CN103016496B - Threaded connection structure, pin pulling device and boom - Google Patents
Threaded connection structure, pin pulling device and boom Download PDFInfo
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- CN103016496B CN103016496B CN201210554944.4A CN201210554944A CN103016496B CN 103016496 B CN103016496 B CN 103016496B CN 201210554944 A CN201210554944 A CN 201210554944A CN 103016496 B CN103016496 B CN 103016496B
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Abstract
The invention discloses a threaded connection structure, a pin pulling device and a boom comprising the pin pulling device. The threaded connection structure comprises a first component and a second component, wherein one of the first component and the second component is provided with a first threaded hole (11), and the other of the first component and the second component is provided with a first threaded part (21) which is matched with the first threaded hole; the first component and the second component are respectively provided with a second threaded hole (12) and a through hole (23) provided with a spacer bush(30), and are connected with each other through a second threaded part (40) which passes through the second threaded hole and the spacer bush; the two ends of the spacer bush are stopped through the head part of the second threaded part and the end face of the first component; and the first threaded part and the second threaded part are arranged in parallel. When acting force along the length direction of the first threaded part is applied to the threaded connection structure, relative rotation of the first component and the second component is prevented through the spacer bush, and tension force is borne through the spacer bush, so that the second threaded part is prevented from being sheared and tensioned.
Description
Technical field
The present invention relates to being threaded of parts, particularly, relate to a kind of screw connection structure, pin pulling out device and comprise the arm of this pin pulling out device.
Background technique
In the process being made the movement together of two parts be threaded by active force, especially when movement direction is identical with the bearing of trend of screw thread, when the deflection a little of active force, two parts may be caused to relatively rotate because of the matching gap be threaded.Such as, as depicted in figs. 1 and 2, the work pin 10 being arranged on arm afterbody is provided with the first tapped hole 11, and plate 20 of pulling pin is formed with the first threaded piece 21, and work pin 10 and plate 20 of pulling pin are threaded connection.When plate 20 of pulling pin is subject to vertical directed force F, drive work pin 10 is extracted.When directed force F offset from perpendicular a little, then work pin 10 and plate 20 of pulling pin may be caused to relatively rotate because of the matching gap between the first tapped hole 11 and the first threaded piece 21.For this reason, can on the outer surface of work pin 10, offer positioning spiro pit 13 and offer locating slot 24 on the first threaded piece 21 of plate 20 of pulling pin, by positioning threads 70 being screwed into positioning spiro pit 13 and arriving in locating slot 24, relatively rotating of can prevent from pulling pin plate 20 and work pin 10.But, the cylindrical outer surface of work pin 10 offers positioning spiro pit 13 more difficult, and positioning threads part 70 distance be screwed in locating slot 24 is difficult to control, especially when arranging multiple positioning threads part 70, the degree that multiple positioning threads 70 is screwed into is different, cause positioning threads part 70 to there is different gaps from pulling pin between plate 20, this gap cause pulling pin plate 20 and work pin 10 still can relatively rotate.In addition, when plate 20 of pulling pin relatively rotates with work pin 10, shearing force will be applied to positioning threads part 70, and cause positioning threads part 70 be out of shape or damage, and be difficult to dismounting and again install.In addition, use after a period of time, the size of locating slot 24 may broaden under the active force impact of positioning threads part 70, cannot meet positioning requirements, and the relative rotation of make to pull pin plate 20 and work pin 10 increases.
Therefore, there is the problem in relative rotation between two parts that cannot effectively prevent from being threaded connection in prior art.
Summary of the invention
The object of this invention is to provide the screw connection structure in relative rotation between a kind of two parts that effectively can prevent being threaded connection.
To achieve these goals, the invention provides a kind of screw connection structure, wherein, described screw connection structure comprises first component and second component, one in described first component and second component has the first tapped hole, another has the first threaded piece coordinated with described first tapped hole, described first component and second component have the second tapped hole and through hole respectively, spacer is provided with in described through hole, described first component and second component are by being connected with the second threaded piece of spacer through described second tapped hole, the head of two ends by described second threaded piece of described spacer and the end face backstop of described first component, described first threaded piece and the second threaded piece be arranged in parallel.
Preferably, described second tapped hole, through hole, spacer and the second threaded piece are respectively multiple.
Preferably, multiple described second tapped hole, through hole, spacer and the second threaded piece are uniform around described first threaded piece.
Preferably, the length of described spacer be greater than the gap between described first component and second component and be less than the gap between the length of described through hole and described first component and second component and.
Preferably, the matching gap of described first tapped hole and the first threaded piece is greater than the matching gap of described second tapped hole and the second threaded piece.
The present invention also provides a kind of pin pulling out device, wherein, this pin pulling out device comprises work pin and plate of pulling pin, described work pin and of pulling pin in plate have the first tapped hole, another has the first threaded piece coordinated with described first tapped hole, described work pin and plate of pulling pin have the second tapped hole and through hole respectively, spacer is provided with in described through hole, described work pin and plate of pulling pin are by being connected with the second threaded piece of spacer through described second tapped hole, the head of two ends by described second threaded piece of described spacer and the end face backstop of described work pin, described first threaded piece and the second threaded piece be arranged in parallel.
Preferably, described second tapped hole, through hole, spacer and the second threaded piece are respectively multiple.
Preferably, multiple described second tapped hole, through hole, spacer and the second threaded piece are uniform around described first threaded piece.
Preferably, the length of described spacer be greater than described work pin and the gap of pulling pin between plate and be less than the length of described through hole and the gap of described work pin and plate of pulling pin and.
Preferably, the matching gap of described first tapped hole and the first threaded piece is greater than the matching gap of described second tapped hole and the second threaded piece.
Preferably, the bottom of described work pin is provided with described first tapped hole, described in plate of pulling pin comprise main body and the first threaded piece be on the body set, described through hole and the second tapped hole are respectively formed on described main body and work pin.
Preferably, the periphery of described work pin arranges flange, the arranged outside of described work pin has spring, and described flange is fixed in one end of this spring.
The present invention also provides a kind of arm, and wherein, this arm comprises pin pulling out device of the present invention.
Pass through technique scheme, when first component and/or second component are applied active force with make first component and second component have relative away from trend time, second threaded piece stops relatively rotating of first component and second component by spacer, avoid the second threaded piece to be sheared, meanwhile, a part for spacer still can be arranged in through hole, to bear pulling force, avoid the screw thread tension of the second threaded piece, thus prevent the second threaded piece damage, extend its working life.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram that the work pin of prior art and the linkage structure of plate of pulling pin are described;
Fig. 2 is the sectional view along A-A line in Fig. 1;
Fig. 3 illustrates work pin of the present invention and the structural representation of a kind of mode of execution of the screw connection structure of plate formation of pulling pin;
Fig. 4 is the sectional view along B-B line in Fig. 3;
Fig. 5 is the sectional view of the position relationship that plate of pulling pin, work pin, spacer and the second threaded piece are described in process of pulling pin;
Fig. 6 illustrates that work pin is arranged on the schematic diagram of arm afterbody with plate of pulling pin.
Description of reference numerals
10: work pin
11: the first tapped hole 12: the second tapped holes 13: positioning spiro pit 14: flange
20: plate of pulling pin
21: the first threaded pieces 22: main body 23: through hole 24: positioning screw groove
30: spacer 40: the second threaded piece 50: spring 60: arm 61: blocked part
70: positioning threads part
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to reference to upper and lower, left and right shown in the drawings; " inside and outside " refers to profile inside and outside relative to each parts itself.
According to an aspect of the present invention, a kind of screw connection structure is provided, wherein, described screw connection structure comprises first component and second component, one in described first component and second component has the first tapped hole 11, another has the first threaded piece 21 coordinated with described first tapped hole, described first component and second component have the second tapped hole 12 and through hole 23 respectively, spacer 30 is provided with in described through hole 23, described first component and second component are by being connected with the second threaded piece 40 of spacer 30 through described second tapped hole 12, the two ends of described spacer 30 are by the described head of the second threaded piece 40 and the end face backstop of described first component, described first threaded piece 21 and the second threaded piece 40 be arranged in parallel.
In screw connection structure of the present invention, when first component and/or second component are applied active force with make first component and second component have relative away from trend time, second threaded piece 40 stops relatively rotating of first component and second component by spacer 30, avoids the second threaded piece 40 and is sheared.Meanwhile, spacer 30 is arranged in through hole 23, to bear pulling force, avoids the screw thread tension of the second threaded piece 40, thus prevents the second threaded piece 40 from damaging, and extends its working life.
Preferably, the matching gap of described first tapped hole 11 and the first threaded piece 21 is greater than the matching gap of described second tapped hole 12 and the second threaded piece 40.Under this preferable case, because the matching gap of the first threaded piece and the first tapped hole is comparatively large, also namely the size of the first threaded piece 21 is comparatively large, and thus first component and second component are fixed mainly through the first threaded piece 21, and are located by the second threaded piece 40.When first component and/or second component are applied active force with make first component and second component have relative away from trend time, because the matching gap of the first threaded piece 21 and the first tapped hole 11 is comparatively large, cause first component and second component occur along the first threaded piece 21 length direction relative away from.Now, the matching gap for the second threaded piece 40 and the second tapped hole 12 is less, and the second threaded piece 40 is fixed by the second tapped hole 12, and spacer 30 thus will be caused to move relative to through hole 23, until the first threaded piece 21 is fixed by the first tapped hole 11.After this, in force process, second threaded piece 40 stops relatively rotating of first component and second component by spacer 30, avoid the second threaded piece 40 to be sheared, meanwhile, a part for spacer 30 can still be arranged in through hole 23, to bear pulling force, avoid the screw thread tension of the second threaded piece 40, thus prevent the second threaded piece 40 from damaging, extend its working life.
Preferably, described second tapped hole 12, through hole 23, spacer 30 and the second threaded piece 40 can be respectively multiple, so that uniform stressed.More preferably, multiple described second tapped hole 12, through hole 23, spacer 30 and the second threaded piece 40 are uniform around described first threaded piece 21.
In addition, to lead the movement of spacer 30 owing to using through hole 23, depart from through hole 23 for avoiding spacer 30 and guarantee that spacer 30 can play and prevent from acting in relative rotation, the length of described spacer 30 can be made to be greater than the gap between described first component and second component and be less than the length of described through hole 23 and the gap between described first component and second component and.
First component of the present invention and second component can be the various component be threaded connection suitably, and such as, described first component can be work pin 10, and described second component is plate 20 of pulling pin.
According to a further aspect in the invention, a kind of pin pulling out device is provided, wherein, this pin pulling out device comprises work pin 10 and plate 20 of pulling pin, described work pin 10 and of pulling pin in plate 20 have the first tapped hole 11, another has the first threaded piece 21 coordinated with described first tapped hole, described work pin 10 and plate 20 of pulling pin have the second tapped hole 12 and through hole 23 respectively, spacer 30 is provided with in described through hole 23, described work pin 10 and plate 20 of pulling pin are by being connected with the second threaded piece 40 of spacer 30 through described second tapped hole 12, the head of two ends by described second threaded piece 40 of described spacer 30 and the end face backstop of described work pin 10, described first threaded piece 21 and the second threaded piece 40 be arranged in parallel.
According to a further aspect in the invention, also provide a kind of arm, wherein, this arm comprises pin pulling out device of the present invention.
Illustrate pin pulling out device of the present invention below.Preferably, the bottom of described work pin 10 is provided with described first tapped hole 11, described in plate 20 of pulling pin comprise main body 22 and be arranged on the first threaded piece 21 in described main body 22.Certainly, vice versa.
In addition, for ease of installing, described through hole 23 and the second tapped hole 12 can be respectively formed on described main body 22 and work pin 10.Thus, after be threaded by the first tapped hole 11 and the first threaded piece 21 work pin 10 and plate 20 of pulling pin, the operation of installation second threaded piece 40 can be carried out easily from the below of plate 20 of pulling pin.
In addition, preferably, the periphery of described work pin 10 can arrange flange 14, the arranged outside of described work pin 10 has (resetting for the plate 20 that makes to pull pin) spring 50, described flange 14 is fixed in one end of this spring 50.By arranging flange 14 and spring 50, in the process of pulling pin, the active force of spring 50 can be utilized easily to make spacer 23 return.Particularly, the advantage of pin pulling out device of the present invention is described with the operation of pulling pin of work pin 10 and plate 20 of pulling pin below.
Fig. 3 and Figure 4 shows that and extract state before work pin 10 by plate 20 of pulling pin.Now, the end face laminating of work pin 10 and plate 20 of pulling pin, spacer 30 is positioned at through hole 23 completely.When applying active force (such as applying this active force by oil cylinder with pin) vertically downward to plate 20 of pulling pin, because the matching gap between the first tapped hole 11 and the first threaded piece 21 is comparatively large, the plate 20 that causes pulling pin moves down relative to work pin 10.In this moving process, spacer 30 can move up relative to through hole 23, until the first tapped hole 11 and the first threaded piece 21 engage, described active force will drive work pin 10 to extract by plate 20 of pulling pin.Although spacer 30 moves axially relative to through hole 23, the bottom of spacer 30 is still positioned at through hole 23, as shown in Figure 5.In the process of pulling pin, second threaded piece 40 can stop work pin 10 by spacer 30 and the relatively rotating of plate 20 of pulling pin, avoid the second threaded piece 40 to be sheared, simultaneously, a part for spacer 30 can still be arranged in through hole 23, to bear pulling force, avoids the screw thread tension of the second threaded piece 40, thus prevent the second threaded piece 40 from damaging, extend its working life.In addition, when being subject to downward active force, can there is axial float along through hole 23 in spacer 30, avoids the second threaded piece 40 tension.
In the embodiment shown in fig. 6, the column part that arm 60 has a permission work pin 10 by but the blocked part 61 not allowing spring 50 to pass through, to limit the extraction distance of work pin 10.In the process of pulling pin, spring 50 is compressed by flange 14 and blocked part 61.After stroke of pulling pin terminates, the cushion effect that spring 50 applies upwards to work pin 10, the active force that work pin 20 also applies upwards by the first threaded piece 21 to plate 20 of pulling pin, the plate 20 that causes pulling pin moves up relative to work pin 10.This moves up and causes spacer 30 to move down relative to through hole 23, makes spacer 30 get back to the position be located substantially in through hole 23, namely substantially gets back to the state shown in Fig. 3 and Fig. 4.
In the present invention, spacer 30 is relative to the matching gap moved axially for compensating the first threaded piece 21 and the first tapped hole 11 of through hole 23, and the factor such as machining accuracy and assembly error of the length of spacer 30, first component and second component determines the position of spacer 30 relative to through hole 23.In other words, before pulling pin or after pulling pin, spacer 30 is in the first limit position, and in the mode of execution shown in Fig. 3 and Fig. 4, spacer 30 is positioned at through hole 23 (when the length of spacer 30 is longer, through hole 23 can be exposed in its top) completely; When carrying out pulling pin operation, when spacer 30 moves ultimate range relative to through hole 23, spacer 30 is in the second limit position, the position namely shown in Fig. 5.
In the present invention, spacer 30 can use suitable rigid material to make, to stop relatively rotating and bearing pulling force of first component and second component.Such as, 45# steel can be used to make.In addition, slide in through hole 23 for ease of spacer 30, through hole 23 can be processed into unthreaded hole.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (13)
1. a screw connection structure, it is characterized in that, described screw connection structure comprises first component and second component, one in described first component and second component has the first tapped hole (11), another has the first threaded piece (21) coordinated with described first tapped hole, described first component and second component have the second tapped hole (12) and through hole (23) respectively, spacer (30) is provided with in described through hole (23), described first component and second component are by being connected with second threaded piece (40) of spacer (30) through described second tapped hole (12), the two ends of described spacer (30) are by the described head of the second threaded piece (40) and the end face backstop of described first component, described first threaded piece (21) and the second threaded piece (40) be arranged in parallel.
2. screw connection structure according to claim 1, wherein, described second tapped hole (12), through hole (23), spacer (30) and the second threaded piece (40) are respectively multiple.
3. screw connection structure according to claim 2, wherein, multiple described second tapped hole (12), through hole (23), spacer (30) and the second threaded piece (40) are uniform around described first threaded piece (21).
4. screw connection structure according to claim 1, wherein, the length of described spacer (30) be greater than the gap between described first component and second component and be less than the length of described through hole (23) and the gap between described first component and second component and.
5. according to the screw connection structure in claim 1-4 described in any one, wherein, the matching gap of described first tapped hole (11) and the first threaded piece (21) is greater than the matching gap of described second tapped hole (12) and the second threaded piece (40).
6. a pin pulling out device, it is characterized in that, this pin pulling out device comprises work pin (10) and plate of pulling pin (20), one in described work pin (10) and plate of pulling pin (20) has the first tapped hole (11), another has the first threaded piece (21) coordinated with described first tapped hole, described work pin (10) and plate of pulling pin (20) have the second tapped hole (12) and through hole (23) respectively, spacer (30) is provided with in described through hole (23), described work pin (10) and plate of pulling pin (20) are by being connected with second threaded piece (40) of spacer (30) through described second tapped hole (12), the head of two ends by described second threaded piece (40) of described spacer (30) and the end face backstop of described work pin (10), described first threaded piece (21) and the second threaded piece (40) be arranged in parallel.
7. pin pulling out device according to claim 6, wherein, described second tapped hole (12), through hole (23), spacer (30) and the second threaded piece (40) are respectively multiple.
8. pin pulling out device according to claim 7, wherein, multiple described second tapped hole (12), through hole (23), spacer (30) and the second threaded piece (40) are uniform around described first threaded piece (21).
9. pin pulling out device according to claim 6, wherein, the length of described spacer (30) be greater than the gap between described work pin (10) and plate of pulling pin (20) and be less than the length of described through hole (23) and the gap of described work pin (10) and plate of pulling pin (20) and.
10. according to the pin pulling out device in claim 6-9 described in any one, wherein, the matching gap of described first tapped hole (11) and the first threaded piece (21) is greater than the matching gap of described second tapped hole (12) and the second threaded piece (40).
11. pin pulling out device according to claim 6, wherein, the bottom of described work pin (10) is provided with described first tapped hole (11), described plate of pulling pin (20) comprises main body (22) and is arranged on the first threaded piece (21) in described main body (22), and described through hole (23) and the second tapped hole (12) are respectively formed in described main body (22) and work pin (10).
12. pin pulling out device according to claim 11, wherein, the periphery of described work pin (10) arranges flange (14), the arranged outside of described work pin (10) has spring (50), and described flange (14) is fixed in one end of this spring (50).
13. 1 kinds of arms, is characterized in that, this arm comprises according to the pin pulling out device in claim 6-12 described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210554944.4A CN103016496B (en) | 2012-12-19 | 2012-12-19 | Threaded connection structure, pin pulling device and boom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210554944.4A CN103016496B (en) | 2012-12-19 | 2012-12-19 | Threaded connection structure, pin pulling device and boom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103016496A CN103016496A (en) | 2013-04-03 |
| CN103016496B true CN103016496B (en) | 2015-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210554944.4A Active CN103016496B (en) | 2012-12-19 | 2012-12-19 | Threaded connection structure, pin pulling device and boom |
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| CN (1) | CN103016496B (en) |
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| US5069176A (en) * | 1986-05-16 | 1991-12-03 | Audi Ag | Internal combustion engine |
| CN201960523U (en) * | 2011-01-05 | 2011-09-07 | 中国石油集团西部钻探工程有限公司 | Simple and fast pin puller |
| CN202226573U (en) * | 2011-08-17 | 2012-05-23 | 三一汽车起重机械有限公司 | Arm pin structure and construction machine with same |
| CN202346644U (en) * | 2011-11-28 | 2012-07-25 | 中联重科股份有限公司 | Arm pin mechanism of suspension arm mechanism and lifting device containing arm pin mechanism |
| CN202971515U (en) * | 2012-12-19 | 2013-06-05 | 中联重科股份有限公司 | Threaded connection structure, pin pulling device and suspension arm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2508104Y2 (en) * | 1990-05-29 | 1996-08-21 | 株式会社タダノ | Coupling device for telescopic cylinder in telescopic boom |
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2012
- 2012-12-19 CN CN201210554944.4A patent/CN103016496B/en active Active
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|---|---|---|---|---|
| US5069176A (en) * | 1986-05-16 | 1991-12-03 | Audi Ag | Internal combustion engine |
| CN201960523U (en) * | 2011-01-05 | 2011-09-07 | 中国石油集团西部钻探工程有限公司 | Simple and fast pin puller |
| CN202226573U (en) * | 2011-08-17 | 2012-05-23 | 三一汽车起重机械有限公司 | Arm pin structure and construction machine with same |
| CN202346644U (en) * | 2011-11-28 | 2012-07-25 | 中联重科股份有限公司 | Arm pin mechanism of suspension arm mechanism and lifting device containing arm pin mechanism |
| CN202971515U (en) * | 2012-12-19 | 2013-06-05 | 中联重科股份有限公司 | Threaded connection structure, pin pulling device and suspension arm |
Non-Patent Citations (1)
| Title |
|---|
| 起重臂伸缩机构原理的研究;郑红 等;《煤矿机械》;20100615;第31卷(第6期);第69-71页 * |
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