Walking wheel and walking system of coal mining machine

Abstract

The walking wheel of the coal mining machine comprises a wheel body and wheel teeth, the wheel teeth are evenly distributed on the outer edge of the wheel body in the circumferential direction, and the walking wheel of the coal mining machine is characterized in that meshing lines of meshing faces on the two sides of the wheel teeth are curves and comprise a connecting line, a push-slip contact line, a wear contact line and a transition line; the connecting line is arranged at the middle section of the meshing line; the number of the push-slide contact lines is two, and one ends of the two push-slide contact lines are connected with the two ends of the connecting line respectively. The number of the abrasion contact lines is two, and one ends of the two abrasion contact lines are connected with the other end of the sliding contact line. The number of the transition lines is two, and one ends of the two transition lines are connected with the other ends of the two abrasion contact lines respectively. The invention considers that the traveling wheel and the pin row can still be in normal linear contact engagement under the limit deflection angle to reduce the contact stress, and also considers that the traveling wheel and the pin row are engaged in a linear contact form to reduce the contact stress under the condition that the deflection angle is large due to abrasion of the pin row.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining, in particular to a coal mining machine traveling wheel and a traveling system. Background Art

[0002] When the coal mining machine is working normally, the pin row does not deflect, the traveling wheel moves forward in a straight line, the traveling wheel teeth are in straight line contact with the pin row, and the traveling wheel and the pin row are evenly stressed.

[0003] When the working surface is undulating or the push slide is not straight, the two pin rows will have a certain deflection angle, and the meshing between the shearer's travel wheel and the pin row will change from line contact to point contact, the force will increase and the load will be offset. When the working surface pushes too fast and causes the angle between the two pin rows to increase to the maximum allowable angle, the contact force between the travel wheel and the pin row is the largest. If the allowable stress of the material is exceeded, the plastic deformation and damage of the travel wheel and the pin row tooth surface will occur, greatly reducing the service life of the travel system.

[0004] After the pin row has been used for a period of time, due to the wear of the pin row mounting holes, the deflection angle between the two sections of the pin row will be greater than the factory allowable angle. If it is not replaced in time, the damage to the tooth surface of the walking system will be aggravated. Summary of the invention

[0005] The technical problem to be solved by the present invention is to design a coal mining machine travel wheel and travel system which can adapt to the fluctuation of working surface and the coal mining machine oblique cutting coal cutting working conditions.

[0006] In order to solve the above technical problems, the coal mining machine walking wheel of the present invention includes a wheel body and gear teeth evenly arranged along the circumferential direction on the outer edge of the wheel body, and is characterized in that the meshing lines of the meshing surfaces on both sides of the gear teeth are curves; wherein the meshing lines include: a connecting line; a push-and-slide contact line, the number of the push-and-slide contact lines is two, and one end of the two push-and-slide contact lines is respectively connected to the two ends of the connecting line; a wear contact line, the number of the wear contact lines is two, and one end of the two wear contact lines is respectively connected to the other end of the push-and-slide contact line; a transition line, the number of the transition lines is two, and one end of the two transition lines is respectively connected to the other end of the two wear contact lines.

[0007] The connecting line is a straight line.

[0008] The push-slide contact line is a straight line, and the angle between the push-slide contact line and the horizontal line is α, and α satisfies: α=90°-(X / 2)°, where X is the maximum deflection angle of the horizontal middle groove of the scraper.

[0009] The wear contact line is a straight line, and the angle between the wear contact line and the horizontal line is β.

[0010] β≤α.

[0011] The transition line is an arc or a curve with a continuously changing radius of curvature.

[0012] The traveling system includes a pin row assembly and coal mining machine traveling wheels.

[0013] The pin row assembly comprises a first pin row and a second pin row. The first pin row and the second pin row are respectively provided with engaging holes, and the engaging holes match the gear teeth.

[0014] The coal mining machine travel wheel of the present invention is composed of multiple sections of tooth profiles along the tooth width direction. On the one hand, the present invention considers that the travel wheel and the pin row can still be in normal line contact meshing to reduce contact stress under the extreme deflection angle, and on the other hand, considers that the travel wheel and the pin row are meshed in line contact to reduce contact stress when the deflection angle of the pin row is large due to wear. In addition, by observing the damage of the boundary tooth profile of the travel wheel, it can be judged whether the wear of the pin row installation hole becomes larger and a replacement suggestion can be given. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the walking system of the present invention;

[0017] Figure 2 for Figure 1 KK plane cross-sectional view;

[0018] Figure 3 It is a top view of the pin row without deflection and a partial enlarged view of the tooth meshing position of the present invention;

[0019] in Figure 3 a is a top view of the pin arrangement without deflection of the present invention, Figure 3 b is Figure 3 A partial enlarged view of the tooth meshing position in a.

[0020] Figure 4 It is a top view of the maximum allowable deflection angle α of the pin discharge factory and a partial enlarged view of the tooth meshing position of the present invention;

[0021] in Figure 4 a is a top view of the maximum allowable deflection angle α of the pin discharge from the factory of the present invention, Figure 4 b is Figure 4 A partial enlarged view of the tooth meshing position in a.

[0022] Figure 5 It is a top view of the deflection angle β of the pin row mounting hole after wear and a partial enlarged view of the tooth meshing position of the present invention.

[0023] in Figure 5 a is a top view of the pin row mounting hole of the present invention after the deflection angle β is worn, Figure 5 b is Figure 5 A partial enlarged view of the tooth meshing position in a.

[0024] Description of the reference numerals in the accompanying drawings of the traveling wheel and traveling system of the coal mining machine of the present invention:

[0025] 1- Coal mining machine travel wheel,

[0026] 11-Connection wire,

[0027] 12- Push and slide the contact line,

[0028] 13- Wear of contact line,

[0029] 14- Transition line,

[0030] 21-1st pin row,

[0031] 22-Second pin row. DETAILED DESCRIPTION

[0032] The intelligent air conditioning control system of the present invention is further described in detail below in conjunction with the accompanying drawings. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0033] refer to Figure 1 Combined with Figure 2 to Figure 5 The walking system of the present invention is mainly composed of a coal mining machine walking wheel 1 and a first pin row 21 and a second pin row 22. The coal mining machine walking wheel 1 is in the meshing side direction with the pin row, and the tooth shape along the tooth width direction is composed of multiple line segments, namely: a connecting line 11, located in the middle section, when the two pin rows are in the Figure 3 When the position is shown, the connection line 11 and the pin row are in the widest meshing position, which is the main load-bearing position under normal conditions. The push-slide contact line 12 is located on both sides of the connection line 11. There are two of them, and the angle between them and the horizontal direction is α, and α satisfies: α=90°-(X / 2)°, where X is the maximum deflection angle of the horizontal groove in the middle of the scraper. When the two pin rows are in the position as shown in the figure due to the push-slide too fast or other conditions, the two pin rows are in the position as shown in the figure. Figure 4In the position shown, the push-and-slide contact line 12 meshes with the corresponding position of the pin row, and the meshing point is still in line contact, which alleviates the situation of excessive local load and uneven force. The wear contact line 13 is located on the outside of the push-and-slide contact line 12, and there are 2 of them. The angle β with the horizontal direction is β, and β≤α. Although β≤α, β should not be too small, and the smaller β means greater equipment wear, which is harmful to the use of working surface equipment. Based on the limitation of the use of three machines on the entire working surface, β should be greater than α-(X / 2)°, and the closer to α, the lower the wear and the better the adaptability of the three machines. When the two sections of the pin row are in a state such as due to wear of the pin row mounting holes and other reasons Figure 5 In the position shown, the wear contact line 13 meshes with the corresponding position of the pin row, and the meshing point is still in line contact, which also alleviates the situation of excessive local load, uneven force and tooth damage. The transition line 14 is located at the outermost side in the tooth width direction, and there are two of them. It is the transition arc between the wear contact line 13 and the end face. Under normal conditions, the wear contact line 13 and the transition line 14 sections do not participate in the meshing. During work maintenance, if it is found through observation that the tooth shape of the wear contact line 13 and the transition line 14 sections is damaged, it is very likely that the pin row mounting hole has been worn and enlarged. It is recommended to replace the pin row according to the severity. It can be understood that the coal mining machine walking wheel 1 will mesh with the pin holes of the first pin row 21 and the second pin row 22.

[0034] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope of this application.

Claims

1. A coal mining machine travel wheel, comprising a wheel body and gear teeth, wherein the gear teeth are evenly arranged on the outer edge of the wheel body along the circumferential direction, characterized in that: The meshing lines of the meshing surfaces on both sides of the gear teeth are curves, and the meshing lines include connection lines, push-slip contact lines, wear contact lines and transition lines; wherein, The connecting line is arranged in the middle section of the meshing line; Push-and-slide contact wires, there are two push-and-slide contact wires, one end of each of the two push-and-slide contact wires is connected to the two ends of the connecting wire respectively; Wear contact line, the number of the wear contact lines is two, one end of the two wear contact lines is connected to the other end of the push-slip contact line respectively; Transition line: there are two transition lines, and one end of the two transition lines is connected to the other end of the two wear contact lines respectively.

2. The coal mining machine travel wheel according to claim 1, characterized in that: The connecting line is a straight line.

3. The coal mining machine travel wheel according to claim 2, characterized in that: The push-slide contact line is a straight line, and the angle between the push-slide contact line and the horizontal line is α, and α satisfies: α=90°-(X / 2)°, where X is the maximum deflection angle of the horizontal middle groove of the scraper.

4. The coal mining machine travel wheel according to claim 3, characterized in that: The wear contact line is a straight line, and the angle between the wear contact line and the horizontal line is β.

5. The coal mining machine travel wheel according to claim 4, characterized in that: β≤α。 6. The coal mining machine travel wheel according to claim 1, characterized in that: The transition line is an arc or a curve with a continuously changing curvature radius.

7. The traveling system includes a pin row assembly and a coal mining machine traveling wheel, characterized in that: The coal mining machine running wheel is a coal mining machine running wheel according to any one of claims 1 to 6.

8. The walking system according to claim 7, characterized in that: The pin row assembly comprises a first pin row and a second pin row, and engagement holes are respectively provided on the first pin row and the second pin row, and the engagement holes match the gear teeth in the traveling wheel of the coal mining machine.

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