Forward-pushing centrifugal flail knife

Abstract

The forward-pushing centrifugal flail knife comprises a knife bar, a supporting rod, a limiting groove, a blade, an opening mechanism and a linkage mechanism, the supporting rod is coaxially and rotatably connected to the interior of the knife bar, one end of the supporting rod is connected with an external supporting structure, and the limiting groove is formed in the side wall of the knife bar. The utility model has the beneficial effects that by arranging the opening mechanism and the linkage mechanism, the driving bevel gear ring is driven to rotate through the rotation of the cutter bar, the driven bevel gear is engaged and linked, the rack is driven to move through the rotation of the linkage gear, the fluted disc is driven to be engaged and linked through the adjusting rod, and the blade is driven to rotate and open; the blades are opened through a gear tooth groove structure, so that the situation that the blades cannot be opened due to insufficient centrifugal force or clamping connection at the blade connecting positions is effectively avoided; by means of sliding of the sliding block on the guide rod, after the blade rotates to the locking position, the linkage gear can slide on the sliding block, and tooth hitting caused by meshing with the rack is avoided.

Description

Technical Field

[0001] The utility model relates to a centrifugal fling cutter, in particular to a forward-pushing centrifugal fling cutter, belonging to the technical field of coal mining equipment. Background Art

[0002] A coal mine is a reasonable space excavated by humans when they dig geological layers rich in coal. It usually includes tunnels, shafts, and mining faces, etc. Coal is the most important solid fuel and a type of combustible organic rock. It is formed by lush plants growing in a certain geological age. In a suitable geological environment, it gradually accumulates into thick layers and is buried under water or in mud. It is formed by natural coalification over a long geological period. Since coal mines are located underground, a variety of mining equipment is often required to open holes during the mining process, including centrifugal cutters.

[0003] However, most of the existing coal mining equipment have various problems. For example, in a coal mining tunneling machine disclosed in publication number CN111894575A, although it can effectively select different drill bits according to different rock formations, effectively reducing equipment wear, it also improves the equipment's working efficiency and reduces the time it takes to replace drill bits. However, in the actual mining process, in order to meet the needs of hole expansion, a centrifugal cutter is also used. The centrifugal cutter generally uses centrifugal force to throw out the cutter on the cutter rod to open it. However, in actual operation, the method of throwing out the cutter by centrifugal force requires the driving device to run at high speed. If the speed is insufficient, the cutter cannot be opened, and if the cutter connector is stuck by gravel, the cutter cannot be opened. Therefore, the current centrifugal cutter cannot control the cutter to open effectively. Utility Model Content

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. Specifically, the purpose of the present invention is to solve the above-mentioned shortcomings in the existing technology and propose a forward-pushing centrifugal blade.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A forward-pushing centrifugal fling knife comprises a knife bar, a support rod, a limiting groove, a blade, an opening mechanism and a linkage mechanism, wherein the support rod is coaxially connected to the inside of the knife bar, and one end of the support rod is connected to an external support structure, the limiting groove is provided on the side wall of the knife bar, and one end of the blade is rotatably connected to the limiting groove;

[0007] The opening mechanism is arranged inside the knife rod, and the opening mechanism includes a base, a rack, an adjusting rod and a toothed disc, the base is fixed on the support rod and is located at one end of the knife rod, the rack is slidably connected to the base, the adjusting rod is fixed at one end of the rack, and an annular notch is provided on the adjusting rod, the toothed disc is fixed at the connecting end of the blade and the knife rod, and the toothed disc is partially engaged in the annular notch of the adjusting rod;

[0008] The linkage mechanism is arranged on the base.

[0009] As a further solution of the present invention: the linkage mechanism includes an active bevel gear ring, a transmission rod and a driven bevel gear, the active bevel gear ring is coaxially fixed inside the tool rod, the transmission rod is rotatably connected to the base, the driven bevel gear is coaxially fixed to one end of the transmission rod, and the driven bevel gear is meshed with the active bevel gear ring.

[0010] As a further solution of the present invention: a linkage gear is coaxially fixed to one end of the transmission rod away from the driven bevel gear, and the linkage gear is meshed with the rack.

[0011] As a further solution of the present invention: the linkage mechanism also includes a slider and a guide rod, the guide rod is fixed on one end of the rack away from the adjusting rod, and the slider is slidably connected to the guide rod.

[0012] As a further solution of the present invention: a return spring is sleeved on the outside of the guide rod, one end of the return spring abuts against the slider, and the other end abuts against the rack.

[0013] As a further solution of the present invention: a dovetail-shaped notch is provided on the base, and a dovetail-shaped protrusion is provided at the bottom of the rack, and the protrusion is slidably engaged in the notch.

[0014] The beneficial effects of the utility model are:

[0015] In the present invention, an opening mechanism and a linkage mechanism are provided, and the rotation of the cutter rod drives the active bevel gear ring to rotate, thereby causing the driven bevel gear to mesh and link, and the linkage gear rotates, thereby driving the rack to move, and the adjustment rod drives the toothed disc to mesh and link, thereby driving the blade to rotate and open, and the blade is opened by the gear tooth groove structure, thereby effectively avoiding the situation where the blade cannot be opened due to insufficient centrifugal force or the blade connection is stuck;

[0016] By sliding the slider on the guide rod, the blade is rotated to the locked position, and the linkage gear can slide on the slider to avoid engaging with the rack and causing teeth to clash. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall external structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the opening mechanism and its overall connection structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the linkage mechanism structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the active bevel gear ring and its connection structure of the utility model.

[0021] In the figure: 1. knife bar, 2. support rod, 3. limit groove, 4. blade, 5. opening mechanism, 51. base, 52. rack, 53. adjustment rod, 54. gear plate, 6. linkage mechanism, 61. active bevel gear ring, 62. transmission rod, 63. driven bevel gear, 64. linkage gear, 65. slider, 66. guide rod, 67. return spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1, as Figures 1 to 4 As shown, a forward-pushing centrifugal fling knife includes a knife bar 1, a support rod 2, a limiting groove 3, a blade 4, an opening mechanism 5 and a linkage mechanism 6. The support rod 2 is coaxially connected to the inside of the knife bar 1, and one end of the support rod 2 is connected to the external support structure. The limiting groove 3 is provided on the side wall of the knife bar 1, and one end of the blade 4 is rotatably connected to the limiting groove 3.

[0024] The opening mechanism 5 is arranged inside the knife bar 1, and the opening mechanism 5 includes a base 51, a rack 52, an adjusting rod 53 and a toothed disc 54. The base 51 is fixed on the support rod 2 and is located at one end of the knife bar 1. The rack 52 is slidably connected to the base 51. The adjusting rod 53 is fixed to one end of the rack 52 and is provided with an annular notch. The toothed disc 54 is fixed to the connecting end of the blade 4 and the knife bar 1, and the toothed disc 54 is partially engaged in the annular notch of the adjusting rod 53.

[0025] The linkage mechanism 6 is provided on the base 51 and includes an active bevel gear ring 61, a transmission rod 62 and a driven bevel gear 63. The active bevel gear ring 61 is coaxially fixed inside the arbor 1, the transmission rod 62 is rotatably connected to the base 51, the driven bevel gear 63 is coaxially fixed to one end of the transmission rod 62, and the driven bevel gear 63 is meshed with the active bevel gear ring 61. A linkage gear 64 is coaxially fixed to the end of the transmission rod 62 away from the driven bevel gear 63, and the linkage gear 64 is meshed with the rack 52.

[0026] The linkage mechanism 6 further includes a slider 65 and a guide rod 66 . The guide rod 66 is fixed to one end of the rack 52 away from the adjustment rod 53 , and the slider 65 is slidably connected to the guide rod 66 .

[0027] In the present invention, an opening mechanism 5 and a linkage mechanism 6 are provided, and the rotation of the cutter bar 1 drives the active bevel gear ring 61 to rotate, thereby causing the driven bevel gear 63 to mesh and link, and rotate through the linkage gear 64, thereby driving the rack 52 to move, and the adjustment rod 53 drives the toothed disc 54 to mesh and link, thereby driving the blade 4 to rotate and open, and the opening of the blade 4 is achieved through the gear tooth groove structure, thereby effectively avoiding the situation where the blade 4 cannot be opened due to insufficient centrifugal force or the blade 4 connection is stuck;

[0028] By utilizing the sliding of the slider 65 on the guide rod 66 , the blade 4 is rotated to the locked position, and the linkage gear 64 can slide on the slider 65 to avoid meshing with the rack 52 and causing teeth to clash.

[0029] Example 2, as Figures 1 to 4 As shown, in addition to all the technical features of the first embodiment, this embodiment also includes:

[0030] A return spring 67 is sleeved on the outside of the guide rod 66 , one end of the return spring 67 abuts against the slider 65 , and the other end abuts against the rack 52 . The slider 65 can be quickly reset by the elastic force of the return spring 67 .

[0031] A dovetail-shaped notch is provided on the base 51 , and a dovetail-shaped protrusion is provided at the bottom of the rack 52 , and the protrusion is slidably engaged in the notch, and the rack 52 is limited by the protrusion to prevent it from separating from the base 51 .

[0032] When using the centrifugal knife, first place the knife bar 1 as a whole at the position where the hole needs to be expanded in the coal mine, and then drive the active bevel gear ring 61 to rotate through the rotation of the knife bar 1, so that the driven bevel gear 63 engages and rotates, and rotates through the linkage gear 64, thereby driving the rack 52 to move, and drives the toothed disk 54 to engage and engage through the adjusting rod 53, thereby driving the blade 4 to rotate and open. After the blade 4 is opened to 90 degrees, the linkage gear 64 is in contact with the slider 65, and the slider 65 slides on the guide rod 66 to avoid engagement and toothing with the rack 52.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0034] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A forward-pushing centrifugal knife, comprising a knife bar (1), a support rod (2), a limiting groove (3), a blade (4), an opening mechanism (5) and a linkage mechanism (6), characterized in that: The support rod (2) is coaxially rotatably connected to the inside of the knife rod (1), and one end of the support rod (2) is connected to the external support structure. The limiting groove (3) is provided on the side wall of the knife rod (1), and one end of the blade (4) is rotatably connected to the limiting groove (3). The opening mechanism (5) is arranged inside the knife rod (1), and the opening mechanism (5) includes a base (51), a rack (52), an adjusting rod (53) and a toothed disc (54), wherein the base (51) is fixed on the support rod (2) and is located at one end of the knife rod (1), the rack (52) is slidably connected to the base (51), the adjusting rod (53) is fixed to one end of the rack (52), and an annular notch is provided on the adjusting rod (53), the toothed disc (54) is fixed to the connecting end of the blade (4) and the knife rod (1), and the toothed disc (54) is partially engaged in the annular notch of the adjusting rod (53); the linkage mechanism (6) is arranged on the base (51).

2. The forward-pushing centrifugal blade according to claim 1, characterized in that: The linkage mechanism (6) comprises an active bevel gear ring (61), a transmission rod (62) and a driven bevel gear (63), wherein the active bevel gear ring (61) is coaxially fixed inside the knife rod (1), the transmission rod (62) is rotatably connected to the base (51), and the driven bevel gear (63) is coaxially fixed to one end of the transmission rod (62), and the driven bevel gear (63) is meshed with the active bevel gear ring (61).

3. The forward-pushing centrifugal blade according to claim 2, characterized in that: A linkage gear (64) is coaxially fixed to one end of the transmission rod (62) away from the driven bevel gear (63), and the linkage gear (64) is meshed with the rack (52).

4. The forward-pushing centrifugal blade according to claim 2, characterized in that: The linkage mechanism (6) further comprises a slider (65) and a guide rod (66), wherein the guide rod (66) is fixed to an end of the rack (52) away from the adjustment rod (53), and the slider (65) is slidably connected to the guide rod (66).

5. The forward-pushing centrifugal blade according to claim 4, characterized in that: A return spring (67) is sleeved on the outside of the guide rod (66), one end of the return spring (67) abuts against the slider (65), and the other end abuts against the rack (52).

6. The forward-pushing centrifugal blade according to claim 1, characterized in that: A dovetail-shaped notch is provided on the base (51), and a dovetail-shaped protrusion is provided at the bottom of the rack (52), and the protrusion is slidably engaged in the notch.

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