Universal drill hole center distance quick detection tool

Abstract

This utility model provides a universal rapid inspection tool for the center distance of drilled curved holes, relating to the field of machining inspection technology. It includes: a base plate; a base is mounted on the base plate by screws; a partition plate is mounted on the upper end of the base plate; a through groove is provided on the partition plate; a seat plate is fixed to the lower end of the partition plate; a movable plate that can move back and forth is installed in the through groove of the partition plate; a fixed seat is fixed on the movable plate; a first hydraulic rod is fixedly mounted on the fixed seat; the piston rod of the first hydraulic rod is fixedly connected to the seat plate; a sliding plate that can slide back and forth is mounted on the partition plate; the movable plate is connected to the right side of the sliding plate by bolts; and a support is fixed on the partition plate. This utility model significantly improves inspection efficiency and accuracy through innovative design. The hydraulically driven movable plate and lifting plate achieve rapid positioning, and with real-time readings from a dial indicator, the inspection time for a single piece is shortened to within 30 seconds, improving efficiency by 5-10 times compared to traditional coordinate measuring machines. The standardized process is suitable for online inspection on production lines.

Description

Technical Field

[0001] This utility model relates to the field of mechanical processing and testing technology, and in particular to a general-purpose rapid inspection tool for the center distance of drilled curved holes. Background Technology

[0002] In the machining of crankshaft parts, the center distance of the crank holes is a critical dimensional parameter that directly affects the assembly accuracy and operational performance of equipment such as engines. Crankshafts are widely used in the automotive, shipbuilding, and aerospace industries, and the accuracy requirement for the center distance of their crank holes is typically within ±0.05mm, with some high-end products even requiring ±0.02mm. Therefore, in mass production, the rapid and accurate detection of the center distance of the crank holes is a key step in ensuring product quality. This leads to the design of a universal rapid inspection tool for drilling crank hole center distances.

[0003] Traditional coordinate measuring machines (CMMs) have low efficiency in inspecting single workpieces, making it difficult to meet the needs of online inspection on production lines in mass production. This can easily lead to a backlog of workpieces during the inspection process, slowing down the overall production cycle, and failing to meet the precision requirements for the machining of crankshaft-type parts. Utility Model Content

[0004] This utility model embodiment relates to a universal quick inspection tool for the center distance of drilled curved holes, in order to solve the technical problems mentioned in the background art.

[0005] In a first aspect, this utility model provides a universal quick inspection tool for the center distance of drilled curved holes, specifically comprising: a base plate; a base mounted on the base plate by screws, a partition plate mounted on the upper end of the base plate, a through groove provided on the partition plate, a seat plate fixed to the lower end of the partition plate, a movable plate that can move back and forth installed in the through groove of the partition plate, a fixed seat fixed on the movable plate, a first hydraulic rod fixedly mounted on the fixed seat, the piston rod of the first hydraulic rod being fixedly connected to the seat plate, a sliding plate that can slide back and forth mounted on the partition plate, and the movable plate being connected to the right side of the sliding plate by bolts. Next, a support is fixed on the partition, and a back plate is bolted to the support. A movable plate is installed on the back plate, and a second hydraulic rod is installed on the movable plate. A connecting plate is fixedly installed at the lower end of the piston rod of the second hydraulic rod. A lifting plate is set below the connecting plate. A sliding groove is set on the lifting plate, and toothed plates are fixed on the inner walls of the front and rear ends of the sliding groove. A left-right movable upper center is installed in the sliding groove of the lifting plate. A gear is fixed at the upper end of the upper center. The gear meshes with two toothed plates respectively. A spring is movably sleeved on the upper center, and the spring is located below the lifting plate.

[0006] Furthermore, the lower end of the base plate is provided with four threaded holes, and each of the four threaded holes is threaded with a leveling foot. Handles are installed on both the left and right sides of the base, and hinge seats are fixedly installed on both the left and right ends of the base. A handle is installed on the hinge seat through a pin, and a hanging ring is installed on the handle. Hook seats that cooperate with the hanging ring are installed on both the left and right sides of the partition.

[0007] Furthermore, the rear end of the partition is mounted on the base via a hinge, and a hinge arm is installed between the partition and the base.

[0008] Furthermore, the sliding plate is provided with a waist-shaped groove, and a lower center is installed in the waist-shaped groove.

[0009] Furthermore, a rectangular mounting groove is provided at the lower end of the sliding plate, a cylindrical seat is fixedly installed in the rectangular mounting groove, a bottom cover is installed at the lower end of the cylindrical seat by bolts, a conical spring is installed at the upper end of the bottom cover, a circular plate is fixedly installed at the upper end of the conical spring, and a curved hole positioning core is fixedly installed at the upper end of the circular plate, with the curved hole positioning core extending from the upper end of the sliding plate.

[0010] Furthermore, the movable plate is provided with a waist-shaped groove, and two linear bearings are installed on the connecting plate. Guide rods are installed inside the two linear bearings, and the lifting plate is fixed to the lower end of the two guide rods.

[0011] Furthermore, a fixing rod is fixedly installed on the partition, and a locking seat is locked onto the fixing rod by bolts. A dial indicator is locked onto the locking seat by bolts, and the probes of the dial indicator are in contact with the front end of the sliding plate.

[0012] This utility model provides a universal quick inspection tool for the center distance of drilled curved holes, which has the following beneficial effects:

[0013] In terms of inspection efficiency, this invention achieves rapid positioning through a hydraulically driven moving plate and lifting plate, combined with real-time readings from a dial indicator. The inspection time for a single piece can be shortened to within 30 seconds, which is 5-10 times more efficient than traditional coordinate measuring machines. Furthermore, the standardized operating procedure is particularly suitable for online inspection on production lines, reducing the backlog of items to be inspected and effectively improving production cycle time. In terms of measurement accuracy, the combination of linear guide rails and hydraulic drive system ensures that the coaxiality error between the upper and lower centers is ≤0.02mm, meeting the precision machining requirements of crankshaft-type parts.

[0014] Furthermore, in this invention, the engagement and locking between the gear and the toothed plate can be released by pushing the upper center upwards. The upper center can then be moved directly to the target position within the slide groove. After adjustment, the upper center is released, and the gear automatically resets under the action of the spring and re-engages with the toothed plate. The entire process is simple and quick, avoiding the tedious steps of repeatedly tightening tools required by traditional bolt-locking adjustments. This significantly improves the adaptability of the inspection tool to different workpiece models. At the same time, the engagement and locking method between the gear and the toothed plate ensures the stability of the upper center position after adjustment. Combined with the guiding effect of the waist-shaped groove, it reduces measurement deviations caused by positional loosening. While improving adjustment flexibility, it also ensures measurement stability, making the inspection tool more efficient and reliable in dealing with diverse testing needs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0016] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0017] In the attached diagram:

[0018] Figure 1 A schematic diagram of the overall structure of this application is shown.

[0019] Figure 2 This application shows Figure 1 A magnified structural diagram of part A in the middle.

[0020] Figure 3 A schematic diagram of the structure of the lower part of the partition in this application is shown.

[0021] Figure 4 A schematic diagram of the sliding plate of this application is shown.

[0022] Figure 5 This application shows Figure 1 A magnified structural diagram of part B.

[0023] Figure 6 A schematic diagram of the structure of the cylinder seat portion of this application is shown.

[0024] Figure 7 A schematic diagram of the landing gear of this application is shown.

[0025] Figure 8 This application shows Figure 7 A magnified structural diagram of section C.

[0026] Figure 9 A structural schematic diagram of the fixing rod portion of this application is shown.

[0027] List of reference numerals

[0028] 1. Base plate; 11. Leveling feet; 12. Base; 121. Handle; 122. Hinge seat; 1221. Handle; 1222. Hanging ring; 13. Partition plate; 131. Hook seat; 132. Hinge arm; 133. Seat plate; 134. Moving plate; 135. Fixed seat; 1351. First hydraulic rod; 14. Sliding plate; 141. Lower center; 142. Bottom cover; 1421. Conical spring; 1422. Circular plate; 1423. Curved hole positioning core; 1424. Cylinder seat; 2. Support; 21. Back plate; 22. Movable plate; 221. Second hydraulic rod; 222. Connecting plate; 223. Linear bearing; 2231. Guide rod; 23. Lifting plate; 231. Toothed plate;

[0029] 232. Top center; 233. Gear; 15. Fixing rod; 151. Locking seat; 152. Dial indicator. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] Please refer to Figures 1 to 9 Example 1:

[0032] This utility model proposes a universal quick inspection tool for the center distance of drilled curved holes, comprising: a base plate 1; a base 12 mounted on the base plate 1 by screws, a partition 13 mounted on the upper end of the base 12, a through groove provided on the partition 13, a seat plate 133 fixed to the lower end of the partition 13, a movable plate 134 that can move back and forth installed in the through groove on the partition 13, a fixed seat 135 fixed on the movable plate 134, a first hydraulic rod 1351 fixedly mounted on the fixed seat 135, the piston rod of the first hydraulic rod 1351 fixedly connected to the seat plate 133, a sliding plate 14 that can slide back and forth mounted on the partition 13, the movable plate 134 connected to the right side of the sliding plate 14 by bolts, a support 2 fixed on the partition 13, a back plate 21 mounted on the support 2 by bolts, and a movable plate 22 mounted on the back plate 21. A second hydraulic rod 221 is installed on the movable plate 22. A connecting plate 222 is fixedly installed at the lower end of the piston rod of the second hydraulic rod 221. A lifting plate 23 is provided below the connecting plate 222. A sliding groove is provided on the lifting plate 23, and toothed plates 231 are fixed on the inner walls of the front and rear ends of the sliding groove. An upper center 232 that can move left and right is installed in the sliding groove on the lifting plate 23. A gear 233 is fixed at the upper end of the upper center 232. The gear 233 meshes with two toothed plates 231 respectively. A spring is movably sleeved on the upper center 232. The spring is located below the lifting plate 23. A waist-shaped groove is provided on the movable plate 22. Two linear bearings 223 are installed on the connecting plate 222. Guide rods 2231 are installed in both linear bearings 223. The lifting plate 23 is fixed at the lower end of the two guide rods 2231.

[0033] In this embodiment of the invention, the lower end of the base plate 1 is provided with four threaded holes, and each of the four threaded holes is threaded with a leveling foot 11. Handles 121 are installed on both the left and right sides of the base 12, and hinge seats 122 are fixedly installed on both the left and right ends of the base 12. A handle 1221 is installed on the hinge seat 122 via a pin, and a hanging ring 1222 is installed on the handle 1221. Hook seats 131 that cooperate with the hanging rings 1222 are installed on both the left and right sides of the partition 13. The rear end of the partition 13 is installed on the base 12 via a hinge, and the partition 13 is connected to... The base 12 is equipped with hinged arms 132. The function of these arms is as follows: The four leveling feet 11 at the bottom of the base plate 1 are screwed into the threaded holes and can be rotated to adjust the height of each foot. This allows for quick adaptation to testing surfaces with different flatness, ensuring that the gauge is in a level position and avoiding measurement benchmark deviations caused by tilting. This provides a stable foundation for subsequent accurate testing. The handles 121 on the left and right sides of the base 12 provide convenient gripping points for the handling of the gauge, making it easy for operators to move the equipment and improving the flexibility of the gauge in transferring between different workstations in the workshop.

[0034] In this embodiment of the utility model, a waist-shaped groove is provided on the sliding plate 14, and a lower center 141 is installed in the waist-shaped groove by bolts. Its function is: the long axis direction of the waist-shaped groove is usually perpendicular to the crankshaft axis, the lower center 141 is fixed in the waist-shaped groove by bolts, and after the bolts are loosened, the lower center 141 can slide laterally along the waist-shaped groove to adapt to crankshaft workpieces of different diameters.

[0035] In Example 2, based on Example 1, a rectangular mounting groove is provided at the lower end of the sliding plate 14. A cylindrical seat 1424 is fixedly installed in the rectangular mounting groove. A bottom cover 142 is bolted to the lower end of the cylindrical seat 1424. A conical spring 1421 is installed at the upper end of the bottom cover 142. A circular plate 1422 is fixedly installed at the upper end of the conical spring 1421. A curved hole positioning core 1423 is fixedly installed at the upper end of the circular plate 1422. The curved hole positioning core 1423 extends from the upper end of the sliding plate 14. Its function is: the positioning core is inserted into the curved hole, and the conical spring 1421 provides axial preload, so that the positioning core fits tightly with the inner wall of the curved hole. This elastic contact can automatically adapt to the small machining errors of the curved hole, ensure the accuracy of the positioning reference, and avoid positioning offset caused by rigid contact.

[0036] In Example 3, based on Examples 1 and 2, a fixing rod 15 is fixedly installed on the partition 13. A locking seat 151 is bolted to the fixing rod 15, and a dial indicator 152 is bolted to the locking seat 151. The probes of the dial indicator 152 are in contact with the front end of the sliding plate 14. Its function is to directly contact the probes of the dial indicator 152 with the sliding plate 14, converting the linear displacement of the sliding plate 14 into a dial reading. When the first hydraulic rod 1351 drives the sliding plate 14 to move, the dial indicator 152 displays the displacement in real time, providing a quantitative measurement basis for the center distance of the curved hole and avoiding errors from manual estimation.

[0037] The working principle of this embodiment is as follows: First, the leveling feet 11 of the base plate 1 are adjusted to ensure that the inspection fixture is level. The standard crankshaft is placed between the lower center 141 and the upper center 232. The second hydraulic rod 221 drives the lifting plate 23 to descend, so that the upper center 232 is pressed to complete the axial positioning. The first hydraulic rod 1351 drives the sliding plate 14 to move the curved hole positioning core 1423 into the curved hole of the standard part. At this time, the dial indicator 152 is adjusted to zero to establish the benchmark. During measurement, the standard part is removed and replaced with the crankshaft to be measured. The positioning action is repeated. The curved hole positioning core 1423 is adaptively inserted into the curved hole to be measured under the action of the conical spring 1421 to achieve radial centering. The gear 233 meshes with the toothed plate 231 to ensure the stability of the upper center 232. The first hydraulic rod 1351 drives the sliding plate 14 to move to the measurement position. The dial indicator 152 displays the displacement in real time. This value reflects the deviation between the center distance of the measured curved hole and the standard value. The elastic positioning system provides buffer compensation for errors during measurement. The operator compares the reading with the tolerance to determine the qualification of the workpiece and records the data.

[0038] The following points should be noted in this article:

[0039] 1. The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment; other structures can refer to general designs.

[0040] 2. Where there is no conflict, the embodiments of this utility model and the features thereof can be combined with each other to obtain new embodiments. The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A universal quick inspection tool for the center distance of drilled curved holes, comprising: The base plate (1) is characterized in that a base (12) is installed on the base plate (1) by screws, a partition plate (13) is installed on the upper end of the base plate (12), a through groove is provided on the partition plate (13), a seat plate (133) is fixed on the lower end of the partition plate (13), a movable plate (134) that can move back and forth is installed in the through groove on the partition plate (13), a fixed seat (135) is fixed on the movable plate (134), a first hydraulic rod (1351) is fixedly installed on the fixed seat (135), the piston rod of the first hydraulic rod (1351) is fixedly connected to the seat plate (133), a sliding plate (14) that can slide back and forth is installed on the partition plate (13), the movable plate (134) is connected to the right side of the sliding plate (14) by bolts, and a support (2) is fixed on the partition plate (13). A back plate (21) is bolted to the support (2). A movable plate (22) is mounted on the back plate (21). A second hydraulic rod (221) is mounted on the movable plate (22). A connecting plate (222) is fixedly mounted on the lower end of the piston rod of the second hydraulic rod (221). A lifting plate (23) is set below the connecting plate (222). A sliding groove is set on the lifting plate (23). A toothed plate (231) is fixed on the inner wall of the front and rear ends of the sliding groove. An upper center (232) that can move left and right is installed in the sliding groove on the lifting plate (23). A gear (233) is fixed on the upper end of the upper center (232). The gear (233) meshes with two toothed plates (231) respectively. A spring is movably sleeved on the upper center (232). The spring is located below the lifting plate (23).

2. The universal rapid inspection tool for the center distance of drilled curved holes according to claim 1, characterized in that, The bottom of the base plate (1) is provided with four threaded holes, and each of the four threaded holes is threaded with a leveling foot (11). The left and right sides of the base (12) are equipped with handles (121), and the left and right ends of the base (12) are fixedly equipped with hinge seats (122). The hinge seats (122) are equipped with handles (1221) through pins, and the handles (1221) are equipped with hanging rings (1222). The left and right sides of the partition plate (13) are equipped with hook seats (131) that cooperate with the hanging rings (1222).

3. A universal quick inspection tool for the center distance of drilled curved holes according to claim 2, characterized in that, The rear end of the partition (13) is mounted on the base (12) by a hinge, and a hinge arm (132) is installed between the partition (13) and the base (12).

4. A universal quick inspection tool for the center distance of drilled curved holes according to claim 1, characterized in that, The sliding plate (14) is provided with a waist-shaped groove, and a lower center point (141) is installed in the waist-shaped groove.

5. A universal quick inspection tool for the center distance of drilled curved holes according to claim 4, characterized in that, The lower end of the sliding plate (14) is provided with a rectangular mounting groove, and a cylindrical seat (1424) is fixedly installed in the rectangular mounting groove. The lower end of the cylindrical seat (1424) is bolted to a bottom cover (142). A conical spring (1421) is installed on the upper end of the bottom cover (142). A circular plate (1422) is fixedly installed on the upper end of the conical spring (1421). A curved hole positioning core (1423) is fixedly installed on the upper end of the circular plate (1422). The curved hole positioning core (1423) extends out from the upper end of the sliding plate (14).

6. A universal quick inspection tool for the center distance of drilled curved holes according to claim 1, characterized in that, The movable plate (22) is provided with a waist-shaped groove, and two linear bearings (223) are installed on the connecting plate (222). Guide rods (2231) are installed in both linear bearings (223), and the lifting plate (23) is fixed at the lower end of the two guide rods (2231).

7. A universal quick inspection tool for the center distance of drilled curved holes according to claim 3, characterized in that, A fixing rod (15) is fixedly installed on the partition (13). A locking seat (151) is installed on the fixing rod (15) by bolts. A dial indicator (152) is installed on the locking seat (151) by bolts. The probes of the dial indicator (152) are in contact with the front end of the sliding plate (14).

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