Trestle main body supporting structure

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a trestle body supporting structure which comprises a trestle body, a front lifting supporting device is arranged at the front end of the trestle body, and a trestle walking device is arranged at the rear end of the trestle body. A middle lifting supporting device is arranged at the position, corresponding to the position between the front lifting supporting device and the trestle walking device, of the trestle body. The front lifting supporting device comprises front fixing supporting legs symmetrically arranged on the two sides of the trestle body. Compared with the prior art, the structure of the front lifting supporting device is additionally provided with the second front movable supporting leg and the hydraulic oil cylinder for driving the second front movable supporting leg to ascend and descend, and the horizontal component force of the second front movable supporting leg to the trestle body support is opposite to the horizontal component force of the construction vehicle to the trestle when the construction vehicle walks in a full-load mode. Therefore, due to the arrangement of the second front movable supporting leg, the radial force borne by the first front movable supporting leg can be reduced, and then the first front movable supporting leg can be prevented from being damaged due to the fact that the radial force is too large.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a trestle main body supporting structure. Background Art

[0002] During the tunnel construction process, the existing trestles are mainly erected on the excavated ground to facilitate the construction workers to pass through and the construction vehicles to transport building materials over the trestles.

[0003] The existing trestle main body support structure has a front lifting leg arranged at the front end of the trestle main body, a trestle walking device arranged at the bottom of the rear end of the trestle main body, and a middle lifting leg that can move along the length direction of the trestle main body. For example, the self-propelled tunnel inverted arch steel arch frame construction trestle disclosed in the Chinese patent with publication number CN213574119U specifically discloses that the front lifting legs include lifting legs symmetrically arranged on both sides of the trestle main beam, and the bottom of the lifting legs is provided with an enlarged support. The lifting mechanism of the lifting legs is a hydraulic cylinder. Specifically, the lifting legs include a fixed leg and a movable leg, the fixed leg is fixedly connected to the trestle main beam, and the relative position between the fixed leg and the movable leg is adjusted by the hydraulic cylinder. However, during the use of this trestle, the front lifting legs are prone to tilting or even deformation (the movable leg is correspondingly deflected toward the rear end of the trestle, and the connection between the fixed leg and the trestle is loose).

[0004] After analysis, we found that when the construction vehicle is fully loaded (generally moving from the rear end to the front end of the trestle), the force on the trestle is at its maximum, and the direction of the horizontal component of the construction vehicle on the trestle is from the front end to the rear end of the trestle; the vibration of the construction vehicle during operation causes the connection between the fixed legs and the trestle to loosen. For this reason, we redesigned a trestle main support structure. Utility Model Content

[0005] In order to overcome the deficiencies in the background technology, the utility model discloses a trestle main body supporting structure.

[0006] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0007] A trestle main body support structure, comprising a trestle main body, a front lifting support device is provided at the front end of the trestle main body, a trestle walking device is provided at the rear end of the trestle main body, a middle lifting support device is provided at a position corresponding to the position between the front lifting support device and the trestle walking device, the front lifting support device comprises front fixed legs symmetrically arranged on both sides of the trestle main body, a first front movable leg and a second front movable leg correspondingly located behind the first front movable leg are provided at the bottom of the front fixed leg, and the second front movable leg is inclined up and down, and the lower end of the second front movable leg is correspondingly located behind the upper end thereof;

[0008] The front lifting support device also includes a hydraulic cylinder for driving the first front movable leg and the second front movable leg to lift.

[0009] Preferably, a U-shaped vibration-damping space is provided on the inner side surface of the front fixed leg, and both side walls of the U-shaped vibration-damping space are correspondingly connected to the trestle body.

[0010] Preferably, both side walls of the trestle bridge body are provided with track beams, and the middle lifting support device has a rolling component rolled on the top and bottom surfaces of the track beams.

[0011] Preferably, the middle lifting support device comprises an H-shaped fixed leg, and both side walls of the U-shaped cavity on the H-shaped fixed leg are provided with rolling components; and both side walls of the U-shaped cavity under the H-shaped fixed leg are provided with a middle movable leg at the bottom;

[0012] The middle lifting support device also includes a hydraulic cylinder for driving the middle movable support leg to lift.

[0013] Preferably, the rolling assembly includes an upper mounting plate and a lower mounting plate, the middle parts of the upper mounting plate and the lower mounting plate are hinged to the corresponding U-shaped cavity side walls on the H-shaped fixed legs, and upper rollers rolling on the top surface of the track beam are provided at both ends of the upper mounting plate; lower rollers rolling on the bottom surface of the track beam are provided at both ends of the lower mounting plate.

[0014] Preferably, the middle movable leg has branch legs on both the front and rear sides of the bottom.

[0015] Preferably, the H-shaped fixed leg belly rotating sleeve is provided with a middle part of the mounting beam, and both ends of the mounting beam are provided with top pressure wheels rolling on the bottom surface of the trestle body.

[0016] Preferably, a rolling groove is provided in the middle of the bottom surface of the trestle body.

[0017] Preferably, it also includes an X-shaped connecting beam, wherein the upper two ends of the X-shaped connecting beam are respectively fixedly connected to the corresponding fixed legs; and the lower two ends of the X-shaped connecting beam are respectively connected to the corresponding movable legs in an up-and-down sliding manner.

[0018] Preferably, the bottom of the movable leg has a pad.

[0019] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0020] 1. Compared with the prior art, the structure of the front lifting support device is increased by a second front movable leg and a hydraulic cylinder for driving the second front movable leg to lift. The horizontal component of the force supported by the second front movable leg on the main body of the trestle is opposite to the horizontal component of the force exerted by the construction vehicle on the trestle when the construction vehicle is fully loaded (generally walking from the rear end to the front end of the trestle). Therefore, the setting of the second front movable leg can reduce the radial force exerted on the first front movable leg, thereby preventing the first front movable leg from being damaged due to excessive radial force.

[0021] 2. The setting of the U-shaped vibration reduction space is changed to a two-point fitting connection, compared with the surface fitting connection between the front fixed legs and the trestle body in the prior art, so that the existence of the U-shaped vibration reduction space can reduce the vibration and buffer the contact stress between the front fixed legs and the trestle body, prevent the front fixed legs from being deformed due to the lateral vibration force generated by the walking of the construction vehicle, and increase the stability of the combination of the front fixed legs and the trestle body;

[0022] 3. The setting of the rolling assembly can enable the corresponding rollers to rise and fall adaptively at the uneven positions of the track beam, so that the rollers can pass over the uneven positions of the track beam, or the uneven positions of the track beam can pass through the rollers, to prevent the middle lifting support device from getting stuck at the uneven positions of the track beam, or even cause the middle lifting support device to tilt when the main body of the trestle is moved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a left view of the utility model;

[0025] Figure 3 for Figure 1 A local enlarged view of I in FIG.

[0026] Figure 4 for Figure 1 Partial enlarged view of II in the figure;

[0027] Figure 5 It is a cross-sectional view of the middle lifting support device of the utility model.

[0028] In the figure: 1. trestle body; 11. track beam; 12. rolling groove; 2. front lifting support device; 21. front fixed leg; 211. U-shaped vibration reduction space; 22. first front movable leg; 23. second front movable leg; 3. trestle walking device; 4. middle lifting support device; 41. rolling assembly; 411. upper mounting plate; 412. lower mounting plate; 413. upper roller; 414. lower roller; 42. H-shaped fixed leg; 43. middle movable leg; 431. branch leg; 44. mounting beam; 45. top pressure wheel; 5. X-shaped connecting beam; 6. pad. DETAILED DESCRIPTION

[0029] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. to indicate directions or positional relationships, they only correspond to the drawings of the present application, in order to facilitate the description of the present invention; it should be understood that if there are terms such as "end", "side", "end part", "lateral", "lateral", "transverse", "longitudinal", etc. to indicate directions or positional relationships, they only correspond to the length and width of the corresponding parts, that is, "end part" indicates the head and tail areas in the length direction of the corresponding part, and "side part" indicates the head and tail areas in the width direction of the corresponding part; this is for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0030] Embodiment 1, in combination with the attached Figure 1-3 A pier main body support structure includes a pier main body 1, a front lifting support device 2 is provided at the front end of the pier main body 1, a pier walking device 3 is provided at the rear end of the pier main body 1, and a middle lifting support device 4 is provided at a position between the front lifting support device 2 and the pier walking device 3 of the pier main body 1; it can be imagined that the pier main body 1 should also have a driving device for driving the middle lifting support device 4 to move along the length direction of the pier main body 1; according to needs, the driving device can be implemented by means of a motor driving device, a cylinder driving device, a hydraulic driving device, a pulling device device, etc. in the prior art, and no specific limitation is made here. The front lifting support device 2 includes front fixed legs 21 symmetrically arranged on both sides of the pier main body 1, and a first front movable leg 22 and a second front movable leg 23 correspondingly located behind the first front movable leg 22 are provided at the bottom of the front fixed leg 21, and the second front movable leg 23 is inclined up and down, and the lower end of the second front movable leg 23 is correspondingly located behind its upper end;

[0031] As required, the first front movable leg 22 can be arranged vertically or up and down. When the first front movable leg 22 is arranged to be tilted up and down, the tilting direction of the first front movable leg 22 is the same as the tilting direction of the second front movable leg 23.

[0032] It should be noted that the lifting and lowering of the movable leg is movement along its axial direction. For example, the lifting and lowering of the second front movable leg 23 is not a vertical upward movement, but the second front movable leg 23 can move along its axial direction, so that the upper and lower positions of the second front movable leg 23 change.

[0033] The front lifting support device 2 also includes a hydraulic cylinder for driving the first front movable leg 22 and the second front movable leg 23 to lift and lower. Specifically, the hydraulic cylinder is not specifically one, and is also set according to actual needs. In other words, the lifting and lowering of the first front movable leg 22 is achieved by driving the hydraulic cylinder, and the lifting and lowering of the second front movable leg 23 is achieved by driving the hydraulic cylinder.

[0034] When the first front movable leg 22 is set vertically, the structure of the front lifting support device 2 is increased by the second front movable leg 23 and the hydraulic cylinder for driving the second front movable leg 23 to rise and fall compared with the prior art. The horizontal component of the force supported by the second front movable leg 23 on the trestle body 1 is opposite to the horizontal component of the force exerted by the construction vehicle on the trestle when the construction vehicle is fully loaded (generally walking from the rear end to the front end of the trestle). Therefore, the setting of the second front movable leg 23 can reduce the radial force exerted on the first front movable leg 22, thereby preventing the first front movable leg 22 from being damaged due to excessive radial force.

[0035] When the first front movable leg 22 is also tilted up and down, the horizontal force component of the first front movable leg 22 supporting the trestle body 1 is opposite to the horizontal force component of the construction vehicle on the trestle when the construction vehicle is walking unloaded (generally walking from the front end to the rear end of the trestle). Therefore, preferably, the first front movable leg 22 is also tilted up and down.

[0036] As required, pads 6 are provided at the bottom of the first front movable leg 22 and the bottom of the second front movable leg 23 to increase the contact surface with the ground.

[0037] Embodiment 2, combined with the attached Figure 3 A pier main body supporting structure, based on the first embodiment, a U-shaped vibration reduction space 211 is provided on the inner side of the front fixed leg 21, and both side walls of the U-shaped vibration reduction space 211 are correspondingly connected to the pier main body 1; specifically, the U-shaped vibration reduction space 211 passes through the front fixed leg 21 along the front and rear direction of the pier main body 1.

[0038] Compared with the surface-fitting connection between the front fixed leg 21 and the trestle body 1 in the prior art, this arrangement is changed to a fitting connection at two points, so that the existence of the U-shaped vibration-damping space 211 can dampen the contact stress between the front fixed leg 21 and the trestle body 1, prevent the front fixed leg 21 from being deformed due to the lateral vibration force generated by the movement of the construction vehicle, or prevent the connection between the front fixed leg 21 and the trestle body 1 from becoming loose, thereby increasing the stability of the combination of the front fixed leg 21 and the trestle body 1.

[0039] Embodiment 3, in combination with the attached Figure 3-5A trestle main body support structure, based on the first or second embodiment, the middle lifting support device 4 includes an H-shaped fixed leg 42, and both side walls of the U-shaped cavity on the H-shaped fixed leg 42 are provided with a rolling assembly 41; the bottom of both side walls of the U-shaped cavity under the H-shaped fixed leg 42 is provided with a middle movable leg 43;

[0040] The middle lifting support device 4 also includes a hydraulic cylinder for driving the middle movable support leg 43 to rise and fall.

[0041] Track beams 11 are disposed on both side walls of the trestle body 1 , and the rolling assembly 41 rolls on the top surface or the bottom surface of the track beam 11 .

[0042] The rolling assembly 41 includes an upper mounting plate 411 and a lower mounting plate 412. The middle parts of the upper mounting plate 411 and the lower mounting plate 412 are hinged to the corresponding U-shaped cavity side walls on the H-shaped fixed legs 42. The upper mounting plate 411 has upper rollers 413 rolled on the top surface of the track beam 11 at both ends; the lower mounting plate 412 has lower rollers 414 rolled on the bottom surface of the track beam 11 at both ends.

[0043] With such arrangement, since the two upper rollers 413 can swing up and down under the action of the upper mounting plate 411, and the two lower rollers 414 can swing up and down under the action of the lower mounting plate 412, when the track beam 11 is in an uneven position (due to manufacturing tolerance, installation tolerance, etc.), the corresponding mounting plate can be rotated to make the rollers swing upward or downward to pass over the uneven position of the track beam 11, thereby preventing the middle lifting support device 4 and the track beam 11 from getting stuck at an uneven position, or even causing the middle lifting support device 4 to tilt when the trestle body 1 is moved.

[0044] As required, in order to increase the contact surface between the middle movable leg 43 and the ground and the front-to-back dimensions, the middle movable leg 43 has branch legs 431 on both the front and back sides of the bottom.

[0045] As required, the bottom surface of the middle movable leg 43 and the bottom surface of the branch leg 431 can be provided with a pad 6 to increase the contact surface with the ground.

[0046] As needed, in order to increase the front-to-rear dimension of contact between the middle movable leg 43 and the pier body 1, a rotating sleeve is provided on the belly of the H-shaped fixed leg 42 in the middle of a mounting beam 44, and both ends of the mounting beam 44 are provided with top pressure wheels 45 rolled on the bottom surface of the pier body 1; further, a rolling groove 12 is provided in the middle of the bottom surface of the pier body 1.

[0047] Embodiment 4, in combination with the attached Figure 4-5A trestle main body supporting structure, based on any one of embodiments one to three, in order to further increase the strength of the front lifting support device 2, further includes an X-shaped connecting beam 5, wherein the upper two end portions of the X-shaped connecting beam 5 are respectively fixedly connected to the two front fixed legs 21; the lower two end portions of the X-shaped connecting beam 5 are respectively connected to the corresponding first front movable legs 22 or the second front movable legs 23 for up and down sliding; it should be noted that the up and down sliding here is an axial sliding along the corresponding front movable legs; that is, when the front movable legs are raised or lowered, the lower two end portions of the X-shaped connecting beam 5 slide and cooperate with the corresponding front movable legs.

[0048] Furthermore, the middle lifting support device 4 also has an X-shaped connecting beam 5, and the upper two ends of the X-shaped connecting beam 5 are respectively fixedly connected to the two side walls of the n-shaped cavity under the H-shaped fixed support leg 42; the lower two ends of the X-shaped connecting beam 5 are respectively connected to the two middle movable support legs 43 for upward and downward sliding.

[0049] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A trestle main body support structure, comprising a trestle main body (1), wherein the front end of the trestle main body (1) is provided with a front lifting support device (2), the rear end of the trestle main body (1) is provided with a trestle walking device (3), and the trestle main body (1) is provided with a middle lifting support device (4) at a position corresponding to the position between the front lifting support device (2) and the trestle walking device (3), characterized in that: The front lifting support device (2) comprises front fixed legs (21) symmetrically arranged on both sides of the trestle body (1); a first front movable leg (22) and a second front movable leg (23) correspondingly located behind the first front movable leg (22) are arranged at the bottom of the front fixed leg (21); the second front movable leg (23) is inclined up and down, and the lower end of the second front movable leg (23) is correspondingly located behind the upper end thereof; The front lifting support device (2) also includes a hydraulic cylinder for driving the first front movable support leg (22) and the second front movable support leg (23) to lift and lower.

2. A trestle main body support structure according to claim 1, characterized in that: A U-shaped vibration reduction space (211) is provided on the inner side of the front fixed support leg (21), and both side walls of the U-shaped vibration reduction space (211) are correspondingly connected to the trestle body (1).

3. The main support structure of a trestle according to claim 1, characterized in that: Both side walls of the trestle bridge body (1) are provided with track beams (11), and the middle lifting support device (4) has a rolling component (41) rolled on the top surface and the bottom surface of the track beam (11).

4. A trestle main body support structure according to claim 3, characterized in that: The middle lifting support device (4) comprises an H-shaped fixed leg (42), and both side walls of the U-shaped cavity on the H-shaped fixed leg (42) are provided with a rolling assembly (41); and both side walls of the U-shaped cavity below the H-shaped fixed leg (42) are provided with a middle movable leg (43); The middle lifting support device (4) also includes a hydraulic cylinder for driving the middle movable support leg (43) to lift and lower.

5. A trestle main body support structure according to claim 4, characterized in that: The rolling assembly (41) comprises an upper mounting plate (411) and a lower mounting plate (412); the middle portions of the upper mounting plate (411) and the lower mounting plate (412) are hinged to the side walls of the U-shaped cavities on the corresponding H-shaped fixed legs (42); upper rollers (413) are provided at both ends of the upper mounting plate (411) for rolling on the top surface of the track beam (11); and lower rollers (414) are provided at both ends of the lower mounting plate (412) for rolling on the bottom surface of the track beam (11).

6. A trestle main body supporting structure according to claim 4, characterized in that: The middle movable supporting leg (43) has branch legs (431) on both the front and rear sides of the bottom.

7. The main support structure of a trestle bridge according to claim 4, characterized in that: The middle part of the mounting beam (44) is rotatably sleeved on the belly of the H-shaped fixed support leg (42), and both ends of the mounting beam (44) are provided with pressing wheels (45) that roll on the bottom surface of the trestle body (1).

8. A trestle main body supporting structure according to claim 7, characterized in that: A rolling groove (12) is provided in the middle of the bottom surface of the trestle body (1).

9. A trestle main body support structure according to claim 1 or 4, characterized in that: It also comprises an X-shaped connecting beam (5), wherein the upper two ends of the X-shaped connecting beam (5) are respectively fixedly connected to corresponding fixed legs; and the lower two ends of the X-shaped connecting beam (5) are respectively connected to corresponding movable legs in an up-and-down sliding manner.

10. A trestle main body supporting structure according to claim 1 or 4, characterized in that: The bottom of the movable leg is provided with a pad (6).

Images