CN203161809U - Composite pin shaft and concrete pump truck - Google Patents
Composite pin shaft and concrete pump truck Download PDFInfo
- Publication number
- CN203161809U CN203161809U CN 201320050397 CN201320050397U CN203161809U CN 203161809 U CN203161809 U CN 203161809U CN 201320050397 CN201320050397 CN 201320050397 CN 201320050397 U CN201320050397 U CN 201320050397U CN 203161809 U CN203161809 U CN 203161809U
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- China
- Prior art keywords
- solid shaft
- sleeve
- bearing pin
- compound bearing
- utility
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Abstract
The utility model discloses a composite pin shaft and a concrete pump truck. The composite pin shaft comprises a solid shaft and a sleeve which is arranged outside the solid shaft, wherein the solid shaft is in interference fit with the sleeve, and is made of a high-strength light material; and the sleeve is made of alloy structural steel. According to the composite pin shaft and the concrete pump truck, the composite pin shaft is in a structure with the solid shaft inside and the sleeve outside, the solid shaft is made of the high-strength light material, the external sleeve can easily overcome the defects of low hardness and low abrasion resistance of a light material, and thus the abrasion resistance of the pin shaft is ensured; and through the interference fit, the solid shaft and the sleeve can be tightly combined. The composite pin shaft is simple in structure and convenient to process and assemble, and can be applied to the concrete pump truck and other engineering machinery; and the weight of the pin shaft can be effectively reduced.
Description
Technical field
The utility model relates to technical field of engineering machinery, relates in particular to a kind of compound bearing pin and concrete mixer.
Background technique
Concrete mixer is a kind of engineering machinery that commerical ready-mixed concrete is transported to specified position.Bearing pin is the fastening piece that a class plays anastomosis, can constitute the stationary connection and also can do relative motion with coupling, is mainly used in the connection place of two parts, constitutes hinge-coupled, plays the effect of connection and transmitted load.
At present, between the concrete mixer boom joint arm and the connecting all by the hinged realization of bearing pin of joint arm and hydraulic jack.Concrete mixer produces alternate load in the pumping process, the jib bearing pin is under the effect of alternating stress, be subjected to strong impact, shearing, flecition, in the jib rotary course, also afford simultaneously frictional force, therefore require bearing pin to have higher yield strength, comprehensive mechanical properties such as higher shock resistance, anti-shearing, wear resistance are arranged simultaneously.
Bearing pin commonly used is generally the solid cylinder body structure, adopts 40Cr, 42CrMo, Alloy Constructional Steel manufacturings such as 35CrMo, 40CrNiMo to form, though the intensity height, plasticity is good, and density is big, Heavy Weight.In the prior art, strengthen the comprehensive mechanical property of bearing pin by adopting special heat treatment mode, carry out high-frequency induction hardening as the part outer surface layer to bearing pin and be processed to form intensity and the wear resistance that the high frequency hardening layer improves bearing pin; Improve tempering temperature and strengthen fatigue life etc.
The weight of bearing pin accounts for about jib gross weight 5-6%, if can alleviate the weight of bearing pin, can effectively reduce the jib gross weight, not only can alleviate the load to the chassis, also can improve the stability of jib and car load.
In order to alleviate bearing pin weight, consider to replace steel with the high-strength light material.But the hardness of lightweight material and wear resistance are generally all undesirable.Therefore, need a kind of novel bearing pin.
Summary of the invention
In view of this, a technical problem to be solved in the utility model provides a kind of compound bearing pin, and adopting inside is that solid shaft and outside are the structure of sleeve.
A kind of compound bearing pin comprises: solid shaft and the sleeve that is arranged on described solid shaft outside; Described solid shaft and described sleeve are interference fit.The material of described solid shaft is the high-strength light material; The material of described sleeve is Alloy Constructional Steel.
According to an embodiment of compound bearing pin of the present utility model, further, described solid shaft is identical with the length of described sleeve, and two end faces of described solid shaft are concordant respectively with two end faces of described sleeve.
According to an embodiment of compound bearing pin of the present utility model, further, the two ends of described sleeve all arrange chamfering.
According to an embodiment of compound bearing pin of the present utility model, further, on first end face of described solid shaft threaded central aperture is set, and in the cylndrical surface of described solid shaft the oilhole that connects with described threaded central aperture is set; Cylndrical surface at described sleeve arranges the through hole coaxial with described oilhole; Wherein, the degree of depth of described threaded central aperture is less than the length of described solid shaft.
According to an embodiment of compound bearing pin of the present utility model, further, at first end face setting of described solid shaft and the coaxial step hole of described threaded central aperture; Wherein, the diameter of described step hole is greater than the diameter of described threaded central aperture.
An embodiment according to compound bearing pin of the present utility model, further, at first end face of described solid shaft a groove is set, described groove connects the sidewall of described step hole and described sleeve, and the degree of depth of described groove is less than the degree of depth of described step hole.
According to an embodiment of compound bearing pin of the present utility model, further, the material of described solid shaft comprises: aluminum alloy, carbon fibre material; The material of described sleeve comprises: 40Cr, 42CrMo.
A kind of concrete mixer, the boom of described concrete mixer save between the arm and boom saves arm and hydraulic jack is hinged by aforesaid compound bearing pin.
Compound bearing pin of the present utility model and concrete mixer, it is that solid shaft and outside are the structure of sleeve that compound bearing pin adopts inside, the solid shaft material adopts the high-strength light material, outside sleeve can overcome the shortcoming that lightweight material hardness is lower, wear resistance is not enough, guarantee the wear resistance of bearing pin, adopt interference fit to guarantee that both combine closely, simple in structure, easy to process, and be convenient to assemble, can effectively alleviate the weight of bearing pin, not only can be applicable to concrete mixer, also can be applicable to Other Engineering machinery.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below only is embodiments 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.
Figure 1A-1C is the schematic representation according to an embodiment of compound bearing pin of the present utility model.
Wherein, Figure 1A is plan view, and Figure 1B is left view, and Fig. 1 C is stereogram.
Embodiment
With reference to the accompanying drawings the utility model is described more fully, exemplary embodiment of the present utility model wherein is described.Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who obtains under the creative work prerequisite, all belong to the scope of the utility model protection.Below in conjunction with figure and embodiment the technical solution of the utility model is carried out many-sided description.
Figure 1A-1C is the schematic representation according to an embodiment of compound bearing pin of the present utility model.As shown in the figure: compound bearing pin comprises: solid shaft 1 and the sleeve 2 that is arranged on solid shaft 1 outside; Solid shaft 1 is interference fit with sleeve 2.
According to an embodiment of the present utility model, solid shaft 1 is identical with the length of sleeve 2, and two end faces of solid shaft 1 are concordant respectively with two end faces of sleeve 2.
According to an embodiment of the present utility model, the two ends of sleeve 2 all arrange chamfering.
According to an embodiment of the present utility model, on first end face of solid shaft threaded central aperture 3 is set, and in the cylndrical surface of solid shaft 1 oilhole 4 that connects with threaded central aperture 3 is set; The through hole 5 coaxial with oilhole 4 is set in the cylndrical surface of sleeve 2; Wherein, the degree of depth of threaded central aperture 3 is less than the length of solid shaft 1.
According to an embodiment of the present utility model, at first end face of solid shaft 1 step hole 6 coaxial with threaded central aperture 3 is set; Wherein, the diameter of step hole 6 is greater than the diameter of threaded central aperture 3.
According to an embodiment of the present utility model, at first end face of solid shaft 1 groove is set, groove connects the sidewall of step hole 6 and sleeve 2, and the degree of depth of groove is less than the degree of depth of step hole 6.
According to an embodiment of the present utility model, at second end face of solid shaft 1 breach is set, breach connects the sidewall of sleeve 2, and on the plane of breach tapped hole 7 is set.
According to an embodiment of the present utility model, the material of solid shaft is the high-strength light material; The material of sleeve is Alloy Constructional Steel, for example, and Alloy Constructional Steels such as 40Cr, 42CrM, 35CrMo, 40CrNiMo, 40CrMnMo, 30CrMnTi, 30CrNiMo8+QT.
High-strength light material of the present utility model refers to the intensity height, and lightweight material generally refers to specific strength (ratio of Tensile strength and its density, MPa/(kg/m
3) material greater than 0.15, the specific strength of common high-strength steel only is 0.13MPa/(kg/m
3).Aluminum alloy for example, its specific strength can reach 0.192MPa/(kg/m
3); Carbon fibre material, its specific strength is up to 1.03MPa/(kg/m
3), all can be used for the manufacturing of solid shaft.
Alloy Constructional Steel obviously improves its performance for the basis at non-Alloy Constructional Steel adds an amount of a kind of or several alloys element, mainly for the manufacture of the structural steel of the bigger mechanical parts of various high-performance engineering members or sectional dimension, namely as mechanical parts and various engineering component and contain a kind of steel of or several a certain amount of alloying elements.
Compound bearing pin of the present utility model, inner solid shaft material is the high-strength light material.Its structure is identical with the structure of common bearing pin; Sleeve, namely the material of outside thin walled cylinder is common bearing pin common used materials such as 42CrMo or 40Cr, for the ease of installing, the sleeve ends chamfering, and open oilhole in the position corresponding with solid shaft; Corresponding with the solid shaft structure, an end of sleeve is reserved the breach of axle bumper plate, and the other end has groove.
Sleeve, namely the length of outside thin walled cylinder is identical with the length of inner solid shaft, and barrel bore is slightly less than the external diameter of axle.Before the assembling, it is expanded cylinder heating, after the magnitude of interference between cylinder and the solid shaft disappears, both is assembled together, treat the thin walled cylinder cooling after, solid shaft and cylinder will be closely linked.According to conditions of manufacture, also can both be assembled together by the method for the inner solid shaft that freezes.
According to an embodiment of the present utility model, engineering machinery, for example concrete mixer can practical compound bearing pin of the present utility model.The boom of concrete mixer saves between the arm and boom saves arm and hydraulic jack is hinged by compound bearing pin as above.
The utility model provides a kind of novel light weight compound bearing pin, and the solid shaft material adopts the high-strength light material, and is in light weight; Outside thin walled cylinder can overcome the shortcoming that lightweight material hardness is lower, wear resistance is not enough, guarantees the wear resistance of bearing pin.Adopt interference fit to guarantee that both combine closely.Adopt the assembling of temperature difference principle, simple possible can guarantee that junction plane is not impaired, efficient height, safety non-pollution.
Composite pins axle construction of the present utility model is simple, easy to process, and is convenient to assembling, can effectively alleviate the weight of pump truck, meets concrete mixer lightweight development trend.The utility model not only can be applicable to pump truck, also can be applicable to Other Engineering machinery.
Description of the present utility model provides for example with for the purpose of describing, and is not exhaustively or with the utility model to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present utility model and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiments that have various modifications that the utility model design is suitable for special-purpose.
Claims (8)
1. a compound bearing pin is characterized in that, comprising:
Solid shaft and the sleeve that is arranged on described solid shaft outside;
Described solid shaft and described sleeve are interference fit;
Wherein, the material of described solid shaft is the high-strength light material; The material of described sleeve is Alloy Constructional Steel.
2. compound bearing pin as claimed in claim 1 is characterized in that:
Described solid shaft is identical with the length of described sleeve, and two end faces of described solid shaft are concordant respectively with two end faces of described sleeve.
3. compound bearing pin as claimed in claim 2 is characterized in that:
The two ends of described sleeve all arrange chamfering.
4. compound bearing pin as claimed in claim 3 is characterized in that:
On first end face of described solid shaft threaded central aperture is set, and in the cylndrical surface of described solid shaft the oilhole that connects with described threaded central aperture is set;
Cylndrical surface at described sleeve arranges the through hole coaxial with described oilhole;
Wherein, the degree of depth of described threaded central aperture is less than the length of described solid shaft.
5. compound bearing pin as claimed in claim 4 is characterized in that:
At first end face setting of described solid shaft and the coaxial step hole of described threaded central aperture;
Wherein, the diameter of described step hole is greater than the diameter of described threaded central aperture.
6. compound bearing pin as claimed in claim 5 is characterized in that:
First end face at described solid shaft arranges a groove, and described groove connects the sidewall of described step hole and described sleeve, and the degree of depth of described groove is less than the degree of depth of described step hole.
7. compound bearing pin as claimed in claim 1 is characterized in that:
The material of described solid shaft comprises: aluminum alloy, carbon fibre material;
The material of described sleeve comprises: 40Cr, 42CrMo.
8. concrete mixer is characterized in that:
The boom of described concrete mixer saves between the arm and boom saves arm and hydraulic jack passes through hinged as any described compound bearing pin of claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320050397 CN203161809U (en) | 2013-01-30 | 2013-01-30 | Composite pin shaft and concrete pump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320050397 CN203161809U (en) | 2013-01-30 | 2013-01-30 | Composite pin shaft and concrete pump truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161809U true CN203161809U (en) | 2013-08-28 |
Family
ID=49022995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320050397 Expired - Lifetime CN203161809U (en) | 2013-01-30 | 2013-01-30 | Composite pin shaft and concrete pump truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203161809U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748168A (en) * | 2019-10-15 | 2020-02-04 | 北京科技大学 | High-strength aluminum alloy arm support based on embedded material conveying pipe structure and hinge mode thereof |
| CN113606244A (en) * | 2021-08-09 | 2021-11-05 | 长沙迈科轴承有限公司 | Pin shaft for pump truck and machining process thereof |
-
2013
- 2013-01-30 CN CN 201320050397 patent/CN203161809U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748168A (en) * | 2019-10-15 | 2020-02-04 | 北京科技大学 | High-strength aluminum alloy arm support based on embedded material conveying pipe structure and hinge mode thereof |
| CN110748168B (en) * | 2019-10-15 | 2020-11-27 | 北京科技大学 | High-strength aluminum alloy arm support based on embedded material conveying pipe structure and hinge mode thereof |
| CN113606244A (en) * | 2021-08-09 | 2021-11-05 | 长沙迈科轴承有限公司 | Pin shaft for pump truck and machining process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |