Tensioning mechanism for plate-type chain and jumbolter

Abstract

The utility model discloses a tensioning mechanism for a plate-type chain and an anchor rod drilling machine. The tensioning mechanism comprises a first tensioning bolt, a first tensioning adjusting block, a drilling box guide sleeve, a second tensioning bolt and a second tensioning adjusting block. An opening is formed in one side of the drilling box guide sleeve, and the first tensioning adjusting block and the second tensioning adjusting block are oppositely arranged in the opening; round holes are formed in the opposite sides of the first tensioning adjusting block and the second tensioning adjusting block, and threaded holes are formed in the opposite sides of the first tensioning adjusting block and the second tensioning adjusting block; the first tensioning bolt penetrates through an opening of the drill box guide sleeve and sequentially penetrates through the first tensioning adjusting block and the second tensioning adjusting block. The second tensioning bolt penetrates through the opening of the drilling box guide sleeve and sequentially penetrates through the second tensioning adjusting block and the first tensioning adjusting block; the first tensioning adjusting block and the second tensioning adjusting block are both connected with the chain mechanism. Two-way adjustment of chain tensioning is achieved through the two tensioning bolts, and the stress condition of the tensioning mechanism is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine tunnel anchoring construction, and in particular relates to a tensioning mechanism for a plate chain and an anchor drilling machine. Background Art

[0002] The feeding of the drill box of the anchor drill used in the anchor protection construction of coal mine tunnels is usually driven by the chain on both sides of the cylinder, and the chain drives the drill box to feed or retreat. At present, the plate chain is mainly used for transmission, which needs to be tensioned and adjusted to ensure that the force on both sides of the drill box is balanced.

[0003] The existing tensioning mechanism is a one-way cantilever tensioning mechanism, and its main structure is a fixed block connected to the rear chain, an adjustment block connected to the front chain, and an adjustment bolt. Before working, the adjustment bolt drives the front adjustment block to move relative to the drill box, thereby achieving the tensioning of the entire chain mechanism. This tensioning mechanism has two problems:

[0004] (1) Since the rear chain is connected to the fixed block, which is in turn fixed to the drill box guide sleeve, the length of the rear chain determines the limit travel position of the drill box guide sleeve and the drill box. When the rear chain is too long, the drill box will exceed the limit travel position, which may cause interference between the drill box and the vertical plate; when the rear chain is too short, the drill box cannot reach the limit travel position, thereby reducing the feed stroke of the drill box.

[0005] (2) Since both the fixed block and the adjusting block are cantilever structures, the force-bearing positions are at the cantilever ends. During operation, they will be subjected to large torques, causing large stresses at the roots of the fixed block and the adjusting block, making them prone to damage. Summary of the invention

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a tensioning mechanism for a plate chain and an anchor drilling rig, which adopts a simple structure to realize the tensioning adjustment of the chains on both sides, ensure the relative position of the drill box and the chain, and change the cantilever installation to a centrally symmetrical installation, thereby improving the stress condition.

[0007] The utility model provides the following technical solutions:

[0008] In the first aspect, a tensioning mechanism for a plate chain is provided, comprising a first tensioning bolt, a first tensioning adjustment block, a drill box guide sleeve, a second tensioning bolt and a second tensioning adjustment block; an opening is provided on one side of the drill box guide sleeve, and the first tensioning adjustment block and the second tensioning adjustment block are relatively arranged in the opening; circular holes are provided on opposite sides of the first tensioning adjustment block and the second tensioning adjustment block, and threaded holes are provided on opposite sides of the first tensioning adjustment block and the second tensioning adjustment block; the first tensioning bolt passes through the opening of the drill box guide sleeve, and passes through the first tensioning adjustment block and the second tensioning adjustment block in sequence through the circular hole and the threaded hole; the second tensioning bolt passes through the opening of the drill box guide sleeve, and passes through the second tensioning adjustment block and the first tensioning adjustment block in sequence through the circular hole and the threaded hole; the first tensioning adjustment block and the second tensioning adjustment block are both connected to the chain mechanism.

[0009] As an optional technical solution of the present invention, the opening of the drill box guide sleeve is U-shaped, and circular holes for the first tensioning bolt and the second tensioning bolt to pass through are provided on both sides thereof.

[0010] As an optional technical solution of the present invention, the first tensioning bolt and the second tensioning bolt are both fixed to the drill box guide sleeve by fixing nuts.

[0011] As an optional technical solution of the present invention, the chain mechanism includes a first chain and a second chain; the lower end of the first tensioning adjustment block is connected to the first chain, and the tensioning or relaxation of the first chain is adjusted by the first tensioning bolt; the lower end of the second tensioning adjustment block is connected to the second chain, and the tensioning or relaxation of the second chain is adjusted by the second tensioning bolt.

[0012] As an optional technical solution of the present invention, two circular holes are respectively provided on the opposite sides of the first tensioning adjustment block and the second tensioning adjustment block, and two threaded holes are respectively provided on the opposite sides of the first tensioning adjustment block and the second tensioning adjustment block; the circular holes and threaded holes on the same side of the first tensioning adjustment block and the second tensioning adjustment block are concentrically arranged.

[0013] As an optional technical solution of the present invention, the round hole and threaded hole on one side of the first tensioning adjustment block and the second tensioning adjustment block are used for the first tensioning bolt to pass through, and the round hole and threaded hole on the other side are used for the second tensioning bolt to pass through.

[0014] In a second aspect, an anchor drilling rig is provided, comprising a drill box and the tensioning mechanism described in the first aspect; tensioning mechanisms are provided on both sides of the bottom of the drill box, and a chain mechanism is connected through the tensioning mechanism.

[0015] As an optional technical solution of the present utility model, both sides of the drill box are fixedly connected to the drill box guide sleeves.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The tensioning mechanism for the plate chain provided by the utility model realizes the tensioning adjustment of the double-sided chain mechanism through the first tensioning bolt, the first tensioning adjustment block, the drill box guide sleeve, the second tensioning bolt and the second tensioning adjustment block, and has a simple structure; at the same time, the chain mechanism is changed from the original cantilever installation to the central symmetrical installation, the stress condition of the tensioning mechanism is improved, and the reliability is improved.

[0018] 2. The anchor drilling rig provided by the utility model ensures the relative position of the drill box and the chain mechanism well through the setting of the tensioning mechanism, and the feeding stroke of the drill box will not be affected by the length of the first chain, while avoiding structural interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the assembly of the tensioning mechanism in the embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a chain mechanism in an embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the assembly of the tensioning mechanism and the drill box in the embodiment of the utility model.

[0022] Markings in the figure are: 1. drill box; 2. second chain; 3. second sprocket; 4. chain fixing block; 5. first chain; 6. first sprocket; 7. first tensioning bolt; 8. fixing nut; 9. first tensioning adjustment block; 10. drill box guide sleeve; 11. second tensioning adjustment block; 12. second tensioning bolt. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0024] Example 1

[0025] This embodiment provides a tensioning mechanism for a plate chain, such as Figure 1 As shown, it includes a first tensioning bolt 7, a first tensioning adjustment block 9, a drill box guide sleeve 10, a second tensioning bolt 12 and a second tensioning adjustment block 11.

[0026] An opening is provided on one side of the drill box guide sleeve 10, and the first tensioning adjustment block 9 and the second tensioning adjustment block 11 are relatively arranged in the opening; the first tensioning adjustment block 9 and the second tensioning adjustment block 11 are provided with circular holes on the opposite sides, and the first tensioning adjustment block 9 and the second tensioning adjustment block 11 are provided with threaded holes on the opposite sides.

[0027] Furthermore, the opening of the drill box guide sleeve 10 is U-shaped, and both sides thereof are provided with round holes for the first tensioning bolt 7 and the second tensioning bolt 12 to pass through. In this embodiment, the round holes on the drill box guide sleeve 10 play a supporting and guiding role, and the specification thereof is Φ20mm.

[0028] Furthermore, two circular holes are respectively provided on the opposite sides of the first tensioning adjustment block 9 and the second tensioning adjustment block 11, and two threaded holes are respectively provided on the opposite sides of the first tensioning adjustment block 9 and the second tensioning adjustment block 11. The circular holes and threaded holes on the same side of the first tensioning adjustment block 9 and the second tensioning adjustment block 11 are concentrically arranged.

[0029] Furthermore, in this embodiment, the circular holes on the first tensioning adjustment block 9 and the second tensioning adjustment block 11 play a supporting and guiding role, and their specifications are Φ20mm. The threaded holes on the first tensioning adjustment block 9 and the second tensioning adjustment block 11 are used to thread with the first tensioning bolt 7 and the second tensioning bolt 12 to play a tensioning adjustment role, and both are M18 threaded holes. The first tensioning bolt 7 and the second tensioning bolt 12 are both M18 bolts.

[0030] Further, in this embodiment, the first tensioning bolt 7 is threadedly matched with the first tensioning adjustment block 9, and since the side of the second tensioning adjustment block 11 close to the first tensioning bolt 7 is a round hole, there is no match between the first tensioning bolt 7 and the second tensioning bolt 12. The second tensioning bolt 12 is threadedly matched with the second tensioning adjustment block 11, and since the side of the first tensioning adjustment block 9 close to the first tensioning bolt 7 is a round hole, there is no match between the second tensioning bolt 12 and the second tensioning adjustment block 11.

[0031] The first tensioning bolt 7 passes through the opening of the drill box guide sleeve 10, and passes through the first tensioning adjustment block 9 and the second tensioning adjustment block 11 in sequence through the round hole and the threaded hole. The second tensioning bolt 12 passes through the opening of the drill box guide sleeve 10, and passes through the second tensioning adjustment block 11 and the first tensioning adjustment block 9 in sequence through the round hole and the threaded hole.

[0032] Furthermore, the round hole and the threaded hole on one side of the first tensioning adjustment block 9 and the second tensioning adjustment block 11 are used for the first tensioning bolt 7 to pass through, and the round hole and the threaded hole on the other side are used for the second tensioning bolt 12 to pass through.

[0033] Furthermore, the first tensioning bolt 7 and the second tensioning bolt 12 are both fixed to the drill box guide sleeve 10 via fixing nuts 8 .

[0034] The first tensioning adjustment block 9 and the second tensioning adjustment block 11 are both connected to a chain mechanism. Figure 2As shown, the chain mechanism includes a first chain 5 and a second chain 2, both of which are equal in length. The first chain 5 and the second chain 2 are fixed on a chain fixing block 4, and are respectively wound around the second sprocket 3 and the first sprocket 6. The distance between the second sprocket 3 and the first sprocket 6 is fixed.

[0035] Further, the lower end of the first tensioning adjustment block 9 is connected to the first chain 5, and the tension or relaxation of the first chain 5 is adjusted by the first tensioning bolt 7. The lower end of the second tensioning adjustment block 11 is connected to the second chain 2, and the tension or relaxation of the second chain 2 is adjusted by the second tensioning bolt 12.

[0036] Working principle:

[0037] When the tension needs to be adjusted, the first tensioning bolt 7 is rotated forward or reversed, and the first tensioning adjustment block 9 moves backward or forward to tighten or loosen the first chain. The second tensioning bolt 12 is rotated forward or reversed, and the second tensioning adjustment block 11 moves backward or forward to tighten or loosen the second chain.

[0038] Example 2

[0039] This embodiment provides an anchor drilling rig, comprising a drill box 1 and the tensioning mechanism described in Embodiment 1.

[0040] like Figure 3 As shown, tensioning mechanisms are provided on both sides of the bottom of the drill box 1, and the chain mechanisms are connected through the tensioning mechanisms.

[0041] Furthermore, both sides of the drill box 1 are fixedly connected to the drill box guide sleeves 10 .

[0042] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A tensioning mechanism for a leaf chain, characterized in that: It comprises a first tensioning bolt (7), a first tensioning adjustment block (9), a drill box guide sleeve (10), a second tensioning bolt (12) and a second tensioning adjustment block (11); An opening is provided on one side of the drill box guide sleeve (10), and the first tensioning adjustment block (9) and the second tensioning adjustment block (11) are arranged opposite to each other in the opening; a circular hole is provided on the opposite side of the first tensioning adjustment block (9) and the second tensioning adjustment block (11), and a threaded hole is provided on the opposite side of the first tensioning adjustment block (9) and the second tensioning adjustment block (11); The first tensioning bolt (7) passes through the opening of the drill box guide sleeve (10), and passes through the first tensioning adjustment block (9) and the second tensioning adjustment block (11) in sequence through the circular hole and the threaded hole; the second tensioning bolt (12) passes through the opening of the drill box guide sleeve (10), and passes through the second tensioning adjustment block (11) and the first tensioning adjustment block (9) in sequence through the circular hole and the threaded hole; The first tensioning adjustment block (9) and the second tensioning adjustment block (11) are both connected to a chain mechanism.

2. The tensioning mechanism for a leaf chain according to claim 1, characterized in that: The opening of the drill box guide sleeve (10) is U-shaped, and circular holes for the first tensioning bolt (7) and the second tensioning bolt (12) to pass through are provided on both sides thereof.

3. The tensioning mechanism for a leaf chain according to claim 1, characterized in that: The first tensioning bolt (7) and the second tensioning bolt (12) are both fixed to the drill box guide sleeve (10) via a fixing nut (8).

4. The tensioning mechanism for a leaf chain according to claim 1, characterized in that: The chain mechanism comprises a first chain (5) and a second chain (2); The lower end of the first tensioning adjustment block (9) is connected to the first chain (5), and the tension or loosening of the first chain (5) is adjusted via the first tensioning bolt (7); The lower end of the second tensioning adjustment block (11) is connected to the second chain (2), and the tension or loosening of the second chain (2) is adjusted via the second tensioning bolt (12).

5. The tensioning mechanism for a leaf chain according to claim 1, characterized in that: Two circular holes are respectively provided on opposite sides of the first tensioning adjustment block (9) and the second tensioning adjustment block (11), and two threaded holes are respectively provided on opposite sides of the first tensioning adjustment block (9) and the second tensioning adjustment block (11); The circular hole and the threaded hole on the same side of the first tensioning adjustment block (9) and the second tensioning adjustment block (11) are concentrically arranged.

6. The tensioning mechanism for a leaf chain according to claim 5, characterized in that: The circular hole and the threaded hole on one side of the first tensioning adjustment block (9) and the second tensioning adjustment block (11) are used for the first tensioning bolt (7) to pass through, and the circular hole and the threaded hole on the other side are used for the second tensioning bolt (12) to pass through.

7. An anchor drilling machine, characterized in that: It comprises a drill box (1) and a tensioning mechanism as claimed in any one of claims 1 to 6; Both sides of the bottom of the drill box (1) are provided with tensioning mechanisms, and the chain mechanisms are connected via the tensioning mechanisms.

8. The anchor drilling machine according to claim 7, characterized in that: Both sides of the drill box (1) are fixedly connected to the drill box guide sleeves (10).

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