阅读说明：本技术 一种伸缩箱型承载梁前端结构 (Front end structure of telescopic box type carrier bar ) 是由 李绍安 罗文豹 张福祥 吴雯 潘登 于 2019-11-14 设计创作，主要内容包括：本发明涉及一种伸缩箱型承载梁前端结构,包括同轴相对设置的固定梁组件以及活动梁组件,活动梁组件的端部设置在固定梁组件的端部内、并可沿固定梁组件的轴向滑动,固定梁组件的端部固定安装有门型框板,门型框板与固定梁组件的轴向垂直设置,固定梁组件的端部贯穿门型框板；活动梁组件的端部贯穿门型框板并与固定梁组件滑动配合；固定梁组件的内壁安装有导向辊子,导向辊子的轴向垂直固定梁组件的轴向设置,活动梁组件的端部贯穿门型框板并与导向辊子滑动配合。本发明提供的一种伸缩箱型承载梁前端结构,其运动灵活、磨损小、避免了门型框板四角的应力集中、结构安全可靠,提高了伸缩箱型承载梁的使用寿命。(The invention relates to a front end structure of a telescopic box type carrier bar, which comprises a fixed beam assembly and a movable beam assembly which are coaxially and oppositely arranged, wherein the end part of the movable beam assembly is arranged in the end part of the fixed beam assembly and can slide along the axial direction of the fixed beam assembly; the end part of the movable beam assembly penetrates through the door-shaped frame plate and is in sliding fit with the fixed beam assembly; the guide roller is installed to the inner wall of fixed beam subassembly, and the axial of guide roller sets up perpendicularly to the axial of fixed beam subassembly, and the tip of walking beam subassembly runs through door type deckle board and with guide roller sliding fit. The front end structure of the telescopic box type bearing beam provided by the invention has the advantages of flexible movement, small abrasion, capability of avoiding stress concentration at four corners of a door-shaped frame plate, safe and reliable structure and capability of prolonging the service life of the telescopic box type bearing beam.)

1. The front end structure of the telescopic box type carrier bar comprises a fixed beam assembly (1) and a movable beam assembly (2) which are coaxially and oppositely arranged, wherein the end part of the movable beam assembly (2) is arranged in the end part of the fixed beam assembly (1) and can slide along the axial direction of the fixed beam assembly (1), and is characterized in that a door-shaped frame plate (3) is fixedly arranged at the end part of the fixed beam assembly (1), the door-shaped frame plate (3) is vertically arranged with the axial direction of the fixed beam assembly (1), and the end part of the fixed beam assembly (1) penetrates through the door-shaped frame plate (3); the end part of the movable beam component (2) penetrates through the door-shaped frame plate (3) and is in sliding fit with the fixed beam component (1); guide rollers (4) are installed on the inner wall of the fixed beam assembly (1), the axial direction of each guide roller (4) is perpendicular to the axial direction of the fixed beam assembly (1), and the end portion of the movable beam assembly (2) penetrates through the door-shaped frame plate (3) and is in sliding fit with the guide rollers (4).

2. The front end structure of the telescopic box type carrier bar according to claim 1, wherein the fixed beam assembly (1) comprises a top plate (101), a bottom plate (102) and side plates (103) which are integrally connected, the door-shaped frame plate (3) is arranged perpendicular to the top plate (101), the bottom plate (102) and the side plates (103), an inner frame is arranged on the door-shaped frame plate (3), and the end part of the movable beam assembly (2) penetrates through the inner frame and is in clearance fit with the inner frame.

3. The front end structure of the telescopic box type carrier bar according to claim 2, wherein the side plates (103) penetrate through the inner frame and are clamped with the door-shaped frame plate (3), and the length of the end parts of the side plates (103) extending out of the door-shaped frame plate (3) is larger than the thickness of the side plates (103).

4. The front end structure of the telescopic box type carrier bar according to claim 2 or 3, wherein the top plate (101) penetrates through the door-shaped frame plate (3) and is clamped with the door-shaped frame plate (3), and the length of the end part of the top plate (101) extending out of the door-shaped frame plate (3) is greater than the thickness of the top plate (101).

5. The front end structure of the telescopic box type carrier bar according to claim 4, wherein the bottom plate (102) penetrates through the door-shaped frame plate (3) and is clamped with the door-shaped frame plate (3), and the length of the end part of the bottom plate (102) extending out of the door-shaped frame plate (3) is larger than the thickness of the bottom plate (102).

6. Front end structure of a telescopic box girder according to claim 3, characterised in that the inner frame of the door frame plate (3) is provided with grooves on both sides, the grooves being dimensioned to fit the ends (1031) of the side plates.

7. The front end structure of a telescopic box type carrier bar according to claim 3 or 4, wherein inner corners of the inner frame are rounded or elliptical corners.

8. A bellows type carrier bar front end structure according to claim 3, characterized in that the height of the end portions (1031) of the side panels is less than the height of the inner walls of the fixed beam assembly (1).

9. The front end structure of the telescopic box type carrier bar according to claim 1, wherein the fixed beam assembly (1) is further provided with a longitudinal rib (5), the longitudinal rib (5) is provided with right-angle sides, one of the right-angle sides is fixedly connected with the outer wall of the fixed beam assembly (1), and the other right-angle side is fixedly connected with the door-shaped frame plate (3).

10. The front end structure of a carrier bar for a telescopic box type according to claim 1, wherein the dimension of the longitudinal rib (5) in the axial direction of the fixed beam assembly (1) is not less than 5 times the dimension of the longitudinal rib (5) perpendicular to the axial direction of the fixed beam assembly (1).

Technical Field

The invention relates to the field of telescopic type bearing beams, in particular to a box type bearing beam which can be horizontally, vertically and obliquely stretched, such as a hoisting fixed support, a crane boom, an aerial operation and an engineering machinery fixed support, and particularly relates to a front end structure of the telescopic box type bearing beam.

Background

The outer surface that current flexible box formula carrier bar adopted movable box roof beam slides on fixed box roof beam inner wall, and the activity frictional resistance is big and wearing and tearing are fast on the one hand: the long-term abrasion causes the clearance to be increased, and the service life of the box girder is also influenced; on the other hand, four corners of a supporting area at the front end of the fixed box girder are right angles formed by the top plate, the bottom plate, the left side plate and the right side plate, and four corners of an inner frame of the door-shaped frame plate arranged at the foremost end are also right angles, so that the structure has the biggest problem that the door-shaped frame plate is easy to damage due to stress concentration at the right angles.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides the front end structure of the telescopic box type bearing beam, which has the advantages of flexible movement, small abrasion, capability of avoiding stress concentration at four corners of a door-shaped frame plate, safe and reliable structure and prolonged service life.

The technical scheme for solving the technical problems is as follows:

a front end structure of a telescopic box type carrier bar comprises a fixed beam assembly and a movable beam assembly which are coaxially and oppositely arranged, wherein the end part of the movable beam assembly is arranged in the end part of the fixed beam assembly and can slide along the axial direction of the fixed beam assembly; the end part of the movable beam assembly penetrates through the door-shaped frame plate and is in sliding fit with the fixed beam assembly; the inner wall of the fixed beam assembly is provided with a guide roller, the axial direction of the guide roller is perpendicular to the axial direction of the fixed beam assembly, and the end part of the movable beam assembly penetrates through the door-shaped frame plate and is in sliding fit with the guide roller.

The invention has the beneficial effects that: the front end structure of the telescopic box type bearing beam provided by the invention has the advantages of flexible movement, small abrasion, capability of avoiding stress concentration at four corners of a door-shaped frame plate, safe and reliable structure and capability of prolonging the service life of the telescopic box type bearing beam.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the fixed beam assembly comprises a top plate, a bottom plate, a left side plate and a right side plate which are connected in an integrated mode, the door-shaped frame plate is perpendicular to the top plate, the bottom plate, the left side plate and the right side plate, an inner frame is arranged on the door-shaped frame plate, and the end portion of the movable beam assembly penetrates through the inner frame and is in clearance fit with the inner frame. The end part of the movable beam assembly can telescopically slide in the end part of the fixed beam through the inner frame on the door-shaped frame plate so as to adjust the position of the movable beam assembly relative to the fixed beam assembly, the inner frame is used for positioning and guiding the movable beam assembly, and the movable beam assembly and the fixed beam assembly are arranged on the same straight line by the principle that two points determine a straight line. The arrangement of the door-shaped frame plate also enables the fixed beam assembly to increase the structural strength when bearing the movable beam assembly, and prevents the end part of the fixed beam assembly from cracking due to stress concentration.

Furthermore, the left side board with the tip of right side board all runs through the inside casing to respectively with door type deckle board joint, the tip of left side board the tip of right side board extends the length of door type deckle board all is greater than the thickness of curb plate. The left side board and the right side board respectively pass door type deckle board and with door type deckle board joint, fix door type deckle board for the position and the angle of fixed beam subassembly, prevent that door type deckle board from shifting when the walking beam subassembly is at the inside relative slip of fixed beam subassembly, do not reach the effect of support and direction.

Further, the top plate penetrates through the door-shaped frame plate and is clamped with the door-shaped frame plate, and the length of the end part of the top plate extending out of the door-shaped frame plate is larger than the thickness of the top plate.

Furthermore, the bottom plate runs through the door-shaped frame plate and is clamped with the door-shaped frame plate, and the length of the end part of the bottom plate extending out of the door-shaped frame plate is greater than the thickness of the bottom plate.

Furthermore, grooves are respectively arranged on two side edges of the inner frame of the door-shaped frame plate, and the size of each groove is matched with the end part of the left side plate and the end part of the right side plate. The end part of the left side plate and the end part of the right side plate are embedded into grooves on two sides of an inner frame of the door-shaped frame plate, so that the door-shaped frame plate is effectively positioned on the fixed beam assembly, and the door-shaped frame plate is prevented from shifting.

Further, the inner angle of the inner frame is set to be a round angle or an elliptical angle with a large radius, so that the problem of stress concentration caused by a right angle is avoided, the stress concentration of four corner regions of the inner frame of the door-shaped frame plate can be effectively reduced, and the inner frame of the door-shaped frame plate is prevented from cracking from a right-angle position due to the stress concentration of the inner frame, so that the door-shaped frame plate is torn and damaged.

Further, the height of the end part of the left side plate and the height of the end part of the right side plate are both smaller than the height of the inner wall of the fixed beam assembly. The height of the end parts of the left side plate and the right side plate is approximate to the height of an inner frame of the door-shaped frame plate, namely the height of the inner frame is smaller than the height of the inner wall of the fixing assembly, and the height difference between the left side plate and the right side plate is approximately equal to the diameter of the guide roller. When the movable beam assembly is slidably fitted in the fixed beam assembly, the bottom of the movable beam assembly is in contact with the bottom edge of the inner frame and the tread of the guide roller.

Further, still be equipped with vertical muscle on the fixed beam subassembly, be equipped with the right-angle side on the vertical muscle, one of them the right-angle side with the outer wall fixed connection of fixed beam subassembly, wherein another the right-angle side with door type deckle board fixed connection. The longitudinal ribs provide a secure connection between the door frame panel and the fixed beam assembly.

Further, the size of the longitudinal rib along the axial direction of the fixed beam assembly is not less than 5 times of the size of the longitudinal rib perpendicular to the axial direction of the fixed beam assembly. The door-shaped frame plate is installed on the outer wall of the fixed beam assembly by means of the plurality of longitudinal ribs, when the movable beam assembly moves towards the fixed beam assembly, the door-shaped frame plate simultaneously bears the thrust along the axial direction of the fixed beam assembly, the longitudinal ribs are arranged to be far larger than the axial dimension of the vertical rib vertical fixed beam assembly along the axial dimension of the fixed beam assembly, and the door-shaped frame plate can be effectively fixed on the fixed beam assembly when the door-shaped frame plate receives the thrust along the axial direction of the fixed beam assembly.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front view of a fixed beam assembly according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line D-D of FIG. 2 in accordance with the present invention;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2 in accordance with the present invention;

FIG. 5 is a left side view of a fixed beam assembly according to an embodiment of the present invention;

FIG. 6 is a side panel schematic of the present invention;

FIG. 7 is a schematic view of a door-shaped frame plate according to an embodiment of the present invention;

FIG. 8 is a schematic view of a door-shaped frame plate according to an embodiment of the present invention;

FIG. 9 is a front view of a second fixed beam assembly in accordance with an embodiment of the present invention;

FIG. 10 is a left side view of a second fixed beam assembly in accordance with an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a fixed beam assembly, 101, a top plate, 102, a bottom plate, 103, a side plate, 1031, an end part 1031, 2 of the side plate, a movable beam assembly, 3, a door-shaped frame plate, 4, a guide roller, 5 and a longitudinal rib;

h1, inner frame height, H2, side plate end height, H3, side plate height, B, groove width, L, length of the side plate end protruding out of the door-shaped frame plate, R, arc radius, t and thickness of the side plate.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

The front end structure of the telescopic box type carrier bar shown in fig. 1 comprises a fixed bar assembly 1 and a movable bar assembly 2 which are coaxially and oppositely arranged, wherein the end part of the movable bar assembly 2 is arranged in the end part of the fixed bar assembly 1 and can slide along the axial direction of the fixed bar assembly 1, a door-shaped frame plate 3 is fixedly arranged at the end part of the fixed bar assembly 1, the door-shaped frame plate 3 is vertically arranged with the axial direction of the fixed bar assembly 1, and the end part of the fixed bar assembly 1 penetrates through the door-shaped frame plate 3; the end part of the movable beam component 2 penetrates through the door-shaped frame plate 3 and is in sliding fit with the fixed beam component 1; the inner wall of the fixed beam assembly 1 is provided with a guide roller 4, the axial direction of the guide roller 4 is perpendicular to the axial direction of the fixed beam assembly 1, and the end part of the movable beam assembly 2 penetrates through the door-shaped frame plate 3 and is in sliding fit with the guide roller 4.

The front end structure of the telescopic box type bearing beam provided by the embodiment is flexible in movement, small in abrasion, safe and reliable in structure, and capable of avoiding stress concentration at four corners of the door-shaped frame plate 3 and prolonging the service life of the telescopic box type bearing beam.

On the basis of the technical scheme, the invention can be further improved as follows.

As shown in fig. 1, the fixed beam assembly 1 includes a top plate 101, a bottom plate 102, a left side plate 103, and a right side plate 103, which are fixedly connected to each other in an integrated manner, the left side plate 103 and the right side plate 103 are symmetrically disposed, the gate frame plate 3 is disposed perpendicular to the top plate 101, the bottom plate 102, the left side plate 103, and the right side plate 103, and both the top plate 101 and the bottom plate 102 are welded to the gate frame plate 3 in a t-joint manner. An inner frame is arranged on the door-shaped frame plate 3, and the end part of the movable beam component 2 penetrates through the inner frame and is in clearance fit with the inner frame. The end part of the movable beam assembly 2 can be telescopically slid in the end part of the fixed beam through the inner frame on the door-shaped frame plate 3 so as to adjust the position of the movable beam assembly 2 relative to the fixed beam assembly 1, the inner frame is used for positioning and guiding the movable beam assembly 2, and the movable beam assembly 2 and the fixed beam assembly 1 are ensured to be arranged on the same straight line through the principle that two points determine a straight line. The arrangement of the door-shaped frame plate 3 also enables the fixed beam assembly 1 to increase the structural strength when bearing the movable beam assembly 2, and prevents the fixed beam assembly 1 from cracking due to stress concentration at the end part.

As shown in fig. 2 to 5, the end portions 1031 of the left side plate 103 and the right side plate penetrate through the inner frame, and are respectively connected with the door-shaped frame plate 3 in a clamping manner and then welded. The tip 1031 of the left side board and the tip 1031 of the right side board pass door type framed panel 3 respectively and with door type framed panel 3 joint, the tip 1031 of the left side board all extends the terminal surface of door type framed panel 3 with the tip 1031 of the right side board, in this embodiment, the length L that curb plate 103 bulges door type framed panel 3 is not less than 8mm, fix door type framed panel 3 for the position and the angle of fixed beam subassembly 1, prevent that door type framed panel 3 from shifting when portable beam subassembly 2 is inside relative slip at fixed beam subassembly 1, reach not support with the effect of direction. Meanwhile, the penetrating mode that the side plate 103 protrudes out of the door-shaped frame plate 3 is adopted, the processing manufacturability of the door-shaped frame plate 3 is simple before welding, and the welding strength of the door-shaped frame plate 3, the side plate 103 and the whole end part of the fixed beam assembly 1 is higher.

As shown in fig. 5, grooves are respectively formed on two sides of the inner frame of the door frame 3, and the size of the groove is matched with the end 1031 of the left side plate and the end 1031 of the right side plate. The end 1031 of the left side plate and the end 1031 of the right side plate are embedded into the grooves on two sides of the inner frame of the door-shaped frame plate 3, so that the door-shaped frame plate 3 is effectively positioned on the fixing beam assembly 1 and the door-shaped frame plate 3 is prevented from being displaced. More specifically, the height H2 of the groove is consistent with the height of the end 1031 of the left side plate and the height of the end 1031 of the right side plate, so that the end 1031 of the left side plate and the end 1031 of the right side plate are firmly embedded into the grooves at two sides of the inner frame of the door-shaped frame plate 3 and cannot move up and down; the width B of the groove is larger than the thickness t of the left side plate 103 and the right side plate, and lower spaces are reserved for installing guide rollers 4 between the left side plate 103 and the movable beam assembly 2 and between the right side plate 103 and the movable beam assembly 2 respectively.

As shown in fig. 7 and 8, four inner corners of the inner frame are set as round corners or elliptical corners with large radius, and two adjacent edges on the inner corners are in smooth transition, so that the problem of stress concentration caused by setting the inner corners to be right angles is avoided, the stress concentration in four corner regions of the inner frame of the door-shaped frame plate 3 can be effectively reduced, and the inner frame of the door-shaped frame plate 3 is prevented from cracking from the right angle position due to the stress concentration of the inner frame, so that the door-shaped frame plate 3 is prevented from being torn and damaged. When the inner angle of the inner frame is set to be a circular arc, the radius R of the circular arc is not less than 15 mm; when the inner angle of the inner frame is set to be an elliptical arc, the transverse edge of the inner frame is parallel to the long axis of the elliptical arc, the longitudinal edge of the inner frame is parallel to the short axis of the elliptical arc, and the long axis of the elliptical arc is not less than twice of the short axis.

As shown in fig. 6, the height of the end 1031 of the left side plate and the height of the end 1031 of the right side plate are both smaller than the height of the inner wall of the fixing beam assembly 1. The height of the end 1031 of the left and right side plates 103 and 1031 is approximately equal to the groove height H2 on the inner frame of the door-shaped frame plate 3, and the inner frame height H1 is greater than the groove height H2 because the inner corners of the inner frame are rounded or elliptical corners having a large radius. The height of the walking beam assembly is less than the height H1 of the inner frame. Since the guide rollers 4 are arranged on the top plate 101 and the bottom plate 102, the plane of the guide rollers 4 contacting the walking beam assembly 2 approximately coincides with the transverse edge of the inner frame in order to guide and support the inner frame. The height of the inner wall of the fixed beam assembly 1 is approximately equal to the height of the side plate H3, i.e. the height of the inner frame H1 is less than the height of the inner wall of the fixed assembly, the height of the inner frame H1 is less than the height of the side plate H3, the difference in height between the two being approximately equal to the diameter of the guide roller 4. When the movable beam assembly 2 is slidably fitted in the fixed beam assembly 1, the bottom of the movable beam assembly 2 is in contact with the bottom edge of the inner frame and the tread of the guide rollers 4.

As shown in fig. 1-2, the fixed beam assembly 1 is further provided with a longitudinal rib 5, and the longitudinal rib 5 is installed on a top plate 101 and/or a bottom plate 102 of the fixed beam assembly 1. The longitudinal ribs 5 are provided with right-angle sides, one of the right-angle sides is fixedly connected with the outer wall of the fixed beam assembly 1, more specifically, one of the right-angle sides is fixedly connected with the outer wall of the top plate 101 or the outer wall of the bottom plate 102 of the fixed beam assembly 1, and the other right-angle side is fixedly connected with the door-shaped frame plate 3. The longitudinal ribs 5 provide a secure connection between the door frame plate 3 and the fixed beam assembly 1.

Further, the size of the longitudinal rib 5 along the axial direction of the fixed beam assembly 1 is not less than 5 times of the size of the longitudinal rib 5 perpendicular to the axial direction of the fixed beam assembly 1. Door type deckle board 3 relies on a plurality of vertical muscle 5 to install on fixed beam assembly 1's outer wall, when walking beam assembly 2 moves towards fixed beam assembly 1, door type deckle board 3 bears simultaneously along the 1 axial thrust of fixed beam assembly, set up vertical muscle 5 and be greater than the 1 axial size of vertical muscle 5 vertical fixation roof beam assemblies far away along the 1 axial size of fixed beam assembly, make door type deckle board 3 still can fix door type deckle board 3 on fixed beam assembly 1 effectively when receiving along 1 axial thrust of fixed beam assembly.