A pneumatic detection device for cylinder liner inner ring

Abstract

The present invention relates to the technical field of cylinder liner detection, and more specifically to a pneumatic detection device for the inner ring of a cylinder liner, comprising: a dial indicator, a probe, a horizontal placement plate, a horizontal rotation plate, a placement groove, a limit base, and a fastening device. The horizontal placement plate is fixed at the lower end of a locking sleeve of a cylinder gauge, and then the horizontal placement plate is slidably installed in the horizontal rotation groove. The horizontal rotation plate is then limited and guided by the limit base and the fastening device of a frame structure to control the movement of the horizontal placement plate, thereby controlling the vertical placement, horizontal rotation, and vertical movement of the cylinder gauge, thereby avoiding the influence of handheld measurement on the measurement accuracy of the cylinder gauge and improving the detection accuracy of the pneumatic detection device for the inner ring of the cylinder liner.

Description

Technical Field

[0001] The invention relates to the technical field of cylinder liner detection, in particular to a pneumatic detection device for the inner ring of a cylinder liner. Background Art

[0002] The cylinder liner, also known as the cylinder sleeve, is inserted into the cylinder barrel of the cylinder block and forms the combustion chamber together with the piston and cylinder head. As one of the key components of the engine, if the inner ring of the cylinder liner is not machined to the required precision, such as low roundness or cylindricity, the piston will not be able to move airtightly within the cylinder liner, thus affecting its aerodynamic performance and ultimately affecting the engine's power, torque, fuel consumption, and life. Therefore, in the existing technology, the cylinder liner is usually fine-machined through processes such as honing. After machining, the relevant parameters of the cylinder liner inner ring are measured using testing equipment to test its aerodynamic performance when assembled with other mechanisms. Among these, the more important parameters, such as the roundness and cylindricity of the cylinder liner inner ring, are usually tested using dedicated cylinder liner inner ring pneumatic testing equipment, such as a cylinder gauge.

[0003] When using a cylinder gauge to inspect the dimensional accuracy of the cylinder liner's inner ring, the gauge components, including the dial indicator, locking sleeve, and a probe selected based on the cylinder liner's dimensions, must first be assembled. After assembly and zeroing, the operator grasps the gauge by the handle on the stem and inserts it into the cylinder liner to measure the inner ring's roundness, cylindricity, and other dimensional parameters.

[0004] During the measurement process, to ensure the accuracy of the measurement results, the gauge rod should be kept parallel to the cylinder liner axis. However, the existing technology uses a handheld method to measure the cylinder liner insertion, which makes it difficult to ensure that the gauge rod remains vertical and parallel to the cylinder liner axis during the measurement process, thereby affecting the accuracy of the measurement results. Moreover, during long-term measurements, when the operator holds the handle for a long time, the heat from the hand will be transferred to the gauge rod through the handle, causing the gauge rod to heat up and affect the detection mechanism inside the gauge rod, thereby further reducing the measurement accuracy of the cylinder gauge. Therefore, due to the defects in the usage method, the cylinder gauge's measurement results for the relevant dimensions of the cylinder liner inner ring are usually difficult to accurately measure. When the defects of the existing process are analyzed based on the measurement results and the existing process is to be improved, inaccurate measurement results will make the analysis process difficult to proceed smoothly, thereby hindering the process improvement work.

[0005] In view of this, in order to overcome the above technical problems, the present invention proposes a cylinder liner inner ring pneumatic detection device. Summary of the Invention

[0006] In order to make up for the shortcomings of the existing technology, the present invention proposes a pneumatic detection device for the inner ring of a cylinder liner, which fixes a horizontal placement plate at the lower end of the locking sleeve of the cylinder gauge, and then slides the horizontal placement plate into the horizontal rotation groove, and then limits and guides the horizontal rotation plate through the limiting base and fastening device of the frame structure to control the movement of the horizontal placement plate, so that the vertical placement, horizontal rotation and vertical movement of the cylinder gauge are controlled, thereby avoiding the influence of handheld measurement on the measurement accuracy of the cylinder gauge and improving the detection accuracy of the cylinder gauge.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a cylinder liner inner ring pneumatic detection device according to the present invention comprises:

[0008] Dial indicator;

[0009] A locking sleeve, the lower end of which is fixedly connected to a meter rod;

[0010] A probe, which is detachably connected to the bottom of the meter stem;

[0011] Also includes:

[0012] A horizontal plate having an annular structure and fixedly connected below the locking sleeve and away from the dial indicator;

[0013] A horizontal rotating plate, wherein grooves are provided at the upper and lower ends of the outer edge of the horizontal rotating plate, the middle end of the outer edge of the horizontal rotating plate is a tooth-shaped structure, and the horizontal rotating plate is slidably mounted on the horizontal placement plate through an eccentric placement slot;

[0014] The limiting base is a frame structure, the inner diameter of the limiting base is clearance-matched with the outer ring of the horizontal rotating plate, the limiting base is slidably connected to the horizontal rotating plate, and a sliding groove is vertically opened on the limiting base;

[0015] A fastening device is slidably installed in a sliding groove of the limiting base, and is used to limit the horizontal rotating plate in the vertical direction.

[0016] Preferably, the fastening device comprises:

[0017] A shaft sleeve, wherein one end of the shaft sleeve close to the horizontal rotating plate extends into the groove on the outer edge of the horizontal rotating plate and engages with the horizontal rotating plate;

[0018] A holding rod, the holding rod is fixedly connected to one end of the shaft sleeve away from the horizontal rotating plate, and a stopper is provided at the outer end of the holding rod;

[0019] The fastening ring is slidably sleeved on one end of the holding rod close to the shaft sleeve, and the fastening ring is squeezed and contacted with the outer end of the limiting base under the squeezing action of the stop block.

[0020] Preferably, an adjusting shaft is rotatably connected in the shaft sleeve, and an adjusting gear is fixedly connected to the lower end of the adjusting shaft. The adjusting gear extends out of the shaft sleeve on the side close to the horizontal rotating plate and engages with the toothed structure at the middle end of the outer edge of the horizontal rotating plate.

[0021] Preferably, the bottom of the horizontal placement plate is evenly fixedly connected to a limiting block, and the placement groove in the horizontal rotation plate is an annular concave-convex shape, which cooperates with the limiting block and the bottom of the horizontal placement plate.

[0022] Preferably, the diameter of the portion of the adjusting shaft that is higher than the sleeve is the same as the outer diameter of the sleeve, and the outer edge of the portion of the adjusting shaft that is higher than the sleeve is evenly provided with vertical grooves.

[0023] Preferably, a lifting groove is provided at the outer end of the holding rod, and a stopper is slidably connected in the lifting groove.

[0024] Preferably, a compression spring, one end of which is fixedly connected to the lifting slot, and the other end of which is fixedly connected to the bottom end of the stopper.

[0025] Preferably, a fastening gasket is sleeved on one end of the fastening ring close to the stopper, and the fastening gasket is in extrusion contact with the stopper.

[0026] Preferably, scales are drawn on the circular frame of the limiting base and the vertical frame in the middle that slides with the fastening device.

[0027] Preferably, the limiting base is designed as a detachable combined frame structure, which can be selected according to the size of the measured cylinder liner.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. By setting the outer ring diameter of the horizontal rotating plate to be the same as the inner ring diameter of the slidingly connected limit base, the horizontal displacement of the horizontal rotating plate is limited. The horizontal rotating plate is then limited in the vertical direction by the fastening device, thereby realizing the horizontal placement of the horizontal rotating plate on the limit base; thereby realizing the horizontal placement of the horizontal placement plate installed on the horizontal rotating plate and the verticality of the cylinder meter locking sleeve fixedly connected to the horizontal placement plate, thereby ensuring the vertical placement of the meter rod of the cylinder meter when in use, avoiding the measurement error caused by the inability to ensure that the meter rod is always in a vertical state during handheld measurement, and improving the accuracy of the cylinder meter measurement.

[0030] 2. When the measuring angle needs to be adjusted, it is only necessary to rotate the adjusting shaft to make the horizontal rotating plate engage and rotate, driving the horizontal placement plate slidingly installed in the eccentric placement slot to rotate coaxially, thereby adjusting the measuring angle of the cylinder gauge and completing the roundness detection of different measuring angles under the horizontal section; because the fastening device still limits the horizontal rotating plate and its related mechanisms in the vertical direction during the process of the adjusting shaft driving the horizontal rotating plate to rotate, when the cylinder gauge performs multiple roundness detections on the circumference of the horizontal section at a certain height of the cylinder liner, it can ensure that the multiple measurement results are the roundness measurement results of different positions of the same horizontal section of the cylinder liner, so that the staff can more accurately know the roundness of the cylinder liner to be tested on a certain horizontal plane to be tested by analyzing and comparing the multiple measurement results, thereby improving the practical reference significance of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 It is the overall structural diagram of the present invention;

[0033] Figure 2 It is the overall structure diagram of the cylinder gauge in the present invention;

[0034] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0035] Figure 4 It is a top view of the present invention when the dial indicator is not installed;

[0036] Figure 5 yes Figure 4 BB section view of the location of the horizontal rotating plate;

[0037] Figure 6 yes Figure 5 Enlarged view of point C in the middle.

[0038] In the figure: 1. Dial indicator; 2. Locking sleeve; 3. Indicator rod; 4. Probe; 5. Horizontal placement plate; 6. Horizontal rotation plate; 7. Groove; 8. Placement slot; 9. Limit base; 10. Fastening device; 11. Bushing; 12. Holding rod; 13. Stop block; 14. Fastening ring; 15. Adjusting shaft; 16. Adjusting gear; 17. Limit block; 18. Lifting slot; 19. Compression spring; 20. Fastening gasket. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0040] The embodiment of the present invention provides a pneumatic detection device for the inner ring of a cylinder liner, thereby improving the technical problem that it is difficult to ensure the measurement accuracy of the inner ring of a cylinder liner using an existing handheld cylinder meter.

[0041] The technical solution in the embodiment of the present invention is to solve the above-mentioned technical problems. The overall idea is as follows: by fixing the horizontal placement plate 5 at the lower end of the locking sleeve 2 of the cylinder meter, and then sliding the horizontal placement plate 5 into the horizontal rotation groove, and then limiting and guiding the horizontal rotation plate 6 through the limit base 9 and the fastening device 10 of the frame structure, the movement of the horizontal placement plate 5 is controlled, so that the vertical placement, horizontal rotation and vertical movement of the cylinder meter are controlled, thereby avoiding the influence of handheld measurement on the accuracy of the measurement results of the cylinder meter, and improving the detection accuracy of the cylinder meter.

[0042] In order to better understand the technical solution of the present invention, the above solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0043] like Figures 1 to 6 As shown, an embodiment of the present invention provides a cylinder liner inner ring pneumatic detection device, comprising:

[0044] Dial indicator 1;

[0045] A locking sleeve 2, the lower end of which is fixedly connected to a gauge rod 3;

[0046] A probe 4 is detachably connected to the bottom of the gauge stem 3;

[0047] Also includes:

[0048] A horizontal plate 5, which is an annular structure, is fixedly connected below the locking sleeve 2 and away from the dial indicator 1;

[0049] A horizontal rotating plate 6, wherein grooves 7 are provided at the upper and lower ends of the outer edge of the horizontal rotating plate 6, and the middle end of the outer edge of the horizontal rotating plate 6 is a tooth-shaped structure, and the horizontal rotating plate 6 is slidably mounted on the horizontal placement plate 5 through an eccentric placement slot 8;

[0050] The limiting base 9 is a frame structure. The inner diameter of the limiting base 9 is clearance-matched with the outer ring of the horizontal rotating plate 6. The limiting base 9 is slidably connected to the horizontal rotating plate 6. A sliding groove is vertically opened on the limiting base 9;

[0051] The fastening device 10 is slidably installed in the sliding groove of the limiting base 9, and the fastening device 10 is used to limit the horizontal rotating plate 6 in the vertical direction.

[0052] Before testing the roundness and cylindricity of the inner ring of the cylinder liner, first insert the dial indicator 1 into the locking sleeve 2, lock the dial indicator 1 by rotating the locking nut of the locking sleeve 2, and then select a probe 4 of appropriate length according to the size of the cylinder liner to be measured, and detachably install the probe 4 at the bottom of the gauge rod 3, such as by threaded connection, to complete the assembly of the cylinder gauge; after the assembly and zeroing of the cylinder gauge are completed, the horizontal placement plate 5 fixedly connected to the bottom of the locking sleeve 2 away from the dial indicator 1 is slidably installed on the horizontal rotating plate 6 through the placement slot 8. Since the inner ring diameter of the limit base 9 is in clearance with the outer ring of the horizontal rotating plate 6, the horizontal rotating plate 6 is adjusted. The displacement of the movable plate 6 in the horizontal direction is limited, and the displacement of the horizontal rotating plate 6 in the vertical direction is limited by the fastening device 10 when fastening, thereby realizing the horizontal placement of the horizontal rotating plate 6 in the limit base 9; thereby realizing the horizontal placement of the horizontal placement plate 5 installed on the horizontal rotating plate 6 and the verticality of the locking sleeve 2 on the cylinder gauge fixedly connected to the horizontal placement plate 5 when measuring the roundness and cylindricity of the inner ring of the cylinder liner, thereby ensuring the verticality of the gauge rod 3 when the cylinder gauge is in use, avoiding the measurement error caused by the inability to ensure that the gauge rod 3 is always in a vertical state during handheld measurement, and improving the accuracy of the cylinder gauge measurement.

[0053] As an embodiment of the present invention, the fastening device 10 includes:

[0054] A shaft sleeve 11, wherein one end of the shaft sleeve 11 close to the horizontal rotating plate 6 extends into the groove 7 on the outer edge of the horizontal rotating plate 6 and engages with the horizontal rotating plate 6;

[0055] A gripping rod 12, the gripping rod 12 is fixedly connected to the end of the sleeve 11 away from the horizontal rotating plate 6, and a stopper 13 is provided at the outer end of the gripping rod 12;

[0056] The fastening ring 14 is slidably sleeved on one end of the holding rod 12 close to the shaft sleeve 11 . The fastening ring 14 is squeezed and contacted with the outer end of the limiting base 9 under the squeezing action of the stopper 13 .

[0057] During operation, the end of the shaft sleeve 11 close to the horizontal rotating plate 6 extends into the grooves 7 opened at the upper and lower ends of the outer edge of the horizontal rotating plate 6, and engages with the horizontal rotating plate 6, so that the shaft sleeve 11 and the horizontal rotating plate 6 are relatively stationary in the vertical direction, thereby performing synchronous movement in the vertical direction; when the horizontal rotating plate 6 is to be limited and fixed in the vertical direction, the fastening ring 14 slidingly sleeved on the end of the holding rod 12 close to the shaft sleeve 11 is squeezed by the stop block 13 and is squeezed with the outer end of the contacting limit base 9; the squeezing force between the fastening ring 14 and the limit base 9 increases, and the static friction between the two also increases accordingly, so that the fastening ring 14 overcomes the gravity of the fastening device 10, the horizontal rotating plate 6 and the cylinder meter and other related mechanisms, thereby achieving the technical effect of limiting and fixing the horizontal rotating plate 6 in the vertical direction.

[0058] As an embodiment of the present invention, an adjusting shaft 15 is rotatably connected inside the sleeve 15, and an adjusting gear 16 is fixedly connected to the lower end of the adjusting shaft 15. The adjusting gear 16 extends out of the sleeve 11 on the side close to the horizontal rotating plate 6 and engages with the tooth structure at the middle end of the outer edge of the horizontal rotating plate 6.

[0059] As an embodiment of the present invention, the bottom of the horizontal placement plate 5 is evenly fixedly connected to the limit block 17, and the placement groove 8 in the horizontal rotation plate 6 is an annular concave-convex shape, which cooperates with the limit block 17 and the bottom of the horizontal placement plate 5.

[0060] During operation, since the cylinder gauge can only obtain the deviation value between the actual diameter and the standard diameter at a measuring angle on the horizontal section in the process of measuring the roundness of the cylinder liner, in order to avoid the influence of uneven wear of the inner ring of the cylinder liner, the cylinder gauge is rotated and the measuring angle is changed on the same horizontal section of the inner ring of the cylinder liner to perform multiple sets of measurements, thereby improving the accuracy of the measured cylinder liner roundness; by adjusting the engagement of the adjusting gear 16 fixedly connected on the adjusting shaft 15 with the toothed structure at the middle end of the outer edge of the horizontal rotating plate 6, and by fixing the limit block 17 at the bottom of the horizontal placement plate 5, when the horizontal placement plate 5 slides into the placement groove 8, the horizontal placement plate 5 and the fixedly connected limit block 17 match the shape of the uneven placement groove 8, thereby limiting the rotation of the horizontal placement plate 5; when the measuring angle needs to be adjusted, only the adjusting shaft 15 needs to be rotated to cause the horizontal rotation plate 6 to engage and rotate, driving the horizontal placement plate 5 slidingly installed in the eccentric placement groove 8 to rotate coaxially, thereby adjusting the cylinder gauge. The measuring angle is adjusted to complete the roundness detection of different measuring angles under the horizontal section; since the cylinder gauge needs to select probes of different lengths according to the size of the cylinder liner when in use, the position of the gauge rod 3 is usually not located at the center of the inner ring of the cylinder liner. By eccentrically setting the placement slot 8 on the horizontal rotating plate 6, both ends of the probe 4 of the cylinder gauge can contact the inner ring of the cylinder liner, thereby ensuring the accuracy of the cylinder gauge measurement; in the process of the adjusting shaft 15 driving the horizontal rotating plate 6 to rotate, the fastening device 10 still limits the horizontal rotating plate 6, the horizontal placement plate 5 and the cylinder gauge in the vertical direction, so that when the cylinder gauge performs multiple roundness detections on the circumference of the horizontal section at a certain height of the cylinder liner, it can ensure that the multiple measurement results are the roundness measurement results of the same horizontal section of the cylinder liner at different positions, so that the staff can more accurately know the roundness of the cylinder liner to be tested on a certain horizontal plane to be tested by analyzing and comparing the multiple measurement results, thereby improving the practical reference significance of the detection results.

[0061] As an embodiment of the present invention, the diameter of the portion of the adjusting shaft 15 that is higher than the sleeve 11 is the same as the outer diameter of the sleeve 11 , and the outer edge of the portion of the adjusting shaft 15 that is higher than the sleeve 11 is evenly provided with vertical grooves.

[0062] During operation, due to the small diameter of the adjusting shaft 15, it is inevitable that the staff will feel inconvenienced when rotating the top of the adjusting shaft 15 to adjust the measuring angle of the cylinder gauge. Moreover, since the adjusting shaft 15 is placed vertically, the vertical gap between the adjusting shaft 15 and the sleeve 11 will increase with the increase of use time, and the accumulated dust will affect the rotation of the adjusting shaft 15, which will hinder the staff's operation. To avoid the above situation, the diameter of the part of the adjusting shaft 15 extending out of the sleeve 11 is increased to the same as the outer diameter of the sleeve 11, so as to block the vertical gap between the adjusting shaft 15 and the sleeve 11, thereby preventing the entry of dust; the diameter of the part of the adjusting shaft 15 extending out of the sleeve 11 is increased, and vertical grooves are evenly opened on the outer edge of the adjusting shaft 15 of this part, so as to increase the roughness of the top of the adjusting shaft 15, thereby increasing the friction between the adjusting shaft 15 and the adjusting shaft 15 when the staff rotates, making it easier for the staff to rotate the adjusting shaft 15 and improving the adjustment efficiency of the measuring angle under the same horizontal section.

[0063] As an embodiment of the present invention, a lifting groove 18 is formed at the outer end of the gripping rod 12 , and a stopper 13 is slidably connected in the lifting groove 18 .

[0064] As an embodiment of the present invention, one end of the compression spring 19 is fixedly connected to the lifting slot 18 , and the other end is fixedly connected to the bottom end of the stopper 13 .

[0065] As an embodiment of the present invention, a fastening gasket 20 is sleeved on one end of the fastening ring 14 close to the stopper 13 , and the fastening gasket 20 is in compression contact with the stopper 13 .

[0066] During operation, when the cylindricity of the inner ring of the cylinder liner is detected, it is necessary to move the cylinder gauge up and down in the vertical direction inside the cylinder liner, and measure at different vertical height positions of the inner ring of the cylinder liner, so as to obtain the final cylindricity measurement result; a lifting groove 18 is provided at the outer end of the holding rod 12, and a stopper 13 is slidably connected in the lifting groove 18. The rising stroke of the stopper 13 is limited. When the stopper 13 reaches the maximum rising distance, the bottom end of the stopper 13 is still partially located in the lifting groove 18; a compression spring 19 in a compressed state is installed in the lifting groove 18, and one end of the compression spring 19 is fixedly connected to the bottom of the lifting groove 18, and the other end is fixedly connected to the bottom of the stopper 13; due to The elastic force of the compression spring 19 in the lifting groove 18 always pushes the stopper 13 so that the stopper 13 moves out of the lifting groove 18. Therefore, when the fastening device 10 still has a limiting fixing effect in the vertical direction, the stopper 13 is always partially extended out of the lifting groove 18 under the elastic force of the compression spring 19, squeezing the fastening ring 14 of the lifting groove 18 near the end of the shaft sleeve 11. Since the stopper 13 is still partially in the lifting groove 18, when the stopper 13 squeezes the fastening ring 14 and is subjected to the reaction force of the fastening ring 14, the stopper 13 can be offset by the supporting force given by the inner wall of the lifting groove 18, thereby ensuring that the above-mentioned squeezing and fixing effect can be achieved;

[0067] Furthermore, in order to improve the squeezing effect between the stopper 13 and the fastening ring 14, a fastening gasket 20 made of rubber is installed between the stopper 13 and the fastening ring 14. When the stopper 13 extends out of the lifting groove 18, the stopper 13, the fastening gasket 20 and the fastening ring 14 are squeezed against each other, so that the other end of the fastening ring 14 squeezes the outer wall of the limit base 9 more fully; and when the cylinder gauge needs to be moved up and down in the vertical direction to detect the cylindricity of the cylinder liner to be measured, the staff holds the holding rod 12 and overcomes the elastic force of the compression spring 19 under the grip of the palm, so that the stopper 13 is lifted and lowered. When the stopper 13 completely enters the lifting groove 18, the extrusion and limiting effect of the stopper 13 on the fastening gasket 20 and the fastening ring 14 disappears, and the fastening ring 14 is squeezed by the limiting base 9 and moves along the holding rod 12 in the direction away from the limiting base 9 to the lifting groove 18 section until the squeezing effect disappears, and the squeezing effect of the fastening ring 14 on the limiting base 9 is invalid and stretches outward; therefore, when the staff holds the holding rod 12 and presses the stopper 13, the limiting effect of the fastening device 10 on the horizontal rotating plate 6 in the vertical direction is invalid, and the holding rod 12 can be pulled to the limiting position of the limiting base 9. The cam 14 is moved up and down in the vertical direction, thereby driving the horizontal rotating plate 6 and related mechanisms such as the cylinder meter to move up and down; when it moves to the next measuring position, the fastening ring 14 is manually pushed to leave the lifting groove 18 and move toward the limit base 9 and squeeze the limit base 9, and then the gripping rod 12 is released. The stopper 13 immediately rises under the elastic force of the compression spring 19, and the squeezing of the fastening ring 14 and the fastening gasket 20 is restored. At this time, the fastening device 10 again limits and fixes the horizontal rotating plate 6 in the vertical direction, and the movement of the cylinder meter in the vertical direction is completed; through the stopper 13 in the lifting groove 18 and the compression spring 19 The design of the spring 19 ensures that the vertical limit of the fastening device 10 is always effective when the cylinder gauge does not need to move vertically; when the cylinder gauge needs to move vertically, the vertical limit of the fastening device 10 can be released by simply holding the holding rod 12; after moving vertically to the corresponding measuring position as needed, the vertical limit of the fastening device 10 can be restored by pushing the fastening ring 14 and then releasing the holding rod 12; the operation is simple and fast, and the cylinder gauge is not directly contacted during the entire vertical movement process, so that the technical effect of maintaining a high measurement accuracy of the cylinder gauge can still be achieved during the up and down vertical movement of the cylinder gauge.

[0068] As an embodiment of the present invention, scales are drawn on the circular frame of the limiting base 9 and the vertical frame in the middle that slides with the fastening device 10.

[0069] During operation, by drawing arc angle scales on the circular frame of the limit base 9 and length scales on the vertical frame, the staff can accurately select and record the adjusted rotation amplitude and movement distance according to the scale markings when adjusting the horizontal rotation plate 6 horizontally through the adjustment shaft 15 and adjusting the vertical movement of the horizontal rotation plate 6 through the holding rod 12, thereby making the adjustment and measurement process of the cylinder gauge more detailed. It is also possible to mark the cylinder sleeve so that the mark is aligned with the zero scale position of the limit base 9, so that after the process is improved, the roundness and cylindricity of the specified angle position of the inner ring of the cylinder sleeve can be tested to facilitate comparative analysis of the effectiveness of the process improvement.

[0070] As an embodiment of the present invention, the limiting base 9 is designed as a detachable combined frame structure and can be selected according to the size of the measured cylinder liner.

[0071] During operation, the limit base 9 adopts a detachable combined frame structure design, so that the upper and lower end ring frames of the limit base 9 and the vertical frame at the middle end can be combined by embedding and clamping, thereby reducing the space occupied by the limit base 9 when not in use; when in use, the size of the cylinder liner can also be measured by tools such as a vernier caliper, and the frame components can be selected according to the measurement results to form a limit base 9 of appropriate size, so that the size and height of the limit base 9 match the size of the cylinder liner, so that the limit base 9 can be placed horizontally and stably on the upper end of the cylinder liner to ensure that the limit base 9 can remain stable when the roundness and cylindricity of the inner ring of the cylinder liner are measured.

[0072] Specific workflow:

[0073] First, insert the dial indicator 1 into the locking sleeve 2, lock the dial indicator 1 by rotating the locking nut of the locking sleeve 2, and then select a probe 4 of appropriate length according to the size of the cylinder liner to be measured, and detachably install the probe 4 at the bottom of the gauge rod 3, such as threaded connection, to complete the assembly of the cylinder gauge; after the cylinder gauge is assembled and zeroed, the horizontal placement plate 5 fixedly connected to the bottom of the locking sleeve 2 away from the dial indicator 1 is slidably installed on the horizontal rotating plate 6 through the placement slot 8; when the roundness of the cylinder liner inner ring is detected, the staff rotates the adjusting shaft 15 to drive the adjusting gear 16 to rotate, so that the horizontal rotating plate 6 is engaged and rotated, driving the horizontal placement plate 5 slidingly installed in the eccentric placement slot 8 to rotate coaxially, thereby adjusting the measuring angle of the cylinder gauge and completing the roundness detection of different measuring angles under the horizontal section; when the cylindricity test of the cylinder liner inner ring is performed When the stopper 13 is fully inserted into the lifting groove 18, the extrusion and limiting effect of the stopper 13 on the fastening gasket 20 and the fastening ring 14 disappears; the holding rod 12 is pulled up and down in the vertical direction under the limit of the limit base 9, thereby driving the horizontal rotating plate 6 and related mechanisms such as the cylinder gauge to move up and down; when it moves to the next measuring position, the fastening ring 14 is manually pushed to leave the lifting groove 18 and move toward the limit base 9 and squeeze the limit base 9, and then release the holding rod 12. The stopper 13 immediately rises under the elastic force of the compression spring 19, and the extrusion of the fastening ring 14 and the fastening gasket 20 is restored. The fastening device 10 again limits and fixes the horizontal rotating plate 6 in the vertical direction, and the cylindricity of the cylinder liner inner ring can be tested.

[0074] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientations or positional relationships shown in the figures are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0075] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic testing device for a cylinder liner inner ring, comprising: Dial indicator (1); A locking sleeve (2), wherein the lower end of the locking sleeve (2) is fixedly connected to a gauge rod (3); A probe (4), the probe (4) being detachably connected to the bottom of the gauge rod (3); It is characterized by: further comprising: A horizontal placement plate (5), wherein the horizontal placement plate (5) is an annular structure, and the horizontal placement plate (5) is fixedly connected to a position below the locking sleeve (2) away from the dial indicator (1); A horizontal rotating plate (6), wherein grooves (7) are provided at the upper and lower ends of the outer edge of the horizontal rotating plate (6), the middle end of the outer edge of the horizontal rotating plate (6) is a tooth-shaped structure, and the horizontal rotating plate (6) is slidably mounted on the horizontal placement plate (5) through an eccentric placement groove (8); A limiting base (9), wherein the limiting base (9) is a frame structure, the inner diameter of the limiting base (9) is clearance-matched with the outer diameter of the horizontal rotating plate (6), the limiting base (9) is slidably connected to the horizontal rotating plate (6), and a sliding groove is vertically opened on the limiting base (9); A fastening device (10), wherein the fastening device (10) is slidably mounted in a sliding groove of the limiting base (9), and the fastening device (10) is used to limit the horizontal rotating plate (6) in the vertical direction; The fastening device (10) comprises: A shaft sleeve (11), wherein one end of the shaft sleeve (11) close to the horizontal rotating plate (6) extends into the groove (7) on the outer edge of the horizontal rotating plate (6) and engages with the horizontal rotating plate (6); A holding rod (12), the holding rod (12) is fixedly connected to one end of the shaft sleeve (11) away from the horizontal rotating plate (6), and a stopper (13) is provided at the outer end of the holding rod (12); A fastening ring (14) is slidably sleeved on one end of the holding rod (12) close to the shaft sleeve (11), and the fastening ring (14) is squeezed and contacted with the outer end of the limiting base (9) under the squeezing action of the stopper (13).

2. The cylinder liner inner ring pneumatic detection device according to claim 1, characterized in that: An adjusting shaft (15) is rotatably connected inside the shaft sleeve (11), and an adjusting gear (16) is fixedly connected to the lower end of the adjusting shaft (15). The adjusting gear (16) extends out of the shaft sleeve (11) on a side close to the horizontal rotating plate (6) and meshes with a toothed structure at the middle end of the outer edge of the horizontal rotating plate (6).

3. The cylinder liner inner ring pneumatic detection device according to claim 2, characterized in that: The bottom of the horizontal placement plate (5) is evenly fixedly connected to a limiting block (17), and the placement groove (8) in the horizontal rotation plate (6) is annular concave-convex shape, which cooperates with the limiting block (17) and the bottom of the horizontal placement plate (5).

4. The cylinder liner inner ring pneumatic detection device according to claim 3, characterized in that: The diameter of the portion of the adjusting shaft (15) that is higher than the shaft sleeve (11) is the same as the outer diameter of the shaft sleeve (11), and the outer edge of the portion of the adjusting shaft (15) that is higher than the shaft sleeve (11) is evenly provided with vertical grooves.

5. The cylinder liner inner ring pneumatic detection device according to claim 1, characterized in that: The outer end of the gripping rod (12) is provided with a lifting groove (18), and a stopper (13) is slidably connected in the lifting groove (18).

6. The cylinder liner inner ring pneumatic detection device according to claim 5, characterized in that: A compression spring (19), one end of the compression spring (19) is fixedly connected to the lifting groove (18), and the other end is fixedly connected to the bottom end of the stopper (13).

7. The cylinder liner inner ring pneumatic detection device according to claim 6, characterized in that: A fastening gasket (20) is sleeved on one end of the fastening ring (14) close to the stopper (13), and the fastening gasket (20) is in extrusion contact with the stopper (13).

8. The cylinder liner inner ring pneumatic detection device according to claim 1, characterized in that: Scales are drawn on the circular frame of the position limiting base (9) and the vertical frame in the middle that slides with the fastening device (10).

9. The cylinder liner inner ring pneumatic detection device according to claim 1, characterized in that: The limiting base (9) is designed as a detachable combined frame structure and can be selected according to the size of the measured cylinder sleeve.

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