CN213392147U

CN213392147U - Toothed rail wheel in interference connection

Info

Publication number: CN213392147U
Application number: CN202022338281.5U
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: 2021-06-08
Anticipated expiration: 2030-10-20

Abstract

The utility model provides a rack wheel that interference is connected relates to mining machinery to the connection cooperation of solving the rack wheel does not fasten and the single thin technical problem of overall structure of sprocket root circle. This cogged rail wheel of interference connection includes gear, sprocket, round pin axle and bearing, and the gear sets up the installation hole that link up the gear along the axial, and the end face portion of sprocket is provided with the interference base member of a body coupling, and the interference base member is connected with installation hole interference, and the interference base member sets up the cavity that holds that links up the sprocket along the axial, and the round pin axle setting is holding the cavity in, and the epaxial round pin is located to the bearing housing, and gear and sprocket can rotate around the round pin axle. The utility model discloses an interference base member is connected with the interference of installation hole, makes the gear more fasten with being connected of sprocket cooperation, and the rack wheel no longer takes place self when the operation and strikes, and sprocket root circle overall structure's thickness and intensity are higher moreover, have realized the improvement to the impact resistance and the bearing capacity of rack wheel.

Description

Toothed rail wheel in interference connection

Technical Field

The utility model relates to a mining machinery especially relates to a cogged rail wheel that interference is connected.

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 consists of a chain wheel, a gear, a bearing and the like, is used as a main executing element in the traveling mechanism of the coal mining machine, and has the function of transmitting torque. In the actual operation process, the toothed rail wheel is required to bear larger traction force and impact load generated by sudden change of working noodle pieces, failure modes such as deformation of the toothed rail wheel, gear tooth breakage and the like are easy to occur, and therefore the toothed rail wheel is required to have high strength and high wear resistance so as to prolong the service life.

At present, the method of increasing the width of the gear and the radius of the gear root circle is adopted to improve the impact resistance and the bearing capacity of the gear rail.

However, the gear and the chain wheel are generally connected by bolts or splines, and the integral structure of the root circle of the chain wheel is single and thin, and the impact resistance and the bearing capacity are weak. And the connection and matching of the gear and the chain wheel are not tight enough, self impact can be generated during operation, and abrasion and deformation are easily caused.

Disclosure of Invention

An object of the utility model is to provide a rack wheel that interference is connected to solve the connection cooperation of rack wheel and not fasten and the single thin technical problem of overall structure of sprocket root circle.

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

the toothed rail wheel in interference connection comprises a gear, a chain wheel, a pin shaft and a bearing;

the gear is provided with an installation inner hole penetrating through the gear along the axial direction;

the end surface part of the chain wheel is provided with an integrally connected interference base body, and the interference base body is in interference connection with the installation inner hole;

the interference base body is axially provided with an accommodating cavity which penetrates through the chain wheel;

the pin shaft is arranged in the accommodating cavity, the bearing sleeve is arranged on the pin shaft, and the gear and the chain wheel can rotate around the pin shaft.

As a further improvement of the utility model, the rack wheel with interference connection also comprises an automatic filling device;

a first mounting cavity is axially arranged at the end part of the pin shaft, and a filling channel for communicating the first mounting cavity with the accommodating cavity is formed in the end part of the pin shaft;

the 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 utility model, the front end of the automatic filling device is provided with a filling nozzle, and the outside of the filling nozzle is provided with an external thread;

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

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

As a further improvement of the utility model, the rack wheel with interference connection also comprises a pressure relief device;

a second mounting cavity extending into the interference base body is axially formed in the chain wheel, and a pressure relief channel for communicating the second mounting cavity with the accommodating cavity is formed in the interference base body;

the pressure relief device is arranged in the second mounting cavity and can relieve pressure in the accommodating cavity.

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 second mounting cavity and is provided with a pressure relief hole; the outer wall of the sliding block is pressed against the inner side wall of the second 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 second 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 of the utility model, the toothed rail wheel with interference connection also comprises a shaft sleeve;

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

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

the utility model provides a rack rail wheel that interference is connected sets up the interference base member of a body coupling through setting up the installation hole in the gear and at the terminal surface portion of sprocket, and this interference base member is connected with installation hole interference. The connecting and matching of the gear and the interference base body are more tight, the rack wheel does not generate self impact during operation, the strength of the integral structure of the root circle of the sprocket is high, and the impact resistance and the bearing capacity are improved.

Drawings

Fig. 1 is a schematic structural diagram of an interference-connected rack wheel according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a gear and a sprocket separated from a rack wheel with interference connection according to an embodiment of the present invention;

fig. 3 is a schematic structural view of an interference connection between a gear and a sprocket that are separated from a rack and rail gear with interference connection according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an improved interference-connected rack wheel provided by an embodiment of the present invention;

fig. 5 is a schematic structural view of an automatic filling device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a pressure relief device and a peripheral cross section of an improved interference-connected rack gear according to an embodiment of the present invention.

In the drawings, 1-gear; 2-a sprocket; 3-a bearing; 4-a pin shaft; 5-automatic filling device; 6-a pressure relief device; 11-installing an inner hole; 21-interference base body; 41-a first mounting cavity; 42-a fill channel; 51-a cylinder body; 52-filling nozzle; 53-a piston; 54-a gas generating device; 61-a slide block; 62-an elastic member; 63-a fixing member; 211-a receiving cavity; 212-a second mounting cavity; 213-pressure relief channel; 214-a pressure relief groove; 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 should be understood that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely created for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present 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. "mounted" and "connected" are to be understood in a broad sense and may, for example, be fixedly connected, detachably connected, or integrally connected. 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 present embodiment provides an interference-connected rack wheel, please refer to fig. 1 to 6. Fig. 1 is a schematic structural diagram of the interference-connected rack wheel provided in this embodiment; FIG. 2 is a schematic structural diagram of a disassembled gear and a sprocket in the interference-connected rack wheel provided by the embodiment; FIG. 3 is a schematic structural diagram of an interference connection between a gear and a sprocket separated from a rack gear with interference connection provided in the present embodiment; FIG. 4 is a schematic structural view of the improved interference coupled gear rail provided in the present embodiment; fig. 5 is a schematic structural view of an automatic filling device according to an embodiment of the present invention; fig. 6 is a schematic structural diagram of a pressure relief device and a peripheral cross-section of the improved interference-connected rack gear provided in this embodiment.

Referring to fig. 1 to 3, the rack wheel with interference connection includes a gear 1, a sprocket 2, a bearing 3 and a pin 4. The gear 1 is provided with an installation inner hole 11 penetrating through the gear 1 along the axial direction. The end face portion of the chain wheel 2 is provided with an interference base body 21 which is integrally connected, and the interference base body 21 is in interference connection with the installation inner hole 11. Interference base member 21 sets up the cavity 211 that holds that link up sprocket 2 along the axial, and round pin axle 4 sets up in holding cavity 211, and round pin axle 4 is located to the bearing 3 cover, and gear 1 and sprocket 2 can rotate around round pin axle 4.

The utility model provides a rack wheel that interference is connected, set up installation hole 11 and set up the interference base member 21 of a body coupling in the terminal surface portion of sprocket 2 in gear 1, be connected with installation hole 11 interference through interference base member 21, make gear 1 more fasten with interference base member 21's connection cooperation, avoid rack wheel to take place gear 1 and interference base member 21 mutual impact when the operation, and 2 root circles of sprocket and interference base member 21 body coupling, make sprocket 2's overall structure intensity obtain the reinforcing, realized the impact resistance to rack wheel and bearing capacity's improvement.

The interference base body 21 is a convex structure integrally formed with the tooth root circle of the sprocket. Fig. 2 shows a specific structure of the interference base 21. Specifically, the interference base 21 is a cylindrical structure formed by extending the root circle of the sprocket 2 in the axial direction. Interference base member 21 can interference fit installation hole 11 to the realization is connected with the interference of sprocket 2 to gear 1, no longer need open bolt hole or spline on the root circle of sprocket 2, makes the radial thickness of the root circle of sprocket 2 bigger, does not destroy the overall structure of 2 root circles of sprocket moreover, therefore has improved 2 overall structure's of sprocket thickness and intensity.

Of course, the interference base 21 may have other structures besides the cylindrical structure shown in fig. 2, such as an external conical surface structure. It should be understood that the mounting bore 11 can be interference fit with the interference matrix 21 regardless of its configuration.

The utility model discloses when the equipment, adopt the technique of colding pressing to exert pressure at the radial outer wall periphery of interference base member 21 uniformly to make the diameter of interference base member 21 reduce in proper amount, adopt the hot pressing technique to exert pressure evenly at the inner wall periphery of installation hole 11 simultaneously, so that the radial diameter of installation hole 11 increases in proper amount. And then slowly extending the interference base body 21 into the installation inner hole 11 to connect the interference base body 21 with the installation inner hole 11, and applying appropriate pressure on the outer circular surface of the gear 1 to uniformly reduce the diameter of the gear 1 when the connection between the interference base body 21 and the installation inner hole 11 meets the requirement, so that the circumferential surface of the inner wall of the installation inner hole 11 is tightly attached to the circumferential surface of the outer wall of the interference base body 21, and the assembly is completed.

As shown in fig. 4, the interference-connected rack wheel further comprises an automatic filling device 5. The end of the pin 4 is provided with a first mounting cavity 41 along the axial direction, and a filling channel 42 communicating the first mounting cavity 41 with the accommodating cavity 211 is opened. The automatic filling device 5 is installed in the first installation cavity 41, and the automatic filling device 5 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.

In the rack wheel with the interference connection, a first installation cavity 41 is arranged in the pin shaft 4, the automatic filling device 5 is installed in the first installation cavity 41, and a filling channel 213 which communicates the first installation cavity 41 with the accommodating cavity 211 is arranged in the pin shaft 4. The automatic filling device 5 can continuously output the lubricating medium to the outside after being opened, the lubricating medium flows to the bearing 3 in the accommodating cavity 211 through the filling channel 213 to continuously lubricate the bearing 3, the lubricating medium is not required to be manually filled into the bearing 3 by workers, and maintenance-free of the interference-connected toothed rail wheel is realized. Moreover, the automatic filling device 5 is arranged along the axial direction of the pin shaft 4, so that the automatic filling device 5 is convenient to replace. Specifically, the first mounting cavity 41 is arranged along the axial direction of the pin shaft 4, when the automatic filling device 5 is replaced, only the automatic filling device 5 which uses up the lubricating medium needs to be taken out from the end part of the pin shaft 4, and then a new automatic filling device 5 is mounted in the first mounting cavity 41 from the end part of the pin shaft 4, so that the pin shaft 4 does not need to be dismounted from the bearing 3, and the replacement of the automatic filling device 5 is very convenient.

The automatic filling device 5 is a device capable of automatically and continuously filling the lubricating medium, and fig. 5 shows a specific structure of the automatic filling device 5. Specifically, the automatic filling device 5 includes a cylinder 51, a filling nozzle 52, a piston 53, and a gas generating device 54. The gas generator 54 is attached to the rear end of the cylinder 51 and can continuously generate gas. The filling nozzle 52 is provided at the front end of the cylinder 51 and communicates with the cylinder 51. The piston 53 is positioned in the cylinder 51, the outer circular surface of the piston 53 is attached to the inner wall of the cylinder 51, and the piston 53 can slide in the cylinder 51; a lubricating medium is filled between the piston 53 and the filling nozzle 52. When the automatic filling device 5 works, the gas generating device 54 can continuously generate gas, the gas pushes the piston 53 to move towards the direction close to the filling nozzle 52, the piston 53 pushes the lubricating medium in the cylinder body 51 to flow out from the filling nozzle 52, and the lubricating medium flowing out of the filling nozzle 52 flows to the bearing 3 in the accommodating cavity 211 through the filling channel 213, so that the bearing 3 is lubricated.

Of course, the automatic filling device 5 may have other configurations than the specific configuration shown in fig. 5.

Fig. 4 shows a case of two automatic filling devices 5, two first installation cavities 41 are formed in the axial direction of the pin 4, and the two automatic filling devices 5 are respectively installed in the two first installation cavities 41. Of course, the pin 4 may also be provided with one, three, four, and other numbers of automatic filling devices 5, which is not limited in this embodiment.

The front end of the automatic filling device 5 is provided with a filling nozzle 52, the outside of the filling nozzle 52 is provided with external threads, the joint of the first mounting cavity 41 and the filling channel 42 is provided with internal threads to form a threaded section, and the filling nozzle 52 is in threaded connection with the threaded section.

The filling nozzle 52 is in threaded connection with the threaded section, so that the automatic filling device 5 is convenient to replace, meanwhile, the automatic filling device 5 is more firmly installed in the pin shaft 4, and the automatic filling device 5 is prevented from being separated from the filling channel 42 to influence the lubrication of the bearing 3.

Referring to fig. 4 and 6, the interference coupled gear wheel further includes a pressure relief device 6. The sprocket 2 is internally provided with a second mounting cavity 212 extending into the interference base body 21 along the axial direction, the interference base body 21 is internally provided with a pressure relief channel 213 communicating the second mounting cavity 212 with the accommodating cavity 211, the pressure relief device 6 is mounted in the second mounting cavity 212, and the pressure relief device 6 can relieve the pressure in the accommodating cavity 211.

The containing cavity 211 of the rack wheel is filled with lubricating media, when the rack wheel works underground, the lubricating media in the containing cavity 211 is affected by high temperature to expand in volume, so that the pressure in the containing cavity 211 is increased, the pressure relief device 6 is compressed to increase the space for containing the lubricating media so that the pressure in the containing cavity 211 is reduced, or the pressure relief device 6 is opened to release part of the lubricating media from the rack wheel, and further the internal pressure and the external pressure of the rack wheel are balanced.

When the automatic filling device 5 automatically fills the lubricating medium into the bearing 3, new lubricating medium enters the accommodating cavity 211 of the rack wheel under the action of pressure, the volume and the pressure of the lubricating medium in the accommodating cavity 211 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 cavity 211, or the pressure relief device 6 is opened to release part of the lubricating medium from the rack wheel, so that the internal and external pressures of the rack wheel are balanced.

The detailed structure of the pressure relief device 6 in this embodiment is shown in fig. 6, and the pressure relief device 6 includes a slider 61, an elastic member 62, and a fixing member 63. One end of the elastic element 62 is connected with the sliding block 61, the other end of the elastic element 62 is connected with the fixing element 63, the fixing element 63 is installed at the port of the second installation cavity 212, the fixing element 63 is provided with a pressure relief hole 631, and the outer wall of the sliding block 61 abuts against the inner side wall of the second installation cavity 212 and slides along the telescopic direction of the elastic element 62. The inner wall of the second mounting cavity 212 is provided with a pressure relief groove 214 so that the lubricating medium bypasses the slider 61 and enters 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.

Because the automatic filling device 5 automatically fills the lubricating medium into the bearing 3 or the lubricating medium in the accommodating cavity 211 is affected by high temperature, the volume and the pressure of the lubricating medium in the accommodating cavity 211 are increased, at this time, 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 cavity 211 is reduced. If the volume and the pressure of the lubricating medium in the accommodating cavity 211 are increased more, and the sliding block 61 moves to the position of the pressure relief groove 214, the lubricating medium bypasses the sliding block 61 from the pressure relief groove 214 and flows out from the pressure relief hole 631 in the fixing member 63, so that the pressure in the accommodating cavity 211 is rapidly reduced. When the volume and the pressure of the lubricating medium in the accommodating cavity 211 are reduced, the compressed elastic element 62 gradually extends and pushes the sliding block 61 to move away from the fixing element 63, and the lubricating medium in the pressure relief channel 213 reenters the accommodating cavity 211 of the gear rail, so that the volume and the pressure of the lubricating medium in the accommodating cavity 211 are gradually increased.

As shown in fig. 4, the interference-connected toothed rail wheel further comprises a bushing 7. The shaft sleeve 7 is arranged between the bearing 3 and the pin shaft 4, and a communication hole for communicating the filling channel 42 with the accommodating cavity 211 is formed in the shaft sleeve 7. The bushing 7 enables the gear wheel to slide on the pin 4.

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. The toothed rail wheel in interference connection is characterized by comprising a gear, a chain wheel, a pin shaft and a bearing;

2. The interference connected gear wheel according to claim 1, further comprising an automatic filling device;

3. The interference-connected toothed rail wheel according to claim 2, characterized in that the front end of the automatic filling device is provided with a filling nozzle, and the outside of the filling nozzle is provided with an external thread;

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

4. An interference connected gear wheel according to claim 2 or claim 3 further comprising a pressure relief device;

5. The interference connected gear wheel according to claim 4, wherein said pressure relief means comprises a slider, an elastic member and a fixing member;

6. The interference connected gear wheel of claim 2, further comprising a bushing;