Engine oil pressure alarm with threaded hole air leakage structure

Abstract

The utility model relates to an engine oil pressure alarm with a threaded hole air leakage structure, which comprises an installation base of the pressure alarm, a static contact piece and a dynamic contact piece which are abutted against each other are arranged in the installation base, a rubber upper shell is riveted in the installation base on the upper side of the dynamic contact piece, and an annular copper insert is fixedly embedded in the upper portion of the rubber upper shell. A spring is inserted into the rubber upper shell on the lower side of the copper insert; two ends of the spring are respectively propped against the movable contact piece and the copper insert; threaded holes are formed in the copper inserts, and bolts are connected into the threaded holes of the copper inserts in a threaded mode. The pressure alarm is simple and compact in structure and low in manufacturing cost, and meanwhile, a fit clearance in threaded connection is used for replacing a pressure relief hole, so that water prevention can be realized, and pressure relief is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pressure alarm, more particularly to an oil pressure alarm with a threaded hole air release structure. BACKGROUND

[0002] The oil pressure alarm is a part of an engine, and the existing oil pressure alarm designed, produced and assembled as shown in the drawings has a main body including a lower mounting base 1 and an upper rubber shell seat 4', and the main body is provided with a static contact piece 2 and a dynamic contact piece 3. Figure 1 In order to realize pressure relief in the main body, a pressure relief hole 41' is formed in the rubber shell seat 4', and in order to prevent dust and impurities from entering the oil pressure alarm through the pressure relief hole 41', a dust cover 11 is provided on the outside of the oil pressure alarm. However, non-road vehicles have a harsh working environment, such as tractors, harvesters and excavators, which may be involved in water and the water height reaches the installation height of the oil pressure alarm or the engine is washed with a high-pressure water gun after use. The above conditions will cause the dust cover 11 at the upper end of the oil pressure alarm to fail, water will enter the oil pressure alarm through the pressure relief hole 41', and the static contact piece 2 and the dynamic contact piece 3 will be ablated and welded together, thereby causing the engine oil pressure alarm light to be always on. Therefore, there is an urgent need for an oil pressure alarm that is not easy to enter water, stable and reliable, and has low design, production and manufacturing costs. SUMMARY

[0003] The utility model discloses a kind of oil pressure alarms with threaded hole air release structure, which is simple and compact in structure, low in manufacturing cost, and uses the cooperation gap of threaded connection to replace pressure relief hole, that is, it can realize waterproofing while not affecting pressure relief.

[0004] An oil pressure alarm with threaded hole air release structure includes a mounting base of a pressure alarm, a static contact piece and a dynamic contact piece abutting against each other are arranged in the mounting base, a rubber upper shell is riveted in the mounting base on the upper side of the dynamic contact piece, a copper insert in the shape of a ring is fixed in the upper part of the rubber upper shell, a spring is inserted into the rubber upper shell on the lower side of the copper insert, and the two ends of the spring abut against the dynamic contact piece and the copper insert respectively.

[0005] The copper insert is formed with a threaded hole, and a bolt is screwed into the threaded hole of the copper insert.

[0006] Preferably, the lower end of the rubber upper shell is inserted into and pressed against the mounting base, an annular table is formed on the outer wall of the upper part of the rubber upper shell, and the outer ring of the upper end of the mounting base is pressed and deformed to be held on the stepped surface of the annular table of the rubber upper shell.

[0007] Preferably, the lower end of the bolt extends out of the copper insert and is inserted into the spring. A rubber washer, a flat washer, and a spring washer are sequentially inserted into the bolt on the upper side of the rubber upper shell, with the rubber washer sandwiched between the flat washer and the rubber upper shell.

[0008] Preferably, the diameters of the inner rings of the flat washer and the rubber washer are both larger than the diameter of the screw on the bolt. The inner ring of the rubber washer is formed with an upwardly extending sleeve, which is pasted and fixed to the inner wall of the flat washer. The upper end of the extension sleeve is formed with a conical sealing lip, and the upper end of the sealing lip is inserted into the spring washer and abuts against the bolt.

[0009] Preferably, the rubber upper shell is made of hard rubber, and the copper insert and the rubber upper shell are integrally molded by injection molding.

[0010] Preferably, the outer wall of the copper insert is formed with several circular raised rings, which are embedded in the rubber upper shell.

[0011] The beneficial effects of this utility model are as follows:

[0012] This pressure alarm has a simple and compact structure and low manufacturing cost. It uses the fit clearance of the threaded connection to replace the pressure relief hole, which can achieve waterproofing without affecting the pressure relief. Attached image description:

[0013] Figure 1 A cross-sectional structural diagram of an existing pressure alarm;

[0014] Figure 2 This is a cross-sectional view of the pressure alarm device of this utility model;

[0015] Figure 3 This is a partial cross-sectional view of the upper part of the inner bolt of this utility model.

[0016] In the diagram: 1. Mounting base; 2. Static contact; 3. Moving contact; 4. Rubber upper shell; 4'. Rubber shell seat; 41. Vent hole; 5. Copper insert; 6. Bolt; 7. Spring; 8. Rubber washer; 9. Flat washer; 10. Spring washer; 11. Dust cover. Detailed implementation method:

[0017] Example: See Figure 2 , 3 As shown, an oil pressure alarm with a threaded hole venting structure includes a mounting base 1 for the pressure alarm. The mounting base 1 has a stationary contact 2 and a moving contact 3 that abut against each other. A rubber upper shell 4 is riveted to the mounting base 1 on the upper side of the moving contact 3. An annular copper insert 5 is embedded and fixed in the upper part of the rubber upper shell 4. A spring 7 is inserted in the rubber upper shell 4 on the lower side of the copper insert 5. The two ends of the spring 7 abut against the moving contact 3 and the copper insert 5, respectively.

[0018] The copper insert 5 is internally formed with a threaded hole, and a bolt 6 is screwed into the threaded hole of the copper insert 5.

[0019] The lower end of the rubber upper shell 4 is inserted into and pressed against the mounting base 1, the outer wall of the upper portion of the rubber upper shell 4 is formed with an annular platform, the outer ring of the upper end of the mounting base 1 is stamped and deformed to be pressed on the stepped surface of the annular platform of the rubber upper shell 4, and the rubber upper shell 4 and the mounting base 1 are conveniently mounted and connected.

[0020] The lower end of the bolt 6 extends out of the copper insert 5 and is inserted into the spring 7, the bolt 6 can position the upper end of the spring 7, the rubber washer 8, the flat washer 9 and the spring washer 10 are sequentially inserted into the bolt 6 on the upper side of the rubber upper shell 4, the rubber washer 8 is clamped between the flat washer 9 and the rubber upper shell 4, and the rubber washer 8 can prevent water from entering the threaded hole of the copper insert 5.

[0021] The inner circle of the flat washer 9 and the rubber washer 8 is larger than the diameter of the screw rod of the bolt 6, the inner circle of the rubber washer 8 is formed with an upwardly extending extension sleeve 81, the extension sleeve 81 is pasted and fixed on the inner wall of the flat washer 9, the upper end of the extension sleeve 81 is formed with a conical sealing lip 82, the sealing lip 82 is inserted into the spring washer 10 and abuts against the bolt 6, and the sealing lip 82 can further improve the waterproof effect when the pressure alarm is involved in water, but does not affect the pressure inside the pressure alarm.

[0022] The rubber upper shell 4 is made of hard rubber, the copper insert 5 and the rubber upper shell 4 are integrally formed by injection molding, and the copper insert 5 and the rubber upper shell 4 form an integrated rubber shell.

[0023] The outer wall of the copper insert 5 is formed with a plurality of circular convex rings 51, the convex rings 51 are embedded in the rubber upper shell 4, the convex rings 51 can increase the contact area between the copper insert 5 and the rubber upper shell 4, and the connection between the two is more firm and reliable.

[0024] Working principle: the structure is an oil pressure alarm with a threaded hole venting structure, the pressure alarm mainly utilizes the copper insert 5 to connect the bolt 6, utilizes the threaded gap between the bolt 6 and the copper insert 5 as a pressure relief channel, the pressure relief channel can limit water from entering the pressure alarm, but gas can be output from the pressure alarm through the pressure relief channel.

[0025] The embodiments are used to illustratively explain the utility model, and are not used to limit the utility model. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the utility model, and therefore the protection scope of the utility model should be as listed in the claims of the utility model.

Claims

1. An oil pressure alarm with a threaded hole air leakage structure, comprising a mounting base (1) of the pressure alarm, a static contact (2) and a dynamic contact (3) are arranged in the mounting base (1) and abut against each other, a rubber upper shell (4) is riveted in the mounting base (1) on the upper side of the dynamic contact (3), characterized in that: The upper part of the rubber upper shell (4) is embedded with an annular copper insert (5), and a spring (7) is inserted in the rubber upper shell (4) below the copper insert (5), with both ends of the spring (7) abutting against the movable contact (3) and the copper insert (5) respectively; The copper insert (5) is formed with a threaded hole, and a bolt (6) is screwed in the threaded hole of the copper insert (5).

2. An oil pressure warning device with a venting structure having a threaded hole according to claim 1, characterized in that: The lower end of the rubber upper shell (4) is inserted and pressed against the mounting base (1), and the outer wall of the upper part of the rubber upper shell (4) is formed with an annular platform, and the outer ring of the upper end of the mounting base (1) is pressed and deformed to be held on the stepped surface of the annular platform of the rubber upper shell (4).

3. An oil pressure warning device with a venting structure having a threaded hole according to claim 1, characterized in that: The lower end of the bolt (6) extends out of the copper insert (5) and is inserted in the spring (7), and the bolt (6) on the upper side of the rubber upper shell (4) is sequentially inserted with a rubber washer (8), a flat washer (9) and a spring washer (10), and the rubber washer (8) is clamped between the flat washer (9) and the rubber upper shell (4).

4. An oil pressure warning device with a venting structure having a threaded hole according to claim 3, characterized in that: The diameters of the inner circles of the flat washer (9) and the rubber washer (8) are both greater than the diameter of the screw rod of the bolt (6), the inner circle of the rubber washer (8) is formed with an upwardly extending extension sleeve (81), the extension sleeve (81) is pasted and fixed on the inner wall of the flat washer (9), the upper end of the extension sleeve (81) is formed with a conical sealing lip (82), and the sealing lip (82) is inserted in the spring washer (10) and abuts against the bolt (6).

5. An oil pressure warning device with a venting structure having a threaded hole according to claim 1, wherein: The rubber upper shell (4) is made of hard rubber, and the copper insert (5) and the rubber upper shell (4) are integrally formed by injection molding.

6. An oil pressure warning device with a venting structure having a threaded hole according to claim 1, characterized in that: The outer wall of the copper insert (5) is formed with a plurality of circular convex rings (51), and the convex rings (51) are embedded in the rubber upper shell (4).

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