CN203092095U - Piston rod press fitting mold - Google Patents
Piston rod press fitting mold Download PDFInfo
- Publication number
- CN203092095U CN203092095U CN2013200541484U CN201320054148U CN203092095U CN 203092095 U CN203092095 U CN 203092095U CN 2013200541484 U CN2013200541484 U CN 2013200541484U CN 201320054148 U CN201320054148 U CN 201320054148U CN 203092095 U CN203092095 U CN 203092095U
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- China
- Prior art keywords
- piston
- hole slot
- supporting member
- push rod
- piston rod
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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.)
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Abstract
The utility model discloses a piston rod press fitting mold which comprises a support and a supporting piece. The supporting piece comprises two side walls which are used for supporting an upper boss of a piston inner cavity and a connecting portion which is used for being connected with the same end portions of the two side walls. The cross section of the supporting piece is of a U shape, a supporting post is arranged on the support, the connecting portion of the supporting piece is installed on the supporting post, and a space which is used for containing a connecting rod small head is formed between the two side walls. The upper boss of the piston inner cavity is supported by the supporting piece when a piston pin is pressed in an upper pin hole of a piston, the whole piston inner cavity is prevented from being stressed by outside pressure, and therefore radial deformation can not occur in the process of press fitting of a piston rod assembly. Due to the fact that a supporting device which is driven by a pneumatic device is additionally arranged, the lower wall face of the piston is supported when the piston pin is inserted into a lower pin hole of the piston, furthermore, the fact that the radial deformation does not occur in the process of press fitting of the piston rod assembly is ensured.
Description
Technical field
The utility model relates to the engine piston technical field, is specifically related to a kind of piston rod press mounting die.
Background technology
Piston rod part is one of requisite critical elements in the engine, and as shown in Figure 1, piston rod part comprises piston 1, connecting rod 2 and piston pin 3, and the overall structure of piston 1 is similar to cylinder, and material is an aluminium alloy.Do reciprocating linear motion in that engine combustion is indoor during work.In order to reduce piston weight, and chamber 11 provides certain space for small end of connecting rod 21 within it, and piston 1 is designed to thin-wall barrel.
As shown in Figure 1, piston pin 3 is an interference fit with two pin-and- holes 12,13 up and down of piston 1, and piston pin 3 is a matched in clearance with the tie rod holes 22 of connecting rod 2, and tie rod holes 22 can be swung around piston pin.Piston pin 3 is pressed into the last pin-and-hole 12 of piston 1 earlier when press-fiting, and passes the tie rod holes 22 of connecting rod 2 again, is pressed into the following pin-and-hole 13 of piston 1 at last.When trial production, the overall process that press-fits all is to be bearing-surface with piston lower wall surface 14; When piston pin 3 is pressed on the piston pin-and-hole 12, because of there are big gap in the two sides up and down 211,212 of the small end of connecting rod 21 of connecting rod 2 and 111,112 end faces of two boss up and down of piston cavity 11, thin-wall barrel piston 1 produces radial deformation under the effect of pressure assembling force F and supporting force f.
Piston rod part after press-fiting is detected, find that piston 1 radial deformation is very big, the deviation from circular from maximum reaches 0.20mm, has a strong impact on the assembly quality of piston rod.It is not high to cause piston air-tightness to occur in later stage work, and service life is low, further has influence on the burning quality and the operating efficiency of engine.
The utility model content
The utility model provides a kind of piston rod press mounting die, can address the above problem.
The utility model provides a kind of piston rod press mounting die, comprise bearing and supporting member, supporting member comprises two sidewalls that are used for support piston inner chamber convex platform and the connecting portion that is used to be connected in two same ends of sidewall, and the cross section of this supporting member takes the shape of the letter U, one pillar is set on the described bearing, the connecting portion of described supporting member is installed on the pillar, is formed for the space of ccontaining small end of connecting rod between two sidewalls.
Preferably, the periphery of described supporting member is provided with the reinforcement that raises up.
Preferably, also be provided with a supporting arrangement that is used for the supporting piston lower wall surface on the described bearing.
Preferably, described supporting arrangement comprises a cylinder block, cylinder block has first hole slot of horizontal direction and second hole slot of vertical direction, first hole slot and second hole slot connect, being provided with one in first hole slot can be along the plunger of first hole slot slip, being provided with one in second hole slot can be along the movable push rod of second hole slot slip, plunger has first inclined-plane near an end of second hole slot, movable push rod has second inclined-plane that mates with first inclined-plane near an end of first hole slot, the axial line of movable push rod is through the center in two spaces that sidewall forms of supporting member, and plunger is by the pneumatic means driving that is tightly connected with first hole slot.
Preferably, described movable push rod is the hollow push rod, is provided with spring in the movable push rod, and a spheroid is fixed at the spring top, and the spheroid first half protrudes in the top of movable push rod.
Preferably, the sidewall of plunger and movable push rod is respectively equipped with gathering sill, and the inwall of first hole slot and second hole slot is respectively equipped with the guide finger that is complementary with gathering sill.
Preferably, the top of described pillar also is fixed with a positioning block, described locating piece is provided with one at vertical direction and is used for the through hole that piston pin is located, the axial line of described through hole is through the center in two spaces that sidewall forms of supporting member, and locating piece and supporting member are formed for the space of ccontaining piston cavity convex platform in vertical direction.
Preferably, described locating piece is fixed on the top of pillar by a cushion block, and the thickness of cushion block is greater than the thickness of piston cavity convex platform.
Technique scheme as can be seen, since the utility model embodiment adopt supporting member piston pin insert piston on during pin-and-hole the convex platform to piston cavity support, therefore avoided whole piston cavity to be subjected to ambient pressure, thereby guaranteed that piston rod part deformation can not take place in the process that press-fits.And also set up the supporting arrangement that drives by pneumatic means among the utility model embodiment, the lower wall surface to piston when piston pin inserts the following pin-and-hole of piston supports, and has guaranteed that further piston rod part deformation can not take place in the process that press-fits.
In addition, set up locating piece among the utility model embodiment, the acting as of this locating piece: 1, can make piston pin in press mounting die, obtain location fully fast; 2, piston pin makes piston obtain two point locations in mould to the effect of the last pin-and-hole of piston in the locating piece through hole by inserting, thereby has improved efficient that piston rod part press-fits and press-fited quality.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the part section structural representation of piston rod part;
Fig. 2 is the structural representation of press mounting die among the utility model embodiment 1;
Fig. 3 is that the K of supporting member among Fig. 2 is to structural representation;
Fig. 4 is the structural representation that supporting member supports the piston cavity convex platform when piston pin is pressed into hole on the piston among the utility model embodiment 1;
Fig. 5 is the side-looking structural representation of press mounting die among the utility model embodiment 2;
Fig. 6 is the main TV structure schematic diagram of press mounting die among the utility model embodiment 2;
Fig. 7 is the structural representation that supporting arrangement supports the piston lower wall surface when piston pin is pressed into hole under the piston among the utility model embodiment 2.
The specific embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiment that obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment 1:
The utility model embodiment provides a kind of piston rod press mounting die, as Fig. 2, Fig. 3 and shown in Figure 4, comprise bearing 4 and supporting member 5, supporting member 5 comprises two sidewalls 51 that are used for support piston inner chamber convex platform 111 and the connecting portion 53 that is used to be connected in two same ends of sidewall, and the cross section of this supporting member 5 takes the shape of the letter U, 4 are provided with a pillar 41 on the described bearing, and the connecting portion 53 of described supporting member 5 is installed on the pillar 41, are formed for the space of ccontaining small end of connecting rod 21 between two sidewalls 51.
Be understandable that, because piston cavity convex platform 111 is slightly greater than the sectional area of small end of connecting rod 21 at vertical direction at the sectional area of vertical direction, supporting member 5 can only support piston inner chamber convex platform 111 the edge, therefore, for two sidewalls 51 that make supporting member 5 can support piston cavity convex platform 111, width between two sidewalls 51 of supporting member should be slightly larger than the diameter of small end of connecting rod 21, promptly is formed for the space of ccontaining small end of connecting rod 21 between two sidewalls 51; Simultaneously, the width of whole supporting member should guarantee himself to be inserted in the piston cavity 11; The integral width that is appreciated that supporting member equally is less than the piston cavity A/F, can extend into 11 pairs of piston cavity convex platforms 111 of piston cavity with two sidewalls 51 that guarantee supporting member and support.
As seen from Figure 4, space between connecting rod 2 and the piston cavity convex platform 111 limited (general this space of piston only is 4mm), therefore the periphery of supporting member 5 is provided with the reinforcement 52 that raises up described in the utility model embodiment, reinforcement 52 can strengthen the bearing capacity of whole supporting member, the reinforcement that raises up simultaneously can ccontaining piston cavity convex platform 111 the part lateral wall, can play certain position-limiting action.
Also be provided with a supporting arrangement 6 that is used for support piston lower wall surface 14 described in the utility model embodiment on the bearing 4.This supporting arrangement can adopt existing supporting seat or support pads, realizes the height adjusting of supporting arrangement by the number that increases or reduce supporting base or supporting pad stack.
When press-fiting, earlier piston cavity convex platform 111 is placed on the supporting member 5, the last pin-and-hole 12 of piston is aimed at the space that supporting member 5 two sides form, then piston pin 3 is pressed into the last pin-and-hole 12 of piston, in this process, whole piston supports by supporting member 5, so piston cavity 11 can not oppressed, and can effectively avoid piston that radially deformation takes place.
When piston cavity convex platform 111 is placed on the supporting member, can adjust the height of supporting arrangement, thereby make supporting arrangement 6 can support to piston lower wall surface 14, when piston pin 3 is pressed under the piston pin-and-hole 13, by supporting arrangement 6 support piston lower wall surfaces 14, piston cavity 11 still can not oppressed, thereby further avoids piston that radially deformation takes place.
Embodiment 2:
As shown in Figure 5, on the press mounting die basis of engine piston bar press mounting die in the foregoing description 1 among the utility model embodiment supporting arrangement is made improvement, and the increase locating piece press-fits efficient with lifting.Concrete improvements see also following literal, can be for other structural principle introductions of press mounting die with reference to the description in the foregoing description 1, and present embodiment repeats no more.
Referring to Fig. 5 and shown in Figure 6, supporting arrangement among the utility model embodiment comprises a cylinder block 61, cylinder block 61 has first hole slot of horizontal direction and second hole slot of vertical direction, first hole slot and second hole slot connect, being provided with one in first hole slot can be along the plunger 62 of first hole slot slip, being provided with one in second hole slot can be along the movable push rod 63 of second hole slot slip, plunger 62 has first inclined-plane 621 near an end of second hole slot, movable push rod has second inclined-plane 631 that mates with first inclined-plane near an end of first hole slot, the axial line of movable push rod 63 is through the center in two sidewall 51 spaces that form of supporting member 5, and plunger 62 is by the pneumatic means (not shown) driving that is tightly connected with first hole slot.Be understandable that plunger 61 is divided into air chamber a and air chamber b with first hole slot in first hole slot, a air chamber is connected with pneumatic means by tracheae with the b air chamber; When pneumatic means is inflated in air chamber a, the pressure of air chamber a increases, thereby promotes plunger (to the direction near second hole slot) slip to the right, because first inclined-plane 621 and second inclined-plane 631 are complementary, movable push rod 63 moves upward at vertical direction, thereby can be used for the support piston lower wall surface.Pneumatic means among the utility model embodiment links to each other with pneumatic system in the pneumatic press machine.Certainly, pneumatic means can also select for use other can provide and control the device of gas turnover, does not repeat them here.When pneumatic means make air chamber b air inlet, when air chamber a gives vent to anger, the pressure in the air chamber a reduces, the pressure in the air chamber b is greater than the pressure in the air chamber a, then plunger 62 moves to right, movable push rod 63 resets under the gravity effect.
In order to prevent that rotating from appearring in plunger and movable push rod in motion process, the inwall that the sidewall of plunger 62 and movable push rod 63 is respectively equipped with gathering sill 622,632, the first hole slots and second hole slot is respectively equipped with the guide finger 623,633 that is complementary with gathering sill.
For the ease of the pre-determined bit of piston, movable push rod 63 is the hollow push rod described in the utility model embodiment, is provided with spring 64 in the movable push rod 63, and a spheroid 65 is fixed at spring 64 tops, and spheroid 65 first halves protrude in the top of movable push rod 63.Spheroid 65 can be slightly less than the thickness sum of piston cavity lower convex platform 112 and small end of connecting rod 21 to the distance of supporting member lower surface, when piston cavity convex platform 111 is placed on the supporting member, pin-and-hole 13 can be urged to the top of spheroid 65 under the piston, spheroid 65 is withstanding pin-and-hole 13 under the piston under the elastic reaction of spring 64, realize the Primary Location to piston.Spheroid 65 can adopt the spheroid of steel ball, iron ball or other hard materials.
For pin-and-hole on the piston 12 is carried out pre-determined bit, the utility model embodiment also is fixed with a positioning block 7 on the top of pillar 41, described locating piece 7 is provided with one at vertical direction and is used for the through hole 71 that piston pin 3 is located, the axial line of described through hole 71 is through the center in two sidewall 51 spaces that form of supporting member, and locating piece 7 and supporting member 5 are formed for the space 73 of ccontaining piston cavity convex platform 111 in vertical direction.For the formation in this space 73, locating piece 7 described in the utility model embodiment is fixed on the top of pillar 41 by a cushion block 72, and the thickness of cushion block 72 is greater than the thickness of piston cavity convex platform 111.
Introduce the process that press-fits of press mounting die among the utility model embodiment in conjunction with Fig. 7, press mounting die is installed on the pneumatic press machine in the production, and air chamber a is connected with pneumatic means.Before press-fiting beginning, the pneumatic bearing device of press mounting die is in original state, and movable push rod 63 is in extreme lower position.
The piston cavity of at first small end of connecting rod 21 being packed between two boss 111,112, inserts piston between the supporting member two side of press mounting die with small end of connecting rod up and down more simultaneously.Can be pressed in the following pin-and-hole 13 of piston 1 on the spheroid 65 with left hand and (go up pin-and-hole and all have the chamfering conical surface with following pin-and-hole) this moment; The right hand injects piston pin 3 in the through hole 71 of locating piece 7 then, and piston pin 3 lower ends (piston pin has the chamfering conical surface) is pressed on the last pin-and-hole 12 of piston (the chamfering conical surface is convenient to quick location), this moment, piston obtained the location fully with respect to piston pin 3 in press mounting die.
At this moment, control pneumatic means (right crus of diaphragm is stepped on the speed governing jettron of pneumatic press machine) is contained in the last pin-and-hole 12 that depression bar on the pneumatic press machine is pressed into piston pin 3 piston lentamente, and the lower flat of piston cavity convex platform 111 is pressed on two sidewalls 51 of supporting member; Immediately adjust small end of connecting rod 21 positions with the right hand, pin-and-hole 13 aligns to make tie rod holes 22 and last pin-and-hole 12 reach down, and piston pin 3 continues across tie rod holes 22.Be contained in the reversal valve commutation on the pneumatic press machine this moment, movable push rod 63 arrives the extreme higher position under plunger 62 promotes, and spheroid 65 is pushed back in the movable push rod, and piston lower wall surface 14 is withstood in movable push rod upper surface.Depression bar on the pneumatic press machine continues descending, and piston pin 3 is pressed under the piston in the pin-and-hole 13.For the structure and the operation principle of pneumatic press machine, those skilled in the art can know that this gives unnecessary details no longer one by one by prior art.
By technique scheme as can be seen, press-fit in the process whole, piston cavity is all oppressed, and has therefore thoroughly solved piston rod part and has press-fited the problem that occurs distortion in the process, press-fits efficient but also further promoted.
More than piston rod press mounting die that the utility model embodiment is provided be described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (8)
1. piston rod press mounting die, it is characterized in that, comprise bearing and supporting member, supporting member comprises two sidewalls that are used for support piston inner chamber convex platform and the connecting portion that is used to be connected in two same ends of sidewall, and the cross section of this supporting member takes the shape of the letter U, one pillar is set on the described bearing, and the connecting portion of described supporting member is installed on the pillar, is formed for the space of ccontaining small end of connecting rod between two sidewalls.
2. piston rod press mounting die as claimed in claim 1 is characterized in that: the periphery of described supporting member is provided with the reinforcement that raises up.
3. piston rod press mounting die as claimed in claim 1 is characterized in that: also be provided with a supporting arrangement that is used for the supporting piston lower wall surface on the described bearing.
4. piston rod press mounting die as claimed in claim 3, it is characterized in that: described supporting arrangement comprises a cylinder block, cylinder block has first hole slot of horizontal direction and second hole slot of vertical direction, first hole slot and second hole slot connect, being provided with one in first hole slot can be along the plunger of first hole slot slip, being provided with one in second hole slot can be along the movable push rod of second hole slot slip, plunger has first inclined-plane near an end of second hole slot, movable push rod has second inclined-plane that mates with first inclined-plane near an end of first hole slot, the axial line of movable push rod is through the center in two spaces that sidewall forms of supporting member, and plunger is by the pneumatic means driving that is tightly connected with first hole slot.
5. piston rod press mounting die as claimed in claim 4 is characterized in that: described movable push rod is the hollow push rod, is provided with spring in the movable push rod, and a spheroid is fixed at the spring top, and the spheroid first half protrudes in the top of movable push rod.
6. as claim 4 or 5 described piston rod press mounting dies, it is characterized in that: the sidewall of plunger and movable push rod is respectively equipped with gathering sill, and the inwall of first hole slot and second hole slot is respectively equipped with the guide finger that is complementary with gathering sill.
7. as any described piston rod press mounting die in the claim 1 to 5, it is characterized in that: the top of described pillar also is fixed with a positioning block, described locating piece is provided with one at vertical direction and is used for the through hole that piston pin is located, the axial line of described through hole is through the center in two spaces that sidewall forms of supporting member, and locating piece and supporting member are formed for the space of ccontaining piston cavity convex platform in vertical direction.
8. piston rod press mounting die as claimed in claim 7 is characterized in that: described locating piece is fixed on the top of pillar by a cushion block, and the thickness of cushion block is greater than the thickness of piston cavity convex platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200541484U CN203092095U (en) | 2013-01-30 | 2013-01-30 | Piston rod press fitting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200541484U CN203092095U (en) | 2013-01-30 | 2013-01-30 | Piston rod press fitting mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203092095U true CN203092095U (en) | 2013-07-31 |
Family
ID=48843538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200541484U Expired - Fee Related CN203092095U (en) | 2013-01-30 | 2013-01-30 | Piston rod press fitting mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203092095U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105414867A (en) * | 2015-12-30 | 2016-03-23 | 江苏科凌医疗器械有限公司 | Rotary welding table |
| CN107243736A (en) * | 2017-08-04 | 2017-10-13 | 承德苏垦银河连杆有限公司 | A kind of connecting rod shop bolt being oriented to based on wedge slide block press-fits special fixture |
| CN109128761A (en) * | 2018-09-25 | 2019-01-04 | 苏州富强科技有限公司 | The mounting structure of pressing device and forearm casting wheel assembly synchronous with retarder |
-
2013
- 2013-01-30 CN CN2013200541484U patent/CN203092095U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105414867A (en) * | 2015-12-30 | 2016-03-23 | 江苏科凌医疗器械有限公司 | Rotary welding table |
| CN107243736A (en) * | 2017-08-04 | 2017-10-13 | 承德苏垦银河连杆有限公司 | A kind of connecting rod shop bolt being oriented to based on wedge slide block press-fits special fixture |
| CN109128761A (en) * | 2018-09-25 | 2019-01-04 | 苏州富强科技有限公司 | The mounting structure of pressing device and forearm casting wheel assembly synchronous with retarder |
| CN109128761B (en) * | 2018-09-25 | 2023-11-24 | 苏州富强科技有限公司 | Mounting structure of hold-down device and forearm foundry goods and reduction gear synchronizing wheel subassembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20210130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |