Piston ring elastic force detection equipment

Abstract

The utility model discloses a device for detecting the elasticity of a piston ring. Comprising a base, a center shaft, a supporting disc, a mounting disc coaxially and fixedly assembled on the center shaft and located below the supporting disc, at least three sets of sliding assemblies evenly distributed in the circumferential direction of the mounting disc and slidably connected with the mounting disc in the radial direction corresponding to the mounting disc, and a driving unit used for driving the multiple sets of sliding assemblies to gather or disperse. The sliding assembly comprises a pair of vertical limiting shafts which are arranged at intervals in the sliding direction and upwards penetrate through the supporting disc, the limiting shafts are rotationally sleeved with rotating sleeves, and a plurality of first strip-shaped through grooves allowing the corresponding limiting shafts to penetrate through are formed in the supporting disc in a penetrating mode. The device can test the piston ring, reduces the placing time of the piston ring, enables the piston ring to be horizontally disposed on the supporting disc, does not need to adjust the specific position of the piston ring, and improves the detection efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of piston ring testing, specifically to a piston ring elasticity testing device. Background Technology

[0002] Piston rings are metal rings used to fit into the grooves inside the piston. There are two types of piston rings: compression rings and oil rings. Compression rings are used to seal the combustible mixture in the combustion chamber; oil rings are used to scrape excess oil off the cylinder. A piston ring is a metal elastic ring with a large outward expansion deformation, which is fitted into an annular groove with a corresponding cross-section. The reciprocating and rotary motion of the piston ring relies on the pressure difference of gas or liquid to form a seal between the outer surface of the ring and the cylinder, as well as between the ring and one side of the ring groove.

[0003] Chinese patent application CN202420266595.4, entitled "A Piston Ring Elasticity Testing Device," discloses a piston ring elasticity testing device. This device uses a support roller in a support assembly and a pressing roller in a pressing assembly. During the contact between the piston ring and the support and pressing rollers, and as the pressing roller presses down on the piston ring, each part of the piston ring can slide flexibly to a certain extent. This avoids the problem in the prior art where the piston ring is partially restricted, preventing local elastic deformation and leading to inaccurate elasticity testing. However, the aforementioned patent has the following shortcomings: When testing the piston ring, it needs to be placed vertically. Due to the thickness limitation of the piston ring, vertical placement is prone to tilting and falling, requiring constant adjustments by the testing personnel, increasing the testing time and resulting in low overall testing efficiency. Therefore, a piston ring elasticity testing device needs to be designed. Utility Model Content

[0004] To address the aforementioned technical problems, the purpose of this utility model is to overcome the low efficiency in piston ring detection in the prior art.

[0005] To achieve the above objectives, this utility model provides a piston ring elasticity testing device, comprising: a base, a vertical central shaft fixedly mounted on the base, a support plate fixedly mounted on the top of the central shaft on a coaxial line, a mounting plate fixedly mounted on the central shaft on a coaxial line and located below the support plate, at least three sets of sliding components evenly distributed along the circumferential direction of the mounting plate and slidably connected to the mounting plate along the corresponding radial direction of the mounting plate, and a drive unit for bringing together or dispersing several sets of sliding components.

[0006] The sliding assembly includes a pair of vertical limiting shafts spaced apart along the sliding direction and both passing upward through the support plate. A rotating sleeve is rotatably sleeved on the limiting shaft, and a plurality of first strip-shaped through slots are provided through the support plate for the corresponding limiting shafts to pass through.

[0007] Preferably, the mounting plate is provided with a second strip-shaped through groove corresponding to a plurality of first strip-shaped through grooves, and the length direction of the second strip-shaped through groove is consistent with the radial direction of the mounting plate.

[0008] The sliding assembly further includes a slider that is slidably mounted on the second strip groove and fixedly connected to a pair of limiting shafts, a connecting seat that is fixedly connected to the lower surface of the slider and located below the mounting plate, a U-shaped piece with its two ends located on both sides of the connecting seat, a guide wheel mounted on the U-shaped piece and connected to the drive unit, and a pair of pressure sensors that are spaced apart along the length of the corresponding second strip groove and respectively mounted on both ends of the U-shaped piece.

[0009] The spacing between a pair of pressure sensors is greater than the thickness of the connector. The ends of the pressure sensors are positioned facing the connector, and the connector is slidably connected to the connector along the sliding direction of the slider.

[0010] Preferably, the drive unit includes an adjustment plate coaxially mounted on a central shaft via a bearing and located below the mounting plate, an annular rack coaxially mounted on the outer edge of the adjustment plate, a motor mounted on a base, and a gear mounted on the motor output shaft and meshing with the annular rack. The adjustment plate has several arc-shaped through slots through which corresponding guide wheels slide, and the arc-shaped through slots are offset from the mounting plate axis.

[0011] Preferably, the top of the support plate is equipped with a safety auxiliary mechanism, which includes a limiting arm mounted on the edge of the support plate via a hinge seat and a pin mounted on the edge of the support plate away from the hinge seat. The end of the limiting arm away from the hinge seat is provided with a positioning hole that matches the pin, and the end of the limiting arm away from the hinge seat is provided with a support portion that can contact the support plate.

[0012] Preferably, the slider includes a pair of sliding plates located above and below the mounting plate, respectively. The sliding plates are slidably connected to the mounting plate by a number of ball bearings, and the pair of sliding plates are connected by mounting bolts passing through a number of second strip-shaped through slots.

[0013] Preferably, the end of the U-shaped component is equipped with a plurality of guide bolts that slide through the connecting seat, and the length direction of the guide bolts is consistent with the sliding direction of the slider.

[0014] Preferably, a housing is mounted on the base.

[0015] According to the above technical solution, the piston ring elasticity testing device provided by this utility model has the following beneficial effects during use:

[0016] Firstly, during testing, there is no need to pay attention to the position of the piston ring opening. The piston ring can be tested regardless of its position, reducing the time required to place the piston ring. Furthermore, the piston ring is placed horizontally on the support plate, eliminating the need to adjust its specific position and improving testing efficiency.

[0017] Secondly, as several sets of sliding components disperse and converge, they can drive the piston ring to deform in two directions, making it highly practical and easy to operate.

[0018] Other features and advantages of this utility model will be described in detail in the following detailed description section; and all parts not covered in this utility model are the same as or can be implemented using existing technology. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 This is a three-dimensional structural diagram of a piston ring elasticity testing device provided in this utility model;

[0021] Figure 2 This is a partial three-dimensional structural diagram of a piston ring elasticity testing device provided in this utility model. Figure 1 ;

[0022] Figure 3 This is a partial three-dimensional structural diagram of a piston ring elasticity testing device provided in this utility model. Figure 2 ;

[0023] Figure 4 This is a partial three-dimensional structural diagram of a piston ring elasticity testing device provided in this utility model. Figure 3 ;

[0024] Figure 5 This is a three-dimensional structural diagram of the sliding component of a piston ring elasticity testing device provided in this utility model.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Base; 2. Central shaft; 3. Support plate; 4. Mounting plate; 5. Limiting shaft; 6. Rotary sleeve; 7. First strip-shaped through groove; 8. Second strip-shaped through groove; 9. Slider; 10. Connecting seat; 11. U-shaped part; 12. Guide wheel; 13. Pressure sensor; 14. Adjusting plate; 15. Ring rack; 16. Motor; 17. Arc-shaped through groove; 18. Limiting arm; 19. Pin; 20. Support part; 21. Guide bolt; 22. Housing. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0028] In this utility model, unless otherwise stated, directional words such as "upper," "lower," "inner," and "outer" included in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.

[0029] like Figure 1-5 As shown, a piston ring elasticity testing device includes: a base 1, a vertical central shaft 2 fixedly mounted on the base 1, a support plate 3 coaxially fixedly mounted on the top of the central shaft 2, a mounting plate 4 coaxially fixedly mounted on the central shaft 2 and located below the support plate 3, at least three sets of sliding components evenly distributed along the circumference of the mounting plate 4 and slidably connected to the mounting plate 4 along the corresponding radial direction, and a drive unit for bringing together or dispersing the several sets of sliding components;

[0030] The sliding assembly includes a pair of vertical limiting shafts 5 that are spaced apart along the sliding direction and both pass upward through the support disk 3. A rotating sleeve 6 is rotatably sleeved on the limiting shaft 5. The support disk 3 has several first strip-shaped through slots 7 through which the corresponding limiting shafts 5 pass.

[0031] In the above technical solution, the pair of rotating sleeves 6 can be divided into a first rotating sleeve located close to the axis of the support plate 3 and a second rotating sleeve located away from the axis of the support plate 3, depending on their position.

[0032] The piston ring is placed between the first and second rotating sleeves. The drive unit drives several sets of sliding components to disperse. The first rotating sleeve will contact the inner side of the piston ring. As the sliding components continue to slide away from the central axis 2, the piston ring can be opened. The first rotating sleeve is rotatably mounted on the limiting shaft 5, which is beneficial for the piston ring to deform when it is opened. If the rotating sleeve 6 is fixedly mounted on the limiting shaft 5, the piston ring will rub against the first rotating sleeve when it deforms, which will damage the piston ring. The rotatable rotating sleeve 6 can avoid friction between the first rotating sleeve and the piston ring and avoid damage to the piston ring.

[0033] The drive assembly then drives several sliding assemblies, and the deformation of the stretched piston ring will gradually decrease. As the sliding assembly continues to slide closer to the axis of the support plate 3, the first rotating sleeve separates from the piston ring, and the second rotating sleeve will contact the outer wall of the piston ring. Several second rotating sleeves will gather together to cause the piston ring to shrink and deform, and the opening on the piston ring will decrease. The rotatable second rotating sleeve has the same function as the rotatable sleeve 6, both of which can prevent damage to the piston ring.

[0034] During testing, there is no need to pay attention to the opening position of the piston ring. The piston ring can be tested regardless of the opening position, which reduces the time required to place the piston ring. Furthermore, the piston ring is placed horizontally on the support plate 3 without the need for specific position adjustments, thus improving testing efficiency.

[0035] As several sets of sliding components disperse and converge, the piston ring can be driven to deform in two directions. It is highly practical and easy to operate. After testing, the piston ring is removed and the size of the tested piston ring is inspected.

[0036] In a preferred embodiment of the present invention, a second strip groove 8 corresponding to a plurality of first strip grooves 7 is provided through the mounting plate 4, and the length direction of the second strip groove 8 is consistent with the radial direction corresponding to the mounting plate 4.

[0037] The sliding assembly also includes a slider 9 slidably mounted on the second strip groove 8 and fixedly connected to a pair of limiting shafts 5, a connecting seat 10 fixedly connected to the lower surface of the slider 9 and located below the mounting plate 4, a U-shaped piece 11 with its two ends located on both sides of the connecting seat 10, a guide wheel 12 mounted on the U-shaped piece 11 and connected to the drive unit, and a pair of pressure sensors 13 spaced along the length direction of the corresponding second strip groove 8 and respectively mounted on both ends of the U-shaped piece 11.

[0038] The distance between a pair of pressure sensors 13 is greater than the thickness of the connecting seat 10. The ends of the pressure sensors 13 are positioned facing the connecting seat 10. The connecting seat 10 is slidably connected to the connecting seat 10 along the sliding direction of the slider 9.

[0039] In the above technical solution, the pair of pressure sensors 13 can be divided into a first pressure sensor located close to the central axis 2 and a second pressure sensor located far from the central axis 2 according to their position distribution.

[0040] When the sliding assembly is in its initial position, the end of the second pressure sensor is in contact with the connecting seat 10. After the piston ring is placed between a pair of rotating sleeves 6, several sets of sliding assemblies disperse, and the U-shaped part 11 slides away from the central axis 2 until the first pressure sensor contacts the connecting seat 10, pushing the connecting seat 10 away from the central axis 2. This continues until several first rotating sleeves are in contact with the inner edge of the piston ring. The U-shaped part 11 continues to move away from the central axis 2, and the first rotating sleeves will push the piston ring to deform. At this time, the pressure value detected by the first pressure sensor will increase stepwise, so the dividing point when the piston ring deforms can be obtained. The position of the first dividing point can be obtained, and the distance that the U-shaped part 11 moves at this time is the test deformation of the piston ring expansion deformation test.

[0041] When the expansion deformation of the piston ring reaches the preset value, the U-shaped part 11 moves closer to the central axis 2. At this time, the expansion deformation of the piston ring will gradually decrease until the first rotating sleeve separates from the piston ring. The U-shaped part 11 continues to move closer to the central axis 2, the first pressure sensor separates from the connecting seat 10, and the end of the second pressure sensor contacts the connecting seat 10, pushing the connecting seat 10 to continue sliding until several second rotating sleeves contact the outer wall of the piston ring. The U-shaped part 11 continues to move closer to the central axis 2, and several second rotating sleeves will squeeze the piston ring. At this time, the pressure value detected by the second pressure sensor will increase stepwise. Therefore, the dividing point when the piston ring is squeezed and deformed can be obtained. At this time, the moving distance of the U-shaped part 11 is the test deformation amount when the piston ring is squeezed and deformed.

[0042] When the piston ring's compression deformation reaches a preset value, the U-shaped part 11 moves away from the central axis 2, and the piston ring's compression deformation gradually decreases. The second rotating sleeve separates from the outer wall of the piston ring. The U-shaped part 11 continues to move, the second pressure sensor separates from the connecting seat 10, and the end of the first pressure sensor contacts the connecting seat 10, thereby pushing the connecting seat 10 away from the central axis 2 until the first rotating sleeve contacts the inner wall of the piston ring. The U-shaped part 11 continues to move, which will cause the piston ring to expand and deform again. Then the pressure value detected by the first sensor will increase stepwise, thereby obtaining the boundary point of the piston ring's expansion and deformation at this time, obtaining the position of the second boundary point, and comparing the position of the first boundary point with the position of the second boundary point. The difference is the deformation value of the piston ring after the elasticity test.

[0043] Since the distance between the ends of a pair of pressure sensors 13 is fixed, the thickness of the connecting seat 10 is fixed, the minimum distance between a pair of rotating sleeves 6 is fixed, the distance between a pair of rotating sleeves 6 and the axis of the central shaft 2 when they are in the initial position is fixed, and the specifications of the piston rings are known, the real-time distance between the first and second rotating sleeves and the axis of the central shaft 2 can be obtained by controlling the movement distance of the U-shaped part 11 by the drive unit.

[0044] In a preferred embodiment of this utility model, the drive unit includes an adjustment disk 14 coaxially mounted on the central shaft 2 via a bearing and located below the mounting disk 4, an annular rack 15 coaxially mounted on the outer edge of the adjustment disk 14, a motor 16 mounted on the base 1, and a gear mounted on the output shaft of the motor 16 and meshing with the annular rack 15. The adjustment disk 14 is provided with a plurality of arc-shaped through slots 17 through which corresponding guide wheels 12 slide. The arc-shaped through slots 17 are offset from the mounting disk 4.

[0045] In the above technical solution, the motor 16 drives the ring rack 15 to rotate through the gear, which in turn drives the adjustment disk 14 to rotate. The position of the arc-shaped through groove 17 on the adjustment disk 14 moves, which can drive the U-shaped part 11 to slide through the guide wheel 12.

[0046] The motor 16 can be a stepper motor. The technology used in conjunction with the controller and driver is a mature existing technology. This allows us to determine the specific angle of rotation of the output shaft of the motor 16, thereby obtaining the real-time moving distance of the U-shaped part 11 and the real-time position of the U-shaped part 11.

[0047] In a preferred embodiment of the present invention, a safety auxiliary mechanism is mounted on the top of the support plate 3. The safety auxiliary mechanism includes a limiting arm 18 mounted on the edge of the support plate 3 via a hinge seat and a pin 19 mounted on the edge of the support plate 3 away from the hinge seat. A positioning hole matching the pin 19 is provided through the end of the limiting arm 18 away from the hinge seat. A support part 20 that can contact the support plate 3 is provided protruding from the end of the limiting arm 18 away from the hinge seat.

[0048] In the above technical solution, the limiting arm 18 can intercept the piston ring from jumping upward, preventing the piston ring from being thrown upward by force during the inspection process and causing damage to the inspectors.

[0049] In a preferred embodiment of the present invention, the slider 9 includes a pair of sliding plates located above and below the mounting plate 4, respectively. The sliding plates are slidably connected to the mounting plate 4 by a number of ball bearings, and the pair of sliding plates are connected by mounting bolts passing through a number of second strip-shaped through slots 8.

[0050] In a preferred embodiment of the present invention, a plurality of guide bolts 21 are fitted on the end of the U-shaped member 11, which slide through the connecting seat 10, and the length direction of the guide bolts 21 is consistent with the sliding direction of the slider 9.

[0051] In a preferred embodiment of the present invention, a housing 22 is mounted on the base 1.

[0052] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0054] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A piston ring elasticity testing device, characterized in that, include: The base (1), the vertical central shaft (2) fixedly mounted on the base (1), the support plate (3) fixedly mounted on the top of the central shaft (2) along the same axis, the mounting plate (4) fixedly mounted on the central shaft (2) along the same axis and located below the support plate (3), at least three sets of sliding components evenly distributed along the circumference of the mounting plate (4) and slidably connected to the mounting plate (4) along the corresponding radial direction of the mounting plate (4), and a drive unit for bringing together or dispersing several sets of sliding components; The sliding assembly includes a pair of vertical limiting shafts (5) spaced apart along the sliding direction and both passing upward through the support plate (3). A rotating sleeve (6) is rotatably sleeved on the limiting shaft (5). A plurality of first strip-shaped through slots (7) are provided through the support plate (3) for the corresponding limiting shafts (5) to pass through.

2. The piston ring elasticity testing device according to claim 1, characterized in that, The mounting plate (4) is provided with a second strip groove (8) corresponding to a plurality of first strip grooves (7), and the length direction of the second strip groove (8) is consistent with the radial direction corresponding to the mounting plate (4); The sliding assembly further includes a slider (9) slidably mounted on the second strip groove (8) and fixedly connected to a pair of limiting shafts (5), a connecting seat (10) fixedly connected to the lower surface of the slider (9) and located below the mounting plate (4), a U-shaped piece (11) with its two ends located on both sides of the connecting seat (10), a guide wheel (12) mounted on the U-shaped piece (11) and connected to the drive unit, and a pair of pressure sensors (13) spaced along the length direction of the corresponding second strip groove (8) and respectively mounted on both ends of the U-shaped piece (11). The distance between a pair of pressure sensors (13) is greater than the thickness of the connecting seat (10). The ends of the pressure sensors (13) are positioned toward the connecting seat (10). The connecting seat (10) is slidably connected to the connecting seat (10) along the sliding direction of the slider (9).

3. The piston ring elasticity testing device according to claim 2, characterized in that, The drive unit includes an adjustment plate (14) coaxially mounted on the central shaft (2) via a bearing and located below the mounting plate (4), an annular rack (15) coaxially mounted on the outer edge of the adjustment plate (14), a motor (16) mounted on the base (1), and a gear mounted on the output shaft of the motor (16) and meshing with the annular rack (15). The adjustment plate (14) is provided with a plurality of arc-shaped through slots (17) through which corresponding guide wheels (12) slide. The arc-shaped through slots (17) are offset from the mounting plate (4).

4. The piston ring elasticity testing device according to claim 1, characterized in that, The top of the support plate (3) is equipped with a safety auxiliary mechanism, which includes a limiting arm (18) mounted on the edge of the support plate (3) via a hinge seat and a pin (19) mounted on the edge of the support plate (3) away from the hinge seat. The end of the limiting arm (18) away from the hinge seat is provided with a positioning hole that matches the pin (19). The end of the limiting arm (18) away from the hinge seat is provided with a support part (20) that can contact the support plate (3).

5. A piston ring elasticity testing device according to claim 2, characterized in that, The slider (9) includes a pair of slide plates located above and below the mounting plate (4), respectively. The slide plates are slidably connected to the mounting plate (4) by a number of balls. The pair of slide plates are connected by mounting bolts passing through a number of second strip slots (8).

6. The piston ring elasticity testing device according to claim 2, characterized in that, The end of the U-shaped part (11) is equipped with several guide bolts (21) that slide through the connecting seat (10). The length direction of the guide bolts (21) is consistent with the sliding direction of the slider (9).

7. The piston ring elasticity testing device according to claim 1, characterized in that, The base (1) is fitted with a housing (22).

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