CN217207302U - Pin shaft for coal mining machine, pin shaft assembly and rocker arm connecting structure of coal mining machine - Google Patents
Pin shaft for coal mining machine, pin shaft assembly and rocker arm connecting structure of coal mining machine Download PDFInfo
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- CN217207302U CN217207302U CN202220771639.XU CN202220771639U CN217207302U CN 217207302 U CN217207302 U CN 217207302U CN 202220771639 U CN202220771639 U CN 202220771639U CN 217207302 U CN217207302 U CN 217207302U
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- oil duct
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Abstract
The utility model relates to a pin shaft, a pin shaft assembly and a rocker arm connecting structure of a coal mining machine for a coal mining machine, wherein a groove is arranged on the outer surface of the middle part of a pin shaft body of the pin shaft, an axial oil duct and a radial oil duct are arranged in the pin shaft body, the inner end of the radial oil duct is communicated with the axial oil duct, and the outer end of the radial oil duct is opened on the bottom surface of the groove; the pin shaft assembly comprises the pin shaft and a shaft sleeve which are in clearance fit, the shaft sleeve is sleeved in the middle of the pin shaft body, a circumferential lubricating channel and at least one spiral lubricating channel are arranged on the inner wall of the shaft sleeve, the circumferential lubricating channel is communicated with the groove, and two ends of each spiral lubricating channel respectively extend to two ends of the shaft sleeve; the rocker arm connecting structure comprises a traction part shell, a coal mining machine rocker arm and the pin shaft assembly, wherein two end parts of the pin shaft are fixedly connected with the traction part shell, and the shaft sleeve is fixedly connected in an ear hole of a rocker arm ear seat. The utility model discloses can guarantee the intensity of round pin axle, can make again and lubricate between axle sleeve and the round pin axle for the hookup reliability of rocking arm and traction part promotes greatly.
Description
Technical Field
The utility model relates to a round pin axle, round pin axle subassembly and adoption this round pin axle subassembly realize articulated coal-winning machine rocking arm draw bail that coal-winning machine rocking arm and traction portion linked usefulness.
Background
Because the pin shaft assembly has high centering precision and strong impact resistance, the rocker arm and the traction part of the coal mining machine are often connected by adopting the structure. As the rocker arm swings up and down to cut coal, the rocker arm rotates relative to the pin shaft, and the pin shaft is provided with a lubricating channel for lubricating in order to reduce friction and wear. The existing lubricating channel on the pin shaft for the coal cutter comprises an axial lubricating channel, two radial lubricating channels and two circumferential lubricating channels, wherein the axial lubricating channel penetrates through two ends of the pin shaft, the inner ends of the two radial lubricating channels are communicated with the axial lubricating channel, and the outer ends of the two radial lubricating channels are respectively communicated with the two circumferential lubricating channels. However, in the actual use process, the pin shaft is found to have the phenomenon of breaking along the circumferential lubricating channel. When the pin shaft is broken, the rocker arm is changed from double-lug bearing to single-lug bearing, the rocker arm connecting lug is very easy to break, the connecting reliability is greatly reduced, serious production accidents can be caused in serious conditions, and serious economic losses are brought to mine parties and enterprises. The reason is that most of lubricating channels, particularly circumferential lubricating channels, weaken the impact resistance and the bearing capacity of the pin shaft.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a coal-winning machine is with round pin axle, round pin axle subassembly and coal-winning machine rocking arm draw bail, can guarantee the intensity of round pin axle, can make again and obtain lubricated between axle sleeve and the round pin axle for the hookup reliability of rocking arm and traction part promotes greatly.
The utility model discloses a main technical scheme has:
the pin shaft for the coal mining machine comprises a pin shaft body, wherein a groove is formed in the outer surface of the middle of the pin shaft body, an axial oil duct and a radial oil duct which are communicated with each other are arranged in the pin shaft body, the inner end of the radial oil duct is communicated with the axial oil duct, the outer end of the radial oil duct is opened on the groove bottom surface of the groove, and the two ends of the axial oil duct are opened on the two end surfaces of the pin shaft body.
The middle part of the pin shaft body is a cylinder, and the two end parts of the pin shaft body are truncated cones.
The axial oil duct and the radial oil duct are respectively provided with one, and the groove is provided with one position.
The axial oil duct and the radial oil duct do not pass through the axis of the pin shaft body.
The distance between the axis of the axial oil channel and the axis of the pin shaft body is preferably 1/2-2/3 of the radius of the pin shaft body.
The pin shaft assembly for the coal mining machine comprises a pin shaft and a shaft sleeve which are in clearance fit, wherein the pin shaft for the coal mining machine is adopted as the pin shaft, the shaft sleeve is sleeved in the middle of a pin shaft body, a circumferential lubricating channel and at least one spiral lubricating channel are arranged on the inner wall of the shaft sleeve, the circumferential lubricating channel is communicated with the groove, and two ends of each spiral lubricating channel respectively extend to two ends of the shaft sleeve.
The spiral lubricating channel is provided with two spiral lubricating channels.
The spiral directions of the two spiral lubricating channels are opposite.
The number of spiral turns of each of the spiral lubrication channels is preferably not greater than 1.
The coal mining machine rocker arm connecting structure comprises a traction part shell, a coal mining machine rocker arm and a pin shaft assembly for the coal mining machine, wherein two end parts of the pin shaft for the coal mining machine are fixedly connected with the traction part shell, and the pin shaft assembly is fixedly connected in an ear hole of a rocker arm ear seat of the coal mining machine rocker arm.
The utility model has the advantages that:
the arrangement of the axial oil duct and the radial oil duct in the pin shaft ensures the lubrication of the pin shaft assembly and reduces the weakening degree of the pin shaft strength, so that the occurrence of the breakage condition of the pin shaft can be reduced while the lubrication effect is ensured. The arrangement of the groove can ensure the communication of the lubricating channel between the pin shaft and the matched shaft sleeve to the maximum extent.
Through the matching design of the lubricating channels on the shaft sleeve and the lubricating channels on the pin shaft, the pin shaft assembly for the coal mining machine reduces the fracture sources of the pin shaft, increases the contact area of the oil channels on the pin shaft and the lubricating channels on the shaft sleeve to the maximum extent, and ensures the lubrication and the strength of the pin shaft assembly.
The risk of breakage of the pin shaft is reduced, and good lubrication can be kept, so that the connection reliability of the rocker arm connection structure of the coal mining machine is obviously improved.
Drawings
FIG. 1 is a schematic structural view of one embodiment of a pin shaft for a coal cutter;
FIG. 2 is an enlarged partial cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural view of one embodiment of a pin shaft assembly for a coal cutter;
FIG. 4 is an expanded view of one embodiment of the bushing;
reference numerals: 1. a pin shaft for the coal cutter; 11. a groove; 12. an axial oil passage; 13. a radial oil passage; 14. connecting holes of bolts; 2. a shaft sleeve; 21. a circumferential lubrication channel; 22. a helical lubrication channel.
Detailed Description
As shown in fig. 1 and 2, the utility model discloses a coal-winning machine is with round pin axle 1 (can be for short round pin axle), including the round pin axle body, be equipped with recess 11 on the middle part surface of round pin axle body, this internal axial oil duct 12 and the radial oil duct 13 that link up each other that are equipped with of round pin axle, the inner end intercommunication axial oil duct of radial oil duct, the outer end opening of radial oil duct is on the tank bottom surface of recess, and the both ends of axial oil duct open respectively on the both ends face of round pin axle body. The groove can be arranged to ensure the communication of the lubricating channel between the pin shaft for the coal mining machine and the matched shaft sleeve to the maximum extent.
The pin shaft body is internally provided with a bolt connecting hole 14 for connecting a through bolt during installation. Usually, the axis of the bolt connecting hole is superposed with the axis of the pin shaft body.
The length of the pin body is not too long due to the limitation of the structure of the traction part, and the diameter direction needs to be as large as possible due to the impact load from the rocker arm, so the length-diameter ratio of the pin body of the pin for the coal mining machine is preferably 1.5:1 to 2.5:1, and the length-diameter ratio of the pin body of the embodiment shown in the attached drawings is 2: 1.
The length of the groove along the axial direction of the pin shaft body is longer, the length L of the groove is far larger than the diameter phi b of the radial oil duct, the width of the groove along the tangential direction of the pin shaft body is shorter, and the width of an outer opening of the groove is usually slightly larger than the diameter phi b of the radial oil duct. In the embodiment shown in the drawings, the groove is an arc-shaped cylindrical groove with the curvature radius r, and the depth h22 of the groove is not too large, preferably about 2 mm.
The middle part of the pin shaft body is a cylinder and is used for being connected with a shell of a coal mining machine rocker arm; the two end parts of the pin shaft body are truncated cones, the diameters of the two end parts are smaller as the pin shaft body is closer to the end parts, the pin shaft body is used for being matched and connected with the traction part shell, and the pin shaft has the advantage of high centering precision.
The axial oil duct and the radial oil duct are respectively provided with one oil duct, and the groove is also provided with one position, so that the strength of the pin shaft is ensured.
Furthermore, the axial oil duct and the radial oil duct do not pass through the axis of the pin shaft body, namely the axial oil duct is deviated to one side relative to the axis of the pin shaft body, and the radial oil duct is arranged in the shortest length mode, so that the strength of the pin shaft is ensured, and the lubrication of the pin shaft is also ensured.
The distance h21 between the axial line of the axial oil channel and the axial line of the pin shaft body is preferably 1/2-2/3 of the radius of the pin shaft body, and the arrangement positions of the radial oil channel and the axial oil channel limited by the distance h21 can better guarantee the structural strength of the pin shaft body.
In this embodiment, the pin shafts have a left-right symmetrical structure in the view angle of fig. 1. Radial oil duct and recess all are located the left and right sides direction on the position placed in the middle.
As shown in fig. 3, 4, the utility model also discloses a round pin axle subassembly for coal-winning machine, including clearance fit's round pin axle 1 and axle sleeve 2, the round pin axle adopts the round pin axle is used to the coal-winning machine, the axle sleeve cover is established at the middle part of round pin axle body, be equipped with a circumference lubrication channel 21 and at least one spiral lubrication channel 22 on the inner wall of axle sleeve, the circumference lubrication channel with the recess is relative and communicate with each other, and the both ends of every spiral lubrication channel extend to respectively the both ends of axle sleeve. Because the circumferential lubricating channel is positioned in the middle of the axial direction, and two ends of the spiral lubricating channel extend to two ends of the shaft sleeve respectively, the spiral lubricating channel and the circumferential lubricating channel are crossed, so that the spiral lubricating channel is connected with the circumferential channel to ensure the penetration and grease storage among the lubricating channels on the shaft sleeve, and the lubricating effect is achieved. The pin shaft and the shaft sleeve can rotate relatively. The pin shaft 1 and the shaft sleeve 2 for the coal mining machine are lubricated by lubricating grease, the lubricating grease is injected from the end part of the pin shaft 1 for the coal mining machine, an axial oil duct, a radial oil duct and a groove on the pin shaft enter a circumferential lubricating channel and a spiral lubricating channel on the shaft sleeve in sequence, and the lubricating grease reserved in each oil duct of the pin shaft and each lubricating channel of the shaft sleeve is used for playing a lubricating role between the pin shaft and the shaft sleeve, so that the lubricating grease can be spread between the matching surfaces of the pin shaft body and the shaft sleeve.
The position of the circumferential lubricating channel is within the axial length range of the groove, so that the lubricating oil channels on the pin shaft are effectively communicated with the lubricating channels on the shaft sleeve. Further preferably, the circumferential lubrication channel is centrally aligned with the groove in the axial direction of the pin body.
Because both ends of the spiral lubricating channel respectively extend to both ends of the shaft sleeve, redundant grease, metal chips and the like can be squeezed away from both ends of the spiral lubricating channel and discharged.
The number of the spiral lubricating channels can be determined according to the requirement of the lubricating grease reserve, and in the embodiment shown in the figure 4, the spiral lubricating channels are two in number and are opposite in rotation direction. In fact, the direction of rotation of the helical lubrication channel is not required.
By means of the concept of the number of turns in the spiral spring, the number of turns of the spiral of the single spiral lubricating channel is not limited, but on the premise of meeting the lubricating requirement, the number of turns of the spiral lubricating channel is not more than 1 (as shown in fig. 4) as much as possible, so that the weakening of the structural strength of the shaft sleeve is reduced as much as possible. It is of course also possible to provide only one spiral lubrication channel but with a number of turns greater than 1.
The pin shaft assembly for the coal mining machine has the advantages that the circumferential lubricating channel is not arranged on the pin shaft body, so that the fracture source of the pin shaft is reduced, the weakening degree of the pin shaft strength is reduced, the contact area between the oil duct on the pin shaft and the lubricating channel on the shaft sleeve is increased to the maximum extent due to the spiral lubricating channel, the lubricating condition of the pin shaft assembly is obviously improved, and the strength of the pin shaft assembly is improved.
The utility model also discloses a coal-winning machine rocking arm draw bail, including traction portion casing, coal-winning machine rocking arm and for the coal-winning machine pin shaft subassembly, the both ends of pin shaft and traction portion casing fixed connection for the coal-winning machine, axle sleeve fixed connection is in the earhole of the rocking arm ear seat of coal-winning machine rocking arm. The impact force applied to the rocker arm acts on the shaft sleeve 2, the shaft sleeve 2 transmits the impact force to the pin shaft 1 for the coal cutter, and the pin shaft for the coal cutter transmits the impact force to the traction part.
Claims (10)
1. The utility model provides a round pin axle for coal-winning machine which characterized in that: including the round pin axle body, be equipped with the recess on the middle part surface of round pin axle body, this internal axial oil duct and the radial oil duct that link up each other that are equipped with of round pin axle, the inner end of radial oil duct communicates the axial oil duct, and the outer end opening of radial oil duct is on the tank bottom surface of recess, and the both ends opening of axial oil duct is on the both ends face of round pin axle body, the recess is longer along the axial direction's of round pin axle body length, and is shorter along the tangential direction width of round pin axle main part.
2. The pin for a coal cutter according to claim 1, wherein: the middle part of the pin shaft body is a cylinder, and the two end parts of the pin shaft body are truncated cones.
3. The pin for a coal cutter according to claim 2, wherein: the axial oil duct and the radial oil duct are respectively provided with one, and the groove is provided with one position.
4. The pin for a coal cutter according to claim 3, wherein: the axial oil duct and the radial oil duct do not pass through the axis of the pin shaft body.
5. The pin for a coal cutter according to claim 1, 2, 3 or 4, wherein: the distance between the axis of the axial oil channel and the axis of the pin shaft body is 1/2-2/3 of the radius of the pin shaft body.
6. The utility model provides a pin shaft subassembly for coal-winning machine which characterized in that: the pin shaft for the coal mining machine comprises a pin shaft and a shaft sleeve which are in clearance fit, the pin shaft is the pin shaft for the coal mining machine according to claim 1, 2, 3, 4 or 5, the shaft sleeve is sleeved on the middle of the pin shaft body, a circumferential lubricating channel and at least one spiral lubricating channel are arranged on the inner wall of the shaft sleeve, the circumferential lubricating channel is communicated with the groove, and two ends of each spiral lubricating channel extend to two ends of the shaft sleeve respectively.
7. The pin shaft assembly for a shearer loader of claim 6, wherein: the spiral lubricating channel is provided with two spiral lubricating channels.
8. The pin shaft assembly for a shearer loader of claim 7, wherein: the rotation directions of the two spiral lubricating channels are opposite.
9. The pin shaft assembly for a shearer loader of claim 6, wherein: the number of turns of each spiral lubricating channel is not more than 1.
10. The utility model provides a coal-winning machine rocking arm draw bail which characterized in that: the pin shaft assembly for the coal mining machine comprises a traction part shell, a coal mining machine rocker arm and the pin shaft assembly for the coal mining machine as claimed in claim 6, 7, 8 or 9, wherein two end parts of the pin shaft for the coal mining machine are fixedly connected with the traction part shell, and the pin shaft assembly is fixedly connected in an ear hole of a rocker arm ear seat of the coal mining machine rocker arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220771639.XU CN217207302U (en) | 2022-04-06 | 2022-04-06 | Pin shaft for coal mining machine, pin shaft assembly and rocker arm connecting structure of coal mining machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220771639.XU CN217207302U (en) | 2022-04-06 | 2022-04-06 | Pin shaft for coal mining machine, pin shaft assembly and rocker arm connecting structure of coal mining machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217207302U true CN217207302U (en) | 2022-08-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220771639.XU Active CN217207302U (en) | 2022-04-06 | 2022-04-06 | Pin shaft for coal mining machine, pin shaft assembly and rocker arm connecting structure of coal mining machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217207302U (en) |
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2022
- 2022-04-06 CN CN202220771639.XU patent/CN217207302U/en active Active
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