CN109973171B

CN109973171B - Interior oil pan with bimetallic strip control by temperature change structure

Info

Publication number: CN109973171B
Application number: CN201910243672.8A
Authority: CN
Inventors: 饶鹏; 靳晓妍; 王静秋; 徐天添; 唐元媛
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2020-04-07
Anticipated expiration: 2039-03-28
Also published as: CN109973171A

Abstract

The invention discloses an inner oil drain pan with a bimetallic strip temperature control structure, which is characterized by comprising a shell and a bimetallic strip assembly, wherein an oil drainage hole is formed in the shell, and the bimetallic strip assembly closes the oil drainage hole at normal temperature and bends and deforms to open the oil drainage hole when being heated. The oil drain hole is opened by the bimetallic strip when the temperature of the engine oil rises to the preset temperature, the engine oil of the inner oil pan and the oil of the outer oil pan are communicated, all the engine oil participates in circulation, the normal running of an engine is ensured, and the excessive engine oil cracking is prevented.

Description

Interior oil pan with bimetallic strip control by temperature change structure

Technical Field

The invention relates to the technical field of automobile engines, in particular to an inner oil pan with a bimetallic strip temperature control structure.

Background

With stricter regulations on oil consumption and emission, various automobile enterprises adopt new technologies on engines to meet the requirements of the regulations, such as an EGR technology, an Atkinson-Miller cycle or a full MAP control PCJ technology and the like in the aspect of economy. It is known that when an automobile is started in a cold state, the engine economy is poor due to high viscosity of engine oil and high frictional resistance between moving parts of the engine, and the fuel consumption is improved after the temperature of standby oil is increased to about 80 ℃ after the automobile runs for a period of time.

The chinese patent application publication No. CN 109139179a discloses a variable oil sump, in which, when an automobile is cold-started, a lubrication system basically only uses the engine oil in the inner sump, so as to achieve an effect similar to rapid warming-up, and when the temperature of the engine oil rises to a certain value, all the engine oil in the inner and outer sumps participate in the lubrication cycle again. Be equipped with the temperature-saving valve on the inner oil pan bottom lateral wall in this patent, the temperature-saving valve is opened when the engine oil reaches the set temperature, and the engine oil flows into outer oil pan. However, the existing thermostatic valve is opened by paraffin volume expansion, and has the following disadvantages: the structure is complex and easy to damage, and the cost is high; the paraffin is arranged in the shell, and a certain time is needed for the heat of the engine oil to be conducted into the paraffin, so that the reaction to the temperature change of the engine oil is not timely enough, and the starting is delayed.

The bimetallic strip is also called as a thermal bimetallic strip, and because the thermal expansion coefficients of all component layers are different, when the temperature changes, the deformation of the active layer is larger than that of the passive layer, so that the whole bimetallic strip can bend towards one side of the passive layer, and the curvature of the composite material changes to generate deformation. Wherein, the active layer with higher expansion coefficient is called as the active layer; the lower expansion coefficient is called the passive layer. The bimetallic strip is widely used in relays, switches, controllers and the like, but the bimetallic strip in the prior art can only be arranged in a valve body and installed in a medium pipeline, has a complex structure and cannot be directly applied to an open inner oil bottom shell.

Therefore, it is required to develop an inner oil pan with a bimetal temperature control structure, which has a simple structure and is fast in response.

Disclosure of Invention

The invention aims to solve the defects of the background technology and provide an inner oil sump shell with a bimetallic strip temperature control structure, which has a simple structure and is quick in response.

The technical scheme of the invention is as follows: an inner oil sump shell with a bimetallic strip temperature control structure is characterized by comprising a shell and a bimetallic strip assembly,

the oil drainage hole is formed in the shell, the bimetallic strip assembly closes the oil drainage hole at normal temperature and is bent and deformed to open the oil drainage hole when being heated.

Preferably, the bimetallic strip assembly comprises a clamping jaw and a bimetallic strip which is bent and deformed along the length direction when heated, and the clamping jaw fixes the bimetallic strip on the shell.

Furthermore, the casing is provided with an inwards concave mounting groove, the oil drainage hole is formed in the groove bottom of the mounting groove, and a clamping structure matched with the clamping jaw is arranged in the mounting groove to fix the head end of the bimetallic strip.

Furthermore, the joint structure is the Y type support that evenly extends along bimetallic strip width direction, Y type support includes that the mounting groove tank bottom extends and forms the base plate to and the fork board that the base plate set up on one side of closing on the casing, the fork board both ends are equipped with the connection piece and are connected with the casing.

Furthermore, the claw comprises a claw body and a clamping hook formed by bending one end of the claw body corresponding to the head end of the bimetallic strip, the claw body extends towards the tail end of the bimetallic strip and gradually keeps away from the oil drainage hole, and a first clamping tooth is arranged at the end part of the clamping hook.

Furthermore, the head end of the bimetallic strip is bent to be attached to the end face of the substrate, the clamping hook compresses the head end of the bimetallic strip, the first clamping tooth and the fork plate are clamped on one side of the shell, and the two sides of the clamping hook are matched with the connecting piece for limitation.

Furthermore, the groove wall of the mounting groove protrudes outwards relatively to form a mounting groove, the claw body is mounted in the mounting groove, and the bottom of the claw body is connected with the mounting groove in a clamping mode.

Furthermore, the claw body is provided with a leakage hole corresponding to the oil drainage hole, and first flanges matched with the side walls of the mounting groove are arranged on two sides of the claw body in the width direction of the bimetallic strip.

Furthermore, a second flanging is arranged at the bottom of the claw body, a limiting rod is arranged in the mounting groove, and a second clamping tooth is arranged on the second flanging and is in matched clamping connection with the limiting rod.

Furthermore, the oil drainage hole is a curved surface hole which is bent towards the inside of the shell, the bimetallic strip is an arc-shaped strip which is attached to the oil drainage hole at normal temperature, and the tail end of the bimetallic strip is bent towards the clamping jaw to be attached to the clamping jaw when the bimetallic strip is heated.

Preferably, the thermal expansion coefficient of the metal element layer close to the oil drainage hole in the bimetallic strip is larger than that of the metal element layer far away from the oil drainage hole.

In the above scheme, the head end and the tail end of the bimetallic strip refer to two ends in the length direction, and any one end is the head end while the other end is the tail end.

The invention has the beneficial effects that:

1. the bimetallic strip is direct to contact with engine oil, closes in the laminating draining hole under the normal atmospheric temperature, and when the engine oil heaies up to preset temperature the bimetallic strip can the temperature sensing rapidly, and self bending deformation is in time opened the draining hole.

2. The bimetallic strip is installed only through the mounting groove and the clamping jaw on the shell, other installation parts are not needed, the clamping jaw not only fixes the head end of the bimetallic strip in a clamped mode, but also extends towards the tail end to be away from the oil drainage hole, a space for bending and moving the tail end of the bimetallic strip is formed between the clamping jaw and the mounting groove, and the bending deformation state of the bimetallic strip is limited.

3. The oil drain hole is opened by the bimetallic strip when the temperature of the engine oil rises to the preset temperature, the engine oil of the inner oil pan and the oil of the outer oil pan are communicated, all the engine oil participates in circulation, the normal running of the engine is ensured, and the over-fast engine oil cracking is prevented.

Drawings

FIG. 1 is a schematic view of the inner sump according to the present invention

FIG. 2 is a view of the part A in FIG. 1

FIG. 3 is a schematic view of the mounting groove structure (top view)

FIG. 4 is a schematic view (top view) of the connection structure of the bimetal strip and the mounting groove

FIG. 5 is a schematic view showing a connection structure of the bimetal strip and the mounting groove (outer side view)

FIG. 6 is a schematic view of the structure of the clamping jaws

FIG. 7 is a schematic view showing a connection structure of the locking claw and the mounting groove (omitting the bimetal)

FIG. 8 is a sectional view showing the connection of the mounting groove, the locking claw and the bimetallic strip (with the oil release hole closed)

FIG. 9 is a sectional view showing the connection of the mounting groove, the latch and the bimetal (the oil release hole is opened)

Wherein: 1-shell 2-bimetallic strip 3-mounting groove 4-oil drain hole 5-claw 6-claw body 7-hook 8-Y type support 9-mounting groove 10-limiting rod 6.1-first flanging 6.2-second flanging 6.3-second latch 6.4-leakage hole 7.1-first latch 7.2-observation hole.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

As shown in fig. 1-7, the inner oil pan with a bimetallic strip temperature control structure provided by the invention comprises a shell 1 and a bimetallic strip assembly, wherein the bimetallic strip assembly comprises a claw 5 and a bimetallic strip 2 which is subjected to bending deformation along the length direction when being heated, the shell 1 is inwards recessed from the side surface to form a mounting groove 3, the groove walls of the two sides limit the bimetallic strip 2 in the width direction, an oil drainage hole 4 is formed at the bottom of the mounting groove 3, and the bimetallic strip 2 is attached to the bottom of the groove at normal temperature to close the oil drainage hole 4; still be equipped with the jack catch 5 fixed with bimetallic strip 2 top in the mounting groove 3, jack catch 5 extends and keeps away from draining hole 4 gradually towards 2 tail ends of bimetallic strip, and tail end is opened draining hole 4 towards 5 crooked deformations of jack catch when bimetallic strip 2 meets heat.

In this embodiment, draining hole 4 is the curved surface hole of downward inside bending towards the oil pan, and bimetallic strip 2 is the arc piece of tail orientation draining hole 4 bending laminating under the normal atmospheric temperature, and bimetallic strip 2's head end and tail end are length direction's last lower extreme promptly.

The jack catch 5 includes downwards towards keeping away from 4 directions of draining hole (outwards)

crooked claw body

6 and 6 tops of claw body towards the direction of draining hole 4 (inwards) pothook 7 of bending type, and mounting groove 3 is equipped with the joint structure in draining hole 4 top department, and pothook 7 is fixed in the joint structurally with 2 head ends of bimetallic strip.

The clamping structure is a Y-shaped support 8 which extends along the width direction of the bimetallic strip 2 and has an upward opening, the head end of the bimetallic strip 2 is tightly attached to the outer side of the Y-shaped support 8 and is bent into the opening, and the clamping hook 7 compresses the head end of the bimetallic strip 2 and bypasses the opening of the Y-shaped support 8 to be clamped with the inner side of the Y-shaped support.

In this embodiment, Y type support 8 includes that the 3 tank bottoms of mounting groove extend upwards in draining hole 4 top and form the base plate 8.1 that surpasss the casing 1 side, and base plate 8.1 upper end inboard (the one side that closes on casing 1) sets up fork 8.2, and base plate 8.1 forms Y type structure with fork 8.2 jointly, and fork 8.2 is equipped with connection piece 8.3 and is connected with the 3 lateral walls of mounting groove along 2 width direction's of bimetallic strip both ends. The head end of the bimetallic strip 2 is tightly attached to the outer side (the side far away from the shell 1) of the substrate 8.1 and is bent to the upper end face of the substrate 8.1, and the clamping hook 7 is used for pressing the head end of the bimetallic strip 2.

The hook 7 is provided with an observation hole 7.2, the edge of the observation hole 7.2 close to the end part of the hook 7 is provided with a first latch 7.1 with an outward clamping surface, and the first latch 7.1 is matched and clamped with the inner side of the Y-shaped bracket 8. In this embodiment, the observation hole 7.2 of the hook 7 exposes the upper end surfaces of the base plate 8.1 and the fork plate 8.2 on the Y-shaped support 8, the first latch 7.1 is clamped with the inner side of the fork plate 8.2, and the connecting piece 8.3 limits the hook 7 along the two ends of the bimetallic strip 2 in the width direction.

The claw body 6 is the parallel platelike structure of width direction and bimetallic strip 2 width direction, and the both sides cell wall of mounting groove 3 forms mounting groove 9 from draining 4 tops relative outer dents, and the claw body 6 is installed in mounting groove 9 and bottom and mounting groove 9 joint. The claw body 6 is provided with a leakage hole 6.4 corresponding to the oil drainage hole 4, and the claw body 6 is provided with first turned-over edges 6.1 on two sides in the width direction to be matched with two side walls of the mounting groove 9. The claw body 6 is provided with a second flanging 6.2 at the bottom, a limiting rod 10 is arranged in the mounting groove 9, a second latch 6.3 with an outward clamping surface is arranged on the second flanging 6.2, the second flanging 6.2 is matched with the upper end surface of the limiting rod 10, and the second latch 6.3 is matched and clamped with the inner side surface of the limiting rod 10.

When meeting heat, bimetallic strip 2 tail end is towards jack catch 5 bending deformation to laminating with jack catch 5, and bimetallic strip 2 meets heat deformation temperature for 80 ℃ in this embodiment. The bimetallic strip 2 comprises two metal element layers with different expansion coefficients, wherein the thermal expansion coefficient of the metal element layer on one side close to the oil drain hole 4 is larger than that of the metal element layer on one side far away from the oil drain hole 4.

The working principle of the embodiment is as follows:

as shown in fig. 8, the bimetallic strip 2 is located in the mounting groove 3, the upper end of the bimetallic strip 2 is fixed on the Y-shaped support 8 through the attachment of the clamping hook 7 on the clamping jaw 5, the clamping hook 7 is clamped with the Y-shaped support 8, the bottom of the jaw body 6 is clamped and fixed with the limiting rod 10, and the lower end of the bimetallic strip 2 is attached inwards to the oil drainage hole 4 to close the same at normal temperature.

As shown in fig. 9, when the temperature of the oil rises to the preset temperature, the upper end of the bimetallic strip 2 is fixed, the lower end of the bimetallic strip bends outwards to be attached to the claw body 6, the oil drain hole 4 is opened, and the inner oil pan and the outer oil pan are communicated with each other.

In this embodiment, the inner side refers to a side horizontally adjacent to the housing 1, as shown in the right side of fig. 8-9; outside to the side horizontally remote from the housing 1, as shown on the left in fig. 8-9.

Claims

1. An inner oil sump with a bimetallic strip temperature control structure is characterized by comprising a shell (1) and a bimetallic strip assembly,

an oil drainage hole (4) is formed in the shell (1), the bimetallic strip assembly closes the oil drainage hole (4) at normal temperature and bends to deform to open the oil drainage hole (4) when the bimetallic strip assembly is heated;

the bimetallic strip assembly comprises a jaw (5) and a bimetallic strip (2) which is bent and deformed along the length direction when being heated, and the jaw (5) fixes the bimetallic strip (2) on the shell (1);

the casing (1) is provided with a mounting groove (3) formed by an inner recess, the oil drainage hole (4) is formed in the bottom of the mounting groove (3), and a clamping structure matched with the clamping jaw (5) is arranged in the mounting groove (3) to fix the head end of the bimetallic strip (2);

y type support (8) that the joint structure evenly extends for following bimetallic strip (2) width direction, Y type support (8) include that mounting groove (3) tank bottom extends and forms base plate (8.1) to and base plate (8.1) are closing on fork board (8.2) that casing (1) one side set up, fork board (8.2) both ends are equipped with connection piece (8.3) and are connected with casing (1).

2. The inner oil pan with the bimetallic strip temperature control structure as in claim 1, characterized in that the claw (5) comprises a claw body (6) and a hook (7) bent at one end of the claw body (6) corresponding to the head end of the bimetallic strip (2), the claw body (6) extends towards the tail end of the bimetallic strip (2) and gradually gets away from the oil drainage hole (4), and the end of the hook (7) is provided with a first latch (7.1).

3. The inner oil pan with the bimetallic strip temperature control structure as claimed in claim 2, wherein the head end of the bimetallic strip (2) is bent to be attached to the end face of the base plate (8.1), the hook (7) presses the head end of the bimetallic strip (2), the first latch (7.1) is clamped with one side of the fork plate (8.2) close to the shell (1), and two sides of the hook (7) are matched with the connecting piece (8.3) for limiting.

4. The inner sump according to claim 2, wherein the wall of the mounting groove (3) is relatively protruded to form a mounting groove (9), the claw (6) is mounted in the mounting groove (9) and the bottom of the claw is engaged with the mounting groove (9).

5. The inner oil pan with the bimetallic strip temperature control structure as in claim 4, characterized in that the claw body (6) is provided with a leakage hole (6.4) corresponding to the oil drainage hole (4), and the claw body (6) is provided with first flanges (6.1) along two sides of the bimetallic strip (2) in the width direction to be matched with the side walls of the mounting grooves (9).

6. The inner oil pan with the bimetallic strip temperature control structure as in claim 4, wherein a second flanging (6.2) is arranged at the bottom of the claw body (6), a limiting rod (10) is arranged in the mounting groove (9), and a second latch (6.3) is arranged on the second flanging (6.2) and is in fit clamping connection with the limiting rod (10).

7. The inner oil pan with the bimetallic strip temperature control structure as in claim 1, wherein the oil drainage hole (4) is a curved hole which is bent towards the inside of the casing (1), the bimetallic strip (2) is an arc-shaped strip which is attached to the oil drainage hole (4) at normal temperature, and the tail end of the bimetallic strip (2) is bent towards the outside of the casing (1) to be attached to the claw (5) when the bimetallic strip (2) is heated.