Sensor mounting device for measuring valve lift of engine

Abstract

The utility model discloses a sensor mounting device used for measuring engine valve lift, which comprises an oil injector fixing frame and a support frame, the oil injector fixing frame is fixed on an oil injector, the support frame is integrally connected with one side of the oil injector fixing frame, a welding fin plate is movably connected below the oil injector fixing frame and / or the support frame, and the welding fin plate is fixed on the oil injector fixing frame. The welding fin plate is fixedly connected with the valve spring seat, and a displacement sensor used for detecting the vertical movement amount of the welding fin plate is arranged on the oil sprayer fixing frame and / or the supporting frame. By means of the mode, a plurality of sensors can be installed, the overall integration degree is higher, installation is more convenient, and the accuracy of measuring the valve lift is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valve measurement, in particular to a sensor installation device for measuring the lift of an engine valve. Background Art

[0002] The engine valve is an important part of the engine valve train. It opens and closes regularly to ensure that the engine regularly inhales fresh combustible mixture into the cylinder and discharges the exhaust gas from the cylinder in time. Whether it is reliable directly affects the performance of the engine. Especially with the development of engine technology, the pressure in the cylinder increases, the speed increases, and the valve seating speed is often very high. The valve lift is one of the items that need to be tested after the engine is assembled.

[0003] Generally speaking, the lift of the engine valve can be measured by a displacement sensor. This often requires that the corresponding valve to be tested must be equipped with a corresponding sensor. In the past, sensor brackets were mostly designed independently for each valve. Due to the large number of sensors, each sensor needs to be installed, positioned, adjusted in height, and locked, which takes a lot of time. In addition, due to the small space above the engine and the large number of parts, the operator's operating space is quite limited. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a sensor installation device for measuring the lift of an engine valve, which can install multiple sensors, has a higher overall integration, is easier to install, and ensures the accuracy of measuring the lift of the valve.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a sensor installation device for measuring the lift of the engine valve, including: an injector fixing frame and a support frame, the injector fixing frame is fixed on the injector, the support frame is integrally connected to one side of the injector fixing frame, a welding fin plate is movably connected to the bottom of the injector fixing frame and / or the support frame, the welding fin plate is fixedly connected to the valve spring seat, and a displacement sensor for detecting the up and down movement of the welding fin plate is arranged on the injector fixing frame and / or the support frame.

[0006] Preferably, the injector fixing frame and / or the support frame has a guide rod extending toward the welding fin plate, a guide hole is provided on the welding fin plate, and the guide rod cooperates with the guide hole so that the circumferential angle of the welding fin plate remains unchanged.

[0007] Preferably, the fuel injector fixing frame is provided with a penetrating positioning step hole, the positioning step hole cooperates with the fuel injector, the fuel injector fixing frame is provided with a locking opening and a locking bolt, and the locking bolt passes through the locking opening to enable the fuel injector fixing frame to hold the fuel injector tightly.

[0008] Preferably, an observation bayonet is provided on the inner side of the injector fixing bracket.

[0009] Preferably, a mounting plate is extended from one side of the injector fixing frame, a first threaded hole is formed on the mounting plate, and the displacement sensor is connected to the mounting plate through the first threaded hole.

[0010] Preferably, a second threaded hole is provided on the support frame, and the displacement sensor is connected to the support frame through the second threaded hole.

[0011] Preferably, it also includes a tightening sleeve, which is used to tighten the bolts on the displacement sensor, and the tightening sleeve is provided with a deformation hole.

[0012] Preferably, it also includes a third positioning sleeve, which provides positioning for the welding fin plate below the support frame when it is welded to the spring seat, and the third positioning sleeve is also provided with a deformation hole.

[0013] Preferably, a avoidance groove is provided at the bottom of the third positioning sleeve.

[0014] Preferably, it also includes a second positioning sleeve, which is sleeved on the injector and provides positioning for the welding fin plate below the injector fixing frame and the spring seat when being welded.

[0015] The beneficial effects of the utility model are:

[0016] 1. The device is better integrated through the integral connection between the injector fixing frame and the support frame, which makes it easier for operators to install;

[0017] 2. By fixing the welded fin plate to the spring seat of the valve, the welded fin plate is displaced synchronously when the valve is lifted. The displacement sensor measures the displacement of the welded fin plate to obtain the lift value of the valve. The guide rod is used to avoid changes in the circumferential angle of the welded fin plate, thereby ensuring the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is another perspective structural schematic diagram of the utility model as a whole;

[0020] Figure 3 It is a structural schematic diagram of the tightening sleeve of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the second positioning sleeve of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the third positioning sleeve of the utility model.

[0023] The markings of the components in the accompanying drawings are as follows:

[0024] 1. Injector fixing frame; 2. Support frame; 3. Welding fin plate; 4. Displacement sensor; 5. Guide rod;

[0025] 7. Positioning step hole; 8. Locking hole; 9. Locking bolt; 10. Observation bayonet; 11. Tightening sleeve;

[0026] 12. Avoidance hole; 13. Second positioning sleeve; 14. Mounting plate; 15. Third positioning sleeve; 16. Avoidance groove; 17. Avoidance groove. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0033] Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0034] Example:

[0035] refer to Figure 1 and Figure 2, a sensor installation device for measuring the lift of an engine valve, comprising: an injector fixing frame 1 and a support frame 2, the injector fixing frame 1 is fixed on the injector, and the support frame 2 is integrally connected to one side of the injector fixing frame 1, so the injector fixing frame 1 and the support frame 2 are integrally formed, so that the integration is better and the installation is convenient, and a welding fin plate 3 is movably connected to the bottom of the injector fixing frame 1 and / or the support frame 2, and the welding fin plate 3 is fixedly connected to the valve spring seat, so when the valve lifts, the upper end of its valve spring also rises together, so that the welding fin plate 3 rises synchronously, and a displacement sensor 4 for detecting the up and down movement amount of the welding fin plate 3 is arranged on the injector fixing frame 1 and / or the support frame 2, and the displacement sensor 4 is arranged toward the welding fin plate 3, so that the displacement sensor 4 can measure the displacement amount of the welding fin plate 3, thereby obtaining the value of the valve lift, and then detecting whether the valve lift is within the specified range.

[0036] refer to Figure 1 and Figure 2 In order to avoid the circumferential angle rotation of the welding fin plate 3 during operation and affect the measurement accuracy, the injector fixing frame 1 and / or the support frame 2 extends a guide rod 5 toward the welding fin plate 3, and a guide hole is opened on the welding fin plate 3, so that the guide rod 5 passes through the guide hole on the welding fin plate 3, thereby avoiding the rotation of the welding fin plate 3, so that the circumferential angle of the welding fin plate 3 remains unchanged, thereby ensuring the accuracy of the measurement.

[0037] refer to Figure 1 and Figure 2 In order to fix the position of the fuel injector fixing frame 1 and further fix the position of the entire device, the fuel injector fixing frame 1 is provided with a through positioning step hole 7, which matches the fuel injector. The fuel injector fixing frame 1 is provided with a locking port 8 and a locking bolt 9, which passes through the locking port 8 to allow the fuel injector fixing frame 1 to hold the fuel injector tightly. The fuel injector fixing frame 1 is sleeved on the fuel injector by using the gap of the locking port 8 and the positioning step hole 7, and then the locking bolt 9 is tightened to force the fuel injector fixing frame 1 to be clamped on the fuel injector.

[0038] refer to Figure 1 and Figure 2 In order to further ensure the stability of the injector fixing bracket 1 on the injector, an observation bayonet 10 is opened on the inner side of the injector fixing bracket 1. There is a straight section on the injector. When the observation bayonet 10 and the straight section of the injector are in a straight line, it means that the injector fixing bracket 1 has not rotated.

[0039] refer to Figure 1 and Figure 2In order to facilitate the installation of the displacement sensor 4, a mounting plate 14 is extended from one side of the injector fixing frame 1. A first threaded hole is opened on the mounting plate 14, and the displacement sensor 4 is connected to the mounting plate 14 through the first threaded hole. A second threaded hole is opened on the support frame 2, and the displacement sensor 4 is connected to the support frame 2 through the second threaded hole.

[0040] refer to Figure 1-Figure 5 ,refer to Figure 1 , Figure 2 and Figure 3 In order to ensure the accuracy of the position of the welding fin plate 3 under the support frame 2 and to facilitate the installation of the device, the device also includes a third positioning sleeve 15 and a tightening sleeve 11. The tightening sleeve 11 is used to tighten the bolts on the displacement sensor 4. The third positioning sleeve 15 provides positioning when the welding fin plate 3 under the support frame 2 is welded to the spring seat. The tightening sleeve 11 and the third positioning sleeve 15 are both provided with a deformation hole 12, and the deformation hole 12 is set through the tightening sleeve 11. Through the deformation holes 12 in the tightening sleeve 11 and the third positioning sleeve 15, the tightening sleeve 11 and the third positioning sleeve 15 can be slightly deformed to adapt to the size change of the accessories within the tolerance;

[0041] When installing the welded fin plate 3 under the support frame, the third positioning sleeve 15 is inserted into the bolt on the engine housing to determine the position of the third positioning sleeve 15 on the engine housing, and then one side of the welded fin plate 3 under the support frame 2 is against the side of the third positioning sleeve 15, and the other side is connected to the spring seat, thereby determining the position of the welded fin plate 3 under the support frame 2. And by tightening the sleeve 11, the bolt on the displacement sensor 4 is rotated deep into the narrow space to tighten the position of the displacement sensor 4. In order to make the third positioning sleeve 15 better match the bolt on the engine housing, a avoidance groove 16 is opened inside the bottom of the third positioning sleeve.

[0042] refer to Figure 1 , Figure 2 and Figure 4 In order to ensure the accuracy of the position of the welded fin plate 3 under the injector fixing frame 1 and to facilitate the installation of the device, the device also includes a second positioning sleeve 13, which is sleeved on the injector and provides positioning for the welded fin plate 3 under the injector fixing frame 1 and the spring seat during welding. When installing the welded fin plate 3 under the injector fixing frame 1, the second positioning sleeve 13 is sleeved on the injector to determine the position of the second positioning sleeve 13 on the engine housing, and then one side of the welded fin plate 3 under the injector fixing frame 1 is abutted against the side of the second positioning sleeve 13, and the other side is connected to the spring seat, thereby determining the position of the welded fin plate 3 under the injector fixing frame 1.

[0043] refer to Figure 4and Figure 5 In order to use the third positioning sleeve 15 and the second positioning sleeve 13 simultaneously in a narrow and compact space in the engine, an avoidance groove 17 is opened on the side of the third positioning sleeve 15 close to the second positioning sleeve 13, so that the third positioning sleeve 15 can fit more compactly with the second positioning sleeve 13, thereby adapting to use in a narrow and compact space.

[0044] refer to Figure 1-Figure 4 , Installation process: determine the position of the welding fin plate 3 through the third positioning sleeve 15 and the second positioning sleeve 13, and weld the welding fin plate 3 to the spring seat, then remove the third positioning sleeve 15 and the second positioning sleeve 13 and fix them on the injector through the injector fixing frame 1, then install the displacement sensor 4 to the injector fixing frame 1 and the support frame 2, and then tighten the displacement sensor 4 with the tightening sleeve 11.

[0045] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sensor installation device for measuring engine valve lift, characterized in that: include: An injector fixing frame (1) and a support frame (2), wherein the injector fixing frame (1) is fixed on the injector, and the support frame (2) is integrally connected to one side of the injector fixing frame (1). A welding fin plate (3) is movably connected below the injector fixing frame (1) and / or the support frame (2), and the welding fin plate (3) is fixedly connected to a valve spring seat. A displacement sensor (4) for detecting the amount of up and down movement of the welding fin plate (3) is provided on the injector fixing frame (1) and / or the support frame (2).

2. A sensor installation device for measuring engine valve lift according to claim 1, characterized in that: The injector fixing frame (1) and / or the support frame (2) are provided with a guide rod (5) extending toward the welding fin plate (3); a guide hole is provided on the welding fin plate (3); the guide rod (5) cooperates with the guide hole so that the circumferential angle of the welding fin plate (3) remains unchanged.

3. A sensor installation device for measuring engine valve lift according to claim 1, characterized in that: The fuel injector fixing frame (1) is provided with a penetrating positioning step hole (7), the positioning step hole (7) is matched with the fuel injector, the fuel injector fixing frame (1) is provided with a locking opening (8) and a locking bolt (9), the locking bolt (9) passes through the locking opening (8) so that the fuel injector fixing frame (1) holds the fuel injector tightly.

4. A sensor installation device for measuring engine valve lift according to claim 3, characterized in that: An observation bayonet (10) is provided on the inner side of the injector fixing frame (1).

5. A sensor installation device for measuring engine valve lift according to claim 1 or 4, characterized in that: A mounting plate (14) extends from one side of the injector fixing frame (1), a first threaded hole is provided on the mounting plate (14), and the displacement sensor (4) is connected to the mounting plate (14) through the first threaded hole.

6. A sensor installation device for measuring engine valve lift according to claim 1 or 2, characterized in that: The support frame (2) is provided with a second threaded hole, and the displacement sensor (4) is connected to the support frame (2) via the second threaded hole.

7. A sensor installation device for measuring engine valve lift according to claim 1, characterized in that: It also comprises a tightening sleeve (11), which is used to tighten the bolts on the displacement sensor (4), and the tightening sleeve (11) is provided with a deformation hole (12).

8. A sensor installation device for measuring engine valve lift according to claim 1 or 7, characterized in that: It also includes a third positioning sleeve (15), which provides positioning for the welding fin plate (3) below the support frame (2) and the spring seat when being welded, and the third positioning sleeve (15) is also provided with a deformation hole (12).

9. A sensor installation device for measuring engine valve lift according to claim 8, characterized in that: A avoiding groove (16) is formed at the bottom of the third positioning sleeve (15).

10. A sensor installation device for measuring engine valve lift according to claim 1, characterized in that: It also includes a second positioning sleeve (13), which is sleeved on the fuel injector and provides positioning for the welding fin plate (3) below the fuel injector fixing frame (1) when welding with the spring seat.

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