Crankshaft flat thickness detection device

Abstract

The utility model relates to the technical field of crankshaft machining detection equipment provides a kind of crankshaft flat square thickness detection device, including base, support seat, top plate and micrometer, support seat is fixedly connected in base side, top plate is slidably connected with support seat, micrometer is fixedly installed on top plate. Top plate and support seat are slidably connected by screw rod transmission component, the component includes transversely arranged worm, longitudinally arranged first screw rod and second screw rod, first screw rod and second screw rod are all drivenly connected with worm. Worm is installed in the inside mounting groove of support seat bottom side, first, second screw rod is symmetrically distributed, one end is inserted into support seat and is engaged with worm by turbine, the other end extends to support seat outside and is respectively connected first, second sliding seat, two sliding seats are all fixed with top plate. Screw rod transmission component further includes the knob of driving worm, knob is located in support seat outside. The device can be quickly adapted to different sizes of crankshaft flat square detection, accurate measurement is realized through micrometer, and detection efficiency and accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of crankshaft processing and testing equipment, specifically to a crankshaft flatness thickness testing device. Background Technology

[0002] In the crankshaft manufacturing industry, the flat rectangular structure of the crankshaft small-end journal is a critical mating part, and its thickness accuracy directly affects the assembly compatibility of the crankshaft with subsequent transmission components and the overall operational stability. Currently, the industry commonly uses micrometers for manual measurement of the thickness of the flat rectangular structure of the small-end journal. However, due to the stringent thickness tolerance requirements of this type of flat rectangular structure (typically within a tolerance range of only 0.04mm), conventional calipers are unsuitable because they cannot meet the accuracy requirements for measuring such minute tolerances.

[0003] However, the use of micrometers for measurement also has significant technical drawbacks: on the one hand, the measurement process requires operators to adjust the position of the micrometer multiple times to align it with the flat inspection surface, and each measurement takes a long time. Coupled with the adjustment steps for adapting to multiple specifications, it is even more difficult to adapt to the high-efficiency inspection needs of large-volume, multi-specification crankshaft production scenarios; on the other hand, micrometer readings rely on the operator's manual identification of the scale, which is easily affected by human factors such as visual errors and hand tremors, and there is a risk of misreading, which leads to unqualified products flowing into subsequent processes, increasing production rework costs and the difficulty of quality control.

[0004] To address the aforementioned efficiency and accuracy issues, the industry urgently needs a specialized device capable of rapidly and accurately detecting the thickness of crankshaft flat sections. This would compensate for the shortcomings of existing micrometer measurement methods, meet the inspection requirements of small-tolerance flat section structures, and ensure crankshaft production quality and processing efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a crankshaft journal thickness detection device to achieve rapid and accurate detection of the journal thickness of crankshafts of different specifications, and to solve the problems of low efficiency and easy misreading of existing journal thickness measurement methods.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A crankshaft flatness thickness measuring device includes a base, a support, a top plate, and a dial indicator. The support is fixedly connected to one side of the base, the top plate is disposed above the support and slidably connected to the support, and the dial indicator is detachably mounted on the top plate and is located on the side of the base away from the support.

[0007] Preferably, the top plate and the support base are slidably connected via a screw drive assembly; the screw drive assembly includes a worm gear arranged laterally, and a first screw and a second screw arranged longitudinally, both of which are drivenly connected to the worm gear.

[0008] Preferably, the worm gear is installed in the internal mounting groove on the bottom side of the support base; the first lead screw and the second lead screw are symmetrically distributed, and one end of each of them extends into the interior of the support base and is meshed with the worm gear through a worm wheel for transmission, and the other end extends to the outside of the support base and is threadedly connected to the first sliding seat and the second sliding seat respectively; the first sliding seat and the second sliding seat are both fixedly connected to the top plate.

[0009] Preferably, the lead screw drive assembly further includes a knob for driving the worm gear to rotate, the knob being located on the outside of the support base and fixedly connected to one end of the worm gear.

[0010] Preferably, the first sliding seat and the second sliding seat are at the same horizontal height.

[0011] Preferably, the top plate is provided with a positioning hole for mounting the dial indicator, and one end of the fixing rod of the dial indicator passes through the positioning hole and is threadedly connected to the positioning hole.

[0012] Preferably, the probe of the dial indicator extends in a direction perpendicular to the plane of the top plate, and the axis of the probe is perpendicularly aligned with the detection surface of the crankshaft flattened surface to be tested.

[0013] The beneficial effects of this utility model are as follows: the top plate is driven by the screw transmission assembly on the support base to adjust the vertical height of the top plate relative to the base, which can adapt to the flatness detection needs of crankshafts of different sizes and solve the limitations of single-specification detection tools; at the same time, with the dial indicator fixed on the top plate, it can quickly align with the detection surface of the crankshaft flatness and directly read high-precision values, reducing human error. In addition, the overall adjustment is convenient and the positioning is stable, taking into account the versatility, efficiency and accuracy of detection, and is suitable for quality control in mass production scenarios. Attached Figure Description

[0014] Figure 1 This is a side view of the crankshaft flatness thickness detection device in this embodiment. Figure 2 This is a front view structural schematic diagram of the crankshaft flatness thickness detection device in this embodiment; Figure 3 This is a cross-sectional structural diagram showing the cooperation between the top plate and the support base in this embodiment.

[0015] Reference numerals: 10-Dial indicator, 11-Fixed rod, 12-Probe, 13-Dial, 14-Lifting rod, 20-Top plate, 30-Base, 40-Support seat, 50-Screw drive assembly, 51-Worm gear, 52-First screw, 53-Second screw, 54-Worm wheel, 55-First sliding seat, 56-Second sliding seat, 57-Knob. Detailed Implementation

[0016] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0017] Example 1 like Figures 1 to 3 As shown in the figure, this embodiment discloses a crankshaft flatness thickness detection device, including a base 30, a support 40, a top plate 20, and a dial indicator 10. The support 40 is fixedly connected to one side of the base 30, the top plate 20 is slidably connected to the support 40, and the dial indicator 10 is fixedly installed on the top plate 20. The base 30 provides support for the entire device, the support 40 provides a mounting base for the various components of the device, and the dial indicator 10 is used to detect the thickness of the crankshaft flatness.

[0018] The top plate 20 and the support base 40 are slidably connected by a screw drive assembly 50. The screw drive assembly 50 includes a worm gear 51 arranged laterally and a first screw 52 and a second screw 53 arranged longitudinally. Both the first screw 52 and the second screw 53 are connected to the worm gear 51 in a transmission connection. The worm gear 51 is installed in an internal mounting groove on the bottom side of the support base 40, constituting the power input component of the transmission system. The first lead screw 52 and the second lead screw 53 are symmetrically distributed. One end of each of them extends into the support base 40 and is meshed with the worm 51 through a worm wheel 54. When the worm 51 rotates, it can drive the worm wheel 54 to rotate synchronously and drive the first lead screw 52 and the second lead screw 53 to rotate synchronously. The other ends of both extend to the outside of the support base 40 and are respectively connected to the first sliding seat 55 and the second sliding seat 56. The first sliding seat 55 and the second sliding seat 56 are both fixedly connected to the top plate 20. Through the transmission cooperation between the lead screw and the sliding seat, the rotational motion of the lead screw can be converted into the linear sliding of the top plate 20, so as to realize the adjustment of the height position of the top plate 20 to adapt to the testing requirements of crankshafts of different sizes.

[0019] The lead screw drive assembly 50 also includes a knob 57 for driving the worm gear 51 to rotate. The knob 57 is located on the outside of the support base 40 and is fixedly connected to one end of the worm gear 51. Rotating the knob 57 drives the worm gear 51 to rotate, thereby starting the entire transmission system. The first sliding seat 55 and the second sliding seat 56 are at the same horizontal height to ensure that the top plate 20 remains horizontal during sliding, thus ensuring detection accuracy.

[0020] The top plate 20 has a positioning hole for mounting a dial indicator 10. One end of the fixing rod 11 of the dial indicator 10 passes through the positioning hole and forms a threaded connection with it, thus ensuring a stable mounting of the dial indicator 10 on the top plate 20. The probe 12 of the dial indicator 10 extends in a direction perpendicular to the plane of the top plate 20, and the axis of the probe 12 is perpendicular to the detection surface of the crankshaft flat surface to be tested, ensuring that the probe 12 can accurately contact the detection surface and transmit thickness information. During testing, the top plate 20 is adjusted to a suitable height by rotating the knob 57, and the probe 12 contacts the detection surface of the crankshaft flat surface. The dial indicator 10 displays the thickness value on the dial 13 based on the displacement of the probe 12, completing the testing operation.

[0021] Its specific working principle is as follows: Before testing, a standard flat bar of the corresponding size must be selected as a reference part according to the preset specifications of the crankshaft flat bar to be tested. Place the standard flat bar stably on the base 30, with its testing surface facing upward and its center area directly below the probe 12. At this time, the worm gear 51 is driven to rotate by rotating the knob 57. Through the meshing transmission between the worm wheel 54 and the worm gear 51, the first lead screw 52 and the second lead screw 53 are driven to rotate synchronously, so that the first sliding seat 55 and the second sliding seat 56 drive the top plate 20 to move slowly along the lead screw axis until a gap of 2-3mm is left between the probe 12 of the dial indicator 10 and the testing surface of the standard flat bar. Then, stop adjusting the knob 57. Subsequently, operate the lifting rod 14 at the top of the dial indicator 10 to pull it upward, causing the probe 12 to retract upward against the internal spring force. After the probe 12 is fully raised, slowly release the lifting rod 14, allowing the probe 12 to fall naturally under the action of the spring force and lightly touch the detection surface of the standard flat square. At this time, observe the dial 13 of the dial indicator 10, and zero the pointer by rotating the adjustment structure of the outer ring of the dial 13, thus completing the reference calibration of the device.

[0022] During formal testing, there is no need to adjust knob 57 again to change the height of top plate 20. Simply pull up lever 14 to raise probe 12, remove the standard flat piece, and place the crankshaft to be tested on base 30, ensuring that the testing surface of the crankshaft flat piece faces upward and its position is consistent with the placement position of the standard flat piece, i.e., the center of the testing surface is directly opposite the axis of probe 12. Slowly release lever 14 so that probe 12 contacts the testing surface of crankshaft flat piece under the action of spring force. At this time, the value of the pointer of dial indicator 10 deviating from zero is the thickness deviation of the flat piece to be tested relative to the standard part.

[0023] When it is necessary to change to a different specification of crankshaft flat sheet for inspection, first separate the probe 12 from the currently inspected workpiece by lifting the lifting rod 14 and remove the inspected crankshaft. Based on the thickness range of the new specification crankshaft flat sheet, rotate the knob 57 to adjust the height of the top plate 20 to maintain a suitable gap between the probe 12 and the new specification standard flat sheet; place the new specification standard flat sheet in the workpiece, and repeat the above lifting rod 14 operation and dial 13 zeroing steps to complete the new specification reference setting. Afterwards, by following the same lifting rod, placing workpiece, and releasing rod process, continuous inspection of the new specification crankshaft flat sheet can be performed.

[0024] In summary, this embodiment achieves adaptive adjustment of the height of the top plate 20 through the lead screw drive assembly 50. Combined with the quick operation of the lifting rod 14 and the standard parts calibration mechanism, it not only ensures accurate detection of crankshaft flat squares of different specifications, but also simplifies the operation process and effectively improves detection efficiency and measurement accuracy.

[0025] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A crankshaft flatness thickness detection device, characterized in that, It includes a base, a support, a top plate, and a dial indicator. The support is fixedly connected to one side of the base, the top plate is located above the support and slidably connected to the support, and the dial indicator is detachably mounted on the top plate and is located on the side of the base away from the support.

2. The crankshaft flatness thickness detection device according to claim 1, characterized in that, The top plate and the support base are slidably connected by a screw drive assembly; the screw drive assembly includes a worm gear arranged laterally, and a first screw and a second screw arranged longitudinally, both of which are connected to the worm gear drive.

3. The crankshaft flatness thickness detection device according to claim 2, characterized in that, The worm gear is installed in the internal mounting groove on the bottom side of the support base; the first lead screw and the second lead screw are symmetrically distributed, and one end of each of them extends into the interior of the support base and is meshed with the worm gear through a worm wheel for transmission, and the other end extends to the outside of the support base and is threadedly connected to the first sliding seat and the second sliding seat respectively; the first sliding seat and the second sliding seat are both fixedly connected to the top plate.

4. The crankshaft flatness thickness detection device according to claim 3, characterized in that, The lead screw drive assembly also includes a knob for driving the worm gear to rotate. The knob is located on the outside of the support base and is fixedly connected to one end of the worm gear.

5. The crankshaft flatness thickness detection device according to claim 3, characterized in that, The first sliding seat and the second sliding seat are at the same horizontal height.

6. The crankshaft flatness thickness detection device according to claim 1, characterized in that, The top plate is provided with a positioning hole for mounting the dial indicator, and one end of the fixing rod of the dial indicator passes through the positioning hole and is threaded into the positioning hole.

7. The crankshaft flatness thickness detection device according to claim 1, characterized in that, The probe of the dial indicator extends in a direction perpendicular to the plane of the top plate, and the axis of the probe is perpendicularly aligned with the detection surface of the crankshaft flattened surface to be tested.

Images