CN110422777B - Telescopic boom and engineering machinery - Google Patents
Telescopic boom and engineering machinery Download PDFInfo
- Publication number
- CN110422777B CN110422777B CN201910663671.9A CN201910663671A CN110422777B CN 110422777 B CN110422777 B CN 110422777B CN 201910663671 A CN201910663671 A CN 201910663671A CN 110422777 B CN110422777 B CN 110422777B
- Authority
- CN
- China
- Prior art keywords
- hole
- piece
- telescopic
- telescopic driving
- section
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention provides a telescopic arm and engineering machinery, and relates to the technical field of hoisting, wherein the telescopic arm comprises a shell, a telescopic driving piece fixedly arranged in the shell, a connecting piece used for connecting the shell and the telescopic driving piece, and a pipe sleeve piece; the tail part of the shell is provided with a through hole, the end part of the telescopic driving piece is provided with a threaded hole opposite to the through hole, the pipe sleeve piece is arranged in the through hole in a penetrating way, the connecting piece is inserted in the pipe sleeve piece and is screwed in the threaded hole, and the pipe sleeve piece is tightly propped against the telescopic driving piece by the connecting piece; an adjusting gap exists between the pipe sleeve and the through hole, and the pipe sleeve can move in the through hole along the vertical direction by adjusting the gap. The technical effect that the connecting piece for connecting the telescopic driving piece and the shell is not loose is achieved.
Description
Technical Field
The invention relates to the technical field of hoisting, in particular to a telescopic boom and engineering machinery.
Background
At present, the telescopic driving piece rod head and a section of arm tail in the single-cylinder bolt cargo boom of the automobile crane are fixed through four big bolts, but because of the welding error of the arm tail oil cylinder fixing frame, the contact surface with the oil cylinder head and the contact surface with the bolt are not parallel, and the problem of bolt looseness and falling is easily caused.
Therefore, it is an important technical problem to be solved by those skilled in the art to provide a telescopic arm and a construction machine, in which bolts are not loosened.
Disclosure of Invention
The invention aims to provide a telescopic arm and engineering machinery, which are used for relieving the technical problem that bolts used for a telescopic driving piece rod head and the telescopic arm in the prior art are easy to loosen.
In a first aspect, an embodiment of the present invention provides a telescopic boom, which includes a housing, a telescopic driving member fixed in the housing, and a connecting member for connecting the housing and the telescopic driving member, and the telescopic boom further includes a pipe kit;
the tail part of the shell is provided with a through hole, the end part of the telescopic driving piece is provided with a threaded hole opposite to the through hole, the pipe sleeve is arranged in the through hole in a penetrating way, the connecting piece is inserted in the pipe sleeve and is connected with the threaded hole in a rotating way, and the pipe sleeve is tightly propped against the telescopic driving piece by the connecting piece;
an adjusting gap exists between the pipe sleeve and the through hole, and the adjusting gap enables the pipe sleeve to move in the through hole along the vertical direction.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the tube kit includes a sleeve, the connecting member includes a connecting section and a limiting section, the sleeve is sleeved on the connecting section, and one end of the sleeve abuts against the telescopic driving member and the other end abuts against the limiting section.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the tube kit further includes an adjusting washer, the adjusting washer is sleeved on the connecting section and located between the limiting section and the sleeve, and the sleeve abuts against the telescopic driving member through the adjusting washer and the limiting section.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the connecting element includes a bolt, a thread section of the bolt forms the connecting section, and a nut section of the bolt forms the limiting section.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a flat washer is disposed between the nut segment and the adjusting washer.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a lock washer is disposed between the nut segment and the flat washer.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the number of the adjustment washers is multiple.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the number of the through holes is multiple, and the multiple through hole arrays are disposed on the housing; the number of the threaded holes is the same as that of the through holes, and the threaded holes are in one-to-one correspondence with the through holes respectively.
With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the through hole is a kidney-shaped hole, and a length direction of the kidney-shaped hole extends in a vertical direction.
In a second aspect, an embodiment of the present invention provides a telescopic arm, including a housing, a telescopic driving element disposed in the housing, and a connecting element for connecting the housing and the telescopic driving element;
the tail of the shell is provided with a through hole, the end part of the telescopic driving piece is provided with an expansion hole opposite to the through hole, the connecting piece penetrates through the through hole and is in interference connection with the expansion hole, one end of the connecting piece, far away from the telescopic driving piece, is provided with a limiting piece, the limiting piece is used for preventing the shell from being separated from the connecting piece, and the limiting piece and the shell are spaced;
an adjusting gap exists between the connecting piece and the through hole, and the connecting piece can move in the through hole along the vertical direction through the adjusting gap.
In a third aspect, an embodiment of the present invention provides a construction machine, including the telescopic arm.
Has the advantages that:
the invention provides a first telescopic arm, which comprises a shell, a telescopic driving piece fixedly arranged in the shell, and a connecting piece used for connecting the shell and the telescopic driving piece, wherein the telescopic arm also comprises a pipe sleeve piece; the tail part of the shell is provided with a through hole, the end part of the telescopic driving piece is provided with a threaded hole opposite to the through hole, the pipe sleeve piece is arranged in the through hole in a penetrating way, the connecting piece is inserted in the pipe sleeve piece and is screwed in the threaded hole, and the pipe sleeve piece is tightly propped against the telescopic driving piece by the connecting piece; an adjusting gap exists between the pipe sleeve and the through hole, and the pipe sleeve can move in the through hole along the vertical direction by adjusting the gap.
During connection, the pipe sleeve is sleeved on the connecting piece, then the connecting piece is inserted into the through hole, the connecting piece is screwed with the threaded hole in the end part of the telescopic driving piece, after the pipe sleeve is screwed, the pipe sleeve is tightly abutted against the end surface of the telescopic driving piece, the pipe sleeve provides pre-tightening force for threaded connection of the connecting piece and the telescopic driving piece, the connecting piece is self-locked on the telescopic driving piece, the connecting piece and the telescopic driving piece are relatively static, and a gap is reserved between the abutted end surface of the connecting piece and the pipe sleeve and the outer wall of the shell after the connecting piece and the telescopic driving piece are screwed; in the follow-up working process, when the telescopic driving piece warps, the connecting piece can swing up and down in the through hole along with the telescopic driving piece through the gap between the connecting piece and the shell and the adjusting gap between the through hole and the pipe sleeve piece, and the situation that the connecting piece is loosened and separated from the telescopic driving piece can be effectively reduced or even avoided.
According to the second telescopic arm provided by the invention, when the telescopic arm is connected, the pipe sleeve is sleeved on the connecting piece, then the connecting piece is inserted into the through hole, the connecting piece is inserted into the expansion hole at the end part of the telescopic driving piece, and after expansion, a gap is reserved between the limiting piece on the connecting piece, which is far away from the telescopic driving piece, and the outer wall of the shell; in the follow-up working process, when the telescopic driving piece warps, the connecting piece can swing up and down in the through hole along with the telescopic driving piece through the gap between the connecting piece and the shell and the adjusting gap between the through hole and the pipe sleeve piece, and the situation that the connecting piece is loosened and separated from the telescopic driving piece can be effectively reduced or even avoided.
The invention provides an engineering machine, which comprises a telescopic arm. The construction machine has the advantages compared with the prior art, and the details are not described here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic partial structural view of a telescopic boom according to an embodiment of the present invention;
FIG. 2 is a schematic view of a telescopic driving member in the telescopic arm according to an embodiment of the present invention;
FIG. 3 is a schematic view of the connection between the telescopic driving member and the housing in the telescopic arm according to the embodiment of the present invention;
FIG. 4 is an enlarged view taken at A in FIG. 3;
fig. 5 is a partial schematic view of a construction machine according to an embodiment of the present invention.
Icon:
100-a housing; 110-a via;
200-a telescopic driving member; 210-a threaded hole;
300-a connector; 310-a thread segment; 320-nut segment; 330-flat washer; 340-a lock washer;
400-a sleeve; 500-adjusting the washer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "length", "upper", "lower", "front", "rear", "vertical", and the like, indicate orientations or positional relationships based on those shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
Referring to fig. 1, 2, 3 and 4, the embodiment provides a telescopic arm, which includes a housing 100, a telescopic driving member 200 fixed in the housing 100, and a connecting member 300 for connecting the housing 100 and the telescopic driving member 200, and the telescopic arm further includes a pipe kit; the tail of the shell 100 is provided with a through hole 110, the end of the telescopic driving member 200 is provided with a threaded hole 210 opposite to the through hole 110, the tube kit is arranged in the through hole 110 in a penetrating way, the connecting member 300 is inserted in the tube kit and is screwed in the threaded hole 210, and the tube kit is tightly abutted to the telescopic driving member 200 by the connecting member 300; there is an adjustment gap between the tube set and the through hole 110, and the adjustment gap enables the tube set to move in the vertical direction within the through hole 110.
During connection, the pipe sleeve is sleeved on the connecting piece 300, then the connecting piece 300 is inserted into the through hole 110, the connecting piece 300 is screwed with the threaded hole 210 at the end part of the telescopic driving piece 200, after the pipe sleeve is screwed, the pipe sleeve is tightly abutted against the end surface of the telescopic driving piece 200, the pipe sleeve provides pre-tightening force for threaded connection of the connecting piece 300 and the telescopic driving piece 200, so that the connecting piece 300 is self-locked on the telescopic driving piece 200, the connecting piece 300 and the telescopic driving piece 200 are relatively static, and a gap is reserved between the end surface abutted against the pipe sleeve of the connecting piece 300 and the outer wall of the shell 100 after the connecting piece 300 and the telescopic driving piece 200; in the subsequent working process, when the telescopic driving member 200 is warped, the connecting member 300 can swing up and down in the through hole 110 along with the telescopic driving member 200 through the gap left between the connecting member 300 and the housing 100 and the adjusting gap between the through hole 110 and the pipe kit, so that the occurrence of the situation that the connecting member 300 is loosened and separated from the telescopic driving member 200 can be effectively reduced or even avoided.
Specifically, there is an adjustment gap between the tube kit and the through hole 110, and by adjusting the gap, the tube kit can move in the through hole 110 in the vertical direction. The pipe external member is established outside connecting piece 300, when the screw hole 210 on connecting piece 300 and the flexible driving piece 200 was screwed, connecting piece 300 can be with the tight butt of pipe external member on flexible driving piece 200 (when flexible driving piece 200 terminal surface and shell 100 lateral wall nonparallel, the pipe external member can incline certain angle at through-hole 110, thereby make the contact surface of connecting piece 300 and the contact surface of flexible driving piece 200 parallel), the pipe external member can be to connecting piece 300 application of force this moment, pretension connecting piece 300 and screw hole 210, and make the contact surface of connecting piece 300 be parallel with the contact surface of flexible driving piece 200, guarantee that connecting piece 300 can not take place to become flexible relative flexible driving piece 200.
And because the connector 300 is able to tightly abut the tube set against the telescopic driver 200, i.e. there is a gap between the connector 300 and the outer wall of the housing 100. With the extension of one of the telescopic arms, the center of gravity of the arm is moved forward, which causes the tail of the arm to tilt up, thereby raising the telescopic driving member 200 (the arm extending from the telescopic arm will press the telescopic driving member 200, and the end of the telescopic driving member 200 will also tilt up); the retractable driving member 200 drives the connecting member 300 to move up and down in the through hole 110, so that the pressure applied to the retractable driving member 200 is released, and the retractable driving member 200 is prevented from being held back.
The telescopic driving member 200 is a telescopic cylinder to ensure that the telescopic driving member 200 can drive different sections of the telescopic arm to extend and retract.
Referring to fig. 1, in an alternative of this embodiment, the tube kit includes a sleeve 400, the connecting member 300 includes a connecting section and a limiting section, the connecting section is sleeved with the sleeve 400, one end of the sleeve 400 abuts against the telescopic driving member 200, and the other end abuts against the limiting section.
Specifically, the tube kit includes a sleeve 400, and when assembled, the connection section of the connection member 300 is screwed to the threaded hole 210 of the telescopic driving member 200 through the sleeve 400, and the limit section of the connection member 300 abuts against the end of the sleeve 400. When the connecting section is screwed with the threaded hole 210, the sleeve 400 is tightly pressed on the telescopic driving piece 200 by the limiting section, and the reaction force is applied to the limiting section by the sleeve 400 at the moment, so that a large pre-tightening force is formed between the connecting section connected with the limiting section and the threaded hole 210, and the connecting stability of the connecting section and the threaded hole 210 is ensured.
Wherein, when the tube kit includes only the sleeve 400, the length of the sleeve 400 is greater than the depth of the through hole 110, so that a gap is formed between the limiting section of the connector 300 and the outer wall of the casing 100, so that the connector 300 can move relative to the through hole 110.
Referring to fig. 1, 3 and 4, in an alternative of this embodiment, the tube kit further includes an adjusting washer 500, the adjusting washer 500 is sleeved on the connecting section and located between the limiting section and the sleeve 400, wherein the sleeve 400 abuts against the telescopic driving member 200 through the adjusting washer 500 and the limiting section.
Specifically, the pipe kit still includes adjusting washer 500, through addding adjusting washer 500, can increase the distance between the spacing section of connecting piece 300 and the shell 100 outer wall, when flexible driving piece 200 atress was lifted, reduced the atress threshold value, avoided flexible driving piece 200 atress.
Wherein, adjusting washer 500 sets up between sleeve 400 and spacing section, not only can increase the length of pipe box spare through adjusting washer 500, can also avoid spacing section to cause too big wearing and tearing to sleeve 400, uses after a period, can change adjusting washer 500 and need not to change sleeve 400, reduces manufacturing cost.
Wherein, when the pipe kit includes the sleeve 400 and the adjustment washer 500, the sum of the lengths of both the sleeve 400 and the adjustment washer 500 is greater than the depth of the through hole 110, so that a gap is formed between the stopper section of the connection member 300 and the outer wall of the housing 100, so that the connection member 300 can move relative to the through hole 110.
Referring to fig. 1, 3 and 4, in an alternative to this embodiment, the connector 300 comprises a bolt, the threaded section 310 of which forms the connecting section, and the nut section 320 of which forms the stop section.
Specifically, the connecting member 300 is a bolt, the thread section 310 of the bolt is a connecting section of the connecting member 300, and the nut section 320 of the thread is a limiting section of the connecting member 300.
Referring to fig. 1, 3 and 4, in an alternative to this embodiment, a flat washer 330 is provided between the nut segment 320 and the adjustment washer 500.
Specifically, by arranging the flat washer 330, when the telescopic driving member 200 moves, the contact area between the nut segment 320 and the through hole 110 can be increased, and the nut segment 320 is prevented from damaging the through hole 110. Moreover, the flat washer 330 can increase the contact area between the nut segment 320 and the adjusting washer 500, so as to prevent the nut segment 320 from passing through the adjusting washer 500 (i.e., the adjusting washer 500 is pulled out of the nut segment 320) due to the excessive pre-tightening force.
Referring to fig. 1, 3 and 4, in an alternative to this embodiment, a lock washer 340 is provided between the nut segment 320 and the flat washer 330.
Specifically, through the setting of loosening the packing ring, bolted connection's pretightning force can further be improved.
In an alternative of this embodiment, the number of the adjustment washers 500 is plural.
Specifically, the number of the adjustment washers 500 may be adjusted according to the depth of the through-hole 110 so that the nut segment 320 of the bolt can form a gap with the outer wall of the housing 100.
Referring to fig. 1 and 2, in an alternative of the present embodiment, the number of the through holes 110 is plural, and a plurality of through holes 110 are arranged in an array on the housing 100; the number of the threaded holes 210 is the same as the number of the through holes 110, and the plurality of threaded holes 210 correspond to the plurality of through holes 110 one to one.
Specifically, the housing 100 is provided with a plurality of through holes 110 in an array, the telescopic driving member 200 is provided with a plurality of threaded holes 210, and the through holes 110 correspond to the threaded holes 210 one to one. The telescopic driving member 200 and the housing 100 are fixed by the plurality of sets of through holes 110 and threaded holes 210, and the stability of connection is improved. In this embodiment, the through holes 110 are arranged in a rectangular array on the housing 100.
Referring to fig. 1, in an alternative of the present embodiment, the through-hole 110 is a kidney-shaped hole, and a length direction of the kidney-shaped hole extends in a vertical direction.
Specifically, the through hole 110 is a kidney-shaped hole, and the extending direction of the kidney-shaped hole is a vertical direction. When one section of the telescopic arm extends, the center of gravity of the section of the arm is moved forwards, so that the tail part of the section of the arm is tilted upwards, and the telescopic driving piece 200 is lifted; since the direction of the gravity center acting force is the vertical direction, the raising manner of the telescopic driving member 200 is also the vertical direction, and thus the extending direction of the kidney-shaped hole is set to the vertical direction.
In addition, the through hole 110 may be a circular hole with a diameter larger than that of the threaded section 310.
Referring to fig. 1, 2, 3 and 4, the present embodiment provides a telescopic arm including a housing 100, a telescopic driving member 200 disposed in the housing 100, and a connecting member 300 for connecting the housing 100 and the telescopic driving member 200; the tail of the housing 100 is provided with a through hole 110, the end of the telescopic driving member 200 is provided with an expansion hole opposite to the through hole 110, the connecting member 300 is arranged through the through hole 110 and is in interference connection with the expansion hole, one end of the connecting member 300 far away from the telescopic driving member 200 is provided with a limiting member, the limiting member is used for preventing the housing 100 from being separated from the connecting member 300, and the limiting member is spaced from the housing 100; there is an adjustment gap between the connection member 300 and the through-hole 110, and the adjustment gap enables the connection member 300 to move in the vertical direction within the through-hole 110.
During connection, the pipe sleeve is sleeved on the connecting piece 300, then the connecting piece 300 is inserted into the through hole 110, the connecting piece 300 is inserted into the expansion hole at the end part of the telescopic driving piece 200, and after expansion, a gap is reserved between a limiting piece on the connecting piece 300, which is far away from the telescopic driving piece 200, and the outer wall of the shell 100; in the subsequent working process, when the telescopic driving member 200 is warped, the connecting member 300 can swing up and down in the through hole 110 along with the telescopic driving member 200 through the gap left between the connecting member 300 and the housing 100 and the adjusting gap between the through hole 110 and the pipe kit, so that the occurrence of the situation that the connecting member 300 is loosened and separated from the telescopic driving member 200 can be effectively reduced or even avoided.
Referring to fig. 5, the present embodiment provides a construction machine including a telescopic arm. The construction machine has the advantages compared with the prior art, and the details are not described here.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A telescopic arm comprising: the telescopic arm comprises a shell (100), a telescopic driving piece (200) fixedly arranged in the shell (100) and a connecting piece (300) used for connecting the shell (100) and the telescopic driving piece (200), and is characterized by further comprising a pipe sleeve;
the tail of the shell (100) is provided with a through hole (110), the end part of the telescopic driving piece (200) is provided with a threaded hole (210) opposite to the through hole (110), the pipe sleeve is arranged in the through hole (110) in a penetrating manner, the connecting piece (300) is inserted in the pipe sleeve and is screwed in the threaded hole (210), and the pipe sleeve is tightly abutted to the telescopic driving piece (200) by the connecting piece (300);
an adjustment gap exists between the tube kit and the through hole (110), and the adjustment gap enables the tube kit to move in the vertical direction in the through hole (110);
the through hole (110) is a waist-shaped hole, and the length direction of the waist-shaped hole extends along the vertical direction.
2. The telescopic arm according to claim 1, wherein the tube kit comprises a sleeve (400), the connecting member (300) comprises a connecting section and a limiting section, the sleeve (400) is sleeved on the connecting section, one end of the sleeve (400) is abutted with the telescopic driving member (200), and the other end of the sleeve is abutted with the limiting section.
3. The telescopic arm according to claim 2, further comprising an adjusting washer (500), wherein the adjusting washer (500) is sleeved on the connecting section and located between the limiting section and the sleeve (400), and wherein the sleeve (400) abuts against the telescopic driving member through the adjusting washer (500) and the limiting section.
4. A telescopic arm according to claim 3, characterized in that the connection (300) comprises a bolt, the threaded section (310) of which forms the connection section and the nut section (320) of which forms the stop section.
5. Telescopic arm according to claim 4, wherein a flat washer (330) is arranged between the nut segment (320) and the adjusting washer (500).
6. A telescopic arm according to claim 5, characterized in that a lock washer (340) is arranged between the nut segment (320) and the flat washer (330).
7. A telescopic arm according to any of claims 3-5, characterized in that the number of said adjustment washers (500) is multiple.
8. The telescopic arm according to any of claims 1 to 5, wherein said through holes (110) are plural in number and a plurality of said through holes (110) are arranged in an array on said housing (100); the number of the threaded holes (210) is the same as that of the through holes (110), and the threaded holes (210) are in one-to-one correspondence with the through holes (110).
9. A telescopic arm comprising: a housing (100), a telescopic drive member (200) arranged within the housing (100), and a connection member (300) for connecting the housing (100) with the telescopic drive member (200), characterized in that,
a through hole (110) is formed in the tail of the shell (100), an expansion hole opposite to the through hole (110) is formed in the end of the telescopic driving piece (200), the connecting piece (300) penetrates through the through hole (110) and is in interference connection with the expansion hole, a limiting piece is arranged at one end, away from the telescopic driving piece (200), of the connecting piece (300), the limiting piece is used for preventing the shell (100) from being separated from the connecting piece (300), and the limiting piece is spaced from the shell (100);
an adjustment gap exists between the connecting piece (300) and the through hole (110), and the adjustment gap enables the connecting piece (300) to move in the through hole (110) along the vertical direction.
10. A working machine, characterized in that it comprises a telescopic arm according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663671.9A CN110422777B (en) | 2019-07-22 | 2019-07-22 | Telescopic boom and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663671.9A CN110422777B (en) | 2019-07-22 | 2019-07-22 | Telescopic boom and engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110422777A CN110422777A (en) | 2019-11-08 |
| CN110422777B true CN110422777B (en) | 2021-01-08 |
Family
ID=68411795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910663671.9A Active CN110422777B (en) | 2019-07-22 | 2019-07-22 | Telescopic boom and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110422777B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4098172A (en) * | 1975-11-12 | 1978-07-04 | Walter Kidde & Company, Inc. | Hydraulic cylinder rod end fixity connector for telescopic crane booms |
| SE9301338L (en) * | 1993-04-22 | 1994-05-09 | Hiab Ab | Device for extendable crane arms |
| CN203593559U (en) * | 2013-11-21 | 2014-05-14 | 徐州徐工随车起重机有限公司 | Telescopic arm floating type flanged connection structure |
| CN105179374B (en) * | 2014-11-28 | 2017-06-20 | 徐州重型机械有限公司 | Single-cylinder bolt device, cylinder head assembly and crane |
| US10183847B2 (en) * | 2015-03-31 | 2019-01-22 | Manitowoc Crane Companies, Llc | Cylinder retention device |
-
2019
- 2019-07-22 CN CN201910663671.9A patent/CN110422777B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110422777A (en) | 2019-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| BR112016028259B1 (en) | LOCKING DEVICE FOR FIXING A WEAR PART TO A SUPPORT FOR EXCAVATORS AND SIMILAR MACHINES, PROCESS FOR FIXING A WEAR PART TO A SUPPORT WITH A LOCKING DEVICE AND WEAR SYSTEM | |
| CN103703190B (en) | Engineering machinery | |
| CN110422777B (en) | Telescopic boom and engineering machinery | |
| US20090084454A1 (en) | Apparatus for fixing hydraulic pipes for zero tail swing excavator | |
| CN216690468U (en) | Reinforced structure of communication single-pipe tower | |
| CN210637345U (en) | Screw rod structure of mining machinery | |
| CN218894651U (en) | Shield machine and shield body hinged oil cylinder protection device | |
| CN210134466U (en) | Quick connector for excavator with simple structure | |
| CN218882185U (en) | Anti-toppling device for hydraulic support | |
| WO2022267935A1 (en) | Plugging pin connection assembly, crane boom, and crane | |
| CN214699620U (en) | Pipeline stabilizing device with functional parts | |
| CN219863010U (en) | Excavator bucket rod rear axle seat with adjustable length | |
| JP6075119B2 (en) | Construction machine grounding structure | |
| US9689142B2 (en) | Radial pattern mechanically adjustable blade pitch mount | |
| CN210101886U (en) | Electric motorcycle frame positioning device and electric motorcycle frame | |
| CN211813143U (en) | Anti-shifting jackscrew device of tower crane and tower crane | |
| CN214657314U (en) | Excavator machinery movable arm root hydraulic line protection architecture | |
| CN210218357U (en) | Connecting device and vehicle | |
| CN217778744U (en) | Front longitudinal beam structure and vehicle thereof | |
| CN218695560U (en) | Bracket welding device | |
| JP6233364B2 (en) | Telescopic beam and fixing member for cylinder device | |
| CN216331277U (en) | Mining dump truck | |
| CN213625753U (en) | Working device of skid steer loader and skid steer loader | |
| CN209002334U (en) | Convenient for fixed pontoon and with the working in paddy field of the pontoon | |
| CN218624101U (en) | Steady pole mechanism and raise boring machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |