CN216518051U

CN216518051U - Supporting shed frame with self-locking structure

Info

Publication number: CN216518051U
Application number: CN202122446457.3U
Authority: CN
Inventors: 王梁; 王海军; 王洪磊; 赵建; 刘少权; 曹云; 孟建新; 杨晓辉; 刘凡; 王振; 杜学飞; 赵嘉宇
Original assignee: General Coal Research Institute Co Ltd
Current assignee: General Coal Research Institute Co Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-05-13
Anticipated expiration: 2031-10-11

Abstract

The utility model relates to the technical field of roadway support, and discloses a support shed frame with a self-locking structure. The top beam is suitable for abutting against the top of the roadway; the first ends of the shoulder beams are rotatably connected with one end of the top beam, and the two shoulder beams are respectively connected with the two ends of the top beam; the support columns are rotatably connected with the second ends of the shoulder beams, the two support columns are respectively connected with the two shoulder beams, and the support columns are telescopic; the upper connecting boots are rotatably connected with the second ends of the shoulder beams, the upper connecting boots are positioned on the outer sides of the shoulder beams and the supporting columns, and the upper connecting boots are suitable for abutting against the side walls of the roadway. The utility model adopts multi-section mechanical devices for hinged connection, can form a polygonal inner support structure which is suitable for a roadway, can be folded or contracted into a contraction state with smaller occupied space in a non-support state, and is convenient to carry.

Description

Supporting shed frame with self-locking structure

Technical Field

The utility model relates to the technical field of roadway support, in particular to a supporting shed frame with a self-locking structure.

Background

Most of the existing roadway supporting and protecting devices adopt a hydraulic oil cylinder for supporting, and a supporting pump station is required in the supporting and protecting mode, so that the supporting and protecting device is large in size. And the existing hydraulic cylinder supporting and protecting device basically needs manual work to connect the liquid injection and liquid outlet pipelines in the mounting and dismounting processes, so that the operation is very complicated, and the carrying and mounting are difficult.

In addition, no matter the existing oil cylinder type supporting and supporting device uses hydraulic oil or emulsion, the leakage and seepage faults of the oil cylinder type supporting and supporting device frequently occur due to the problems of large matched pump station, complex loop and pipeline, various control systems and the like of the supporting and supporting device; and need frequently carry out pipe connection and pull in its installation and dismouting in-process, the inevitable a large amount of leakages that produce of liquid in the pipeline at this in-process to cause very big pollution to mine underground environment, especially cause irreparable pollution to the river system of near region, and then seriously influence the drinking water safety of masses and the descendants of the future, urgent need to solve.

Disclosure of Invention

The present invention is based on the discovery and recognition by the inventors of the following facts and problems: the existing roadway supporting device has large volume and weight, is very complicated to operate in the installation and disassembly processes, and is difficult to carry and install.

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

To this end, an embodiment of the present invention provides a supporting shed frame with a self-locking structure, where the supporting shed frame includes a top beam, two shoulder beams, two supporting columns, and two upper receiving shoes. The top beam is suitable for abutting against the top of the roadway; the first ends of the shoulder beams are rotatably connected with one end of the top beam, and the two shoulder beams are respectively connected with the two ends of the top beam; the support column comprises an upper support leg, a lower support leg and a locking assembly; the upper supporting leg is rotatably connected with the second end of the shoulder beam, and a ratchet bar is arranged on the inner wall surface of the upper supporting leg; the lower leg is slidably fitted in the upper leg along the length direction of the upper leg; said locking assembly being connected to said lower leg, said locking assembly including a pawl rotatable between an open position wherein said pawl engages said ratchet bar to lock said upper leg and said lower leg and a closed position wherein said pawl is disengaged from said ratchet bar; the upper connecting boots are rotatably connected with the second ends of the shoulder beams, the upper connecting boots are positioned on the outer sides of the shoulder beams and the supporting columns, and the upper connecting boots are suitable for abutting against the side walls of the roadway.

Has the advantages that: this strut rack adopts the articulated connection of multistage mechanical device according to the inside shape in tunnel, can constitute the interior support structure of polygon that suits with the tunnel to can fold or contract when non-support state and occupy less shrink state for the space, convenient transport. When the supporting shed frame is in a supporting state, the shoulder beam and the top beam are in a trapezoidal posture, so that when the top beam is pressed, the pressure from the top can generate positive pressure component force to the upper shoe through the shoulder beam, the positive pressure component force can enable the upper shoe and the roadway side shoe to generate upward friction resistance, the friction resistance is positively related to the top pressure, the self-energizing effect is achieved, the pressure to the supporting column below is reduced, the requirement on the supporting force of the supporting column is lowered, and therefore the light and handy supporting column structure can be achieved, and the occupied volume is reduced. In addition, the locking assembly arranged in the utility model can also lighten and simplify the whole anti-loosening pre-tightening support column.

In some embodiments, the support canopy further comprises a flexible mat disposed on the top beam along a length of the top beam; the longitudinal section of the flexible pad is in an arch shape, and the thickness of the flexible pad is gradually reduced from the middle to two ends.

In some embodiments, the upper boot includes an upper portion and a connecting portion pivotally connected to the second end of the shoulder beam, the upper portion having barbs thereon.

In some embodiments, the locking assembly further comprises a housing, a connecting rod, and an operating lever, the housing being connected to the upper end of the lower leg, at least a portion of the pawl being located within the housing, the pawl being rotatably pivoted to the housing; the connecting rod is positioned in the shell, and one end of the connecting rod is connected with the tail end of the pawl; one end of the operating rod is positioned in the shell, the other end of the operating rod is connected with the other end of the connecting rod, and the operating rod can slide along the length direction of the shell to drive the ratchet bar to rotate between the opening position and the closing position.

In some embodiments, the ratchet bar, the pawl and the connecting rod are in one-to-one correspondence, the two ratchet bars are oppositely arranged on the inner wall surface of the upper supporting leg, and in the opening position, tail parts of the two pawls are pressed against each other; the locking assembly further comprises a first stop piece and a first return spring, the other end of the operating rod is located outside the shell and connected with the first stop piece, the first return spring is sleeved outside the operating rod, one end of the first return spring abuts against the outer wall surface of the shell, and the other end of the first return spring abuts against the first stop piece.

In some embodiments, the locking assembly further includes a locking pin connected to the operating lever and penetrating through the housing in a thickness direction of the housing, the locking pin is slidable in the thickness direction of the housing, a first through hole is formed at a lower end of the upper leg, the locking pin is adapted to fit into the first through hole so as to relatively fix the upper leg and the lower leg, a second through hole is formed in the locking pin in a radial direction, the operating lever penetrates through the second through hole, and a dimension of the second through hole in the length direction of the locking pin is larger than a dimension of the operating lever in the length direction of the locking pin; the locking assembly further comprises a locking pin guide rod, a sliding groove is formed in the side wall of the operating rod along the length direction of the operating rod, the locking pin guide rod is connected with the locking pin, and one end of the locking pin guide rod is slidably matched in the sliding groove; the locking subassembly still includes second reset spring, second reset spring cover is established the outside of locking round pin, the week side of locking round pin is equipped with the annular arch, second reset spring's one end with the protruding counterbalance of annular links to each other, the other end with the inner wall of casing offsets.

In some embodiments, the supporting shed frame further comprises a tensioning assembly, the tensioning assembly comprises a tensioning rod and a tensioning spring, one end of the tensioning rod is connected with the shell, the other end of the tensioning rod is connected with the upper end of the lower supporting leg, the tensioning spring is sleeved on the outer side of the tensioning rod, one end of the tensioning spring abuts against the shell, and the other end of the tensioning spring abuts against the lower supporting leg.

In some embodiments, the support canopy frame further comprises a foot assembly rotatably connected to a lower end of the lower leg; the bottom foot assembly comprises a bottom foot body, a connecting disc, a bottom foot closing sliding block and a bottom foot connecting rod, the connecting disc is connected with the bottom foot body, and the connecting disc is rotatably connected with the lower end of the lower supporting leg; the lower supporting leg is provided with a sliding rail, the foot closing sliding block is slidably arranged in the sliding rail, and at least part of the foot closing sliding block is positioned on the outer side of the lower supporting leg, so that the upper supporting leg can be in contact with the foot closing sliding block; one end of the foot connecting rod is rotatably connected with the connecting disc, and the other end of the foot connecting rod is rotatably connected with the foot closing sliding block.

In some embodiments, the foot-closing sliding block comprises a sliding block body and a pushing plate which are connected, the sliding rail is arranged in the lower supporting leg, the sliding block body is slidably arranged in the sliding rail, and the pushing plate is positioned on the outer side of the lower supporting leg.

In some embodiments, the foot assembly further includes a third return spring, a third return spring guide rod, and a second stop member, one end of the third return spring guide rod penetrates through one end of the slide rail along the length direction of the slide rail and is connected to the foot-receiving slider, the other end of the third return spring guide rod is connected to the second stop member, the third return spring is sleeved on the third return spring guide rod, one end of the third return spring abuts against the second stop member, and the other end of the third return spring abuts against one end of the slide rail.

Drawings

Fig. 1 is an overall structural view of the present invention.

Fig. 2 is a force analysis diagram of the present invention at the time of installation.

Fig. 3 is a force analysis diagram of the present invention when the top beam is pressed.

FIG. 4 is a view showing the construction of the upper receiving boot of the present invention.

Figure 5 is a front view of the support post of the present invention in a collapsed condition.

Figure 6 is a right side view of the support post of the present invention in a collapsed condition.

Figure 7 is a rear view of the support post of the present invention in a collapsed condition.

Fig. 8 is a sectional view taken along line a-a of fig. 5.

Fig. 9 is a sectional view taken along line B-B in fig. 5.

Fig. 10 is a sectional view taken along line C-C of fig. 5.

Fig. 11 is a partial enlarged view at D in fig. 9.

Fig. 12 is a sectional view taken along line E-E of fig. 6.

Fig. 13 is a partial enlarged view at F in fig. 12.

Fig. 14 is a schematic view of the locking pin of the present invention assembled with a locking pin guide bar.

Figure 15 is a block diagram of the support post of the present invention after deployment.

Fig. 16 is an enlarged partial view of the bottom portion of fig. 5.

Fig. 17 is a partial enlarged view of the bottom portion of fig. 8.

Fig. 18 is a perspective view of the coupling disc of the present invention after it has been secured to the body of the foot.

Reference numerals: 1. a top beam; 2. a flexible pad; 3. a shoulder beam; 4. connecting upper boots; 401. a connecting portion; 402. connecting the upper part; 403. a barb; 5. an upper support leg; 501. a first through hole; 6. a lower leg; 601. a notch; 7. a first rotating shaft; 8. a second rotating shaft; 9. a ratchet bar; 10. a second return spring; 11. a pawl; 12. a housing; 13. a joystick; 1301. a chute; 14. a connecting rod; 15. a pin shaft; 16. a first stopper; 17. a first return spring; 18. a locking pin; 1801. a second through hole; 19. a locking pin guide lever; 20. a tension rod; 21. tensioning the spring; 22. a footing body; 2201. anti-skid nails; 23. a connecting disc; 24. a foot retracting slider; 2401. pushing the plate; 2402. a slider body; 25. a footing connecting rod; 26. a third rotating shaft; 27. a slide rail; 28. a third return spring; 29. a third return spring guide bar; 53. an inner support hole; 54. a fourth rotating shaft; 57. side walls of the roadway; 58. a second stop.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

Referring to fig. 1 to 18, the present embodiment provides a supporting shed frame with a self-locking structure, which includes a top beam 1, two shoulder beams 3, two supporting columns and two upper receiving shoes 4. The top beam 1 is suitable for abutting against the top of the roadway; the two shoulder beams 3 are respectively arranged at two ends of the top beam 1, and the first ends of the shoulder beams 3 are hinged with the end part of the top beam 1 through a first rotating shaft 7; one end of each supporting column is hinged with the second end of each shoulder beam 3 through a second rotating shaft 8, the two supporting columns are respectively connected with the two shoulder beams 3, the supporting columns can stretch, and the overall height of the supporting shed frame can be adjusted through stretching of the supporting columns; the upper shoe 4 is also hinged to the second end of the shoulder beam 3 through a second rotating shaft 8, the upper shoe 4 is located on the outer side of the shoulder beam 3 and the supporting column, and the upper shoe 4 is suitable for abutting against the side wall of the roadway. The top beam 1, the shoulder beam 3 and the support column are always in the same plane, so that the axes of the first rotating shaft 7 and the second rotating shaft 8 are parallel to each other.

The support column in this embodiment includes an upper leg 5, a lower leg 6, and a locking assembly. The inner part of the upper supporting leg 5 is of a hollow structure, namely, a cavity for accommodating the lower supporting leg 6 is formed in the upper supporting leg 5, and a ratchet bar 9 is arranged on the inner wall surface of the upper supporting leg 5; as a preferred embodiment, the ratchet bar 9 may be integrally formed with the upper leg 5. In addition, the ratchet bar 9 can be detachably connected with the upper leg 5, for example, the ratchet bar 9 can also be fixed with the inner wall of the upper leg 5 by a connector such as a bolt. The lower leg 6 is slidably fitted in the upper leg 5 in the length direction of the upper leg 5, and the lower leg 6 is insertedly fitted in a cavity of the upper leg 5 at the time of assembly.

Referring to fig. 1, when in use, the top beam 1 is contacted with the top of the roadway and keeps a compacted state through the mounting device, the upper-connecting boots 4 are contacted with the side walls 57 of the roadway and keep the compacted state, the supporting columns are extended and connected with the bottom, and the integral supporting shed frame forms an approximately omega-shaped supporting state. When the supporting shed frame is in a supporting state, the shoulder beam 3 and the top beam 1 are in a trapezoidal posture, so that when the top beam 1 is pressed, the pressure from the top can generate positive pressure component force to the upper shoe 4 through the shoulder beam 3, the positive pressure component force can enable the upper shoe 4 and the roadway side wall 57 to generate upward friction resistance, the friction resistance is positively correlated with the top pressure, the self-energizing effect is achieved, the pressure to a supporting column below is reduced, the requirement on the supporting force of the supporting column is lowered, and therefore the light and handy supporting column structure can be achieved, and the occupied volume is reduced.

And (3) carrying out stress analysis on the supporting shed frame according to the supporting state and the using process of the supporting shed frame, wherein the stress analysis in the installation process is shown in figure 2, and an included angle between a supporting column and the roadway side wall 57 is set as alpha, and an included angle between the shoulder beam 3 and the roadway side wall 57 is set as beta.

In order to facilitate calculation, influence of the distribution position of the friction force of the roadway side wall 57 is ignored, the friction force of the roadway side wall 57 to the butt-joint upper shoe 4 is translated to the hinge central point, and stress decomposition and synthesis are carried out according to the vertical direction and the horizontal direction.

Vertical component force of supporting force:

F₁₁＝F₁cos α, wherein F₁Supporting force for the supporting column;

horizontal component force of supporting force:

F₁₂＝F₁·sinα

the reaction force of the shoulder beam 3 is positive on the roadway side wall 57:

F₁₁₂＝F₁₁·tgβ＝F₁·cosα·tgβ

downward friction force of the tunnel side wall 57 against the upper shoe 4 during initial support:

F_μ1＝(F₁₂+F₁₁₂)·μ₁＝F₁(sinα+cosα·tgβ)μ₁

the primary supporting force of the supporting shed frame during primary supporting:

F_{first stage}＝F₁₁-F_μ1＝F₁·cosα-F₁(sinα+cosα·tgβ)μ₁

＝F₁(cosα-μ₁·sinα-μ₁·cosα·tgβ)

When the top beam 1 is pressed, the stress analysis of the supporting shed frame is shown in figure 3, and at this time, half of the pressure of the top beam 1 (the two sides of the supporting shed frame are symmetrically designed) is set as F₂Its supporting force F with the supporting shed frame₁₁The new balance is obtained by the friction force, and the friction force of the tunnel side wall 57 to the upper shoe 4 is upward and is set as F_μ2At this time:

F₁₁＝F₂-F_μ2

at this time, F₂Acting force F on roadway side wall 57 by being decomposed into shoulder beam 3₂₀Because the stress decomposition angles of the upper and lower hinged points of the shoulder beam 3 are the same and the acting force and the reacting force are the same, the positive pressure F is exerted on the roadway side wall 57₂₁Comprises the following steps:

F₂₁＝F₂·tgβ

at this time, the supporting force F of the supporting shed frame₁The component force of the top support is the same as that of the initial support, but the top support 1 presses the top support, the upper connecting shoe 4 has a downward movement tendency, the friction force of the tunnel side upper 57 to the upper connecting shoe 4 is upward, in order to better utilize the friction force of the tunnel side upper 57 to the upper connecting shoe 4, a barb 403 structure can be arranged on the contact surface of the upper connecting shoe 4, so that the upward friction coefficient is different from the downward friction coefficient, as shown in fig. 3, the downward friction coefficient is set to be mu₂Then, the friction force of the tunnel side wall 57 against the upper shoe 4 at this time is:

F_μ2＝(F₁₂+F₂₁)·μ₂＝(F₁·sinα+F₂·tgβ)·μ₂

in addition, the first and second substrates are,

F₁₁＝F₂-F_μ2＝F₂-(F₁·sinα+F₂·tgβ)·μ₂

due to F₁₁＝F₁Cos α, i.e.

F₁·cosα＝F₂-(F₁·sinα+F₂·tgβ)·μ₂

Solving to obtain:

F₁＝F₂(1-μ₂·tgβ)/(cosα+μ₂·sinα)

as can be seen from the formula, the friction force between the upper receiving boot 4 and the roadway side wall 57 is pressed F along with the top plate₂Is increased, a self-energizing effect is produced, when beta and alpha take appropriate values, F₁Much less than F₂That is, when the supporting shed frame provides a small supporting force, a great working resistance can be obtained. For example, when β is 40 °, α is 3 °, μ₂When 1 (empirical value), F₁≈0.15F₂。

In some embodiments, the support shed further comprises a flexible mat 2 provided on the top beam 1 along the length of the top beam 1. The longitudinal section of the flexible cushion 2 is in an arch shape, and the thickness of the flexible cushion 2 is gradually reduced from the middle to two ends. The top of the supporting shed frame adopts a design and manufacturing mode of the flexible cushion 2, so that when the top beam 1 of the supporting shed frame is in a supporting state, the supporting load of the top beam is in arch distribution with relatively smaller two ends and relatively larger middle, thereby enabling the supporting effect of the top beam on the roadway to reach the optimal state, and greatly reducing the requirement on the initial supporting force of the supporting shed frame.

Referring to fig. 4, the upper boot 4 comprises an upper connecting part 402 and a connecting part 401 which are connected, the connecting part 401 is hinged with the second end of the shoulder beam 3 through a second rotating shaft 8, and a barb 403 is arranged on the upper connecting part 402. When the supporting shed frame is used, the barb 403 structure on the upper receiving part 402 is contacted with the roadway side wall 57, so that the friction coefficient of the downward sliding of the upper receiving shoe 4 is far greater than that of the upward sliding, and the self-energizing effect of the top beam 1 during the coming pressure is further enhanced. And the inner side surfaces of the upper supporting leg 5 and the lower supporting leg 6 are respectively provided with a circular inner supporting hole 53.

The locking assembly is connected to the lower leg 6 and comprises a pawl 11, the pawl 11 being rotatable between an open position and a closed position. In the open position, the pawl 11 engages with the ratchet 9 to lock the upper leg 5 and the lower leg 6, and the upper leg 5 and the lower leg 6 cannot slide relative to each other; in the closed position, the pawl 11 is separated from the ratchet bar 9, and the upper leg 5 and the lower leg 6 can slide relatively, so that the telescopic adjustment of the support column is realized.

The support column in the embodiment realizes controllable extension and retraction between the upper support leg 5 and the lower support leg 6 in a mode that the pawl 11 is matched with the ratchet bar 9, and can achieve a stable support effect. The support column provided by the utility model can replace the traditional oil cylinder type support column, does not need to adopt a hydraulic oil cylinder for supporting, and avoids environmental pollution caused by oil leakage. Moreover, the mounting, dismounting and mounting process of the support column is simpler, manual connecting pipelines are not needed in comparison with a pressure oil cylinder support column, an auxiliary pump station is not needed, automation is easy to realize, and the support column has the advantages of light weight and easiness in carrying. In addition, when the support column is in a long-time support state, the support column does not have the support aging caused by leakage of hydraulic oil cylinder support columns, and therefore the support safety is improved.

The latch assembly further comprises a housing 12, an operating lever 13 and a connecting rod 14. The housing 12 is also disposed within the cavity of the upper leg 5 and one end of the housing 12 is connected to the upper end of the lower leg 6, the housing 12 moving synchronously with the lower leg 6 as the lower leg 6 slides within the upper leg 5. One end of the operating lever 13 is located in the housing 12 and connected to the rear end of the connecting rod 14, and the operating lever 13 is slidable along the length of the housing 12 (which is the same as the length of the lower leg 6) to rotate the pawl 11 between the open position and the closed position.

In specific implementation, a through hole for passing the operating lever 13 is formed in the top center of the housing 12, and the operating lever 13 is inserted into the through hole in the housing 12 and can slide in the through hole along the length direction of the lower leg 6. The cross-sectional shape of the operating lever 13 is designed to be non-circular (e.g., rectangular), and the shape of a through-hole in the housing 12 for the operating lever 13 to pass through matches the cross-sectional shape of the operating lever 13, thereby preventing the operating lever 13 from rotating about its axis. The connecting rod 14 is positioned in the shell 12, one end of the connecting rod 14 is hinged with the rod body of the operating rod 13, and the other end of the connecting rod 14 is hinged with the tail end of the pawl 11. The pawl 11 is at least partially located within the housing 12, and an end of the pawl 11 remote from the connecting rod 14 is adapted to engage with the ratchet bar 9. The pawl 11 is pivotally connected with the housing 12 in a rotatable manner, in the specific implementation, a pin hole penetrating through two side surfaces of the pawl 11 can be formed in the pawl 11, a pin shaft 15 is inserted into the through hole in the pawl 11, two ends of the pin shaft 15 are fixed with the housing 12, and the pawl 11 can rotate around the pin shaft 15 under the pulling action of the connecting rod 14, so that the engagement and the separation between one end of the pawl 11, which is far away from the connecting rod 14, and the ratchet bar 9 are realized.

In some embodiments, the ratchet bars 9, the pawls 11 and the connecting rods 14 are two and correspond to each other, the two ratchet bars 9 are oppositely arranged on the inner wall surface of the upper leg 5, in the open position, the tail portions of the two pawls 11 are pressed against each other, and the two ratchet bars 9, the two pawls 11 and the two connecting rods 14 are symmetrically distributed on two sides of the operating rod 13. Two pawls 11 are connected with control rod 13 through two connecting rods 14 to realize that two pawls 11 open and shut in step, can guarantee through the manipulation to control rod 13 that two pawls 11 are in the locking or state of opening simultaneously, make two pawls 11 and two ratchet bars 9 atress simultaneously when the support column is worked, and its overall structure can play a balanced effect to the atress of two pawls 11 and two ratchet bars 9, thereby reduce the intensity requirement of pawl 11 and ratchet bar 9, and improve the stability and the security that the support column supported.

In some embodiments, the locking assembly further includes a first stop member 16 and a first return spring 17, and one end of the operating rod 13 extends to the outside of the housing 12 and is fixedly connected to the first stop member 16. The first return spring 17 is a compression spring, the first return spring 17 is sleeved on the outer side of the operating lever 13 between the first stop member 16 and the housing 12, one end of the first return spring 17 abuts against the outer wall surface of the housing 12, and the other end abuts against the first stop member 16.

When in use, the operating rod 13 can be operated to move up and down through the first stop member 16, so that the pawl 11 is meshed with and separated from the ratchet rack 9, and the specific principle is as follows: the operating rod 13 moves downwards by pressing the first stop piece 16, the first return spring 17 is compressed, the connecting rod 14 connected with the bottom of the operating rod 13 pushes the pawl 11 to rotate, one end of the pawl 11 close to the ratchet rack 9 rotates towards the operating rod 13, meanwhile, because the shell 12 and the lower leg 6 have the tendency of moving downwards, the separation of the pawl 11 and the ratchet rack 9 can be easily realized, and finally, the pawl 11 moves to the closed position, at this time, the upper leg 5 and the lower leg 6 can slide relatively, and the extension or the shortening of the support column can be realized; after the supporting column is lengthened or shortened to a required length, the pressing force applied to the first stop member 16 is removed, then under the elastic force of the first return spring 17, the operating rod 13 slides upwards, the connecting rod 14 connected to the bottom of the operating rod 13 drives the pawl 11 to rotate, finally, one end of the pawl 11 far away from the connecting rod 14 is clamped between teeth of the ratchet rack 9, one ends of the two pawls 11 are contacted with each other, at the same time, the upper leg 5 and the lower leg 6 are locked with each other, and the supporting column is not telescopic.

In some embodiments, the locking assembly further includes a locking pin 18, the locking pin 18 is connected to the operating lever 13 and penetrates through the housing 12 along a thickness direction (a left-right direction indicated by an arrow G in fig. 10) of the housing 12, the locking pin 18 is slidable along the thickness direction of the housing 12, the upper end of the upper leg 5 is provided with a first through hole 501, and the locking pin 18 is adapted to be fitted in the first through hole 501 to relatively fix the lower leg 6 of the upper leg 5. The locking pin 18 is provided with a second through hole 1801 opened along a radial direction thereof, the operating lever 13 penetrates through the second through hole 1801, and in order to ensure that the locking pin 18 can slide along a thickness direction of the housing 12, a dimension of the second through hole 1801 in a length direction of the locking pin 18 is larger than a dimension of the operating lever 13 in the length direction of the locking pin 18 (the same as a left-right direction indicated by an arrow G in fig. 10).

The locking subassembly still includes locking round pin guide bar 19, be equipped with spout 1301 along the length direction of control lever on the lateral wall of control lever 13, locking round pin guide bar 19 and locking round pin 18 fixed connection can respectively set up a guide bar mounting hole that runs through with second through-hole 1801 in two relative sides of locking round pin 18 when the assembly, and two locking round pin guide bars 19 are installed in corresponding guide bar mounting hole with interference fit's mode. One end of the locking pin guide rod 19 is slidably matched in the sliding groove 1301, an inclined surface inclined with the cross section of the operating rod 13 is arranged in the sliding groove 1301, when one end of the locking pin 18 is inserted into the first through hole 501 in the upper supporting leg 5, the first stop piece 16 is pressed to enable the operating rod 13 to slide downwards, the inclined surface in the sliding groove 1301 is in contact with the locking pin guide rod 19 in the process, the locking pin 18 moves towards the direction far away from the first through hole 501 under the interaction of the locking pin guide rod 19 and the inclined surface, the locking pin 18 gradually separates from the first through hole 501, and unlocking sliding of the locking pin 18 is achieved. The locking subassembly still includes second reset spring 10, second reset spring 10 cover is established in the outside of locking round pin 18, the week side of locking round pin 18 is equipped with the annular arch, the one end and the protruding counterbalance of annular of second reset spring 10 link to each other, the other end with the inner wall of casing 12 offsets. When the support column is contracted to the shortest state, the locking pin 18 automatically enters the first through hole 501 under the elastic action of the second return spring 10, so that the upper and lower support legs 6 are in a locking state, and the support column is more convenient to use through the arranged second return spring 10.

Two pawl in the locking subassembly are installed back to back, and when the pawl in the locking subassembly was in the locking state with the ratchet, the pawl afterbody compressed tightly each other, and the torque that the effort produced of ratchet to the pawl head was offset each other by the effort and the reaction of pawl afterbody this moment, formed the internal force, just so avoided the pawl to produce the normal pressure to the ratchet to the requirement of leg on structural strength has been reduced, made whole locking pretension support column lightweight, the simplification.

The support column according to the embodiment of the utility model is further provided with a tensioning assembly consisting of a tensioning rod 20 and a tensioning spring 21, one end of the tensioning rod 20 is connected with the shell 12, the other end of the tensioning rod is connected with the upper end of the lower leg 6, the tensioning spring 21 is sleeved on the outer side of the tensioning rod 20, one end of the tensioning spring 21 abuts against the shell 12, and the other end of the tensioning spring 21 abuts against the lower leg 6. When the supporting column works, the tensioning assembly can play a role in pre-tightening and anti-loosening, and the stroke position of the supporting column has a certain buffering distance, so that the discrete locking characteristic of the pawl 11 and the ratchet bar 9 is adapted.

In some embodiments, the support shed further comprises a foot assembly rotatably connected to the lower end of the lower leg 6, the foot assembly being configured to rotate to the position shown in fig. 15 when the support post is moved from the retracted position to the extended position, such that the foot assembly is configured to increase the contact surface area, thereby preventing crushing of the contact surface and providing better support.

Referring to fig. 16-18, the foot assembly includes a foot body 22, a connecting plate 23, a foot-retracting slider 24, and a foot link 25. The connecting disc 23 is connected with the bottom foot body 22, and the connecting disc 23 is hinged with the lower end of the lower support leg 6 through a third rotating shaft 26. The side of the foot body 22 facing away from the connecting disc 23 can be designed to be a cambered surface or a spherical surface, and the surface is provided with the anti-skid nails 2201 to improve the contact performance and achieve the anti-skid effect. The lower leg 6 is provided with a slide rail 27, the foot-retracting slide block 24 is slidably arranged in the slide rail 27, and at least part of the foot-retracting slide block 24 is positioned at the outer side of the lower leg 6, so that the upper leg 5 can be in contact with the foot-retracting slide block 24. One end of the foot connecting rod 25 is hinged with the connecting disc 23 through a fourth rotating shaft 54, and the other end of the foot connecting rod is hinged with the foot retracting sliding block 24. Further, the foot-retracting slider 24 is composed of a slider body 2402 and a push plate 2401 which are connected, the slide rail 27 is arranged in the lower leg 6, the slider body 2402 is slidably arranged in the slide rail 27, and the push plate 2401 is positioned outside the lower leg 6. A notch 601 communicated with the slide rail 27 is formed on the side surface of the bottom of the lower supporting leg 6, and the push plate 2401 passes through the notch 601 and is fixed with the slider body 2402 in the slide rail 27.

In this embodiment, the foot assembly further includes a third return spring 28, a third return spring guide rod 29 and a second stop member 58, one end of the third return spring guide rod 29 penetrates through one end of the slide rail 27 along the length direction of the slide rail 27 and is connected with the foot closing slider 24, and the other end of the third return spring guide rod 29 is connected with the second stop member 58. The third return spring 28 is sleeved on the third return spring guide rod 29, and one end of the third return spring 28 abuts against the second stop member, and the other end abuts against one end of the slide rail 27.

When the supporting column is shortened to the shortest state, the bottom of the upper supporting leg 5 contacts with the push plate 2401 and pushes the push plate 2401 to slide downwards for a certain distance, the foot-retracting slider 24 connected with the push plate 2401 also slides downwards for a certain distance, the third return spring 28 is compressed under the action of the second stop piece 58, the foot-retracting slider 24, the foot connecting rod 25 and the connecting disc 23 are sequentially linked, so that the connecting disc 23 rotates around the third rotating shaft 26, and finally the foot body 22 is folded to the state shown in the figure. When the supporting column extends, the lower end of the lower leg 6 is separated from the push plate 2401, the second stop member 58 is pushed to move upwards under the action of the elastic force of the third return spring 28, the foot-retracting slider 24 connected with the second stop member through the third return spring guide rod 29 slides upwards, and the connecting disc 23 is pulled by the foot connecting rod 25 to rotate around the third rotating shaft 26, so that the foot body 22 rotates to the unfolded state.

The supporting shed frame provided by the utility model is light in structural design and easy to mount and dismount, the supporting efficiency of the rectangular roadway can be effectively improved, and meanwhile, automatic mounting and dismounting can be realized, so that the health of workers is guaranteed, the risk of the workers suffering from occupational diseases is reduced, and the number of people dying due to the occupational diseases is reduced.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited 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; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The utility model provides a strut rack with self-locking structure which characterized in that includes:

the top beam is suitable for abutting against the top of the roadway;

the first ends of the shoulder beams are rotatably connected with one end of the top beam, and the two shoulder beams are respectively connected with the two ends of the top beam;

the locking device comprises two supporting columns, a locking mechanism and a locking mechanism, wherein each supporting column comprises an upper supporting leg, a lower supporting leg and a locking assembly; the upper supporting leg is rotatably connected with the second end of the shoulder beam, and a ratchet bar is arranged on the inner wall surface of the upper supporting leg; the lower leg is slidably fitted in the upper leg along the length direction of the upper leg; said locking assembly being connected to said lower leg, said locking assembly including a pawl rotatable between an open position wherein said pawl engages said ratchet bar to lock said upper leg and said lower leg and a closed position wherein said pawl is disengaged from said ratchet bar;

the upper connecting boots are rotatably connected with the second ends of the shoulder beams, the upper connecting boots are positioned on the outer sides of the shoulder beams and the supporting columns, and the upper connecting boots are suitable for abutting against the side walls of the roadway.

2. The supporting shed frame with the self-locking structure as claimed in claim 1, further comprising a flexible mat provided on the top beam along a length direction of the top beam; the longitudinal section of the flexible pad is in an arch shape, and the thickness of the flexible pad is gradually reduced from the middle to two ends.

3. The supporting shed frame with the self-locking structure as claimed in claim 1, wherein the upper receiving boot includes an upper receiving portion and a connecting portion, the connecting portion is pivotally connected to the second end of the shoulder beam, and the upper receiving portion is provided with a barb.

4. The supporting shed frame with the self-locking structure of claim 1, wherein the locking assembly further comprises:

the shell is connected with the upper end of the lower supporting leg, at least part of the pawl is positioned in the shell, and the pawl is rotatably pivoted with the shell;

the connecting rod is positioned in the shell, and one end of the connecting rod is connected with the tail end of the pawl;

and one end of the operating rod is positioned in the shell, the other end of the operating rod is connected with the other end of the connecting rod, and the operating rod can slide along the length direction of the shell so as to drive the ratchet bar to rotate between the opening position and the closing position.

5. The supporting shed frame with the self-locking structure as claimed in claim 4, wherein the ratchet bars, the pawls and the connecting rods are all two and in one-to-one correspondence, the two ratchet bars are oppositely arranged on the inner wall surface of the upper supporting leg, and in the open position, the tail parts of the two pawls are pressed against each other; the locking assembly further comprises a first stop piece and a first return spring, the other end of the operating rod is located outside the shell and connected with the first stop piece, the first return spring is sleeved outside the operating rod, one end of the first return spring abuts against the outer wall surface of the shell, and the other end of the first return spring abuts against the first stop piece.

6. The supporting shed frame with the self-locking structure as claimed in claim 5, wherein the locking assembly further comprises a locking pin, the locking pin is connected with the operating lever and penetrates through the shell along the thickness direction of the shell, the locking pin is slidable along the thickness direction of the shell, a first through hole is formed in the lower end of the upper supporting leg, the locking pin is suitable for being matched with the first through hole so that the upper supporting leg and the lower supporting leg are relatively fixed, a second through hole is formed in the locking pin along the radial direction of the locking pin, the operating lever penetrates through the second through hole, and the size of the second through hole in the length direction of the locking pin is larger than that of the operating lever in the length direction of the locking pin; the locking assembly further comprises a locking pin guide rod, a sliding groove is formed in the side wall of the operating rod along the length direction of the operating rod, the locking pin guide rod is connected with the locking pin, and one end of the locking pin guide rod is slidably matched in the sliding groove; the locking subassembly still includes second reset spring, second reset spring cover is established the outside of locking round pin, the week side of locking round pin is equipped with the annular arch, second reset spring's one end with the protruding counterbalance of annular links to each other, the other end with the inner wall of casing offsets.

7. The supporting shed frame with the self-locking structure as claimed in claim 4, further comprising a tensioning assembly, wherein the tensioning assembly comprises a tensioning rod and a tensioning spring, one end of the tensioning rod is connected with the shell, the other end of the tensioning rod is connected with the upper end of the lower supporting leg, the tensioning spring is sleeved on the outer side of the tensioning rod, one end of the tensioning spring abuts against the shell, and the other end of the tensioning spring abuts against the lower supporting leg.

8. The support shed frame with the self-locking structure as recited in claim 1, further comprising a foot assembly rotatably connected to a lower end of the lower leg; the foot assembly includes:

a footing body;

the connecting disc is connected with the bottom foot body and is rotatably connected with the lower end of the lower supporting leg;

the foot closing sliding block is arranged on the lower supporting leg and can be arranged in the sliding rail in a sliding mode, and at least part of the foot closing sliding block is positioned on the outer side of the lower supporting leg, so that the upper supporting leg can be in contact with the foot closing sliding block;

and one end of the foot connecting rod is rotatably connected with the connecting disc, and the other end of the foot connecting rod is rotatably connected with the foot closing sliding block.

9. The supporting shed frame with the self-locking structure as claimed in claim 8, wherein the foot-retracting slider comprises a slider body and a push plate which are connected, the slide rail is arranged in the lower leg, the slider body is slidably arranged in the slide rail, and the push plate is positioned outside the lower leg.

10. The supporting shed frame with the self-locking structure as claimed in claim 8, wherein the foot assembly further comprises a third return spring, a third return spring guide rod and a second stop member, one end of the third return spring guide rod penetrates through one end of the slide rail along the length direction of the slide rail and is connected with the foot-receiving slide block, the other end of the third return spring guide rod is connected with the second stop member, the third return spring is sleeved on the third return spring guide rod, one end of the third return spring abuts against the second stop member, and the other end of the third return spring abuts against one end of the slide rail.