External water cooling structure of top-mounted gearbox

Abstract

The utility model discloses an external water cooling structure of a top-mounted gearbox. The external water cooling structure comprises a gearbox shell and a cooling pipeline, a groove extending in the long edge direction of the gearbox shell is formed in the outer surface of the bottom wall of the gearbox shell, the cooling pipeline is matched with the groove, and the cooling pipeline is detachably connected into the groove through a locking piece. The cooling pipeline is communicated with a water cooling system on the loading machine, circulating cooling liquid of the water cooling system flows through the cooling pipeline, the cooling liquid takes away heat of a gearbox shell, the continuous heat dissipation effect is achieved, loads of a raw water cooling heat dissipation system and an air cooling heat dissipation system of the loading machine are reduced, and the heat dissipation performance of the loading gearbox is improved; and the probability that the upper gearbox is overheated is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gearbox cooling technical field, concretely relates to a kind of external water cooling structure of upper-mounted gearbox. BACKGROUND

[0002] The cooling mode of vehicle gearbox is mainly air cooling, which means that air flows through the gearbox shell naturally during vehicle driving, thereby taking away part of the heat of the gearbox. However, the upper-mounted gearbox of a loader is special, as the loader is in the same construction site for a long time, the air flowability is poor, the wind speed is low, and the heat of the gearbox taken away by air is small, so the air cooling effect is minimal.

[0003] To solve the above problems, the existing upper-mounted gearbox of a loader is increased with water cooling heat dissipation, and a cooling channel is added inside the side wall of the gearbox, relying on the coolant to take away most of the heat of the gearbox. However, when running for a long time in a high-temperature construction environment, the heat dissipation power of the air cooling and water cooling of the gearbox itself cannot meet the heat dissipation requirement, and there is still a problem of overheating of the gearbox. Therefore, the existing upper-mounted gearbox still has room for optimization. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides an external water cooling structure of upper-mounted gearbox, which comprises a gearbox shell and a cooling pipeline. The outer surface of the bottom wall of the gearbox shell is provided with a groove extending along the long side direction of the gearbox shell, and the cooling pipeline is matched with the groove and detachably connected in the groove through a locking piece.

[0005] The external water cooling structure of upper-mounted gearbox has the following advantages:

[0006] 1. The cooling pipeline is connected with the water cooling system of the loader, and the circulating coolant of the water cooling system flows through the pipeline, taking away the heat of the gearbox shell. The cooling system has a continuous heat dissipation effect, reduces the load of the original water cooling and air cooling systems of the loader, improves the heat dissipation performance of the upper-mounted gearbox, and reduces the probability of overheating of the upper-mounted gearbox.

[0007] 2. The cooling pipeline and the gearbox shell are detachable. If the original water cooling and air cooling systems of the loader can meet the heat dissipation requirement of the upper-mounted gearbox, the cooling pipeline can be removed or detached, and the external water cooling structure can be separated, which is more flexible and adaptable.

[0008] 3. Compared with the cooling channel inside the side wall of the upper-mounted gearbox, the external cooling pipeline has a simple structure and lower cost.

[0009] 4. Regardless of whether the loader is running or stationary, due to gravity, most of the lubricating oil inside the upper structure gearbox collects at the bottom of the gearbox, meaning most of the lubricating oil is on the bottom wall of the gearbox housing. The cooling pipes are fixed to the outer surface of this bottom wall, minimizing the heat transfer distance and thus improving heat dissipation efficiency.

[0010] 5. The groove increases the contact area with the cooling pipe, further improving heat dissipation efficiency.

[0011] A preferred embodiment of this invention is as follows: the locking element is a pressure plate, with through holes at both ends near the pressure plate. Bolts or screws pass through these through holes and connect to the gearbox, thereby pressing the cooling pipe tightly into the groove. Furthermore, protrusions are provided on both sides of the groove, clamping the cooling pipe within the groove. The cross-sectional shape of the groove and the two protrusions is U-shaped, allowing the cooling pipe to fit snugly within this U-shaped structure, resulting in a tighter fit between the cooling pipe and the groove.

[0012] The preferred embodiment of this invention is that the two protrusions are directly aligned with the two through holes of the pressure plate, and each protrusion has a threaded hole corresponding to the through hole. In effect, each protrusion is a stud with a threaded hole; simply adding the protruding and recessed portions to the existing gearbox housing mold reduces mold creation difficulty and cost. Furthermore, due to the significant vibration of the loader during construction, to further stabilize the cooling pipes, the pressure plate has two plates, each located near one end of the recess, and each plate corresponds to two protrusions with threaded holes. Using two sets of protrusions to lock the two ends of the cooling pipes prevents them from shaking and ensures a secure connection to the gearbox housing.

[0013] The preferred embodiment of this invention is as follows: Since the cooling pipe is located at the bottom of the upper gearbox, both ends of the cooling pipe are bent towards the same side of the gearbox housing. The cooling pipe must not be lower than the mounting hole at the bottom of the upper gearbox, thus ensuring that the cooling pipe does not interfere with the normal installation of the upper gearbox. Sealing rings are fitted onto the bent ends of the cooling pipe. Furthermore, the portion of the cooling pipe that contacts the groove is made of copper, aluminum, or stainless steel, which have good thermal conductivity and strong rust resistance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1Structure diagram of the externally connected water cooling structure of the upper-mounted gearbox Figure One ;

[0016] Figure 2 Structure diagram of the externally connected water cooling structure of the upper-mounted gearbox Figure Two ;

[0017] Figure 3 Split view of the externally connected water cooling structure of the upper-mounted gearbox.

[0018] The reference signs: gearbox shell 1, cooling pipeline 2, groove 3, arch part 4, sealing ring 5, protrusion 6, threaded hole 7, through hole 8, pressing plate 9, bolt 10. DETAILED DESCRIPTION

[0019] In view of the deficiencies in the prior art, the present utility model person has long-term research and a large number of practices, and the technical scheme of the present utility model is obtained. The technical scheme, its implementation process and principles will be further explained and described below in combination with the drawings and specific implementation cases in the embodiments of the present application.

[0020] It should be noted that the embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model, and cannot be understood as limiting the present utility model, and the described embodiments are only part of the embodiments of the present utility model, but not all the embodiments. Based on the embodiments in the present utility model, the present utility model covers any alternative, modification, equivalent method and scheme defined by the claims, and all other embodiments obtained by the ordinary skilled person in the art without creative labor, which belong to the protection scope of the present utility model.

[0021] In the description of the present application, unless otherwise explicitly specified and limited, the technical terms or scientific terms used should be understood as the usual meaning understood by the person skilled in the art in the field to which the present application belongs, and the terms such as "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, can also be detachable connection, can also be in contact connection or integral connection; for the ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0022] As shown in Figure 1 Embodiment one provides an externally connected water cooling structure of an upper-mounted gearbox, which comprises a gearbox shell 1 and a cooling pipeline 2. Unlike the existing built-in water cooling pipeline, the cooling pipeline 2 in the present embodiment is arranged outside the gearbox shell 1, and the specific connection mode is as follows:

[0023] As shown in Figure 3As shown in the drawings, a groove 3 extending along the long side direction of the gearbox housing 1 is provided on the outer surface of the bottom wall of the gearbox housing 1, the outer diameter of the cooling pipe 2 is the same as the diameter of the groove 3, and the cooling pipe 2 can be completely fitted in the groove 3 after being placed in the groove 3. Since the cooling pipe 2 is located at the bottom of the upper-mounted gearbox, the two ends of the cooling pipe 2 are respectively bent to the same side of the gearbox housing 1, which does not affect the installation process. The bent ends of the cooling pipe 2 are respectively provided with sealing rings 5, which are connected to the water cooling system of the loader, specifically the water channel directly connected to the cooling motor pump, which is convenient for arrangement and saves space. The purpose of fixing the cooling pipe 2 on the outer surface of the bottom wall is also to minimize the heat transfer distance, thereby improving the heat dissipation efficiency of the upper-mounted gearbox. The groove 3 part can also be slightly arched to the inside of the gearbox housing 1, that is, an arched part 4 is formed, thereby expanding the heat dissipation contact area with the lubricating oil. In order to further improve the heat dissipation efficiency, the material is selected in this embodiment, for example, the material of the part of the cooling pipe 2 in contact with the groove 3 is selected to be copper, aluminum or stainless steel with good heat conductivity and strong rust resistance. But not limited to these three materials, it can also be gold, silver and other materials with better heat conductivity.

[0024] Since the vibration amplitude of the loader during construction is larger than that of ordinary vehicles, the cooling pipe 2 in this embodiment is detachably connected to the groove 3 by locking members, specifically two protrusions 6 are respectively provided on both sides of the groove 3, the protrusions 6 on both sides are one-to-one opposite, and the two protrusions 6 on both sides of the groove 3 form a group. The cooling pipe 2 is clamped in the groove 3 by the two groups of protrusions 6. The cross-sectional shape of the groove 3 and the protrusions 6 on both sides is U-shaped, and the cooling pipe 2 is just clamped in this U-shaped structure, so that the cooling pipe 2 can be more closely fitted with the groove 3.

[0025] As shown in the drawings, Figure 2 The locking members in this embodiment are selected to be metal pressing plates 9, and two pressing plates 9 are respectively connected to the lower ends of the two groups of protrusions 6. Each pressing plate 9 is respectively provided with a through hole 8 at both ends, and each protrusion 6 is provided with a threaded hole 7 opposite to the through hole 8, and the threaded hole 7 is screwed in the corresponding threaded hole 7 through the through hole 8 by a bolt 10 or a screw, and then the pressing plate 9 locks the cooling pipe 2 in the U-shaped structure. But in order to overcome the shaking of the cooling pipe 2 caused by the vibration of the loader and affect the heat conduction efficiency, the pressing plate 9 in this embodiment is installed in an interference manner, and the pressing plate 9 will deform the surface of the water cooling pipe slightly after the four bolts 10 are tightened, thereby fixing the water cooling pipe to prevent it from moving and rotating.

[0026] The water cooling structure outside the upper-mounted gearbox provided by the embodiment is used to circulate the cooling liquid of the water cooling system through the pipeline, the cooling liquid takes away the heat of the gearbox shell 1, has the continuous heat dissipation effect, reduces the load of the original water cooling heat dissipation system and the air cooling heat dissipation system of the loader, is arranged in the compact space to maximize the utilization of the pipeline water cooling to reduce the working temperature of the upper-mounted gearbox, further improves the heat dissipation performance of the upper-mounted gearbox, the possibility of the overheat problem is low, and the service life of the upper-mounted gearbox is improved.

[0027] It should be understood that the above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary skilled in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, and any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. An external water-cooled structure for an upper gearbox, comprising a gearbox housing (1) and cooling pipes (2); characterized in that: The outer surface of the bottom wall of the gearbox housing (1) is provided with a groove (3) extending along the long side of the gearbox housing (1). The cooling pipe (2) is adapted to the groove (3), and the cooling pipe (2) is detachably connected to the groove (3) by a locking member.

2. The external water-cooling structure for an upper gearbox according to claim 1, characterized in that: The locking component is a pressure plate (9), with through holes (8) at both ends near the pressure plate (9). After passing through the through holes (8) with bolts (10) or screws, it is connected to the gearbox, thereby pressing the cooling pipe (2) into the groove (3) by the pressure plate (9).

3. The external water-cooling structure for an upper gearbox according to claim 2, characterized in that: The groove (3) has protrusions (6) on both sides, and the cooling pipe (2) is clamped in the groove (3) by the two protrusions (6).

4. The external water-cooling structure for an upper gearbox according to claim 3, characterized in that: The two protrusions (6) are directly opposite the two through holes (8) of the pressure plate (9), and each protrusion (6) is provided with a threaded hole (7) that is directly opposite the corresponding through hole (8).

5. The external water-cooling structure for an upper gearbox according to claim 4, characterized in that: The pressure plate (9) is provided in two parts, and the two pressure plates (9) are respectively close to the two ends of the groove (3), and each pressure plate (9) corresponds to two protrusions (6) with threaded holes (7).

6. The external water-cooling structure for an upper gearbox according to claim 1, characterized in that: The two ends of the cooling pipe (2) are bent toward the same side of the gearbox housing (1).

7. The external water-cooling structure for an upper gearbox according to claim 1, characterized in that: Sealing rings (5) are fitted at both ends of the cooling pipe (2).

8. The external water-cooling structure for an upper gearbox according to claim 1, characterized in that: The part of the cooling pipe (2) that contacts the groove (3) is made of copper, aluminum or stainless steel.

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