JP2014149017A - Transmission unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission unit which can surely prevent the deterioration of the quality of oil passages in vicinities of an inlet and an outlet of an oil warmer by improving the sealing performance of the oil passages in the vicinities of the inlet and the outlet of the oil warmer while reducing the number of pipe items more than before.SOLUTION: A transmission unit 100 is mounted with an oil warmer 10 which can raise a temperature of oil supplied to a transmission 30 by heat-exchange between the oil and engine cooling water flowing out of an engine 1, and comprises first and second housings which can form an accommodation space of a gear change mechanism of the transmission 30 in a state that joining faces are joined to each other. The oil warmer 10 is arranged in the vicinity of the joining faces in a plan view, and a portion of oil passages 54 in the vicinity of the inlet or the vicinity of the outlet of the oil warmer 10 is formed by using recessed grooves which are formed at the joining faces.

Description

  The present invention relates to a transmission unit equipped with an oil warmer capable of raising the temperature of oil supplied to a transmission mechanism such as a CVT (Continuously Variable Transmission).

  2. Description of the Related Art Conventionally, there is known a transmission unit equipped with an oil warmer capable of raising the temperature of oil supplied to a speed change mechanism such as an automatic transmission (CVT) (see, for example, Patent Document 1). Here, the temperature of the oil is increased by heat exchange with the engine coolant that has flowed out of the engine. A speed change mechanism such as a torque converter is housed inside the housing.

Japanese Patent Application No. 2012-260679

  The oil warmer is connected to piping such as a water hose serving as an engine cooling water path and an oil hose serving as an oil path. Above all, the oil hose is expensive, and there are concerns about quality problems such as deterioration, so that strict quality maintenance is required as compared with the water hose. In particular, stricter quality maintenance is required for oil hoses near the inlet and the outlet of the oil warmer. Therefore, it is preferable that the oil hose in the vicinity of the inlet and the outlet of the oil warmer be sealed inside the housing in order to prevent the damage and prevent deterioration of the quality.

  Therefore, the present invention reduces the number of piping than before and improves the sealing performance of the oil path near the inlet and the outlet of the oil warmer than before, so that the oil path near the inlet and the outlet of the oil warmer is improved. The purpose is to provide a transmission unit that can reliably prevent quality degradation.

  The transmission unit of the present invention provided to solve the above-described problem includes a transmission equipped with an oil warmer capable of raising the temperature of oil supplied to the transmission by heat exchange with engine coolant flowing out of the engine. A unit comprising a first housing and a second housing capable of forming an accommodation space for the transmission mechanism of the transmission in a state in which the joint surfaces are aligned with each other; In the oil path, a portion in the vicinity of the inlet or the outlet of the oil warmer is configured using a concave groove formed in the joint surface. is there.

  In the transmission unit of the present invention, the oil warmer is disposed in the vicinity of the joint surface between the first housing and the second housing in a plan view, and the portion of the oil path near the inlet or the outlet of the oil warmer is The concave groove formed in the joint surface of the first housing and the second housing is used. As a result, with the joint surfaces of the first housing and the second housing aligned with each other, a portion of the oil path near the inlet or the outlet of the oil warmer is pushed into the first housing and the second housing. Can be sealed with. Therefore, the sealing performance of the oil path in the vicinity of the inlet or the outlet of the oil warmer can be improved as compared with the conventional case. As a result, it is possible to reliably prevent deterioration of the quality of the oil path in the vicinity of the inlet or the outlet of the oil warmer.

  In the transmission unit of the present invention, a part of the oil path can be constituted by the concave groove formed in the joining surface of the first housing and the second housing, so that the number of piping can be reduced as compared with the conventional case.

In the transmission unit of the present invention, in order to form a part of the oil path by utilizing the groove formed on the joint surface, an opening ( oil path without a lid) formed on one joint surface is formed on the other joint surface. However, it is necessary to cover the member with the first housing or the second housing.

  According to the present invention, the oil passage near the inlet and the outlet of the oil warmer is improved by improving the sealing performance of the oil path near the inlet and the outlet of the oil warmer while reducing the number of pipes than before. It is possible to reliably prevent quality degradation of the route.

It is a piping system diagram showing the flow of a heat medium at the time of warming of a transmission unit concerning one embodiment of the present invention. It is a perspective view of the transmission unit shown in FIG. It is a top view of the transmission unit shown in FIG. It is a front view of the joint surface by the side of the 1st housing.

  Hereinafter, a transmission unit 100 according to an embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, the oil warmer 10 mainly increases the temperature of oil such as CVT oil supplied to the transmission 30 by heat exchange with the engine coolant that has flowed out of the engine 1 to improve the warm-up property. It is provided as a purpose. As shown in FIG. 3, the oil warmer 10 is disposed in the vicinity of the joint surface (the bold line portion in the drawing) of the first housing 32 and the second housing 34 in plan view. The oil warmer 10 can also act as a cooler for cooling the oil under conditions where the temperature of the engine cooling water is lower than that of the oil.

  A thermo valve 20 shown in FIG. 1 automatically operates according to the temperature of engine coolant, and has a built-in thermostat (not shown). The thermostat is configured to be movable according to the temperature of the engine cooling water. And by this movement of the thermostat, the flow path system of the engine cooling water flows from the engine 1 to the air conditioning heater 40 in the vehicle (corresponding to the external pipe 56a in FIG. 1), and from the engine 1 to the oil warmer 10 And a flow path (corresponding to the external pipe 58a in FIG. 1).

  A transmission 30 shown in FIG. 1 is a transmission such as a continuous automatic transmission (CVT) and has a structure in which a transmission mechanism such as a torque converter and a valve body (hydraulic device) is accommodated. This transmission mechanism is accommodated in an accommodation space formed in a state where the joint surfaces of the first housing 32 and the second housing 34 shown in FIG.

  As shown in FIG. 1, the thermo valve 20 is connected to the engine 1, the oil warmer 10, and the transmission 30 by a piping system 50. Specifically, the piping system 50 includes a heat medium circulation system 52 and an oil circulation system 54.

  As shown in FIG. 1, the heat medium circulation system 52 includes a main pipe 56 and a sub pipe 58. The main pipe 56 is a pipe for circulating engine cooling water between the air conditioning heater 40 and the engine 1. The main pipe 56 has an external pipe 56 a that connects the thermo valve 20 and the air conditioning heater 40 in the middle of the main pipe 56. The external piping 56a is provided outside the first housing 32 and the second housing 34, as shown in FIGS.

  As shown in FIG. 1, the sub pipe 58 is branched by the thermo valve 20 and is a pipe for circulating engine cooling water between the oil warmer 10 and the engine 1. The sub pipe 58 has an external pipe 58 a that connects the thermo valve 20 and the oil warmer 10, and an external pipe 58 b that connects the oil warmer 10 and the three-way valve 60. As shown in FIGS. 2 and 3, the external pipes 58 a and 58 b are provided outside the first housing 32 and the second housing 34. In FIG. 1, piping for circulating engine cooling water between the engine 1 and a radiator (not shown) in the heat medium circulation system 52 is not shown.

  As shown in FIG. 1, the oil circulation system 54 is a circulation system for circulating oil between the oil warmer 10 and the transmission 30. The oil circulation system 54 includes an external pipe 54a, an inlet pipe 54b, and an outlet pipe 54c. The external pipe 54a is a pipe that connects the valve body and one end of the inlet pipe 54b. The external pipe 54 a is configured using a heat insulating material or the like, and is provided outside the first housing 32 and the second housing 34 as shown in FIGS. 2 and 3.

  The inlet pipe 54 b is a pipe near the inlet of the oil warmer 10. The other end of the inlet pipe 54 b is connected to the inlet of the oil warmer 10. The outlet pipe 54c is a pipe near the outlet of the oil warmer 10, and connects the outlet of the oil warmer 10 and an injection cylinder (not shown). This injection cylinder is a cylindrical member capable of injecting oil heated to an appropriate temperature by the oil warmer 10 onto a transmission belt such as a CVT belt.

As shown in FIG. 4, the inlet pipe 54 b and the outlet pipe 54 c are configured using a concave groove formed on the joint surface on the first housing 32 side, and are formed on the joint surface on the first housing 32 side. It is configured by covering the formed opening ( oil path without a lid) with the second housing 34.

  Next, the operation of the transmission unit 100 will be described with reference to FIG. 1 showing the flow of the heat medium of the transmission unit 100 according to the present embodiment. Here, the flow of the heat medium during warm-up will be described. In addition, each arrow A and B in FIG. 1 has shown the flow of engine cooling water and oil.

  A part of the engine cooling water flowing out from the engine 1 is diverted by the thermo valve 20 and flows into the air conditioning heater 40. In the air conditioning heater 40, heat exchange is performed between the engine cooling water and the vehicle interior air, and the heat of the engine cooling water is radiated to the vehicle interior air. After this heat dissipation, part of the engine cooling water flows into the engine 1 again via the three-way valve 60.

  On the other hand, the remaining engine coolant diverted by the thermo valve 20 flows into the oil warmer 10. In the oil warmer 10, heat exchange is performed between engine cooling water and oil. By this heat exchange, CVT oil or the like is warmed to an appropriate temperature, and the viscosity of the oil is lowered. Then, the remaining engine cooling water flows into the engine 1 again via the three-way valve 60.

  As described above, in the transmission unit 100 of the present embodiment, the oil warmer 10 is disposed in the vicinity of the joining surface of the first housing 32 and the second housing 34 in plan view, and the oil circulation system 54 includes: An inlet pipe 54b in the vicinity of the inlet of the oil warmer 10 and an outlet pipe 54c in the vicinity of the outlet of the oil warmer 10 are configured using concave grooves formed in the joint surfaces of the first housing 32 and the second housing 34. Thus, the inlet pipe 54b and the outlet pipe 54c of the oil circulation system 54 are connected to the inside of the first housing 32 and the second housing 34 in a state where the joint surfaces of the first housing 32 and the second housing 34 are aligned with each other. Can be pushed into the seal. Therefore, the sealing performance of the inlet pipe 54b and the outlet pipe 54c can be improved as compared with the conventional art. As a result, quality deterioration of the inlet pipe 54b and the outlet pipe 54c can be reliably prevented.

  Further, in the transmission unit 100 of the present embodiment, a part of the oil circulation system 54 can be configured by the concave groove formed in the joining surface of the first housing 32 and the second housing 34, so the number of piping is reduced as compared with the conventional case. be able to.

  Further, in the transmission unit 100 of the present embodiment, in order to form a part of the oil circulation system 54 using the groove formed on the joint surface, the opening formed on the joint surface of the first housing 32 is covered. Although necessary, the member serving as the lid can be easily configured by the second housing 34.

  As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  In the above embodiment, the inlet pipe 54b and the outlet pipe 54c are configured by forming a concave groove on the joint surface on the first housing 32 side, but the present invention is not limited to this, and the second housing 34 side The inlet pipe 54b and the outlet pipe 54c may be formed by forming a concave groove on the joint surface, or a concave groove may be formed in both the first housing 32 and the second housing 34.

  The present invention can be suitably used in a transmission unit equipped with an oil warmer capable of raising the temperature of oil supplied to a transmission mechanism such as CVT.

1 Engine 10 Oil Warmer 30 Transmission 32 First Housing 34 Second Housing 54 Oil Circulation System (Oil Path)
54a Inlet piping (part near the oil warmer inlet)
54b Outlet piping (portion in the vicinity of the oil warmer outlet)
100 transmission unit

Claims (1)

A transmission unit equipped with an oil warmer capable of raising the temperature of oil supplied to the transmission by heat exchange with engine coolant that has flown out of the engine,
A first housing and a second housing capable of forming an accommodation space of the transmission speed change mechanism in a state where the respective joint surfaces are aligned with each other;
The oil warmer is
Arranged in the vicinity of the joint surface in plan view;
Of the oil path, the vicinity of the inlet or the outlet of the oil warmer is
A transmission unit comprising a concave groove formed in the joint surface.