CN208947303U - Transmission mechanism and electron assistant braking system - Google Patents
Transmission mechanism and electron assistant braking system Download PDFInfo
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- CN208947303U CN208947303U CN201821496063.0U CN201821496063U CN208947303U CN 208947303 U CN208947303 U CN 208947303U CN 201821496063 U CN201821496063 U CN 201821496063U CN 208947303 U CN208947303 U CN 208947303U
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- worm screw
- transmission mechanism
- yielding coupling
- worm
- servo motor
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- 230000008878 coupling Effects 0.000 claims description 22
- 238000010168 coupling process Methods 0.000 claims description 22
- 238000005859 coupling reaction Methods 0.000 claims description 22
- 238000005096 rolling process Methods 0.000 claims description 10
- 241000237858 Gastropoda Species 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 9
- 230000001939 inductive effect Effects 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 8
- 230000006698 induction Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
A kind of transmission mechanism, worm screw, two worm gears engaged respectively with the two sides of worm screw including the output axis connection with servo motor, two respectively with the shaft that is fixedly connected in the middle part of two worm gears, the gear at two tops for being sheathed on two shafts respectively and two rack gears that slide assemblies two sides are engaged and be individually fixed in gear.So avoidable slide assemblies are biased to, the interference for improving mobile efficiency and reliability, improving control accuracy, avoiding other active forces.The utility model also provides a kind of electron assistant braking system.
Description
Technical field
The utility model relates to automobile brake technical field, especially a kind of transmission mechanism and electron assistant braking system.
Background technique
Existing brake system of car, by driver's brake pedal, so that hydraulic in hydraulic cylinder changes,
Hydraulic pressure signal is transferred to braking system, brakes to control brake(-holder) block.In braking process, slide assemblies are made for transmitting
Firmly, it tends to be biased to, mobile efficiency and reliability are lower, and control accuracy is lower, and are easy by external force
Interference.
Utility model content
In view of this, the present invention provides one kind, and slide assemblies to be avoided to be biased to, and improves mobile efficiency and reliable
Property, improve control accuracy, the transmission mechanism for the interference for avoiding other active forces and electron assistant braking system, with solve
The above problem.
A kind of transmission mechanism, for connecting servo motor (30) and slide assemblies (10), including with servo motor (30)
Export the worm screw (41) of axis connection, two worm gears (42) engaged respectively with the two sides of worm screw (41), two respectively with two snails
The shaft (43) that is fixedly connected in the middle part of wheel (42), the gear (44) at two tops for being sheathed on two shafts (43) respectively and with
Gear (44) engages and is individually fixed in two rack gears (45) of slide assemblies (10) two sides.
Further, the shaft (43) is vertical with worm screw (41).
Further, the rack gear (45) is parallel with worm screw (41).
Further, the upper and lower ends of the shaft (43) are equipped with bearing.
Further, Motor connecting device, the motor are provided between servo motor (30) and transmission mechanism (40)
Attachment device includes yielding coupling (33), is located at yielding coupling (33) external locking plug screw (34), servo motor (30)
Output shaft (31) distal end faces on circumferentially edge be equidistantly provided with several first lobes (32), yielding coupling (33)
Circumferential side wall on be provided with the pawls (331) of several protrusions, form gap between adjacent pawl (331), output shaft (31) if
Dry first lobe (32) are respectively positioned in the gap between the pawl (331) of yielding coupling (33), the middle part tool of locking plug screw (34)
There is accommodating cavity, yielding coupling (33) is located in accommodating cavity, and worm screw (41) is towards on the end face of the first end of servo motor (30)
Circumferentially edge is equidistantly provided with several second lobes (411), the first end of worm screw (41) pass through locking plug screw (34) and if
Dry second lobe (411) are respectively positioned in the gap between the pawl (331) of yielding coupling (33).
Further, the quantity of first lobe (32) is equal to the quantity of the second lobe (411), the yielding coupling
(33) quantity of pawl (331) is twice of the first lobe (32) or the second lobe (411).
Further, the Motor connecting device further includes that turning set is set to worm screw (41) close to servo motor (30) one
Ball bearing (35) in the outer perimeter wall at end and worm screw (41) are sheathed on far from the outer perimeter wall of servo motor (30) one end
Rolling bearing (36), the second end of worm screw (41) has cylindrical section (412), and cylindrical section (412) passes through rolling bearing (36) simultaneously
It is rotatablely connected with rolling bearing (36), worm screw (41) is additionally provided with the bearing groove of ring-shaped depression in the circumferential side wall of first end
(413), ball bearing (35) is sheathed at the bearing groove (413) of worm screw (41).
A kind of electron assistant braking system has transmission mechanism as described above.
Compared with prior art, the transmission mechanism of the utility model includes the snail with the output axis connection of servo motor (30)
Bar (41), two worm gears (42) engaged respectively with the two sides of worm screw (41), two it is solid with the middle part of two worm gears (42) respectively
Surely the shaft (43) connected, the gear (44) at two tops for being sheathed on two shafts (43) respectively and is engaged with gear (44)
And it is individually fixed in two rack gears (45) of slide assemblies (10) two sides.So avoidable slide assemblies are biased to, and movement is improved
Efficiency and reliability, the interference that improves control accuracy, avoid other active forces.The utility model also provides a kind of electricity
Sub- auxiliary braking system.
Detailed description of the invention
The embodiments of the present invention are described below in conjunction with attached drawing, in which:
Fig. 1 is the stereoscopic schematic diagram of electron assistant braking system provided by the utility model.
Fig. 2 is that electron assistant braking system provided by the utility model removes the stereoscopic schematic diagram after outer cover.
Fig. 3 is the stereoscopic schematic diagram of the slide assemblies and inductive component in Fig. 2.
Fig. 4 is the perspective view of the explosion of the slide assemblies in Fig. 2.
Fig. 5 is the stereoscopic schematic diagram of the first sliding bar and sensor block in Fig. 2.
Fig. 6 is the stereoscopic schematic diagram of the sliding shoe in Fig. 2.
Fig. 7 is the schematic internal view of the sliding shoe in Fig. 2.
Fig. 8 is the enlarged diagram of part A in Fig. 2.
Fig. 9 is the connection schematic diagram of the hydraulic cylinder and slide assemblies in Fig. 2.
Figure 10 is the connection schematic diagram of the servo motor and transmission mechanism in Fig. 2.
Figure 11 is the stereoscopic schematic diagram of the servo motor in Fig. 2.
Specific embodiment
Specific embodiment of the utility model is further elaborated below based on attached drawing.It should be understood that
The explanation of the utility model embodiment is not used to herein to limit the protection scope of the utility model.
Fig. 1 and Fig. 2 is please referred to, electron assistant braking system provided by the utility model includes slide assemblies 10, sense group
Part 20, servo motor 30, is connect with the transmission mechanism 40 of the output axis connection of servo motor 30, with slide assemblies 10 controller
Hydraulic cylinder 50, the sliding outer cover 60 for coating slide assemblies 10 and the top of transmission mechanism 40, and for coating driver
The transmission outer cover 70 of 40 bottom of structure.
The first end of slide assemblies 10 is connect with external brake pedal, and second end is connect with the piston of hydraulic cylinder 50, liquid
Cylinder pressure 50 is connect by hydraulic circuit with external braking system, and inductive component 20 is connect with controller, for incuding Slide Group
Movable signal is simultaneously sent to controller by the movement of the section components of part 10, and controller is according to movable signal and vehicle body other letters
Number, such as throttle signal, the output shaft rotation of servo motor 30 is controlled, servo motor 30 drives Slide Group by transmission mechanism 40
Part 10 is mobile, drives the piston of hydraulic cylinder 50 mobile when slide assemblies 10 are mobile, hydraulic cylinder 50 is controlled by hydraulic circuit and braked
System acting.
Please continue to refer to Fig. 3 to Fig. 5, slide assemblies 10 include pedal connector 11, connect with pedal connector 11 the
One sliding bar 12, sliding shoe 13 and the first spring 15 being sheathed on the first sliding bar 12.Pedal connector 11 is sliding far from first
One end of lever 12 is connect with external brake pedal.
Pedal connector 11 includes articulated section 111 and joint interconnecting piece 112, and articulated section 111 and external connecting rod are hinged, even
Bar is connect with external brake pedal.Joint interconnecting piece 112 is equipped with the first joint slot far from the end face of articulated section 111.
First sliding bar 12 is equipped with the first spherical joint 121 towards one end of pedal connector 11, the first sliding bar 12
Middle part is equipped with the snap ring 122 being radially provided projectingly, the circumference of first one end of sliding bar 12 far from pedal connector 11
Side wall is equipped with annular groove 123.First spherical joint 121 is located in the first joint slot of joint interconnecting piece 112, sliding shoe 13
It is equipped with the first groove towards the end face of the first sliding bar 12, the first sliding bar 12 is located at far from one end of pedal connector 11 to be slided
In first groove of motion block 13, the first end of the first spring 15 is abutted with snap ring 122, the first groove of second end and sliding shoe 13
Inner bottom wall abuts.
Referring to FIG. 9, connecting device of hydraulic cylinder is provided between slide assemblies 10 and hydraulic cylinder 50, hydraulic cylinder connection dress
Second for setting the positioning plate 16 of the side including being set to the first sliding bar 12 of separate direction of sliding shoe 13, being connect with positioning plate 16
Sliding bar 14, the second spring 17 being sheathed on the second sliding bar 14 and the spring fitting 18 being connect with hydraulic cylinder housing, the
The first end of two springs 17 is abutted with sliding shoe 13, and second end is abutted with spring fitting 18.Second sliding bar 14 is far from sliding
One end of block 13 is connect with the piston of hydraulic cylinder 50.In present embodiment, hydraulic cylinder housing is additionally provided in the outside of piston and leads
To sleeve 51.Second sliding bar 14 can be located in pilot sleeve 51 with sliding axially.
Positioning plate 16 is equipped with second joint slot towards the side of the second sliding bar 14, and the second sliding bar 14 is towards sliding shoe 13
One end be equipped with the second spherical joint 141, far from sliding shoe 13 one end be equipped with third spherical joint 142.The work of hydraulic cylinder 50
Plug 51 is equipped with third joint slot towards one end of sliding shoe 13, and the second spherical joint 141 is located in second joint slot, and third is spherical
Joint 142 is located in the third joint slot of piston.
Connecting device of hydraulic cylinder make be between slide assemblies 10 and hydraulic cylinder 50 activity and it is detachably connected, convenient for peace
Dress and disassembly, while pilot sleeve 51 plays preferable guiding role to the movement of the second sliding bar 14, avoids the second sliding bar
14 biasings improve piston mobile reliability and efficiency.Second spring 17 makes sliding shoe 13 upon completion of the braking can be quick
Ground restores to initial position, and spring fitting 18 is that second spring 17 provides support and protects hydraulic cylinder housing, so that hydraulic cylinder
Shell by second spring 17 from being scratched.
Hydraulic cylinder housing, spring fitting 18 and sliding outer cover 60 are also connected by screw thread.
Inductive component 20 includes sensor block 21 and contactless inductive unit 22, contactless inductive 22 relative induction block 21 of unit
Interval setting, and be set on sliding outer cover 60.Sensor block 21 includes the main body block 211 being mutually connected vertically and extension 212,
Main body block 211 is slideably embedded on the circumferential side wall of sliding shoe 13, the outside in axle center of the main body block 211 far from sliding shoe 13
Wall is equipped with induction groove 214, and extension 212 is connected with clamping piece 213 close to the end in the axle center of sliding shoe 13, is clamped piece
213 end is equipped with card slot 214, and is clamped piece 213 and forms two stabilizer blades in card slot 214.It is clamped piece 213 and the first sliding bar 12
Annular groove 123 be clamped so that two stabilizer blades are located at the two sides of annular groove 123.In present embodiment, non-contact sense
Answering unit 22 is photoelectric sensor, is used for sensitive groove 214.
Fig. 6 and Fig. 7 is please referred to, sliding shoe 13 includes sliding inner core 131, is set to sliding inner core 131 far from the first sliding
The closing panel 132 of 12 one end of bar and the sliding sheath body 134 for being coated on 131 outside of sliding inner core, slide the circumference of inner core 131
Side wall is equipped with strip hole 133, and the first groove is opened in sliding inner core 131 towards the side of the first sliding bar 12, sensor block 21
Extension 212 and clamping piece 213 pass through strip hole 133.Positioning plate 16 is fixedly connected with closing panel 132.
Slide assemblies 10 are realized to be detachably connected with brake pedal, and realizes the installation and function of inductive component 20
Realize, when the first sliding bar 12 is mobile inductive component 20 can actual induction its movement, while sliding shoe 13 can be opposing stationary, such as
This reduces the load when movement of the first sliding bar 12, improves inductive component 20 and incudes the accurate of the first sliding bar 12 movement
Degree.First spring 15 make the first sliding bar 12 after driver loosens the brake can fast quick-recovery to initial position.
With continued reference to FIG. 8, transmission mechanism 40 includes 41, two difference of worm screw with the output axis connection of servo motor 30
42, two shafts being fixedly connected respectively with the middle part of two worm gears 42 43 of the worm gear engaged with the two sides of worm screw 41, two points
It is not sheathed on the gear 44 at the top of two shafts 43 and the sliding sheath body of sliding shoe 13 is engaged and be individually fixed in gear 44
Two rack gears 45 of 134 two sides.
Sliding outer cover 60 is located at the outside of transmission mechanism 40 and coats gear 44, rack gear 45 and the shaft 43 of transmission mechanism 40
Top.It is driven the bottom that outer cover 70 coats the output shaft of servo motor 30, worm screw 41, worm gear 42 and shaft 43.Slide outer cover
60 bottom is connect with the top of transmission outer cover 70.
Shaft 43 is vertical with worm screw 41, and rack gear 45 is parallel with worm screw 41, and the upper and lower ends of shaft 43 are equipped with bearing, improves
The stability of shaft 43.
In this way, transmission mechanism 40 can drive sliding shoe 13 mobile from two sides respectively, avoids sliding shoe 13 from being biased to, improve shifting
Dynamic efficiency and reliability improves the accuracy of control sliding shoe 13, avoids it by the cooperation of gear 44 and rack gear 45
His active force acts on sliding shoe 13 and bring is interfered.
Figure 10 and Figure 11 is please referred to, Motor connecting device, motor are provided between servo motor 30 and transmission mechanism 40
Attachment device include yielding coupling 33, the locking plug screw 34 outside yielding coupling 33, turning set be set to worm screw 41 lean on
Ball bearing 35 in the outer perimeter wall of nearly 30 one end of servo motor and worm screw 41 is sheathed on far from the outer of 30 one end of servo motor
Rolling bearing 36 on the peripheral wall of side.
Circumferentially edge is equidistantly provided with several first lobes 32 in the distal end faces of the output shaft 31 of servo motor 30,
It is provided with the pawl 331 of several protrusions in the circumferential side wall of yielding coupling 33, forms gap, output shaft between adjacent pawl 331
31 several first lobes 32 are respectively positioned in the gap between the pawl 331 of yielding coupling 33.The middle part of locking plug screw 34 has
Cavity, yielding coupling 33 are located in cavity.
Worm screw 41 is towards circumferentially to be equidistantly provided with several second prominent at edge on the end face of the first end of servo motor 30
Tooth 411, the first end of worm screw 41 is across locking plug screw 34 and several second lobes 411 are respectively positioned on the pawl 331 of yielding coupling 33
Between gap in, the second end of worm screw 41 has cylindrical section 412, and cylindrical section 412 passes through rolling bearing 36 and and rolling bearing
36 rotation connections.
The quantity of first lobe 32 is equal to the quantity of the second lobe 411, and the quantity of the pawl 331 of yielding coupling 33 is first
Twice of lobe 32 or the second lobe 411.
Worm screw 41 is additionally provided with the bearing groove 413 of ring-shaped depression in the circumferential side wall of first end, and ball bearing 35 is arranged
At the bearing groove 413 of worm screw 41.Ball bearing 35 and rolling bearing 36 carry out rotational support to worm screw 41 from both ends respectively, mention
The high stability and reliability of worm screw 41.
Motor connecting device realizes being detachably connected between servo motor 30 and transmission mechanism 40, is easily installed and tears open
It unloads, yielding coupling 33 can ensure that effective transmitting of rotation.
The shell of servo motor 30 is threadedly coupled by screw with transmission outer cover 70, the shell and transmission in servo motor 30
Sealing ring 37 is additionally provided between outer cover 70, to improve the leakproofness between servo motor 30 and transmission mechanism 40.
The course of work of electron assistant braking system provided by the utility model is illustrated below, driver steps on system
Dynamic pedal, the first sliding bar 12 will be mobile towards sliding shoe 13, so that sensor block 21 follows movement, contactless inductive unit 22 is detectd
The moving distance of sensor block 21 is surveyed, and movable signal is sent to controller, controller is according to movable signal and vehicle body other letters
The output shaft rotation of number control servo motor 30, output shaft drives worm screw 41 to rotate, to drive two worm gears 42 to rotate, in turn
So that two shafts 43 rotate, two gears 44 are driven, two gears 44 drive two rack gears for being fixed on 13 two sides of sliding shoe
45 is mobile towards hydraulic cylinder 50, and two rack gears 45 drive sliding shoe 13 mobile, so that the second sliding bar 14 is mobile, second
Sliding bar 14 drives the piston of hydraulic cylinder 50 to move in hydraulic cylinder 50, so that the hydraulic increase in hydraulic cylinder 50, hydraulic
Cylinder 50 controls braking system by hydraulic circuit and is braked.
Compared with prior art, the transmission mechanism of the utility model includes the worm screw with the output axis connection of servo motor 30
41, what two 42, two, worm gears engaged respectively with the two sides of worm screw 41 were fixedly connected with the middle part of two worm gears 42 respectively turns
Axis 43, the gear 44 at two tops for being sheathed on two shafts 43 respectively and engages with gear 44 and is individually fixed in slide assemblies
Two rack gears 45 of 10 two sides.So avoidable slide assemblies are biased to, and are improved mobile efficiency and reliability, are improved control
Accuracy, the interference for avoiding other active forces.The utility model also provides a kind of electron assistant braking system.
The above is only the preferred embodiments of the utility model, are not used to the limitation protection scope of the utility model, any
Modification, equivalent replacement or improvement within the spirit of the present invention etc. are all covered in the scope of the claims of the utility model.
Claims (8)
1. a kind of transmission mechanism, for connecting servo motor (30) and slide assemblies (10), it is characterised in that: including electric with servo
The worm screw (41) of the output axis connection of machine (30), two engaged respectively with the two sides of worm screw (41) worm gear (42), two difference
The shaft (43) being fixedly connected in the middle part of two worm gears (42), the gear at two tops for being sheathed on two shafts (43) respectively
(44) two rack gears (45) of slide assemblies (10) two sides and are engaged and are individually fixed in gear (44).
2. transmission mechanism as described in claim 1, it is characterised in that: the shaft (43) is vertical with worm screw (41).
3. transmission mechanism as described in claim 1, it is characterised in that: the rack gear (45) is parallel with worm screw (41).
4. transmission mechanism as described in claim 1, it is characterised in that: the upper and lower ends of the shaft (43) are equipped with bearing.
5. transmission mechanism as described in claim 1, it is characterised in that: set between servo motor (30) and transmission mechanism (40)
It is equipped with Motor connecting device, the Motor connecting device includes yielding coupling (33), is located at yielding coupling (33) outside
It locks plug screw (34), circumferentially edge is equidistantly provided with several the in the distal end faces of the output shaft (31) of servo motor (30)
One lobe (32), is provided with the pawl (331) of several protrusions in the circumferential side wall of yielding coupling (33), adjacent pawl (331) it
Between form gap, between several first lobes (32) of output shaft (31) are respectively positioned between the pawl (331) of yielding coupling (33)
In gap, the middle part of locking plug screw (34) has accommodating cavity, and yielding coupling (33) is located in accommodating cavity, and worm screw (41) is towards servo
Circumferentially edge is equidistantly provided with several second lobes (411) on the end face of the first end of motor (30), and the of worm screw (41)
One end is across locking plug screw (34) and between several second lobes (411) are respectively positioned on the pawl (331) of yielding coupling (33)
In gap.
6. transmission mechanism as claimed in claim 5, it is characterised in that: the quantity of first lobe (32) is equal to the second lobe
(411) quantity, the quantity of the pawl (331) of the yielding coupling (33) are the first lobe (32) or the second lobe (411)
Twice.
7. transmission mechanism as claimed in claim 5, it is characterised in that: the Motor connecting device further includes that turning set is set to snail
Ball bearing (35) of the bar (41) in the outer perimeter wall of servo motor (30) one end and worm screw (41) are sheathed on far from servo
The second end of rolling bearing (36) in the outer perimeter wall of motor (30) one end, worm screw (41) has cylindrical section (412), cylindrical section
(412) rolling bearing (36) are passed through and are rotatablely connected with rolling bearing (36), worm screw (41) is in the circumferential side wall of first end
It is additionally provided with the bearing groove (413) of ring-shaped depression, ball bearing (35) is sheathed at the bearing groove (413) of worm screw (41).
8. a kind of electron assistant braking system, it is characterised in that: have such as the described in any item transmission mechanisms of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821496063.0U CN208947303U (en) | 2018-09-13 | 2018-09-13 | Transmission mechanism and electron assistant braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821496063.0U CN208947303U (en) | 2018-09-13 | 2018-09-13 | Transmission mechanism and electron assistant braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208947303U true CN208947303U (en) | 2019-06-07 |
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ID=66737804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821496063.0U Active CN208947303U (en) | 2018-09-13 | 2018-09-13 | Transmission mechanism and electron assistant braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208947303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492246A (en) * | 2019-08-13 | 2019-11-22 | 武汉虹信通信技术有限责任公司 | Antenna for base station lower decline angle adjusting transmission mechanism and antenna for base station |
-
2018
- 2018-09-13 CN CN201821496063.0U patent/CN208947303U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492246A (en) * | 2019-08-13 | 2019-11-22 | 武汉虹信通信技术有限责任公司 | Antenna for base station lower decline angle adjusting transmission mechanism and antenna for base station |
| CN110492246B (en) * | 2019-08-13 | 2021-05-28 | 中信科移动通信技术有限公司 | Base station antenna electric downtilt angle adjusting transmission mechanism and base station antenna |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Transmission mechanism and electronic assisted braking system Effective date of registration: 20230328 Granted publication date: 20190607 Pledgee: Zhejiang Jiashan rural commercial bank Limited by Share Ltd. science and technology sub branch Pledgor: ZHEJIANG CYNSON AUTOMOBILE TECHNOLOGY CO.,LTD. Registration number: Y2023450000041 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20190607 Pledgee: Zhejiang Jiashan rural commercial bank Limited by Share Ltd. science and technology sub branch Pledgor: ZHEJIANG CYNSON AUTOMOBILE TECHNOLOGY CO.,LTD. Registration number: Y2023450000041 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |