Power take-off window cover structure with reduced oil consumption and gearbox

Abstract

The utility model provides a kind of to reduce the power take-off window cover structure of oil quantity, belong to transmission housing structure technical field, including cover and cover body, through hole for being used to install power take-off window cover on transmission housing is opened on cover, cover body is recessed structure, the cavity structure of power take-off window cover inward recess is located inside the transmission housing of transmission, occupies the space volume of lubricating oil, under the premise of not influencing original structure, the demand of oil quantity reduction is considered, and transmission lubricating oil liquid level height is not reduced, the use reliability of transmission is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of transmission structure technology, specifically relating to a power take-off window cover structure for reducing oil injection volume and a transmission. Background Technology

[0002] With the steady growth of the global automotive market, the industry has higher demands for the performance of light truck transmissions (hereinafter referred to as light truck transmissions). High efficiency, low cost, energy saving and environmental protection have become hot topics in transmission design.

[0003] The amount of oil added is a crucial factor to consider. Reducing the oil level not only lowers temperature rise and reduces churning losses, thus improving transmission efficiency, but also maintains lower fuel consumption. Furthermore, a smaller oil level means lower operating costs for the customer. However, a reduced oil level also means a lower lubricating oil level inside the transmission. Gears, bearings, and other rotating parts that require lubrication may not be adequately immersed in the lubricating oil, leading to insufficient lubrication, excessive wear, and poor heat dissipation in these critical components. This poses a challenge to the reliability of light truck transmissions.

[0004] A power take-off (PTO) is a power output device that obtains power from the transmission and transmits it to onboard equipment. It is particularly important in the commercial vehicle sector. In light truck transmissions, the PTO is usually installed in a pre-reserved position on the side of the housing. Most light truck transmissions are designed to accommodate side PTOs, so the transmission housing has a pre-reserved position for installing a side PTO. However, most transmissions do not accommodate side PTOs, leaving a large cavity in the pre-reserved side PTO installation position on the transmission housing. This increases the amount of lubricating oil needed to maintain the lubricating oil level, affecting the performance of the light truck transmission and increasing operating costs. Utility Model Content

[0005] The purpose of this utility model is to provide a power take-off window cover structure that reduces the amount of oil injected, so as to overcome the technical problem that the lubricating oil injection volume and cost increase caused by the cavity reserved on the side power take-off installation position in the existing gearbox housing.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A power take-off (PTO) window cover structure for reducing oil injection volume, wherein the PTO window cover is mounted on the transmission housing, and the PTO window cover includes a cover surface and a cover body connected to the cover surface;

[0008] The cover surface has multiple through holes for fixing, and the cover body adopts an inward concave structure.

[0009] Furthermore, the cover and the cover body adopt an integrated structure.

[0010] Furthermore, the cover surface is an aluminum alloy cover surface, and the cover body is an aluminum alloy cover body.

[0011] Furthermore, the transmission housing has a reserved side power take-off mounting port, and the cover is disposed in the cavity at the reserved side power take-off mounting port.

[0012] Furthermore, the shape of the cover is the same as the cavity structure at the reserved side power take-off mounting port.

[0013] Furthermore, the number of fixing through holes is 6.

[0014] Furthermore, the fixing through hole is a threaded through hole.

[0015] Furthermore, the cover is provided with reinforcing ribs.

[0016] Furthermore, the bottom of the cover is chamfered.

[0017] A transmission includes a transmission housing with a power take-off window cover structure for reducing oil supply mounted on the transmission housing.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] This utility model provides a power take-off (PTO) window cover structure that reduces oil injection volume, including a cover surface and a cover body. The cover surface has a through hole for mounting the PTO window cover on the transmission housing. The cover body has a concave structure. The inwardly recessed cavity structure of the PTO window cover is located inside the transmission housing of the transmission, occupying the space volume of the lubricating oil. Without affecting the original structure, it takes into account the need to reduce the oil injection volume and does not reduce the transmission lubricating oil level, thus ensuring the reliability of the transmission.

[0020] Preferably, both the lid and the lid body are made of aluminum alloy, which is lightweight and inexpensive.

[0021] Preferably, reinforcing ribs are provided on the cover to effectively ensure the overall strength of the power take-off window cover.

[0022] Preferably, the shape of the cover is the same as the cavity structure at the reserved side power take-off mounting port, which ensures the requirement of reducing oil injection volume to the greatest extent. Attached Figure Description

[0023] Figure 1 This is a front view of a power take-off window cover structure with reduced oil injection capacity according to an embodiment of this utility model;

[0024] Figure 2 This is a side view of a power take-off window cover structure with reduced oil injection capacity according to an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the transmission housing structure;

[0026] Figure 4 This is a front view of the assembly of a power take-off window cover structure with reduced oil injection capacity according to an embodiment of this utility model;

[0027] Figure 5 This is a side view of the assembly of a power take-off window cover structure with reduced oil injection capacity according to an embodiment of this utility model;

[0028] Figure 6 This is the main view of the existing power take-off window cover assembly;

[0029] Figure 7 This is a side view of the existing power take-off window cover assembly.

[0030] Among them, 1. Transmission housing; 1-1. Reserved side PTO mounting port; 1-2. Threaded hole; 1-3. Transmission reverse gear interlocking wheel interface; 1-4. Oil plug; 1-5. Clutch slave cylinder interface; 1-6. Reversing support pin interface; 1-7. Second shaft mounting port; 1-8. Intermediate shaft interface; 1-9. Shift fork shaft interface; 2. PTO window cover; 2-1. Threaded through hole; 2-2. Cover surface; 2-3. Cover body; 2-4. Reinforcing rib; 3. Current window cover structure; 3-1. Fastening bolts. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Explanation of related terms

[0035] Transmission housing: The transmission housing is the basic supporting component of the gearbox, undertaking multiple functions such as housing transmission parts, transmitting power, and sealing and lubricating the system.

[0036] Power Take-Off (PTO): A PTO is a power output device that obtains power from the transmission and transmits it to onboard equipment. It is especially important in the commercial vehicle sector. In light truck transmissions, the PTO is usually installed in a pre-reserved position on the side of the housing.

[0037] In one embodiment of this utility model, such as Figure 2 As shown, a power take-off (PTO) window cover structure with reduced oil injection capacity is provided, including a cover surface 2-2 and a cover body 2-3, as shown. Figure 1 As shown, the cover 2-2 has multiple through holes for fixing the power take-off window cover 2 to the transmission housing 1; the cover body 2-3 is connected to the cover 2-2, and the cover body 2-3 adopts an inwardly recessed structure to fill the cavity where the power take-off is installed on the transmission housing 1, thereby reducing the amount of lubricating oil injected.

[0038] Specifically, the structure of the transmission housing 1 is as follows: Figure 3 As shown, a reserved side power take-off (PTO) mounting port 1-1 is provided on the transmission housing 1. The reserved side PTO mounting port 1-1 is used to correspond to the PTO window cover 2 involved in this utility model. Multiple threaded holes 1-2 are provided circumferentially on the edge of the reserved side PTO mounting port 1-1. Correspondingly, bolt through holes 2-1 are provided on the cover surface 2-2 of the PTO window cover 2, with the same number of threaded holes 1-2 as at the reserved side PTO mounting port 1-1. Optionally, the structure of the cover surface 2-2 is the same as the structure at the end face of the reserved side PTO mounting port 1-1 of the transmission housing 1.

[0039] On one side of the reserved side power take-off mounting port 1-1 in the transmission housing 1 is the transmission reverse gear interlocking interface 1-3. The transmission reverse gear interlocking interface 1-3 is a key transmission component for realizing the reversing function of the light truck transmission. Its core function is to change the rotation direction of the output shaft through the intermediate gear transmission. In a 4-speed light truck transmission, the transmission reverse gear interlocking interface 1-3 is usually arranged between the intermediate shaft reverse gear and the output shaft reverse gear, forming a transmission path of "intermediate shaft gear → transmission reverse gear interlocking interface → output shaft gear", so that the rotation direction of the output shaft is opposite to that of the forward gear.

[0040] An oil plug 1-4 is provided on the transmission housing 1 directly above the reverse gear interlocking wheel interface 1-3. As a key component of the transmission housing sealing system, the oil plug 1-4 is mainly used to seal the openings of the housing such as the drain hole and inspection hole to prevent lubricating oil leakage and facilitate maintenance operations. Its sealing performance directly affects the lubrication reliability of the transmission.

[0041] Above the reserved side power take-off mounting port 1-1 in the transmission housing 1 are four clutch slave pump interfaces 1-5. Among them, the clutch slave pump interface 1-5 serves as the mechanical connection hub between the hydraulic clutch system and the transmission, undertaking the dual functions of fixing the slave pump body and transmitting hydraulic thrust. In light truck transmissions, this interface is a key node for the coordinated operation of the transmission and the clutch.

[0042] A reversing support pin interface 1-6 is provided on one side of the clutch slave cylinder interface 1-5. The reversing support pin interface 1-6 is a key positioning component of the transmission shifting mechanism. It is mainly used to support the shift fork shaft or reversing device, ensuring the accurate positioning and axial support of the shift fork during the shifting process. It is the core node to ensure the smoothness of the transmission shifting.

[0043] like Figure 6 As shown, a two-shaft mounting port 1-7 is also provided on the transmission housing 1. Specifically, the two-shaft mounting port 1-7 is the output shaft mounting port. The two-shaft mounting port 1-7 is a key interface of the transmission system and is mainly used to support and fix the output shaft to realize the transmission of power from the transmission to the drive wheels.

[0044] Below the second shaft mounting port 1-7, there is an intermediate shaft interface 1-8. The intermediate shaft interface 1-8 is smaller than the second shaft mounting port 1-7. The intermediate shaft interface is a key load-bearing structure of the transmission housing. It is mainly used to install and support the intermediate shaft, ensuring that the intermediate shaft forms a precise parallel shaft transmission with the input shaft and output shaft.

[0045] Above the two-shaft mounting ports 1-7, there are shift fork shaft interfaces 1-9. The shift fork shaft interface is a key structure in the transmission housing for realizing gear shifting. It is mainly used to install and support the shift fork shaft and guide the shift fork shaft to move axially to drive the shift fork to engage different gears.

[0046] In another embodiment of this utility model, a power take-off window cover structure for reducing oil volume is provided. The power take-off window cover structure 2 is installed at the reserved side power take-off mounting port 1-1 on the transmission housing 1 and is fixed to the transmission housing 1 by bolts. The cover surface 2-2 and the cover body 2-3 are both made of aluminum alloy. The inwardly recessed cavity structure of the cover body 2-3 is located inside the transmission housing 1 of the transmission and occupies the space volume of the lubricating oil. Without affecting the original structure, the requirement of reducing the oil volume is taken into account, and the transmission lubricating oil level is not reduced, thus ensuring the reliability of the transmission.

[0047] like Figure 6 and Figure 7As shown, the existing window cover structure 3 is fastened to the gearbox housing 1 by fastening bolts 3-1, resulting in a large number of cavities between the existing window cover structure 3 and the gearbox housing 1. Therefore, a larger amount of lubricating oil is required to maintain the lubricating oil level.

[0048] like Figure 4 and Figure 5 As shown, the fastening bolt 3-1 is fastened to the threaded hole 1-2 on the transmission housing 1 through the bolt through hole 2-1 on the power take-off window cover 2 of this utility model, thereby assembling the power take-off window cover 2 of this utility model onto the transmission housing 1. Because the inwardly recessed cavity structure of the power take-off window cover 2 occupies the internal space of the transmission housing 1, a large amount of cavity structure is not formed between the power take-off window cover 2 and the transmission housing 1. The cavity structure is occupied by the cavity structure of the power take-off window cover 2, which reduces the amount of oil injected, lowers the temperature rise, and reduces the oil churning loss without affecting the original structure, thereby improving the transmission efficiency and maintaining low fuel consumption. At the same time, although the amount of oil injected is reduced, the lubricating oil level inside the transmission does not decrease. The rotating parts such as gears and bearings that require lubrication can be effectively immersed in the lubricating oil, ensuring good lubrication and sufficient heat dissipation for the rotating parts, without affecting the reliability of the transmission.

[0049] Optionally, the cover 2-2 and the cover body 2-3 are an integral structure. The cover body 2-3 is provided with reinforcing ribs to ensure the overall structural strength of the power take-off window cover 2. The bottom of the cover body 2-3 is chamfered. The shape of the cover body 2-3 is the same as the cavity structure at the reserved side power take-off mounting port 1-1.

[0050] In addition, this utility model also provides a gearbox, including a gearbox housing 1, on which a power take-off window cover 2 structure for reducing oil injection volume is installed.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power take-off window cover structure for reducing oil injection volume, characterized in that, The power take-off window cover (2) is installed on the transmission housing (1). The power take-off window cover (2) includes a cover surface (2-2) and a cover body (2-3) connected to the cover surface (2-2). The cover (2-2) has multiple through holes for fixing, and the cover body (2-3) adopts a concave structure.

2. The power take-off window cover structure for reducing oil injection volume according to claim 1, characterized in that, The cover (2-2) and the cover body (2-3) adopt an integrated structure.

3. A power take-off window cover structure for reducing oil injection volume according to claim 1 or 2, characterized in that, The cover surface (2-2) is an aluminum alloy cover surface, and the cover body (2-3) is an aluminum alloy cover body.

4. The power take-off window cover structure for reducing oil injection volume according to claim 1, characterized in that, The transmission housing (1) has a reserved side power take-off mounting port (1-1), and the cover (2-3) is set in the cavity at the reserved side power take-off mounting port (1-1).

5. The power take-off window cover structure for reducing oil injection volume according to claim 4, characterized in that, The shape of the cover (2-3) is the same as the cavity structure at the reserved side power take-off mounting port (1-1).

6. The power take-off window cover structure for reducing oil injection volume according to claim 1, characterized in that, The number of through holes for fixing is 6.

7. The power take-off window cover structure for reducing oil injection volume according to claim 6, characterized in that, The fixing through hole is a threaded through hole (2-1).

8. The power take-off window cover structure for reducing oil injection volume according to claim 1, characterized in that, The cover (2-3) is provided with reinforcing ribs (2-4).

9. The power take-off window cover structure for reducing oil injection volume according to claim 1, characterized in that, The bottom of the cover (2-3) is chamfered.

10. A gearbox, characterized in that, Includes a transmission housing (1), on which a power take-off window cover (2) for reducing oil volume as described in any one of claims 1-9 is installed.

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