CN215479350U - Telescopic boom and engineering machinery - Google Patents

Abstract

The utility model provides a telescopic arm and engineering machinery, and belongs to the technical field of engineering machinery. The telescopic boom comprises an outer boom and an inner boom positioned in the outer boom, and further comprises a slider base, a gasket and a slider, wherein the side wall of the boom tail structure of the inner boom is provided with a plurality of at least one placing groove, when the placing grooves comprise a plurality of placing grooves, the plurality of placing grooves are circumferentially arranged, the placing grooves are provided with a first opening towards the inner wall of the outer boom, the tail end of the boom tail structure is provided with a second opening, the second opening is communicated with the placing grooves, the slider base is of a box body structure with a top end opening and a side end opening, the top end opening corresponds to the first opening, the side end opening corresponds to the second opening, at least one gasket and the slider are suitable for being sequentially stacked in the slider base, the slider is suitable for at least partially extending out the top end opening, the gasket is suitable for passing in and out the slider base from the side end opening to reach the increase and decrease of the gasket, and further realizes the gap adjustment between the slider and the inner wall of the outer boom.

Description

Telescopic boom and engineering machinery

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to a telescopic arm and engineering machinery.

Background

Telescopic booms are common structures in mechanical equipment, such as a boom telescopic structure, in which an inner knuckle boom is nested in a cavity inside an outer knuckle boom, and two knuckle booms can slide relative to each other to realize telescopic length change. The telescopic structure of the suspension arm is widely applied to various engineering machines, such as cranes and the like. In order to avoid the relatively large friction between the surfaces of the two sections of arms during the sliding process, a sliding block is usually arranged between the wall surfaces of the two sections of arms.

As shown in fig. 1 and fig. 2, fig. 1 is a schematic cross-sectional view of a boom telescopic structure in the prior art, and fig. 2 is an enlarged view of a position a in fig. 1, when the boom telescopic structure is assembled, it is necessary to fix a slider 3 to a side wall of an arm tail structure 1 of an inner arm, and to press a gasket 4 between the slider 3 and the side wall of the arm tail structure 1, and both the slider 3 and the gasket 4 are clamped between a vertical plate 11 at a front end and a vertical plate 11 at a rear end of the arm tail structure 1, and then the two arms are assembled together. Because the slider 3 and the arm tail structure 1 of 4 both sides of gasket are relatively fixed, and gasket 4 is blocked again between front end riser 11 and rear end riser 11, lead to operating personnel can't dismantle gasket 4 in outer festival arm 6 with the clearance of adjusting slider 3 and the 6 inner walls of outer festival arm.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the gap between a sliding block and an outer knuckle arm in the traditional suspension arm telescopic structure is difficult to adjust.

In order to solve the above problems, the present invention provides a telescopic boom, which comprises an outer arm and an inner arm located in the outer arm, and further comprises a slider base, a spacer and a slider, wherein the side wall of the arm tail structure of the inner arm is provided with at least one placement groove, when the placement groove comprises a plurality of placement grooves, the plurality of placement grooves are circumferentially arranged, the placement groove is provided with a first opening towards the inner wall of the outer arm, the tail end of the arm tail structure is provided with a second opening, the second opening is communicated with the placement groove, the slider base is a box structure with a top end opening and a side end opening, the top end opening is arranged corresponding to the first opening, the side end opening is arranged corresponding to the second opening, at least one spacer and the slider are suitable for being sequentially stacked in the slider base, and the slider is suitable for at least partially extending out of the top end opening, the gasket is suitable for entering and exiting the sliding block base from the side end opening.

Compared with the prior art, the telescopic arm provided by the utility model has the following beneficial effects that:

when carrying out initial assembly to flexible arm, according to the lateral wall of the arm tail structure of interior section arm and the clearance between the outer section arm inner wall, can place a plurality of gaskets and the slider that need the assembly in the slider base from the top opening in proper order (the gasket also can be put into the slider base from the side opening), then place the slider base in the standing groove to make top opening and first uncovered correspondence, the side opening corresponds with the second is uncovered, then with interior section arm assembly to outer section arm in. When the clearance of slider to outer festival arm inner wall needs to be adjusted, earlier through removing the position of interior festival arm in outer festival arm so that arm tail structure removes the place ahead of access hole, operating personnel can get into in the outer festival arm and be located the rear of arm tail structure from the access hole of outer festival arm, also be the direction of tail end, then the gasket that lies in arm tail structure rear side in the slider base pulls out backward in the slider base, or increase the gasket in the slider base from the side opening part that lies in arm tail structure rear side in the slider base to the slider base, with this increase and decrease that realizes the gasket, and then realize the clearance adjustment of slider and outer festival arm inner wall.

Further, the telescopic arm further comprises a positioning mechanism, and the positioning mechanism is arranged on the arm tail structure and is used for limiting the movement of the sliding block base and/or the gasket in the placing groove.

Further, the positioning mechanism comprises a fastener adapted to fix the slider base in the placement slot.

Further, the positioning mechanism comprises a blocking piece, and the blocking piece is arranged on the arm tail structure and located at the second opening.

Furthermore, the two blocking pieces are respectively arranged at two ends of the second opening, the blocking pieces are suitable for preventing the sliding block base from falling off from the second opening to the tail end direction of the arm tail structure, and the interval between the two blocking pieces is larger than or equal to the length of the side end opening.

Furthermore, a top hole is formed in the bottom of the placing groove.

Further, telescopic boom still includes gasket fixed establishment, gasket fixed establishment is used for fixing the gasket is in order to prevent the gasket from following side end opening part drops.

Further, the gasket fixing mechanism comprises a second threaded connecting piece, a first through hole is formed in the bottom of the placing groove, a second through hole is formed in the bottom wall of the slider base, a third through hole is formed in the gasket, a fourth through hole is formed in the slider, the second threaded connecting piece is suitable for sequentially penetrating the first through hole, the second through hole and the third through hole and then penetrating the fourth through hole, and the first through hole and/or the second through hole are/is threaded holes.

Further, the gasket fixing mechanism comprises a first threaded connector and a protruding strip, the protruding strip is arranged on one side of the slider base and located between the top end opening and the side end opening, and the first threaded connector is suitable for being in threaded connection with the protruding strip to prevent the gasket from moving out of the slider base from the side end opening.

In addition, the utility model also provides engineering machinery, and the engineering machinery comprises the telescopic arm.

Since the technical improvement and the technical effect of the construction machine are the same as those of the telescopic arm, the technical effect of the construction machine will not be described in detail.

Drawings

FIG. 1 is a schematic cross-sectional view of a boom extension structure in the prior art;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of a telescopic arm according to an embodiment of the present invention;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a partial schematic structural view of the arm tail structure of the embodiment of the present invention, in which a placement groove is formed on the top of the sidewall;

FIG. 6 is a rear view of a slider base with a slider and shim attached in accordance with an embodiment of the present invention;

FIG. 7 is a side view of a slider base with a slider and shim attached in accordance with an embodiment of the present invention;

fig. 8 is a rear view of the slider base with the slider and shim attached thereon in accordance with an embodiment of the present invention in combination with a placement groove.

Description of reference numerals:

1-arm tail structure, 11-vertical plate, 16-placing groove, 161-first opening, 162-second opening, 17-blocking piece, 18-first through hole, 19-ejecting hole, 2-sliding block base, 21-side end opening, 22-top end opening, 3-sliding block, 4-gasket, 5-second threaded connecting piece, 6-external joint arm, 7-protruding strip and 8-first threaded connecting piece.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Also, in the drawings, the Z-axis represents a vertical, i.e., up-down position, and a positive direction of the Z-axis (i.e., an arrow direction of the Z-axis) represents up, and a negative direction of the Z-axis (i.e., a direction opposite to the positive direction of the Z-axis) represents down; in the drawings, the X-axis represents the longitudinal direction, i.e., the front-rear position, and the positive direction of the X-axis (i.e., the arrow direction of the X-axis) represents the front and the negative direction of the X-axis (i.e., the direction opposite to the positive direction of the X-axis) represents the rear; in the drawings, the Y-axis represents the lateral, i.e., left-right, position, and the positive direction of the Y-axis (i.e., the arrow direction of the Y-axis) represents the left, and the negative direction of the Y-axis (i.e., the direction opposite to the positive direction of the Y-axis) represents the right.

It should also be noted that the foregoing Z-axis representation is meant only to facilitate description of the utility model and to simplify description, and is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the utility model.

In the telescopic arm, the inner arm is arranged in the outer arm and moves along the length direction of the outer arm, the gap between the inner arm and the outer arm is the gap between the outer wall of the inner arm and the inner wall of the outer arm, and one of the main functions of the sliding block is to avoid the large surface relative friction of the two arms in the relative sliding process. However, because the welding seams at the two ends of the outer knuckle arm and the inner knuckle arm in the telescopic arm are concentrated, in actual production, the size of the port part of the knuckle arm is often smaller than the size of the middle of the knuckle arm, or the gap between the position of the inner knuckle arm where the sliding block is installed and the outer knuckle arm can change along with relative sliding due to some tolerance reasons. If the clearance becomes smaller, the function of the sliding block can be disabled, if the clearance is too large, the sliding block is assembled too tightly, and the telescopic shaking of the telescopic arm can be caused. In order to solve the problems, the whole inner arm is required to be disassembled and reassembled, and the workload is huge.

Referring to fig. 3-8, the telescopic boom according to the embodiment of the present invention includes an outer joint boom 6 and an inner joint boom located in the outer joint boom 6, and further includes a slider base 2, a gasket 4 and a slider 3, a side wall of an arm tail structure 1 of the inner joint boom is provided with at least one placement groove 16, when the placement groove 16 includes a plurality of placement grooves 16, the plurality of placement grooves 16 are circumferentially arranged, the placement groove 16 is provided with a first opening 161 facing an inner wall of the outer joint boom 6, a tail end of the arm tail structure 1 is provided with a second opening 162, the second opening 162 is communicated with the placement groove 16, the slider base 2 is a box structure having a top end opening 22 and a side end opening 21, the top end opening 22 is arranged corresponding to the first opening 161, the side end opening 21 is arranged corresponding to the second opening 162, at least one gasket 4 and one slider 3 are adapted to be sequentially stacked in the slider base 2, and the sliding block 3 is suitable for at least partially extending out of the top end opening 22, and the gasket 4 is suitable for entering and exiting the sliding block base 2 from the side end opening 21.

The telescopic boom may be a boom of a construction machine such as a crane.

It should be noted that the arm tail structure 1 shown in fig. 5 is a partial view in this embodiment, and the placement groove in fig. 5 is opened at the top of the side wall (the side wall is a peripheral surface and is an outer ring surface of the arm tail structure 1) of the arm tail structure 1, but may be opened at other positions of the side wall of the arm tail structure, and this embodiment is described as a single placement groove opened at the top of the side wall of the arm tail structure.

In this embodiment, when carrying out initial assembly to flexible arm, according to the clearance between interior section arm and the outer section arm 6, can place a plurality of gaskets 4 and the slider 3 that need the assembly in slider base 2 from the top end opening in proper order (the gasket also can be put into slider base from the side end opening), then place slider base 2 in standing groove 16, and make the top end opening correspond with first uncovered, side end opening (slider base's rear end) corresponds with the second uncovered, then assemble interior section arm to outer section arm 6 in. When the gap between the slider 3 and the inner wall of the outer arm needs to be adjusted, the arm tail structure 1 is moved to the front of the access hole on the outer arm by moving the position of the inner arm in the outer arm, an operator can enter the outer arm from the access hole of the outer arm and is positioned at the rear of the arm tail structure 1, namely the direction of the tail end, and then pull out the gasket 4 in the slider base 2 from the opening of the side end of the slider base 2 positioned at the rear side of the arm tail structure 1, because the second opening 162 penetrates through the placing groove 16 from the tail end of the arm tail structure 1 in the front-rear direction, the gasket 4 pulled out from the opening 21 of the side end of the slider base 2 will continue to pass through the second opening 162 without being obstructed by other structures (such as the tail end of the arm tail structure 1, namely the vertical plate at the rear end) in the arm tail structure 1, or the gasket 4 is added to the slider base 2 from the opening of the side end of the arm tail structure 1 positioned at the rear side end in the slider base 2, therefore, the increase and decrease of the gasket 4 are realized, and further, the gap between the sliding block 3 and the inner wall of the outer joint arm is adjusted.

It should be noted that, in fig. 5, the placing groove 16 is provided with a first opening 161 towards the inner wall of the outer arm, that is, the top of the placing groove 16 is provided with the first opening 161, the placing groove 16 is provided with a second opening 162 at the tail end of the arm tail structure 1, that is, the rear end of the placing groove 16 is provided with the second opening 162, and it can be understood from another aspect that the placing groove 16 at the top of the arm tail structure 1 has four walls, that is, a left wall, a right wall, a bottom wall and a front wall. The placing groove can be a groove body structure dug out based on the arm tail structure, or can be a groove body structure formed by adding corresponding wall plates based on the arm tail structure, or the two structures are combined.

It can be understood that, after the inner arm is assembled into the outer arm 6, even if the clearance between the sliding block 3 and the inner wall of the outer arm needs to be adjusted, the fluctuation range of the clearance to be adjusted is very small (compared with the size of the sliding block 3), and the sliding block 3 is always located in the sliding block base 2, so that when the clearance between the sliding block 3 and the inner wall of the outer arm needs to be adjusted, the sliding block 3 cannot be separated from the sliding block base 2 from the top end opening 22 to the direction of the inner wall of the outer arm. In the outer arm section 6, the space at the rear side of the arm tail structure 1 of the inner arm section is large enough, an operator can enter the outer arm section from the access hole of the outer arm section and is positioned behind the arm tail structure 1, at the moment, the gasket 4 in the sliding block base 2 can be pulled out backwards from the side end opening 21 at the rear end of the arm tail structure 1 along the telescopic direction of the telescopic arm, and the gasket 4 can be moved out.

Optionally, the telescopic arm further comprises a positioning mechanism, which is disposed on the arm tail structure 1 and is used for limiting the movement of the slider base 2 and/or the pad 4 in the placing groove 16.

Here, after the inner arm is assembled into the outer arm, the positioning mechanism limits the movement of the slider base 2 in the placement groove 16 in the normal direction of the side wall of the arm tail structure 1, that is, in the direction from the slider 3 to the inner wall of the outer arm, that is, limits the relative movement of the slider base 2 with the arm tail structure 1 in the front-back direction (the telescopic direction of the telescopic arm), and finally prevents the slider 3 from coming out of the second opening 162 to the rear.

Optionally, the positioning mechanism comprises a fastener adapted to fix the slider base 2 in the placement slot 16.

Here, the positioning mechanism may be a fastener by which the slider base 2 is coupled with the placement groove 16 to restrict the movement of the slider base 2 in the placement groove 16.

Referring to fig. 5 and 8, optionally, the positioning mechanism includes a blocking member 17, and the blocking member 17 is disposed on the arm tail structure 1 and located at the second opening 162.

Here, the positioning mechanism may be a stopper 17 to limit the movement of the slider base 2 in the placement groove 16 in a "blocking" manner, the stopper 17 being provided at the second opening 162 of the placement groove 16 to prevent the slider base 2 from being detached rearward from the second opening 162 of the placement groove 16.

When the sliding block needs to be replaced, all the gaskets 4 can be taken out from the rear opening of the placing groove 16 and the side end opening 21 of the sliding block base 2, so that the gap between the sliding block 3 and the inner wall of the outer joint arm is the most approximate, then the sliding block base 2 is moved for a certain distance towards the direction of the inner wall of the outer joint arm, and then the sliding block base 2 is taken out backwards from the position between one end, close to the inner wall of the outer joint arm, of the blocking piece 17 and the inner wall of the outer joint arm.

Optionally, two blocking members 17 are respectively disposed at two ends of the second opening 162, the blocking members 17 are adapted to prevent the slider base 2 from falling off from the second opening 162 toward the tail end of the arm tail structure 1, and an interval between the two blocking members 17 is greater than or equal to the length of the side end opening 21.

Here, the two blocking members 17 are respectively disposed at the two ends (left end and right end) of the second opening 162, so that the limiting effect on the slider base 2 is better, and the distance between the two blocking members 17 is greater than or equal to the length of the side end opening 21 (the distance from the left end to the right end of the side end opening), thereby ensuring that the gasket 4 at the bottom of the slider base 2 can be directly drawn out backward without being blocked by the blocking members 17.

Referring to fig. 5, optionally, the bottom of the placing slot 16 is provided with an ejection hole 19.

Here, the bottom of the placement groove 16 is provided with an ejection hole 19. So, the ejection hole 19 is worn into from arm tail structure 1 inside to an accessible member, then ejecting towards outer festival arm inner wall direction with slider base 2, and after one end that outer festival arm inner wall was kept away from to slider base 2 was located to block between one end that piece 17 was close to outer festival arm inner wall and the outer festival arm inner wall, take out slider base backward from blocking between the one end that piece 17 was close to outer festival arm inner wall and the outer festival arm inner wall.

Optionally, the telescopic arm further comprises a pad fixing mechanism for fixing the pad 4 to prevent the pad 4 from falling off from the side end opening 21.

Here, when it is not necessary to increase or decrease the spacer to adjust the gap between the slider 3 and the inner wall of the outer arm, the spacer 4 is fixed to the slider base 2 by the spacer fixing mechanism.

Referring to fig. 6 to 8, optionally, the gasket fixing mechanism may include a second threaded connector 5, a first through hole 18 is formed at the bottom of the placing groove 16, a second through hole is formed at the bottom wall of the slider base 2, a third through hole is formed at the gasket 4, a fourth through hole is formed at the slider 3, and the second threaded connector 5 is adapted to pass through the first through hole 18, the second through hole and the third through hole in sequence and then penetrate through the fourth through hole, wherein the first through hole 18 and/or the second through hole are threaded holes.

Referring to fig. 8, the gasket fixing mechanism may alternatively include a first threaded connector 8 and a protruding strip 7, the protruding strip 7 is disposed on one side of the slider base 2 between the top end opening 22 and the side end opening 21, and the first threaded connector 8 is adapted to be threadedly connected with the protruding strip 7 to block the gasket 4 from moving out of the slider base 2 from the side end opening 21.

Here, by the threaded connection of the first threaded connection 8 with the projection bar 7, the first threaded connection can be stopped at the side end opening 21, thus preventing the spacer in the slider base 2 from falling out of the side end opening 21.

In addition, the utility model also provides a construction machine, and the construction machine comprises the telescopic arm. The work machine may be a crane.

Since the technical improvement and the technical effect of the construction machine are the same as those of the telescopic arm, the technical effect of the construction machine will not be described in detail.

The terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or an implicit indication of the number of technical features indicated. Thus, features defined as "first," "second," "third," and "fourth" may explicitly or implicitly include at least one of the features.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.

Claims (10)

1. A telescopic arm comprises an outer section arm (6) and an inner section arm positioned in the outer section arm (6), and is characterized by further comprising a slider base (2), a gasket (4) and a slider (3), wherein the side wall of an arm tail structure (1) of the inner section arm is provided with at least one placing groove (16), when the placing groove (16) comprises a plurality of placing grooves, the placing grooves (16) are circumferentially arranged, a first opening (161) is formed in the placing groove (16) towards the inner wall of the outer section arm (6), the tail end of the arm tail structure (1) is provided with a second opening (162), the second opening (162) is communicated with the placing groove (16), the slider base (2) is a box body structure with a top end opening (22) and a side end opening (21), the top end opening (22) is arranged corresponding to the first opening (161), and the side end opening (21) is arranged corresponding to the second opening (162), at least one of the pads (4) and the sliding block (3) is suitable for being sequentially stacked in the sliding block base (2), the sliding block (3) is suitable for at least partially extending out of the top end opening (22), and the pads (4) are suitable for entering and exiting the sliding block base (2) from the side end openings (21).

2. Telescopic arm according to claim 1, further comprising a positioning mechanism provided on the arm tail structure (1) for limiting the movement of the slider base (2) and/or shims (4) in the placement slot (16).

3. Telescopic arm according to claim 2, characterized in that said positioning means comprise fasteners suitable for fixing said slider base (2) in said resting slot (16).

4. Telescopic arm according to claim 2, wherein said positioning means comprise a blocking element (17), said blocking element (17) being arranged on said arm tail structure (1) at said second opening (162).

5. Telescopic arm according to claim 1, characterized in that the bottom of the standing groove (16) is provided with an ejection hole (19).

6. The telescopic arm according to claim 1, further comprising a pad fixing mechanism for fixing the pad (4) to prevent the pad (4) from falling out of the side end opening (21).

7. The telescopic arm according to claim 6, wherein the gasket fixing mechanism comprises a second threaded connector (5), a first through hole (18) is formed in the bottom of the placing groove (16), a second through hole is formed in the bottom wall of the slider base (2), a third through hole is formed in the gasket (4), a fourth through hole is formed in the slider (3), and the second threaded connector (5) is suitable for sequentially passing through the first through hole (18), the second through hole and the third through hole and then passing through the fourth through hole, wherein the first through hole (18) and/or the second through hole are threaded holes.

8. The telescopic arm according to claim 6, wherein said spacer fixing means comprise a first threaded connection (8) and a protruding strip (7), said protruding strip (7) being arranged on one side of said slider base (2) between said top end opening (22) and said side end opening (21), said first threaded connection (8) being adapted to be threaded with said protruding strip (7) to block said spacer (4) from moving out of said slider base (2) from said side end opening (21).

9. The telescopic arm according to claim 4, wherein two blocking members (17) are respectively arranged at two ends of the second opening (162), the blocking members (17) are suitable for preventing the slider base (2) from falling off from the second opening (162) to the tail end direction of the arm tail structure (1), and the interval between the two blocking members (17) is greater than or equal to the length of the side end opening (21).

10. A working machine, characterized by comprising a telescopic arm according to any of claims 1-9.

Images