Crankshaft center distance measuring device

Abstract

The present invention discloses a crankshaft center distance measuring device. This scheme includes a calibration component and a measuring component. The measuring component is constructed into a calibration state and a measuring state. When the measuring component is in the calibration state, the upper end face support component is adjusted to fit with the calibration upper end face, and the front end face support component is adjusted to fit with the calibration front end face, the measuring component is embedded in the calibration spindle hole, and the measuring component can be reset to zero; when the measuring component is in the measuring state, the upper end face support component fits with the upper end face of the cylinder body, the front end face support component fits with the front end face of the cylinder body, the measuring component is adjusted to be embedded in the spindle hole of the cylinder body, and the actual crankshaft center distance can be obtained. When measuring, the crankshaft center distance measuring device of the present application operates the measuring component to the calibration state, and after the calibration of the measuring component is completed, the calibration of the verticality of the calibration upper end face, the front end face, etc. is completed, and then the result of measuring the cylinder body is more accurate. Compared with the prior art, the accuracy of the crankshaft center distance measurement is improved.

Description

Technical Field

[0001] The invention relates to the technical field of engine measurement, and in particular to a crankshaft center distance measuring device. Background Art

[0002] Crankshaft center distance measurement is an important part of mechanical engineering, which ensures the correct installation of cylinder components and the stable operation of the cylinder. Non-horizontal or non-vertical installation of the cylinder block may cause measurement errors.

[0003] Therefore, how to improve the measurement accuracy of the crankshaft center distance has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0004] The invention provides a crankshaft center distance measuring device to improve the measurement accuracy of the crankshaft center distance.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a crankshaft center distance measuring device for measuring the crankshaft center distance of a cylinder body, comprising a calibration component and a measuring component, wherein:

[0007] The calibration component comprises a calibration upper end face, a calibration front end face and a calibration spindle hole. The calibration upper end face is parallel to the center line of the calibration spindle hole. The calibration front end face is perpendicular to the center line of the calibration spindle hole and the calibration upper end face. The distance between the center line of the calibration spindle hole and the calibration upper end face is equal to the center distance of the standard crankshaft.

[0008] The measuring assembly comprises a support frame, an upper end surface supporting component, a front end surface supporting component and a measuring component, wherein the upper end surface supporting component is arranged at the first end of the support frame; the front end surface supporting component is arranged at the side of the support frame; and the measuring component is arranged at the second end of the support frame;

[0009] The measuring component is constructed into a calibration state and a measuring state. When the measuring component is in the calibration state, the upper end face support component is adjusted to fit with the calibration upper end face, and the front end face support component is adjusted to fit with the calibration front end face, the measuring component is embedded in the calibration spindle hole, and the measuring component can be reset to zero; when the measuring component is in the measuring state, the upper end face support component fits with the upper end face of the cylinder body, and the front end face support component fits with the front end face of the cylinder body, the measuring component is adjusted to be embedded in the spindle hole of the cylinder body, and the actual crankshaft center distance can be obtained.

[0010] In some embodiments, the calibration assembly includes a calibration bracket and a calibration support plate, the calibration support plate is disposed on the calibration bracket, and one end of the calibration support plate forms a calibration upper end surface, a portion of the plate surface or the entire plate surface of the calibration support plate forms a calibration front end surface, and the calibration spindle hole passes through the calibration spindle hole.

[0011] In some embodiments, the calibration assembly further includes a calibration beam disposed on the calibration support plate to form a calibration front end surface.

[0012] In some embodiments, the calibration assembly further includes an auxiliary support plate, which is detachably disposed on a plate surface of the calibration support plate to fit with a side surface of the support frame.

[0013] In some embodiments, the calibration assembly further includes a calibration handle, which is disposed on the calibration bracket and / or the calibration support plate.

[0014] In some embodiments, the upper end surface support component includes an upper end surface support plate and an upper end surface support block, the upper end surface support plate is located at the first end of the support frame, and the board surface of the upper end surface support plate is perpendicular to the board surface of the support frame; the upper end surface support block is detachably arranged on the upper end surface support plate, and the relative height of the upper end surface support block relative to the board surface of the upper end surface support plate is adjustable.

[0015] In some embodiments, the front end face support component includes a front end face support plate and a front end face support block, the front end face support plate is located on the side of the support frame, and the plate surface of the front end face support plate is parallel to the plate surface of the support frame; the front end face support block is detachably arranged on the front end face support plate, and the relative height of the front end face support block relative to the plate surface of the front end face support plate is adjustable.

[0016] In some embodiments, the number of the front end surface support components is an even number, and they are symmetrically arranged on both sides of the support frame.

[0017] In some embodiments, the measuring component includes a first measuring head, a second measuring head, a spindle hole alignment head and a micrometer. The first measuring head, the spindle hole alignment head and the second measuring head are arranged in sequence along the center line of the support frame, and the first measuring head and the second measuring head are movable in the direction of the center line of the support frame; the spindle hole alignment head is installed on the support frame, and a first elastic member is provided between the spindle hole alignment head and the first measuring head, and a second elastic member is provided between the spindle hole alignment head and the second measuring head; the head of the micrometer is arranged on the first measuring head, and the impact head of the micrometer is arranged on the second measuring head.

[0018] In some embodiments, the first measuring head includes a first measuring frame, a first elastic wrapping member and a first measuring block, wherein the first measuring frame passes through a first guide groove of a support frame and is movable relative to the support frame; the first measuring block is arranged on a side of the first measuring frame opposite to the first measuring head; the first elastic wrapping member is arranged on a side of the first measuring frame opposite to the second measuring head, and the first measuring block is exposed; and the head of the micrometer is fixed to the second end of the first measuring frame.

[0019] In some embodiments, the second measuring head includes a second measuring frame, a second elastic wrapping member and a second measuring block, wherein the second measuring frame passes through the second guide groove of the support frame and is movable relative to the support frame; the second measuring block is arranged on the side of the second measuring frame opposite to the first measuring head; the second elastic wrapping member is arranged on the side of the second measuring frame opposite to the first measuring head, and the second measuring block is exposed; and the impact head of the micrometer is fixed to the second end of the second measuring frame.

[0020] In some embodiments, the second measuring head further includes a measuring handle, and the measuring handle is disposed to wrap around the second end of the second measuring frame.

[0021] In some embodiments, the spindle hole alignment head includes a tapered sleeve, a flange guide sleeve, an intermediate shaft, a limiting block and a third elastic member, wherein the tapered sleeve is adjustably arranged on the outer periphery of the flange guide sleeve, and the tapered sleeve has a large end and a small end, and the large end is tapered to fit with the hole wall of the spindle hole; the flange guide sleeve is installed on the support frame; the intermediate shaft passes through the flange guide sleeve and the tapered sleeve; the limiting block is arranged at one end of the intermediate shaft exposed from the flange guide sleeve; the third elastic member is sleeved on the intermediate shaft and abuts against the tapered sleeve.

[0022] When measuring, the crankshaft center distance measuring device of the present application operates the measuring component to the calibration state, and after the measuring component is calibrated, the verticality of the upper end face, the front end face, etc. is calibrated, and then the result of measuring the cylinder body is more accurate. Compared with the prior art, the accuracy of the crankshaft center distance measurement is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples or embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the present invention can also be applied to other similar scenarios based on the provided drawings. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0024] Figure 1 A schematic diagram of the structure of a cylinder provided by an embodiment of the present invention;

[0025] Figure 2 A front perspective view of a crankshaft center distance measuring device provided by an embodiment of the present invention;

[0026] Figure 3 A rear perspective view of a crankshaft center distance measuring device provided by an embodiment of the present invention;

[0027] Figure 4A schematic diagram of a crankshaft center distance measuring device provided by an embodiment of the present invention in a calibration state;

[0028] Figure 5 A schematic diagram of a crankshaft center distance measuring device provided by an embodiment of the present invention in a measuring state;

[0029] Figure 6 A front perspective view of a calibration assembly provided by an embodiment of the present invention;

[0030] Figure 7 A rear perspective view of a calibration assembly provided by an embodiment of the present invention;

[0031] Figure 8 A front perspective view of a measuring assembly provided by an embodiment of the present invention;

[0032] Fig. 9 A front view of a measuring assembly provided by an embodiment of the present invention;

[0033] Fig.10 A front perspective view of a measuring assembly provided by an embodiment of the present invention;

[0034] Fig.11 for Fig.10 Sectional view of the middle BB section;

[0035] Fig.12 for Fig.11 Enlarged view of part C;

[0036] Fig.13 for Fig.11 A magnified view of part D in the middle;

[0037] Fig.14 A three-dimensional diagram of a spindle hole alignment head provided by an embodiment of the present invention;

[0038] Fig.15 A front view of a spindle hole alignment head provided by an embodiment of the present invention;

[0039] Fig.16 for Fig.15 Enlarged view of part E in the middle;

[0040] Fig.17 for Fig.15 Cross-sectional view of the FF section;

[0041] Fig.18 A side view of a spindle hole alignment head provided by an embodiment of the present invention;

[0042] Fig.19 for Fig.18 Sectional view of section GG;

[0043] In the figure, 10-cylinder block, 20-crankshaft center distance measuring device;

[0044] 100-calibration component, 200-measurement component;

[0045] 110 - calibration front end face, 120 - calibration upper end face, 130 - calibration spindle hole, 140 - calibration bracket, 150 - auxiliary support plate, 160 - calibration beam, 170 - calibration handle;

[0046] 111 - first calibration support plate, 112 - first mounting hole, 113 - second mounting hole;

[0047] 141 - first support rod, 142 - second support rod, 143 - third support rod, 144 - support foot;

[0048] 210-support frame, 220-front end surface support component, 230-upper end surface support component, 240-measuring component;

[0049] 211-support frame, 212-third mounting hole; 213-slide groove, 214-weight reduction hole, 215-first guide groove, 216-second guide groove;

[0050] 221-front end face support plate, 222-front end face support block, 223-front end fastener;

[0051] 221a-front end surface supporting plate, 221b-front end surface connecting seat, 221c-front end adjustment hole, 221d-slider;

[0052] 231-upper end surface support plate, 232-upper end surface support block, 2311-upper end adjustment hole;

[0053] 241-first measuring head, 242-second measuring head, 243-spindle hole alignment head, 244-micrometer, 245-first elastic member, 246-second elastic member;

[0054] 241a-first measuring frame, 241b-first elastic wrapping member, 241c-first measuring block, 241d-first fastener;

[0055] 242a - second measuring frame, 242b - second elastic wrapping member, 242c - second measuring block, 242d - measuring handle, 242e - second fastener;

[0056] 243a-flange guide sleeve, 243b-taper sleeve, 243c-limiting block, 243d-intermediate shaft, 243e-third elastic member, 243b1-big end, 243b2-taper;

[0057] 244a-meter head, 244b-measuring rod, 244c-impact head. DETAILED DESCRIPTION

[0058] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0059] Cylinder crankshaft: The most important component in the engine, it bears the force transmitted by the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine to work.

[0060] Crankshaft center distance: refers to the vertical distance from the center line of the cylinder crankshaft to the upper end surface of the cylinder. It is a key dimension in engine design. The accuracy of its dimensional measurement is related to the overall performance of the engine and directly affects the power of the engine.

[0061] See also Figure 1 , the figure shows a schematic diagram of the structure of the cylinder block, in which the crankshaft center distance L is the vertical distance from the center line O of the cylinder crankshaft (the center line of the main shaft hole A2) to the upper end surface A1 of the cylinder block.

[0062] In order to improve the measurement accuracy of the crankshaft center distance, a crankshaft center distance measuring device is provided in an embodiment of the present application for measuring the crankshaft center distance of a cylinder block.

[0063] See also Figure 2 and Figure 3 As shown, the crankshaft center distance measuring device 20 (hereinafter referred to as the measuring device 20) may include a calibration component 100 and a measuring component 200, wherein: the calibration component 100 has a calibration front end face 110, a calibration upper end face 120 and a calibration spindle hole 130, the calibration upper end face 120 is parallel to the center line of the calibration spindle hole 130, the calibration front end face 110 is perpendicular to the center line of the calibration spindle hole 130 and the calibration upper end face 120; the distance between the center line of the calibration spindle hole 130 and the calibration upper end face 120 is equal to the standard crankshaft center distance.

[0064] The measuring assembly 200 includes a support frame 210, a front end face support component 220, an upper end face support component 230 and a measuring component 240, wherein the upper end face support component 230 is arranged at the first end of the support frame 210; the front end face support component 220 is arranged on the side of the support frame 210; and the measuring component 240 is arranged at the second end of the support frame 210.

[0065] The measuring component 200 is constructed into a calibration state and a measuring state. When the measuring component 200 is in the calibration state, the upper end face support component 230 is adjusted to fit the calibration upper end face 120, and the front end face support component 220 is adjusted to fit the calibration front end face 110, the measuring component 240 is embedded in the calibration spindle hole 130, and the measuring component 240 can be reset to zero; when the measuring component 200 is in the measuring state, the upper end face support component 230 fits the upper end face of the cylinder block 10, the front end face support component 220 fits the front end face of the cylinder block 10, the measuring component 240 is adjusted to be embedded in the spindle hole of the cylinder block 10, and the actual crankshaft center distance can be obtained.

[0066] When measuring, the measuring device 20 of the present application operates the measuring component 200 to a calibration state, such as Figure 4 As shown, at this time, the upper end surface support component 230 of the measuring component 200 is adjusted to fit with the calibration upper end surface 120, and the front end surface support component 220 is adjusted to fit with the calibration front end surface 110, the measuring component 240 is embedded in the calibration spindle hole 130, and the measuring component 240 can be reset to zero. At this time, the dimension reflected by the measuring component 240 is L1+L2, where L1 is the vertical distance from the measuring point to the upper end surface of the cylinder body 10, and L2 is the distance from the measuring point to the wall of the spindle hole in the direction perpendicular to the center line O of the spindle hole and the upper end surface A of the cylinder body 10. It should be noted here that L1+L2=L, which means that the final dimension reflected by the measuring component 200 after the calibration component 100 is installed in place is the crankshaft center distance L.

[0067] After calibration, operate the measuring assembly 200 to the cylinder 10 to be measured, such as Figure 5 As shown, the upper end surface support component 230 is fitted with the upper end surface of the cylinder block 10, the front end surface support component 220 is fitted with the front end surface of the cylinder block 10, and the measuring component 240 is adjusted to be embedded in the main shaft hole of the cylinder block 10, and the actual crankshaft center distance L1+L2' can be obtained.

[0068] It should be noted that when the actual crankshaft center distance meets the error requirement, L1+L2'=L1+L2=L, that is, L2'=L2, otherwise, L2'≠L2.

[0069] Since the measuring device 20 of the present application has completed the calibration of the verticality of the upper end face 120 and the front end face before measuring the cylinder body 10 , the measurement result is more accurate on this basis, thereby improving the measurement accuracy of the measuring device 20 .

[0070] The specific structure of the calibration component 100 is described in detail below with reference to the accompanying drawings:

[0071] See also Figure 6 and Figure 7The function of the calibration component 100 of the present application is to complete the calibration of the measuring component 200 to ensure the verticality of the upper end face support component 230 and the front end face support component 220 of the measuring component 200. In some examples, the calibration component 100 includes a calibration bracket 140 and a calibration support plate. The calibration support plate is arranged on the calibration bracket 140, and one end of the calibration support plate forms a calibration upper end face 120, and part or all of the plate surface of the calibration support plate forms a calibration front end face 110, and the calibration spindle hole 130 passes through the calibration spindle hole 130.

[0072] In the figure, the calibration support plate includes two calibration support plates, namely a first calibration support plate 111 and a second calibration support plate, wherein the plate surface of the first calibration support plate 111 is perpendicular to the plate surface of the second calibration support plate, wherein the first calibration support plate 111 is used to form a calibration front end surface 110, and the second calibration support plate is used to form a calibration upper end surface 120. The first calibration support plate 111 and the second calibration support plate can be an integrated structure or a split structure.

[0073] In some examples, the entire surface of the first calibration support plate 111 is used to form the calibration front end face 110, or in order to reduce the difficulty of processing, in some examples of the present application, the calibration assembly 100 also includes a calibration beam 160, which is disposed on the calibration support plate to form the calibration front end face 110, and the first calibration support plate 111 forms the calibration front end face 110 through the calibration beam 160. Since the processing area of ​​the calibration beam 160 is much smaller than the surface area of ​​the first calibration support plate 111, the overall processing difficulty is reduced.

[0074] In addition, the first calibration support plate 111 is also provided with a first mounting hole 112 for mounting the calibration beam 160 and a second mounting hole 113 for mounting the calibration spindle hole 130. It should be noted here that the second mounting hole 113 can directly form the calibration spindle hole 130, and specifically the depth of the second mounting hole 113 is consistent with the depth of the spindle hole of the standard cylinder body 10; or the calibration spindle hole 130 is formed by providing a calibration spindle seat to cooperate with the second mounting hole 113, and at this time the total thickness of the second mounting hole 113 and the calibration spindle seat is consistent with the depth of the spindle hole of the standard cylinder body 10.

[0075] In addition, in order to further improve the measurement accuracy of the measuring assembly 200 in the measuring device 20, in some examples of the present application, the calibration assembly 100 may further include an auxiliary support plate 150, which is detachably arranged on the plate surface of the calibration support plate to fit with the side surface of the support frame 210. By arranging the auxiliary support plate 150, the center line of the support frame 210 can be arranged on the vertical plane between the center line of the spindle hole and the upper end surface.

[0076] For easy holding, in some examples of the present application, the calibration assembly 100 further includes a calibration handle 170 , which is disposed on the calibration bracket 140 and / or the calibration support plate. In the figure, the calibration handle 170 is disposed on the calibration bracket 140 .

[0077] It should be noted that the calibration bracket 140 in the present application is a triangular structure, so as to facilitate operation when the measuring assembly 200 is calibrated. Specifically, the calibration bracket 140 includes a first support rod 141, a second support rod 142 and a third support rod 143, which are connected end to end to form a triangular structure. In the figure, the calibration support plate is mainly installed on the first support rod 141. Specifically, it can be connected by welding, fasteners, etc.

[0078] For easy observation, the calibration bracket 140 of the present application may further include a support foot 144 , which is disposed on the third support rod 143 and extends along the length direction of the third support rod 143 to form an effective support for the entire calibration assembly 100 .

[0079] The above calibration brackets 140 are two that are arranged opposite to each other on the calibration support plate. Of course, there may be more, which is not specifically limited in this application.

[0080] When the calibration component 100 is supported by the support legs 144 , the angle between the second support rod 142 and the support legs 144 is greater than 90 degrees, which facilitates observation of whether the measurement component 200 is calibrated successfully.

[0081] The above mainly introduces the structure of the calibration component 100. The present application hereinafter mainly introduces the structure of the measurement component 200:

[0082] See also Figures 8 to 19 The function of the measuring assembly 200 of the present application is to complete the actual measurement of the crankshaft center distance of the cylinder block 10. As described above, the measuring assembly 200 may include a support frame 210, an upper end surface support component 230, a front end surface support component 220 and a measuring component 240. Among them, the support frame 210 is used to realize the connection between the various components, the upper end surface support component 230 is used to support the measuring assembly 200 on the upper end surface of the cylinder block 10, the front end surface support component 220 is used to support the measuring assembly 200 on the front end surface of the cylinder block 10, and the measuring component 240 is used for measurement.

[0083] In some examples, the front end face support component 220 includes a front end face support plate 221 and a front end face support block 222, the front end face support plate 221 is located on the side of the support frame 210, and the plate surface of the front end face support plate 221 is parallel to the plate surface of the support frame 210; the front end face support block 222 is detachably arranged on the front end face support plate 221, and the relative height of the front end face support block 222 relative to the plate surface of the front end face support plate 221 is adjustable.

[0084] The number of the front face support components 220 can be an odd number or an even number. In order to further ensure verticality, the number of the front face support components 220 is an even number, and they are symmetrically arranged on both sides of the support frame 210. In the figure, the number of the front face support components 220 is four, and they are symmetrically arranged on both sides of the support frame 210.

[0085] Since the front end face support block 222 is detachably arranged on the front end face support plate 221, specifically, it can be detachably arranged on the front end face support plate 221 through the front end fastener 223. Therefore, according to the actual situation of the cylinder body 10 structure, a suitable support point can be selected, and the front end face support block 222 can be installed at the support point to complete the support of the front end face support component 220 on the front end face of the cylinder body 10.

[0086] In order to adapt to the installation of the front face support plate 221, the support frame 210 may include a support frame body 211, a third mounting hole 212 and a slide groove 213, wherein the third mounting hole 212 is provided at the second end of the support frame body 211 for installing the spindle hole alignment head 243 described later; the slide groove 213 is provided on the side of the support frame body 211 for installing the front face support component 220, four front face support components 220 are shown in the figure, and each front face support plate 221 is provided with a plurality of front end adjustment holes, and the front face support blocks 222 of different heights can be selected, or the height of the front face support blocks 222 can be adjusted. Specifically, the front face support blocks 222 are positioning pins of different heights of 15 to 35 mm, which are sufficient to be attached to the front face of the cylinder body 10 of different models, play a supporting role, greatly enhance the measurement stability of the measuring assembly 200, and ensure the measurement accuracy.

[0087] In order to reduce the weight of the measuring assembly 200 , a plurality of weight-reducing holes 214 may be provided on the support frame 210 to facilitate operation.

[0088] The front end face support plate 221 may include a front end face support plate body 221a, a front end face connecting seat 221b, a front end adjustment hole 221c and a slider 221d, wherein the front end face support plate body 221a is connected to the front end face connecting seat 221b, wherein a plurality of front end adjustment holes 221c are provided on the front end face support plate body 221a, and the slider 221d is arranged at one end of the front end face connecting seat 221b close to the slide groove 213 and can slide in the slide groove 213.

[0089] In some examples, the upper end surface support component 230 includes an upper end surface support plate 231 and an upper end surface support block 232, the upper end surface support plate 231 is located at the first end of the support frame 210, and the plate surface of the upper end surface support plate 231 is perpendicular to the plate surface of the support frame 210; the upper end surface support block 232 is detachably arranged on the upper end surface support plate 231, and the relative height of the upper end surface support block 232 relative to the plate surface of the upper end surface support plate 231 is adjustable.

[0090] Since the upper end surface support block 232 is detachably arranged on the upper end surface support plate 231, a suitable support point can be selected according to the actual structure of the cylinder body 10, and the upper end surface support block 232 can be installed at the support point to complete the support of the upper end surface support component 230 on the upper end surface of the cylinder body 10.

[0091] Specifically, the upper end surface support plate 231 includes a plurality of upper end adjustment holes 2311, and the support height is adjusted by setting upper end surface support blocks 232 of different heights to achieve upper end surface support of cylinder bodies 10 of different models; or the upper end surface support block 232 is height-adjustable relative to the upper end surface support plate 231. Exemplarily, the upper end surface support block 232 can be equipped with positioning pins of different heights of 15 to 35 mm.

[0092] Some examples include Fig.11 and Fig.12 As shown, the measuring component 240 includes a first measuring head 241, a second measuring head 242, a spindle hole alignment head 243 and a micrometer 244. The first measuring head 241, the spindle hole alignment head 243 and the second measuring head 242 are arranged in sequence along the center line of the support frame 210, and the first measuring head 241 and the second measuring head 242 are movable in the direction of the center line of the support frame 210; the spindle hole alignment head 243 is installed on the support frame 210, and a first elastic member 245 is provided between the spindle hole alignment head 243 and the first measuring head 241, and a second elastic member 246 is provided between the spindle hole alignment head 243 and the second measuring head 242; the head 244a of the micrometer 244 is arranged on the first measuring head 241, and the impact head 244c of the micrometer 244 is arranged on the second measuring head 242.

[0093] In the above structure, the first measuring head 241 and the second measuring head 242 float relative to the spindle hole alignment head 243 under the action of the first elastic member 245 and the second elastic member 246 respectively. When the above calibrated measuring assembly 200 is measured, the upper support component is placed on the upper end surface of the cylinder body 10, the first measuring head 241 is compressed and contacts the hole wall at the upper end of the spindle hole, the second measuring head 242 is compressed and placed in the spindle hole, and then released. The second elastic member 246 lifts the second measuring head 242 to contact the hole wall at the bottom end of the spindle hole, and pushes the second measuring head 242 along the center line of the spindle hole, so that the front end face support component 220 contacts the front end face of the cylinder body 10. At this time, the spindle hole alignment head 243 moves axially in the spindle hole, and the spindle hole alignment head 243 contacts the spindle hole, and the measuring assembly 200 is straightened. At this time, the impact head 244c moves with the second measuring head 242, hits the lever, and the micrometer 244 displays the actual crankshaft center distance.

[0094] In some examples of the present application, the structures of the first measuring head 241 and the second measuring head 242 are specifically disclosed, wherein the first measuring head 241 includes a first measuring frame 241a and a first measuring block 241c, wherein the first measuring frame 241a passes through the first guide groove 215 of the support frame 210 and is movable relative to the support frame 210; the first measuring block 241c is arranged on the side of the first measuring frame 241a opposite to the first measuring head 241; the head 244a of the micrometer 244 is fixed to the second end of the first measuring frame 241a; and the first elastic member 245 is located between the first measuring frame 241a and the spindle hole alignment head 243.

[0095] In order to reduce the risk of the first measuring frame 241a scratching the spindle hole, in some examples of the present application, the first measuring head 241 may also include a first elastic wrapping member 241b, wherein the first elastic wrapping member 241b is arranged on the side opposite to the first measuring frame 241a and the second measuring head 242, and exposes the first measuring block 241c. The first elastic wrapping member 241b is made of a flexible material, such as rubber. The first elastic wrapping member 241b may be directly wrapped onto the first measuring frame 241a, or the first elastic wrapping member 241b may be fixed to the first measuring frame 241a via a first fastener 241d.

[0096] Some examples include Fig.11 and Fig.13As shown, the second measuring head 242 includes a second measuring frame 242a and a second measuring block 242c, wherein the second measuring frame 242a passes through the second guide groove 216 of the support frame 210 and is movable relative to the support frame 210; the second measuring block 242c is arranged on the side of the second measuring frame 242a opposite to the first measuring head 241; the impact head 244c of the micrometer 244 is fixed to the second end of the second measuring frame 242a; and the second elastic member 246 is located between the second measuring frame 242a and the spindle hole alignment head 243.

[0097] In order to reduce the risk of the second measuring frame 242a scratching the spindle hole, in some examples of the present application, the second measuring head 242 may also include a second elastic wrapping member 242b, which is arranged on the side of the second measuring frame 242a opposite to the first measuring head 241, and exposes the second measuring block 242c. The second elastic wrapping member 242b is made of a flexible material, such as rubber. The second elastic wrapping member 242b can be directly wrapped onto the second measuring frame 242a, or the second elastic wrapping member 242b can be fixed to the second measuring frame 242a by a second fastener 242e.

[0098] For easy operation, the second measuring head 242 further includes a measuring handle 242d, which is arranged to wrap around the second end of the second measuring frame 242a. The measuring handle 242d is made of soft materials, such as foam, rubber, etc.

[0099] It should be noted that the head 244a of the micrometer 244 is rigidly connected to the first measuring frame 241a, so that the change in the position of the first measuring frame 241a reflects the change in the position of the head 244a of the micrometer 244; the second measuring frame 242a is rigidly connected to the impact head 244c, so that the change in the position of the second measuring frame 242a reflects the change in the position of the impact head 244c; when the position of the head 244a of the micrometer 244 remains unchanged, the change in the position of the measuring rod 244b of the micrometer 244 relative to the impact head 244c reflects the change in the position of the center line of the spindle hole.

[0100] Furthermore, the dial head 244a of the micrometer 244 is coaxially arranged with the first measuring frame 241a, and the second measuring frame 242a is coaxially arranged with the impact head 244c.

[0101] See also Figures 14 to 19The function of the spindle alignment head is to complete the alignment of the measuring component 240 with the spindle hole. The spindle hole alignment head 243 includes a tapered sleeve 243b, a flange guide sleeve 243a, an intermediate shaft 243d, a limiting block 243c and a third elastic member 243e, wherein the tapered sleeve 243b is adjustably arranged on the outer periphery of the flange guide sleeve 243a, and the tapered sleeve 243b has a large end 243b1 and a small end, and the large end 243b1 has a taper 243b2 to fit with the hole wall of the spindle hole A2; the flange guide sleeve 243a is installed on the support frame 210; the intermediate shaft 243d passes through the flange guide sleeve 243a and the tapered sleeve 243b; the limiting block 243c is arranged on one end of the intermediate shaft 243d exposed from the flange guide sleeve 243a; the third elastic member 243e is sleeved on the intermediate shaft 243d and abuts against the tapered sleeve 243b.

[0102] During calibration and measurement, the measuring device 20 is placed on the upper end face A1 of the cylinder body and the main shaft hole A2. By arranging the tapered sleeve 243b and placing it on the main shaft hole A2 until the large end of the main shaft hole A2 fits, the shaking of the measuring device 20 can be reduced, while further ensuring the verticality of the center line of the upper end face A1 of the cylinder body and the main shaft hole A2.

[0103] The above-mentioned tapered sleeve 243b includes a large end 243b1 and a small end. The function of the large end 243b1 is to facilitate alignment so as to fit with the hole wall of the main shaft hole A2 to ensure the verticality of the measuring device 20 during the measurement process. For this purpose, it is provided with a taper 243b2, and the small end can be conveniently installed in the main shaft hole.

[0104] The above-mentioned large end 243b1 is a centrally symmetrical octagonal structure, wherein the octagonal structure has a first side, a second side, a third side, a fourth side, a fifth side, a sixth side, a seventh side and an eighth side, and the above-mentioned sides are connected end to end to form an octagonal structure; the first side and the fifth side are arranged opposite to each other, the third side and the seventh side are arranged opposite to each other, and the side surfaces corresponding to the third side and the seventh side have a taper 243b2 in the height direction.

[0105] By using the measuring device 20 of the above embodiment of the present application, the calibration piece is calibrated and zeroed to simplify the detection operation steps. After calibration, the travel of the positioning pin and the taper sleeve 243b is adjusted, and the data is directly read, which is easy to operate and saves time and effort.

[0106] In the above, 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 one or more of the features.

[0107] The above description is only a preferred embodiment of the present invention and an explanation of the technical principles used, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. The scope of the invention involved in the present invention is not limited to the technical solution formed by a specific combination of the above-mentioned technical features, but also should cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A crankshaft center distance measuring device, used to measure the crankshaft center distance of a cylinder body, characterized in that: The invention comprises a calibration component (100) and a measurement component (200), wherein: The calibration component (100) comprises a calibration upper end surface (120), a calibration front end surface (110) and a calibration spindle hole (130); the calibration upper end surface (120) is parallel to the center line of the calibration spindle hole (130); the calibration front end surface (110) is perpendicular to the center line of the calibration spindle hole (130) and the calibration upper end surface (120); the distance between the center line of the calibration spindle hole (130) and the calibration upper end surface (120) is equal to the standard crankshaft center distance; The measuring assembly (200) comprises a support frame (210), an upper end surface supporting component (230), a front end surface supporting component (220) and a measuring component (240), wherein the upper end surface supporting component (230) is arranged at a first end of the support frame (210); the front end surface supporting component (220) is arranged at a side surface of the support frame (210); and the measuring component (240) is arranged at a second end of the support frame (210); The measuring component (200) is constructed to be in a calibration state and a measuring state. When the measuring component (200) is in the calibration state, the upper end surface support component (230) is adjusted to fit the calibration upper end surface (120), and the front end surface support component (220) is adjusted to fit the calibration front end surface (110). The measuring component (240) is embedded in the calibration spindle hole (130), and the measuring component (240) can be reset to zero. When the measuring component (200) is in the measuring state, the upper end surface support component (230) fits the upper end surface of the cylinder block (10), and the front end surface support component (220) fits the front end surface of the cylinder block (10). The measuring component (240) is adjusted to fit in the spindle hole of the cylinder block (10), and an actual crankshaft center distance can be obtained. The measuring component (240) comprises a first measuring head (241), a second measuring head (242), a spindle hole alignment head (243) and a micrometer (244); the first measuring head (241), the spindle hole alignment head (243) and the second measuring head (242) are arranged in sequence along the center line of the support frame (210); the first measuring head (241) and the second measuring head (242) are movable in the direction of the center line of the support frame (210); the spindle hole alignment head (243) and the second measuring head (242) are movable in the direction of the center line of the support frame (210); 3) is installed on the support frame (210), and a first elastic member (245) is provided between the spindle hole alignment head (243) and the first measuring head (241), and a second elastic member (246) is provided between the spindle hole alignment head (243) and the second measuring head (242); the dial gauge (244a) is arranged on the first measuring head (241), and the impact head (244c) of the dial gauge (244) is arranged on the second measuring head (242).

2. The crankshaft center distance measuring device according to claim 1, characterized in that: The calibration component (100) comprises a calibration bracket (140) and a calibration support plate, wherein the calibration support plate is arranged on the calibration bracket (140), and one end of the calibration support plate forms the calibration upper end surface (120), a part of the plate surface or the entire plate surface of the calibration support plate forms the calibration front end surface (110), and the calibration spindle hole (130) passes through the calibration spindle hole (130).

3. The crankshaft center distance measuring device according to claim 2, characterized in that: The calibration assembly (100) further comprises a calibration beam (160), wherein the calibration beam (160) is arranged on the calibration support plate to form the calibration front end surface (110); and / or The calibration assembly (100) further comprises an auxiliary support plate (150), wherein the auxiliary support plate (150) is detachably arranged on a plate surface of the calibration support plate so as to fit with a side surface of the support frame (210); and / or The calibration assembly (100) further comprises a calibration handle (170), wherein the calibration handle (170) is arranged on the calibration bracket (140) and / or the calibration support plate.

4. The crankshaft center distance measuring device according to claim 1, characterized in that: The upper end surface support component (230) comprises an upper end surface support plate (231) and an upper end surface support block (232); the upper end surface support plate (231) is located at the first end of the support frame (210), and the plate surface of the upper end surface support plate (231) is perpendicular to the plate surface of the support frame (210); the upper end surface support block (232) is detachably arranged on the upper end surface support plate (231), and the relative height of the upper end surface support block (232) relative to the plate surface of the upper end surface support plate (231) is adjustable.

5. The crankshaft center distance measuring device according to claim 1, characterized in that: The front end face support component (220) comprises a front end face support plate (221) and a front end face support block (222); the front end face support plate (221) is located on a side surface of the support frame (210), and the plate surface of the front end face support plate (221) is parallel to the plate surface of the support frame (210); the front end face support block (222) is detachably arranged on the front end face support plate (221), and the relative height of the front end face support block (222) relative to the plate surface of the front end face support plate (221) is adjustable; and / or The number of the front end surface support components (220) is an even number, and they are symmetrically arranged on both sides of the support frame (210).

6. The crankshaft center distance measuring device according to claim 1, characterized in that: The first measuring head (241) comprises a first measuring frame (241a), a first elastic wrapping member (241b) and a first measuring block (241c), wherein the first measuring frame (241a) passes through a first guide slot of the support frame (210) and is movable relative to the support frame (210); the first measuring block (241c) is arranged on a side of the first measuring frame (241a) opposite to the first measuring head (241); the first elastic wrapping member (241b) is arranged on a side of the first measuring frame (241a) opposite to the second measuring head (242), and the first measuring block (241c) is exposed; and the dial gauge (244a) is fixed to the second end of the first measuring frame (241a).

7. The crankshaft center distance measuring device according to claim 6, characterized in that: The second measuring head (242) comprises a second measuring frame (242a), a second elastic wrapping member (242b) and a second measuring block (242c), wherein the second measuring frame (242a) passes through the second guide slot of the support frame (210) and is movable relative to the support frame (210); the second measuring block (242c) is arranged on a side of the second measuring frame (242a) opposite to the first measuring head (241); the second elastic wrapping member (242b) is arranged on a side of the second measuring frame (242a) opposite to the first measuring head (241) and exposes the second measuring block (242c); and the impact head (244c) of the micrometer (244) is fixed to the second end of the second measuring frame (242a).

8. The crankshaft center distance measuring device according to claim 7, characterized in that: The second measuring head (242) further comprises a measuring handle (242d), and the measuring handle (242d) is arranged to wrap around the second end of the second measuring frame (242a).

9. The crankshaft center distance measuring device according to claim 6, characterized in that: The spindle hole alignment head (243) comprises a tapered sleeve (243b), a flange guide sleeve (243a), an intermediate shaft (243d), a limiting block (243c) and a third elastic member (243e), wherein the tapered sleeve (243b) is adjustably arranged on the outer periphery of the flange guide sleeve (243a), and the tapered sleeve (243b) has a large end (243b1) and a small end, and the large end (243b1) has a taper (243b2) to align with the spindle. The flange guide sleeve (243a) is mounted on the support frame (210); the intermediate shaft (243d) passes through the flange guide sleeve (243a) and the tapered sleeve (243b); the limiting block (243c) is arranged at one end of the intermediate shaft (243d) exposed from the flange guide sleeve (243a); and the third elastic member (243e) is sleeved on the intermediate shaft (243d) and abuts against the tapered sleeve (243b).

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