Engine bearing pedestal detection device

Abstract

The utility model provides an engine bearing pedestal detection device. Relates to the field of detection tools, and aims to solve the problem that corresponding detection bearing equipment is difficult to meet requirements during workpiece measurement at present, a positioning plate is adopted to form an inclined bearing surface for bearing the end face of a part to restrain the axial position of the part, and two fixed positioning columns are combined with a movable positioning column to form a positioning structure with a variable public inscribed circle. The fixed positioning column and the movable positioning column are in contact with a positioning hole of a part together, three-point positioning of the positioning hole of the part is formed, radial constraint of the part is formed, the posture of the part is changed through annular rotation, the positioning and bearing requirements of the part during jumping, planeness and shaft neck cylindricity measurement are met, and the measurement efficiency and the measurement precision are improved.

Description

Technical Field

[0001] The utility model relates to the field of detection tooling, in particular to an engine bearing seat detection device. Background Art

[0002] The camshaft of a high-power engine is connected by a camshaft, a bearing seat, a gasket, bolts, etc. Its accuracy directly affects the power of the engine, thereby increasing fuel consumption; large errors will lead to incorrect valve opening and closing times, thereby affecting the pressure of the intake and exhaust cylinders, and will also cause excessive mechanical vibration and increased wear. Some cases will cause resonance, premature damage to the machine, or even serious accidents such as machine scrapping. The dimensional error of the camshaft is accumulated by the runout of the inner and outer stoppers of the camshaft and the bearing seat to the journal, the coaxiality of the journal, the runout of the two end faces to the stoppers, and the flatness. Therefore, the finished parts of the camshaft and the bearing seat need to control the runout, flatness, and cylindricality of the journal on both end faces to ensure the overall assembly accuracy.

[0003] At present, the main measurement methods for bearing seats and camshafts include three-coordinate measurement and V-support measurement. In the three-coordinate measurement, the three coordinate positions of the surface points of the parts are collected by a probe. However, for inspection items such as runout, roundness, and flatness, the collected data is limited, the collection points are discontinuous, and it is not easy to contain the limit value. There is a certain error between the measurement result and the true value, and there is also a problem of large consistency error in repeated measurements. In the V-support measurement method, a V-support is used to rotate the part for measurement, but the part is prone to axial movement and rotation discontinuity, which has a great impact on the measurement results. Utility Model Content

[0004] The purpose of the utility model is to provide an engine bearing seat detection device in view of the defects existing in the prior art, wherein a positioning plate is used to form an inclined bearing surface of the end face of a bearing part to constrain the axial position of the part, two fixed positioning columns are combined with a movable positioning column to form a positioning structure with a variable common inscribed circle, so that the fixed positioning column and the movable positioning column are in contact with the positioning hole of the part together, forming a three-point positioning of the positioning hole of the part, forming a radial constraint on the part, and the part changes its posture through circumferential rotation to meet the positioning and bearing requirements of the part when measuring runout, flatness, and cylindricity of the journal, thereby improving the measurement efficiency and measurement accuracy.

[0005] In order to achieve the above purpose, the following technical solutions are adopted:

[0006] An engine bearing seat detection device, comprising:

[0007] The support platform is provided with a positioning plate, and the top of the positioning plate forms an inclined bearing surface;

[0008] A fixed positioning member, comprising two fixed positioning columns that are spaced apart and installed on the positioning plate, wherein the axes of the fixed positioning columns are perpendicular to the bearing surface;

[0009] The adjustment component includes a movable positioning column, a transmission rod and an adjustment mechanism. One end of the transmission rod is hinged to the casing through a pin shaft, and the other end is connected to the movable positioning column. At least one end of the movable positioning column passes through the positioning plate and extends above the bearing surface. The casing and the adjustment mechanism are respectively installed on the support platform. The output end of the adjustment mechanism is hinged to the transmission rod to drive the transmission rod to swing around the pin shaft. The movable positioning column and the two fixed positioning columns are non-collinearly distributed.

[0010] Furthermore, the adjustment assembly also includes a mounting plate, which is fixed on a support platform below the positioning plate, and the adjustment mechanism and the casing are respectively connected to the mounting plate.

[0011] Furthermore, the adjustment mechanism includes a handle, a screw, a spring and an adjustment rod connected in sequence, one end of the spring is provided with a nut matching the screw, and the other end is connected to the adjustment rod through a washer, the end of the adjustment rod is hinged to the transmission rod as the output end of the adjustment mechanism, the non-threaded section of the screw is rotatably connected to the first support, and the second support is provided with a through hole for the adjustment rod to pass through.

[0012] Furthermore, the protective sleeve is sleeved outside the transmission rod, and the output end of the adjustment mechanism passes through the protective sleeve and is hinged to the transmission rod.

[0013] Furthermore, the positioning plate is provided with a through hole for the movable positioning post to pass through, and the diameter of the through hole is larger than the diameter of the movable positioning post.

[0014] Furthermore, the support platform includes a connected support frame and a support plate, the support plate is inclined, and the positioning plate is fixed to the support plate.

[0015] Furthermore, the adjustment mechanism is connected to the bottom surface of the support plate, and the operating end of the adjustment mechanism extends beyond the bottom surface of the support plate.

[0016] Furthermore, the fixed positioning column and the movable positioning column are respectively equipped with bearings, and the outer circumferential surface of the bearing is used to form an inscribed portion with the positioning hole of the part.

[0017] Furthermore, the movable positioning column is located on a perpendicular bisector of a line connecting two fixed positioning columns.

[0018] Furthermore, along the inclined direction of the bearing surface, the movable positioning columns are distributed below the two fixed positioning columns.

[0019] Compared with the prior art, the utility model has the following advantages and positive effects:

[0020] (1) In view of the problem that the corresponding detection bearing equipment is difficult to meet the demand during workpiece measurement, a positioning plate is used to form an inclined bearing surface of the bearing part end face to constrain the axial position of the part. Two fixed positioning columns are combined with a movable positioning column to form a positioning structure with a variable common inscribed circle, so that the fixed positioning column and the movable positioning column contact the positioning hole of the part together to form a three-point positioning of the part positioning hole, forming a radial constraint on the part. The part changes its posture through circumferential rotation, which meets the positioning and bearing requirements of the part when measuring runout, flatness, and journal cylindricity, thereby improving measurement efficiency and measurement accuracy.

[0021] (2) The position of the movable positioning column is changed by driving the adjustment mechanism, and the two fixed positioning columns are combined with the movable positioning column to form a positioning structure with a variable common inscribed circle, thereby adapting to positioning holes of different sizes and improving its versatility.

[0022] (3) Bearings are respectively provided on the movable positioning column and the fixed positioning column to reduce the scratching and wear of the positioning column on the positioning hole of the part when adjusting the position of the part, thereby improving the positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0024] Figure 1 It is a schematic diagram of the engine bearing seat detection device in the embodiment of the utility model.

[0025] Figure 2 It is a top view schematic diagram of the engine bearing seat detection device in the embodiment of the utility model.

[0026] Figure 3 It is a schematic diagram of a support platform of an engine bearing seat detection device in an embodiment of the utility model.

[0027] Figure 4 It is a schematic diagram of the adjustment component of the engine bearing seat detection device in the embodiment of the utility model.

[0028] In the figure, 1. support table, 2. adjustment component, 3. positioning plate, 4. parts, 5. through hole, 6. movable positioning column, 7. fixed positioning column, 8. bottom plate, 9. first pillar, 10. second pillar, 11. support rod, 12. support plate, 13. handle, 14. screw, 15. first support, 16. second support, 17. casing, 18. mounting plate, 19. transmission rod, 20. pin, 21. washer, 22. spring, 23. nut. DETAILED DESCRIPTION

[0029] In a typical implementation of the present invention, Figure 1-Figure 4 As shown, an engine bearing seat detection device is proposed.

[0030] At present, when measuring the end face runout, flatness and journal cylindricity of the bearing seat, the detection equipment used has poor support effect on the part 4 to be inspected, and the part 4 is prone to positional displacement, resulting in measurement accuracy that is difficult to meet the requirements. Based on this, an engine bearing seat detection device is provided in this embodiment, which uses an inclined bearing surface to abut the end face of the part 4 to be inspected to achieve axial constraint, and uses a movable positioning column 6 and a fixed positioning column 7 to cooperate with the positioning hole of the part 4 to be inspected, and the radial position of the positioning hole is constrained by a three-point circle, thereby achieving radial and axial constraints on the part 4 to be inspected, reducing its uncontrollable movement during the detection process, and no constraints are imposed on the part 4 in the circumferential direction, and the measurement position can be adjusted by rotating the part 4 to improve the measurement efficiency.

[0031] See also Figure 1 The engine bearing seat detection device mainly includes a support platform 1, a fixed positioning member and an adjustment component 2. The support platform 1 serves as a bearing structure, and the fixed positioning member and the adjustment component 2 are respectively installed on the support platform 1.

[0032] A positioning plate 3 is provided on the support platform 1, and the positioning plate 3 can abut against the end face of the part to be tested 4, and an inclined bearing surface is formed on the top of the positioning plate 3; the fixed positioning member includes two fixed positioning columns 7 that are spaced and installed on the positioning plate 3, and the fixed positioning column 7 is cylindrical, and the axis of the fixed positioning column 7 is perpendicular to the bearing surface; the adjustment component 2 includes a movable positioning column 6, a transmission rod 19 and an adjustment mechanism, one end of the transmission rod 19 is hinged to the casing 17 through a pin 20, and the other end is connected to the movable positioning column 6, at least one end of the movable positioning column 6 passes through the positioning plate 3 and extends above the bearing surface, the movable positioning column 6 and the two fixed positioning columns 7 are non-collinearly distributed, and can form an abutment from the inner side of the positioning hole of the part to be tested 4, thereby utilizing the three-point circle determination principle to realize the constraint of the radial position of the positioning hole.

[0033] The casing 17 and the adjustment mechanism are respectively installed on the support platform 1. The output end of the adjustment mechanism is hinged to the transmission rod 19 to drive the transmission rod 19 to swing around the pin 20. When the transmission rod 19 swings along the pin 20, the movable positioning column 6 connected to the transmission rod 19 also changes position, and the distance between the movable positioning column 6 and the fixed positioning column 7 changes, so that the size of the circumscribed circle jointly determined by the movable positioning column 6 and the fixed positioning column 7 changes to adapt to positioning holes of different sizes.

[0034] like Figure 2As shown, in order to ensure the smoothness of the part 4 when it rotates to adjust its posture, the fixed positioning column 7 and the movable positioning column 6 are respectively equipped with bearings, and the outer circumferential surface of the bearing is used to form an inscribed surface with the positioning hole of the part 4, so that the outer ring of the bearing contacts the positioning hole of the part 4. When the part 4 rotates to adjust its posture, rolling friction is formed between the outer ring of the bearing and the inner wall of the positioning hole of the part 4, thereby reducing scratches and damage to the inner wall of the positioning hole and improving the smoothness of rotation.

[0035] The movable positioning column 6 is located on the perpendicular bisector of the line connecting the two fixed positioning columns 7. Along the inclined direction of the bearing surface, the distribution position of the movable positioning column 6 is located below the two fixed positioning columns 7. After the part 4 is placed on the bearing surface, the positioning hole first contacts the two fixed positioning columns 7 which are in a relatively upper position. The inclined bearing surface causes the part 4 to droop naturally under its own weight, and the part 4 is in a hanging state along the inclined bearing surface. A self-centering effect is formed under the action of the fixed positioning columns 7 and gravity, and the movable positioning column 6 which is relatively in a lower position is used to abut against another point on the inner wall of the positioning hole to constrain the radial position of the workpiece.

[0036] By fixing the positioning column 7 and the movable positioning column 6 to abut and position the inner wall of the positioning hole of the workpiece, the working state of the part 4 when rotating on the equipment is simulated, thereby faithfully reflecting the shaft diameter runout of the part 4 during the actual operation, and being able to use the fit with the bearing surface on the positioning plate 3 to reflect the form and position tolerance of the fitting surface, and in the process of repeated measurement of parts 4 such as bearing seats and camshafts, the part 4 can rotate smoothly, and the form and position tolerance of the part 4 can be truly reflected.

[0037] In this embodiment, the bearing adopts a high-precision rolling bearing, and the angle of the inclined bearing surface of the positioning plate 3 relative to the horizontal plane is 15°. In other optional embodiments, the bearing can also be selected from other bearings that meet the precision requirements, and the inclination angle of the bearing surface on the positioning plate 3 can be adjusted according to demand.

[0038] like Figure 2 and Figure 4 As shown, the adjustment mechanism for driving the movable positioning column 6 to operate and the transmission rod 19 for carrying the movable positioning column 6 are described in detail.

[0039] The adjustment assembly 2 also includes a mounting plate 18, which is fixed on the support platform 1 below the positioning plate 3. The adjustment mechanism and the casing 17 are respectively connected to the mounting plate 18. Specifically, the adjustment mechanism includes a handle 13, a screw rod 14, a spring 22 and an adjustment rod connected in sequence. One end of the spring 22 is provided with a nut 23 that matches the screw rod 14, and the other end is connected to the adjustment rod through a washer 21. The end of the adjustment rod is hinged to the transmission rod 19 as the output end of the adjustment mechanism. The non-threaded section of the screw rod 14 is rotatably connected to the first support 15, and the second support 16 is provided with a through hole for the adjustment rod to pass through.

[0040] The handle 13 drives the screw 14 to rotate, and the axial position of the screw 14 and the first support 15 does not change, while the axial position between the screw 14 and the nut 23 changes, so that the spring 22 pushes or pulls the adjusting rod to move, thereby adjusting the position of the transmission rod 19, and then changing the position of the movable positioning column 6 above the transmission rod 19. The diameter of the circle positioned by the movable positioning column 6 and the fixed positioning column 7 changes to match positioning holes of different sizes.

[0041] The spring 22 is used as an intermediate transmission element. When the movable positioning column 6 is subjected to external collision or excessive force, the spring 22 is stretched or compressed, so that the position of the movable positioning column 6 changes, thereby protecting the movable positioning column 6. In addition, after the movable positioning column 6 contacts the positioning hole of the measured part 4, the spring 22 can be used to form a pre-pressure, forming a radial pressure effect on the positioning hole, which is conducive to maintaining the position of the part 4.

[0042] In addition, during the swinging process of the transmission rod 19, the adjustment rod connected to it will also change accordingly. The movement of the hinged position of the adjustment rod and the transmission rod 19 is an arc track. Therefore, the adjustment rod has the movement along its axial direction and along its radial direction, so that the tilt state of the adjustment rod changes. In this regard, the second support 16 in this embodiment plays a restraining role on the adjustment rod. The diameter of the through hole on the second support 16 is larger than the diameter of the adjustment rod, so that the tilt state of the adjustment rod changes, and plays a supporting role on the adjustment rod when the adjustment rod contacts the through hole. In addition, the bending deformation of the spring 22 is used to absorb the angle change of the adjustment rod, so as to keep the tilt state of the axis of the screw rod 14 unchanged.

[0043] The casing 17 is sleeved outside the transmission rod 19 to form a rotation support for the transmission rod 19. The output end of the adjustment mechanism passes through the casing 17 and is hinged to the transmission rod 19. The rotation of the handle 13 drives the transmission rod 19 in the casing 17 to swing back and forth.

[0044] The positioning plate 3 is provided with a through hole 5 for the movable positioning column 6 to pass through. The diameter of the through hole 5 is larger than the diameter of the movable positioning column 6 , thereby providing a movable space for the adjustment of the movable positioning column 6 .

[0045] like Figure 3 As shown, the support platform 1 includes a connected support frame and a support plate 12, the support plate 12 is tilted, the positioning plate 3 is fixed to the support plate 12, the support frame includes a base plate 8 located at the bottom, a group of first pillars 9 and a group of second pillars 10 are provided on the base plate 8, a support rod 11 is connected between the first pillars 9 and the second pillars 10, the height of the first pillar 9 is lower than the height of the second pillar 10, so that the support rod 11 is in an inclined state, the support plate 12 is carried on the support rod 11, so that the support plate 12 is also in an inclined state, and the positioning plate 3 and the support plate 12 are connected by fasteners such as bolts.

[0046] In this embodiment, the support platform 1 uses relatively low-cost square steel pipes as the first pillar 9 and the second pillar 10, and uses Q235-B flat plates as the bottom plate 8 and the support plate 12. The support platform 1 is formed by welding.

[0047] The adjustment mechanism is connected to the bottom surface of the support plate 12, and the operating end of the adjustment mechanism extends beyond the bottom surface of the support plate 12 to facilitate the adjustment operation. The positioning hole can be a preset stop on the part 4, or a shaft hole.

[0048] A positioning plate 3 is used to form an inclined bearing surface for the end face of the bearing part 4 to constrain the axial position of the part 4. Two fixed positioning columns 7 are combined with a movable positioning column 6 to form a positioning structure with a variable common inscribed circle, so that the fixed positioning column 7 and the movable positioning column 6 contact the positioning hole of the part 4 together, forming a three-point positioning of the positioning hole of the part 4, forming a radial constraint on the part 4, and the part 4 changes its posture through circumferential rotation to meet the positioning and bearing requirements of the part 4 when measuring the runout, flatness, and journal cylindricity, thereby improving the measurement efficiency and measurement accuracy.

[0049] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An engine bearing seat detection device, characterized in that: include: The support platform is provided with a positioning plate, and the top of the positioning plate forms an inclined bearing surface; The fixed positioning part includes two fixed positioning columns that are spaced apart and installed on the positioning plate, and the axes of the fixed positioning columns are perpendicular to the bearing surface; the adjusting component includes a movable positioning column, a transmission rod and an adjusting mechanism, one end of the transmission rod is hinged to the casing through a pin, and the other end is connected to the movable positioning column, at least one end of the movable positioning column passes through the positioning plate and extends above the bearing surface, the casing and the adjusting mechanism are respectively installed on the support platform, the output end of the adjusting mechanism is hinged to the transmission rod to drive the transmission rod to swing around the pin, and the movable positioning column and the two fixed positioning columns are non-collinearly distributed.

2. The engine bearing seat detection device according to claim 1, characterized in that: The adjustment assembly also includes a mounting plate, which is fixed on a support platform below the positioning plate, and the adjustment mechanism and the casing are respectively connected to the mounting plate.

3. The engine bearing seat detection device according to claim 2, characterized in that: The adjustment mechanism includes a handle, a screw, a spring and an adjustment rod connected in sequence. One end of the spring is provided with a nut matching the screw, and the other end is connected to the adjustment rod through a washer. The end of the adjustment rod is hinged to the transmission rod as the output end of the adjustment mechanism. The non-threaded section of the screw is rotatably connected to the first support, and the second support is provided with a through hole for the adjustment rod to pass through.

4. The engine bearing seat detection device according to claim 1, 2 or 3, characterized in that: The protective sleeve is sleeved outside the transmission rod, and the output end of the adjustment mechanism passes through the protective sleeve and is hinged to the transmission rod.

5. The engine bearing seat detection device according to claim 4, characterized in that: The positioning plate is provided with a through hole for the movable positioning column to pass through, and the diameter of the through hole is larger than the diameter of the movable positioning column.

6. The engine bearing seat detection device according to claim 1, characterized in that: The support platform comprises a connected support frame and a support plate, the support plate is inclined, and the positioning plate is fixed to the support plate.

7. The engine bearing seat detection device according to claim 6, characterized in that: The adjusting mechanism is connected to the bottom surface of the supporting plate, and the operating end of the adjusting mechanism extends beyond the bottom surface of the supporting plate.

8. The engine bearing seat detection device according to claim 1, characterized in that: The fixed positioning column and the movable positioning column are respectively matched with bearings, and the outer circumferential surface of the bearing is used to form an internal cut with the positioning hole of the part.

9. The engine bearing seat detection device according to claim 1 or 8, characterized in that: The movable positioning column is located on the perpendicular bisector of the line connecting the two fixed positioning columns.

10. The engine bearing seat detection device according to claim 9, characterized in that: Along the inclined direction of the bearing surface, the movable positioning columns are distributed below the two fixed positioning columns.

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