CN108896781A - A kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism and method - Google Patents
A kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism and method Download PDFInfo
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- CN108896781A CN108896781A CN201811010605.3A CN201811010605A CN108896781A CN 108896781 A CN108896781 A CN 108896781A CN 201811010605 A CN201811010605 A CN 201811010605A CN 108896781 A CN108896781 A CN 108896781A
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- revolving speed
- tachometric survey
- snap ring
- jackshaft
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000523 sample Substances 0.000 claims abstract description 29
- 230000006698 induction Effects 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000005355 Hall effect Effects 0.000 claims description 5
- 230000005674 electromagnetic induction Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 241001347978 Major minor Species 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000003556 assay Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention provides a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism and method, including revolving speed snap ring, tachometric survey code-disc, tachometric survey lid and speed probe；Odd-side jackshaft one end is connect by bearing with rear cover shell, odd-side jackshaft is provided with the card slot for carrying out stop to odd-side jackshaft for installing jackshaft locating snap ring, revolving speed snap ring is fixedly connected with card slot, revolving speed snap ring is fixedly connected with tachometric survey code-disc, both coaxial with odd-side jackshaft；Tachometric survey lid is fixedly connected with rear cover shell, and speed probe setting is covered in tachometric survey；When vehicle operates normally, tachometric survey code-disc makes rotating motion with odd-side jackshaft, and the magnetic induction line of the outer rim convex key cutting speed probe of tachometric survey code-disc.Fluctuation of speed abnormal point can be effectively analyzed, and cause is confirmed by abnormal point, field failure can be tracked at the first time, without removing and decomposing to confirm the source of trouble from vehicle by speed changer.
Description
Technical field
The invention belongs to commercial vehicle major-minor case structure speed changer fields, are related to a kind of portable commercial vehicle odd-side jackshaft turn
Fast rapid survey mechanism and method.
Background technique
Commercial vehicle major-minor case structure speed changer has the characteristics that ratio coverage is wide, bearing capacity is strong and easy to operate, is state
The commercial vehicle functional component of inside and outside mainstream.But since odd-side speed ratio is big, operating condition is disliked and omited, and compressed-air shifting is generally used, exists and changes
Shelves impact, Product Process and manufacture influence in addition, and domestic commercial vehicle secondary box of gearbox gear and synchronizer failure rate are higher at present.
When odd-side abnormal sound or other problems occur for vehicle, it is difficult to be analyzed by field observation or driving test, and carries out FCL
It opens and inspect not only to take time and effort and be not easy effectively to analyze and finds out the source of trouble.
For the confirmation and elimination of commercial vehicle secondary box of gearbox failure, domestic market generally uses vehicle to repair or service
It enters the station and opens and inspect the mode of replacement accessory, this kind mode is time-consuming and there are certain erroneous judgements, and causes to provide during replacing accessory
Source waste is less useful for confirmation fault rootstock；Overseas market generally uses field assay and opens and inspect maintenance when necessary
Mode, in spite of certain detection device, but field assay is unable to system and height also more according to the personal experiences of technical staff
The confirmation failure of effect.
Both at home and abroad to the detection of vehicle secondary box of gearbox working condition, be more for speed changer output flange or vehicle bridge into
Row, obtained data cannot effectively reflect odd-side actual working state due to the influence of various internal and external environments.And to odd-side among
The First data of odd-side operation then can be obtained in the real-time monitoring of axis.However, if being surveyed in real time to odd-side jackshaft revolving speed
Amount, since it need to carry out machine on speed changer periphery or jackshaft loaded on monitoring device is installed inside speed changer, under conventional means additional
Add etc. for fixing.Speed changer periphery or inner body progress machine are added or destroyed, not only takes time and effort, cause progress slow
Slowly, and meeting client's later period use has an impact.Therefore, there are biggish limitations for conventional monitoring and means of testing.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of portable commercial vehicle odd-side jackshaft is provided
Revolving speed rapid survey mechanism and method can effectively analyze fluctuation of speed abnormal point, and confirm cause, Neng Gou by abnormal point
One time was tracked field failure, without removing and decomposing to confirm the source of trouble from vehicle by speed changer.
In order to achieve the above objectives, the present invention is achieved by the following scheme：
A kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism, including revolving speed snap ring, tachometric survey code-disc,
Tachometric survey lid and speed probe；
Odd-side jackshaft one end is connect by bearing with rear cover shell, and odd-side jackshaft is provided with for installing centre
Axis locating snap ring carries out the card slot of stop to odd-side jackshaft, and revolving speed snap ring is fixedly connected with card slot, revolving speed snap ring and tachometric survey
Code-disc is fixedly connected, both coaxial with odd-side jackshaft；Tachometric survey lid is fixedly connected with rear cover shell, and speed probe is set
It sets and is covered in tachometric survey；
When vehicle operates normally, tachometric survey code-disc makes rotating motion with odd-side jackshaft, and tachometric survey code-disc
The magnetic induction line of outer rim convex key cutting speed probe.
Preferably, revolving speed snap ring is semicircle snap ring, and two revolving speed snap rings are opposed to be mounted in odd-side jackshaft card slot.
Preferably, revolving speed snap ring one end is provided with the buckle that can cooperate with card slot, and the other end is provided with and revolving speed
Measure the boss of code-disc inner circle cooperation.
Preferably, tachometric survey code-disc and revolving speed snap ring are in contact with it one end end face correspondence and are evenly arranged with for connection
Through-hole.
Preferably, tachometric survey lid is provided with radial through-hole, and speed probe measurement end protrudes into through-hole.
Further, tachometric survey tops are provided with boss, and through-hole is through setting at boss.
Further, speed probe is vertically arranged.
Preferably, the speed probe is hall-effect speed sensor.
A kind of portable commercial vehicle odd-side jackshaft revolving speed method for fast measuring, the measuring machine based on above-mentioned any one
Structure includes the following steps,
Step 1, odd-side intermediate shaft cap and jackshaft locating snap ring are dismantled；
Step 2, revolving speed snap ring and card slot are fixedly mounted, tachometric survey code-disc and revolving speed snap ring are fixedly mounted, and revolving speed is surveyed
Amount lid is fixedly mounted with rear cover shell, and speed probe is mounted on tachometric survey and covers；
Step 3, vehicle is operated normally, tachometric survey code-disc makes rotating motion with odd-side jackshaft, and revolving speed is surveyed
The magnetic induction line for measuring the outer rim convex key cutting speed probe of code-disc generates electromagnetic induction, runs to form electric signal to jackshaft
Realtime monitoring.
Compared with prior art, the invention has the advantages that：
The present invention is first by the way that when mechanism works, tachometric survey code-disc makes rotating motion with odd-side jackshaft, and revolving speed
The magnetic induction line of the outer rim convex key cutting speed probe of code-disc is measured, for monitoring secondary box of gearbox jackshaft revolving speed and confirmation odd-side
Failure provides measurement means, it can be achieved that real-time measurement to odd-side jackshaft revolving speed, can carry out information processing based on test data
And confirm the source of trouble.Make accident analysis rise to data from micro-judgment to support, be provided a strong guarantee for fault recognition.
Secondly, keeping existing speed changer part integrity, measurement is rapidly completed and user's use is not had an impact.Mechanism
Belong to independent property system, can realize real-time monitoring in the case where replacing speed changer periphery individual part, without disassembling speed changer or right
Speed changer part carries out machine and adds etc. to realize that measuring mechanism is connected, and user can be normally carried out operation after mounting, complete measurement
After can gain former part.Therefore, product has been purchased to user when mechanism is installed not have an impact, and vehicle is not interfered under working condition
It uses, can normally restore to the original state after completing measurement, be almost zero on user's normal operation influence.
Again, this measuring mechanism is small and exquisite portable, facilitates analyzing and diagnosing.Mechanism of the present invention only has 5 small parts, convenient for outgoing
It carries and uses；And due to installation, it is easy to connect, subsequent to analyze the data measured, Analysis on Fault Diagnosis is also convenient for grasping
Make.
Finally, this measuring mechanism can also provide technical support for the exploitation of subsequent speed changer.It can be right using mechanism of the present invention
New design secondary box of gearbox jackshaft test run state is monitored in real time, to understand secondary box of gearbox transmission situation and can
The problem of capable of existing, provides new product designs efficiency and qualification rate.
Detailed description of the invention
Fig. 1 is prior art odd-side intermediate shaft structure schematic diagram；
Fig. 2 is odd-side intermediate shaft structure schematic diagram of the present invention；
Fig. 3 is the structural schematic diagram of revolving speed snap ring；
Fig. 4 is the assembled front view of revolving speed snap ring；
Fig. 5 is the cross-sectional view of the assembly left view of revolving speed snap ring；
Fig. 6 is the structural schematic diagram of tachometric survey code-disc；
Fig. 7 is the assembled front view of tachometric survey code-disc；
Fig. 8 is the cross-sectional view of the assembly left view of tachometric survey code-disc；
Fig. 9 is the front view of tachometric survey lid；
Figure 10 is the cross-sectional view of the left view of tachometric survey lid；
Figure 11 is the top view of tachometric survey lid.
Wherein：1- rear cover shell；2- odd-side jackshaft；3- transmission gear；4- bearing；5- bearing locating snap ring；6- jackshaft
Lid；7- jackshaft locating snap ring；8- tachometric survey lid；9- revolving speed snap ring；10- tachometric survey code-disc；11- speed probe.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing：
As shown in Figure 1, entire mechanism is located inside rear cover shell 1 for conventional commercial vehicle secondary box of gearbox intermediate shaft structure,
2 one end of jackshaft is cased with transmission gear 3, and the other end is cased with bearing 4 and jackshaft locating snap ring 7, bearing stop is provided on bearing 4
Ring 5, rear cover shell 1 are connect with intermediate shaft cap 6.
As shown in Fig. 2, mechanism of the present invention is that the speed changer based on domestic commercial vehicle major-minor case structure is developed, the machine being related to
Structure part has：Revolving speed snap ring 9 needs 2；Tachometric survey code-disc 10 needs 1；Tachometric survey lid 8 needs 1.In addition, revolution speed sensing
Device 12 can carry out purchase configuration according to data acquisition request.
4 end of non-bearing of the odd-side jackshaft 2 is provided with transmission gear 3, the card positioned at 2 bearing of odd-side jackshaft, 4 end
Revolving speed snap ring 9 is fixedly connected in slot, revolving speed snap ring 9 is bolted with tachometric survey code-disc 10, both with odd-side jackshaft 2
Coaxially；Tachometric survey lid 8 is fixedly connected with rear cover shell 1, and speed probe 12 is arranged on tachometric survey lid 8；
When vehicle operates normally, tachometric survey code-disc 10 makes rotating motion with odd-side jackshaft 2, and tachometric survey code-disc
The magnetic induction line of 10 outer rim convex key cutting speed probe 12.
As shown in figures 3-8, revolving speed snap ring 9 is semicircle snap ring, and 9 one end of revolving speed snap ring is provided with can be with card slot cooperation
Buckle, the other end are provided with the boss with the cooperation of 10 inner circle of tachometric survey code-disc, and two revolving speed snap rings 9 are opposed to be mounted in odd-side
Between in 2 card slot of axis, 10 end face of tachometric survey code-disc and revolving speed snap ring 9 are in contact with it one end end face and are correspondingly arranged on
Uniform four through-holes, for being attached using bolt.Revolving speed snap ring 9 is transmitting odd-side jackshaft for tachometric survey code-disc 10
While 2 torque, fixed function same as jackshaft locating snap ring 7 is also played.
As shown in Fig. 9, Figure 10 and Figure 11, it is provided with boss at the top of tachometric survey lid 8, top thickness is made to be greater than remaining position
Thickness, boss are provided with radial through-hole, and 12 measurement end of speed probe protrudes into through-hole, and speed probe 12 is straight down
Setting.The preferred speed probe 12 of the present embodiment is hall-effect speed sensor, after tachometric survey lid 8 is installed, enclosure interior shape
It at cavity, is rotated for tachometric survey code-disc 10, and cuts the magnetic induction line of speed probe 12.
This measuring mechanism is small and exquisite portable, facilitates analyzing and diagnosing.Mechanism of the present invention only has 5 small parts, carries convenient for outgoing
It uses；And due to installation, it is easy to connect, subsequent to analyze the data measured, Analysis on Fault Diagnosis is also convenient for operating.It protects
Existing speed changer part integrity is held, is added etc. without disassembling speed changer or carrying out machine to speed changer part to realize that measuring mechanism is solid
Even, by replacing secondary box of gearbox periphery individual part, the purpose of real-time monitoring odd-side jackshaft revolving speed can be realized, and pacify
Only axial dimension is slightly increased after dress, will not influence the normal operation of odd-side, and user can be normally carried out operation after mounting, complete
At former part can be gained after measurement.Therefore, product has been purchased to user when mechanism is installed not have an impact, and has not been done under working condition
Vehicle use is disturbed, can normally be restored to the original state after completing measurement, is almost zero on user's normal operation influence.
Mechanism measurement method is as follows：
Step 1, odd-side intermediate shaft cap 6 and jackshaft locating snap ring 7 are dismantled；
Step 2, revolving speed snap ring 9 and card slot are fixedly mounted, tachometric survey code-disc 10 and revolving speed snap ring 9 are fixedly mounted, and turn
Speed measurement lid 8 and rear cover shell 1 are fixedly mounted, and speed probe 12 is mounted on tachometric survey lid 8；
Step 3, vehicle is operated normally, tachometric survey code-disc 10 makes rotating motion with odd-side jackshaft 2, and revolving speed
The magnetic induction line for measuring the outer rim convex key cutting speed probe 12 of code-disc 10 generates electromagnetic induction, to form electric signal to centre
Axis operating status real time monitoring.
Detailed process is as follows：
The mounting means of mechanism is very convenient simple.When needing to install mechanism of the present invention, need to remove and speed changer
The odd-side intermediate shaft cap 6 that rear cover shell 1 cooperates removes its bolt that is connected, then removes the jackshaft for positioning odd-side jackshaft 2
Locating snap ring 7, by two opposed annular grooves loaded on odd-side jackshaft 2 of odd-side jackshaft revolving speed snap ring 9, blending bolt nut will
Two odd-side jackshaft revolving speed snap rings 9 are connected, and are then fixed on tachometric survey code-disc 10 on revolving speed snap ring 9 with bolt, will turn
Speed measurement lid 8 and rear cover shell 1 are connected, and install the bolt that is connected, and hall-effect speed sensor is finally loaded on tachometric survey lid 8
On, mechanism just completes installation.
When vehicle operates normally, tachometric survey code-disc 10 is fixed on revolving speed snap ring 9, and revolving speed snap ring 9 is fixed on pair
Case jackshaft 2, therefore tachometric survey code-disc 10 makes rotating motion with odd-side jackshaft 2.The outer rim convex key of tachometric survey code-disc 10
The magnetic induction line of cutting hall-effect speed sensor makes it generate electromagnetic induction, to form electric signal real time monitoring odd-side jackshaft
Operating status.The outer rim convex key quantity of tachometric survey code-disc 10 can voluntarily be set according to the accuracy requirement that need to acquire data
Meter.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (9)
1. a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism, which is characterized in that including revolving speed snap ring (9),
Tachometric survey code-disc (10), tachometric survey lid and speed probe (12)；
Described odd-side jackshaft (2) one end is connect by bearing (4) with rear cover shell (1), and odd-side jackshaft (2), which is provided with, to be used for
The card slot that jackshaft locating snap ring (7) carry out stop to odd-side jackshaft (2) is installed, revolving speed snap ring (9) is fixedly connected with card slot, is turned
Fast snap ring (9) is fixedly connected with tachometric survey code-disc (10), both coaxial with odd-side jackshaft (2)；Tachometric survey lid (8) with
Rear cover shell (1) is fixedly connected, and speed probe (12) is arranged on tachometric survey lid (8)；
When vehicle operates normally, tachometric survey code-disc (10) makes rotating motion with odd-side jackshaft (2), and tachometric survey code-disc
(10) magnetic induction line of outer rim convex key cutting speed probe (12).
2. a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism according to claim 1, feature exist
In revolving speed snap ring (9) is semicircle snap ring, and two revolving speed snap rings (9) are opposed to be mounted in odd-side jackshaft (2) card slot.
3. a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism according to claim 1, feature exist
In described revolving speed snap ring (9) one end is provided with the buckle that can cooperate with card slot, and the other end is provided with and tachometric survey code-disc
(10) boss of inner circle cooperation.
4. a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism according to claim 1, feature exist
The corresponding through-hole being evenly arranged with for connection in one end end face is in contact with it in, tachometric survey code-disc (10) and revolving speed snap ring (9).
5. a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism according to claim 1, feature exist
In tachometric survey lid (8) is provided with radial through-hole, and speed probe (12) measurement end protrudes into through-hole.
6. a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism according to claim 5, feature exist
In tachometric survey lid (8) top is provided with boss, and through-hole is through setting at boss.
7. a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism according to claim 5, feature exist
In speed probe (12) is vertically arranged.
8. a kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism according to claim 1, feature exist
In the speed probe (12) is hall-effect speed sensor.
9. a kind of portable commercial vehicle odd-side jackshaft revolving speed method for fast measuring, based on described in claim 1-8 any one
Measuring mechanism, which is characterized in that include the following steps,
Step 1, odd-side intermediate shaft cap (6) and jackshaft locating snap ring (7) are dismantled；
Step 2, revolving speed snap ring (9) and card slot being fixedly mounted, tachometric survey code-disc (10) and revolving speed snap ring (9) are fixedly mounted,
Tachometric survey lid (8) and rear cover shell (1) are fixedly mounted, and speed probe (12) is mounted on tachometric survey lid (8)；
Step 3, vehicle is operated normally, tachometric survey code-disc (10) makes rotating motion with odd-side jackshaft (2), and revolving speed
The magnetic induction line for measuring outer rim convex key cutting speed probe (12) of code-disc (10) generates electromagnetic induction, to form electric signal pair
Jackshaft operating status real time monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010605.3A CN108896781A (en) | 2018-08-31 | 2018-08-31 | A kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811010605.3A CN108896781A (en) | 2018-08-31 | 2018-08-31 | A kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism and method |
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| CN108896781A true CN108896781A (en) | 2018-11-27 |
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| CN201811010605.3A Pending CN108896781A (en) | 2018-08-31 | 2018-08-31 | A kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391086A (en) * | 2021-06-18 | 2021-09-14 | 宁波中车时代传感技术有限公司 | Shaft end rotating speed sensor and manufacturing method thereof |
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| US20100176797A1 (en) * | 2007-06-01 | 2010-07-15 | Zf Friedrichshafen Ag | Device for determining the rotational speed of a transmission shaft |
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| CN106771318A (en) * | 2016-11-22 | 2017-05-31 | 中国航空工业集团公司上海航空测控技术研究所 | Rotation-speed measuring device during a kind of high-precision real of hollow structure |
| CN208860865U (en) * | 2018-08-31 | 2019-05-14 | 西安法士特汽车传动有限公司 | A kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism |
-
2018
- 2018-08-31 CN CN201811010605.3A patent/CN108896781A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100176797A1 (en) * | 2007-06-01 | 2010-07-15 | Zf Friedrichshafen Ag | Device for determining the rotational speed of a transmission shaft |
| CN101819091A (en) * | 2010-03-25 | 2010-09-01 | 重庆大学 | Combined intelligent monitoring bearing |
| CN103994212A (en) * | 2014-05-13 | 2014-08-20 | 陕西法士特齿轮有限责任公司 | System and method for monitoring range gear transmission gear |
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| CN106771318A (en) * | 2016-11-22 | 2017-05-31 | 中国航空工业集团公司上海航空测控技术研究所 | Rotation-speed measuring device during a kind of high-precision real of hollow structure |
| CN208860865U (en) * | 2018-08-31 | 2019-05-14 | 西安法士特汽车传动有限公司 | A kind of portable commercial vehicle odd-side jackshaft revolving speed rapid survey mechanism |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391086A (en) * | 2021-06-18 | 2021-09-14 | 宁波中车时代传感技术有限公司 | Shaft end rotating speed sensor and manufacturing method thereof |
| CN113391086B (en) * | 2021-06-18 | 2023-11-03 | 宁波中车时代传感技术有限公司 | Shaft end rotating speed sensor and manufacturing method |
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