CN105538235B - A kind of assembly tooling of cylinder interior compression spring and its assembly method - Google Patents
A kind of assembly tooling of cylinder interior compression spring and its assembly method Download PDFInfo
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- CN105538235B CN105538235B CN201610047551.2A CN201610047551A CN105538235B CN 105538235 B CN105538235 B CN 105538235B CN 201610047551 A CN201610047551 A CN 201610047551A CN 105538235 B CN105538235 B CN 105538235B
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- pressure head
- compression spring
- spring
- cylinder body
- spring pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
- Automatic Assembly (AREA)
Abstract
The invention provides a kind of assembly tooling of cylinder interior compression spring and assembly method, belong to Hydraulic Elements mounting technology field.The assembly tooling includes positioning component and pressure head component, the pressure head component includes spring pressure head and attachment screw, the spring pressure head is the hollow cylinder of split-type structural, it is the fan-shaped conical surface per the upper end of partial spring pressure head, the attachment screw is through the spring pressure head and treats shock mount, is spun solid in the cylindricality internal thread hole of positioning component center；By screwing attachment screw, guide pin bushing and spring pressure head are pressed down against compression spring, and after the circlip for hole groove exposed in cylinder body is compressed to, circlip for hole is put into, and unscrew attachment screw, remove spring pressure head.It can reach the purpose that compression spring is installed in cylinder body.The present invention is simple in construction, it is easy to left-hand seat, than existing installation compression spring means, can be effectively reduced operation difficulty, improve efficiency of assembling and assembly precision.
Description
Technical field
The present invention relates to Automatic manual transmission field, the assembly tooling of more particularly to a kind of cylinder interior compression spring and its dress
Method of completing the square, belongs to Hydraulic Elements mounting technology field.
Background technology
In Automatic manual transmission field, it often may require that and compression spring assembled in axle class or hole, and it is used or hole with axle
Fixed with circlip.It is difficult to make its assembling in place that such compression spring, which is assembled, under normal artificial operation.
For example, the cylinder interior in plunger pump, the assembling of compression spring is extremely difficult.There are three grooves at cylinder body spline, circle
Zhou Junbu, for placing three pieces of thimbles, thimble needs recoil when withstanding front part, after compression spring is just to provide for
Recoil and be set into cylinder interior.Compression spring needs one end to push down rounded washers, and rounded washers are to be distributed in flower in cylinder body
Three pieces of thimbles in key mouthful groove, the other end needs to be blocked by circlip for hole.
The operation that compression spring is fixed in cylinder body to assembling compression spring and with circlip for hole, conventional assembling is very
Difficulty is assembled into position, if being operated using brute-force, because this assembly technology is coarse, thimble position can be caused to have offset,
Precision is inadequate and operating efficiency is low.The corresponding mounting method that such cylinder body is built into compression spring is not previously announced, through examination
Checking is bright, if spring is squeezed into cylinder body using assembly tooling, but it is difficult to complete pressuring head part dismounting after installing.
Therefore, need a kind of assembly tooling for cylinder interior compression spring of design badly, be easily achieved assembly technology, reach
To assembling it is accurate in place, be easy to personnel to install, and pressuring head part convenient disassembly, it is possible to increase the purpose of operating efficiency.
The content of the invention
For the deficiency of existing mounting technology, it can save manpower the invention provides one kind, improve assembly precision and pressure
The assembly tooling of the cylinder interior compression spring of the convenient dismounting of head part and its assembly method.
Technical scheme is as follows：A kind of assembly tooling of cylinder interior compression spring, including thimble and hole bullet
Property back-up ring, the thimble is arranged in the thimble groove of cylinder base spline mouthful, and spring installation is vertically arranged with the cylinder body
Circlip for hole groove is provided with the top of groove, the spring mounting groove, the assembly tooling includes positioning component and pressure head
Component, cylinder body is arranged on the top of the positioning component, and the pressure head component includes spring pressure head and attachment screw, the spring
Pressure head is the hollow cylinder of split-type structural, is the fan-shaped conical surface per the upper end of partial spring pressure head, the side of the fan-shaped conical surface
Edge exceeds the external diameter of hollow cylinder, the upper end of the nut extrusion spring pressure head of the attachment screw, the nail portion of the attachment screw
It is connected through hollow cylinder with positioning component.
Technical scheme also includes:The spring pressure head is the vertical split knot that 2 to 4 sizes distinguish identical
Structure is constituted, and is provided with concave station on the inside of each Split type structure upper end.It is 2 to 4 sizes when spring pressure head is arranged to quantity
Respectively during the vertical Split type structure composition of identical, operate more convenient, if spring pressure head Split type structure is excessive, first
Assembling is difficult, the unnecessary repetition of operation, the size of the spring pressure head Split type structure phase with increasing for quantity second can be caused
It should diminish.Concave station set by spring pressure head upper end is used for placing packing ring or guide pin bushing, facilitates the use of attachment screw, makes assembling
Tool structure is more reasonable.
Technical scheme also includes:The spring pressure head is preferably the vertical Split type structure of 2 size identicals
Composition.When spring pressure head is two size identical Split type structure compositions, the use of spring pressure head is the most convenient.
Technical scheme also includes:Each Split type structure of the spring pressure head using the central shaft of hollow cylinder as
Center is uniformly placed on the inner ring side of compression spring to be assembled, and space is left between adjacent spring pressure head Split type structure.
Each Split type structure of spring pressure head uniformly makes compression spring uniform force, convenient for assembly, is spaced relationship to so that taking out bullet
More simple possible during spring pressure head.
Technical scheme also includes:The positioning component includes base and positioning seat, and the positioning seat passes through tight
Firmware is fixed on the base, and positioning seat newel is provided with the middle part of the positioning seat.When no operating desk to implement the cylinder
When internal portion's compression spring assembly tooling, described base can play good support firm effect.
Technical scheme also includes:Internal thread hole is provided with the positioning seat newel.The internal thread hole
It is rotated with for attachment screw, pressuring head part can be enable more steady when being pressed down against compression spring, reduces operating error.
Technical scheme also includes:The size of the external diameter of the positioning seat newel and the spline mouthful of cylinder body is mutually fitted
Should, the race diameter of the positioning seat and the gabarit size of cylinder body are adapted, and positioning seat height and cylinder body bottom height
Degree is adapted.The construction of positioning seat cause operation when, cylinder body can held stationary, play good locating effect.
Technical scheme also includes:The base is integrally formed with positioning seat.There is the suitable assembly tooling
During operating desk, positioning seat is integrally formed with base, reduces manufacture craft, simplifies operating procedure.
Technical scheme also includes:The attachment screw passes through the compression spring, spring pressure head, is spun solid at institute
In the internal thread hole for stating positioning seat newel.By means of the construction of attachment screw, make it while moving downward, spring pressure head
Also move downward therewith, extrude compression spring, than existing utilization manpower extrude compression spring by force and enter cylinder body, more facilitate
It is laborsaving.
Technical scheme also includes:The pressuring head part includes guide pin bushing, and guide pin bushing is put into along spring pressure head inwall, made
Its top is against on the concave station of spring pressure head formation.The scope of application of guide pin bushing is wider, convenient material drawing, can make connection using guide pin bushing
The direction of screw is not susceptible to skew.
Technical scheme also includes:A kind of assembly method of cylinder interior compression spring, it is characterised in that：It is described
Assembly method the step of be：
1）In the thimble groove that three pieces of thimbles are fixed on to cylinder body internal spline mouthful with flexible fastening ring, then by circular pad
Circle is put in cylinder body, and is pressed in above three pieces of thimbles, is adjusted the cooperation of rounded washers and three pieces of thimbles, will then be compressed bullet
Spring is put in cylinder body, the lower end of compression spring is in contact with rounded washers, forms preliminary combination；
2）Hand presses compression spring, and preliminary gang flipping now is put on positioning seat, makes positioning seat newel（15）Set
Enter cylinder body（1）Spline mouthful；
3）Each Split type structure of spring pressure head is uniformly placed on centered on the central shaft of hollow cylinder to be assembled
On the inner ring side of compression spring, space is left between adjacent spring pressure head Split type structure；
4）By the attachment screw pass through spring pressure head hollow cylinder, extrusion spring pressure head to close to positioning component side
To motion, and it is spun solid in the internal thread hole of positioning seat newel；
5）After checking thimble and compression spring each in place, screw attachment screw with Simple spanner, compression spring therewith by
It is pressed into cylinder body, after being threaded to and exposing circlip for hole groove in cylinder body, stops screwing, with Circlip tongs by the hole bullet
Property back-up ring is placed into groove；
6）Attachment screw is unscrewed with Simple spanner opposite direction, attachment screw is removed；
7）Spring pressure head is rapped with screwdriver, is removed, the flexible fastening ring of cylinder base is further taken out, you can reach
The purpose of compression spring is installed in cylinder body.
, can be again by guide pin bushing edge after spring pressure head is placed in the step 3 of the assembly method of technical solution of the present invention
Spring pressure head inwall is put into, and its top is against on the concave station of spring pressure head upper end, and attachment screw is through bullet in the step 4
Also through guide pin bushing while spring pressure head and compression spring, in the step 6, guide pin bushing is removed therewith after attachment screw is removed.
The beneficial effects of the present invention are：Operation is laborious when spring pressure head compared to integral structure is used, be difficult to dismantle
And flexibility it is not strong the shortcomings of, when spring pressure head is set to Split type structure, after compression spring installation, spring pressure head can be according to
Secondary percussion is taken out one by one, reduces the difficulty of operation.There is the design of the fan-shaped conical surface of certain gradient spring pressure head upper end, than it
Upper end is the pressure head of plane, is more facilitated in dismounting, being rapped using screwdriver to remove, and solve existing assembly technology
In, enter by spring-compressed after cylinder body, pressuring head part phenomenon not easy to remove.The assembler of this kind of cylinder interior compression spring
Dress, it is simple in construction, it is easy to left-hand seat, and than installing the operational means of compression spring with brute-force, more precisely, reduce because of coarse peace
Error caused by dress caused by thimble skew, can be effectively reduced operation difficulty, improve efficiency of assembling and assembly precision.
Brief description of the drawings
The purpose, technical scheme and advantage of compression spring assembly tooling to make the present invention are more clearly understood, following knot
Specific accompanying drawing and specific assembly method are closed, the present invention will be described in further detail.
Fig. 1 is the cross section structure diagram of the assembly tooling of cylinder interior compression spring；
Fig. 2 is location seat structure schematic diagram；
Fig. 3 is that cylinder body installs the cross section structure diagram before pressuring head part；
Fig. 4 is spring pressure head Split type structure schematic diagram；
Fig. 5 is the structural representation of guide pin bushing；
Fig. 6 is the structural representation after installation circlip for hole；
Fig. 7 is the structural representation after cylinder body installation；
Fig. 8 is formed in one location seat structure schematic diagram；
Fig. 9 is the cross section structure diagram without using the assembly tooling of cylinder interior compression spring during guide pin bushing；
Figure 10 is the scheme of installation of the spring pressure head using vertical triad structure；
Figure 11 is cylinder body original form schematic diagram.
Wherein：1st, cylinder body, 2, guide pin bushing, 3, compression spring, 4, spring pressure head, 5, base, 6, positioning seat, 7, attachment screw,
8th, thimble, 9, rounded washers, 10, flexible fastening ring, 11, circlip for hole, 12, trip bolt, 13, be integrally formed positioning
Seat, 14, packing ring, 15, positioning seat newel, 16, concave station.
Embodiment
Below by embodiment and the present invention will be further described with reference to accompanying drawing.
A kind of assembly tooling of cylinder interior compression spring, including thimble 8 designed in the prior art and hole elasticity
Back-up ring 11, the thimble is arranged in the thimble groove of the bottom spline mouthful of cylinder body 1, and the middle part that spring is arranged in cylinder body 1 is set vertically
Circlip for hole groove, positioning component and pressure head component are provided with the top of the spring mounting groove put, the spring mounting groove,
The pressure head component includes spring pressure head 4 and attachment screw 7, and the spring pressure head 4 is the hollow cylinder of split-type structural, every portion
The upper end for dividing spring pressure head 4 is the fan-shaped conical surface, and edge exceeds the external diameter of hollow cylinder, and the nut of the attachment screw 7 is squeezed
The upper end of pressing spring pressure head, the nail portion of the attachment screw is connected through hollow cylinder with positioning component.
The positioning component of the assembly tooling includes base 5 and positioning seat 6, and the positioning seat 6 is fixed on institute by fastener
State on base 5, the middle part of positioning seat 6, which is provided with positioning seat newel 15, the positioning seat newel 15, is provided with interior spiral shell
Pit.As shown in Fig. 2 the bottom of positioning seat 6 is provided with 4 internal thread holes with the corresponding connection of the base 5, the positioning
Seat 6 is vertically fixed on the base 5 with 4 trip bolts 12.
The three pieces of thimble 8 flexible fastening rings 10 are fixed on circumference in the internal spline mouthful of cylinder body 1 as shown in figure 11 equal
In three thimble grooves of cloth, the rounded washers 9 are put in cylinder body 1, and are pressed in above three pieces of thimbles 8.Adjust circle
The cooperation of packing ring 9 and three pieces of thimbles 8, the compression spring 3 is put in cylinder body 1, makes lower end and the rounded washers of compression spring 3
9 are in contact, and form preliminary combination.
Hand presses compression spring 3, and preliminary gang flipping now is put on positioning seat 6, and the spline muzzle of cylinder body 1 enters positioning
Ensure that three pieces of thimbles 8 and flexible fastening ring 10 are not shifted in seat newel 15, assembling process.Such as Fig. 3.
Two Split type structures of spring pressure head 4 are symmetrically disposed on the inner ring side of compression spring 3 to be assembled, then will be as
Guide pin bushing 2 shown in Fig. 5, is put into along the inwall of spring pressure head 4, the top of guide pin bushing 2 is against the recessed of the formation of spring pressure head 4
On platform, the attachment screw 7 is passed through into guide pin bushing 2 and compression spring 3 afterwards, the internal thread hole of positioning seat newel 15 is spun solid at
It is interior.
After checking thimble 8 and compression spring 3 each in place, attachment screw 7 is screwed with Simple spanner, compression spring 3 is therewith
It is pressed into cylinder body 1, after the circlip for hole groove for exposing the rear end of cylinder body 1 is threaded to, stops screwing, will be described with Circlip tongs
Circlip for hole 11 is placed into groove, now in the installed entrance cylinder body of compression spring 3, such as Fig. 6.
It is rotatably connected screw 7, and attachment screw 7 and guide pin bushing 2 is removed with Simple spanner opposite direction.Due to spring pressure head 4
Upper end be the fan-shaped conical surface, removed so can be rapped two flat spring pressure heads 4 with screwdriver, the elasticity for further taking out cylinder base is consolidated
Determine ring 10, that is, complete operation, reach the purpose that compression spring 2 is installed in cylinder body 1, such as Fig. 7.
The sectional structure of the assembly tooling of whole cylinder interior compression spring, as shown in Figure 1.
On this basis, also there is second of embodiment, base 5 described in technical solution of the present invention and positioning seat 6 in the present invention
It is integrally formed.This is integrally formed positioning seat 13 equivalent to base 5 is eliminated, and chimb is added in the bottom of the positioning seat 6 of script, with
Stability when increase is used.When there is the operating desk of the suitable assembly tooling, positioning seat is integrally formed with base, and firm is same
When reduce manufacture craft, simplify operating procedure, such as Fig. 8.
In addition, in the technical scheme invented at this, also in the presence of the third embodiment.In order to save material, reduce and make work
Skill, can also remove described guide pin bushing 2, the spring pressure head 4 be changed to the spring pressure head 4 of small internal diameter into, and put on spring pressure head 4
Packing ring 14 is put, such as Fig. 9.The internal diameter of described spring pressure head 4 is too small, and pressure head should not be removed, excessive, is difficult to prop up attachment screw
7, it is difficult to coordinate in assembling process, is measured through experiment, when without using guide pin bushing 2, the internal diameter of the spring pressure head 4 is set
During 2-4mm big for external diameter than attachment screw 7, the use of the assembly tooling disclosure satisfy that.
In addition, in the inventive solutions, spring pressure head can be 2 to 4 Split type structures, be spring as shown in Figure 10
The vertical triad structure of pressure head.
The Split type structure of heretofore described Split type structure or spring pressure head is the composition knot of the Separated type spring pressure head
Structure, is a part for spring pressure head, is vertical Split type structure.
The heretofore described fan-shaped conical surface refers in the horizontal plane in sector, but has certain gradient on vertical plane
Inclined-plane, as shown in Figure 4.
It is described above, only it is presently preferred embodiments of the present invention, any formal limitation is not done to the present invention, it is all at this
Any modifications, equivalent substitutions and improvements etc. are done within the spirit and principle of invention, protection scope of the present invention is should be included in
Within.
Claims (8)
1. a kind of assembly tooling of cylinder interior compression spring, including thimble（8）And circlip for hole（11）, the thimble
（8）Installed in cylinder body（1）In the thimble groove of the spline mouthful of bottom, the cylinder body（1）Middle part is provided with spring mounting groove, the bullet
Circlip for hole groove is provided with the top of spring mounting groove, it is characterised in that：The assembly tooling includes positioning component and pressure
Head assembly；
The positioning component includes positioning seat（6）, the positioning seat（6）Middle part is provided with positioning seat newel（15）, it is described fixed
Position seat newel（15）In be provided with internal thread hole, the cylinder body（1）Positioning seat is mounted in by spline muzzle（6）Positioning seat in
Stem（15）On, the cylinder body is located at the top of positioning component；
The pressure head component includes spring pressure head（4）And attachment screw（7）, the spring pressure head（4）For the sky of split-type structural
Heart cylinder, the spring pressure head（4）Each Split type structure be uniformly placed on centered on the central shaft of hollow cylinder it is to be assembled
Compression spring（3）Inner ring side on, adjacent springs pressure head（4）Split type structure between leave space；
Each spring pressure head（4）The upper end of Split type structure be the fan-shaped conical surface, the edge of the fan-shaped conical surface exceeds open circles
The external diameter of post；
The attachment screw（7）Through the compression spring（3）With spring pressure head（4）It is spun solid at positioning seat newel（15）It is interior
In screwed hole.
2. a kind of assembly tooling of cylinder interior compression spring as claimed in claim 1, it is characterised in that：The spring pressure head
（4）Constitute, and be provided with the inside of each Split type structure upper end recessed for 2 to 4 vertical Split type structures of size difference identical
Platform（16）.
3. a kind of assembly tooling of cylinder interior compression spring as claimed in claim 1, it is characterised in that：In the positioning seat
Stem（15）External diameter and cylinder body（1）The internal diameter of spline mouthful be adapted, the positioning seat（6）Race diameter and cylinder body（1）
Gabarit size be adapted, and positioning seat（6）Height and cylinder body（1）Bottom height be adapted.
4. a kind of assembly tooling of cylinder interior compression spring as claimed in claim 3, it is characterised in that：The positioning component
Including base（5）, the positioning seat（6）The base is fixed on by fastener（5）On.
5. a kind of assembly tooling of cylinder interior compression spring as claimed in claim 3, it is characterised in that：The positioning component
Including base（5）, the base（5）With positioning seat（6）It is integrally formed.
6. a kind of assembly tooling of cylinder interior compression spring as described in claim 1 to 5 is any, it is characterised in that：It is described
Pressuring head part also includes guide pin bushing（2）, the guide pin bushing（2）Close to spring pressure head（4）Inwall, guide pin bushing（2）Top be against spring
Pressure head（4）The concave station of upper end（16）On.
7. in a kind of cylinder body using a kind of assembly tooling of cylinder interior compression spring as described in claim 1 to 6 is any
The assembly method of portion's compression spring, its step mainly includes：
1）By three pieces of thimbles（8）Use flexible fastening ring（10）It is fixed on cylinder body（1）In the thimble groove of internal spline mouthful, then will
Rounded washers（9）It is put in cylinder body（1）It is interior, and it is pressed in three pieces of thimbles（8）Above, adjust rounded washers（9）With three pieces of thimbles
（8）Cooperation, then by compression spring（3）It is put in cylinder body（1）It is interior, make compression spring（3）Lower end and rounded washers（9）Connect
Touch, form preliminary combination；
2）Hand presses compression spring（3）, preliminary gang flipping now is put in positioning seat（6）On, make positioning seat newel（15）
It is inserted in cylinder body（1）Spline mouthful；
3）By spring pressure head（4）Each Split type structure pressure to be assembled is uniformly placed on centered on the central shaft of hollow cylinder
Contracting spring（3）Inner ring side on, adjacent spring pressure head（4）Space is left between Split type structure；
4）By the attachment screw（7）Through spring pressure head（4）Hollow cylinder, extrusion spring pressure head is to close to positioning component
Direction is moved, and is spun solid at positioning seat newel（15）Internal thread hole in；
5）Check thimble（8）And compression spring（3）After each in place, attachment screw is screwed with Simple spanner（7）, compression spring
（3）Cylinder body is pressed into therewith（1）In, wait to be threaded to and expose cylinder body（1）After interior circlip for hole groove, stop screwing, with card
Spring is clamped the circlip for hole（11）It is placed into groove；
6）Attachment screw is unscrewed with Simple spanner opposite direction（7）, by attachment screw（7）Remove；
7）Spring pressure head is rapped with screwdriver（4）, removed, further take out the flexible fastening ring of cylinder base（10）, you can reach
To in cylinder body（1）Interior installation compression spring（3）Purpose.
8. a kind of assembly method of cylinder interior compression spring as claimed in claim 7, it is characterised in that：The step 3）
In, by spring pressure head（4）After placing, then by guide pin bushing（2）Along spring pressure head（4）Inwall is put into, and its top is against spring pressure
Head（4）The concave station of upper end（16）On, attachment screw in the step 4（7）Through spring pressure head（4）And compression spring（3）'s
Simultaneously also through guide pin bushing（2）, in the step 6, removing attachment screw（7）Remove guide pin bushing therewith afterwards（2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610047551.2A CN105538235B (en) | 2016-01-25 | 2016-01-25 | A kind of assembly tooling of cylinder interior compression spring and its assembly method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610047551.2A CN105538235B (en) | 2016-01-25 | 2016-01-25 | A kind of assembly tooling of cylinder interior compression spring and its assembly method |
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| CN105538235A CN105538235A (en) | 2016-05-04 |
| CN105538235B true CN105538235B (en) | 2017-09-29 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108161838B (en) * | 2017-12-22 | 2021-06-29 | 赛克思液压科技股份有限公司 | Tool for press mounting of cylinder spring and clamp spring |
| CN109798279A (en) * | 2019-03-28 | 2019-05-24 | 西安石油大学 | A kind of dismantling device and method of cylinder interior compressed spring |
| CN110125663A (en) * | 2019-05-08 | 2019-08-16 | 河南瑞创通用机械制造有限公司 | A kind of cropper stepless change wheel spring assembly device and method |
| CN112643591B (en) * | 2021-01-12 | 2022-09-20 | 中国工程物理研究院总体工程研究所 | Assembling tool for micro acceleration sensor |
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| DE50111613D1 (en) * | 2000-05-25 | 2007-01-25 | Arx Ag | Pressing tool for the compression of coupling elements |
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| CN201235526Y (en) * | 2008-04-15 | 2009-05-13 | 哈尔滨飞机工业集团有限责任公司 | Circlip pressing in tool |
| CN104097055A (en) * | 2014-07-16 | 2014-10-15 | 无锡凯绎科技有限公司 | Pneumatic assembling tool for compression springs |
| CN204976531U (en) * | 2015-08-17 | 2016-01-20 | 济宁市金牛机械有限公司 | Compression spring assembly fixture |
| CN205342998U (en) * | 2016-01-25 | 2016-06-29 | 山东华伟液压科技有限公司 | Inside compression spring's of cylinder body assembly fixture |
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| CN105538235A (en) | 2016-05-04 |
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