CN104863586A - Three-roller type chain pressing device for coal plough and chain pressing method - Google Patents

Abstract

The invention relates to the technical field of coal plows for thin coal seam mining, in particular to a three-roller chain pressure device and chain pressure method for coal plows, which are used to solve the problem of large wear of traditional pressure chain blocks and single pressure chain wheel. When the chain is pressed, the planer chain vibrates up and down. The three-roller chain pressing device includes three parts: the roller assembly, the shaft assembly, and the clamping plate. On the outer plate and the inner plate of the chain tensioning carriage in the transition groove, 3 sets of coaxial holes that rise sequentially toward the sprocket direction are set. The pressure chain roller is installed in the position of the above hole, and fixed with a clamp, and it is ensured that the roller assembly can rotate around the shaft assembly flexibly after assembly. The three-roller chain pressing device involved in the present invention breaks through the traditional chain pressing block relative sliding friction contact pressing technology, overcomes the unnecessary wear of the planer chain and the chain pressing block caused by the sliding pressing chain, and prolongs the use of the planer chain and the chain pressing device Life; the proposed method of alternating contact pressure chain solves the problem of the up and down vibration of the planer chain, and improves the chain pressure efficiency of the planer chain.

Description

Three-roller chain pressing device and chain pressing method for coal plow

technical field

The invention relates to the technical field of coal plows for thin coal seam mining, in particular to a three-roller chain pressing device and chain pressing method for coal plows.

Background technique

The traditional chain pressing method is to set a chain pressing block on the chain tightening carriage of the transition groove. The chain pressing block is located directly above the movement direction of the planing chain. On the planer chain, in order to achieve the purpose of changing the direction of the planer chain, sliding friction occurs between the planer chain and the press chain block in this chain pressing method. On the one hand, the friction and wear are serious, and the frictional heat is likely to cause martensitic cracks, which affects the service life of the planer chain and the pressing chain block; on the other hand, the sliding friction planer chain has high running resistance, which is not conducive to the reduction of the power of the whole machine.

Another method of pressing the chain is to replace the pressing chain block with a pressing chain wheel. The pressing chain wheel is rotatably arranged on the cage. The movement of the planing chain drives the pressing chain wheel to rotate, and rolling friction occurs between the two. This method has It is beneficial to reduce the wear amount of the pressure sprocket and reduce the running resistance of the planer chain. However, in this method, the pressure chain wheel contacts alternately with the planer chain link, which easily causes the planer chain to vibrate up and down, thereby causing fatigue failure of related parts and components, and affecting the stability and service life of the machine operation.

Contents of the invention

The purpose of the present invention is to provide a three-roller chain pressing device, three groups of chain pressing rollers periodically alternately compress the planer chain, the way the chain pressing device compresses the planer chain changes from sliding friction to rolling friction, and at the same time ensures that the planer chain At least one chain link is in a compressed state at any time, which overcomes the unnecessary wear of the planer chain and the chain press block caused by the sliding press chain, solves the problem of the up and down vibration of the planer chain, prolongs the service life of the planer chain and the press chain device, and improves The pressure chain efficiency of planer chain is improved.

The purpose of the present invention is achieved through the following technical solutions:

The three-roller chain pressure device for coal plows includes a roller assembly, a shaft assembly, and a clamping plate. Set up three sets of coaxial holes that rise in sequence towards the sprocket direction, install the three sets of pressure chain rollers in the positions of the above holes, and fix them with clamping plates.

Further, the clamping plate is provided with a gourd hole G, and after the gourd hole G is assembled with the shaft shoulder H of the shaft, it is fixed on the outer plate with screws and lock washers to achieve the purpose of fixing the shaft assembly.

Further, the shaft assembly includes a shaft and an oil cup, the center of the cross section of the shaft is provided with an oil injection blind hole M that communicates with the radial hole N, and the oil cup is installed on the blind hole M.

Further, the roller assembly includes a roller, a bushing and a positioning screw, the roller and the bushing adopt an interference fit, and the two are positioned by the positioning screw after assembly.

Further, the inner wall of the bushing is provided with an oil storage tank D and an oil storage tank E, which together with the oil filling blind hole M on the shaft, the radial hole N and the gap P after the assembly of the roller assembly and the shaft assembly constitute a pressure chain Lubrication channel of the device.

The three-roller chain pressing method for coal plows adopts the above-mentioned chain pressing device. The method includes: during the circular movement of the planing chain, three groups of chain pressing rollers periodically alternately press the planing chain, and at the same time Under the action of friction, the planer chain drives the roller assembly to rotate relatively around the shaft assembly.

Further, the method for pressing the chain as described above ensures that at least one link of the planer chain is in a compressed state at any time.

The beneficial effects of the present invention are as follows: breaking through the traditional technology of relative sliding and frictional contact of pressing chain blocks, realizing the alternating contact of three rollers rolling and friction contacting the pressing chain, solving the problem of up and down vibration of the planer chain when pressing the chain with a single pressing chain wheel, and overcoming the sliding The unnecessary abrasion of planing chain and chain pressing block caused by the pressing chain alleviates the martensitic cracks caused by the frictional heating of the sliding pressing chain, so that the present invention has the advantages of both the traditional pressing chain block and the single pressing chain wheel; in addition , Simple structural composition and stable structural form are conducive to prolonging the service life of the chain pressing device.

Description of drawings

The accompanying drawings constituting the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is a sectional view of the patent of the present invention along the moving direction of the planer chain;

Fig. 2 is a sectional view of A-A in Fig. 1 of the patent of the present invention;

Fig. 3 is an axial sectional view of the patent roller assembly of the present invention;

Fig. 4 is a sectional view of B-B in Fig. 2 of the patent of the present invention;

Fig. 5 is a schematic diagram of the patent chain pressing method of the present invention.

In the figure: 1. Tightening chain carriage, 2. Planer chain, 3. Roller assembly, 4. Shaft assembly, 5. Clamping plate.

Detailed ways

The technical solutions in the embodiments of the present invention are described completely and clearly below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

As shown in FIGS. 1 to 4 , the three-roller chain pressure device for a coal plow includes a roller assembly 3 , a shaft assembly 4 and a clamping plate 5 . The roller assembly 3 is composed of a roller 31, a bushing 32 and a positioning screw 33. The two bushings 32 are respectively installed at both ends of the roller 31, and an interference fit is used between the two, and then a threaded hole is processed at the junction of the two ends. , install the positioning screw 33 for positioning; the shaft assembly 4 is composed of a shaft 41 and an oil cup 42, wherein the center of the cross section of the shaft 41 has an oil filling blind hole M connected with three radial holes N, and the shaft 41 is close to the oil cup 42 One end is provided with a shaft shoulder H, and the oil cup 42 is installed on the blind hole M.

On the outer plate 11 and the inner plate 12 of the chain tensioning carriage 1 in the transition groove, 3 groups of coaxial holes that rise sequentially toward the sprocket direction are set, and the three groups of pressure chain rollers are installed in the positions of the above holes, and the clamping plate 5 It is fixed, and the roller assembly 3 is vertically arranged directly above the planer chain 2 and can rotate around the shaft assembly 4 flexibly. In the installation process of the present invention, the roller assembly 3 is first placed between the outer plate 11 and the inner plate 12, and is coaxial with the above-mentioned hole, and then the shaft assembly 4 passes through the outer plate 11, the roller assembly 3, and the inner plate 12 in sequence, Then clamp plate 5 is enclosed within on the axle 41, the gourd hole G on the clamp plate 5 is assembled with the shoulder H of the shaft 41, and clamp plate 5 is fixed on the outer plate 11 with screws and lock washers at last. After the assembly is completed, the oil cup 42, the oil injection hole M, the radial hole N, the oil storage tank D and the oil storage tank E, the gap P after the assembly of the roller assembly 3 and the shaft assembly 4 together constitute the lubrication channel of the pressure chain device, and can be injected inward Solid lubricants to achieve the purpose of reducing wear.

As shown in Figure 5, for the three-roller chain pressing method used in coal plows, the three sets of chain pressing rollers ①, ②, and ③ are sequentially arranged at the positions shown in the figure, and the upper edge of the plowing chain 2 is at the common tangent line of the three Above, analyze the seven position states K1~K7 in one cycle of alternating chain links of the planer chain 2. During this process, the planer chain 2 moves from right to left, and at the same time presses the roller assembly of the chain roller under the action of friction 3 Rotate clockwise around the shaft assembly 4, combined with Figure 5 and Table 1, it can be known that there is at least one set of pressure chain rollers pressing the planer chain 2 during the whole process. Since this is a periodic linear motion, it can be considered that there is pressure at any time The chain roller presses the planer chain 2 to effectively prevent the planer chain 2 from vibrating up and down.

Table 1 Description of the contact between the pressure chain roller and the planer chain in Figure 5

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 of ordinary skill in the art may 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 (7)

1. A three-roller chain pressure device for coal plows, characterized in that it includes a roller assembly (3), a shaft assembly (4) and a clamping plate (5), and tightens the chain carriage (1) in the transition groove Set 3 groups of coaxial holes that rise sequentially toward the sprocket direction on the outer plate (11) and inner plate (12), install the 3 sets of pressure chain rollers in the positions of the above holes, and use the clamping plate (5) to fix them fixed. 2. The three-roller chain pressure device for plows according to claim 1, characterized in that, the clamping plate (5) is provided with a gourd hole G, and the gourd hole G and the shoulder H of the shaft (41) Fix it on the outer plate (11) with screws and anti-loosening washers after mating and assembling. 3. The three-roller pressure chain device for coal plow according to claim 1, characterized in that, the shaft assembly (4) comprises a shaft (41) and an oil cup (42), and the shaft (41) There is an oil filling blind hole M connected with the radial hole N in the center of the cross section, and the oil cup (42) is installed on the blind hole M. 4. The three-roller type pressure chain device for coal plows according to claim 1, characterized in that, the roller assembly (3) comprises rollers (31), bushings (32) and set screws (33 ), an interference fit is adopted between the roller (31) and the axle sleeve (32), and the two are assembled to be positioned by a set screw (33). 5. The three-roller type pressure chain device for coal plow according to claim 4, characterized in that an oil storage tank D and an oil storage tank E are arranged along the inner wall of the bushing (32), and they are connected to the shaft (41) The oil filling blind hole M, the radial hole N, the gap P after the assembly of the roller assembly (3) and the shaft assembly (4) together constitute the lubrication channel of the chain pressing device. 6. a three-roller type chain pressing method for coal plow, is characterized in that, adopts the three-roller type chain pressing device for coal plow as claimed in claim 1, the method comprises: planer chain (2 ) During the cyclical movement, the 3 groups of pressure chain rollers alternately compress the planer chain (2) periodically, and at the same time, under the action of friction, the planer chain (2) drives the roller assembly (3) to make relative movements around the shaft assembly (4) turn. 7. The three-roller chain pressing method for coal plows according to claim 6, characterized in that at least one chain link of the plowing chain (2) is guaranteed to be in a compressed state at any moment.