Lubricating oil circulating system for transition transmission case of automobile hydraulic retarder

Abstract

The utility model relates to a lubricating oil circulating system for a transition transmission case of an automobile hydraulic retarder, which belongs to the technical field of truck manufacturing and comprises a transmission auxiliary case, a transition transmission case front case body, a transition transmission case rear case body and a retarder. The front box body of the transition transmission box is connected to the rear end of the transmission auxiliary box; the front box body of the transition transmission box is connected with the rear box body of the transition transmission box; the retarder is mounted at the rear end of the rear box body of the transition transmission box; a circulating through hole for communicating the transition transmission box with the transmission auxiliary box is formed in the front box body of the transition transmission box, and an oil conveying hose is connected between the front box body of the transition transmission box and the transmission; lubricating oil can circulate among the transition transmission box, the transmission box and the transmission auxiliary box, heat balance of the lubricating oil is achieved, and the working temperature of the lubricating oil of a transmission mechanism of the transition transmission box is effectively reduced. The technical problem that the working temperature of lubricating oil is high due to the fact that the internal space of a transition transmission box is small and the torque needing to be transmitted is large is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of truck manufacturing, and in particular relates to a lubricating oil circulation system of a transition transmission box of a hydraulic retarder of an automobile. Background Art

[0002] The function of the automobile hydraulic retarder is to enable the retarder when the automobile is decelerating or going down a long slope, so that the vehicle can decelerate smoothly and avoid the wear and heat of the brake components caused by the use of brakes. The hydraulic retarder is a device that uses liquid damping to produce a retarding effect, thereby slowing down the vehicle. Installing a hydraulic retarder in the transmission system of a truck has become an urgent need for truck manufacturers and users. A transition transmission box is set at the rear end of the transmission. On the one hand, the speed of the retarder shaft can be increased by a gear transmission mechanism, and a larger braking torque can be obtained with a smaller turbine diameter, thereby reducing the total mass and volume of the retarder under the premise of the same braking torque. On the other hand, the center distance between the retarder shaft and the automobile transmission shaft can be increased, which provides convenience for the installation and arrangement of the retarder in the automobile. However, due to the small internal space of the transition transmission box and the large torque required to be transmitted, that is, the large heat load, how to reduce the working temperature of the lubricating oil of the transmission mechanism of the transition transmission box has become a problem to be solved urgently. Utility Model Content

[0003] In order to overcome the problems existing in the background technology, the utility model provides a lubricating oil circulation system for a transition transmission box of an automobile hydraulic retarder, which can realize the circulation of the lubricating oil between the transition transmission box, the transmission box and the transmission sub-box, achieve the heat balance of the lubricating oil, effectively reduce the lubricating oil working temperature of the transmission mechanism of the transition transmission box, and solve the technical problem of high lubricating oil working temperature caused by the small internal space of the transition transmission box and the large torque required to be transmitted.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] The automobile hydraulic retarder transition transmission box lubricating oil circulation system comprises a transmission sub-box, a transition transmission box front box body, a transition transmission box rear box body and a retarder;

[0006] The front case of the transition transmission box is connected to the rear end of the transmission sub-box; the front case of the transition transmission box is connected to the rear case of the transition transmission box, and a sealing gasket is installed on the connecting surface of the two; the retarder is installed at the rear end of the rear case of the transition transmission box;

[0007] A circulation through hole for connecting the transition transmission box with the transmission auxiliary box is arranged on the front box body of the transition transmission box; an oil delivery hose is connected between the front box body of the transition transmission box and the transmission.

[0008] Preferably, a driving gear and a driving shaft of the transition transmission box are provided in the transition transmission box; the driving gear and the driving shaft of the transition transmission box are connected by a spline transmission; a retarder gear and a retarder shaft are provided in the retarder; the retarder gear and the retarder shaft are connected by a spline transmission; the driving gear is meshed with the retarder gear.

[0009] Preferably, the circulation through hole is arranged on the left side of the middle part of the front housing of the transition transmission box and on the left side of the meshing position between the driving gear and the retarder gear.

[0010] Preferably, a tapered tube threaded hole is opened on the lower left side of the front housing of the transition transmission box, an oil pipe joint is installed on the front side of the tapered tube threaded hole, and the oil delivery hose is connected between the oil pipe joint and the transmission oil pipe joint.

[0011] Beneficial effects of the utility model:

[0012] The utility model connects the transmission sub-box and the transition transmission box by opening a circulation through hole on the front box body of the transition transmission box, so that lubricating oil can flow between the transition transmission box and the transmission sub-box; by opening the circulation through hole at the left side of the meshing position of the driving gear and the retarder gear, when the car is running, the gap between the teeth of the driving gear and the retarder gear changes from small to large, and a large vacuum degree is generated at the circulation through hole, so that the lubricating oil is sucked from the transmission sub-box into the transition transmission box, thereby reducing the oil temperature in the transition transmission box.

[0013] The utility model opens a tapered pipe threaded hole on the lower left side of the front case body of the transition transmission case, and arranges an oil delivery hose to connect the transition transmission case with the transmission, so as to realize the flow of lubricating oil between the transition transmission case and the transmission. The tapered pipe threaded hole is opened on the lower left side of the front case body of the transition transmission case, so that the lubricating oil contained between the gear teeth of the retarder flows from the transition transmission case through the oil pipe joint and the oil delivery hose into the transmission case body under the guiding effect of centrifugal force and a stopper arranged on the front case body of the transition transmission case at a certain pressure.

[0014] The overall structure of the utility model can realize the circulation of lubricating oil among the transition transmission box, the transmission box and the transmission sub-box, realize the heat balance of the lubricating oil, effectively reduce the working temperature of the lubricating oil in the transmission mechanism of the transition transmission box, and solve the technical problem of high working temperature of the lubricating oil caused by the small internal space of the transition transmission box and the large torque required to be transmitted. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a left view of the overall structural schematic diagram of the utility model;

[0016] Figure 2 It is the overall structural diagram of the utility model Figure 1 AA section view;

[0017] Figure 3 It is the overall structural diagram of the utility model Figure 2 BB partial cross-sectional view;

[0018] Remark: Figure 1 To project the view from left to right according to the direction of the car's travel;

[0019] Figures 1 to 3 The numbers in it are: 1-transmission sub-box, 2-transition transmission box front box body, 3-transition transmission box rear box body, 4-retarder, 5-sealing gasket, 6-oil pipe joint, 7-oil delivery hose, 8-driving gear, 9-transition transmission box driving shaft, 10-retarder gear, 11-retarder shaft, 12-block, 13-circulation through hole, 14-taper tube threaded hole opening position. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technicians.

[0021] In the description of the present invention, unless otherwise specified, the terms "left", "right", "up", "down", etc., indicating directions or state relationships, are based on the directions or state relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0023] like Figure 1-3 As shown, the automobile hydraulic retarder transition transmission box lubricating oil circulation system comprises a transmission sub-box 1, a transition transmission box and a retarder 4, and the transition transmission box comprises a transition transmission box front box body 2 and a transition transmission box rear box body 3.

[0024] The front housing 2 of the transition transmission case is connected to the rear end of the transmission sub-case 1; the front housing 2 of the transition transmission case is connected to the rear housing 3 of the transition transmission case, and a sealing gasket 5 is installed on the connection surface of the two; the retarder 4 is installed at the rear end of the rear housing 3 of the transition transmission case. A driving gear 8 and a driving shaft 9 of the transition transmission case are provided in the transition transmission case; the driving gear 8 and the driving shaft 9 of the transition transmission case are connected by spline transmission; a retarder gear 10 and a retarder shaft 11 are provided in the retarder 4; the retarder gear 10 and the retarder shaft 11 are connected by spline transmission; the driving gear 8 meshes with the retarder gear 10.

[0025] When the car is running normally, the power is transmitted from the gears in the transmission sub-box 1 to the transition transmission box driving shaft 9, and then drives the driving gear 8 to rotate through the spline. The driving gear 8 is meshed with the retarder gear 10, and drives the retarder shaft 11 to rotate through the spline. When retarder braking is required, the braking torque is transmitted from the retarder shaft 11 to the retarder gear 10 through the spline, and then to the driving gear 8. The driving gear 8 is transmitted to the transition transmission box driving shaft 9 through the spline, and then to the transmission output shaft through the gears in the transmission sub-box 1, and finally to the wheel brake through the transmission shaft.

[0026] A circulation through hole 13 is provided on the case body of the transition transmission case front case 2, so that the transition transmission case is connected with the transmission sub-case 1. The circulation through hole 13 is provided at the left side of the middle part of the transition transmission case front case 2, that is, at the left side of the meshing position of the driving gear 8 and the retarder gear 10. When the car is running, since the inter-tooth gap between the driving gear 8 and the retarder gear 10 at the circulation through hole 13 changes from small to large, a large vacuum is generated at the circulation through hole 13, and the lubricating oil is sucked from the transmission sub-case 1 into the transition transmission case.

[0027] A taper pipe threaded hole is provided at the lower left side of the front case 2 of the transition transmission box, and an oil pipe joint 6 is installed at the front side of the taper pipe threaded hole. The front case 2 of the transition transmission box is connected to the transmission by connecting the oil pipe joint 6 and the oil pipe joint of the transmission with an oil delivery hose 7. The lubricating oil contained between the teeth of the retarder gear 10 flows into the transmission case through the oil pipe joint 6 and the oil delivery hose 7 at a certain pressure under the guidance of the centrifugal force and the block 12 provided in the front case of the transition transmission box. Since there is a lubricating oil channel connected between the transmission sub-case 1 and the transmission case, as long as the car is running, the lubricating oil can flow from the transmission sub-case 1 to the transition transmission box, and flow to the transmission case through the oil delivery hose 6, and then flow from the transmission case to the transmission sub-case 1, forming a circulation loop, realizing the heat balance of the lubricating oil, effectively reducing the working temperature of the lubricating oil of the transmission mechanism of the transition transmission box, and solving the technical problem of high working temperature of the lubricating oil caused by the small internal space and large torque required to be transmitted in the transition transmission box.

[0028] The working principle of this utility model:

[0029] Under the retarder braking condition, the driving gear 8 and the retarder gear 10 in the transition transmission case are subjected to a large torque, that is, a large thermal load; while the gears of the shift transmission mechanism in front of the transmission are subjected to a small torque, that is, a small thermal load. The lubricating oil with a higher temperature in the transition transmission case flows into the transmission case with a lower temperature, while the lubricating oil with a lower temperature flows from the transmission case to the transmission sub-case 1, and finally flows into the transition transmission case.

[0030] When the retarder is not braking, the torque borne by the driving gear 8 and the retarder gear 10 in the transition transmission case is small, that is, the heat load is small; while the torque borne by the gear of the shift transmission mechanism in front of the transmission is large, that is, the heat load is large. The lubricating oil with lower temperature in the transition transmission case flows into the transmission case with higher temperature, while the lubricating oil with higher temperature flows from the transmission case to the transmission sub-case 1, and finally flows to the transition transmission case for cooling.

[0031] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. A lubricating oil circulation system for a transitional transmission box of an automobile hydraulic retarder, characterized in that: It comprises a transmission sub-box (1), a transition transmission box front box body (2), a transition transmission box rear box body (3) and a retarder (4); The front case (2) of the transition transmission box is connected to the rear end of the transmission sub-case (1); the front case (2) of the transition transmission box is connected to the rear case (3) of the transition transmission box, and a sealing gasket (5) is installed on the connecting surface of the two; the retarder (4) is installed at the rear end of the rear case (3) of the transition transmission box; A circulation through hole (13) is provided on the front housing (2) of the transition transmission box to connect the transition transmission box with the transmission sub-box (1); An oil delivery hose (7) is connected between the front case (2) of the transition transmission box and the transmission.

2. The automobile hydraulic retarder transition transmission box lubricating oil circulation system according to claim 1 is characterized in that: A driving gear (8) and a driving shaft (9) of the transition transmission box are provided in the transition transmission box; the driving gear (8) and the driving shaft (9) of the transition transmission box are connected via a spline transmission; a retarder gear (10) and a retarder shaft (11) are provided in the retarder (4); the retarder gear (10) and the retarder shaft (11) are connected via a spline transmission; the driving gear (8) and the retarder gear (10) are meshed.

3. The automobile hydraulic retarder transition transmission box lubricating oil circulation system according to claim 2 is characterized in that: The circulation through hole (13) is provided at a position close to the left side of the middle part of the front housing (2) of the transition transmission box and at a position on the left side of the meshing position of the driving gear (8) and the retarder gear (10).

4. The automobile hydraulic retarder transition transmission box lubricating oil circulation system according to claim 1 is characterized in that: A tapered pipe threaded hole is provided on the lower left side of the front housing (2) of the transition transmission box, an oil pipe joint (6) is installed in front of the tapered pipe threaded hole, and an oil delivery hose (7) is connected between the oil pipe joint (6) and the transmission oil pipe joint.

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