CN103016496A - Threaded connection structure, pin pulling device and boom - Google Patents
Threaded connection structure, pin pulling device and boom Download PDFInfo
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- CN103016496A CN103016496A CN2012105549444A CN201210554944A CN103016496A CN 103016496 A CN103016496 A CN 103016496A CN 2012105549444 A CN2012105549444 A CN 2012105549444A CN 201210554944 A CN201210554944 A CN 201210554944A CN 103016496 A CN103016496 A CN 103016496A
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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
By active force so that two parts that are threaded together in the mobile process, especially in the movement direction situation identical with the bearing of trend of screw thread, when a little deflection of active force, may relatively rotate because the matching gap that is threaded causes two parts.For example, as depicted in figs. 1 and 2, be installed on the work pin 10 of arm afterbody and be provided with the first tapped hole 11, the plate 20 of pulling pin is formed with the first threaded piece 21, so that work pin 10 and the plate 20 of pulling pin are threaded connection.When the plate 20 of pulling pin is subject to vertical directed force F, will drives work pin 10 and extract.When active force F offset from perpendicular a little, then may relatively rotate because the matching gap between the first tapped hole 11 and the first threaded piece 21 causes work pin 10 and the plate 20 of pulling pin.For this reason, can offer positioning spiro pit 13 and offer locating slot 24 at the first threaded piece 21 of the plate 20 of pulling pin at the outer surface of work pin 10, by 70 of positioning threads being screwed into positioning spiro pit 13 and arriving in the locating slot 24, the relatively rotating of can prevent from pulling pin plate 20 and work pin 10.But, offer relatively difficulty of positioning spiro pit 13 at the cylindrical outer surface of work pin 10, and the distance that positioning threads part 70 is screwed in the locating slot 24 is difficult to control, especially when a plurality of positioning threads part 70 is set, the degree that 70 of a plurality of positioning threads are screwed into is different, cause positioning threads part 70 to have different gaps between the plate 20 from pulling pin, this gap cause pulling pin plate 20 and work pin 10 still can relatively rotate.In addition, when pull pin plate 20 and the pin 10 of working relatively rotate, will apply shearing force to positioning threads part 70, cause 70 distortion of positioning threads part or damage, and be difficult to dismounting and again install.In addition, after use a period of time, the size of locating slot 24 may broaden under the active force impact of positioning threads part 70, can't satisfy positioning requirements, so that the relative rotation increase of pull pin plate 20 and work pin 10.
Therefore, the in relative rotation problem between two parts that existence can't effectively prevent from being threaded connection in the prior art.
Summary of the invention
The purpose of this invention is to provide the in relative rotation screw connection structure between a kind of two parts that can effectively prevent from 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 the second component has the first tapped hole, another has the first threaded piece that cooperates with described the first tapped hole, described first component and second component have respectively the second tapped hole and through hole, be provided with spacer in the described through hole, described first component and second component are connected the second threaded piece and are connected by passing described the second tapped hole with spacer, the two ends of described spacer are by the end face backstop of head and the described first component of described the second threaded piece, and described the first threaded piece and the second threaded piece be arranged in parallel.
Preferably, described the second tapped hole, through hole, spacer and the second threaded piece are respectively a plurality of.
Preferably, a plurality of described the second tapped holes, through hole, spacer and the second threaded piece are uniform around described the first threaded piece.
Preferably, the length of described spacer greater than the gap between described first component and the second component and less than the length of described through hole and the gap between described first component and the second component and.
Preferably, the matching gap of described the first tapped hole and the first threaded piece is greater than the matching gap of described the 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 the work pin and the plate of pulling pin, one in described work pin and the plate of pulling pin has the first tapped hole, another has the first threaded piece that cooperates with described the first tapped hole, described work pin and the plate of pulling pin have respectively the second tapped hole and through hole, be provided with spacer in the described through hole, described work pin is connected the second threaded piece and is connected by passing described the second tapped hole with the plate of being connected with spacer, the two ends of described spacer are by the end face backstop of head and the described work pin of described the second threaded piece, and described the first threaded piece and the second threaded piece be arranged in parallel.
Preferably, described the second tapped hole, through hole, spacer and the second threaded piece are respectively a plurality of.
Preferably, a plurality of described the second tapped holes, through hole, spacer and the second threaded piece are uniform around described the first threaded piece.
Preferably, the length of described spacer greater than described work pin and pull pin between the plate the gap and less than the gap of the length of described through hole and described work pin and the plate of pulling pin and.
Preferably, the matching gap of described the first tapped hole and the first threaded piece is greater than the matching gap of described the second tapped hole and the second threaded piece.
Preferably, the bottom of described work pin is provided with described the first tapped hole, and the described plate of pulling pin comprises main body and the first threaded piece that is arranged on the described main body, and described through hole and the second tapped hole are respectively formed on described main body and the work pin.
Preferably, on the periphery of described work pin flange is set, the arranged outside of described work pin has spring, and an end of this spring is fixed in described flange.
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 so that first component and second component have relative away from trend the time, the second threaded piece stops relatively rotating of first component and second component by spacer, avoided the second threaded piece to be sheared, simultaneously, the part of spacer can still be arranged in through hole, with bearing tension, avoid the screw thread tension of the second threaded piece, thereby prevented the damage of the second threaded piece, prolonged its working life.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic representation of the linkage structure of the work pin of explanation prior art and the plate of pulling pin;
Fig. 2 is the sectional view along A-A line among Fig. 1;
Fig. 3 is the structural representation of explanation work pin of the present invention and a kind of mode of execution of the screw connection structure of the plate formation of pulling pin;
Fig. 4 is the sectional view along B-B line among Fig. 3;
Fig. 5 is the sectional view that the position relationship of the plate of pulling pin in the process of pulling pin, work pin, spacer and the second threaded piece is described;
Fig. 6 is the schematic representation that explanation work pin and the plate of pulling pin are installed in the arm afterbody.
Description of reference numerals
10: the work pin
12: the second tapped holes 13 of 11: the first tapped holes: positioning spiro pit 14: flange
20: the plate of pulling pin
Threaded piece 22 in 21: the first: main body 23: through hole 24: the positioning screw groove
30: 40: the second threaded pieces 50 of spacer: spring 60: arm 61: blocked part
70: the positioning threads part
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.Should be understood that embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
In the present invention, do not doing in the situation of opposite explanation the upper and lower, left and right of the noun of locality of use shown in " upper and lower, left and right " typically refer to reference to the accompanying drawings; " inside and outside " refers to inside and outside with respect to the profile of 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 the second component has the first tapped hole 11, another has the first threaded piece 21 that cooperates with described the first tapped hole, described first component and second component have respectively the second tapped hole 12 and through hole 23, be provided with spacer 30 in the described through hole 23, described first component and second component connect by the second threaded piece 40 that passes described the second tapped hole 12 and are connected with spacer, the two ends of described spacer 30 are by the end face backstop of head and the described first component of described the second threaded piece 40, and described the first threaded piece 21 and the second threaded piece 40 be arranged in parallel.
In the screw connection structure of the present invention, when first component and/or second component are applied active force so that first component and second component have relative away from trend the time, the second threaded piece 40 stops relatively rotating of first component and second component by spacer 30, has avoided the second threaded piece 40 to be sheared.Simultaneously, spacer 30 is arranged in through hole 23, with bearing tension, has avoided the screw thread tension of the second threaded piece 40, thereby prevents 40 damages of the second threaded piece, prolongs its working life.
Preferably, the matching gap of described the first tapped hole 11 and the first threaded piece 21 is greater than the matching gap of described the 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 larger, also namely the size of the first threaded piece 21 is larger, thereby first component and second component are mainly fixing by the first threaded piece 21, and by the second threaded piece 40 location.When first component and/or second component are applied active force so that first component and second component have relative away from trend the time, because the matching gap of the first threaded piece 21 and the first tapped hole 11 is larger, cause first component and second component occur along the length direction of the first threaded piece 21 relative away from.At this moment, the matching gap that is used for the second threaded piece 40 and the second tapped hole 12 is less, and the second threaded piece 40 is fixing by the second tapped hole 12, thereby will cause spacer 30 to move with respect to through hole 23, until the first threaded piece 21 is fixing by the first tapped hole 11.After this, in application of force process, the second threaded piece 40 stops relatively rotating of first component and second component by spacer 30, avoided the second threaded piece 40 to be sheared, simultaneously, the part of spacer 30 can still be arranged in through hole 23, with bearing tension, avoid the screw thread tension of the second threaded piece 40, thereby prevented 40 damages of the second threaded piece, prolonged its working life.
Preferably, described the second tapped hole 12, through hole 23, spacer 30 and the second threaded piece 40 can be respectively a plurality of, so that uniform stressed.More preferably, a plurality of described the second tapped holes 12, through hole 23, spacer 30 and the second threaded piece 40 are uniform around described the first threaded piece 21.
In addition, owing to use the movement of through hole 23 guiding spacers 30, prevent from acting in relative rotation for avoiding spacer 30 to break away from through holes 23 and guaranteeing that spacer 30 can play, the length that can make described spacer 30 greater than the gap between described first component and the second component and less than the length of described through hole 23 and the gap between described first component and the second component with.
First component of the present invention and second component can be the various suitable component that are threaded connection, and for example, described first component can be work pin 10, and described second component is the 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 the plate 20 of pulling pin, one in described work pin 10 and the plate 20 of pulling pin has the first tapped hole 11, another has the first threaded piece 21 that cooperates with described the first tapped hole, described work pin 10 and the plate 20 of pulling pin have respectively the second tapped hole 12 and through hole 23, be provided with spacer 30 in the described through hole 23, described work pin 10 connects by passing the second threaded piece 40 that described the second tapped hole 12 is connected with spacer with the plate 20 of being connected, the two ends of described spacer 30 are by the end face backstop of head and the described work pin 10 of described the second threaded piece 40, and described the 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.
The below specifies pin pulling out device of the present invention.Preferably, the bottom of described work pin 10 is provided with described the first tapped hole 11, and the described plate 20 of pulling pin comprises main body 22 and the first threaded piece 21 that is arranged on the 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 the work pin 10.Thus, can be behind be threaded by the first tapped hole 11 and the first threaded piece 21 work pin 10 and the plate 20 of pulling pin, the operation of the second threaded piece 40 being installed easily from the below of the plate 20 of pulling pin.
In addition, preferably, on the periphery of described work pin 10 flange 14 can be set, the arranged outside of described work pin 10 has (being used for the plate 20 of pulling pin is resetted) spring 50, and an end of this spring 50 is fixed in described flange 14.By flange 14 and spring 50 are set, can in the process of pulling pin, utilize easily the active force of spring 50 to make spacer 23 returns.Particularly, the below illustrates the advantage of pin pulling out device of the present invention with the operation of pulling pin of work pin 10 and the plate 20 of pulling pin.
Fig. 3 extracts work pin 10 state before with Figure 4 shows that by the plate 20 of pulling pin.At this moment, the end face of work pin 10 and the plate 20 of pulling pin is fitted, and spacer 30 is positioned at through hole 23 fully.When the active force (for example applying this active force by oil cylinder with pin) that the plate 20 of pulling pin applied vertically downward, because the matching gap between the first tapped hole 11 and the first threaded piece 21 is larger, the plate 20 that causes pulling pin moves down with respect to work pin 10.In this moving process, spacer 30 can move up with respect 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 by the plate 20 of pulling pin and extract.Although spacer 30 moves axially with respect to through hole 23, the bottom of spacer 30 still is positioned at through hole 23, as shown in Figure 5.In the process of pulling pin, the second threaded piece 40 can stop relatively rotating of work pin 10 and the plate 20 of pulling pin by spacer 30, avoided the second threaded piece 40 to be sheared, simultaneously, the part of spacer 30 can still be arranged in through hole 23, with bearing tension, has avoided the screw thread tension of the second threaded piece 40, thereby prevent 40 damages of the second threaded piece, prolong its working life.In addition, when being subject to downward active force, axial float can occur along through hole 23 in spacer 30, has avoided the second threaded piece 40 tensions.
In mode of execution shown in Figure 7, the column part that arm 60 has a permission work pin 10 by but the blocked part 61 that do not allow spring 50 to pass through, to limit the extraction distance of work pin 10.In the process of pulling pin, spring 50 is by flange 14 and blocked part 61 compressions.After the stroke of pulling pin finished, 50 pairs of work pins 10 of spring applied cushion effect upwards, and work pin 20 also applies active force upwards by 21 pairs of the first threaded pieces plate 20 of pulling pin, and the plate 20 that causes pulling pin moves up with respect to work pin 10.This moves up and causes spacer 30 to move down with respect to through hole 23, so that spacer 30 is got back to the position that is located substantially in the through hole 23, namely basically gets back to Fig. 3 and state shown in Figure 4.
Among the present invention, spacer 30 moves axially for the matching gap that compensates the first threaded piece 21 and the first tapped hole 11 with respect to through hole 23, and the factors such as the machining accuracy of the length of spacer 30, first component and second component and assembly error have determined the position of spacer 30 with respect to through hole 23.In other words, after pulling pin front or pulling pin, spacer 30 is in the first limit position, and in Fig. 3 and mode of execution shown in Figure 4, spacer 30 is positioned at through hole 23 (when the length of spacer 30 was longer, through hole 23 can be exposed in its top) fully; When pulling pin operation, when spacer 30 moved ultimate range with respect to through hole 23, spacer 30 was in the second limit position, i.e. position shown in Figure 5.
Among the present invention, spacer 30 can use suitable rigid material to make, to stop relatively rotating and bearing tension of first component and second component.For example, can use the 45# steel to make.In addition, slide in through hole 23 for ease of spacer 30, through hole 23 can be processed into unthreaded hole.
Below describe by reference to the accompanying drawings preferred implementation of the present invention in detail; but; the present invention is not limited to the detail in the above-mentioned mode of execution; in technical conceive scope 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.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the present invention is to the no longer separately explanation of various possible compound modes.
In addition, also can carry out combination in any between the various 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. screw connection structure, it is characterized in that, described screw connection structure comprises first component and second component, one in described first component and the second component has the first tapped hole (11), another has the first threaded piece (21) that cooperates with described the first tapped hole, described first component and second component have respectively the second tapped hole (12) and through hole (23), be provided with spacer (30) in the described through hole (23), described first component is connected 30 by passing described the second tapped hole (12) with spacer with second component) the second threaded piece (40) connect, the two ends of described spacer (30) are by the end face backstop of head and the described first component of described the second threaded piece (40), and described the first threaded piece (21) and the second threaded piece (40) be arranged in parallel.
2. screw connection structure according to claim 1, wherein, described the second tapped hole (12), through hole (23), spacer (30) and the second threaded piece (40) are respectively a plurality of.
3. screw connection structure according to claim 2, wherein, a plurality of described the second tapped holes (12), through hole (23), spacer (30) and the second threaded piece (40) are uniform around described the first threaded piece (21).
4. screw connection structure according to claim 1, wherein, the length of described spacer (30) greater than the gap between described first component and the second component and less than the length of described through hole (23) and the gap between described first component and the second component and.
5. the described screw connection structure of any one according to claim 1-4, wherein, the matching gap of described the first tapped hole (11) and the first threaded piece (21) is greater than the matching gap of described the second tapped hole (12) and the second threaded piece (40).
6. pin pulling out device, it is characterized in that, this pin pulling out device comprises work pin (10) and the plate of pulling pin (20), one in described work pin (10) and the plate of pulling pin (20) has the first tapped hole (11), another has the first threaded piece (21) that cooperates with described the first tapped hole, described work pin (10) and the plate of pulling pin (20) have respectively the second tapped hole (12) and through hole (23), be provided with spacer (30) in the described through hole (23), described work pin (10) is connected 30 by passing described the second tapped hole (12) with spacer with the plate of being connected (20)) the second threaded piece (40) connect, the two ends of described spacer (30) are by the end face backstop of head and the described work pin (10) of described the second threaded piece (40), and described the 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 the second tapped hole (12), through hole (23), spacer (30) and the second threaded piece (40) are respectively a plurality of.
8. pin pulling out device according to claim 7, wherein, a plurality of described the second tapped holes (12), through hole (23), spacer (30) and the second threaded piece (40) are uniform around described the first threaded piece (21).
9. pin pulling out device according to claim 6, wherein, the length of described spacer (30) greater than the gap between described work pin (10) and the plate of pulling pin (20) and less than the gap of the length of described through hole (23) and described work pin (10) and the plate of pulling pin (20) and.
10. the described pin pulling out device of any one according to claim 6-9, wherein, the matching gap of described the first tapped hole (11) and the first threaded piece (21) is greater than the matching gap of described the 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 the first tapped hole (11), the described plate of pulling pin (20) comprises main body (22) and is arranged on the first threaded piece (21) on the described main body (22) that described through hole (23) and the second tapped hole (12) are respectively formed on described main body (22) and the work pin (10).
12. pin pulling out device according to claim 11 wherein, arranges flange (14) on the periphery of described work pin (10), the arranged outside of described work pin (10) has spring (50), and an end of this spring (50) is fixed in described flange (14).
13. an arm is characterized in that, this arm comprises according to claim 6 the described pin pulling out device of any one in-12.
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 true CN103016496A (en) | 2013-04-03 |
| CN103016496B 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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| US5069176A (en) * | 1986-05-16 | 1991-12-03 | Audi Ag | Internal combustion engine |
| JP2508104Y2 (en) * | 1990-05-29 | 1996-08-21 | 株式会社タダノ | Coupling device for telescopic cylinder in telescopic boom |
| 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 |
-
2012
- 2012-12-19 CN CN201210554944.4A patent/CN103016496B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5069176A (en) * | 1986-05-16 | 1991-12-03 | Audi Ag | Internal combustion engine |
| JP2508104Y2 (en) * | 1990-05-29 | 1996-08-21 | 株式会社タダノ | Coupling device for telescopic cylinder in telescopic boom |
| 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 |
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| Title |
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| 郑红 等: "起重臂伸缩机构原理的研究", 《煤矿机械》 * |
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