Shield beam and hydraulic support

Abstract

The utility model discloses a shield beam and a hydraulic support, and relates to the technical field of coal mining, the shield beam and the hydraulic support comprise a beam plate and a linkage plate sliding in the vertical direction of the beam plate, and a driving toothed plate is fixed on one side, close to the beam plate, of the linkage plate; an extending plate sliding in the parallel direction of the beam plate is inserted into one side of the beam plate, and a follow-up toothed plate parallel to the extending plate is fixed to the end, located in the beam plate, of the extending plate. A first gear meshed with the driving toothed plate and a second gear meshed with the follow-up toothed plate are rotationally arranged in the beam plate, wherein the first gear and the second gear are fixed to the same shaft and are meshed with the driving toothed plate. The diameter of the second gear is 3-4 times that of the first gear. The diameter of the second gear is 3-4 times that of the first gear, so that the extending distance of the extending plate from the interior of the beam plate is 3-4 times that of the descending distance of the linkage plate, and even if the descending distance of the linkage plate is limited, the extending plate can extend for a long distance to complete pressing with the other extending plate. And the stroke of the linkage plate is small, so that the overall size of the shield beam is smaller, and carrying is convenient.

Description

Technical Field

[0001] This utility model relates to the field of coal mining technology, specifically to a shield beam and hydraulic support. Background Technology

[0002] During underground coal mining, as the coal seam is mined, the roof rock may collapse due to loss of support. A crucial function of the shield beam is to prevent rockfall from entering the coal face, providing a safe working space for underground workers and equipment. Located between the coal face and the roof, it acts as a barrier, preventing rockfall from directly impacting mining equipment and personnel.

[0003] Although the protective beams can block the waste rock, gaps inevitably exist between the two protective beams during installation, allowing small pieces of waste rock to fall through. To address this issue, existing protective beams typically have a linkage plate at their top. When the linkage plate is compressed, the telescopic plates on the side of the protective beam extend and retract outwards via several transmission balls, pressing tightly against the telescopic plate of the other protective beam. However, the top space of the protective beam is limited, making it difficult to install a linkage plate with a long stroke. Furthermore, a long stroke of the linkage plate would result in a large overall size of the protective beam, making it inconvenient to carry. Therefore, this invention designs a protective beam and hydraulic support to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a protective beam and a hydraulic support.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A shield beam includes a beam plate and a linkage plate that slides vertically thereon, wherein a drive tooth plate is fixed to the side of the linkage plate near the beam plate.

[0007] A protruding plate that slides in a parallel direction is inserted into one side of the beam plate, and a follower toothed plate that is parallel to the protruding plate is fixed at one end of the protruding plate inside the beam plate.

[0008] The beam plate has a gear 1 fixed on the same shaft that meshes with the drive gear plate and a gear 2 that meshes with the follower gear plate. The diameter of the gear 2 is 3-4 times the diameter of the gear 1.

[0009] When the linkage plate is squeezed, the drive gear plate moves along the vertical direction of the beam plate, causing gear one and gear two to rotate coaxially. The rotation of gear two causes the follower gear plate to move along the parallel direction of the beam plate.

[0010] Preferably, the diameter of the second gear is 3.5 times the diameter of the first gear.

[0011] Preferably, a limiting cavity is provided on the beam plate, and an inverted "T"-shaped guide post is fixed on the side of the linkage plate near the drive tooth plate, with one end inserted into the limiting cavity.

[0012] Preferably, a return spring is installed at one end of the inverted "T"-shaped guide post located inside the limiting cavity to press the inverted "T"-shaped guide post outward.

[0013] Preferably, a hydraulic support includes the aforementioned hydraulic support shield beam, and the hydraulic support shield beam is further provided with connecting rods and hydraulic drive components.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] Since the diameter of gear two is 3-4 times that of gear one, the extension plate extends 3-4 times the distance the linkage plate descends from inside the beam. Even if the descent distance of the linkage plate is limited, the extension plate can still extend a longer distance to complete the clamping with the other extension plate. Moreover, the smaller stroke of the linkage plate makes the overall size of the shield beam smaller and easier to carry. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0017] Figure 1 This is a schematic diagram of the structure of a protective beam according to the present invention;

[0018] Figure 2 This utility model Figure 1 Enlarged view of section A;

[0019] Figure 3 This is a cross-sectional view of a protective beam according to the present invention;

[0020] Figure 4 This utility model Figure 3 Enlarged view of section B.

[0021] The diagram is labeled as follows: 1. Beam plate; 101. Limiting cavity; 2. Linkage plate; 3. Inverted "T" shaped guide column; 4. Reset spring; 5. Drive gear plate; 6. Gear one; 7. Gear two; 8. Extending plate; 9. Follower gear plate. Detailed Implementation

[0022] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0023] Example

[0024] like Figure 1-4 As shown, a shield beam includes a beam plate 1 and a linkage plate 2 that slides in its vertical direction;

[0025] The linkage plate 2 is fixed with a drive tooth plate 5 on the side near the beam plate 1, and the drive tooth plate 5 is provided with teeth along the vertical direction of the beam plate 1.

[0026] A protruding plate 8 that slides in parallel direction is inserted into one side of the beam plate 1. A follower toothed plate 9 that is parallel to the protruding plate 8 is fixed at one end of the protruding plate 8 inside the beam plate 1. The follower toothed plate 9 has teeth along the parallel direction of the beam plate 1.

[0027] The beam plate 1 has a rotating gear 6 fixed on the same shaft that meshes with the drive gear plate 5 and a gear 7 that meshes with the follower gear plate 9. The diameter of the gear 7 is 3-4 times the diameter of the gear 6.

[0028] When the linkage plate 2 is squeezed, the drive gear plate 5 moves along the vertical direction of the beam plate 1, causing gear 6 and gear 7 to rotate coaxially. The rotation of gear 7 causes the follower gear plate 9 to move along the parallel direction of the beam plate 1.

[0029] When installing the protective beam, the linkage plate 2 is pressed against the inner top surface of the coal mine. At this time, the linkage plate 2 will be squeezed, and the drive tooth plate 5 moves downward with the linkage plate 2. Since the drive tooth plate 5 is meshed with gear 6, when the drive tooth plate 5 moves downward, it will drive gear 6 to rotate clockwise. Since gear 6 and gear 7 are coaxially installed, the clockwise rotation of gear 6 will drive gear 7 to rotate clockwise. The clockwise rotation of gear 7 can cause the follower tooth plate 9 to drive the extension plate 8 to disengage from the inside of the beam plate 1, so that the end of the extension plate 8 located on the outside of the beam plate 1 is tightly pressed against the other extension plate 8, thereby closing the gap between the two protective beams and preventing the protective beam at the top of the coal mine from falling through the gap between the two protective beams and hitting the miners in the coal mine.

[0030] In addition, since the diameter of gear 2 7 is 3-4 times that of gear 1 6, the extension plate 8 extends from the inside of the beam plate 1 by 3-4 times the descent distance of the linkage plate 2. Even if the descent distance of the linkage plate 2 is limited, the extension plate 8 can still extend a longer distance. Furthermore, the overall size of the protective beam of this utility model is small, making it easy to carry.

[0031] The diameter of gear 7 is 3.5 times the diameter of gear 6.

[0032] By setting the diameter of gear 2 7 to 3.5 times that of gear 1 6, after the linkage plate 2 moves 1 cm, the extension plate 8 can extend 3.5 cm from the inside of the beam plate 1. When the linkage plate 2 has a small stroke, the extension plate 8 can have a 3.5 times increase in stroke, thus solving the problem that the extension plate 8 cannot be pressed against another adjacent extension plate 8 due to the small stroke of the linkage plate 2.

[0033] A limiting cavity 101 is provided on the beam plate 1, and an inverted "T"-shaped guide post 3 is fixed on the side of the linkage plate 2 near the drive tooth plate 5, with one end inserted into the limiting cavity 101.

[0034] By using the limiting cavity 101 and the inverted "T"-shaped guide column 3 together, the linkage plate 2 can run stably in the vertical direction of the beam plate 1.

[0035] The inverted "T"-shaped guide post 3 is equipped with a return spring 4 that presses the inverted "T"-shaped guide post 3 outward at one end inside the limiting cavity 101;

[0036] By installing the reset spring 4, the linkage plate 2 can be restored to its original shape without being subjected to external force, so that the protruding plate 8 can be completely stored inside the beam plate 1, thus avoiding the shield beam being too large and inconvenient to carry and store when not in use.

[0037] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A protective beam, characterized in that: It includes a beam plate (1) and a linkage plate (2) that slides in its vertical direction, wherein a drive tooth plate (5) is fixed on the side of the linkage plate (2) near the beam plate (1); One side of the beam (1) is inserted with a protruding plate (8) that slides in its parallel direction, and one end of the protruding plate (8) located inside the beam (1) is fixed with a follower toothed plate (9) that is parallel to it. The beam plate (1) has a gear 1 (6) fixed on the same shaft that meshes with the drive gear plate (5) and a gear 2 (7) that meshes with the follower gear plate (9). The diameter of the gear 2 (7) is 3-4 times the diameter of the gear 1 (6). When the linkage plate (2) is squeezed, the drive tooth plate (5) moves along the vertical direction of the beam plate (1), causing gear one (6) and gear two (7) to rotate coaxially. The rotation of gear two (7) causes the follower tooth plate (9) to move along the parallel direction of the beam plate (1).

2. A protective beam according to claim 1, characterized in that: The diameter of gear 2 (7) is 3.5 times the diameter of gear 1 (6).

3. A protective beam according to claim 2, characterized in that: A limiting cavity (101) is provided on the beam plate (1), and an inverted "T"-shaped guide post (3) is fixed on the side of the linkage plate (2) near the drive tooth plate (5), with one end inserted into the limiting cavity (101).

4. A protective beam according to claim 3, characterized in that: The inverted "T" shaped guide post (3) is equipped with a return spring (4) that presses the inverted "T" shaped guide post (3) outward at one end inside the limiting cavity (101).

5. A hydraulic support, characterized in that, It includes the hydraulic support shield beam as described in any one of claims 1-4, and the hydraulic support shield beam is further provided with connecting rods and hydraulic drive components.

Images