Engineering machinery driving device lubricating system and engineering machinery

Abstract

The utility model discloses an engineering machinery driving device lubricating system and engineering machinery. The engineering machinery driving device lubricating system comprises a speed reducer; a transmission device is arranged in the transmission device box body, the transmission device is connected with a speed reducer, the speed reducer is arranged at the top of the transmission device box body, and the bottom of the speed reducer is communicated with the top of the transmission device box body; and the oil pump is respectively communicated with the bottom of the transmission device box body and the top of the speed reducer and is used for sucking the lubricating oil in the transmission device box body and pumping the lubricating oil into the speed reducer. The lubricating oil in the transmission device box body is pumped to the top of the speed reducer through the oil pump, so that the lubricating oil finally flows back to the bottom of the transmission device box body, and active lubrication of all moving parts on the upper portion of the speed reducer and the upper portion of the transmission device box body is achieved. The lubricating system of the engineering machinery driving device is better in lubricating effect, abrasion of all moving parts in a speed reducer and a transmission device box body can be reduced, and the service life of the moving parts is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lubrication of construction machinery driving devices, and more specifically, to a lubrication system for a construction machinery driving device. In addition, the utility model also relates to a construction machinery including the above-mentioned lubrication system for a construction machinery driving device. Background Art

[0002] As a power component of construction machinery, the driving device plays an important role during the equipment construction process. For example, the power heads of various pile foundation construction equipment.

[0003] The driving device includes a power source, a speed reducer connected to the power source, and a transmission device connected to the speed reducer. Finally, the transmission device transmits the power output by the power source to the working device, such as a drill pipe or a drill bucket, etc., so that the working device performs corresponding work.

[0004] In the related art, both the speed reducer and the transmission device are lubricated by the splash lubrication method. That is to say, there is lubricating oil in the box body of each speed reducer and transmission device. When the speed reducer and the transmission device are working, the rotation of the moving parts inside the box bodies of the speed reducer and the transmission device drives the lubricating oil at the bottom of the box bodies of the speed reducer and the transmission device to splash, so that the splashing lubricating oil lubricates the components inside the speed reducer and the box body of the transmission device.

[0005] However, this lubrication method is prone to the phenomenon of poor lubrication, causing component wear and affecting the service life of the equipment.

[0006] Therefore, how to improve the lubrication effect and reduce component wear is an urgent problem to be solved by those skilled in the art at present. Summary of the Utility Model

[0007] In view of this, the purpose of the utility model is to provide a lubrication system for a construction machinery driving device, which can improve the lubrication effect and reduce component wear.

[0008] Another purpose of the utility model is to provide a construction machinery including the above-mentioned lubrication system for a construction machinery driving device, which has good lubrication effect for the speed reducer and the transmission device and is not easily worn.

[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0010] A lubrication system for a construction machinery driving device, comprising:

[0011] A speed reducer;

[0012] The transmission device housing has a transmission device inside it. The transmission device is connected to the speed reducer, and the speed reducer is provided on the top of the transmission device housing, and the bottom of the speed reducer communicates with the top of the transmission device housing;

[0013] An oil pump is respectively connected to the bottom of the transmission device housing and the top of the speed reducer, and is used to suck the lubricating oil in the transmission device housing and pump the lubricating oil to the speed reducer.

[0014] Optionally, at least one of the speed reducer and the transmission device housing is connected with a bladder energy storage device, and the bladder energy storage device is used to absorb the expanded air or part of the lubricating oil when the lubricating oil expands due to heat, and when the temperature of the lubricating oil decreases, the lubricating oil in the bladder energy storage device flows back to the speed reducer or the transmission device housing.

[0015] Optionally, at least one of the first oil circuit connecting the oil pump to the speed reducer and the second oil circuit connecting the oil pump to the transmission device housing is provided with a temperature regulating device, and the temperature regulating device is used to heat or cool the lubricating oil.

[0016] Optionally, the first oil circuit and / or the second oil circuit is provided with a temperature detection element, and the temperature detection element is used to detect the temperature of the lubricating oil;

[0017] The temperature detection element is connected to the temperature regulating device so that the temperature regulating device heats or cools the lubricating oil according to the detection result of the temperature detection element.

[0018] Optionally, at least one of the first oil circuit connecting the oil pump to the speed reducer and the second oil circuit connecting the oil pump to the transmission device housing is provided with a filter, and the filter has an alarm function to give an alarm when the filtering function of the filter cannot meet the requirements.

[0019] Optionally, it further includes:

[0020] A first pressure sensor is connected to communicate with the speed reducer or the transmission device housing, and is used to detect the pressure in the speed reducer or the transmission device housing.

[0021] Optionally, it further includes:

[0022] A second pressure sensor is provided in the first oil circuit connecting the oil pump to the speed reducer or the second oil circuit connecting the oil pump to the transmission device housing, and is used to detect whether the oil pump is working properly.

[0023] Optionally, a one-way valve is provided on the first oil circuit connecting the oil pump to the speed reducer, and the inlet of the one-way valve is connected to the oil pump.

[0024] Optionally, the oil pump is connected with a power element, and the power element and the main engine power unit of the construction machinery applying the lubrication system of the construction machinery drive device are integrated, or the power element is independent of the main engine power unit;

[0025] When the power element and the main engine power unit are integrated, when the main engine power unit starts, the oil pump starts to work;

[0026] When the power element is independent of the main engine power unit, the power element starts to work according to the power-on signal of the main engine power unit.

[0027] A construction machinery includes any one of the above-mentioned lubrication systems for construction machinery drive devices.

[0028] The lubrication system for construction machinery drive devices provided by the present utility model has the following beneficial effects:

[0029] During operation, the oil pump works to suck and pump the lubricating oil in the transmission device box to the upper part of the reducer, so that this part of the lubricating oil flows into the reducer from the upper part of the reducer, thereby lubricating the components at the upper part of the reducer. The lubricating oil pumped into the reducer from the upper part flows out from the bottom of the reducer under the action of gravity, enters the transmission device box from the top of the transmission device box, lubricates the moving parts in the transmission device box, and finally returns to the bottom of the transmission device box.

[0030] It can be seen that this lubrication system for construction machinery drive devices uses the suction and pumping actions of the oil pump to pump the lubricating oil in the transmission device box to the top of the reducer and make this part of the lubricating oil finally return to the bottom of the transmission device box. During this process, active lubrication of the components at the upper part of the reducer and the upper part of the transmission device box is achieved. Compared with the splash lubrication method in the related art, the lubrication effect of this lubrication system for construction machinery drive devices is better, the wear of the moving parts in the reducer and the transmission device box can be reduced, and the service life of the moving parts can be extended.

[0031] It can be understood that when the main engine power unit of the construction machinery applying this lubrication system for construction machinery drive devices starts, making the oil pump start to work synchronously can achieve the effect of timely or even early lubrication, and can avoid the situation that when the equipment is initially operated after long-term storage or the equipment runs slowly at a low speed, it is easy for the lubrication of the moving parts located at the upper part in the reducer 1 and the transmission device box to be insufficient. Therefore, this lubrication system for construction machinery drive devices can especially avoid the lubrication deficiency phenomenon during the initial operation or low-speed operation of the construction machinery, reduce the wear of the moving parts, and extend the service life of the moving parts.

[0032] Furthermore, in the lubrication system of the construction machinery drive device, by utilizing the suction and pumping action of the oil pump, the interaction of the lubricating oil in the reducer and the transmission device housing is realized. It can be understood that the running speed of the reducer is fast, and a large amount of heat will be generated during operation. Therefore, the temperature of the lubricating oil in the reducer is relatively high. While the speed of the transmission device in the transmission device housing is slow, and the heat dissipation area of the transmission device housing is large. Therefore, the temperature of the lubricating oil in the transmission device housing is low. Thus, it can be seen that the present utility model realizes the circulation and interaction of the lubricating oil in the transmission device housing and the reducer by pumping the lubricating oil in the transmission device housing into the reducer and finally returning the lubricating oil in the reducer to the transmission device housing. By taking advantage of the characteristics of the large volume and slow speed of the transmission device housing, it is beneficial for heat dissipation and impurity precipitation.

[0033] In addition, when splash lubrication is adopted in the related technology, sufficient lubricating oil needs to exist in each reducer and the transmission device housing to meet the requirement of driving the lubricating oil to splash when the moving parts move and lubricating each component. However, when the active lubrication is carried out by using the lubrication system of the construction machinery drive device provided by the embodiment of the present utility model, the amount of lubricating oil used can be correspondingly reduced, thus saving costs and protecting the environment.

[0034] Furthermore, since the bottom of the reducer is communicated with the top of the transmission device housing, when replacing the lubricating oil, only the oil filling port or the oil drain port on the transmission device housing needs to be opened to complete the oil draining and oil filling operations, enabling the synchronous oil draining and oil filling for the maintenance of the reducer and the transmission device housing, making the maintenance more convenient and with lower costs.

[0035] Moreover, the oil pump is respectively communicated with the bottom of the transmission device housing and the top of the reducer, and the bottom of the reducer is communicated with the top of the transmission device housing, forming a complete closed oil circuit circulation, which is beneficial for forming a fully enclosed lubrication.

[0036] The construction machinery provided by the present utility model includes the above-mentioned lubrication system of the construction machinery drive device and has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the related art, the following will briefly introduce the drawings required for the description of the embodiments or the related art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0038] Figure 1 It is the schematic diagram of the lubrication system of the construction machinery drive device provided by the specific embodiment of the present utility model.

[0039] Reference Signs:

[0040] 1 - Reducer; 2 - Transmission device housing; 3 - Oil pump; 4 - Bladder energy storage device; 5 - First oil circuit; 6 - Second oil circuit; 7 - Temperature regulating device; 8 - Temperature detection element; 9 - Filter; 10 - First pressure sensor; 11 - Second pressure sensor; 12 - Check valve; 13 - Power element. Detailed implementation manners

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] The core of the present invention is to provide a lubrication system for a construction machinery drive device, which can improve the lubrication effect and reduce the wear of components. Another core of the present invention is to provide a construction machinery including the above lubrication system for a construction machinery drive device, in which the lubrication effect of the reducer and the transmission device is good and it is not easy to wear.

[0043] Please refer to Figure 1 , an embodiment of the present invention provides a lubrication system for a construction machinery drive device, including a reducer 1, a transmission device housing 2 and an oil pump 3. A transmission device is provided inside the transmission device housing 2. The transmission device is connected to the reducer 1. The reducer 1 is arranged on the top of the transmission device housing 2, and the bottom of the reducer 1 communicates with the top of the transmission device housing 2; the oil pump 3 is respectively communicated with the bottom of the transmission device housing 2 and the top of the reducer 1. The oil pump 3 is used to suck the lubricating oil in the transmission device housing 2 and pump the lubricating oil into the reducer 1.

[0044] When the lubrication system for the construction machinery drive device works, the oil pump 3 works to suck and pump the lubricating oil in the transmission device housing 2 to the upper part of the reducer 1, so that this part of the lubricating oil flows into the reducer 1 from the upper part of the reducer 1, thereby lubricating the components in the upper part of the reducer 1. The lubricating oil pumped into the reducer 1 from the upper part of the reducer 1 flows out from the bottom of the reducer 1 under the action of gravity, enters the transmission device housing 2 from the top of the transmission device housing 2, lubricates the moving parts in the transmission device housing 2, and finally returns to the bottom of the transmission device housing 2.

[0045] It can be seen that the lubrication system of the construction machinery drive device uses the suction and pumping actions of the oil pump 3 to pump the lubricating oil in the transmission device housing 2 to the top of the speed reducer 1 and make this part of the lubricating oil finally flow back to the bottom of the transmission device housing 2. During this process, the active lubrication of the moving parts in the upper part of the speed reducer 1 and the upper part of the transmission device housing 2 is realized. Compared with the splash lubrication method in the related art, the lubrication effect of the lubrication system of the construction machinery drive device is better, which can reduce the wear of the moving parts in the speed reducer 1 and the transmission device housing 2 and improve the service life of the moving parts.

[0046] It can be understood that when the main engine power unit of the construction machinery applying the lubrication system of the construction machinery drive device starts, the oil pump 3 is started to work synchronously, which can achieve the effect of timely or even early lubrication, and can avoid the situation that the moving parts in the upper part of the speed reducer 1 and the transmission device housing 2 are not lubricated properly when the equipment is initially operated after long-term storage or when the equipment runs slowly at a low speed. Therefore, the lubrication system of the construction machinery drive device can especially avoid the poor lubrication phenomenon during the initial operation or low-speed operation of the construction machinery, reduce the wear of the moving parts, and extend the service life of the moving parts.

[0047] Furthermore, as can be seen from the above, the lubrication system of the construction machinery drive device realizes the interaction of the lubricating oil in the speed reducer 1 and the transmission device housing 2 by using the suction and pumping actions of the oil pump 3. It can be understood that the running speed of the speed reducer 1 is fast and a large amount of heat will be generated during operation, so the temperature of the lubricating oil in the speed reducer 1 is relatively high. While the speed of the transmission in the transmission device housing 2 is slow and the heat dissipation area of the transmission device housing 2 is large, so the temperature of the lubricating oil in the transmission device housing 2 is low. Thus, it can be known that in the embodiment of the present invention, by pumping the lubricating oil in the transmission device housing 2 into the speed reducer 1 and making the lubricating oil in the speed reducer 1 finally flow back into the transmission device housing 2, the circulation and interaction of the lubricating oil in the transmission device housing 2 and the speed reducer 1 are realized, and the characteristics of the large volume and slow speed of the transmission device housing 2 can be utilized, which is beneficial to heat dissipation and impurity precipitation.

[0048] In addition, when using splash lubrication in the related art, it is necessary to have sufficient lubricating oil in each speed reducer 1 and transmission device housing 2 to meet the requirement of driving the lubricating oil to splash when the moving parts move to lubricate each component. When using the active lubrication of the lubrication system of the construction machinery drive device provided in the embodiment of the present invention, the amount of lubricating oil used can be correspondingly reduced, saving costs and protecting the environment.

[0049] Furthermore, since the bottom of the speed reducer 1 communicates with the top of the transmission device housing 2, when replacing the lubricating oil, it is only necessary to open the oil filling port or the oil drain port on the transmission device housing 2 to complete the oil draining and oil filling operations, enabling the speed reducer 1 and the transmission device housing 2 to drain and fill oil simultaneously during maintenance, making the maintenance more convenient and cost-effective.

[0050] Moreover, the oil pump 3 communicates with the bottom of the transmission device housing 2 and the top of the speed reducer 1 respectively, and the bottom of the speed reducer 1 communicates with the top of the transmission device housing 2, forming a complete closed oil circuit circulation, which is conducive to forming a fully enclosed lubrication.

[0051] In order to improve the lubrication effect, in some embodiments, a spraying device is provided at the top of the speed reducer 1, and the inlet of the spraying device is communicated with the lubricating oil pumped by the oil pump 3. That is to say, in this embodiment, the spraying device is used to spray the lubricating oil pumped by the oil pump 3 from the top of the speed reducer 1 into the interior of the speed reducer 1, which is conducive to making the distribution range of the lubricating oil wider and the spraying more uniform, thereby improving the lubrication effect on each moving part in the speed reducer 1 and the transmission device housing 2.

[0052] In addition, in order to make the speed reducer 1 and the transmission device housing 2 form a fully enclosed device and prevent the interior of the speed reducer 1 and the transmission device housing 2 from communicating with the outside world, in some embodiments, at least one of the speed reducer 1 and the transmission device housing 2 is connected with a bladder energy storage device 4, and the bladder energy storage device 4 is used to absorb the expanded air or part of the lubricating oil when the lubricating oil expands due to heat, and when the temperature of the lubricating oil decreases, the lubricating oil in the bladder energy storage device 4 flows back into the speed reducer 1 or the transmission device housing 2. That is to say, the bladder energy storage device 4 communicates with the interior of the speed reducer 1 and / or the transmission device housing 2. Thus, when the speed reducer 1 operates at high speed and the lubricating oil expands due to heat, the bladder energy storage device 4 can be used to absorb the expanded heat, avoiding the use of functional components such as a breather valve to balance the internal and external pressures of the speed reducer 1 and the transmission device housing 2, so that the interior of the speed reducer 1 and the transmission device housing 2 can be completely isolated from the external water vapor or pollutants, forming a fully enclosed lubrication system, effectively isolating external pollution. Therefore, the accelerated oxidation phenomenon of the lubricating oil caused by external water vapor or pollutants can be avoided, which is conducive to ensuring the performance of the lubricating oil, increasing the service life of the lubricating oil, and reducing the frequency of replacing the lubricating oil.

[0053] In addition, in some embodiments, at least one of the first oil passage 5 connecting the oil pump 3 to the speed reducer 1 and the second oil passage 6 connecting the oil pump 3 to the transmission device housing 2 is provided with a temperature regulating device 7 for heating or cooling the lubricating oil. That is to say, when the oil pump 3 is operating, when the lubricating oil flows through the temperature regulating device 7, the temperature regulating device 7 can heat or cool the lubricating oil, so that the lubricating oil can always operate within the optimal operating temperature range, thereby improving the service life of the lubricating oil, the speed reducer 1 and the moving parts in the transmission device housing 2, improving the transmission efficiency, and reducing energy loss.

[0054] It should be noted that the specific structure of the temperature regulating device 7 is not limited in this embodiment, as long as the temperature regulating device 7 can heat and cool the lubricating oil.

[0055] Furthermore, in order to facilitate the automatic control of the temperature regulating device 7, in some embodiments, the first oil passage 5 and / or the second oil passage 6 are provided with a temperature detecting element 8 for detecting the temperature of the lubricating oil; the temperature detecting element 8 is connected to the temperature regulating device 7 so that the temperature regulating device 7 heats or cools the lubricating oil according to the detection result of the temperature detecting element 8. That is to say, during operation, the temperature detecting element 8 is used to detect the temperature of the lubricating oil. When the temperature detecting element 8 detects that the temperature of the lubricating oil is lower than the preset low temperature value, the temperature regulating device 7 is enabled to turn on the heating function to heat the lubricating oil; when the temperature detecting element 8 detects that the temperature of the lubricating oil is higher than the preset high temperature value, the temperature regulating device 7 is enabled to turn on the cooling function to cool the lubricating oil.

[0056] Furthermore, in some embodiments, a filter 9 is provided on the first oil passage 5 connecting the oil pump 3 to the speed reducer 1 and the second oil passage 6 connecting the oil pump 3 to the transmission device housing 2. The filter 9 has an alarm function to issue an alarm when the filtering function of the filter 9 fails to meet the requirements. That is to say, in this embodiment, by providing the filter 9, the lubricating oil entering the speed reducer 1 is filtered by the filter 9 to ensure the cleanliness of the lubricating oil entering the speed reducer 1 and ensure the normal operation of the speed reducer 1. When the filter 9 alarms, it indicates that the filtering function of the filter 9 fails to meet the requirements. At this time, the filter 9 needs to be inspected to confirm whether it is necessary to replace the filter element of the filter 9 or replace the lubricating oil for maintenance.

[0057] In addition, in some embodiments, the lubrication system of the construction machinery drive device further includes a first pressure sensor 10. The first pressure sensor 10 is in communication with the inside of the speed reducer 1 or the transmission device housing 2, and is used to detect the pressure inside the speed reducer 1 or the transmission device housing 2. That is to say, in this embodiment, the first pressure sensor 10 is used to detect the pressure inside the speed reducer 1 or the transmission device housing 2, so as to judge whether the pressure inside the speed reducer 1 or the transmission device housing 2 is normal. When the pressure inside the speed reducer 1 or the transmission device housing 2 is abnormal, an alarm can be issued to prompt the operator to deal with it in time.

[0058] In addition, in some embodiments, the lubrication system of the construction machinery drive device further includes a second pressure sensor 11. The second pressure sensor 11 is arranged in the first oil path 5 connecting the oil pump 3 and the speed reducer 1 or the second oil path 6 connecting the oil pump 3 and the transmission device housing 2, and is used to detect whether the oil pump 3 is working properly. That is to say, in this embodiment, the second pressure sensor 11 is used to detect the pressure of the first oil path 5 or the second oil path 6 to judge whether the overall lubrication system of the construction machinery drive device is in a normal working state. If the pressure value detected by the second pressure sensor 11 does not meet the requirements, an alarm can be issued to prompt the operator to deal with it in time.

[0059] In addition, in some embodiments, a one-way valve 12 is provided on the first oil path 5 connecting the oil pump 3 and the speed reducer 1, and the inlet of the one-way valve 12 is connected to the oil pump 3. That is to say, in this embodiment, by arranging the one-way valve 12 on the first oil path 5, it is possible to prevent the lubricating oil from flowing back from the speed reducer 1 to the oil pump 3 and causing an impact on the oil pump 3, which is beneficial to improving the system stability and extending the service life of the oil pump 3.

[0060] In addition, in some embodiments, the oil pump 3 is connected to a power element 13. The power element 13 and the main engine power unit of the construction machinery using the lubrication system of the construction machinery drive device are integrated, or the power element 13 is independent of the main engine power unit. When the power element 13 and the main engine power unit are integrated, when the main engine power unit starts, the oil pump 3 starts to work. When the power element 13 is independent of the main engine power unit, the power element 13 starts to work according to the power-on signal of the main engine power unit. That is to say, in this embodiment, when the main engine power unit of the construction machinery starts, the oil pump 3 is driven to work through the power element 13, so that the lubrication system of the construction machinery drive device works, ensuring that in any case, the lubrication system of the construction machinery drive device enters the working state synchronously or even in advance before the speed reducer 1 and the transmission device start to operate, and ensuring that all components are fully lubricated.

[0061] It should be noted that when the power element 13 is independent of the main engine power unit, the power element 13 can be a hydraulic motor or an electric motor, etc.

[0062] It should be noted that the specific quantities of the speed reducer 1 and the transmission device housing 2 in the embodiments of the present utility model are not limited. The quantity of the speed reducer 1 can be one or at least two, and the quantity of the transmission device housing 2 can also be one or at least two. Those skilled in the art can set them according to actual needs.

[0063] In addition to the above-mentioned lubrication system for the construction machinery drive device, the present utility model also provides a construction machinery including the lubrication system for the construction machinery drive device disclosed in the above embodiments. For the structures of other parts of this construction machinery, reference may be made to the related art, which will not be elaborated herein.

[0064] The focus of this embodiment is to adopt the lubrication system for the construction machinery drive device disclosed in any one of the above embodiments, and it has the same beneficial effects as the above-mentioned lubrication system for the construction machinery drive device.

[0065] It should also be noted that in this specification, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0066] The various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0067] The above has introduced in detail the lubrication system for the construction machinery drive device and the construction machinery provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. A lubrication system for a construction machinery drive device, characterized in that, Comprising: Reducer (1); Transmission device housing (2) with a transmission device disposed therein. The transmission device is connected to the reducer (1). The reducer (1) is disposed on the top of the transmission device housing (2), and the bottom of the reducer (1) communicates with the top of the transmission device housing (2). Oil pump (3), which communicates with the bottom of the transmission device housing (2) and the top of the reducer (1) respectively, for sucking the lubricating oil in the transmission device housing (2) and pumping the lubricating oil into the reducer (1).

2. The lubrication system for the construction machinery drive device according to claim 1, characterized in that, At least one of the reducer (1) and the transmission device housing (2) is connected with a bladder energy storage device (4). The bladder energy storage device (4) is used for absorbing the expanded air or part of the lubricating oil when the lubricating oil expands due to heat, and when the temperature of the lubricating oil decreases, the lubricating oil in the bladder energy storage device (4) flows back into the reducer (1) or the transmission device housing (2).

3. The lubrication system for a construction machinery drive device according to claim 1 or 2, characterized in that, At least one of the first oil path (5) connecting the oil pump (3) to the reducer (1) and the second oil path (6) connecting the oil pump (3) to the transmission device housing (2) is provided with a temperature regulating device (7), and the temperature regulating device (7) is used for heating or cooling the lubricating oil.

4. The lubrication system of the construction machinery drive device according to claim 3, characterized in that, The first oil path (5) and / or the second oil path (6) is provided with a temperature detecting element (8), and the temperature detecting element (8) is used for detecting the temperature of the lubricating oil. The temperature detecting element (8) is connected to the temperature regulating device (7) so that the temperature regulating device (7) heats or cools the lubricating oil according to the detection result of the temperature detecting element (8).

5. The lubrication system for the construction machinery drive device according to claim 1 or 2, characterized in that, At least one of the first oil path (5) connecting the oil pump (3) to the reducer (1) and the second oil path (6) connecting the oil pump (3) to the transmission device housing (2) is provided with a filter (9). The filter (9) has an alarm function to give an alarm when the filtering function of the filter (9) cannot meet the requirements.

6. The lubrication system of the construction machinery drive device according to claim 1 or 2, characterized in that, Further comprising: First pressure sensor (10), which communicates with the inside of the reducer (1) or the transmission device housing (2), for detecting the pressure inside the reducer (1) or the transmission device housing (2).

7. The lubrication system for a construction machinery drive device according to claim 1 or 2, characterized in that, Further comprising: Second pressure sensor (11), which is disposed in the first oil path (5) connecting the oil pump (3) to the reducer (1) or the second oil path (6) connecting the oil pump (3) to the transmission device housing (2), for detecting whether the oil pump (3) is working properly.

8. The lubrication system for a construction machinery drive device according to claim 1 or 2, characterized in that, A check valve (12) is provided on the first oil path (5) connecting the oil pump (3) to the reducer (1), and the inlet of the check valve (12) is connected to the oil pump (3).

9. The lubrication system for the construction machinery drive device according to claim 1 or 2, characterized in that The oil pump (3) is connected with a power element (13). The power element (13) and the main engine power unit of the construction machinery applying the lubrication system of the construction machinery driving device are integrated, or the power element (13) is independent of the main engine power unit. When the power element (13) and the host power unit are integrated, when the host power unit starts, the oil pump (3) starts to work; When the power element (13) is independent of the host power unit, the power element (13) starts to work according to the power-on signal of the host power unit.

10. An engineering machinery, characterized in that, It includes the lubrication system for the construction machinery drive device according to any one of claims 1-9.

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