CN202226573U - Arm pin structure and construction machine with same - Google Patents
Arm pin structure and construction machine with same Download PDFInfo
- Publication number
- CN202226573U CN202226573U CN2011202997543U CN201120299754U CN202226573U CN 202226573 U CN202226573 U CN 202226573U CN 2011202997543 U CN2011202997543 U CN 2011202997543U CN 201120299754 U CN201120299754 U CN 201120299754U CN 202226573 U CN202226573 U CN 202226573U
- Authority
- CN
- China
- Prior art keywords
- arm
- arm pin
- pin
- latch structure
- hole
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model provides an arm pin structure and a construction machine with the arm pin structure. The arm pin structure comprises an arm pin and an adjusting screw rod, wherein a stepped hole is formed at the first end of the arm pin in the axial direction; a sliding chute extending in the axial direction is formed in the middle of the arm pin; the adjusting screw rod embedded in the stepped hole comprises a screw rod head part and a threaded rod part; the threaded rod part penetrates the sliding chute; and a rolling structure is mounted between the screw rod head part of the adjusting screw rod and the step part of the stepped hole. After the adoption of the technical scheme, the damage and the deformation of the adjusting screw rod can be reduced, the cost is saved, and the work efficiency is improved.
Description
Technical field
The utility model relates to engineering machinery field, more specifically, relates to a kind of arm latch structure and has the construction machinery and equipment of this arm latch structure.
Background technology
At present, in large-tonnage telescopic boom hoisting crane, extensively adopt the single-cylinder bolt technology, known arm latch structure is as shown in Figure 3, comprises screw rod 1 ', arm pin 2 ', spring 3 ', bearing pin 4 ', jam nut 5 ', spring perch 6 '.
Spring perch 6 ' is fixedly mounted on the joint crane arm.Arm pin 2 ' is set in the hole of spring perch 6 ' and can axially moves along this hole, the end of first end of arm pin 2 ' (being arm pin left end among Fig. 3) for matching with the arm pin-and-hole of adjacent crane arm.The two ends of spring 3 ' are spacing by defining flange and spring perch 6 ' near arm pin 2 ' first end respectively.Second end of arm pin 2 ' generally drives with the arm pin inserting mechanism through attaching parts and is connected.
The middle part of first end of arm pin 2 ' offers the stepped hole that extends vertically, and the inner of stepped hole is connected with axially extended chute, and chute also is connected with the axial hole of offering from arm pin 2 ' second end.Bearing pin 4 ' radially is installed in the pin shaft hole of spring perch 6 ', and bearing pin 4 ' passes chute and cooperates slidably with chute.
Screw rod 1 ' is installed in the stepped hole, and the head of screw rod 1 ' is positioned at the heavy caliber hole section of stepped hole, and spiro rod section passes successively to stretch in the axial hole after the small-diameter hole section, chute of stepped hole and is connected with jam nut.The part that bearing pin 4 ' is positioned at chute is provided with internal thread hole, and the internal thread hole that spiro rod section is located in part and bearing pin 4 ' in the chute is spirally connected.
The principle of work of this arm latch structure is such: when adjacent two joint crane arms were in coupled condition, wherein first end of the arm pin 2 ' of a joint crane arm stretched in the arm pin-and-hole (not shown) of another joint crane arm.When needs separated two adjacent joint crane arms, the direction (being equivalent to the right direction among Fig. 3) of arm pin 2 ' compression spring 3 ' in the driving lower edge of arm pin inserting mechanism axially moved, and first end of arm pin 2 ' is by extracting in the arm pin-and-hole.When needs connect adjacent two joints during crane arms once more; The Control arm pin inserting mechanism is not to the arm pin 2 ' application of force; Then stretch out in arm pin 2 ' left side in trend Fig. 3 under the effect of spring 3 '; First end of arm pin 2 ' inserts in the arm pin-and-hole of adjacent crane arm once more, realizes the connection of adjacent two joint crane arms.
When this arm latch structure was in normal working, screw rod 1 ' head was positioned at the heavy caliber hole section of stepped hole, and generally speaking not with stepped hole in stage portion contact, not influence the normal axial stretching of arm pin.When removing the annexation of adjacent two joint crane arms; Arm pin 2 ' is when stretching out state in case the arm pin inserting mechanism that actuating arm pin 2 ' is extracted from the arm pin-and-hole is out of order; Then need this moment artificially turn screw rod 1 ' head with spanner, the stage portion continued that is compressed to stepped hole at screw rod 1 ' head is tightened screw rod 1 ' head (referring to Fig. 3), moves towards the direction of compression spring 3 ' thereby drive arm pin 2 '; Finally make the 2 ' withdrawal of arm pin, realize separating of the adjacent crane arm of two joints.Behind trouble removal, then unscrew screw rod 1, still make screw rod 1 head be in the position that does not influence arm pin 2 ' normal operation.
Adopt the arm pin of this kind version; When needs are tightened screw rod 1 ' head and forced arm pin 2 ' withdrawal or when unscrewing screw rod 1 ' head arm pin 2 ' normally being stretched out, because the elastic force of spring 3 ' is generally all bigger, thereby the friction force between the stage portion of screw rod 1 head and arm pin 2 ' stepped hole is also bigger; The resistance that adds the screw thread pair of upper pin 4 ' and screw rod 1 ' simultaneously; Then need sizable moment ability turn screw rod 1 ', the hexagon-head of screw rod 1 ' promptly is damaged after twisting several times easily like this, and screw rod 1 ' head becomes circle and can't re-use; Reduce the service life of screw rod 1 ', thereby influenced the work efficiency of hoisting crane.
The utility model content
The construction machinery and equipment that the utility model is intended to propose a kind of arm latch structure and has this arm latch structure needs big moment to turn screw head, the problem that causes screw head to damage easily with the arm latch structure that solves prior art.
An aspect according to the utility model provides a kind of arm latch structure, comprising: the arm pin, and arm pin first end offers stepped hole vertically, and arm pin middle part offers the chute that extends vertically; Adjusting screw(rod) is set in the stepped hole, comprises screw head and thread rod part, and thread rod part penetrates in the chute; Between the screw head of adjusting screw(rod) and the stage portion of stepped hole rolling structure is installed.
Further, rolling structure is the thrust baring that is set on the thread rod part.
Further, thrust baring comprises: blowout patche; Lasso; The retainer that has rolling body is arranged between blowout patche and the lasso; Blowout patche is set on the thread rod part, and lasso is mounted on the stage portion.
Further, lasso is embedded to stage portion.
Further, this arm latch structure also comprises: supporting seat, have mounting hole, and the arm guide is located in the mounting hole; Elastic body is set on the arm pin, and two ends are spacing by defining flange on the arm pin and supporting seat respectively; Bearing pin along radially being installed on the supporting seat of mounting hole, and cooperates with chute slidably; The thread rod part and the bearing pin of arm pin are spirally connected.
Further, second end of arm pin is offered porose vertically, and the hole communicates with chute, and thread rod part stretches in the hole and with jam nut and is spirally connected.
Further, second end of arm pin is connected with and is used for and driver train bonded assembly attaching parts, and arm pin and attaching parts are for removably connecting.
Further, second end of arm pin is provided with external thread section, and attaching parts is provided with the internal thread segment that cooperates with external thread section.
Another aspect according to the utility model also provides a kind of construction machinery and equipment, is provided with above-mentioned arm latch structure.
Further, this project machinery is hoisting crane, and hoisting crane comprises the more piece arm, and the supporting seat of arm latch structure is installed at least one joint arm.
Adopt the arm latch structure of the utility model; Owing to adopted the technical scheme that rolling structure is installed between the stage portion of the screw head of adjusting screw(rod) and stepped hole; Screw head forces arm pin withdrawal or when stretching out, under the effect of rolling structure, the friction force between screw head and the stage portion is a force of rolling friction when needs are tightened; Friction force has reduced the rotary resistance of screw head when reducing greatly; The required moment of turn screw rod is also comparable to be reduced originally greatly, thereby had reduced the wear damage and the distortion of screw head, had reached the effect that improves screw rod life-span and cost-cutting.And with respect to prior art, the utility model is more prone to realize through the turn screw rod axial shrinkage and the elongation of arm pin, and then has improved operating efficiency.
Description of drawings
The accompanying drawing that constitutes the part of the utility model is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 has schematically shown the main TV structure of the arm latch structure of the utility model;
Fig. 2 has schematically shown the plan structure section-drawing of the arm latch structure of the utility model; And
Fig. 3 has schematically shown the plan structure section-drawing of the arm latch structure of prior art.
The specific embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the utility model.
Referring to Fig. 1 and Fig. 2, show the structure of a kind of arm latch structure that the utility model provides, this arm latch structure comprises: adjusting screw(rod) 1, arm pin 2, elastic body 3, bearing pin 4, supporting seat 6 and rolling structure 8 etc.
As shown in the figure, supporting seat 6 has mounting hole 61, and arm pin 2 is set in the mounting hole 61.First end of arm pin 2 offers stepped hole 21 vertically, and arm pin 2 middle parts offer the chute 23 that extends vertically, and stepped hole 21 communicates with chute 23.Bearing pin 4 radially is installed in the pin shaft hole on the supporting seat 6 along mounting hole 61, and by finding out among Fig. 2, bearing pin 4 cooperates with chute 23 through chute 23 slidably.
Adjusting screw(rod) 1 is set in the stepped hole 21, and adjusting screw(rod) 1 comprises screw head 11 and thread rod part 13.Understand easily, stepped hole 21 has bigger heavy caliber hole section of bore and the less small-diameter hole section of bore, and the intersection of heavy caliber hole section and small-diameter hole section forms a stage portion 25.Screw head 11 is in the heavy caliber hole section of stepped hole 21, and thread rod part 13 passes to penetrate in the chute 23 and with bearing pin 4 after the small-diameter hole section of stepped hole 21 and is spirally connected.
The elastic body 3 general springs that adopt are set on the arm pin 2, to obtain lower manufacturing cost.The two ends of elastic body 3 are spacing by defining flange on the arm pin and spring perch respectively.
Rolling structure 8 is installed between the stage portion 25 of screw head 11 and stepped hole 21 of adjusting screw(rod) 1; So that compressing, screw head 11 and stage portion 25 contact and screw head 11 need be rotated further the time; The friction force that produces between screw head 11 and the stage portion 25 is a force of rolling friction; So just reduced the rotary resistance of screw head 11 greatly; Turn adjusting screw(rod) 1 required moment is also comparable to be reduced originally greatly, thereby had reduced the wear damage and the distortion of screw head 11, had reached the effect that improves the adjusting screw(rod) life-span.And with respect to prior art, the utility model is more prone to realize through the turn screw rod axial shrinkage and the elongation of arm pin, and then has improved operating efficiency.
In a kind of unshowned embodiment, rolling structure 8 for example is a thrust baring, and through thrust baring being set on the thread rod part 13, can make the friction force between screw head 11 and the stage portion 25 simply and effectively is force of sliding friction.Understand easily; Thrust baring improper spacing to stage portion 25 when avoiding the arm pin normally flexible; Generally speaking; The diameter of bore that thrust baring is set on the thread rod part 13 needs the diameter greater than thread rod part 13 places that cooperate with this endoporus, makes that thrust baring can be along the axial free activity of thread rod part 13.
Preferably, above-mentioned thrust baring comprises blowout patche, lasso, and be arranged on the retainer that has rolling body between blowout patche and the lasso.Blowout patche is set on the thread rod part 13, and lasso is mounted on the stage portion 25, and promptly thrust baring is fixedly installed on stage portion 25 places, with the collision noise of avoiding the free activity of thrust baring to cause.Understand easily, when thrust baring is fixedly installed to stage portion 25 places, the resistance when reducing to turn adjusting screw(rod) 1, the diameter of bore of blowout patche needs the diameter greater than thread rod part 13 places that cooperate with this endoporus equally.Preferably, can lasso be embedded to stage portion 25, this mounting means is more convenient.
By it can also be seen that among Fig. 2; It is porose 27 that second end of arm pin 2 is offered vertically, and hole 27 communicates with chute 23, and thread rod part 13 stretches in the hole 27 and with jam nut 5 and is spirally connected; 27 are formed with chute 23 adjacents and are used for the limited step spacing to jam nut 5 in the hole; Like this, so that when stretching out, can preventing adjusting screw(rod) 1, arm pin 2 breaks away from the matching relationship with bearing pin 4 when unscrewing adjusting screw(rod) 1.
Come with reference to figure 2, preferably, second end of arm pin 2 is connected with and is used for and driver train bonded assembly attaching parts 7 again, and arm pin 2 and attaching parts 7 are for removably connecting, and driver train is generally the arm pin inserting mechanism, and the arm pin inserting mechanism is for example by hydraulic-driven.Certainly, driver train also can be other forms of driver train, as long as can reach the effect of impelling arm pin 2 to shrink to arm pin 2 application of forces.Preferably, second end of arm pin 2 is provided with external thread section, and attaching parts 7 is provided with the internal thread segment that cooperates with external thread section, and arm pin 2 is spirally connected with attaching parts 7, and is simple in structure like this, is convenient to dismounting and replacing.
The utility model also provides a kind of construction machinery and equipment, and this project machinery is provided with above-mentioned arm latch structure.Preferably, this project machinery is hoisting crane, and hoisting crane comprises the more piece arm, and the supporting seat of arm latch structure is installed at least one joint arm, and the arm pin-and-hole that matches with the arm pin of arm latch structure is arranged on the arm adjacent with this arm.Certainly, can also save the arm latch structure that is provided with the utility model on the arm at each.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (10)
1. arm latch structure comprises:
Arm pin (2), said arm pin (2) first ends offer stepped hole (21) vertically, and said arm pin (2) middle part offers the chute (23) that extends vertically;
Adjusting screw(rod) (1) is set in the said stepped hole (21); Said adjusting screw(rod) comprises screw head (11) and thread rod part (13), and said thread rod part (13) penetrates in the said chute (23);
It is characterized in that,
Between the screw head (11) of said adjusting screw(rod) (1) and the stage portion (25) of said stepped hole (21) rolling structure (8) is installed.
2. arm latch structure according to claim 1 is characterized in that, said rolling structure (8) is for being set in the thrust baring on the said thread rod part (13).
3. arm latch structure according to claim 2 is characterized in that said thrust baring comprises: blowout patche; Lasso; The retainer that has rolling body is arranged between said blowout patche and the said lasso; Said blowout patche is set on the said thread rod part (13), and said lasso is mounted on the said stage portion (25).
4. arm latch structure according to claim 3 is characterized in that, said lasso is embedded to said stage portion (25).
5. according to each described arm latch structure in the claim 1 to 4, it is characterized in that, also comprise:
Supporting seat (6) has mounting hole (61), and said arm pin (2) is set in the said mounting hole (61);
Elastic body (3) is set on the said arm pin (2), and two ends are spacing by defining flange on the said arm pin (2) and said supporting seat (6) respectively;
Bearing pin (4) along radially being installed on the said supporting seat (6) of said mounting hole (61), and cooperates with said chute (23) slidably; The thread rod part (13) of said arm pin (2) is spirally connected with said bearing pin (4).
6. arm latch structure according to claim 5; It is characterized in that; Second end of said arm pin (2) is offered porose (27) vertically, and said hole (27) communicate with said chute (23), and said thread rod part (13) stretches in the said hole (27) and with jam nut (5) and is spirally connected.
7. arm latch structure according to claim 5 is characterized in that, second end of said arm pin (2) is connected with and is used for and driver train bonded assembly attaching parts (7), and said arm pin (2) and said attaching parts (7) are for removably connecting.
8. arm latch structure according to claim 7 is characterized in that, second end of said arm pin (2) is provided with external thread section, and said attaching parts (7) is provided with the internal thread segment that cooperates with said external thread section.
9. a construction machinery and equipment is characterized in that, is provided with each described arm latch structure in the claim 1 to 8.
10. construction machinery and equipment according to claim 9 is characterized in that, said construction machinery and equipment is a hoisting crane, and said hoisting crane comprises the more piece arm, and the supporting seat of said arm latch structure is installed on the said arm of at least one joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202997543U CN202226573U (en) | 2011-08-17 | 2011-08-17 | Arm pin structure and construction machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202997543U CN202226573U (en) | 2011-08-17 | 2011-08-17 | Arm pin structure and construction machine with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202226573U true CN202226573U (en) | 2012-05-23 |
Family
ID=46077172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202997543U Expired - Fee Related CN202226573U (en) | 2011-08-17 | 2011-08-17 | Arm pin structure and construction machine with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202226573U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016496A (en) * | 2012-12-19 | 2013-04-03 | 中联重科股份有限公司 | Threaded connection structure, pin pulling device and suspension arm |
-
2011
- 2011-08-17 CN CN2011202997543U patent/CN202226573U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016496A (en) * | 2012-12-19 | 2013-04-03 | 中联重科股份有限公司 | Threaded connection structure, pin pulling device and suspension arm |
| CN103016496B (en) * | 2012-12-19 | 2015-02-11 | 中联重科股份有限公司 | Threaded connection structure, pin pulling device and suspension arm |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100535478C (en) | A linear actuator | |
| CN201900620U (en) | Oscillating bearing dismantling and installing tool | |
| DE102007031437A1 (en) | Rear and / or front axle subframe bearing and method for mounting a rear and / or front axle subframe bearing | |
| EP3434934B1 (en) | Spindle drive device | |
| CN202226573U (en) | Arm pin structure and construction machine with same | |
| CN204004018U (en) | A kind of adapter sleeve hydraulic pressure mounting assembly | |
| CN102537209A (en) | Wire rope locking positioning device and method | |
| US20150314430A1 (en) | Steering shock compressor systems and methods | |
| CN201500873U (en) | Turbocharger check ring installer | |
| CN103121613B (en) | For the Steel wire tensile force equalizer of lift car | |
| CN100343147C (en) | Bobbin holder | |
| DE102009013808A1 (en) | Apparatus and method for attaching and detaching a disc brake rotor to and from a wheel hub | |
| CN211517277U (en) | Special decomposition clamp for embedded lubricating oil short pipe of engine | |
| CN204533107U (en) | Easily detachable expansion bolt | |
| CN105239948B (en) | Release device and injection device for coiled tubing with the release device | |
| CN104595315A (en) | Easy-to-disassemble expansion bolt | |
| CN110848130A (en) | Novel high-strength large pump common disconnecting-connecting device | |
| EP1637751B1 (en) | ball joint for motor vehicle | |
| CN103470678A (en) | Shock absorber | |
| CN218177804U (en) | Low-noise automobile steel plate spring | |
| CN205744815U (en) | A kind of Novel bolt | |
| CN105972054A (en) | compressor crankshaft and compressor | |
| CN215567755U (en) | Noise reduction gear capable of quickly mounting shaft sleeve | |
| CN111364935A (en) | Oil pumping equipment and oil pumping rod group under-pressure operation method | |
| CN103303820A (en) | Retractable arm type crane and arm pin device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120523 Termination date: 20170817 |