Diesel engine part tappet detection device

Abstract

The invention relates to the technical field of diesel engine part detection, and discloses a diesel engine part tappet detection device which comprises an electric control sliding plate, two sets of sliding sleeves are arranged on the electric control sliding plate in a sliding mode, a sliding rod penetrates through each sliding sleeve, clamping pieces are arranged at the ends, close to each other, of the two sliding rods, and a tappet workpiece body is clamped through the clamping pieces; one side of the electric control sliding plate is provided with a vertical rod, the vertical rod is provided with a lifting mechanism, one side of the lifting mechanism is provided with an adjusting and measuring mechanism, the adjusting and measuring mechanism comprises a frame body, one side of the frame body is rotatably connected with a bidirectional screw rod, the middle position of the frame body is provided with a second dial indicator, the bidirectional screw rod is provided with two first dial indicators, and the second dial indicator is located between the two first dial indicators; the first dial indicator and the second dial indicator are located over the tappet workpiece body, and the distance between measuring points of the dial indicators is adjusted by rotating the two-way lead screw. The problem that traditional detection equipment is difficult to adapt to tappets with different lengths due to the fact that the position of a dial indicator is fixed is solved.

Description

Technical Field

[0001] This invention relates to the field of diesel engine component testing technology, and in particular to a testing device for tappets of diesel engine components. Background Technology

[0002] Tappets are key transmission components in the valve train of diesel engines. They are typically slender cylindrical parts installed between the camshaft and the rocker arm. Their main function is to accurately transmit the reciprocating motion generated by the cam profile during the rotation of the camshaft to the rocker arm, thereby pushing the valves to open and achieving timing control of the intake and exhaust processes. When the engine is running, the tappet directly bears the periodic impact load and friction force from the high-speed rotating cam. Therefore, it not only requires good rigidity, wear resistance and fatigue resistance, but also requires that the outer cylindrical surface have extremely high dimensional accuracy and geometric accuracy to ensure the accuracy of valve timing and smooth operation.

[0003] Existing tappet testing devices typically rely on multiple dial indicators working together to assess shape errors by collecting data from multiple points on the outer surface of the tappet during cylindricity measurement. However, most dial indicators in current mainstream testing equipment only have height adjustment capabilities and lack flexible displacement and layout adjustment functions in the horizontal direction. When dealing with tappets of different lengths, the fixed lateral position of the dial indicator makes it impossible to quickly adjust the lateral distribution of measurement points according to changes in workpiece length. This makes it difficult for a single device to adapt to various tappet specifications. To ensure testing accuracy, companies often need to configure multiple sets of dedicated testing devices, each corresponding to tappets of different length ranges. This not only increases equipment investment and maintenance costs but also occupies a significant amount of production space. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a testing device for tappets of diesel engine components, which solves the problem that traditional testing equipment is difficult to adapt to tappets of different lengths due to the fixed position of the dial indicator.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: A testing device for tappets of diesel engine parts includes an electrically controlled slide plate with two sets of sliding sleeves slidably mounted on the slide plate. A sliding rod passes through each sliding sleeve, and a clamping member is provided at one end of the two sliding rods close to each other. The clamping member clamps the tappet workpiece body. A vertical rod is provided on one side of the electrically controlled sliding plate, and a lifting mechanism is provided on the vertical rod. An adjustment and measuring mechanism is provided on one side of the lifting mechanism. The adjustment and measuring mechanism includes a frame, and a bidirectional lead screw is rotatably connected to one side of the frame. A dial indicator 2 is provided in the middle of the frame, and two dial indicators 1 are provided on the bidirectional lead screw. The dial indicator 2 is located between the two dial indicators 1. The dial indicators 1 and 2 are located directly above the workpiece body of the push rod. Rotating the bidirectional lead screw can adjust the spacing between the dial indicator measuring points.

[0006] As a further implementation method, it also includes an electrically controlled slide rail, with an electrically controlled sliding plate slidably mounted on the top of the electrically controlled slide rail; limit rails are provided on both sides of the electrically controlled slide rail, and the sliding sleeve is mounted on the fixed seat, with the two sides of the fixed seat slidingly engaging with the limit rails through sliders.

[0007] As a further implementation, a support plate is provided on the outside of the fixed base, and bolts are provided on the support plate. The bolts can abut against the electric control slide plate to achieve relative fixation between the fixed base and the electric control slide plate.

[0008] As a further implementation, the sliding sleeve is provided with a limiting bolt, which is threadedly connected to the sliding sleeve, and its end can abut against the sliding rod to lock the sliding rod.

[0009] As a further implementation, the clamping components at the ends of the two slide rods are a ball clamping component and a cup clamping component.

[0010] As a further implementation, the lifting mechanism includes a sliding outer frame sleeved around the periphery of the vertical rod, and bolts are provided on the sliding outer frame for abutting against the vertical rod to achieve locking.

[0011] As a further implementation, a connecting rod is provided on one side of the sliding outer frame, and the adjusting measuring mechanism is installed on the connecting rod.

[0012] As a further implementation, the frame is U-shaped, and the two ends of the bidirectional lead screw are rotatably connected to the two side plates of the U-shaped frame.

[0013] As a further implementation, the dial indicator 2 is fixedly connected to the middle position of the frame via a connecting plate, and the dial indicator 2 is located on the front side of the bidirectional lead screw.

[0014] As a further implementation, the dial indicator is equipped with a screw sleeve, which is threaded with a two-way lead screw. The screw sleeve is equipped with a balance bar, and the frame is equipped with a sliding groove, which is slidably engaged with the balance bar.

[0015] The beneficial effects of the present invention are as follows: This invention solves the problem that traditional testing equipment is difficult to adapt to different lengths of push rods due to the fixed position of the dial indicator. By rotating the bidirectional lead screw, the dial indicator moves synchronously in the horizontal direction, realizing flexible adjustment of the measuring point spacing, effectively avoiding measurement blind spots and improving testing accuracy. This design enhances the versatility of the device, eliminating the need for multiple sets of dedicated equipment, reducing procurement and maintenance costs, and saving space.

[0016] The electrically controlled slide plate and the electrically controlled slide rail work together to achieve automatic reciprocating motion, improving the consistency and efficiency of detection and reducing human error. The slide rod slides in the slide sleeve and is locked by the limit bolt. With the help of the ball clamp and the cup clamp, different end type push rods can be quickly clamped and the axis is kept aligned, reducing the impact of clamping deviation on the measurement results.

[0017] By incorporating a ball-shaped clamping component and a cup-shaped clamping component, the device can adapt to different end structures of the tappet workpiece. The ball-shaped clamping component engages with the spherical or arc-shaped concave surface of one end of the tappet for positioning, while the cup-shaped clamping component mates with the ball head or protrusion at the other end, forming a two-point centering clamp. This effectively ensures that the axis of the tappet workpiece remains aligned during the inspection process, reducing measurement errors caused by clamping eccentricity. The combined use of these components enables rapid clamping and reliable fixation of various tappet models without requiring replacement of the fixture body or complex adjustments, improving the versatility and ease of operation of the inspection process. Furthermore, this symmetrical clamping structure provides uniform force and stable clamping, preventing workpiece loosening or displacement during inspection and enhancing overall inspection accuracy and efficiency. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of the detection device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the fixing base in an embodiment of the present invention; Figure 3 This is a schematic diagram of the connecting rod structure in an embodiment of the present invention; Figure 4 This is a partial structural schematic diagram of the detection device in an embodiment of the present invention.

[0020] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0021] The components include: 1. Electrically controlled slide rail; 2. Electrically controlled sliding plate; 3. Limiting rail; 4. Fixed base; 5. Sliding sleeve; 6. Sliding rod; 7. Limiting bolt; 8. Ball clamping component; 9. Buckle clamping component; 10. Push rod workpiece body; 11. Vertical rod; 12. Sliding outer frame; 13. Connecting rod; 14. Adjusting measuring mechanism; 1401. Frame body; 1402. Two-way lead screw; 1403. Dial indicator one; 1404. Dial indicator two; 1405. Connecting plate; 1406. Screw sleeve; 1407. Balance bar. Detailed Implementation

[0022] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] Example 1 In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a testing device for tappets of diesel engine components includes an electrically controlled slide rail 1, an electrically controlled slide plate 2 slidably connected to the top of the slide rail 1, and two sets of sliding sleeves slidably mounted on the slide plate. Specifically, limit rails 3 are fixedly connected to both sides of the top of the electrically controlled slide plate 2, and two fixed seats 4 are arranged between the two limit rails 3. Sliding sleeves 5 are fixedly connected to the top of the fixed seats 4, and a slide rod 6 is slidably connected to the inner cavity of each sliding sleeve 5. Clamping members are provided at one end of the two slide rods 6 close to each other, and the tappet workpiece body is clamped by the clamping members. One end of one slide rod 6 is fixedly connected to a ball clamping member 8, and one end of the other slide rod 6 is fixedly connected to a cup clamping member 9. The tappet workpiece body 10 is horizontally clamped between one side of the cup clamping member 9 and one side of the ball clamping member 8.

[0024] A vertical rod 11 is fixedly connected to one side of the electrically controlled slide rail 1. A lifting mechanism is provided on the vertical rod 11, and an adjustment and measuring mechanism 14 is provided on one side of the lifting mechanism. The lifting mechanism includes a sliding outer frame 12 sleeved around the vertical rod. Bolts are provided on the sliding outer frame 12, which can pass through the sliding outer frame 12 to abut against the vertical rod and lock the sliding outer frame 12.

[0025] A connecting rod is provided on one side of the sliding outer frame, through which the adjustment and measuring mechanism is installed.

[0026] The adjusting measuring mechanism 14 includes a frame 1401, which is U-shaped with its opening facing the sliding sleeve. The frame includes two side plates and a base plate between the side plates. A bidirectional lead screw is rotatably connected to one side of the frame, and the bidirectional lead screw is parallel to the base plate. Both ends of the bidirectional lead screw are rotatably connected to the two side plates of the U-shaped frame. A dial indicator 1404 is located in the middle of the frame. Two dial indicators 1403 are located on the bidirectional lead screw, with the two dial indicators 1403 located in different thread directions. The dial indicator 1404 is located between the two dial indicators 1403. The dial indicators 1403 and the dial indicator 1404 are located directly above the workpiece body of the push rod. Rotating the bidirectional lead screw 1402 can adjust the spacing between the dial indicator measuring points.

[0027] The inner cavity of the frame 1401 is horizontally provided with a two-way lead screw 1402. The dial indicator is provided with a screw sleeve 1406, which is threadedly engaged with the two-way lead screw 1402. The screw sleeve is provided with a balance bar 1407. The frame is provided with a sliding groove, which is slidably engaged with the balance bar. When the two-way lead screw 1402 is rotated, the two screw sleeves 1406 can drive the dial indicator to move closer or further apart under the limiting action of the sliding groove on the balance bar 1407.

[0028] One side of the dial indicator 1404 is fixedly connected to the bottom plate of the adjacent frame 1401 by two connecting plates 1405. The two connecting plates are located above and below the bidirectional lead screw 1402, respectively, and the dial indicator 1404 is located in front of the bidirectional lead screw 1402.

[0029] The bottom of the electric sliding plate 2 is adapted to the top of the electric sliding rail 1. A limit bolt 7 is provided above the sliding sleeve 5. One end of the limit bolt 7 passes through the top of the adjacent sliding sleeve 5 through the thread and abuts against one side of the corresponding sliding rod 6 to lock the sliding rod.

[0030] As can be seen from the above, when using this diesel engine component tappet testing device for testing, the operator first selects an appropriate clamping method according to the specific length and end structure characteristics of the tappet workpiece body 10 to be tested. The end of the tappet workpiece body 10 with the concave arc is positioned against the outer ring of the ball clamp 8, and the other end with the spherical structure is inserted into the inner ring of the cup clamp 9 to complete the initial docking. Then, the slide rod 6 is manually pushed to slide along the inner cavity of the slide sleeve 5 and apply a preload to the tappet workpiece body 10 to ensure that both ends are stably clamped and the axis is centered and aligned. Next, the limiting bolt 7 installed on the top of the slide sleeve 5 is rotated so that its lower end is pressed against the side of the slide rod 6. The position of the slide rod 6 in the slide sleeve 5 is locked by friction, thereby achieving adaptive clamping and axis alignment for tappet workpiece bodies 10 of different lengths.

[0031] After clamping, based on the actual length of the push rod workpiece body 10, the operator rotates the double-acting screw 1402, driving the two threaded sleeves 1406 to move synchronously towards or away from each other in the horizontal direction through the opposite threads at both ends. Since the outer side of the threaded sleeve 1406 is fixedly connected to the balance bar 1407, and the inner wall of the frame 1401 is provided with a matching balance groove (sliding groove), during the rotation of the double-acting screw 1402, the balance bar 1407 is restricted by the guiding effect of the balance groove, effectively preventing the threaded sleeve 1406 from rotating and ensuring that it can only move linearly along the axial direction. This, in turn, drives the dial indicator 1403 connected to it to precisely adjust its position in the horizontal direction, so that the distance between the two dial indicators 1403 can flexibly adapt to the length of the push rod workpiece body 10, ensuring a reasonable distribution of measurement points. Then, the height position of the sliding outer frame 12 on the vertical rod 11 is adjusted and locked by the side bolts. The adjustment measuring mechanism 14 is positioned at a suitable vertical height to ensure that the probes of dial indicator 1403 and dial indicator 1404 are in good contact with the outer cylindrical surface of the push rod workpiece body 10. Finally, the electrically controlled slide plate 2 is activated, allowing it to slide smoothly back and forth at a preset speed on the top of the electrically controlled slide rail 1, driving the entire clamping system and the push rod workpiece body 10 to move in a straight line. During this process, the three dial indicators, including two adjustable dial indicators 1403 and one fixed dial indicator 1404, continuously record the radial runout data of the outer surface of the push rod at different axial positions. By sampling at multiple points, a complete cylindricity error curve is obtained, enabling a comprehensive evaluation of the geometric accuracy of the push rod. This device can also integrate an automatic calibration module, which automatically triggers zero-point calibration through a standard gauge bar or laser reference after each adjustment of the dial indicator's horizontal position, ensuring the consistency of the multi-indicator measurement reference.

[0032] Both sides of the fixed base 4 are fixedly connected to sliders, which slide in cooperation with the limit rail. A support plate is fixedly connected to the outer side of the fixed base 4, and a bolt is provided on the top of the support plate. The bottom of the bolt passes through the side wall of the adjacent support plate through the thread and abuts against the top of the electric control slide plate 2, so as to achieve relative fixation between the fixed base and the electric control slide plate.

[0033] The cylindricity of the pushrod can be checked by tightening the top bolts of the support plate to fix the fixed seat and the electrically controlled slide plate. By simultaneously arranging at least three dial indicators along the axial direction of the pushrod workpiece body 10 on the adjusting measuring mechanism 14, parallel acquisition and comprehensive evaluation of the multi-section profile of the outer cylindrical surface of the pushrod workpiece body 10 can be achieved. The specific testing process is as follows: First, the workpiece body 10 to be tested is clamped between the ball clamp 8 and the cup clamp 9, which together form a rotating tip structure. The fixed base and the electric control slide plate are fixed relative to each other. Then, the electric control slide plate 2 drives the workpiece body 10 to move to the corresponding position of the dial indicator. The workpiece body 10 can be rotated to perform the test. The probes of each dial indicator 1403, 1404, etc. are respectively abutted against different axial positions on the outer circular surface of the workpiece body 10, such as the near end, middle section, and far end, and can output radial runout displacement signals in real time.

[0034] Unlike traditional single dial indicators that require segmented movement, multiple clamping, or segmented measurement, this method uses a multi-channel synchronous data acquisition system to simultaneously acquire the displacement data sequence of all dial indicators 1403, 1404, etc. within the same rotation cycle. Each dial indicator corresponds to an axial section, and its data can be fitted to obtain the least squares center coordinates and roundness error of that section.

[0035] The control system connected to the dial indicator is based on the spatial distribution of the centers of each cross section. Through spatial linear fitting algorithms, such as least squares method or principal component analysis, the ideal rotation axis of the entire push rod workpiece body 10 is calculated. Then, using this axis as a reference, the distance deviation from each cross section contour point to the axis is calculated, and finally the cylindricity error value over the entire length range is obtained. This solution effectively solves the technical problem that traditional testing equipment cannot adapt to various length specifications of push rods due to the fixed position of the dial indicator. By adjusting the design of the bidirectional lead screw 1402 in the measuring mechanism 14 in conjunction with the screw sleeve 1406, the balance bar 1407 and the balance groove, the dial indicator 1403 can achieve synchronous, stable and adjustable displacement in the horizontal direction. This allows for flexible adjustment of the measuring point layout according to the actual size of the push rod workpiece body 10, avoiding detection errors caused by measurement blind spots or unreasonable measuring points, and improving the accuracy and representativeness of the test results.

[0036] Meanwhile, this design enhances the versatility of the testing device, eliminating the need for multiple sets of dedicated equipment for push rods of different lengths, reducing the number of equipment purchases and maintenance costs for enterprises, saving production space, and improving resource utilization. Furthermore, the automatic reciprocating motion achieved through the cooperation of the electrically controlled sliding plate 2 and the electrically controlled slide rail 1 replaces the traditional manual pushing method, not only improving the consistency and repeatability of the testing process but also reducing the uncertainty caused by human operation and increasing testing efficiency. The fixed base 4 is slidably connected to the limiting rail 3 via a slider and fixed to the electrically controlled sliding plate 2 with bolts on the support plate, enhancing the stability and replaceability of the overall structure. The clamping structure, where the slide rod 6 slides within the sliding sleeve 5 and is locked by the limiting bolt 7, combined with the different interface forms of the ball clamp 8 and the cup clamp 9, enables rapid clamping and axis alignment of push rods with various end shapes, reducing the impact of clamping deviations on measurement results.

[0037] As can be seen from the above, by adapting the bottom of the electrically controlled slide plate 2 to the top of the electrically controlled slide rail 1, and by setting a limiting bolt 7 above the slide sleeve 5, with one end of the limiting bolt 7 threaded through the top of the slide sleeve 5 and abutting against the side of the corresponding slide rod 6, after clamping the workpiece body 10 of the push rod, the lower end of the limiting bolt 7 can be rotated to press against the side of the slide rod 6, thereby locking the position of the slide rod 6 within the slide sleeve 5 using friction. This prevents the clamping from loosening due to vibration or external force during the detection process, while ensuring that the electrically controlled slide plate 2 slides smoothly and accurately on the electrically controlled slide rail 1, achieving the desired clamping effect. It maintains stability and reliability, high motion accuracy, and avoids increased detection errors. The fixed base 4 has sliders fixedly connected to both sides, and one end of the slider is slidably connected to the inner cavity of the adjacent limit rail 3. The fixed base 4 is connected to a support plate on one side. The support plate is bolted on the top and passes through the side wall to abut against the top of the electric control slide plate 2. This allows the fixed base 4 to make lateral position fine adjustments by sliding the slider in the limit rail 3. The bolts on the support plate are tightened to fix it firmly to the electric control slide plate 2, achieving the effects of stable installation, easy disassembly and maintenance, improved overall rigidity and positioning consistency.

[0038] By setting a bolt on one side of the sliding outer frame 12, with one end of the bolt threaded through its side wall and abutting against one side of the vertical rod 11, the operator can slide the sliding outer frame 12 up and down to adjust its position on the vertical rod 11 according to the diameter of the workpiece body 10 or the required detection height. After adjustment, the bolt is tightened to achieve axial fixation, thus achieving the effect of flexible height adjustment, accurate positioning, and adaptability to the detection needs of workpieces of different specifications.

[0039] By fixing two connecting rods 13 to one side of the frame 1401, and fixing one end of the connecting rod 13 to one side of the adjacent sliding outer frame 12, the entire adjustment measuring mechanism 14 is firmly installed on the sliding outer frame 12 through the connecting rods 13, forming a stable support connection structure. During the reciprocating motion of the electric sliding plate 2, the probes of dial indicator 1403 and dial indicator 2 1404 are kept in continuous contact with the surface of the push rod workpiece body 10, achieving the effects of reliable structural connection, reduced vibration interference, and ensuring continuous and stable measurement data.

[0040] This invention solves the problem that existing tappet cylindricity testing relies heavily on fixed-layout dial indicators, which can only adjust height and cannot flexibly adjust the measuring point position laterally. This makes it difficult to adapt to tappets of different lengths, resulting in poor versatility and requiring companies to equip multiple sets of dedicated equipment, leading to high costs and large space requirements. Simultaneously, it incorporates ball-shaped and cup-shaped clamping components that work with the tappet, maintaining consistency with the actual working state of the tappet and meeting the design reference requirements. The calculation is simple and reasonable; by simultaneously adjusting all three dial indicators to zero and reading the maximum difference between them during tappet rotation, the overall runout trend of the tappet can be basically reflected. Furthermore, a standard mandrel with a runout of less than 0.02mm can be fabricated. Before measurement, the entire device is calibrated using the mandrel to ensure that the multiple dial indicators within the frame remain parallel to the guide rail reference.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A testing device for tappets of diesel engine components, characterized in that, Including an electrically controlled slide plate, on which two sets of sliding sleeves are slidably mounted, with a sliding rod passing through each sliding sleeve. The two sliding rods are close to each other at one end and a clamping member is provided to clamp the push rod workpiece body through the clamping member. A vertical rod is provided on one side of the electrically controlled sliding plate, and a lifting mechanism is provided on the vertical rod. An adjustment and measuring mechanism is provided on one side of the lifting mechanism. The adjustment and measuring mechanism includes a frame, and a bidirectional lead screw is rotatably connected to one side of the frame. A dial indicator 2 is provided in the middle of the frame, and two dial indicators 1 are provided on the bidirectional lead screw. The dial indicator 2 is located between the two dial indicators 1. The dial indicators 1 and 2 are located directly above the workpiece body of the push rod. Rotating the bidirectional lead screw can adjust the spacing between the dial indicator measuring points.

2. The testing device for tappets of diesel engine components according to claim 1, characterized in that, It also includes an electrically controlled slide rail, with an electrically controlled sliding plate mounted on top of the electrically controlled slide rail; limit rails are provided on both sides of the electrically controlled slide rail, and the sliding sleeve is mounted on the fixed base, with the two sides of the fixed base slidingly engaging with the limit rails via sliders.

3. The testing device for tappets of diesel engine components according to claim 2, characterized in that, The fixed base is provided with a support plate on the outside, and bolts are provided on the support plate. The bolts can abut against the electric control slide plate to achieve relative fixation between the fixed base and the electric control slide plate.

4. The testing device for tappets of diesel engine components according to claim 1, characterized in that, The sliding sleeve is provided with a limiting bolt, which is threadedly connected to the sliding sleeve, and its end can abut against the sliding rod to lock the sliding rod.

5. A testing device for tappets of diesel engine components according to claim 4, characterized in that, The clamping components at the ends of the two slide rods are a ball clamping component and a cup clamping component.

6. The testing device for tappets of diesel engine components according to claim 1, characterized in that, The lifting mechanism includes a sliding outer frame sleeved around the periphery of the vertical rod, and bolts are provided on the sliding outer frame for abutting against the vertical rod to achieve locking.

7. The testing device for tappets of diesel engine components according to claim 6, characterized in that, A connecting rod is provided on one side of the sliding outer frame, and the adjusting measuring mechanism is installed on the connecting rod.

8. A testing device for tappets of diesel engine components according to claim 7, characterized in that, The frame is U-shaped, and the two ends of the bidirectional lead screw are rotatably connected to the two side plates of the U-shaped frame.

9. A testing device for tappets of diesel engine components according to claim 8, characterized in that, The second dial indicator is fixedly connected to the middle position of the frame via a connecting plate, and the second dial indicator is located on the front side of the bidirectional lead screw.

10. A testing device for tappets of diesel engine components according to claim 9, characterized in that, The dial indicator is equipped with a screw sleeve, which is threaded into a two-way lead screw. The screw sleeve is equipped with a balance bar, and the frame is equipped with a sliding groove, which is slidably engaged with the balance bar.

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