JP2011247041A - Swing reducer for construction machinery and construction machinery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a swing reducer for construction machinery with a lubricating oil management means which has an extremely simple and easy structure capable of inhibiting oil leakage, the increment of parts count and man-hour.SOLUTION: In the swing reducer, a swing hydraulic motor 33 is installed on the upper part of a reducer body 32 in which lubricating oil 31 is stored, and a transparent lubricating oil discharge hose 36 having flexibility is connected with a lubricating oil discharge port 34 via a drain cock 35 which is attached to the lubricating oil discharge port 34 provided at the lower part of the reducer body 32. The position near the top end of the transparent lubricating oil discharge hose 36 is detachably held by a stay 37 which is attached to the side surface of the swing hydraulic motor 33.

Description

  The present invention relates to a turning speed reducer for a construction machine provided with means for managing the oil level of lubricating oil and a construction machine having the turning speed reducer.

  As shown in FIG. 3, the swing speed reducer 14 for a construction machine has a swing hydraulic motor 16 attached to the upper portion of the speed reducer main body 15 and a gauge insertion pipe 17. The oil inspection rod type level gauge 18 inserted in the machine main body 15 is extracted, and the oil level of the lubricating oil in the speed reducer main body 15, that is, the oil amount is managed. A drain cock 19 for discharging lubricating oil is provided at the lower part of the speed reducer main body 15, and a lubricating oil discharge hose 20 for discharging the lubricating oil to the outside is connected to the drain cock 19.

  Further, as shown in FIG. 4, a connecting pipe 22 connected to the inside of the turning speed reducer 21 is installed on the lower peripheral wall portion of the turning speed reducer 21 for construction machinery, and this connecting pipe 22 is connected to the body (upper turning body). By attaching a see-through type level gauge 23 whose height is adjusted to the lubricating oil level position in the turning speed reducer 21 perpendicularly to the tip of the connecting pipe 22, There has been proposed a lubricating oil level gauge device that can check the amount of oil in the turning speed reducer 21 (see, for example, Patent Document 1).

  Furthermore, as a level gauge for engine oil of construction machinery, there is a level gauge installed in the vicinity of the door of the cab, and the drain of the bottom of the engine oil pan is connected to this level gauge with a communication pipe. (For example, refer to Patent Document 2).

JP-A-8-218424 (second page, FIG. 1) Japanese Patent Laying-Open No. 2005-30366 (page 3, FIG. 2)

  The conventional oil inspection rod type level gauge 18 shown in FIG. 3 is in a place where it easily interferes with an engine exhaust gas treatment device and the like, so it is difficult to access. By installing an engine exhaust gas purification device in the future, There is a concern that the accessibility to the oil inspection rod type level gauge 18 will become worse. Further, when the swing hydraulic motor 16 is increased in size, the installation place of the gauge insertion pipe 17 is restricted, which becomes a bottleneck when developing a hybrid construction machine in the future. Further, when the oil inspection rod type level gauge 18 is pulled out, the scattered oil may contaminate the periphery.

  Further, the lubricating oil level gauge device shown in FIG. 4 and the conventional engine oil level gauge are composed of the connecting pipe 22 or the communication pipe, the see-through type level gauge 23, and the pipe joint connecting them. There is a problem that oil leakage is likely to occur between these connecting portions, and the number of parts and man-hours increase, resulting in an increase in cost.

  The present invention has been made in view of the above points, and a swivel reducer for a construction machine including a lubricating oil management means having a very simple structure capable of suppressing oil leakage, an increase in the number of parts and man-hours, and the swivel. It aims at providing the construction machine which has a reduction gear.

  The invention described in claim 1 includes a reduction gear main body in which lubricating oil is stored, a turning hydraulic motor installed in an upper portion of the reduction gear main body, and a lubricating oil provided in a lower portion of the reduction gear main body. Construction comprising a flexible transparent lubricating oil discharge hose connected to the discharge port, and holding means for detachably holding the tip of the transparent lubricating oil discharge hose on the side surface of the swing hydraulic motor It is a turning reducer for machines.

  The invention described in claim 2 includes a lower traveling body, an upper revolving body that is turnable with respect to the lower traveling body, a working device mounted on a front portion of the upper revolving body, An engine room disposed behind the apparatus, and a swivel reducer for a construction machine according to claim 1, wherein the swivel reducer is provided on the upper swing body between the work device and the engine room to drive the upper swing body. Is a construction machine.

  According to the first aspect of the present invention, the tip of the flexible lubricating oil discharge hose having flexibility connected to the lubricating oil discharge port provided in the lower part of the speed reducer main body is installed on the upper part of the speed reducer main body. Since this holding means is detachably held on the side of the swivel hydraulic motor, the transparent lubricating oil discharge hose should be used as a level gauge device that manages the oil level and the degree of contamination of the lubricating oil in the reducer body. It can be used as the original lubricant drain hose that drains the lubricant in the reducer body to the outside by removing the tip of the transparent lubricant drain hose from the holding means and lowering it from the reducer body. Since one transparent lubricating oil discharge hose is also used as a level gauge device, it is possible to suppress the risk of oil leakage, the number of parts and the number of man-hours caused by the conventional see-through type level gauge. That can provide highly with lubricating oil management means simple structure for construction machines turning speed reducer, thereby the cost reduction.

  According to the invention described in claim 2, the construction machine provided on the upper swing body between the work device mounted on the front portion of the upper swing body and the engine room disposed behind the work device. Unlike a conventional oil inspection rod type level gauge, one transparent lubricating oil discharge hose that also serves as a level gauge device is an exhaust gas processing device that is located relatively above the engine room. The height can be adjusted so that the operator can inspect the oil level, etc., so that it is easy to access the lubricating oil discharge hose and improve workability. Even if the holding means is made smaller, it can be easily dealt with if the holding means is reduced in size, and there is no risk of fouling due to scattered oil when it is pulled out as in a conventional oil inspection rod type level gauge.

It is a side view which shows one Embodiment of the rotation reduction gear for construction machines which concerns on this invention. It is a side view of the construction machine carrying a turning reduction gear same as the above. It is a side view which shows the conventional rotation reducer for construction machines. It is a side view which shows the example which installed the lubricating oil level gauge apparatus in the conventional rotation reducer for construction machines.

  Hereinafter, the present invention will be described in detail based on the embodiment shown in FIGS.

  FIG. 2 shows a hydraulic excavator M as a construction machine. An upper swing body 13 is turnably provided on a lower traveling body 11 by a swing bearing 12 and is used for a construction machine for driving the upper swing body 13 to swing. A turning speed reducer (hereinafter simply referred to as a turning speed reducer) 14 is mounted on the upper turning body 13.

  A cab 26 and a work device 27 are mounted on the front portion of the upper swing body 13, and an engine or the like disposed behind the work device 27 is mounted on the rear portion of the upper swing body 13. An engine room 28 is installed, and an engine cover 29 is provided in an upper opening of the engine room 28.

  Between the cab 26 and the work device 27 and the engine cover 29, there is provided a platform plate (not shown) that serves as a scaffold for the worker. Can access the swivel reducer 14 located at

  FIG. 1 shows the turning speed reducer 14, in which a turning hydraulic motor 33 is installed at the upper part of a speed reducer main body 32 in which a speed reduction mechanism (planetary gear device) is provided and in which lubricating oil 31 is stored. A drain cock 35 is attached to the lubricating oil discharge port 34 provided at the lower portion of the speed reducer main body 32, and a flexible transparent lubricating oil discharge hose 36 is connected to the lubricating oil discharge port 34 via the drain cock 35. It is connected.

  A stay 37 as a holding means for detachably holding the tip of the transparent lubricating oil discharge hose 36 on the side surface of the swing hydraulic motor 33 is attached to the side surface of the swing hydraulic motor 33. The vicinity of the tip of the lubricating oil discharge hose 36 is held. The stay 37 is provided with a hose fixing mechanism capable of removing the hose such as a screw type, a latch type, and a clip type.

  The transparent lubricating oil discharge hose 36 is provided with upper and lower marks H and L indicating an appropriate oil level level range.

  A cap 38 is provided at the tip of the lubricating oil discharge hose 36, and the cap 38 closes the opening at the tip of the hose, preventing rainwater from entering the lubricating oil discharge hose 36. The cap 38 is provided with a small hole (not shown) for ensuring air permeability that does not hinder the change in the oil level in the lubricating oil discharge hose 36.

  A pinion 39 fitted to a shaft projecting from the inside of the speed reducer main body 32 is provided at the lower portion of the speed reducer main body 32 fixed to the upper swing body 13, and this pinion 39 is attached to the lower traveling body 11 side. Since the rotation gear is engaged with the inner gear 40 of the inner ring of the slewing bearing, the rotation decelerated by the speed reduction mechanism (planetary gear unit) built in the speed reducer main body 32 using the slewing hydraulic motor 33 as a rotational drive source is output to the pinion 39. Then, the upper swing body 13 that can be swung by the swing bearing 12 with respect to the lower traveling body 11 is swung.

  Next, the function and effect of this embodiment will be described.

  A drain lug 35 is attached to a drain cock 35 used for draining the lubricating oil of the speed reducer main body 32, and the tip of the lubricating oil drain hose 36 is held by a stay 37. Since this lubricating oil discharge hose 36 functions as a communication pipe, the oil level 31L and the dirt level equal to the lubricating oil 31 stored in the reducer main body 32 are reduced to this transparent lubricating oil discharge hose. Check visually from the outer periphery of the lubricating oil discharge hose 36 through 36.

  On the other hand, after closing the drain cock 35, the tip of the lubricating oil discharge hose 36 is removed from the stay 37 and extended downward toward a waste oil receiving container (not shown) installed on the lower side. Is opened, the lubricating oil 31 in the speed reducer body 32 is discharged to the outside.

  In this way, the distal end portion of the flexible transparent lubricating oil discharge hose 36 connected to the lubricating oil discharge port 34 provided at the lower portion of the speed reducer main body 32 is installed at the upper portion of the speed reducer main body 32. Since the stay 37 is detachably held on the side surface of the swing hydraulic motor 33, the transparent lubricating oil discharge hose 36 is used as a level gauge device for managing the oil level of the lubricating oil 31 in the reducer body 32 and the degree of contamination. The original lubricating oil that can be used and discharges the lubricating oil 31 in the speed reducer main body 32 to the outside by removing the tip of the transparent lubricating oil discharge hose 36 from the stay 37 and lowering it from the speed reducer main body 32. It can be used as a discharge hose, and the single transparent lubricating oil discharge hose 36 is also used as a level gauge device, so it suppresses the risk of oil leakage, the number of parts and the number of man-hours that occur in conventional transparent type level gauges. thing We can provide extremely comprising a lubricating oil management means simple structure turning speed reducer, a single lubricant discharge hose 36 by sharing the level gauge unit, thereby the cost reduction.

  Furthermore, unlike the conventional oil inspection rod type level gauge 18, it is not necessary to provide the gauge insertion tube 17 at the top of the speed reducer main body 15, and the space required for insertion / extraction is ensured unlike the conventional oil inspection rod type level gauge 18. It is only necessary to attach the tip of the transparent lubricating oil discharge hose 36 to the side surface of the swing hydraulic motor 33 with the stay 37, so the degree of freedom of the level gauge mounting position is high and design constraints are reduced. be able to.

  There is no need to insert / remove to / from the gauge insertion tube 17 unlike the conventional oil inspection rod type level gauge 18, and it is only necessary to visually inspect the transparent lubricating oil discharge hose 36 from the outer periphery, so the oil level of the lubricating oil In addition, it is possible to easily check the degree of contamination.

  Further, the turning deceleration provided on the upper swing body 13 between the mounting base of the work device 27 mounted on the front portion of the upper swing body 13 and the engine room 28 disposed behind the work device 27. In the machine 14, a single transparent lubricating oil discharge hose 36, which is also used as a level gauge device, is different from the conventional oil gauge type level gauge 18, and is an exhaust gas processing device located relatively above the engine room 28. Since the operator can inspect the oil level at that height, it is easy to access the lubricating oil discharge hose 36, improve workability, and improve the slewing hydraulic motor 33. However, the size of the stay 37 can be easily reduced, and there is no risk of contamination due to scattered oil when the stay 37 is pulled out, unlike the conventional oil inspection rod type level gauge 18.

  INDUSTRIAL APPLICABILITY The present invention can be used in industries related to the manufacture and sales of construction machinery turning speed reducers and construction machinery.

M Hydraulic excavator as a construction machine
11 Undercarriage
13 Upper swing body
14 Swivel reducer for construction machinery
27 Work equipment
28 Engine room
31 Lubricating oil
32 Reducer body
33 Swing hydraulic motor
34 Lubricating oil outlet
36 Lubricant drain hose
37 Stay as a holding means

Claims (2)

A reducer body in which lubricating oil is stored,
A swing hydraulic motor installed at the top of the reducer body,
A transparent transparent lubricating oil discharge hose connected to a lubricating oil discharge port provided in the lower part of the speed reducer body;
A swing speed reducer for a construction machine, comprising holding means for detachably holding the tip of the transparent lubricating oil discharge hose on a side surface of the swing hydraulic motor. A lower traveling body,
An upper swing body provided so as to be swingable with respect to the lower traveling body;
A working device mounted on the front of the upper swing body,
An engine room arranged behind the working device;
A construction machine comprising the turning speed reducer for a construction machine according to claim 1, which is provided on the upper swing body between the work device and the engine room and drives the upper swing body to swing.

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