the horizontal press bearing system designed by the present invention comprises a base 10, wherein a linear guide rail 4 is fixedly installed in the middle of the base 10, and two cylinders 7 are symmetrically installed on two sides of the base; the cylinder 7 includes a thrust rod 71; and a pressing sleeve 6 is fixedly connected to one end of the thrust rod 71 far away from the cylinder body of the air cylinder 7. The linear guide 4 is connected with three sliders 3 in a sliding manner, the sliders 3 on the two sides are fixedly connected with limiting plates 5 for fixing the press-fitting sleeve 6, and the slider 3 in the middle is fixedly connected with a lifting V-shaped support 2 for horizontally supporting the rotor 1. The rotor 1 is preferably a cast aluminium rotor.
The horizontal type pressure bearing system adopts a pneumatic mode, and has the advantages of environmental protection, energy conservation, convenience in control, simplicity in maintenance, simplicity in pressure adjustment and the like compared with the existing oil pressure mode.
The horizontal type press bearing system adopts the linear guide rail 4, the sliding block 3 (limiting), the stroke-adjustable cylinder 7 and the measuring rod 8, the press mounting precision is obviously improved, meanwhile, the bearing is not damaged or the rotor shaft is not bent, and the maintenance is simple.
Preferably, the limiting plate 5 is connected with the sliding block 3 through a bolt so as to be convenient for positioning during disassembly and assembly.
As shown in fig. 2 and 3, the liftable V-shaped support 2 comprises a connecting plate 21 fixed on the sliding block 3 and a height-adjustable adjusting plate 22; an adjusting screw 23 for supporting an adjusting plate 22 is vertically arranged in the middle of the connecting plate 21, and a plurality of symmetrically distributed guide posts 25 are fixedly connected around the adjusting screw; one end of the adjusting screw 23 close to the adjusting plate 22 is in threaded connection with an adjusting nut 24; the adjusting plate 22 is arranged on the guide post 25 in a penetrating way; the top of the adjusting plate 22 is fixedly connected with a V-shaped block 26. That can go up and down is realized through adjusting screw 23, adjusting nut 24 and a plurality of guide pillar 25, realizes the altitude mixture control of regulating plate 22 through changing adjusting nut 24 position on adjusting screw 23, and guide pillar 25 restricts the moving direction of regulating plate 22 simultaneously to ensure that the axis of rotor 1 and the thrust rod 71 axis of cylinder 7 are on the same straight line, and then improve the pressure equipment precision, effectively avoid the pressure equipment process rotor shaft to receive radial force and arouse the axle to warp. In addition, the liftable V-shaped support 2 enables the horizontal type press bearing system to be suitable for press mounting bearings of rotors 1 of different types, and the practicability and the application range of the horizontal type press bearing system are remarkably improved.
Preferably, the V-shaped block 26 is connected to the adjusting plate 22 by bolts for positioning during assembling and disassembling.
Preferably, the number of the guide posts 25 is three or four, so that the moving direction of the adjusting plate 22 is limited, and the processing difficulty and cost are reduced.
As shown in fig. 4 to 6, the slider 3 includes a dovetail groove 31; the linear guide rail 4 is a dovetail guide rail, the sliding block 3 is in sliding fit with the dovetail guide rail through the dovetail groove 31, the advantages of high precision and good working reliability are achieved, pressure of the bearing in the press mounting process is guaranteed to be kept on the same straight line all the time, and the effect of reducing shaft deformation caused by radial force on a rotor shaft in the press mounting process is obvious. The slide 3 is preferably a flanged slide.
As shown in fig. 7-10, the press-fit sleeve 6 is threadedly coupled to the thrust rod 71. The limiting plate 5 comprises a limiting hole 51 and a jackscrew 52; the press-fit sleeve 6 penetrates through the limiting hole 51 and is fixed on the limiting plate 5 through a jackscrew 52; the cylinder 7 further comprises a stop nut 72 for abutting against the press-fit sleeve 6.
The horizontal type pressure bearing system adjusts the depth of screwing the threads of the pressure sleeve 6 into the thrust rod 71 through the measuring rod 8, after the screwing depth at two ends is adjusted, the pressure sleeve 6 is fixed through the jackscrew 52 on the limiting plate 5, the limiting nut 72 on the air cylinder 7 is propped against the pressure sleeve 6, and the pressure sleeve 6 and the limiting plate 5 form a whole body capable of moving along the linear guide rail 4.
In the present embodiment, a pressure regulating valve is provided in the intake pipe of the cylinder 7. The two air cylinders 7 uniformly distribute air pressure through the pressure regulating valve, so that the pressure of the two air cylinders 7 is ensured to be consistent, and the thrust of the two thrust rods 71 is further ensured to be consistent.
As shown in fig. 11, the horizontal type pressure bearing system further comprises a plurality of measuring rods 8 which are respectively matched with the sizes of different types of rotor bearing steps and are used for improving the stroke precision of the air cylinder 7. I.e. the dimensions of the different types of rotor bearing stops are adjusted by adjusting the stroke of the cylinder 7, which is guaranteed by the metering rod 8. In actual use, the measuring rod 8 is replaced according to the type (model) of the rotor 1, operation is convenient, and the practicability and application range of the horizontal type pressure bearing system are remarkably improved.
As shown in fig. 1 and 12, the cylinder 7 is fixedly connected to the base 10 through two L-shaped brackets 9. The L-shaped support 9 is fixedly connected with the air cylinder 7 and the base 10 through bolts respectively so as to be convenient for positioning during disassembly and assembly.
The working principle of the horizontal type pressure bearing system is as follows:
1) placing the base 10 on a platform, and leveling and aligning by using a level gauge; according to the type (model) of the rotor 1, a measuring rod 8 with the corresponding bearing gear size is placed in the middle of a press-fitting sleeve 6, and the screwing depth of the screw thread of the press-fitting sleeve 6 and/or the stroke of an adjusting cylinder 7 are adjusted to enable the strokes of the cylinders 7 at two sides to be exactly consistent with the size of the measuring rod 8;
2) after the stroke of the cylinder 7 is adjusted, the measuring rod 8 is taken down, the rotor 1 of the bearing to be pressed is placed on the V-shaped block 26, and the bearing is sleeved in the V-shaped block from two ends respectively; adjusting the adjusting screw 23 and the adjusting nut 24 of the liftable V-shaped bracket 2 to make the center height of the rotor 1 consistent with the center height of the thrust rod 71 of the cylinder 7;
3) and the bearing press-fitting process can be completed by stepping down the control pedal of the air cylinder 7, and the rotor 1 after the bearing is press-fitted is taken down by loosening the control pedal of the air cylinder 7.
The invention realizes the simultaneous press mounting of the two bearings, has high press mounting precision, high efficiency, low cost and wide application range, and is suitable for press mounting of the bearings of the rotors 1 of different types and production lines with larger scale. In the press mounting process, the positions of the bearing and the rotor 1 can be well ensured, the phenomenon that the center line of the bearing deviates from the center line of the rotor 1, the phenomenon that the bearing presses over the head to damage the bearing or bend the bearing or the bearing press mounting is not in place can not be caused, and the problems that the size of a bearing gear cannot be ensured, the bearing is crushed, the rotor shaft is bent and the like due to the over-pressing of the bearing when the motor rotor presses the bearing by cold are effectively solved, and the problems that the size precision of the bearing gear cannot be ensured, the motor is difficult to assemble and the like due to the insufficient pressing of the bearing are solved. The invention adopts the linear guide rail 4 and the sliding block 3 with high precision, ensures that the pressure of the bearing in the press fitting process is always kept on the same straight line, and has obvious effect on reducing the shaft deformation caused by radial force applied to the rotor shaft in the press fitting process. The invention adopts air pressure instead of oil pressure, is environment-friendly and energy-saving, is convenient to control, is simple to maintain and is simple to adjust the pressure.
The mechanisms, components and parts of the present invention which are not described in detail are all the existing structures which exist in the prior art. Can be purchased directly from the market.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. The horizontal type press bearing system comprises a base (10) and is characterized in that a linear guide rail (4) is fixedly arranged in the middle of the base (10), and two cylinders (7) are symmetrically arranged on two sides of the base; the cylinder (7) comprises a thrust rod (71); one end of the thrust rod (71) far away from the cylinder body of the cylinder (7) is fixedly connected with a press-mounting sleeve (6); the linear guide (4) is connected with three sliders (3) in a sliding mode, the sliders (3) on the two sides are fixedly connected with limiting plates (5) used for fixing a press-fitting sleeve (6), and the slider (3) in the middle is fixedly connected with a lifting V-shaped support (2) used for horizontally supporting a rotor (1).
2. The horizontal type press bearing system according to claim 1, wherein the liftable V-shaped support (2) comprises a connecting plate (21) fixed on the sliding block (3) and a regulating plate (22) with adjustable height; an adjusting screw rod (23) for supporting an adjusting plate (22) is vertically arranged in the middle of the connecting plate (21), and a plurality of symmetrically distributed guide posts (25) are fixedly connected around the adjusting screw rod; one end of the adjusting screw rod (23) close to the adjusting plate (22) is in threaded connection with an adjusting nut (24); the adjusting plate (22) is arranged on the guide post (25) in a penetrating way; the top of the adjusting plate (22) is fixedly connected with a V-shaped block (26).
3. Horizontal press bearing system according to claim 1, wherein the slide (3) comprises a dovetail groove (31); the linear guide rail (4) is a dovetail guide rail.
4. Horizontal press bearing system according to claim 1, wherein the slide (3) is a flanged slide.
5. The horizontal plain bearing system according to claim 1, wherein the press-fit sleeve (6) is screwed to the thrust rod (71).
6. The horizontal type pressure bearing system according to claim 5, wherein the limit plate (5) comprises a limit hole (51) and a jackscrew (52); the press-fit sleeve (6) penetrates through the limiting hole (51) and is fixed on the limiting plate (5) through a jackscrew bolt (52); the air cylinder (7) further comprises a limiting nut (72) used for abutting against the press-fitting sleeve (6).
7. The horizontal pressure bearing system according to claim 1, characterized in that the inlet pipe of the cylinder (7) is provided with a pressure regulating valve.
8. The horizontal pressure bearing system of claim 1, further comprising a plurality of gauge rods (8) sized to match different types of rotor bearing steps, respectively.
9. The horizontal pressure bearing system according to claim 1, characterized in that the cylinder (7) is fixedly connected with the base (10) by two L-shaped brackets (9).
CN202011366125.8A 2020-11-29 2020-11-29 Horizontal type pressure bearing system Pending CN112372579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011366125.8A CN112372579A (en) 2020-11-29 2020-11-29 Horizontal type pressure bearing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011366125.8A CN112372579A (en) 2020-11-29 2020-11-29 Horizontal type pressure bearing system

Publications (1)

Publication Number Publication Date
CN112372579A true CN112372579A (en) 2021-02-19

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CN202011366125.8A Pending CN112372579A (en) 2020-11-29 2020-11-29 Horizontal type pressure bearing system

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114054607A (en) * 2021-11-19 2022-02-18 遵义市大地和电气有限公司 Rotor riveting device of rotary transformer sensor
CN114268194A (en) * 2021-12-15 2022-04-01 全南县超亚科技有限公司 Vertical mounting bearing device for motor rotor
CN114910205A (en) * 2022-05-12 2022-08-16 青岛成信马达有限公司 Equipment for automatically detecting press-in state of bearing
CN115091192A (en) * 2022-07-11 2022-09-23 安徽同华新能源动力股份有限公司 Bearing press-fitting tool

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203031241U (en) * 2012-12-07 2013-07-03 上虞市薪人机电科技有限公司 Bearing automatic press-in machine
CN203863318U (en) * 2014-05-20 2014-10-08 常州市道铖传动科技有限公司 Bearing press sleeve devic
CN105643245A (en) * 2016-03-09 2016-06-08 中特科技工业(青岛)有限公司 Automatic rotor bearing assembly mechanism
CN206779854U (en) * 2017-02-24 2017-12-22 苏州工业园区凯艺精密科技有限公司 A kind of last item holds fixture
KR20190069255A (en) * 2017-12-11 2019-06-19 대한민국(전북기계공업고등학교장) universal joint cross shaft bearing insert jig
CN209267402U (en) * 2019-01-22 2019-08-16 汇润电气有限公司 Stepping motor rotor bearing press mounting tooling
CN211490389U (en) * 2019-11-20 2020-09-15 江门市森柏实业有限公司 Full-automatic bearing assembling equipment

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203031241U (en) * 2012-12-07 2013-07-03 上虞市薪人机电科技有限公司 Bearing automatic press-in machine
CN203863318U (en) * 2014-05-20 2014-10-08 常州市道铖传动科技有限公司 Bearing press sleeve devic
CN105643245A (en) * 2016-03-09 2016-06-08 中特科技工业(青岛)有限公司 Automatic rotor bearing assembly mechanism
CN206779854U (en) * 2017-02-24 2017-12-22 苏州工业园区凯艺精密科技有限公司 A kind of last item holds fixture
KR20190069255A (en) * 2017-12-11 2019-06-19 대한민국(전북기계공업고등학교장) universal joint cross shaft bearing insert jig
CN209267402U (en) * 2019-01-22 2019-08-16 汇润电气有限公司 Stepping motor rotor bearing press mounting tooling
CN211490389U (en) * 2019-11-20 2020-09-15 江门市森柏实业有限公司 Full-automatic bearing assembling equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114054607A (en) * 2021-11-19 2022-02-18 遵义市大地和电气有限公司 Rotor riveting device of rotary transformer sensor
CN114268194A (en) * 2021-12-15 2022-04-01 全南县超亚科技有限公司 Vertical mounting bearing device for motor rotor
CN114268194B (en) * 2021-12-15 2023-05-09 全南县超亚科技有限公司 Vertical installation bearing device for motor rotor
CN114910205A (en) * 2022-05-12 2022-08-16 青岛成信马达有限公司 Equipment for automatically detecting press-in state of bearing
CN115091192A (en) * 2022-07-11 2022-09-23 安徽同华新能源动力股份有限公司 Bearing press-fitting tool
CN115091192B (en) * 2022-07-11 2023-09-22 安徽同华新能源动力股份有限公司 Bearing press-fitting tool

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Application publication date: 20210219