CN203783666U - Columnar type hydraulic tappet - Google Patents
Columnar type hydraulic tappet Download PDFInfo
- Publication number
- CN203783666U CN203783666U CN201420135034.7U CN201420135034U CN203783666U CN 203783666 U CN203783666 U CN 203783666U CN 201420135034 U CN201420135034 U CN 201420135034U CN 203783666 U CN203783666 U CN 203783666U
- Authority
- CN
- China
- Prior art keywords
- plunger
- housing
- indent
- hydraulic tappet
- annular groove
- Prior art date
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a columnar type hydraulic tappet. The columnar type hydraulic tappet comprises a housing, wherein a plunger piston is correspondingly mounted in the housing, a high-pressure cavity used for hydraulic medium extends between the lower end surface of the plunger piston and the lower side of the housing, and the high-pressure cavity can be closed through a check valve which can be opened towards the high-pressure cavity; an outer ring groove used for the circulation of the hydraulic medium is formed in the external diameter of the housing, an inner ring groove used for the circulation of the hydraulic medium is formed in the inner side of the housing in the radial direction, and a housing oil hole or a plurality of housing oil holes is/are formed between the inner ring groove and the outer ring groove; the plunger piston is composed of a closed hemispherical head part, a rod part and a main body part; the plunger piston is characterized in that a neck part concave inwards is arranged between the head part and the rod part of the plunger piston, and the wall thickness of the neck part is 105%-120% of the wall thickness of the other parts of the plunger piston. The columnar type hydraulic tappet is simple in structure and firm; meanwhile, the design of increasing the wall thickness of the single thin-walled cavity plunger piston in low-intensity areas is adopted, so that the requirements of increasing the oil reserve of the inner cavity of the plunger piston and improving the fatigue strength are met.
Description
Technical field
The utility model relates to a kind of column formula hydraulic tappet.
Background technique
Hydraulic tappet has the function of auto-compensation valve clearance, has reduced impact and the noise of distribution device, has reduced the wearing and tearing of each working surface of distribution device, has improved the features such as the discharge of motor and combustion efficiency.
Existing hydraulic tappet structure is the disclosed structure that has several patterns at present:
As shown in Figure 1, Chinese patent literature CN201593451U discloses a kind of hydraulic pressure support element, this kind of structure plunger is machining moulding after cold-heading, and processing technology is complicated, wastes time and energy, the material of plunger neck is cut after processing, cut off material metal streamline, other position of the wall ratio of neck is thin, two cross-sectional dimension sudden changes, cause stress to concentrate, larger on the impact of plunger bulk strength.
As shown in Figure 2, Chinese patent literature CN201228569Y discloses in a kind of hydraulic pressure support element, this kind of structure plunger outer diameter a narrow V-type annular groove, and oilhole is opened above V-type annular groove.The defect of the structure of this kind of V-type annular groove is that jump ring can only slide up and down together along with plunger when the spacing jump ring of fit on, may cause the fracture of jump ring wear surface.On the external cylindrical surface of oil-hole location on V-type groove, while circulating by this aperture in hydraulic medium, the impurity of hydraulic medium the inside just may enter into the matching gap the inside of housing and plunger, causes hydraulic tappet stuck, loses automatic regulation function.
As shown in Figure 3, the disclosed hydraulic pressure support element of Chinese patent literature CN102767405, this kind of structure plunger is comprised of two parts, so difficulty of processing reduces when processing single part separately; But because need to process respectively these two parts, cost of production is high, particularly the beating degree of two product contact end faces requires very high, when if beating degree is overproof, can produce lateral force, and then may cause plunger clamping stagnation in housing, affect the use function of product.
Chinese patent literature CN102788154 discloses a kind of Integral hydraulic tappet plunger and whole method for rolling and molding thereof, and bulb, bar portion and main part are one-body molded, and three's wall thickness all equates.This scheme has solved the technological deficiency of split type plunger and the existence of traditional machining plunger.
But claimant is through probing into discovery, the stressed not each several part uniform stressed of plunger, particularly head and neck are stressed key areas, it is the hidden danger place that produces stress fatigue, and although integral forming process such as wall thickness such as grade has increased the bulk strength of plunger, the technical problem that unresolved stress is concentrated.
Summary of the invention
The purpose of this utility model is to provide a kind of hydraulic tappet with integral type plunger, simple in structure firm, wherein, the wall thickness in the strength weak region of monomer thin wall cavity plunger increases design, has taken into account the demand that increases plunger cavity oil reserve and improve fatigue strength.
Concrete technological scheme of the present utility model is:
Column formula hydraulic tappet, there is a housing, in housing, correspondence is provided with a plunger, between the lower end surface of plunger and housing downside, extend a hyperbaric chamber for hydraulic medium, this hyperbaric chamber can seal by a safety check of opening towards this hyperbaric chamber, on housing external diameter, be provided with an outer groove for hydraulic medium circulation, radially inner side at housing is provided with an inner groove for hydraulic medium circulation, between inner groove and outer groove, be provided with one or more housing oilholes, described plunger is by the hemispherical nose sealing, bar portion and main part form, it is characterized in that being provided with between the head of described plunger and bar portion the neck of an indent, the wall thickness of this neck is 105% ~ 120% of plunger remaining part wall thickness.
The plunger that this programme provides, by the wall thickness of the neck of increase, has avoided neck thickness to cross the bad technical problem of the raw fatigue strength of small property; The wall thickness that the utility model provides thickens the fatigue strength that scheme can increase hydraulic tappet, and enough safety coefficient are provided, and blocked up wall thickness is manufacturing difficulty, and product weight increases obviously, runs counter to the lightweight requirements of product.
The described scheme that thickens adopts roll forming again after cold-heading, by mould make plunger axially when the roll forming in pressured state, because mould has limited metallic material axial flow, thereby make the material only can Radial Flow, reach the object that increases neck thickness after roll extrusion.
Optimally, the head wall thickness of described plunger is 105% ~ 120% of plunger remaining part wall thickness, and the plunger that this programme provides, by the wall thickness of the ball head of increase, has avoided ball head thickness to cross the bad technical problem of the raw fatigue strength of small property; The wall thickness that the utility model provides thickens the fatigue strength that scheme can increase hydraulic tappet, and enough safety coefficient are provided, and blocked up wall thickness is manufacturing difficulty, and product weight increases obviously, runs counter to the lightweight requirements of product.
The described scheme that thickens adopts roll forming again after cold-heading.During cold-heading, by bulb position preshrunk mouth, limit the axial flow of metallic material, reach the object that thickens head
Optimally, described plunger is roll forming again after cold-heading, plunger outer diameter is provided with a wide annular groove of the indent corresponding with housing inner groove, in the wide annular groove of indent, there are one or more oilholes, by oilhole hydraulic medium, flow in the shoe cream room of plunger, the groove bottom width of the wide annular groove of this indent is not less than plunger oilhole diameter, and the hole heart of all oilholes all should be more than the center line of the wide annular groove of indent.
Chinese patent literature CN201228569Y is disclosed:
1, in plunger, having the defect of tumbler is can not process at one time when plunger machine shaping, needs multiple working procedure to complete, and wastes time and energy.Between plunger and plunger cavity body, have tiny gap, the impurity producing when heat treatment and following process is not easy to clear.
2, the defect of V-type groove structure is that jump ring can only slide up and down together along with plunger when the spacing jump ring of fit on, and surface friction drag is large, and may cause the fracture of jump ring wear surface; If the oilhole of this kind of structure adopts the mode of punching to add man-hour, the external diameter of plunger may produce distortion because of stamping-out, be unfavorable for grinding below, so can only adopt the method for milling, boring or laser or electric machining, causes processing speed slow, and manufacture cost is high.
And that the wide annular groove of indent of the present utility model has is simple in structure, easy processing structural feature, oilhole branch, in the wide annular groove of indent, is applicable to piercing, and jump ring can not slide because of upper and lower pressure of plunger, efficiently solves the shortcoming of above-mentioned prior art existence.
The plunger of cold upsetting extrusion is compared with existing structure plunger, has overcome the plunger of existing structure due to cutting, cuts off steel fiber and the low technical problem of fatigue strength brought.
Optimally, the minimum place of described plunger neck diameter is less than bulb diameter 0.5 ~ 1.0mm.When recess diameter is less than bulb diameter when too many, increased the moulding difficulty of neck, reduced the working life of grinding tool, when recess diameter is less than bulb diameter very little time, bulb easily comes off from bulb locking plate.
Optimally, the bottom land width dimensions of the wide annular groove of described indent is 1.5 ~ 3.0mm, and groove depth is 0.2 ~ 1.0mm.This structure plunger oilhole can be complete be distributed in the wide annular groove of indent, when adopting stamping-out, described oilhole adds man-hour, the upper excessive inclined-plane of border, hole and the wide annular groove of indent is tangent, when adopting electric machining, described oilhole can be distributed on the excessive inclined-plane of the wide annular groove of indent, object is to make oilhole as far as possible on the upper side, makes shoe cream room can have larger volume, stores more hydraulic medium.The technical problem of having avoided machining of oil hole to be slidably matched on external diameter at plunger.
The size setting of the wide annular groove of the utility model indent has flow section requirement easy machine shaping, that meet hydraulic medium; Cross the dark wide wide annular groove processing difficulties of indent.
Optimally, the sealing seat of described plunger contains one to the locating face of shoe cream room sunken inside, is conducive to the location of steel ball.When this locating face is arc surface, r is 0.3 ~ 0.8mm; When this locating face is the conical surface, the cone angle beta of conical surface part is 60 degree ~ 120 degree.When this locating face can also be parabola face or other there is the transitional surface of enclosed construction, if circular arc is with the combination of taper.
Accompanying drawing explanation
Fig. 1 is the hydraulic tappet structure schematic diagram of prior art one.
Fig. 2 is the hydraulic tappet structure schematic diagram of prior art two.
Fig. 3 is the hydraulic tappet structure schematic diagram of prior art three.
Fig. 4 is the utility model hydraulic tappet specific embodiment one structural representation.
Fig. 5 is the utility model specific embodiment two structural representations.
Fig. 6 is the utility model specific embodiment three structural representations.
Fig. 7 is the utility model specific embodiment four structural representations.
Fig. 8 is the utility model specific embodiment four structural representations.
Fig. 9 is that the utility model is specifically implemented oilhole stamping-out operative position schematic diagram.
Figure 10 is that the utility model is specifically implemented oilhole electric machining position view.
Figure number explanation:
1, plunger
2, housing
3, one-way valve
4, neck
5, the wide annular groove of plunger indent
6, plunger oilhole
7, housing oilhole
8, housing inner groove
9, shoe cream room
10, hyperbaric chamber
11, head
12, plunger annular groove lower inclined plane
13, housing outer groove
14, returning spring
15, locating face.
Embodiment
Below in conjunction with accompanying drawing, the utility model is conducted further description.
Embodiment one
As shown in Figure 4, a kind of hydraulic tappet for internal combustion valve mechanism, this hydraulic tappet has the housing (2) of a tubular, is equipped with a plunger (1) in axial sliding in the inside of this housing.In the bottom surfaces of plunger (1) and the downside of housing (2), have a hyperbaric chamber for hydraulic medium (10), this hyperbaric chamber can seal by being positioned at the one-way valve (3) of plunger (1) lower end.On housing (2) external diameter, be useful on the outer groove (13) of hydraulic medium circulation, at the radially inner side of housing, have an inner groove (8) for hydraulic medium circulation, between two annular grooves, be useful on one or more oilholes (7) of connection.
The external diameter of plunger is to have a wide annular groove of indent (5), on the wide annular groove of indent (5), there are one or more oilholes (6), the inner groove of housing (8) communicates with the wide annular groove of indent (5) of plunger, then the oilhole (6) that passes through plunger is passed to hydraulic medium in shoe cream room (9).
This programme, the head of plunger (11), bar portion and main part are one-body molded, are provided with a neck (4) that is indent between the head of plunger (11) and bar portion, and the effect of neck (4) is convenient to install locking plate, by locking plate, be reliably connected with roller rock arm, prevent from coming off.
The wide annular groove of indent (5) has one for limiting the move up and down lower inclined plane of free height of hydraulic tappet.
The head of plunger (11), neck and the wide annular groove of indent (5) wall thickness are 105% ~ 120% of plunger remaining part wall thickness.
Plunger neck (4) diameter is less than bulb diameter 0.5 ~ 1.0mm;
The bottom land width dimensions of the wide annular groove of indent (5) is 1.5 ~ 3.0mm, and groove depth is 0.2 ~ 1.0mm.
Embodiment two
Different from embodiment one, as shown in Figure 5, between the head of plunger (11) and bar portion, be provided with a level and smooth neck (4B).
Embodiment three
Different from embodiment one, as shown in Figure 6, the locating face of plunger (15) combines with arc surface for the conical surface, and the radius r of circular arc portion is 0.3 ~ 0.8mm, and the cone angle of conical surface part is 5 degree ~ 15 degree.
Embodiment four
Different from embodiment one, as shown in Figure 7, the locating face of plunger (15) is arc surface, and the radius r of circular arc portion is 0.3 ~ 0.8mm.
Embodiment five
Different from embodiment one, as shown in Figure 8, the locating face of plunger (15) is the conical surface, and the cone angle beta of conical surface part is 60 degree ~ 120 degree.
Claims (8)
1. column formula hydraulic tappet, there is a housing, in housing, correspondence is provided with a plunger, between the sealing seat of plunger and housing downside, extend a hyperbaric chamber for hydraulic medium, this hyperbaric chamber can seal by a safety check of opening towards this hyperbaric chamber, on housing external diameter, be provided with an outer groove for hydraulic medium circulation, radially inner side at housing is provided with an inner groove for hydraulic medium circulation, between inner groove and outer groove, be provided with one or more housing oilholes, described plunger is by the hemispherical nose sealing, bar portion and main part form, it is characterized in that being provided with between the head of described plunger and bar portion the neck of an indent, the wall thickness of this neck is 105% ~ 120% of plunger remaining part wall thickness.
2. column formula hydraulic tappet according to claim 1, the wall thickness that it is characterized in that the head of described plunger is 105% ~ 120% of plunger remaining part wall thickness.
3. column formula hydraulic tappet according to claim 1 and 2, it is characterized in that described plunger outer diameter is provided with a wide annular groove of the indent corresponding with housing inner groove, in the wide annular groove of indent, there are one or more oilholes, by oilhole hydraulic medium, flow in the shoe cream room of plunger, the groove bottom width of the wide annular groove of this indent is not less than plunger oilhole diameter, and the Kong Xinjun of all oilholes is more than the center line of the wide annular groove of indent.
4. column formula hydraulic tappet according to claim 1 and 2, is characterized in that the minimum place of described plunger neck diameter is less than bulb diameter 0.5 ~ 1.0mm.
5. column formula hydraulic tappet according to claim 3, the bottom land width dimensions that it is characterized in that the wide annular groove of described indent is 1.5 ~ 3.0mm, groove depth is 0.2 ~ 1.0mm.
6. column formula hydraulic tappet according to claim 3, is characterized in that described oilhole adopts stamping-out processing or electric machining: when described oilhole adopts stamping-out, add man-hour, the upper excessive inclined-plane of oilhole border and the wide annular groove of indent is tangent; When described oilhole adopts electric machining, oilhole is distributed on the excessive inclined-plane of the wide annular groove of indent.
7. column formula hydraulic tappet according to claim 3, is characterized in that the wide annular groove of described indent has one for limiting the move up and down lower inclined plane of free height of hydraulic tappet.
8. column formula hydraulic tappet according to claim 1, is characterized in that the sealing seat of described plunger contains one to the locating face of shoe cream room sunken inside, and when described locating face is arc surface, r is 0.3 ~ 0.8mm; When described locating face is the combination of the conical surface and arc surface, the radius r of circular arc portion is 0.3 ~ 0.8mm, and the cone angle of conical surface part is 5 degree ~ 15 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420135034.7U CN203783666U (en) | 2014-03-24 | 2014-03-24 | Columnar type hydraulic tappet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420135034.7U CN203783666U (en) | 2014-03-24 | 2014-03-24 | Columnar type hydraulic tappet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203783666U true CN203783666U (en) | 2014-08-20 |
Family
ID=51319865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420135034.7U Withdrawn - After Issue CN203783666U (en) | 2014-03-24 | 2014-03-24 | Columnar type hydraulic tappet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203783666U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939162A (en) * | 2014-03-24 | 2014-07-23 | 杭州新坐标科技股份有限公司 | Columnar hydraulic tappet |
| WO2016091224A1 (en) * | 2014-12-11 | 2016-06-16 | 杭州新坐标科技股份有限公司 | Columnar-type hydraulic tappet |
| WO2016090757A1 (en) * | 2014-12-11 | 2016-06-16 | 杭州新坐标科技股份有限公司 | Column type hydraulic tappet |
-
2014
- 2014-03-24 CN CN201420135034.7U patent/CN203783666U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939162A (en) * | 2014-03-24 | 2014-07-23 | 杭州新坐标科技股份有限公司 | Columnar hydraulic tappet |
| WO2015143764A1 (en) * | 2014-03-24 | 2015-10-01 | 杭州新坐标科技股份有限公司 | Columnar hydraulic tappet |
| CN103939162B (en) * | 2014-03-24 | 2018-01-02 | 杭州新坐标科技股份有限公司 | Column formula hydraulic tappet |
| US10215201B2 (en) | 2014-03-24 | 2019-02-26 | Hangzhou Xzb Tech Co., Ltd. | Column type hydraulic tappet |
| WO2016091224A1 (en) * | 2014-12-11 | 2016-06-16 | 杭州新坐标科技股份有限公司 | Columnar-type hydraulic tappet |
| WO2016090757A1 (en) * | 2014-12-11 | 2016-06-16 | 杭州新坐标科技股份有限公司 | Column type hydraulic tappet |
| US9869212B2 (en) | 2014-12-11 | 2018-01-16 | Hangzhou Xzb Tech Co., Ltd. | Columnar hydraulic tappet |
| US10208634B2 (en) | 2014-12-11 | 2019-02-19 | Hangzhou Xzb Tech Co., Ltd | Columnar hydraulic tappet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20180102 |