CN213513132U

CN213513132U - Maintenance-free rack wheel mechanism

Info

Publication number: CN213513132U
Application number: CN202022338270.7U
Authority: CN
Inventors: 孔岸; 张朝
Original assignee: Shaanxi Heli Machinery Engineering Co ltd
Current assignee: Shaanxi Heli Machinery Engineering Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-06-22
Anticipated expiration: 2030-10-20

Abstract

The utility model provides a non-maintaining rack wheel mechanism relates to mining machinery to solve the problem that artifical maintenance rack wheel was wasted time and energy and was influenced work efficiency. The maintenance-free rack and rail wheel mechanism comprises a rack and rail wheel, a pin shaft, a bearing and a first automatic filling device; the rack rail wheel is provided with an accommodating hole along the axial direction, the pin shaft is positioned in the accommodating hole, and the bearing is arranged between the pin shaft and the rack rail wheel; the pin shaft is internally provided with a first mounting cavity and a first filling channel which is communicated with the first mounting cavity and the accommodating hole; the first automatic filling device is arranged in the first mounting cavity and can automatically fill lubricating media into the bearing. The utility model discloses no longer need the workman to the manual filling lubricant of bearing, realized the non-maintaining of rack wheel.

Description

Maintenance-free rack wheel mechanism

Technical Field

The utility model relates to a mining machinery especially relates to a non-maintaining rack and pinion mechanism.

Background

The traveling mechanism is a key component of the coal mining machine and takes important tasks of moving and guiding the coal mining machine along a working face. The rack wheel is used as an actuating element in a traveling mechanism of the coal mining machine, the working surface condition and the environment are severe, and the rack wheel needs to be maintained in time to prolong the running time of the rack wheel.

The rack wheel mainly comprises a chain wheel, a gear, a bearing and the like, a manual maintenance mode is adopted at present, and each worker needs to manually fill a lubricating medium into the bearing before the coal mining machine is started so as to reduce the abrasion of the rack wheel and realize the maintenance of the rack wheel.

However, the manual maintenance of the rack wheel is time-consuming and labor-consuming, and the working efficiency is affected.

Disclosure of Invention

An object of the utility model is to provide a non-maintaining rack wheel mechanism to solve the artifical technical problem who maintains the rack wheel and waste time and energy and influence work efficiency.

Realize the utility model discloses the technical scheme of purpose as follows:

the maintenance-free rack and rail wheel mechanism comprises a rack and rail wheel, a pin shaft, a bearing and a first automatic filling device;

the rack rail wheel is axially provided with an accommodating hole, the pin shaft is positioned in the accommodating hole, and the bearing is arranged between the pin shaft and the rack rail wheel;

the pin shaft is internally provided with a first mounting cavity and a first filling channel for communicating the first mounting cavity with the accommodating hole;

the first automatic filling device is arranged in the first installation cavity and can automatically fill lubricating media into the bearing.

As a further improvement of the present invention, the first automatic filling device is followed the axial direction of the pin shaft is set.

As a further improvement of the present invention, the front end of the first automatic filling device has a first filling nozzle, and the outside of the first filling nozzle is provided with an external thread;

an internal thread is arranged at the joint of the first mounting cavity and the first filling channel to form a first thread section;

the first filling nozzle is in threaded connection with the first threaded section.

As a further improvement of the utility model, the maintenance-free rack wheel mechanism further comprises a second automatic filling device;

the rack wheel is provided with a second mounting cavity and a second filling channel for communicating the second mounting cavity with the accommodating hole;

the second automatic filling device is arranged in the second mounting cavity and can automatically fill lubricating media into the bearing.

As a further improvement of the present invention, the rack wheel is provided with a plurality of second installation cavities, and each second installation cavity is internally provided with the second automatic filling device;

a plurality of the second mounting cavities are in a circular array about an axis of the rack wheel at an end face of the rack wheel.

As a further improvement of the present invention, a second filling nozzle is provided at the front end of the second automatic filling device, and an external thread is provided outside the second filling nozzle;

an internal thread is arranged at the joint of the second mounting cavity and the second filling channel to form a second thread section;

and the second filling nozzle is in threaded connection with the second threaded section.

As a further improvement of the utility model, the maintenance-free rack wheel mechanism further comprises a pressure relief device;

the rack rail wheel is provided with a third mounting cavity and a pressure relief channel for communicating the third mounting cavity with the accommodating hole;

the pressure relief device is mounted in the third mounting cavity and used for relieving pressure of the accommodating hole.

As a further improvement of the utility model, the pressure relief device comprises a slide block, an elastic piece and a fixing piece;

one end of the elastic piece is connected with the sliding block, and the other end of the elastic piece is connected with the fixing piece; the fixing piece is arranged at the port of the third mounting cavity and is provided with a pressure relief hole; the outer wall of the sliding block abuts against the inner side wall of the third mounting cavity and slides along the telescopic direction of the elastic piece;

and a pressure relief groove is formed in the inner wall of the third mounting cavity, so that the fluid medium bypasses the sliding block and enters the position between the fixed part and the sliding block.

As a further improvement, the maintenance-free rack wheel mechanism further comprises a retainer ring, the retainer ring is installed on the inner wall of the accommodating hole and is pressed against the end surface of the outer ring of the bearing.

As a further improvement of the utility model, the maintenance-free rack wheel mechanism further comprises a shaft sleeve and two sealing rings;

the shaft sleeve is arranged between the bearing and the pin shaft, and a communication hole for communicating the first filling channel with the accommodating hole is formed in the shaft sleeve;

and the two sealing rings are arranged between the shaft sleeve and the pin shaft and are respectively positioned at two sides of the communicating hole.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model provides a non-maintaining rack and pinion mechanism sets up first installation cavity in selling the axle, installs first automatic filling device in first installation cavity to set up the first filling passageway that communicates first installation cavity and accommodation hole in selling the axle. First automatic filling device can be automatic and continuously outwards export lubricating medium after opening, and lubricating medium passes through the bearing of first filling passageway flow direction accommodate the downthehole, and to the bearing continuous lubrication, no longer need the workman to the bearing manual filling lubricating medium, realized the non-maintaining of rack wheel.

Drawings

Fig. 1 is a schematic structural diagram of a maintenance-free rack and pinion mechanism provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first automatic filling device according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a pressure relief device and a peripheral cross section provided in the embodiment of the present invention.

Icon: 1-a rack and pinion; 11-a second mounting cavity; 12-a second fill channel; 13-a third mounting cavity; 131-a pressure relief groove; 14-a pressure relief channel; 15-shaft sleeve; 2-a pin shaft; 21-a first mounting cavity; 22-a first filling channel; 3-a bearing; 4-a first automatic filling device; 41-cylinder body; 42-a first filling nozzle; 43-a piston; 44-a gas generating device; 5-a second automatic filling device; 6-a pressure relief device; 61-a slide block; 62-an elastic member; 63-a fixing member; 631-pressure relief vent.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

In the description of the present embodiments, it is to be understood that the terms "central," "axial," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The embodiment provides a maintenance-free rack and pinion mechanism, please refer to fig. 1 to 3 together. Fig. 1 is a schematic structural diagram of a maintenance-free rack and pinion mechanism provided in this embodiment; fig. 2 is a schematic structural diagram of a first automatic filling device provided in this embodiment; fig. 3 is a schematic structural view of the pressure relief device and the peripheral cross section provided in this embodiment.

As shown in fig. 1, the maintenance-free rack and pinion mechanism comprises a rack and pinion 1, a pin 2, a bearing 3 and a first automatic filling device 4. The rack wheel 1 is provided with an accommodating hole along the axial direction, the pin shaft 2 is positioned in the accommodating hole, and the bearing 3 is arranged between the pin shaft 2 and the rack wheel 1. The pin shaft 2 is provided with a first mounting cavity 21 therein and is provided with a first filling channel 22 communicating the first mounting cavity 21 with the accommodating hole. The first automatic filling device 4 is installed in the first installation cavity 21 and can automatically fill the lubricating medium into the bearing 3. The lubricating medium is a medium capable of lubricating the bearing 3, and is, for example, a lubricating oil or a grease.

The utility model provides a non-maintaining rack and pinion mechanism sets up first installation cavity 21 in round pin axle 2, installs first automatic filling device 4 in round pin axle 2's first installation cavity 21 to establish the first filling passageway 22 of intercommunication first installation cavity 21 and accommodation hole in round pin axle 2. The first automatic filling device 4 can continuously output the lubricating medium to the outside after being opened, the lubricating medium flows to the bearing 3 in the accommodating hole through the first filling channel 22, the bearing 3 is continuously lubricated, a worker is not required to manually fill the lubricating medium to the bearing 3, and maintenance-free of the gear wheel 1 is achieved.

The first automatic filling device 4 is a device capable of automatically and continuously filling the lubricating medium, and fig. 2 shows a specific structure of the first automatic filling device 4. Specifically, the first automatic filling device 4 includes a cylinder 41, a first filling nozzle 42, a piston 43, and a gas generating device 44; the gas generator 44 is mounted at the rear end of the cylinder 41 and can continuously generate gas; the first filling nozzle 42 is arranged at the front end of the cylinder body 41 and is communicated with the cylinder body 41; the piston 43 is positioned in the cylinder 41, the outer circular surface of the piston 43 is attached to the inner wall of the cylinder 41, and the piston 43 can slide in the cylinder 41; a lubricating medium is filled between the piston 43 and the first filling nozzle 42. When the first automatic filling device 4 works, the gas generating device 44 can continuously generate gas, the gas pushes the piston 43 to move towards the direction close to the first filling nozzle 42, the piston 43 pushes the lubricating medium in the cylinder 41 to flow out from the first filling nozzle 42, and the lubricating medium flowing out of the first filling nozzle 42 flows to the bearing 3 in the accommodating hole through the first filling channel 22, so that the bearing 3 is lubricated.

Of course, the first automatic filling device 4 may have other configurations than the specific configuration shown in fig. 2.

With continued reference to fig. 1, the first automatic filling device 4 is disposed along the axial direction of the pin 2 to facilitate replacement of the first automatic filling device 4. Specifically, the first mounting cavity 21 is arranged along the axial direction of the pin shaft 2, when the first automatic filling device 4 is replaced, only the first automatic filling device 4 which uses up the lubricating medium needs to be taken out from the end part of the pin shaft 2, and then the first automatic filling device 4 is mounted in the first mounting cavity 21 from the end part of the pin shaft 2, so that the pin shaft 2 does not need to be detached from the bearing 3, and the replacement of the first automatic filling device 4 is very convenient.

Fig. 1 shows a situation of two first automatic filling devices 4, two first mounting cavities 21 are axially formed in the pin 2, and the two first automatic filling devices 4 are respectively mounted in the two first mounting cavities 21. Of course, one, three, four, etc. other numbers of first automatic filling devices 4 may be installed in the pin 2, which is not limited in this embodiment.

It should be noted that the mounting direction of the first automatic filling device 4 is not limited to the axial direction of the pin 2, and may be mounted in other directions such as a radial direction, as long as the lubricating medium in the first automatic filling device 4 can flow into the receiving hole through the first filling channel 22 to lubricate the bearing 3.

The first automatic filling device 4 has a first filling nozzle 42 at the front end, and an external thread is provided on the outside of the first filling nozzle 42. The first mounting cavity 21 is provided with an internal thread at its connection with the first filling channel 22, forming a first threaded segment. The first fill nipple 42 is threadably connected to the first threaded section.

The first filling nozzle 42 is in threaded connection with the first threaded section, so that the first automatic filling device 4 is convenient to replace, meanwhile, the first automatic filling device 4 is more firmly installed in the pin shaft 2, and the first automatic filling device 4 is prevented from being separated from the first filling channel 22 to influence the lubrication of the bearing 3.

As shown in fig. 1, the maintenance-free rack and pinion mechanism further comprises a second automatic filling device 5. The rack wheel 1 is provided with a second mounting cavity 11 and a second filling channel 12 for communicating the second mounting cavity 11 with the accommodating hole. The second automatic filling device 5 is installed in the second installation cavity 11 and can automatically fill the lubricating medium into the bearing 3.

When the first automatic filling device 4 fills the bearing 3 with the lubricating medium, the second automatic filling device 5 can increase the filling amount of the lubricating medium, so that the bearing 3 is sufficiently lubricated, and the abrasion of the bearing 3 is further reduced. In addition, the second automatic filling device 5 can enable the lubricating medium to flow from the outer ring to the inner ring of the bearing 3, so that the distribution uniformity of the lubricating medium in the bearing 3 is improved, and the maintenance effect is enhanced.

The rack and pinion 1 comprises a gear and a chain wheel, the second automatic filling device 5 can be arranged on the gear, the second automatic filling device 5 can be arranged on the chain wheel, and the second automatic filling device 5 can be arranged on both the gear and the chain wheel.

It should be noted that the second automatic filling device 5 may have the same structure as the first automatic filling device 4, for example, the second automatic filling device 5 may have the specific structure shown in fig. 2. Of course, the second automatic filling device 5 may have a different specific structure from the first automatic filling device 4 as long as automatic and continuous filling of the lubricating medium is achieved.

In this embodiment, the rack wheel 1 is provided with a plurality of second mounting cavities 11, and each second mounting cavity 11 is internally provided with a second automatic filling device 5. A plurality of second mounting cavities 11 are arranged in a circular array around the axis of the rack wheel 1 at the end face of the rack wheel 1. Taking the orientation in fig. 1 as an example, the rack gear 1 has two end faces, the left end face being the end face of the sprocket facing outwards and the right end face being the end face of the gear facing outwards. Both can set up a plurality of second installation cavities 11 at the left side terminal surface of rack wheel 1, also can set up a plurality of second installation cavities 11 at the right side terminal surface of rack wheel 1, can also all set up a plurality of second installation cavities 11 at the left and right sides terminal surface.

The arrangement mode of the second installation cavities 11 enables the second automatic filling devices 5 to fill lubricating media from a plurality of angles, so that the bearings 3 are uniformly lubricated, and the maintenance effect of the gear wheel 1 is improved.

Of course, the rack wheel 1 can also be provided with only one second mounting cavity 11; the rack wheel 1 may also be provided with a plurality of second mounting cavities 11, which plurality of second mounting cavities 11 is not arranged in the above-described manner, for example a rectangular array of second mounting cavities 11 at the end face of the rack wheel 1.

The front end of the second automatic filling device 5 is provided with a second filling nozzle, and the outside of the second filling nozzle is provided with an external thread. The junction of the second mounting cavity 11 and the second filling channel 12 is provided with an internal thread forming a second threaded segment. The second filling nozzle is in threaded connection with the second threaded section

The second filling nozzle is in threaded connection with the second thread section, so that the second automatic filling device 5 is convenient to replace, meanwhile, the second automatic filling device 5 is more firmly installed on the gear rail wheel 1, and the second automatic filling device 5 is prevented from being separated from the second filling channel 12 to influence the lubrication of the bearing 3.

With simultaneous reference to fig. 1 and 3, the maintenance-free rack and pinion mechanism further comprises a pressure relief device 6. The rack wheel 1 is provided with a third mounting cavity 13 and a pressure relief channel 14 for communicating the third mounting cavity 13 with the accommodating hole. The pressure relief device 6 is mounted in the third mounting cavity 13 for relieving the receiving hole.

Lubricating media are filled in the accommodating hole of the rack wheel 1, when the rack wheel 1 works underground, the lubricating media in the accommodating hole are influenced by high temperature to expand in volume, so that the pressure in the accommodating hole is increased, the pressure relief device 6 is compressed to increase the space for accommodating the lubricating media so as to reduce the pressure in the accommodating hole, or the pressure relief device 6 is opened to release part of the lubricating media from the rack wheel 1, and then the internal pressure and the external pressure of the rack wheel 1 are balanced.

When the first automatic filling device 4 and/or the second automatic filling device 5 automatically fill the lubricating medium into the bearing 3, new lubricating medium enters the accommodating hole of the rack wheel 1 under the action of pressure, the volume and the pressure of the lubricating medium in the accommodating hole are increased, the pressure relief device 6 is compressed to increase the space for accommodating the lubricating medium so as to reduce the pressure in the accommodating hole, or the pressure relief device 6 is opened to release part of the lubricating medium from the rack wheel 1, so that the internal pressure and the external pressure of the rack wheel 1 are balanced.

Referring to fig. 3, the pressure relief device 6 of the present embodiment includes a slider 61, an elastic member 62, and a fixing member 63. The fixing member 63 is fixedly mounted at the port of the third mounting cavity 13, and the fixing member 63 is provided with a pressure relief hole 631. The outer wall of the sliding block 61 abuts against the inner side wall of the third mounting cavity 13 and slides along the extension direction of the elastic element 62. The inner wall of the third mounting cavity 13 is opened with a pressure relief groove 131 to allow the fluid medium to bypass the slider 61 and enter a position between the fixed member 63 and the slider 61. The elastic element 62 refers to a component having an elastic function, such as a spring, a spring plate, etc.; the fixing member 63 is a member capable of fixing the elastic member 62, such as a nut having a through hole.

The first automatic filling device 4 and/or the second automatic filling device 5 automatically fill the lubricating medium into the bearing 3, or the lubricating medium in the accommodating hole is influenced by high temperature, so that the volume and the pressure of the lubricating medium in the accommodating hole are increased, at the moment, the lubricating medium pushes the sliding block 61 to move towards the direction close to the fixing part 63, the elastic part 62 is compressed, the space for accommodating the lubricating medium is increased, and the pressure in the accommodating hole is reduced. If the volume and the pressure of the lubricating medium in the accommodating hole are increased more, when the sliding block 61 moves to the position of the pressure relief groove 131, the lubricating medium bypasses the sliding block 61 from the pressure relief groove 131 and flows out from the pressure relief hole 631 in the fixing member 63, so that the pressure in the accommodating hole is reduced rapidly. When the volume and the pressure of the lubricating medium in the accommodating hole are reduced, the compressed elastic piece 62 gradually extends and pushes the sliding block 61 to move away from the fixing piece 63, and the lubricating medium in the pressure relief channel 14 reenters the accommodating hole of the gear 1, so that the volume and the pressure of the lubricating medium in the accommodating hole are gradually increased.

Furthermore, a sealing ring is arranged on the outer side surface of the sliding block 61, so that the sliding block 61 and the inner wall of the third mounting cavity 13 are sealed, and the lubricating medium is prevented from flowing out from the space between the sliding block 61 and the inner wall of the third mounting cavity 13.

Continuing to refer to fig. 1, this non-maintaining rack and pinion mechanism still includes the retaining ring, and the retaining ring is installed in the inner wall of accommodation hole to support the terminal surface of pressing the outer lane of bearing 3, effectively prevented that vibrations from strikeing and causing bearing 3 to play on round pin axle 2.

As further shown in fig. 1, the maintenance-free rack and pinion mechanism further comprises a shaft sleeve 15 and two sealing rings. The shaft sleeve 15 is arranged between the bearing 3 and the pin shaft 2, and a communication hole for communicating the first filling channel 22 with the accommodating hole is formed in the shaft sleeve 15. The two sealing rings are arranged between the shaft sleeve 15 and the pin shaft 2 and are respectively positioned at two sides of the communicating hole.

The bushing 15 enables the gear wheel 1 to slide on the pin 2. Two sealing rings between the shaft sleeve 15 and the pin shaft 2 strengthen the sealing effect between the shaft sleeve 15 and the pin shaft 2 and prevent lubricating media from leaking between the shaft sleeve 15 and the pin shaft 2.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A maintenance-free rack and rail wheel mechanism is characterized by comprising a rack and rail wheel, a pin shaft, a bearing and a first automatic filling device;

2. The maintenance-free rack and pinion mechanism of claim 1, wherein the first automatic filling device is disposed along an axial direction of the pin shaft.

3. The maintenance-free rack and pinion mechanism as claimed in claim 1, wherein a first filling nozzle is arranged at the front end of the first automatic filling device, and an external thread is arranged outside the first filling nozzle;

4. The maintenance-free rack and pinion mechanism of any one of claims 1-3, further comprising a second automatic priming device;

5. The maintenance-free rack and rail wheel mechanism as claimed in claim 4, wherein a plurality of second mounting cavities are formed in the rack and rail wheel mechanism, and each second mounting cavity is internally provided with the second automatic filling device;

6. The maintenance-free rack and pinion mechanism as claimed in claim 4, wherein a second filling nozzle is arranged at the front end of the second automatic filling device, and an external thread is arranged outside the second filling nozzle;

7. The maintenance-free rack and pinion mechanism of claim 4, further comprising a pressure relief device;

8. The maintenance-free rack and pinion mechanism of claim 7, wherein the pressure relief device comprises a slider, an elastic member, and a fixing member;

9. The maintenance-free rack and pinion mechanism according to claim 1, further comprising a retainer ring that is mounted to an inner wall of the accommodation hole and presses against an end surface of the outer ring of the bearing.

10. The maintenance-free rack and pinion mechanism of claim 1, further comprising a bushing and two seal rings;