Engine connecting rod deformation detection device

Abstract

The utility model relates to the technical field of detection, in particular to an engine connecting rod deformation detection device which comprises a workbench, a support is installed on the upper portion of the workbench, and the support can support the middle of a connecting rod so that the connecting rod can roughly extend in the first direction and end holes in the two ends of the connecting rod face roughly horizontally. The two sides of the workbench in the first direction are each provided with a measuring mechanism, the measuring mechanisms can move and be positioned relative to the workbench in the first direction and the second direction, each measuring mechanism comprises a dial indicator, and a posture adjusting assembly is connected between each dial indicator and the corresponding measuring mechanism. And the two measuring shafts are respectively in shaft hole fit with the large end hole and the small end hole of the connecting rod. Wherein the measuring rod of the dial indicator in one measuring mechanism is respectively aligned with the top surface and the side surface of the measuring shaft at the large end hole, and the measuring rod of the dial indicator in the other measuring mechanism is respectively aligned with the top surface and the side surface of the measuring shaft at the small end hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to detection technical field especially, it is a kind of engine connecting rod deformation detection device. BACKGROUND

[0002] The connecting rod of engine is roughly flat rod structure, one end is big end hole, the other end is small end hole, big end hole is used to connect with the crankshaft of engine, small end hole is used to connect with the pin shaft on piston.In the long-time use process, connecting rod is easy to bend relative to its axial direction (i.e.the length direction of connecting rod), also easy to twist around its axial direction, further affect the normal use of connecting rod.

[0003] In related technical solutions, for example, Chinese patent CN215832650U-Compressor connecting rod deformation measurement platform.The disclosed technical solution is to use centering chuck to fix the big end hole of connecting rod, so that the axis of big end hole remains horizontal, then uses shaft hole to install measuring shaft at small end hole, obtains different size values by moving dial gauge vertically abutting on the top surface and side surface of measuring shaft, judges whether the bending and twisting degree of the connecting rod meets the use requirement according to the size difference of size values before and after moving.

[0004] But in the technical solution, the measurement accuracy depends on the installation accuracy between centering chuck and workbench, the accuracy of centering chuck itself and the experience of user using centering chuck to clamp connecting rod.Otherwise, in the case that the axis of big end hole of connecting rod deviates from horizontal plane and vertical plane too much, it is easy to cause error in subsequent connecting rod deformation detection. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of engine connecting rod deformation detection device, can at least solve one of the above technical problems.

[0006] To solve the above technical problems, one or more embodiments of the utility model provide a kind of engine connecting rod deformation detection device, it has horizontal and mutually perpendicular first direction and second direction, including workbench and two measuring shafts, the upper portion of workbench is equipped with support, support can support the middle part of connecting rod, so that connecting rod extends along first direction and the end hole of both ends of connecting rod is generally horizontal.

[0007] The two sides of workbench along first direction are respectively equipped with one measuring mechanism, measuring mechanism can be respectively moved and positioned along first direction and second direction relative to workbench, measuring mechanism includes dial gauge and attitude adjusting assembly of adjusting the orientation of dial gauge;Two measuring shafts are respectively matched with the shaft hole of big end hole and small end hole of connecting rod;The measuring rod of one dial gauge can be respectively aligned with the top surface and side surface of measuring shaft at big end hole, and the measuring rod of another dial gauge can be respectively aligned with the top surface and side surface of measuring shaft at small end hole.

[0008] The above one or more technical solutions have the beneficial effects that:

[0009] In the scheme, the connecting rod is horizontally placed in the support, and the large end hole and the small end hole of the connecting rod are substantially horizontal. Measurement shafts are arranged at the large end hole and the small end hole respectively, and the top surface size difference and the side surface size difference of the measurement shafts at the large end hole and the small end hole are measured by using the dial gauges respectively, so that the inclination angles of the two measurement shafts with the horizontal plane and the vertical plane can be measured respectively. Then, the bending and the twisting angles of the connecting rod are obtained according to the differences of the two measurement values and the inclination angles of the horizontal plane and the vertical plane.

[0010] That is, the bending and the twisting degrees of the connecting rod in the scheme are measured without depending on the machining precision of the positioning structure, and the clamping difficulty of the connecting rod is also reduced, which is beneficial to improving the detection precision of the bending and the twisting degrees of the connecting rod. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a front view schematic diagram of the whole structure for clamping the connecting rod in the embodiment of the utility model;

[0012] Figure 2 It is a sectional view schematic diagram of the support in the embodiment of the utility model;

[0013] Figure 3 It is a schematic diagram of omitting part of the connecting rod when measuring the twisting of the connecting rod by using the dial gauge in the embodiment of the utility model;

[0014] Figure 4 It is a schematic diagram of omitting part of the connecting rod when measuring the bending of the connecting rod by using the dial gauge in the embodiment of the utility model.

[0015] In the figure, 1, workbench; 2, support; 211, side plate; 212, locking bolt; 213, support plate; 214, spring; 215, bottom plate; 3, connecting rod; 301, large end hole; 302, small end hole; 4, measuring mechanism; 41, dial gauge; 411, measuring rod; 5, first measurement shaft; 6, lifting assembly; 7, two-dimensional screw slide assembly; 8, second measurement shaft;

[0016] 71, first screw slide; 711, first screw; 712, first slide; 72, second screw slide; 722, second slide; 9, vertical rod; 10, horizontal rod; 11, hydraulic spring; 12, sliding sleeve. DETAILED DESCRIPTION

[0017] In order to clearly illustrate the technical features of the scheme, the utility model will be described in detail below through specific implementation manners, and in combination with the drawings thereof.

[0018] Reference Figures 1-4The embodiment provides an engine connecting rod 3 deformation detection device, which has a horizontal and mutually perpendicular first direction and second direction, and comprises a workbench 1, a support 2 is installed on the upper portion of the workbench 1, the support 2 can support the middle portion of a connecting rod 3, so that the connecting rod 3 extends along the first direction and the end holes at both ends of the connecting rod 3 are directed to be substantially horizontal; a measuring mechanism 4 is arranged on each side of the workbench 1 along the first direction, the measuring mechanism 4 can move and position relative to the workbench 1 along the first direction and the second direction respectively, and the measuring mechanism 4 comprises a dial gauge 41 and a posture adjusting assembly for adjusting the direction of the dial gauge 41.

[0019] Specifically, the workbench 1 is a metal plate-shaped mechanism, which has a horizontal upper surface forming a working surface for detecting the deformation of the connecting rod 3. In some other embodiments, supporting legs can be arranged on the bottom surface of the workbench 1 to raise the workbench 1, so that the workbench 1 can still meet the height requirement when arranged on the ground.

[0020] Specifically, the support 2 is installed on the middle portion of the upper surface of the workbench 1, and the support 2 can be directly connected with the workbench 1 or indirectly connected with the workbench 1 through a lifting assembly 6.

[0021] Specifically, the supported connecting rod 3 extends along the first direction, and the end holes at both ends of the connecting rod 3 are directed to be substantially horizontal. As a specific embodiment, substantially horizontal means that the included angle with the horizontal direction is not more than 10 degrees. As mentioned above, the workbench 1 is provided with a measuring mechanism 4 on each side along the first direction, and the two measuring mechanisms 4 are arranged on both sides of the connecting rod 3 along the first direction when the connecting rod 3 is installed on the support 2.

[0022] The embodiment further comprises two measuring shafts which are respectively matched with the large end hole 301 and the small end hole 302 of the connecting rod 3. The two measuring rods 411 of the two dial gauges 41 in one measuring mechanism 4 are respectively aligned with the top surface and the side surface of the measuring shaft at the large end hole 301, and the two measuring rods 411 of the two dial gauges 41 in the other measuring mechanism 4 are respectively aligned with the top surface and the side surface of the measuring shaft at the small end hole 302.

[0023] Specifically, the measuring shaft inserted into the large end hole 301 is a first measuring shaft 5, and the measuring shaft inserted into the small end hole 302 is a second measuring shaft 8. The outer diameter of the first measuring shaft 5 is equal to the inner diameter of the large end hole 301, and the outer diameter of the second measuring shaft 8 is equal to the inner diameter of the small end hole 302. Therefore, for different models of engine connecting rods 3, different diameters of the first measuring shaft 5 and the second measuring shaft 8 need to be configured in advance for use. In use, at least one end of the first measuring shaft 5 is arranged to pass through the large end hole 301, and at least one end of the second measuring shaft 8 is arranged to pass through the small end hole 302.

[0024] In the embodiment, the support 2 comprises a U-shaped plate with an opening facing upward, and one side wall of the U-shaped plate is provided with a locking bolt 212.

[0025] Specifically, the U-shaped plate comprises a bottom plate 215 and two side plates 211, the side plates 211 are vertically arranged and parallel to the first direction, and the two side plates 211 are oppositely arranged and the bottom ends of the two side plates 211 are connected by the bottom plate 215. One of the side plates 211 has the side wall mentioned above, and the side plate 211 is provided with a threaded hole extending through itself and along the second direction to connect the locking bolt 212.

[0026] In the embodiment, the bottom of the support 2 is rotatably provided with a support plate 213, one end of the support plate 213 is rotatably connected with the bottom wall of the support 2, and the other end of the support plate 213 is provided with a spring 214 between the bottom wall of the support 2.

[0027] Specifically, the support plate 213 is a square plate, one end of the square plate is rotatably connected with the bottom plate 215, and the other end of the square plate is provided with a spring 214 between the bottom plate 215. Two sides of the square plate are in abutment with the inner walls of the side plates 211.

[0028] In the embodiment, the lower part of the support 2 is provided with a lifting assembly 6 for lifting the support 2.

[0029] Specifically, the lifting assembly 6 can be an electric push rod or a hydraulic push rod, etc. Taking the electric push rod as an example, the extending end of the electric push rod extends vertically upward and is fixed to the bottom of the support 2, and the shell end of the electric push rod extends vertically downward and is fixed to the upper surface of the workbench 1.

[0030] In the embodiment, the measuring mechanism 4 comprises a two-dimensional lead screw sliding table assembly 7 capable of driving the posture adjusting assembly to slide along the first direction and the second direction.

[0031] Specifically, the two-dimensional lead screw sliding table assembly 7 is fixed to the upper surface of the workbench 1, and specifically, it comprises a first lead screw sliding table 71 and a second lead screw sliding table 72, the first lead screw sliding table 71 comprises a first lead screw 711, a first sliding table 712 and a first frame body, and the second lead screw sliding table 72 comprises a second lead screw, a second sliding table 722 and a second frame body. The second frame body is supported by the workbench 1, the first frame body is fixed to the upper end of the second sliding table 722, and the first sliding table 712 is fixed to the lower end of the vertical rod 9 of the posture adjusting assembly. In order to facilitate the driving of the lead screw, a rotating wheel is installed at the end of the first lead screw 711 and the second lead screw, and a handle is installed on the rotating wheel. By rotating the handle of the first lead screw 711, the posture adjusting assembly can be translated along the first direction, and by rotating the handle of the second lead screw, the posture adjusting assembly can be translated along the second direction.

[0032] In the embodiment, the posture adjusting assembly comprises a vertical rod 9, a vertical sliding sleeve 12 is arranged on the upper part of the vertical rod 9, the sliding sleeve 12 is fixed with one end of a horizontal rod 10, and the other end of the horizontal rod 10 is rotationally connected with a dial gauge 41.

[0033] In order to realize the guidance of the vertical sliding of the sliding sleeve 12, locking bolts 212 are arranged outside the sliding sleeve 12.

[0034] In order to realize the rotational connection between the dial gauge 41 and the horizontal rod 10, the dial gauge 41 is vertically fixed with a fixed column (not shown in the figure), the horizontal rod 10 is vertically fixed with a rotating sleeve (not shown in the figure), the fixed column is inserted with the rotating sleeve to realize the rotational connection, and the side wall of the rotating sleeve is provided with a clamping bolt, after the clamping bolt is tightened, the head end of the clamping bolt can abut against the fixed column, so as to limit the mutual rotation of the dial gauge 41 and the horizontal rod 10.

[0035] In the embodiment, when the bracket 2 is in direct contact with the workbench 1, the workbench 1 is provided with at least one row of first holes arranged in the first direction in sequence, and the bottom of the bracket 2 is provided with a second hole which can be aligned and fixed with any first hole.

[0036] It can be known that the first hole and the second hole can be aligned by inserting a positioning pin thereinto, so as to realize the positioning of the workbench 1 and the bracket 2 in the horizontal direction.

[0037] In the embodiment, the bracket 2 is further provided with hydraulic springs 11 on both sides in the first direction. Specifically, the upper end of the hydraulic spring 11 is provided with an elastic supporting plate 213, the supporting plate 213 is used for expanding the supporting area of the hydraulic spring 11, the hydraulic spring 11 can support the large end hole 301 side and the small end hole 302 side of the horizontally arranged engine connecting rod 3 respectively, so as to avoid the damage of the bracket 2 due to excessive force and the displacement of the engine connecting rod 3 caused by unstable clamping of the bracket 2.

[0038] Specifically, the measuring column in the large end hole is a first measuring column 5, and the measuring column in the small end hole is a second measuring column 8.

[0039] Working principle: when the bending degree of the connecting rod 3 is measured, the two dial gauges 41 are respectively abutted to the side surfaces of the first measuring column 5 and the second measuring column 8, so that the measuring rods 411 are substantially perpendicular to the axes of the two measuring columns. Two measuring points are selected on the two measuring columns respectively, so that the dial gauges 41 are slid in the second direction and are lifted vertically to obtain the size difference of the positions of the two measuring points in the first direction, and the size difference H1 of the two measuring points on the same measuring column is obtained. The size difference H1 is used to obtain the included angle α1 between the measuring axis and the vertical plane in cooperation with the distance L1 between the two points. The included angles α1 between the two measuring axes and the vertical plane are obtained respectively. If the difference between the two α1 is less than a set value, the bending degree of the connecting rod 3 meets the requirements, otherwise the bending degree of the connecting rod 3 does not meet the use requirements.

[0040] When the twist of the connecting rod 3 is measured, the two dial gauges 41 abut to the top surface of the first measuring column 5 and the second measuring column 8 respectively, so that the measuring rod 411 is substantially perpendicular to the axis of the corresponding measuring column. Two measuring points are selected on the two measuring columns respectively, so that the dial gauges 41 slide in the first direction and the second direction to obtain the height difference H2 of the two dial gauges 41, and the height difference H2 of the two measuring points on the same measuring column is obtained. The angle α2 between the measuring axis and the horizontal plane is obtained by using the height difference H2 and the distance L2 between the two points. The angles α2 between the two measuring axes and the vertical are obtained respectively. If the difference between the two α2 is less than a set value, the twist degree of the connecting rod 3 meets the requirement, otherwise the twist degree of the connecting rod 3 does not meet the use requirement.

[0041] The above specific embodiments cannot be regarded as the limitation of the protection scope of the utility model, and any alternative improvement or transformation made by the skilled in the art to the embodiments of the utility model falls within the protection scope of the utility model.

[0042] The parts not described in the utility model are the known technology of the skilled in the art.

Claims

1. An engine connecting rod deformation detection device having a first direction and a second direction which are horizontal and perpendicular to each other, characterized by, The workbench is provided with a support installed on the upper part of the workbench, the support can support the middle part of the connecting rod, so that the connecting rod extends along the first direction and the end holes at both ends of the connecting rod face the substantially horizontal direction; The workbench is provided with a measuring mechanism on each side along the first direction, the measuring mechanism can move and position along the first direction and the second direction respectively relative to the workbench, the measuring mechanism comprises a dial gauge and a posture adjusting assembly for adjusting the orientation of the dial gauge; The workbench is provided with two measuring shafts which are respectively matched with the large end hole and the small end hole of the connecting rod, the measuring rod of one dial gauge can be aligned with the top surface and the side surface of the measuring shaft at the large end hole, and the measuring rod of the other dial gauge can be aligned with the top surface and the side surface of the measuring shaft at the small end hole.

2. The engine connecting rod deformation detection apparatus according to claim 1, characterized by, The support comprises a U-shaped plate with an opening facing upward, one side wall of the U-shaped plate is provided with a locking bolt.

3. The engine connecting rod deformation detection apparatus according to claim 1, characterized by, The bottom of the support is rotatably provided with a support plate, one end of the support plate is rotatably connected with the bottom wall of the support, and the other end of the support plate is provided with a spring relative to the bottom wall of the support.

4. The engine connecting rod deformation detection apparatus according to claim 1, characterized by The lower part of the support is provided with a lifting assembly for lifting the support.

5. The engine connecting rod deformation detection apparatus according to claim 1, characterized by The measuring mechanism comprises a two-dimensional screw slide assembly which can drive the posture adjusting assembly to slide along the first direction and the second direction.

6. The engine connecting rod deformation detection apparatus according to claim 1, characterized by The posture adjusting assembly comprises a vertical rod, a sliding sleeve which can slide and position along the vertical direction is installed on the upper part of the vertical rod, one end of the sliding sleeve is fixed with a horizontal rod, and the other end of the horizontal rod is rotatably connected with the dial gauge.

7. The engine connecting rod deformation detection apparatus according to claim 1, characterized by The workbench is provided with at least one row of first holes arranged along the first direction in sequence, the bottom of the support is provided with a second hole, and the second hole can be aligned with and fixed with any first hole.

8. The engine connecting rod deformation detection apparatus according to claim 1, characterized by The support is further provided with a hydraulic spring on each side along the first direction.

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