Device for measuring aperture of tappet hole

Abstract

The utility model discloses a device for measuring the aperture of a tappet hole. The device comprises a gauge head, a gauge rod, a connecting rod and a plug gauge body. The plug gauge body is cylindrical and is provided with measuring heads which are symmetrically arranged and protrude out of the cylindrical surface of the plug gauge body, and the measuring heads can move in the radial direction of the plug gauge body. The gauge head is provided with a pointer dial plate or a digital display screen, the gauge rod is connected with the gauge head and provided with a holding portion, and the axis of the gauge rod is parallel to the axis of the plug gauge body and staggered in the radial direction of the plug gauge body. The connecting rod is connected with the gauge rod and the plug gauge body, the connecting rod comprises a Z-shaped adapter, two T-shaped transmission pieces located at the corners of the adapter respectively are arranged in the adapter, and the transmission pieces are hinged to the adapter. The device disclosed by the utility model can be used for detecting the aperture of the tappet hole more conveniently and safely, time and labor are saved, and the detection result is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring tools, in particular to a device for measuring the diameter of a tappet hole. Background Art

[0002] As a precision assembly hole in the engine structure, the tappet hole is currently commonly tested by the go / no-go gauge measurement method. From the detection principle of the no-go gauge, this detection method can only determine whether the measured tappet hole diameter is within the specified limit size range, and cannot obtain the specific data of the tappet hole diameter. On the other hand, the go / no-go gauge extends from the top of the engine into the cylinder body to detect the tappet hole diameter, which faces the problem of difficult operation during the detection process. At present, most of them first reverse the engine with a forklift and a hoist, and then detect the tappet hole diameter from the bottom of the engine, which undoubtedly increases the production process, is time-consuming, labor-intensive and has a high risk factor. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a device for measuring the diameter of a tappet hole, which can be used to more conveniently and safely detect the diameter of the tappet hole, save time and effort, and provide more accurate detection results.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A device for measuring the diameter of a tappet hole, comprising:

[0006] The plug gauge body is cylindrical and has a probe symmetrically arranged and protruding from the cylindrical surface of the plug gauge body, and the probe can move along the radial direction of the plug gauge body;

[0007] A meter head having a pointer dial or a digital display;

[0008] A gauge rod connected to the gauge head, the gauge rod having a grip portion, an axis of the gauge rod being parallel to an axis of the plug gauge body and staggered along a radial direction of the plug gauge body;

[0009] A connecting rod connects the gauge rod and the plug gauge body, wherein the connecting rod comprises a Z-shaped adapter, wherein two T-shaped transmission members are arranged inside the adapter and are respectively located at the corners of the adapter, and the transmission member is hinged to the adapter.

[0010] Optionally, in the above device, the connecting rod includes an extension rod, the extension rod is coaxially arranged with the meter rod, one end of the extension rod is connected to the meter rod, and the other end is connected to the adapter.

[0011] Optionally, in the above device, the extension rod is connected to the watch rod via a threaded connection, and / or the extension rod is connected to the adapter via a threaded connection.

[0012] Optionally, in the above device, the adapter is provided with a vent hole communicating with the interior of the adapter.

[0013] Optionally, in the above device, the air vent includes a first hole coaxially arranged with the gauge rod and a second hole coaxially arranged with the plug gauge body.

[0014] Optionally, in the above device, the meter head is detachably connected to the meter stem.

[0015] Optionally, in the above device, the surface of the gripping portion is provided with anti-slip patterns.

[0016] Optionally, in the above device, the adapter is connected to the plug gauge body via threads.

[0017] Optionally, in the above device, both corners of the adapter are right angles.

[0018] Optionally, in the above device, the probe is made of cemented carbide.

[0019] The device for measuring the tappet hole diameter provided by the utility model has the following beneficial effects: due to the provision of a Z-shaped adapter, the device provided by the utility model can detect the tappet hole diameter from the top of the engine cylinder block, eliminating the process of reversing the engine by a forklift and a sling, thereby achieving the purpose of saving time, labor and safety. Since the inspector can read the radial movement distance of the probe along the plug gauge body through the meter head, the specific data of the tappet hole diameter can be calculated based on the basic specification size of the plug gauge body, and the obtained detection result is more accurate compared to the go / no-go gauge measurement method. In summary, the use of the device of the utility model can detect the tappet hole diameter more conveniently and safely, saving time and labor and providing more accurate detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 Schematic diagram of a device for measuring the tappet hole diameter provided by an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Left view of

[0023] Figure 3 yes Figure 1 A partial enlarged view of

[0024] Figure 4 It is a schematic diagram of the engine block.

[0025] The markings in the figure are:

[0026] 1. Gauge head; 2. Gauge rod; 3. Extension rod; 4. Adapter; 41. First hole; 42. Second hole; 5. Plug gauge body; 51. Probe; 6. Transmission part. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1~Figure 3 , an embodiment of the utility model provides a device for measuring the aperture of a tappet hole, comprising a gauge head, a gauge rod 2, a connecting rod and a plug gauge body 5, wherein the plug gauge body 5 is cylindrical, and has a probe 51 symmetrically arranged and protruding from the cylindrical surface of the plug gauge body 5, and the probe 51 can move radially along the plug gauge body 5. The gauge head has a pointer dial or a digital display screen, that is, the gauge head can be mechanical or electronic. The gauge rod 2 is connected to the gauge head, and the gauge rod 2 has a grip portion, which is for the inspector to hold when using the device. The axis of the gauge rod 2 is parallel to the axis of the plug gauge body 5 and is staggered along the radial direction of the plug gauge body 5. The connecting rod connects the gauge rod 2 and the plug gauge body 5, and the connecting rod includes a Z-shaped adapter 4, such as Figure 1 As shown, the distance between the two corners of the adapter 4 corresponds to the distance of the radial offset between the gauge rod 2 and the plug gauge body 5 along the plug gauge body 5. It can be understood that the gauge rod 2 and the plug gauge body 5 are offset radially along the plug gauge body 5 through the Z-shaped adapter 4. The adapter 4 is provided with two T-shaped transmission members 6 located at the corners of the adapter 4, and the transmission member 6 is hinged to the adapter 4. It should be understood that when the probe 51 moves radially inwardly along the plug gauge body 5, it can drive the moving parts inside the device to move, thereby changing the pointer position or displayed numbers of the gauge head, and the change reflects the radial movement distance of the probe 51 along the plug gauge body 5. It should be noted that the conversion of the radial movement of the probe 51 along the plug gauge body 5 into the axial movement of the moving parts along the plug gauge body 5 adopts the existing technology. The specific transmission structure can refer to the structure of the electronic plug gauge in the existing technology, which is not described in detail herein.

[0029] When the inspector uses the device to measure the tappet hole diameter, he holds the gauge rod 2 and puts the plug gauge body 5 into the tappet hole along the axial direction. The probe 51 is squeezed by the inner wall of the tappet hole and moves along the radial direction of the plug gauge body 5, thereby driving the moving parts located on the axis of the plug gauge body 5 to move. Figure 3 As shown, since two T-shaped transmission members 6 are disposed inside the adapter 4 and are located at the corners of the adapter 4, the movement of the moving part on the axis of the plug gauge body 5 is transmitted to the moving part on the axis of the gauge stem 2. It should be understood that a moving part that can move inside the adapter 4 is abutted between the two transmission members 6, for example, Figure 3 The movable pin (not marked in the figure) shown is located between the two transmission members 6. When the transmission member 6 on the left side rotates clockwise, it drives the movable pin to move rightward, and then drives the transmission member 6 on the right side to rotate counterclockwise, thereby transmitting the movement of the moving part on the axis of the plug gauge body 5 to the moving part located on the axis of the gauge stem 2.

[0030] like Figure 4 As shown at A in the figure, at the top of the engine cylinder block, the hole for the push rod connected to the push rod to pass through is a gourd-shaped hole opened on the assembly plane of the cylinder head. Two push rods (not shown in the figure) parallel to each other pass through here. It should be understood that the push rod hole is located inside the cylinder block, so Figure 4 The tappet is installed in the tappet hole and connected to the lower end of the push rod. It is used to transmit the thrust of the camshaft to the push rod. If the tappet hole diameter is tested from the top of the engine block, the testing tool needs to be moved from Figure 4 The gourd-shaped hole corresponding to the tappet hole in the cylinder body is inserted into the cylinder body. However, when observing the tappet hole from the gourd-shaped hole along the axial direction of the push rod, part of the sight will be blocked by some protruding structures on the inner surface of the cylinder body. Therefore, the traditional detection tools are all straight rod-shaped, so the detection process is difficult to operate. Since the device provided by the utility model is provided with a Z-shaped adapter 4, it can make the plug gauge body 5 avoid the protruding structure on the inner surface of the cylinder body by rotating the gauge rod 2 and other operations during the insertion process, and finally put the plug gauge body 5 into the tappet hole. Since the device provided by the utility model can detect the tappet hole diameter from the top of the engine cylinder body, the process of reversing the engine by forklift and sling is omitted, achieving the purpose of saving time and labor and being safer. Since the inspector can read the radial movement distance of the probe 51 along the plug gauge body 5 through the gauge head, the specific data of the tappet hole diameter can be calculated based on the basic specification size of the plug gauge body 5 (i.e., the initial distance between the end points of the two probes 51). Compared with the go-no-go gauge measurement method, the obtained detection result is more accurate. In summary, the use of the device of the utility model can detect the diameter of the tappet hole more conveniently and safely, saving time and effort and providing more accurate detection results.

[0031] like Figure 1 and Figure 2 As shown, in a preferred embodiment, the connecting rod includes an extension rod 3, the extension rod 3 is coaxially arranged with the meter rod 2, one end of the extension rod 3 is connected to the meter rod 2, and the other end is connected to the adapter 4. When the engine cylinder body is of different sizes, the distance from the tappet hole to the top of the cylinder body may be different. By selecting an extension rod 3 of a suitable length, the above different situations can be adapted. In order to facilitate the disassembly and replacement of the extension rod 3, the meter rod 2 and the adapter 4 can be connected to the extension rod 3 by threads.

[0032] like Figure 3 As shown, in a preferred embodiment, the adapter 4 is provided with an air vent connected to the inside of the adapter 4. The air vent can prevent air from accumulating inside the adapter 4, so that the movement of the moving parts inside the adapter 4 is subject to less air resistance. Specifically, the air vent can include a first hole 41 coaxially arranged with the gauge stem 2 and a second hole 42 coaxially arranged with the plug gauge body 5.

[0033] like Figure 1 and Figure 2 As shown, in a preferred embodiment, both corners of the adapter 4 are right angles. The adapter 4 and the plug gauge body 5 can be arranged to be connected by threads, so that adapters 4 of different specifications can be quickly replaced, so that the gauge rod 2 and the plug gauge body 5 can obtain different offset distances. The gauge head and the gauge rod 2 can be arranged to be detachably connected, so that different gauge heads can be easily replaced. The surface of the grip portion can be provided with anti-slip grooves to increase the friction between the inspector's hand and the gauge rod 2, so that the inspector can operate the device more reliably. The probe 51 is generally made of cemented carbide. The cemented carbide probe 51 has excellent wear resistance and stability in detection under normal temperature conditions, and is not affected by external environmental factors.

[0034] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for measuring the diameter of a tappet hole, characterized in that: include: The plug gauge body (5) is cylindrical and has a probe (51) symmetrically arranged and protruding from the cylindrical surface of the plug gauge body (5), wherein the probe (51) is movable in the radial direction of the plug gauge body (5); A meter head (1) having a pointer dial or a digital display; A gauge stem (2) connected to the gauge head (1), the gauge stem (2) having a grip portion, an axis of the gauge stem (2) being parallel to an axis of the plug gauge body (5) and being staggered along a radial direction of the plug gauge body (5); A connecting rod connects the gauge rod (2) and the plug gauge body (5), the connecting rod comprising a Z-shaped adapter (4), the adapter (4) having two T-shaped transmission members (6) disposed inside the adapter (4) and located at the corners of the adapter (4), the transmission member (6) being hinged to the adapter (4).

2. The device according to claim 1, characterized in that The connecting rod comprises an extension rod (3), the extension rod (3) being coaxially arranged with the meter rod (2), one end of the extension rod (3) being connected to the meter rod (2), and the other end of the extension rod (3) being connected to the adapter (4).

3. The device according to claim 2, characterized in that The extension rod (3) is connected to the meter rod (2) via a threaded connection, and / or the extension rod (3) is connected to the adapter (4) via a threaded connection.

4. The device according to claim 1, characterized in that The adapter (4) is provided with a vent hole which is in communication with the interior of the adapter (4).

5. The device according to claim 4, characterized in that The vent hole comprises a first hole (41) coaxially arranged with the gauge rod (2) and a second hole (42) coaxially arranged with the plug gauge body (5).

6. The device according to claim 1, characterized in that The meter head (1) and the meter stem (2) are detachably connected.

7. The device according to claim 1, characterized in that The surface of the gripping portion is provided with anti-slip patterns.

8. The device according to claim 1, characterized in that The adapter (4) is connected to the plug gauge body (5) via threads.

9. The device according to any one of claims 1 to 8, characterized in that: The two corners of the adapter (4) are both right-angled.

10. The device according to claim 9, characterized in that The measuring head (51) is made of hard alloy.

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