High-precision engine sensor support capable of being quickly disassembled and assembled

Abstract

The utility model discloses a high-precision quickly-assembled and disassembled engine sensor support which comprises a support plate, one end of the support plate is provided with a fixing hole, the fixing hole is detachably provided with a fixing piece used for fixing the support plate on an engine cylinder cover, the other end of the support plate is provided with a mounting hole facing a valve rod, and a sensor is arranged in the mounting hole. A connecting hole is formed in the upper end of the valve rod, a follower is connected to the connecting hole, and the sensor is used for measuring the displacement of the follower; through the above mode, dismounting of the sensor support plate and high-precision measurement of the displacement of the valve rod can be rapidly completed.

Description

Technical Field

[0001] The utility model relates to the technical field of engine valve lift measurement, in particular to a high-precision and fast-disassembly engine sensor bracket. 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] A Chinese patent with announcement number CN203148410U discloses an engine valve lift sensor mounting device, which mounts a valve spring upper seat on a valve spring so that when the valve spring lifts, the valve spring upper seat is driven to move up and down. The lift sensor measures the displacement of the valve spring upper seat to obtain the valve lift data. The combination of the rail and the slot prevents the valve spring upper seat from rotating during operation.

[0004] However, this device needs to restrict the rotation of the valve stem, and has many parts, which is easy to be installed incorrectly and takes a long time to install and disassemble. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a high-precision and fast-disassembly engine sensor bracket, which can quickly complete the disassembly and assembly of the sensor support plate and measure the displacement of the valve stem with high precision.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a high-precision and quickly disassembled engine sensor bracket, including: a support plate, a fixing hole is opened at one end of the support plate, and a fixing part for fixing the support plate to the engine cylinder head is detachably provided in the fixing hole, and a mounting hole is opened at the other end of the support plate toward the valve stem, a sensor is arranged in the mounting hole, and a connecting hole is opened at the upper end of the valve stem, a follower is connected to the connecting hole, and the sensor is used to measure the displacement of the follower.

[0007] Preferably, the support plate comprises a mounting portion, a supporting portion and a fixing portion, wherein the mounting portion and the fixing portion are respectively distributed at two ends of the supporting portion, and the supporting portion provides height support for the mounting portion.

[0008] Preferably, the follower includes a measuring part, a connecting part and an abutting part, one side of the measuring part faces the sensor, the other side of the measuring part is connected to the connecting part, one end of the connecting part away from the measuring part is connected to the abutting part, the diameter of the abutting part is smaller than the diameter of the connecting part, and the connecting part is connected to the connecting hole.

[0009] Preferably, the connecting hole is a threaded hole, and the connecting portion is provided with an external thread matching the threaded hole.

[0010] Preferably, the fixing hole has the same diameter as the assembly hole of the engine cylinder head.

[0011] Preferably, the fixing member is a C-shaped pin, and the diameter of the fixing member is slightly larger than the diameters of the fixing hole and the assembly hole, so that the fixing member is tightened on the fixing hole and the assembly hole to fix the position of the support plate on the engine cylinder head.

[0012] Preferably, it also includes a valve bridge, which has a limiting hole, the diameter of which is smaller than the diameter of the upper end of the valve stem, and the diameter of which is larger than the diameter of the connecting portion, so that the connecting portion of the follower passes through the limiting hole and is connected to the connecting hole at the upper end of the valve stem.

[0013] The beneficial effects of the utility model are:

[0014] By opening a connecting hole on the valve stem, the follower is directly connected to the valve stem through the connecting hole, avoiding the measurement deviation of the sensor on the follower caused by vibration, thereby greatly improving the measurement accuracy, and even if the valve stem rotates, it will not affect the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model when assembled with the engine cylinder head;

[0016] Figure 2 It is a cross-sectional view of the utility model when assembled with the engine cylinder head;

[0017] Figure 3 It is a structural schematic diagram of the support plate of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the follower of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the fixing member of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the valve bridge of the utility model.

[0021] The markings of the components in the accompanying drawings are as follows:

[0022] 1. Support plate; 11. Fixing hole; 12. Mounting hole; 13. Mounting part; 14. Support part; 15. Fixing part; 2. Fixing piece; 3. Sensor; 4. Connecting hole; 5. Follower; 51. Measuring part; 52. Connecting part; 53. Abutting part; 6. Valve bridge; 61. Limiting hole. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Example:

[0031] refer to Figure 1-Figure 6 A high-precision and fast-disassembly engine sensor bracket comprises: a support plate 1, a fixing hole 11 is provided at one end of the support plate 1, a fixing member 2 for fixing the support plate 1 to the engine cylinder head is detachably installed in the fixing hole 11, a mounting hole 12 is provided at the other end of the support plate 1 toward the valve stem, a sensor 3 is installed in the mounting hole 12, a connecting hole 4 is provided at the upper end of the valve stem, a follower 5 is connected to the connecting hole 4, and the sensor 3 is used to measure the displacement of the follower 5;

[0032] Thus, the follower 5 is directly fixed to the upper end of the valve stem through the connecting hole 4, and the follower 5 can move synchronously with the valve stem directly, thereby avoiding the measurement deviation caused by vibration. The sensor 3 measures the displacement of the follower 5 to obtain the displacement of the valve stem lift, and the measurement will not be affected even if the valve stem rotates.

[0033] refer to Figure 1-Figure 3 The support plate 1 includes a mounting portion 13, a supporting portion 14 and a fixing portion 15. The mounting portion 13, the supporting portion 14 and the fixing portion 15 are integrally formed. The mounting portion 13 and the fixing portion 15 are respectively distributed at both ends of the supporting portion 14. The supporting portion 14 provides height support for the mounting portion 13, thereby providing support for the height and position of the sensor 3.

[0034] refer to Figure 1 , Figure 2 and Figure 4 The follower 5 includes a measuring portion 51, a connecting portion 52 and an abutting portion 53. The measuring portion 51, the connecting portion 52 and the abutting portion 53 can be integrally formed. One side of the measuring portion 51 faces the sensor 3, so that the sensor 3 can measure the follower 5. Then, when the follower 5 moves with the valve stem, the sensor 3 measures the measuring portion 51 of the follower 5 to obtain the movement data of the valve stem. The area of ​​the side of the measuring portion 51 facing the sensor 3 can be appropriately larger, which is more convenient for the sensor 3 to measure. The other side of the measuring portion 51 is connected to the connecting portion 52, and one end of the connecting portion 52 away from the measuring portion 51 is connected to the abutting portion 53. The diameter of the abutting portion 53 is smaller than the diameter of the connecting portion 52. The connecting hole 4 is a threaded hole. The connecting portion 52 is provided with an external thread that matches the threaded hole, so that the connecting portion 52 is threadedly connected to the connecting hole 4. The follower 5 is screwed into the connecting hole 4 of the valve stem through the connecting portion 52 and the connecting hole 4 until the abutting portion 53 of the follower 5 is at the bottom of the connecting hole 4 , so that the thread has a pre-tightening force, and torque is applied to the follower 5 through the measuring portion 51 .

[0035] refer to Figure 1-Figure 5 The fixing hole 11 has the same diameter as the assembly hole of the engine cylinder head. The fixing part 2 is a C-shaped pin. The diameter of the fixing part 2 is slightly larger than the diameters of the fixing hole 11 and the assembly hole, so that the fixing part 2 is tightened on the fixing hole 11 and the assembly hole to fix the position of the support plate 1 on the engine cylinder head. When the fixing part 2 is installed into the fixing hole 11 and the assembly hole on the engine cylinder head by knocking, the fixing part 2 will tighten the fixing hole 11 and the assembly hole at the same time, thereby fixing the support plate 1 on the engine cylinder head. In the process of knocking in the fixing part 2, the friction force will make the fixing part 15 of the support plate 1 close to the plane of the engine cylinder head. When it needs to be removed, the fixing part 2 can be pulled out by using a specific tool.

[0036] refer to Figure 1 , Figure 2 and Figure 6 In order to facilitate the connection between the follower 5 and the valve stem, a valve bridge 6 is also included. The valve bridge 6 is provided with a limiting hole 61. The diameter of the limiting hole 61 is smaller than the diameter of the upper end of the valve stem, so that the valve stem can be pressed. The diameter of the limiting hole 61 is larger than the diameter of the connecting portion 52, so that the connecting portion 52 of the follower 5 passes through the limiting hole 61 and is connected to the connecting hole 4 at the upper end of the valve stem.

[0037] 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 high-precision, quick-disassembly engine sensor bracket, characterized in that: include: A support plate (1), one end of the support plate (1) is provided with a fixing hole (11), the fixing hole (11) is detachably provided with a fixing member (2) for fixing the support plate (1) on an engine cylinder head, the other end of the support plate (1) is provided with a mounting hole (12) facing the valve stem, a sensor (3) is provided in the mounting hole (12), the upper end of the valve stem is provided with a connecting hole (4), a follower (5) is connected to the connecting hole (4), and the sensor (3) is used to measure the displacement of the follower (5).

2. The high-precision, quick-disassembly engine sensor bracket according to claim 1, characterized in that: The support plate (1) comprises a mounting portion (13), a supporting portion (14) and a fixing portion (15); the mounting portion (13) and the fixing portion (15) are respectively distributed at two ends of the supporting portion (14); and the supporting portion (14) provides height support for the mounting portion (13).

3. The high-precision, quick-disassembly engine sensor bracket according to claim 1, characterized in that: The follower (5) comprises a measuring portion (51), a connecting portion (52) and an abutting portion (53); one side of the measuring portion (51) faces the sensor (3); the other side of the measuring portion (51) is connected to the connecting portion (52); one end of the connecting portion (52) away from the measuring portion (51) is connected to the abutting portion (53); the diameter of the abutting portion (53) is smaller than the diameter of the connecting portion (52); and the connecting portion (52) is connected to the connecting hole (4).

4. The high-precision, quick-disassembly engine sensor bracket according to claim 3, characterized in that: The connecting hole (4) is a threaded hole, and the connecting portion (52) is provided with an external thread matching the threaded hole.

5. A high-precision, quick-disassembly engine sensor bracket according to any one of claims 1 to 4, characterized in that: The fixing hole (11) has the same diameter as the assembly hole of the engine cylinder head.

6. The high-precision, quick-disassembly engine sensor bracket according to claim 5, characterized in that: The fixing member (2) is a C-shaped pin, and the diameter of the fixing member (2) is slightly larger than the diameters of the fixing hole (11) and the assembly hole, so that the fixing member (2) is tightened on the fixing hole (11) and the assembly hole to fix the position of the support plate (1) on the engine cylinder head.

7. A high-precision, quick-disassembly engine sensor bracket according to claim 3 or 4, characterized in that: The valve bridge (6) is provided with a limiting hole (61), the diameter of the limiting hole (61) is smaller than the diameter of the upper end of the valve stem, and the diameter of the limiting hole (61) is larger than the diameter of the connecting portion (52), so that the connecting portion (52) of the follower (5) passes through the limiting hole (61) and is connected to the connecting hole (4) at the upper end of the valve stem.

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