JPS61268816A - Positioning structure of thermostat - Google Patents

Abstract

PURPOSE:To simply and reliably contain a thermostat in a case body, by a method wherein a projection or a recessed part is formed in the inner peripheral surface of the body of a thermostat case or a cap, and the element holder of the thermostat is locked to the projection or the recessed part. CONSTITUTION:Projections 15 are formed about vertically on both sides of a mounting port 8 of a temperature detector located on the inner peripheral surface of a case body 1 of a thermostat 3. A broad middle high part side edge 12a of an U-shaped element holder 12 holding an element 10 and a spring 11 of the thermostat 3 is positioned along the projections 15. This, when the thermostat 3 is engaged internally of the thermostat body 1, causes the middle high part side edge 12a to engage with the projection 15 so as to be locked thereto. This enables the themostat 3 to be positioned in a correct place allowing the element holder 12 to be prevented from supoerposition with an incoming port 4 and an outgoing port 5 for cooling water. This enables the thermostat 3 to be contained in the case body.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a positioning structure for a thermostat in a cooling device for a water-cooled engine such as a two-axle automatic vehicle.

[Prior art]

Cooling systems for water-cooled engines such as motorcycles circulate cooling water between the radiator and the water jackets of the cylinder and cylinder head. When the water pump sends cooling water to the water jacket, heat is released. It then enters the radiator, where it returns to the water pump, releasing heat into the air. When the engine is cold, the temperature of the coolant does not rise, so the thermostat element in the thermostat body connected to the water jacket outlet vibrator does not respond, the thermostat remains closed, and the coolant flows out. Not sent to the radiator. When the engine gets hot and the coolant temperature rises to a predetermined temperature, the thermostat element responds and moves down against the spring.
The thermostat opens and warmed cooling water is sent to the radiator.

Thermostats are generally housed in relatively large cases in order to ensure the flow of cooling water, but in recent years, in motorcycles, etc., thermostats have been housed in relatively large cases to reduce the weight of the vehicle body and to ensure flexibility in the layout of engine peripheral equipment. In order to do this, the thermostat case has been made smaller.

FIG. 5 shows a miniaturized thermostat case and a thermostat accommodated therein. In the figure, 1 is the main body of the thermostat case, 2 is the cap of the thermostat case,
3 is a thermostat fitted into the main body 1. The main body 1 of the thermostat case is provided with a cooling water inlet 4 connected to an outlet vibrator of a water jacket (not shown), and the cap 2 is provided with a cooling water outlet 5 connected to a cooling water pipe connected to a radiator (not shown). is provided. The thermostat 3 is fitted into the main body 1, and the flange-type gasket 3a at the middle and high part is fitted into the step 1a on the inner upper edge of the main body 1, and the cap 2 is fastened to the main body 1. The screws 6.6' and bolt insertion holes 7.7' provided in the cap 2 are aligned, and the bolt (not shown) passes through the bolt insertion holes 7, 7' and the screws 6, 6'.
is screwed into. Note that 8 is a mounting port for a cooling water temperature detector provided in the main body 1, and 9.9' is a bolt screwing part for supporting the main body 1 on a bracket (not shown).

[Problems to be Solved by the Invention] By the way, when fitting the thermostat 3 into the main body 1 of the thermostat case that has been miniaturized as described above, it is necessary to orient the thermostat 3 in the correct direction, that is, the element 10,
If the U-shaped element holder 12 holding the spring 11 is not inserted perpendicularly to the cooling water inlet 4, the element holder 12 will narrow the opening of the cooling water inlet 4 and the cooling efficiency of the engine will decrease. Therefore, the present invention provides a thermostat positioning structure that allows the thermostat to be easily and correctly housed in the thermostat case.

[Means for solving problems]

The thermostat positioning structure of the present invention for solving the above problems includes providing a convex portion or a concave portion on the inner peripheral surface of the main body or the cap of the thermostat case, and locking the element holder of the thermostat in the convex portion or the concave portion. This allows the element holder to connect to the cooling water inlet of the thermostat case.

It is characterized in that it does not overlap with the outlet.

[For production]

Since the configuration is as described above, when assembling the thermostat, when fitting the thermostat into the main body of the thermostat case, the element holder can be inserted into the convex part or the concave part on the inner circumferential surface of the main body. Alternatively, the element holder can be connected to the cooling water inlet and outlet of the thermostat case by locking the protrusion or recess on the inner circumferential surface of the cap of the thermostat in the main body with the element holder and orienting the cap in a predetermined direction. They are positioned in the correct position without overlapping.

〔Example〕

An embodiment of the thermostat positioning structure of the present invention will be described with reference to FIG. Since the same reference numerals in the figure as in FIG. 5 indicate the same members, the explanation thereof will be omitted. A U-shaped protrusion 15 is provided almost perpendicularly on both sides of the mounting port 8 of the temperature sensor on the inner peripheral surface of the main body 1 of the thermostat case, and the element 10 and spring 11 of the thermostat 3 are held in this protrusion 15. The wide side edge 12a of the middle and high part of the element holder 12 is arranged along the side edge 12a of the element holder 12.

According to the thermostat positioning structure configured in this way, when the thermostat 3 is fitted into the main body 1 of the thermostat case, the wide middle and high side edge 12a of the element holder 12 is placed on the convex part 15 on the inner circumferential surface of the main body 1. By fitting the element holder 12 so that it can be locked, the element holder 12 is placed in the correct position where it does not overlap with the cooling water inlet 4 and the outlet 5.
Thermostat 3 is positioned. When the cap 2 is fastened to the main body 1 in this state, the flange-type gasket 3a of the thermostat 3 fitted to the step 1a on the inner upper edge of the main body 1 is tightened, and the cap 2 and the main body 1 are sealed. Ru.

FIG. 2 shows a wide structure in which two substantially perpendicular protrusions 15 provided on the inner circumferential surface of the main body 1 of the thermostat case shown in FIG. Convex part 1
6, by fitting the thermostat 3 into the main body 1 in the same manner as on the actual flow side, the thermostat 3 is placed in the correct position where the element holder 12 does not overlap with the cooling water inlet 4 and outlet 5. Positioned.

In the embodiment shown in FIG. 3, a convex portion 17 is provided on both sides of the cooling water outlet 5 on the inner circumferential surface of the cap 2 of the thermostat case, and the convex portion 17 is attached to the upper side edge 12b of the element holder 12 of the thermostat 3. It was designed so that the

According to the thermostat positioning structure configured in this way, the main body 1 of the thermostat case (see Figure 5)
After fitting the thermostat 3 inside, the convex part 17 on the inner circumferential surface of the cap 2 is engaged with the element holder 12 and the cap 2 is turned in a predetermined direction, so that the element holder 12 connects to the cooling water inlet 4 and the outlet. The thermostat 3 is positioned at a correct position that does not overlap with the thermostat 5. When the cap 2 is fastened to the main body 1 (see FIG. 5) in this state, the flange type gasket 3a of the thermostat 3 is tightened, and the cap 2 and the main body 1 are sealed.

In the embodiment shown in FIG. 4, a recess 18 is provided almost vertically on the inner circumferential surface of the thermostat main body 1 at a position opposite to the cooling water inlet 4 and does not overlap with the cooling water inlet 4.
A convex portion 19 is provided in the middle portion of the element holder 12.

According to the thermostat positioning structure configured in this way, when the thermostat 3 is fitted into the main body 1 of the thermostat case, the convex portion 19 of the element holder 12
is inserted into the recess 18 on the inner circumferential surface of the main body 1, and the thermostat 3 is inserted into the main body 1 using this as a guide, so that the thermostat 3 is placed in the correct position where the element holder 12 does not overlap the cooling water inlet 4. Positioned. When the cap 2 is fastened to the main body 1 in this state, the flange type gasket 3a of the thermostat 3 is tightened, and the cap 2 and the main body 1 are sealed.

〔Effect of the invention〕

As detailed above, according to the thermostat positioning structure of the present invention, when the thermostat is inserted into the main body of the thermostat case, the element holder is inserted so that it can be locked in the protrusion or recess on the inner peripheral surface of the main body. According to
Alternatively, by inserting the thermostat into the main body and engaging the protrusion or recess on the inner circumferential surface of the machine cap with the element holder and orienting the cap in a predetermined direction, the element holder can be aligned with the cooling water inlet and outlet of the thermostat case. must be positioned in the correct position. Therefore, the element holder of the thermostat does not restrict the opening of the cooling water inlet, and even if the thermostat is opened due to a rise in the temperature of the cooling water during use, the flow rate of the cooling water will not decrease and will remain constant. This has the effect that the cooling efficiency of the engine does not decrease.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the thermostat positioning structure of the present invention, and is a perspective view of the main body of the thermostat case, the cap, and the thermostat, and Fig. 2 is a perspective view showing an example of a modification of the main body of the thermostat case in Fig. 1. 3 shows another embodiment, and FIG. 4 shows a perspective view of the cap of the thermostat case and the thermostat, and FIG. FIG. 5 is a perspective view of the main body, cap, and thermostat of a conventional thermostat case. 1...Main body of thermostat case 2...Cap of thermostat case 3...Thermostat 4...Cooling water inlet 5...Cooling water outlet 12...Element holder 12a...Middle and high side Edge 12b... Upper side edge 15, 16, 17, 19... Protrusion 18 Recess Applicant Kawasaki Heavy Industries, Ltd. Figure 2 Figure 3

Claims (1)

[Claims] By providing a protrusion or a recess on the inner peripheral surface of the main body or cap of the thermostat case, and locking the element holder of the thermostat to the protrusion or recess, the element holder can be used as the cooling water inlet or outlet of the thermostat case. A thermostat positioning structure characterized by preventing overlapping.