Installation gap measuring device and method for cylinder cover seat ring bottom hole

Abstract

The invention provides an installation gap measuring device and method for a cylinder cover seat ring bottom hole, a valve body is in a shape with an inner cavity and two open ends, one end of the valve body is fixedly connected with a dial indicator, and the other end of the valve body is a free end and is provided with an annular conical surface in contact with the cylinder cover seat ring bottom hole; a movable valve element is arranged in the valve body, the valve element extends out of the free end of the valve body and is provided with an annular edge protrusion used for making contact with a cylinder cover seat ring bottom hole, the outer diameter of the annular edge protrusion is larger than the inner diameter of the annular conical surface, and when the annular conical surface makes contact with the cylinder cover seat ring bottom hole, the valve element can make a measuring head of the dial indicator generate corresponding displacement. According to the installation gap measuring device and method for the cylinder cover seat ring bottom hole, numeralization measurement of the installation gap is achieved through reading of the dial indicator, the actual situation of the installation gap is displayed in an amplified mode, a user can observe the installation gap conveniently, and the installation gap measuring device and method have the advantages of being accurate in installation gap measurement and reliable in performance.

Description

Technical Field

[0001] The invention belongs to the field of numerical control machining, and in particular relates to a device and method for measuring the installation clearance of a bottom hole of a cylinder cover seat ring. Background Art

[0002] When the cylinder head seat ring is press-fitted, a gap will appear between the seat ring and the bottom hole of the cylinder head seat ring. How to measure this installation gap has become a problem that must be solved. Under existing technical conditions, a go / no-go gauge is generally used to measure the installation gap. The measuring tool used is a qualified seat ring. However, the qualified seat ring itself has tolerances, which increases the measurement error. At the same time, the go / no-go gauge can only measure the gap range but not the specific value, which brings difficulties to the subsequent quality analysis. Summary of the invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a device and method for measuring the installation clearance of the bottom hole of a cylinder head seat ring.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] In the first aspect, the present invention discloses an installation clearance measuring device for a bottom hole of a cylinder head seat ring, comprising: a dial indicator and a valve body; the valve body is an internal cavity with openings at both ends, one end of the valve body is fixedly connected to the dial indicator, and the other end of the valve body is a free end and is provided with a circular cone surface for contacting the bottom hole of the cylinder head seat ring; a movable valve core is provided in the valve body, the valve core extends out of the free end of the valve body and is provided with a circular edge protrusion for contacting the bottom hole of the cylinder head seat ring, the outer diameter of the circular edge protrusion is larger than the inner diameter of the circular cone surface, and when the circular cone surface contacts the bottom hole of the cylinder head seat ring, the valve core can cause the measuring head of the dial indicator to produce a corresponding displacement.

[0006] In some embodiments of the present invention, the valve body is tubular in shape, the valve core is cylindrical in shape, and the valve core is movable in the axial direction of the valve body.

[0007] In some embodiments of the present invention, the dial indicator and the valve body are respectively connected to a fixed structure, and the fixed structure is used to define the relative position of the dial indicator and the valve body.

[0008] In some embodiments of the present invention, the fixed structure includes a first connecting member and a second connecting member; the second connecting member is threadedly connected to the outer surface of one end of the valve body away from the circular cone surface, the first connecting member is threadedly connected to the outer surface of the second connecting member, and the dial indicator is fixedly connected to the first connecting member.

[0009] In some embodiments of the present invention, a spring is provided between the second connecting member and the valve core, and the spring can apply a restoring elastic force when the valve core moves.

[0010] In some embodiments of the present invention, the first screw is fixed to the protruding end of the valve core away from the annular edge, and the measuring head is arranged in the moving direction of the first screw driven by the valve core.

[0011] In some embodiments of the present invention, the first screw passes through the gasket and is fixedly connected to the valve core, and the second connecting member is provided with a step for limiting the maximum movement position of the gasket.

[0012] In some embodiments of the present invention, the first connecting member is fixedly connected to the dial indicator via a second screw.

[0013] In some embodiments of the present invention, a through hole is provided on the first connecting member, and a fixing rod of the dial indicator is inserted into the through hole.

[0014] In a second aspect, the present invention discloses a method for measuring the installation clearance of a bottom hole of a cylinder head seat ring, using the above-mentioned installation clearance measuring device for the bottom hole of a cylinder head seat ring, comprising:

[0015] Place the installation clearance measuring device for the bottom hole of the cylinder head seat ring on a horizontal surface so that the annular edge protrusion fits with the lower end surface of the annular cone surface;

[0016] When the annular edge protrusion fits with the annular conical surface, turn the dial indicator to reset the pointer reading of the dial indicator to zero, and the calibration of the installation clearance measuring device for the bottom hole of the cylinder head seat ring is completed;

[0017] Place the calibrated installation clearance measuring device for the cylinder head seat ring bottom hole into the cylinder head seat ring bottom hole that needs to be measured, so that the annular cone surface of the valve body fits tightly with the inner wall of the cylinder head seat ring bottom hole that needs to be measured, read the reading of the dial indicator at this time, and complete the installation clearance measurement of the cylinder head seat ring bottom hole.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The present invention discloses a device and method for measuring the installation clearance of a cylinder head seat ring bottom hole. The contact between the annular cone surface and the cylinder head seat ring bottom hole is achieved through the mutual cooperation between the valve body and the valve core. The extrusion of the annular edge protrusion by the valve core according to the installation clearance is further transmitted to the measuring head of the dial indicator. The installation clearance is numerically measured through the reading of the dial indicator, and the actual situation of the installation clearance is magnified and displayed, which is convenient for users to observe. The device and method have the characteristics of accurate installation clearance measurement and reliable performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0021] In the attached picture:

[0022] Figure 1 This is a schematic structural diagram of a mounting clearance measuring device for a bottom hole of a cylinder head seat ring according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of a second connecting piece of a mounting clearance measuring device for a bottom hole of a cylinder head seat ring according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a first connecting piece of a mounting clearance measuring device for a bottom hole of a cylinder head seat ring according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of a valve body of a mounting clearance measuring device for a bottom hole of a cylinder head seat ring according to an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of a valve core of a mounting clearance measuring device for a bottom hole of a cylinder head seat ring according to an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of a gasket for measuring the installation gap of a bottom hole of a cylinder head seat ring according to an embodiment of the present invention;

[0028] Figure 7 The present invention is a schematic diagram of a method for measuring the installation clearance of a cylinder head seat bottom hole according to an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 1- dial indicator; 11- measuring head; 2- first connecting piece; 3- second connecting piece; 4- valve body; 41- circular cone surface; 5- valve core; 51- circular edge protrusion; 6- gasket; 7- first screw; 8- spring; 9- second screw. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are 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 device or element referred to 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.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0034] In the description of the present invention, it should be further explained that the terms "first", "second", etc. 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. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0035] Under existing technical conditions, a go / no-go gauge is generally used to measure the installation clearance between the seat ring and the bottom hole of the cylinder head seat ring. The measuring tool used is a qualified seat ring, but the qualified seat ring itself has tolerances, which increases the measurement error. At the same time, the go / no-go gauge can only measure the clearance range but not the specific value, which brings difficulties to the subsequent quality analysis.

[0036] like Figures 1 to 6 As shown, the present invention realizes the contact between the annular cone surface 41 and the bottom hole of the cylinder head seat ring through the mutual cooperation between the valve body 4 and the valve core 5. The valve core 5 further transmits the squeezing condition of the annular edge protrusion 51 according to the installation clearance to the measuring head 11 of the dial gauge 1, and the numerical measurement of the installation clearance is realized through the reading of the dial gauge 1.

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0038] In one embodiment of the present invention, Figures 1 to 6 As shown, a device for measuring the installation clearance of the bottom hole of the cylinder head seat ring comprises: a dial indicator 1 and a valve body 4; the valve body 4 is an internal cavity with openings at both ends, one end of the valve body 4 is fixedly connected to the dial indicator 1, and the other end of the valve body 4 is a free end and is provided with a circular cone surface 41 for contacting the bottom hole of the cylinder head seat ring; a movable valve core 5 is provided in the valve body 4, the valve core 5 extends out of the free end of the valve body 4 and is provided with a circular edge protrusion 51 for contacting the bottom hole of the cylinder head seat ring, the outer diameter of the circular edge protrusion 51 is larger than the inner diameter of the circular cone surface 41, and when the circular cone surface 41 contacts the bottom hole of the cylinder head seat ring, the valve core 5 can cause the measuring head 11 of the dial indicator 1 to produce a corresponding displacement.

[0039] The outer diameter of the annular edge protrusion 51 is greater than the inner diameter of the annular conical surface 41 , thereby ensuring that the annular edge protrusion 51 cannot be retracted into the interior of the valve body 4 .

[0040] In practical application, the present invention is first placed in the bottom hole of the cylinder head seat ring to be measured, so that the annular conical surface 41 of the valve body 4 is tightly fitted with the bottom hole of the cylinder head seat ring to be measured. At this time, the annular conical surface 41 of the valve body 4 is used to simulate the cylinder head seat ring. Since the annular edge protrusion 51 of the valve core 5 is arranged below the annular conical surface 41, that is, it is arranged in the installation gap between the bottom hole of the cylinder head seat ring and the annular conical surface 41, the size of the installation gap determines the downward displacement of the annular edge protrusion 51, that is, the downward displacement of the valve core 5. Since the top of the valve core 5 conflicts with the measuring head 11 of the dial gauge 1, the measuring head 11 of the dial gauge 1 also moves downward to the corresponding position at this time, and the dial gauge 1 displays a reading corresponding to the size of the installation gap.

[0041] In this embodiment, because in actual situations, the installation clearance between the cylinder head seat ring and the bottom hole of the cylinder head seat ring is very small, the common go / no-go gauge cannot measure the corresponding reading when measuring the installation clearance, which is very inconvenient for subsequent quality analysis of the installation clearance. The present invention innovatively uses a dial gauge 1, and through the mutual cooperation of the valve body 4 and the valve core 5, the installation clearance between the cylinder head seat ring and the bottom hole of the cylinder head seat ring is converted into the reading of the dial gauge 1. With the help of the characteristics of the dial gauge 1, the enlarged display of the installation clearance size is realized, which is very suitable for technicians to understand the size of the installation clearance and facilitate quality improvement in the later stage.

[0042] For example, when the measuring head 11 moves downward by 0.4 mm, the dial indicator 1 swings 40 small grids accordingly.

[0043] In another embodiment of the present invention, Figure 4 and Figure 5 As shown, the valve body 4 is tubular in shape, the valve core 5 is cylindrical in shape, and the valve core 5 can move along the axial direction of the valve body 4 .

[0044] In another embodiment of the present invention, Figure 1 As shown, the dial gauge 1 and the valve body 4 are respectively connected to the fixed structure, and the fixed structure is used to limit the relative position of the dial gauge 1 and the valve body 4.

[0045] In this embodiment, if Figure 1 As shown, the fixed structure includes a first connecting member 2 and a second connecting member 3; the second connecting member 3 is threadedly connected to the outer surface of the end of the valve body 4 away from the circular cone surface 41, the first connecting member 2 is threadedly connected to the outer surface of the second connecting member 3, and the dial indicator 1 is fixedly connected to the first connecting member 2.

[0046] In this embodiment, if Figure 1As shown, a spring 8 is provided between the second connecting member 3 and the valve core 5 , and the spring 8 can exert a restoring elastic force when the valve core 5 moves.

[0047] In another embodiment of the present invention, Figure 1 and Figure 5 As shown, the first screw 7 is fixed to the end of the valve core 5 away from the annular edge protrusion 51 , and the measuring head 11 is arranged in the moving direction of the first screw 7 driven by the valve core 5 .

[0048] In this embodiment, if Figure 1 As shown, the first screw 7 passes through the gasket 6 and is fixedly connected to the valve core 5 , and the second connecting member 3 is provided with a step for limiting the maximum movement position of the gasket 6 .

[0049] In this embodiment, the spring 8 is sleeved on the upper part of the valve core 5 , and the valve core 5 is provided with a step for contacting one end of the spring 8 , and the other end of the spring 8 contacts the step on the second connecting member 3 .

[0050] The spring 8 is used to make the annular edge protrusion 51 of the valve core 5 closely contact with the bottom hole of the cylinder head seat ring, so as to achieve accurate measurement of the installation gap.

[0051] In this embodiment, if Figure 1 As shown, the first connecting member 2 is fixedly connected to the dial indicator 1 via a second screw 9 .

[0052] In this embodiment, if Figure 1 As shown, the first connecting member 2 is provided with a through hole, and the fixing rod of the dial indicator 1 is inserted into the through hole.

[0053] like Figures 1 to 6 As shown, the assembly process of the installation clearance measuring device for the bottom hole of the cylinder head seat ring is as follows:

[0054] First, the valve core 5 is inserted into the valve body 4;

[0055] Second, insert the spring 8;

[0056] Third, thread the second connecting member 3 onto the valve body 4;

[0057] Fourth, the first screw 7 is passed through the gasket 6 and fixedly connected to the valve core 5. At this time, the valve core 5 is pressed to achieve a rebound effect caused by the spring 8.

[0058] Fifth, the first connecting member 2 is threadedly connected to the second connecting member 3;

[0059] Sixth, the dial gauge 1 is inserted into the first connecting member 2, so that the measuring head 11 is in conflict with the first screw 7 on the valve core 5, and the dial gauge 1 is fixed with the second screw 9 to complete the assembly.

[0060] like Figures 1 to 7As shown, the present invention discloses a method for measuring the installation clearance of the bottom hole of a cylinder head seat ring, using the above-mentioned installation clearance measuring device for the bottom hole of the cylinder head seat ring, comprising:

[0061] Step S101, placing the installation clearance measuring device for the bottom hole of the cylinder head seat ring on a horizontal surface, so that the annular edge protrusion 51 is in contact with the lower end surface of the annular conical surface 41;

[0062] Step S102, when the annular edge protrusion 51 is in contact with the annular conical surface 41, the dial gauge 1 is rotated to reset the pointer reading of the dial gauge 1 to complete the calibration of the installation clearance measuring device for the bottom hole of the cylinder head seat ring;

[0063] Step S103, place the calibrated installation clearance measuring device for the cylinder head seat ring bottom hole into the cylinder head seat ring bottom hole to be measured, so that the annular cone surface 41 of the valve body 4 is tightly fitted with the inner wall of the cylinder head seat ring bottom hole to be measured, read the reading of the dial indicator 1 at this time, and complete the installation clearance measurement of the cylinder head seat ring bottom hole.

[0064] In this embodiment, the thickness of the annular edge protrusion 51 is 0.5 mm, so the reading of the dial indicator 1 needs to be added with the thickness of the annular edge protrusion 51 to obtain the actual installation clearance value of the bottom hole of the cylinder head seat ring.

[0065] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although the embodiments are described above, this does not mean that the measures in the various embodiments cannot be used in combination. The scope of the present invention is limited by the attached claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A device for measuring the installation clearance of a cylinder head seat bottom hole, characterized in that: include: A dial gauge (1) and a valve body (4); the valve body (4) is an internal cavity with two openings at both ends, one end of the valve body (4) is fixedly connected to the dial gauge (1), and the other end of the valve body (4) is a free end and is provided with a circular cone surface (41) for contacting the bottom hole of the cylinder head seat ring; a movable valve core (5) is provided in the valve body (4), the valve core (5) extends out of the free end of the valve body (4) and is provided with a circular edge protrusion (51) for contacting the bottom hole of the cylinder head seat ring, the outer diameter of the circular edge protrusion (51) is larger than the inner diameter of the circular cone surface (41), and when the circular cone surface (41) contacts the bottom hole of the cylinder head seat ring, the valve core (5) can cause the measuring head (11) of the dial gauge (1) to produce a corresponding displacement.

2. The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to claim 1, characterized in that: The valve body (4) is tubular in shape, the valve core (5) is cylindrical in shape, and the valve core (5) is movable in the axial direction of the valve body (4).

3. The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to claim 2, characterized in that: The dial gauge (1) and the valve body (4) are respectively connected to a fixed structure, and the fixed structure is used to limit the relative position of the dial gauge (1) and the valve body (4).

4. The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to claim 3, characterized in that: The fixing structure comprises a first connecting member (2) and a second connecting member (3); the second connecting member (3) is threadedly connected to the outer surface of the valve body (4) at one end away from the circular conical surface (41), the first connecting member (2) is threadedly connected to the outer surface of the second connecting member (3), and the dial indicator (1) is fixedly connected to the first connecting member (2).

5. The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to claim 4, characterized in that: A spring (8) is provided between the second connecting member (3) and the valve core (5), and the spring (8) is capable of applying a restoring elastic force when the valve core (5) moves.

6. The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to claim 4, characterized in that: The first screw (7) is fixed to an end of the valve core (5) away from the annular edge protrusion (51), and the measuring head (11) is arranged in the moving direction of the first screw (7) driven by the valve core (5).

7. The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to claim 6, characterized in that: The first screw (7) passes through the gasket (6) and is fixedly connected to the valve core (5), and the second connecting member (3) is provided with a step for limiting the maximum movement position of the gasket (6).

8. The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to claim 4, characterized in that: The first connecting member (2) is fixedly connected to the dial indicator (1) via a second screw (9).

9. The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to claim 4, characterized in that: The first connecting member (2) is provided with a through hole, and the fixing rod of the dial gauge (1) is inserted into the through hole.

10. A method for measuring the installation clearance of a cylinder head seat bottom hole, characterized in that: The installation clearance measuring device for the bottom hole of a cylinder head seat ring according to any one of claims 1 to 9 comprises: Placing the installation clearance measuring device for the bottom hole of the cylinder head seat ring on a horizontal surface so that the annular edge protrusion (51) fits the lower end surface of the annular conical surface (41); After the annular edge protrusion (51) is in contact with the annular conical surface (41), the dial gauge (1) is rotated to reset the pointer reading of the dial gauge (1) to zero, thereby completing the calibration of the installation clearance measuring device for the bottom hole of the cylinder head seat ring; The calibrated installation clearance measuring device for the cylinder head seat ring bottom hole is placed in the cylinder head seat ring bottom hole to be measured, so that the annular conical surface (41) of the valve body (4) is tightly fitted with the inner wall of the cylinder head seat ring bottom hole to be measured, and the reading of the dial indicator (1) is read at this time to complete the installation clearance measurement of the cylinder head seat ring bottom hole.

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