Maintenance-free drum-type coal mining machine walking box

Abstract

The invention belongs to the technical field of coal mining machine walking box lubrication, and discloses a maintenance-free drum type coal mining machine walking box which is characterized in that an integrated intelligent lubrication system is adopted to replace a traditional manual oil injection mode, and the coal mining machine walking box is connected with an automatic grease injection device through a grease injection pipeline; a driving wheel coal wall side bearing, a driving wheel old pond side bearing and an idle wheel bearing are lubricated, and maintenance-free operation of the walking box of the coal mining machine in the production process is achieved; a lubricating groove provided with an oil dripping device is machined in the top of the walking box shell, an oil dripping lubricating device is integrated, and the problem that gears are seriously abraded due to poor lubrication is solved. The self-lubricating bearing is adopted for solving the problem that the lubricating grease filling work of the walking wheel assembly is difficult to operate, the lubricating problem under the complex working condition is solved, the self-lubricating bearing is selected in the walking wheel assembly, and manual oil filling can be omitted.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of the lubrication of a walking box of a coal mining machine, and particularly relates to a maintenance-free walking box of a drum-type coal mining machine. BACKGROUND

[0002] When the coal mining machine operates under the conditions of continuous load and dust enrichment, the lubrication parts of the bearings of the transmission system of the coal mining machine face a harsh working environment, which makes efficient lubrication technology a core element for ensuring the reliability of the equipment. However, in the actual production process, the underground maintenance team is limited by time constraints and the deviation of the execution of the lubrication process specification by the on-site operating personnel, and the abnormal state of discontinuous or complete absence of lubricating grease addition often occurs between related moving pairs. The open grease injection structure is easily invaded by coal dust particles, accelerating the process of oil channel blockage and grease oxidation deterioration. The walking box is long-term exposed to the working conditions of high-frequency alternating load, impact vibration and coal dust erosion, resulting in the problems of performance degradation and structural fatigue damage of the lubrication system. The traditional lubrication method relies on periodic grease injection maintenance by manual operation, and has systematic defects such as difficult accurate control of the oil injection period, easy blockage of the oil channel system, poor lubrication uniformity of the friction pair, and thus causes mechanical failures such as gear tooth breakage and bearing jamming. The cumulative effect of such lubrication failure or causes the wear of the moving pair, and thus causes the increase of the transmission system clearance and the deterioration of the transmission precision, which eventually evolves into a systematic mechanical failure, which seriously restricts the production efficiency of the coal mine.

[0003] With the continuous development of intelligent technology in the field of coal mining, the automatic control system of the coal mining mechanical equipment has been significantly optimized. However, in the lubrication link of the walking box, the traditional manual grease injection process is still used, and this operation mode has systematic technical defects: the manual grease injection efficiency is low and the injection period experience is strongly dependent, and problems such as low injection amount control accuracy are easy to occur, which seriously affects the lubrication effect of the transmission system of the walking box, causes invalid consumption of the lubricating grease or abnormal wear between the moving pairs, and is more difficult to meet the needs of the intelligent development of the fully mechanized coal mining face, so the maintenance-free technology research of the open transmission system of the walking box is imminent. SUMMARY

[0004] The purpose of the present application is to provide a maintenance-free walking box of a drum-type coal mining machine to solve the problems existing in the prior art.

[0005] To achieve the above purpose, the present application provides a maintenance-free walking box of a drum-type coal mining machine, which comprises: The integrated intelligent lubricating system is used to replace the traditional manual oil injection mode. The walking box of the coal mining machine is connected with the automatic oil injection device through the oil injection pipeline to complete the lubricating work of the drive wheel coal wall side bearing, the drive wheel old pond side bearing and the idler bearing, and to realize the maintenance-free operation of the walking box in the production process. The lubricating groove of the oil dripping device is processed and configured on the top of the walking box shell, and the oil dripping lubricating device is integrated to solve the problem of serious gear wear caused by poor lubrication. The self-lubricating bearing is selected in the walking wheel assembly.

[0006] The lubricating groove of the oil dripping device is processed and configured on the top of the walking box shell, and the oil dripping lubricating device is integrated. The device adopts modular design. The M24*1.5 internal hexagonal plug is configured as an oil injection hole on the upper cover plate. The double lubricating outlets are arranged at the lower part. The vertical alignment mechanism is used to realize the accurate centering with the center line of the drive wheel and the walking wheel tooth width, and to ensure the best coverage range of the gear oil.

[0007] Optionally, the multi-channel lubricating system is integrated in the walking box. The high-pressure oil pipe is used to realize the modular integration of the automatic oil injection device and the walking box. The lubricating system includes three directional lubricating branches (L1, L2, L3). The first branch L1 precisely connects the lubricating point of the idler bearing assembly. The second and third branches L2 and L3 cover the drive wheel old pond side bearing and the coal wall side bearing in different areas to realize the automatic lubrication of the key moving pairs of the walking box and the open transmission system.

[0008] Optionally, the lubricating channel L1 is connected with the oil injection port V1 in a through manner. The lubricating channels L2 and L3 are respectively connected to the preset oil injection interfaces V2 and V3 on the surface of the shell. Through the precise control of the integrated automatic oil injection control system, the precise and quantitative delivery of the lubricating grease along the predetermined path can be realized. The lubricating grease acts on the bearing of the idler assembly, the drive wheel coal wall side bearing and the old pond side bearing assembly, thereby realizing the complete automatic lubrication system. The working principle of the system is shown in Figure 4 .

[0009] Optionally, the automatic oil injection device is connected with the V3 oil injection interface on the shell of the walking box through the branch L3 to realize the lubrication of the coal wall side bearing. For the old pond side bearing, if the branch L2 and the V2 oil injection port on the shell of the walking box are used to complete the lubrication, the original bearing seat structure assembly needs to be improved and designed. A special oil injection channel is added in the bearing seat to enable the lubricating grease to be delivered to the inside of the bearing seat through the pipeline system, and finally the effective lubrication function of the old pond side bearing is realized.

[0010] Optionally, the new idler assembly adopts a double-mode lubricating system design. On the basis of retaining the traditional manual oil injection interface, the integrated automatic lubricating channel is added to the wear-resistant shaft sleeve and the cooperation surface of the idler shaft.

[0011] Optionally, the automatic grease injection device is connected with the V1 oil injection interface on the walking box shell through the branch L1, a special oil injection channel is additionally arranged in the idler assembly, so that the lubricating grease can be delivered to the bearing seat of the idler assembly through the pipeline system, and finally the automatic lubrication function of the idler bearing is realized, and the maintenance efficiency is greatly improved.

[0012] Optionally, the walking wheel assembly bearing adopts a self-lubricating bearing. The self-lubricating bearing is a sliding bearing without external lubricant, and the core design is to embed a solid lubricant in the bearing material. This design can continuously release lubricating components during operation, significantly reduce friction and wear, solve the lubrication problem under complex working conditions, and is particularly suitable for high cleanliness, high maintenance cost or extreme environment scenarios. It is a key component to improve the reliability and energy efficiency of equipment. The self-lubricating bearing is selected in the walking wheel assembly, and manual oil injection can be omitted.

[0013] The technical effects of the present application are: The integrated intelligent lubricating system is adopted to replace the traditional manual oil injection mode. The walking box of the coal mining machine is connected with the automatic grease injection device through the grease injection pipeline to complete the lubrication work of the driving wheel coal wall side bearing, the driving wheel old pond side bearing and the idler bearing, and the maintenance-free operation of the walking box of the coal mining machine in the production process is realized. The lubricating groove of the oil dripping device is processed and configured on the top of the walking box shell, and the oil dripping lubricating device is integrated to solve the problem of serious gear wear caused by poor lubrication. A self-lubricating bearing is adopted to solve the lubrication problem under complex working conditions. The self-lubricating bearing is selected in the walking wheel assembly, and manual oil injection can be omitted. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0015] The drawings forming a part of the present application are used to provide a further understanding of the present application, the illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the walking box of the coal mining machine in the embodiment of the present application; Figure 2 It is a structure schematic diagram of the oil dripping lubricating device in the embodiment of the present application; Figure 3 It is a connection schematic diagram of the automatic grease injection device and the walking box in the embodiment of the present application; Figure 4The schematic view of the oil injection interface in the embodiment of the present application; Figure 5 The schematic view of the improved bearing seat assembly in the embodiment of the present application; Figure 6 The schematic view of the improved idler assembly structure in the embodiment of the present application; Figure 7 The schematic view of the oil cup installation position.

[0016] Label explanation: 1, traction output shaft; 2, backing plate; 3, oil dripping device; 4, walking box shell; 5, idler assembly; 6, walking wheel assembly; 7, guide sliding shoe; 8, oil injection hole; 9, lubrication outlet; L1, idler assembly bearing grease injection channel; L2, driving wheel old pit side bearing grease injection channel; L3, driving wheel coal wall side bearing grease injection channel; V1, first oil injection port; V2, second oil injection port; V3, third oil injection port. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0018] In order to facilitate the understanding of the present application, the present application will be described more fully below in combination with the related drawings, and several embodiments of the present application are given. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only; Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing specific embodiments and is not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0020] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0021] As shown in Figures 1-7 , the present embodiment provides a maintenance-free drum-type coal mining machine walking box, which comprises a walking box and a grease injection device, a lubricating groove is formed in the top of the shell of the walking box, and a drip lubrication device is integrated; a plurality of oil injection holes are formed in the shell of the walking box, the grease injection device connects each oil injection hole through a high-pressure oil pipe to construct a multi-channel lubrication system, the multi-channel lubrication system comprises three directional lubrication branches, the first lubrication branch is connected to the lubrication point of the idler bearing assembly, and the second lubrication branch and the third lubrication branch cover the drive wheel, the old pond side bearing and the coal wall side bearing in different areas.

[0022] The key grease injection points of the walking box lubrication system include four components: the drive wheel coal wall side bearing, the drive wheel old pond side bearing, the idler bearing and the walking wheel bearing. In the current manual lubrication operation: the drive wheel coal wall side bearing is lubricated by the shell oil injection port I; the drive wheel old pond side bearing is lubricated by the bearing end cover oil injection port II; the idler bearing and the walking wheel bearing are respectively injected by the oil injection port III and the oil injection port IV for regular maintenance, as shown in Figure 1 .

[0023] The present embodiment explores the maintenance-free technology of the transmission system from two aspects of increasing the automatic drip oil device and the structural optimization design of the walking box shell 4 and the key components such as the gear assembly.

[0024] To solve the problem of serious gear wear caused by poor lubrication, a lubricating groove of the drip oil device 3 is processed and configured on the top of the walking box shell 4, and a drip lubrication device is integrated. The device adopts modular design, the upper cover plate is configured with a M24*1.5 internal hexagonal plug as the oil injection hole of the drip oil device, the lower part is provided with a double-lubrication outlet, the vertical alignment mechanism is used to realize accurate centering with the center line of the drive wheel and the walking wheel tooth width, and the best coverage range of gear oil is ensured. The structure of the drip lubrication device is shown in Figure 2 .

[0025] A lubricating groove of the drip oil device 3 is processed and configured on the top of the walking box shell 4, and a drip lubrication device is integrated. Through continuous oil film supply, the friction coefficient of the gear surface is effectively reduced, and a stable boundary lubrication layer is formed between the friction pair, effectively avoiding the risk of fastener failure under vibration working conditions.

[0026] The walking box of the present embodiment can realize accurate and quantitative delivery of lubricating grease along the predetermined path, and act on the bearing of the idler assembly 5 of the walking box, the raceway contact surface of the drive wheel coal wall side and old pond side bearing assembly, so as to realize a complete and automatic lubrication operation system.

[0027] To solve the technical problems of insufficient efficiency of grease injection operation and difficulty of manual grease injection operation, the application proposes to integrate a multi-channel lubrication system inside the walking box, and to use a high-pressure oil pipe to realize the modular integration of the automatic grease injection device and the walking box. The lubrication system includes three directional lubrication branches (L1, L2, L3): the first branch L1 precisely connects with the lubrication point of the idler bearing assembly; the second and third branches L2 and L3 cover the drive wheel old pond side bearing and the coal wall side bearing in different areas, realizing the automatic lubrication of the key moving pairs of the walking box and the open drive system. The working principle of the system is shown in Figure 3 , which shows the open drive system lubrication scheme of the walking box with an external automatic grease injection device.

[0028] According to the structural characteristics of the walking box automatic grease injection system, a multi-channel lubrication design is implemented inside the shell, and three independent channels are specifically constructed: the lubrication channel (L1) is connected with the shell oil inlet V1 in a through connection, and the lubrication channels (L2 and L3) are connected to the pre-set oil injection interfaces V2 and V3 on the surface of the shell, respectively. Through the precise regulation and control of the integrated automatic grease injection control system, the precise and quantitative delivery of the lubricating grease along the predetermined path can be realized, which acts on the bearing of the idler assembly 5, the drive wheel coal wall side and old pond side bearing assembly, thereby realizing a complete and fully automatic lubrication system. The working principle of the system is shown in Figure 4 .

[0029] The automatic grease injection device is connected with the V3 oil injection interface on the walking box shell 4 through the branch L3, realizing the lubrication operation of the coal wall side bearing. For the old pond side bearing, if the lubrication operation is to be completed through the branch L2 and the V2 oil injection port on the walking box shell 4, the original bearing seat structure assembly needs to be improved and designed: a special oil injection channel is added inside the bearing seat, so that the lubricating grease can be delivered to the inside of the bearing seat through the pipeline system, and finally the effective lubrication function of the old pond side bearing is realized. The improved bearing seat assembly is shown in Figure 5 .

[0030] The height adjustment function of the coal mining machine body can be realized by adding the idler assembly 5 to the walking box, which can meet the more extensive coal seam mining height adaptability requirements. Before the structure is optimized, the original idler assembly needs to be manually lubricated by injecting grease into the idler bearing during the equipment maintenance period. There are problems of low operation efficiency and high labor intensity. The automatic grease injection device is connected to the V1 oil injection interface on the walking box shell 4 through the branch L1. In order to realize the lubrication of the idler bearing, the original idler assembly structure needs to be improved and designed: a special oil injection channel is added inside the idler assembly 5, so that the lubricating grease can be delivered to the bearing seat inside the idler assembly 5 through the pipeline system, and finally the automatic lubrication function of the idler bearing is realized, which greatly improves the maintenance efficiency. The new type of idler assembly 5 after technical improvement adopts a double mode lubrication system design. On the basis of retaining the traditional manual oil injection interface, an integrated automatic lubrication channel is innovatively added to the wear-resistant shaft sleeve and the idler shaft cooperation surface. The improved idler assembly 5 structure is shown in Figure 6 .

[0031] The walking wheel assembly bearing usually adopts a self-aligning roller bearing type. During the daily maintenance and repair of the coal mining machine, the bearing needs to be regularly injected with lubricating grease through the oil cup position provided on the walking box shell 4. The specific oil cup position can be referred to Figure 7 . However, it is found in actual operation that the oil cup installation position is generally lower than the cable groove installation height, and the space layout between the walking box and the cable groove is relatively compact, which causes certain operation difficulty in lubricating grease injection work. The self-lubricating bearing is a sliding bearing that does not require external lubricant. The core design is to embed solid lubricant in the bearing material. This design enables it to continuously release lubricating components during operation, significantly reducing friction and wear, solving the lubrication problem under complex working conditions, and is particularly suitable for high cleanliness, high maintenance cost or extreme environment scenarios. It is a key component to improve the reliability and energy efficiency of the equipment. The self-lubricating bearing is selected in the walking wheel assembly 6, which can save manual oil injection.

[0032] In summary, the integrated intelligent lubrication system is adopted to replace the traditional manual oil injection mode in this embodiment. The walking box of the coal mining machine is connected with the automatic grease injection device through the grease injection pipeline, and the lubrication work of the drive wheel coal wall side bearing, the drive wheel old pond side bearing and the idler bearing is completed, realizing the maintenance-free operation of the walking box of the coal mining machine during production. The lubrication groove of the oil dripping device 3 is processed and configured on the top of the walking box shell 4, and the oil dripping lubrication device is integrated, solving the problem of serious gear wear caused by poor lubrication. A self-lubricating bearing is used to solve the lubrication problem under complex working conditions. The self-lubricating bearing is selected in the walking wheel assembly 6, which can save manual oil injection.

[0033] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A maintenance-free drum-type coal mining machine traveling box, characterized in that, The device includes a traveling box and a grease injection device. The top of the traveling box housing has a lubrication groove and an integrated drip lubrication device. The traveling box housing has several oil injection holes. The grease injection device is connected to each oil injection hole through a high-pressure oil pipe to form a multi-channel lubrication system. The multi-channel lubrication system includes three directional lubrication branches. The first lubrication branch is connected to the lubrication point of the idler wheel bearing assembly. The second and third lubrication branches cover the drive wheel, the old pit side bearing, and the coal wall side bearing in different areas.

2. The maintenance-free drum-type coal mining machine traveling box according to claim 1, characterized in that, The upper cover of the oil drip lubrication device uses a hexagonal screw plug as an oil injection hole, and a dual lubrication outlet is provided at the bottom. The oil drip lubrication device is precisely aligned with the tooth width center line of the drive wheel and the traveling wheel through a vertical alignment mechanism.

3. The maintenance-free drum-type coal mining machine traveling box according to claim 1, characterized in that, The bearing housing inside the traveling box is equipped with a bearing housing oil injection channel, which is connected to the second lubrication branch to achieve lubrication of the bearing on the old pond side.

4. The maintenance-free drum-type coal mining machine traveling box according to claim 1, characterized in that, The idler wheel assembly inside the traveling box is equipped with an idler wheel bearing oil injection channel, which is connected to the first lubrication branch to achieve lubrication of the idler wheel bearing.

5. The maintenance-free drum-type coal mining machine traveling box according to claim 4, characterized in that, The casing of the traveling gear box is provided with a grease injection port, which is used to manually add grease to the idler wheel bearing.

6. The maintenance-free drum-type coal mining machine traveling box according to claim 2, characterized in that, The bearings of the traveling wheels are self-lubricating bearings.

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