Height-adjustable unloading block for high-speed railway bridge construction

Abstract

The utility model belongs to the technical field of unloading blocks, and provides a height-adjustable unloading block for high-speed railway bridge construction, which comprises an upper support, a lower support and two side supports, the two side supports are slidably connected between the upper support and the lower support, second sliding chutes are arranged on slopes symmetrically arranged at two ends of the upper side surface of the lower support, and the second sliding chutes are arranged on the slopes symmetrically arranged at two ends of the upper side surface of the lower support. A height adjusting structure capable of driving the two side supports to move at the same time is arranged in the second sliding groove, the top between the side supports is slidably connected to the lower side face of the upper support, a penetrating opposite-pull screw rod is arranged between the two side supports, and the two ends of the opposite-pull screw rod are provided with opposite-pull nuts in threaded connection; the side supports on the two sides are installed on the height adjusting structure, the side supports on the two sides can ascend at the same time when the height is adjusted, and working time is saved; by rotating the split nuts on the two sides, the height of the upper support is adjusted, the stability of the side supports 2 can be kept, looseness is not prone to occurring, and the use stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of unloading blocks, in particular to a height-adjustable unloading block for high-speed railway bridge construction. Background Art

[0002] The unloading block is a device specially used for bridge construction. It is mainly used for the elevation adjustment and unloading of bridge supports. The bridge supports need to be cast during bridge construction. The supports need to be supported and fixed during casting. A forming frame is set at the bottom of the support. Generally, an unloading block is set between the forming frame and the bridge. The forming frame is reinforced with the unloading block to ensure the quality of the support forming.

[0003] The utility model with the authorization announcement number CN218540442U discloses a reinforced bridge support unloading block, including a lower support, a left support is arranged on the left side of the top of the lower support, a right support is arranged on the right side of the top of the lower support, an upper support is arranged on the top between the left support and the right support, and the two sides of the top of the lower support are connected with lower slides, and the two sides of the bottom of the upper support are connected with upper slides. The reinforced bridge support unloading block is provided with an upper support, a reinforcement plate, a chute and a guide block. When in use, when the upper support moves upward, the reinforcement plate will also move upward accordingly, the reinforcement plate keeps the upward movement state, the guide block position remains unchanged, and the chute moves vertically at the guide block to ensure the stability of the upper support moving upward, not easy to deviate, and not suspended in the middle. At the same time, the upper support can be supported and reinforced, which increases the compressive resistance of the upper support, and solves the problem of not having a support reinforcement structure during the adjustment process. However, the utility model is troublesome to operate when it needs to be raised, and the supports on both sides cannot be raised at the same time, which wastes time. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a height-adjustable unloading block for high-speed railway bridge construction, which solves the problems raised in the above-mentioned background technology.

[0005] The technical solution of this utility model is as follows:

[0006] A height-adjustable unloading block for high-speed railway bridge construction comprises an upper support, a lower support and two side supports, the two side supports are slidably connected between the upper support and the lower support, second slide grooves are arranged on the slopes symmetrically arranged at both ends of the upper side surface of the lower support, a height adjustment structure capable of driving the two side supports to move simultaneously is arranged in the second slide groove, the top of the side support is slidably connected to the lower side surface of the upper support, a through-drawing screw is arranged between the two side supports, and threaded drawing nuts are arranged at both ends of the drawing screw.

[0007] Furthermore, first sliding blocks are provided on the slopes symmetrically arranged at the two ends of the lower side of the upper support, and the first sliding grooves opened on the upper end surfaces of the side supports are slidably connected to the first sliding blocks.

[0008] Furthermore, a cavity is provided inside the lower support, and the cavity is communicated with the second slide groove.

[0009] Furthermore, the height adjustment structure includes a screw, a first bevel gear, a guide screw and a second bevel gear. An inclined screw is rotatably connected in the second slide groove. One end of the screw located in the cavity is fixedly connected to the first bevel gear. A horizontal guide screw is rotatably connected in the cavity. Both ends of the guide screw are fixedly connected to the second bevel gear. The first bevel gear and the second bevel gear are meshed and rotated.

[0010] Furthermore, a second sliding block is fixedly connected to the lower end surface of the side support seat, and a threaded hole is provided on the side surface of the second sliding block, and the threaded hole is threadedly connected to a screw rod.

[0011] Furthermore, a worm wheel is fixedly connected to the middle of the lead screw, and a worm meshing with the worm wheel is provided on the lower side of the worm wheel.

[0012] Furthermore, the worm is provided with a rotating hole for inserting the rotating handle.

[0013] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects: by installing the side supports on both sides on the height adjustment structure, the side supports on both sides can be raised at the same time when adjusting the height, saving working time; by rotating the tension nuts on both sides, not only the height of the upper support can be adjusted, but also the stability of the side support 2 can be maintained, which is not easy to loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the height-adjustable unloading block for high-speed railway bridge construction of the utility model;

[0015] Figure 2 It is a cross-sectional view of a height-adjustable unloading block for high-speed railway bridge construction of the utility model;

[0016] Figure 3 is a structural schematic diagram of the lower support;

[0017] Figure 4 It is a structural schematic diagram of the side support;

[0018] In the figure: 1, upper support, 101, first slider, 2, side support, 21, second slider, 22, first slide groove, 23, threaded hole, 3, lower support, 31, second slide groove, 4, tension screw, 5, tension nut, 6, slot, 7, screw, 8, first bevel gear, 9, guide screw, 10, second bevel gear, 11, worm, 12, rotating hole, 13, worm wheel, 14, groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 A height-adjustable unloading block for high-speed railway bridge construction comprises an upper support 1, a lower support 3 and two side supports 2, the two side supports 2 are slidably connected between the upper support 1 and the lower support 3, second slide grooves 31 are arranged on the slopes symmetrically arranged at both ends of the upper side surface of the lower support 3, and a height adjustment structure capable of driving the two side supports 2 to move simultaneously is arranged in the second slide groove 31, the top of the side support 2 is slidably connected to the lower side surface of the upper support 1, a through-drawing screw 4 is arranged between the two side supports 2, and threaded drawing nuts 5 are arranged at both ends of the drawing screw 4.

[0021] Specifically, a plurality of grooves 14 are provided on the upper surface of the upper support 1 and the lower surface of the lower support 3. Transverse reinforcing ribs and longitudinal reinforcing ribs are formed between the two grooves 14 and are staggered to improve the overall stability. The two side supports 2 are provided with through holes for the tension screws 4 to penetrate. The outer surfaces of the tension nuts 5 are provided with strip-shaped anti-slip grooves to enhance the friction during rotation and prevent slipping. When the height of the upper support 1 is adjusted to the right position, the tension nuts 5 on both sides are rotated to keep the tension nuts 5 in contact with the sides of the side supports 2, thereby limiting the two side supports 2 to prevent the side supports 2 from moving when the upper support 1 is under pressure, thereby effectively maintaining the stability of the two side supports 2.

[0022] like Figure 3 As shown, a first slider 101 is provided on the slopes symmetrically arranged at the two ends below the upper support 1, a first slide groove 22 opened on the upper end surface of the side support 2 is slidably connected to the first slider 101, the size of the first slider 101 is consistent with the size of the first slide groove 22, and the first slider 101 is welded at the middle position on the slope.

[0023] like Figure 2As shown, a cavity is provided inside the lower support 3 , and the cavity is communicated with the second slide groove 31 .

[0024] like Figure 2 As shown, the height adjustment structure includes a screw 7, a first bevel gear 8, a guide screw 9 and a second bevel gear 10. The second slide groove 31 is rotatably connected with an inclined screw 7. One end of the screw 7 located in the cavity is fixedly connected to the first bevel gear 8. A horizontal guide screw 9 is rotatably connected in the cavity. Both ends of the guide screw 9 are fixedly connected to the second bevel gear 10. The first bevel gear 8 rotates in meshing with the second bevel gear 10.

[0025] Specifically, the guide screw 9 is a rotating rod, which is rotatably connected to the inner wall of the cavity. Both ends of the guide screw 9 are keyed to the second bevel gear 10. One end of the screw 7 is inserted into the bearing in the side wall of the second slide groove 31, and the other end is extended into the cavity and fixedly connected to the first bevel gear 8 at the end. The second bevel gear 10 not only rotates in coordination with the first bevel gear 8, but also serves as a support for the other end of the screw 7.

[0026] like Figure 4 As shown, a second sliding block 21 is fixedly connected to the lower end surface of the side support 2 , and a threaded hole 23 is formed on the side surface of the second sliding block 21 , and the threaded hole 23 is threadedly connected to the screw rod 7 .

[0027] Specifically, the cross-section of the front view of the second slider 21 is a parallelogram, and the lower bottom surface fits into the bottom wall of the second slide groove 31. The inclination angle of the threaded hole 23 is consistent with the inclination angle of the screw 7. The internal threads of the threaded holes 23 arranged in the second sliders 21 on both sides rotate in opposite directions. When the screws 7 on both sides rotate, the supports 2 on both sides can move towards or away from each other at the same time to raise or lower the upper support 1.

[0028] like Figure 2 As shown, the guide screw 9 is fixedly connected to a worm wheel 13 in the middle, and a worm 11 meshing with the worm wheel 13 is provided on the lower side thereof.

[0029] Specifically, a worm wheel 13 is welded in the middle of the rotating rods on both sides, a meshing worm 11 is placed horizontally under the worm wheel 13, and support rods are welded at both ends of the worm 11 and inserted into bearings in the front and rear side walls of the cavity to support the worm 11.

[0030] like Figure 2 As shown, the worm 11 is provided with a rotating hole 12 for inserting a rotating handle. The rotating hole 12 is an inner square, inner hexagonal or inner pentagonal structure, and the end of the rotating handle is an outer square, outer hexagonal or outer pentagonal structure consistent with the shape of the rotating hole 12.

[0031] Specifically, a slot 6 is provided on the lower support 3, and the position of the slot 6 corresponds to the rotating hole 12. The slot 6 is connected to the rotating hole 12, and the length of the rotating handle can be inserted into the slot 6. When the height of the upper support 1 needs to be adjusted, the rotating handle only needs to be rotated clockwise or counterclockwise.

[0032] The working process of the height-adjustable unloading block for high-speed railway bridge construction provided by the utility model is as follows:

[0033] In the initial state before use, the two side supports 2 are located at the leftmost end of the lower support 3, the corresponding tension nuts 5 are located at the end of the tension screws 4, and the tension nuts 5 are tightly fitted on the outer side of the side supports 2. At this time, the upper support 1 is at the lowest position;

[0034] When using the unloading block, install the unloading block in place. When the height of the unloading block needs to be adjusted according to the situation, insert the rotating handle into the rotating hole 12, rotate the rotating handle clockwise, the worm 11 rotates to drive the worm wheel 13 to rotate, the worm wheel 13 drives the guide screw 9 to rotate, the guide screw 9 drives the second bevel gear 10 thereon to rotate, the second bevel gear 10 drives the first bevel gear 8 meshing therewith to rotate, the first bevel gear 8 drives the screw 7 fixedly connected thereto to rotate, the screw 7 drives the side support 2 to move to the middle of the lower support 3 through the second slider 21, and drives the upper support 1 to rise during the middle movement of the side support 2 to the lower support 3. When the upper support 1 is raised into place, stop rotating the rotating handle, and then rotate the tension nut 5 on the tension screw 4 to move toward the middle and finally abut against the outer surface of the side support 2.

[0035] When it is necessary to lower the upper support, first rotate the tension nut 5 to only pull the end of the screw rod, then insert the rotating handle into the worm 11 and rotate it counterclockwise to drive the side support 2 to move to the two ends of the lower support 3. The upper support 1 moves downward under the action of gravity. When the upper support 1 is lowered into place, stop turning the rotating handle, and rotate the tension nut 5 again to the outer side of the side support 2, so as to strengthen the fixed limit of the two side supports 2.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A height-adjustable unloading block for high-speed railway bridge construction, comprising an upper support (1), a lower support (3) and two side supports (2), characterized in that: The two side supports (2) are slidably connected between the upper support (1) and the lower support (3); a second slide groove (31) is provided on the slopes symmetrically arranged at both ends of the upper side surface of the lower support (3); a height adjustment structure capable of driving the two side supports (2) to move simultaneously is provided in the second slide groove (31); the top of the side support (2) is slidably connected to the lower side surface of the upper support (1); a tension screw (4) is provided through the two side supports (2); and threaded tension nuts (5) are provided at both ends of the tension screw (4).

2. The height-adjustable unloading block for high-speed railway bridge construction according to claim 1 is characterized in that: A first sliding block (101) is provided on the slopes symmetrically arranged at the two ends of the lower side of the upper support (1), and a first sliding groove (22) provided on the upper end surface of the side support (2) is slidably connected to the first sliding block (101).

3. The height-adjustable unloading block for high-speed railway bridge construction according to claim 2 is characterized in that: The lower support (3) is provided with a cavity inside, and the cavity is communicated with the second sliding groove (31).

4. The height-adjustable unloading block for high-speed railway bridge construction according to claim 1 is characterized in that: The height adjustment structure comprises a screw (7), a first bevel gear (8), a guide screw (9) and a second bevel gear (10); the second slide groove (31) is rotatably connected with an inclined screw (7); one end of the screw (7) located in the cavity is fixedly connected to the first bevel gear (8); a transverse guide screw (9) is rotatably connected in the cavity; both ends of the guide screw (9) are fixedly connected to the second bevel gear (10); the first bevel gear (8) and the second bevel gear (10) are meshed and rotatable.

5. The height-adjustable unloading block for high-speed railway bridge construction according to claim 4 is characterized in that: A second sliding block (21) is fixedly connected to the lower end surface of the side support seat (2), a threaded hole (23) is provided on the side surface of the second sliding block (21), and the threaded hole (23) is threadedly connected to the screw rod (7).

6. The height-adjustable unloading block for high-speed railway bridge construction according to claim 4 is characterized in that: The middle of the lead screw (9) is fixedly connected to a worm wheel (13), and a worm (11) meshing with the worm wheel (13) is provided on the lower side of the worm wheel (13).

7. The height-adjustable unloading block for high-speed railway bridge construction according to claim 6 is characterized in that: The worm (11) is provided with a rotating hole (12) for inserting a rotating handle.

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