Crankcase pressure sensor

Abstract

The utility model relates to a crankcase pressure sensor comprising a housing, a protective cover and a protective cover. The top of the shell is provided with a first air inlet, and two sides are provided with clamping grooves. The protective cover covers the first air inlet hole; the protective cover covers the top of the shell, the two sides of the protective cover are each provided with a first buckle and a second buckle, the first buckles on the two sides of the protective cover are matched with the first clamping grooves in the two sides of the shell, and clamping hooks are arranged at the bottoms of the first buckles and the bottoms of the second buckles and used for buckling the lower edge of the side face of the shell. Clamping blocks are arranged on the two sides of the protective cover and located between the first buckle and the second buckle, and grooves are formed in the inner sides of the clamping blocks. After the protective cover is additionally arranged, the protective cover is protected, the air channel gap of the protective cover cannot be blocked in the assembly paint spraying process, external air can enter the protective cover through the groove and then enter the shell through the air channel gap and the first air inlet, and normal use of the product cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sensor technical field, especially, a kind of crankcase pressure sensor. BACKGROUND

[0002] Crankcase pressure sensor is a differential pressure sensor, for measuring the pressure difference between crankcase and atmospheric pressure, as shown in Fig. Figure 1 The commonly used crankcase pressure sensor structure currently includes 1, shell, pressure chip is arranged in the shell, the top of the shell has first air inlet hole, the first air inlet hole is covered with 2, protective cover, protective cover 2 and 1 shell between have 12, air passage gap, the bottom of the shell has 10, second air inlet hole, when using, first air inlet hole is communicated with the outside through the air passage gap 12 of protective cover, second air inlet hole 10 is communicated with crankcase, pressure chip senses the pressure difference between crankcase and outside atmospheric pressure and is converted into voltage signal after amplification conditioning and analog-digital conversion operation, this voltage signal is input into ECU via pin, and then as reference basis for subsequent action of ECU.

[0003] The problem of the current crankcase pressure sensor is that the client and the crankcase mechanism component are assembled after the pressure sensor, the client will be painted in an assembly, the air passage gap of protective cover is easily blocked in the assembly painting process, the first air inlet hole cannot be communicated with the outside atmosphere, and then the product function is affected. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a kind of crankcase pressure sensor, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the utility model is realized by the following technical solutions:

[0006] A kind of crankcase pressure sensor, including

[0007] Shell, top has first air inlet hole, both sides have clamping slot;

[0008] Protective cover, cover is arranged on the first air inlet hole;

[0009] Protective cover, cover is arranged on the top of the shell, above the protective cover, the both sides of the protective cover are equipped with first buckle and second buckle, the first buckle of the both sides of the protective cover is matched with the first clamping slot of the both sides of the shell, the bottom of the first buckle and second buckle has clamping hook, for buckling the lateral lower edge of the shell. The clamping block between the first buckle and the second buckle of the both sides of the protective cover is equipped with clamping block, the inner side of the clamping block has recess.

[0010] Preferably, the second buckle has a width greater than the width of the first buckle.

[0011] Preferably, the edge of the protective cover has a notch.

[0012] Preferably, the bottom of the protective cover has three protrusions, the three protrusions are in contact with the top of the shell, and the part of the bottom of the protective cover not in contact with the top of the shell forms an air passage gap.

[0013] Preferably, the bottom of the shell has a second air inlet hole, and a pressure chip is arranged in the shell.

[0014] The utility model provides a kind of crankcase pressure sensor, with following beneficial effects:

[0015] After the protective cover cover is arranged on the top of the shell, the first buckle is clamped in the first clamping groove, and the first buckle, the second buckle and the clamping block are tightly attached to the side surface of the shell.The first buckle, the second buckle and the clamping block are buckled to the lower edge of the side surface of the shell by the clamping hook.After the above arrangement, the protective cover is stably fixed on the shell.After increasing the protective cover, the protective effect of the protective cover is achieved, and the air passage gap of the protective cover will not be blocked during the assembly painting process, and the external atmosphere can enter the protective cover through the groove, then enter the shell through the air passage gap and the first air inlet hole, without affecting the normal use of the product. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of crankcase pressure sensor without increasing protective cover;

[0017] Figure 2 It is a structural schematic diagram of crankcase pressure sensor after increasing protective cover;

[0018] Figure 3 It is a structural schematic of protective cover Figure 1 ;

[0019] Figure 4 It is a structural schematic of protective cover Figure 2 .

[0020] In the figure: 1, shell;2, protective cover;3, protective cover;4, first buckle;5, second buckle;6, clamping hook;7, clamping block;8, groove;9, notch;10, second air inlet hole;11, clamping groove;12, air passage gap. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below combined with the drawings of the utility model.

[0022] The technical solutions of the present application will be described clearly and completely below in connection with the embodiments. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0024] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, "a plurality of" means two or more, unless otherwise explicitly specified. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiments

[0026] Reference Figures 1-4 A crankcase pressure sensor, comprising

[0027] The shell 1 has a first air inlet hole at the top and clamping grooves 11 on both sides;

[0028] The protective cover 2 is provided on the first air inlet hole;

[0029] A protective cover 3 is arranged on the top of the shell 1 above the protective cover 2, both sides of the protective cover 3 are provided with a first buckle 4 and a second buckle 5, the first buckle 4 on both sides of the protective cover 3 is matched with the first clamping groove 11 on both sides of the shell 1, the bottom of the first buckle 4 and the second buckle 5 is provided with a clamping hook 6 for buckling the lower edge of the side surface of the shell 1, and the clamping block 7 is arranged between the first buckle 4 and the second buckle 5 on both sides of the protective cover 3, and the inner side of the clamping block 7 is provided with a groove 8.

[0030] After the protective cover 3 is arranged on the top of the shell 1, the first buckle 4 is clamped in the first clamping groove 11, the first buckle 4, the second buckle 5 and the clamping block 7 are tightly attached to the side surface of the shell 1, the first buckle 4 and the second buckle 5 buckle the lower edge of the side surface of the shell 1 through the clamping hook 6, and after the above arrangement, the protective cover 3 is stably fixed on the shell 1. After the protective cover 3 is increased, the protective cover 2 has a protective effect, the air passage gap 12 of the protective cover 2 will not be blocked during the assembly painting process, and the external atmosphere can enter the protective cover 3 through the groove 8, and then enter the shell 1 through the air passage gap 12 and the first air inlet, which will not affect the normal use of the product.

[0031] The clamping groove 11 is a structure originally existing in the crankcase pressure sensor itself, the first buckle 4 of the protective cover 3 is matched with the clamping groove 11, and the original structure is fully utilized, and a clamping groove does not need to be separately arranged.

[0032] In a specific embodiment, the width of the second buckle 5 is greater than the width of the first buckle 4, which can prevent errors during installation of the protective cover 3.

[0033] In a specific embodiment, the edge of the protective cover 3 has a notch 9, which is used as an air inlet, and the notch 9 increases the air inlet under the condition that the groove 8 can ensure normal air intake, which is more conducive to the entry of external atmosphere, and preferably, the notch 9 is designed in a special shape, which is conducive to preventing blockage.

[0034] In a specific embodiment, the bottom of the protective cover 2 has three protrusions, the three protrusions are in contact with the top of the shell 1, and the part of the bottom of the protective cover 2 not in contact with the top of the shell 1 forms an air passage gap 12.

[0035] In a specific embodiment, the bottom of the shell 1 is provided with a second air inlet 10, and the shell 1 is provided with a pressure chip.

[0036] The crankcase pressure sensor in use, the outside atmosphere enters the protective cover 3 through the recess 8, then enters the shell 1 through the air passage gap 12 and the first air inlet hole, and the second air inlet hole 10 is communicated with the crankcase, the pressure chip senses the pressure difference between the crankcase and the outside atmosphere and is converted into a voltage signal after amplification conditioning and analog-digital conversion operation, the voltage signal is input into the ECU through the pin, and then serves as the reference basis for the subsequent action of the ECU.

[0037] The above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A crankcase pressure sensor, characterized by: The utility model relates to a shell, top has first air inlet hole, both sides have clamping groove Protective cover, cover is located on first air inlet hole Protective cover, cover is located on the top of shell, is located above protective cover, both sides of protective cover are equipped with first buckle and second buckle, first buckle of both sides of protective cover is matched with first clamping groove of both sides of shell, the bottom of first buckle and second buckle has the hook for buckling the lateral lower edge of shell, the clamping block is equipped between first buckle and second buckle of both sides of protective cover, the inside of clamping block has recess. The width of second buckle is greater than the width of first buckle.

2. A crankcase pressure sensor according to claim 1, characterised in that: The edge of protective cover has notches.

3. A crankcase pressure sensor according to claim 1, characterised in that: The bottom of protective cover has three protrusions, three protrusions contact with the top of shell, the part of protective cover bottom not contacting with the top of shell forms airway gap.

4. A crankcase pressure sensor according to claim 1, characterized in that: The bottom of shell has second air inlet hole, and pressure chip is arranged in the shell.

5. A crankcase pressure sensor according to claim 1, characterized in that: ​

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