CN104047601A - Fastener used for coal plough cutter - Google Patents

Abstract

The invention relates to a coal plough for exploiting coal mine underground thin seam, and concretely relates to a fastener used for a coal plough cutter. A traditional coal plough cutter fastener is a bolt with a wood screw thread structure, and has a problem that the time taken by dismounting is long in the coal plough cutter maintenance process. The fastener provided by the invention is formed by a cutter seat, a nylon briquette, a square screw and a cutter; the lower portion of the cutter is a handle, the lower end of the cutter is provided with a rectangular through groove, and the left side of the cutter is provided with a long circular hole; the main body pedestal of the nylon briquette has a long cylindrical shape; the upper and lower surfaces of the square screw are parallel wedge planes with small left sides and large right sides, and the front and back surfaces of the square screw are rectangular planes; the upper and lower surfaces of the left end of the square screw are provided with circular grooves, and the front and back surfaces in corresponding positions are provided with rectangular through grooves; the main body pedestal of the nylon briquette is placed in the long circular hole; and the handle-shaped lower end of the cutter is inserted to the inclined through groove of the cutter seat, the lower end of the cutter seat is provided with a rectangular through grove, and the square screw is wedged into the rectangular through groove at the lower portion of the cutter from the right end of the cutter seat. The fastener can effectively prevent the shedding of the cutter of the above coal plough.

Description

Fastening device for plow knives

technical field

The invention relates to the technical field of coal plows for thin coal seam mining in underground coal mines, in particular to a fastening device for coal plow cutters.

Background technique

The traditional coal plow planer used for underground mining of coal mines uses bolts of wood thread structure, and the expandability of the rubber sleeve is used to fasten the planer, and the bolt needs to be screwed into the sleeve. If the planer needs to be replaced in the maintenance process, the bolt needs to be fully unscrewed out of the casing, which leads to a long downtime and affects the mining efficiency of the thin coal seam.

Contents of the invention

The purpose of the present invention is to provide a fastening device for coal plow knives, which solves the problem of long time-consuming disassembly in the maintenance process of the existing coal plow plow knives.

The technical solution adopted by the present invention is: it is composed of a planer seat, a nylon briquetting block, a square screw and a planer; the bottom of the planer is a handle-shaped structure, and there is a horizontal rectangular slot near the lower end, and a vertical rectangular slot is provided on the left side. Long circular sink; the nylon briquetting block is composed of a main body base and a cylinder with a through hole on it near the left end. The upper and lower surfaces of the screw are wedge-shaped planes parallel to each other, the left side is small and the right side is large, and the front and rear surfaces are rectangular planes with wedge angles; the upper and lower surfaces of the left end have corresponding circular grooves, and the front and rear surfaces at the corresponding positions of the left end have rectangular through grooves; The upper, lower, left, and right sides of the square screw are all serrated; the bottom of the main body base of the nylon briquetting block is placed in the oblong recess, which interferes with the oblong recess on the planer; Into the through groove, the lower end of the planer holder is provided with a rectangular through groove corresponding to the lower end of the planer. The distance h ₂ between the bottom surface of the oblong recess and the bottom surface of the rectangular through groove is smaller than the height h ₁ of the base of the nylon briquetting block, and the difference is 3-5mm.

Further, the tapered structure at the bottom of the nylon briquetting block refers to: the angle between the conical surface of the bottom and the vertical direction is β, 10°≤β≤20°; the angle between the bottom surface and the horizontal is α≤5°.

Further, the wedge angle γ of the rectangular plane of the square screw is 1-3°.

Further, the depth of the rectangular through groove opened at the front and back of the left end of the square screw is ≤2mm.

Further, the height h of the nylon briquetting block ≤ the height h ₃ from the bottom surface of the rectangular through groove of the planer to the surface of the shank.

Further, the screw cap at the right end of the square screw is provided with a straight groove parallel to the upper and lower surfaces of the square screw.

The advantages of the present invention are: through the improvement of the structure, the planer seat with wedge-shaped through groove, square screw with wedge-shaped structure and long cylindrical nylon briquetting block are selected, which not only enhances the stability of the planer after assembly, but also realizes the plowing of coal. The machine planer can be quickly disassembled.

Fig. 1 is the structural cross-sectional view of the fastening device that the present invention is used for coal plow planer;

Fig. 2 is the structure diagram that nylon briquetting is packed in the oblong recess of planer;

Fig. 3 is the A-A direction sectional view of Fig. 2;

Fig. 4 is the front view of nylon briquetting block;

Fig. 5 is the top view of nylon compact;

Fig. 6 is a B-B sectional view of the nylon briquetting block;

Fig. 7 is the front view of square screw;

Figure 8 is a top view of the square screw.

Detailed ways

In the figure: 1. Planer seat, 2. Nylon briquetting block, 3. Square screw, 4. Planer;

h: the height of the nylon briquetting block 2 .

h ₁ : the height of the base of the nylon pressure block 2 .

h ₂ : the distance between the bottom surface of the oblong sunken recess and the bottom surface of the rectangular through groove.

h ₃ : The height from the bottom surface of the square groove of planer 4 to the surface of the handle.

As shown in Figures 1 to 8, the fastening device for the planer of a coal plow consists of a planer seat 1, a nylon briquetting block 2, a square screw 3, and a planer 4. The bottom of the planer 4 is a handle-shaped structure, and there is a horizontal rectangle near the lower end. A through groove, and on the left side is provided with an oblong sink perpendicular to the rectangular through groove; the nylon briquetting block 2 is composed of a main body base and a cylinder with a through hole near the left end on it, and the main body base is long cylindrical , with a conical structure at the bottom and a herringbone groove at the bottom;

The upper and lower surfaces of the square screw 3 are wedge-shaped planes parallel to each other, the left side is small and the right side is large, and the front and rear surfaces are rectangular planes with wedge angles; Groove; square screw up, down, left, and right sides are all set as serrated.

The bottom of the base of the main body of the nylon briquetting block 2 is placed in the oblong recess, which is in interference fit with the oblong recess on the planer 4; the handle-shaped lower end of the planer 4 is inserted into the oblique channel of the planer seat 1, 1 The lower end is provided with a rectangular slot corresponding to the lower end of the planer 4, the shape of the slot corresponds to the square screw 3, and the square screw 3 is wedged into the rectangular slot at the bottom of the planer 4 from the right end of the planer seat 1;

The nylon briquetting block 2 is made of polyurethane rubber with a Shore hardness of 75-85.

The distance h ₂ between the bottom surface of the oblong recess at the left lower end of the planer 4 and the bottom surface of the rectangular through groove is less than the height h ₁ of the base of the nylon briquetting block 2, and the difference is 3-5mm; when the base of the nylon briquetting block 2 is placed on the oblong When the square screw 3 is wedged into the rectangular through groove at the bottom of the planer 4 from the right end of the planer seat 1, the square screw 3 and the rectangular through groove Friction is generated between the inner nylon briquetting blocks 2.

As shown in Figure 4, the tapered structure at the bottom of the nylon briquetting block (2) means: the angle between the conical surface of the bottom and the vertical direction is β, 10°≤β≤20°; the angle between the bottom surface and the horizontal is α≤5°.

As shown in Figure 8, the wedge angle γ of the rectangular plane of the square screw (3) is 1-3°.

The depth of the rectangular through groove opened at the front and back of the left end of the square screw is ≤2mm.

As shown in FIG. 3 , the height h of the nylon briquetting block 2 ≤ the height h ₃ from the bottom surface of the rectangular through groove of the planer 4 to the surface of the handle.

As shown in Figure 7, the screw cap at the right end of the square screw is provided with a straight groove parallel to the upper and lower surfaces of the square screw.

During installation, the nylon briquetting block 2 is pressed into the oblong recess of the planer 4, and the cylinder of the nylon briquetting block 2 is close to the bottom to complete the interference fit. The designed cylinder of the nylon briquetting block 2 is not higher than the surface of the shank of the planer 4, and the height h ₁ of the base of the main body is greater than the distance h ₂ between the bottom surface of the oblong recess at the left lower end of the planer 4 and the bottom surface of the rectangular through groove. After the shank-shaped lower end of the planer 4 is inserted into the oblique through groove of the planer holder 1, place the straight groove on the screw cap at the right end of the square screw 3 horizontally, and wedge it into the rectangular through groove at the lower part of the planer 4 from the right end of the planer holder 1. The cylinder is elastically deformed after being squeezed, and when the cylinder coincides with the circular groove at the front end of the square screw 3, the cylinder of the nylon briquetting block 2 releases the pressure and blocks the circular groove, and the two sides of the main body base of the nylon briquetting block 2 The sides clamp the rectangular groove at the front end of the square screw 3 to complete the fastening of the planer 4 and the planer holder 1 . When disassembling the planer, it is only necessary to use a tool to pry the square screw 3 out for a small distance, so that the square screw 3 is separated from the nylon pressing block 2, and the planer can be quickly disassembled.

It should be understood that the above detailed description of the technical solution of the present invention with the aid of preferred embodiments is illustrative rather than restrictive. Those skilled in the art can modify the technical solutions described in the embodiments on the basis of reading the description of the present invention, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions Deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. A fastening device for a coal plow cutter, characterized in that it consists of a planer seat (1), a nylon briquetting block (2), a square screw (3) and a planer (4); The bottom of the planer (4) is a shank-shaped structure, and there is a horizontal rectangular channel near the lower end, and an oblong sink perpendicular to the rectangular channel is provided on the left side; The nylon briquetting block (2) is composed of a main body base and a cylinder with a through hole near the left end on it, the main body base is long cylindrical, the bottom end is a tapered structure, and the bottom is provided with a herringbone groove; The upper and lower surfaces of the square screw (3) are wedge-shaped planes parallel to each other, the left side is small and the right side is large, and the front and rear surfaces are rectangular planes with wedge angles; Rectangular through slot; the upper, lower, left, and right sides of the square screw are all serrated; The base of the main body of the nylon briquetting block (2) is placed in the oblong recess of the planer (4), and is in interference fit with the oblong recess on the planer (4); the shank-shaped lower end of the planer (4) is inserted into the planer seat ( In the oblique channel of 1), the lower end of the planer seat (1) is provided with a rectangular channel corresponding to the lower end of the planer (4). The shape of the channel corresponds to the square screw (3). (1) the right end is wedged in the rectangular slot at the bottom of the planer (4); The distance h ₂ between the bottom surface of the oblong recess at the left lower end of the planer (4) and the bottom surface of the rectangular through groove is smaller than the height h ₁ of the main body base of the nylon briquetting block (2), and the difference is 3-5 mm. 2. A fastening device for plow cutters according to claim 1, characterized in that, the tapered structure at the bottom of the nylon briquetting block (2) refers to: the conical surface at the bottom is clamped with the vertical direction The angle is β, 10°≤β≤20°; the angle between the bottom surface and the horizontal is α≤5°. 3. A fastening device for plow cutters according to claim 1, characterized in that, the wedge angle γ of the rectangular plane on the front and rear surfaces of the square screw (3) is 1-3°. 4. A fastening device for coal plow cutters according to claim 1, characterized in that the depth of the rectangular through groove opened at the front and back of the left end of the square screw (3) is ≤2mm. 5. A kind of fastening device for coal plow cutter according to claim 1, characterized in that the screw cap at the right end of the square screw (3) has a straight hole parallel to the upper and lower surfaces of the square screw (3). groove. 6. A fastening device for plow cutters according to claim 1, characterized in that the height h of the nylon briquetting block (2) ≤ the height from the bottom surface of the rectangular through groove of the planer (4) to the surface of the handle h ₃ .