Air spring piston bearing strength detection device

Abstract

The invention discloses an air spring piston bearing strength detection device, and relates to the technical field of air spring piston detection, the air spring piston bearing strength detection device comprises an operation table and a piston assembly, and further comprises a detection mechanism, and the detection mechanism comprises an air charging and discharging part, a pressure sensor and a pressing part; the detection end of the pressure sensor penetrates through the operation table and extends into an inner cavity of the piston assembly, and a controller electrically connected with the pressure sensor is installed on one side edge of the operation table. Through the arrangement of the detection mechanism, air is continuously injected into the inner cavity of the piston assembly through the air charging and discharging component, the pressure intensity in the lower cavity of the piston assembly is increased, the steel piston is pressed to form upward jacking force on the baffle, and bolts connected between the baffle and the partition piece are reversely pulled; therefore, whether the pressure bearing degree of the steel piston is qualified or not can be conveniently, specifically and intuitively detected by a worker only by simply observing whether the bolt is loosened when the air pressure of the lower cavity reaches 2.0 MPa, and the detection effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of air spring piston detection, and in particular to a device for detecting the pressure-bearing strength of an air spring piston. Background Art

[0002] The strength test of air spring piston mainly involves multiple aspects, including material performance test, structural integrity test and specific test methods. Among them, the material performance test requires that the steel piston can withstand an air pressure of 2.0MPa. Figure 3 As shown, the existing piston assembly 2 is built with a partition 3, which divides the interior of the piston assembly 2 into an upper and lower chamber. The upper chamber is provided with a baffle 4 fixedly connected to the partition 3 by bolts, and the lower chamber is provided with a steel piston 6, on which a piston rod 5 is fixed, and the piston rod 5 passes through the partition 3 and is fixedly connected to the baffle 4;

[0003] As can be seen from the above figure, when the piston assembly 2 is actually used for shock absorption, the steel piston 6 is often subjected to the gas pressure to form an upward force on the baffle 4, so that the baffle 4 forms a counter-tension force on the bolts between it and the partition 3. In order to prevent the bolts from loosening or breaking under high-strength tension, which affects the stability of the steel piston 6 in the piston assembly 2, it is necessary to test the pressure-bearing strength of the steel piston 6 when the piston assembly 2 is produced;

[0004] However, the prior art can only use a tensile testing machine to detect the tensile strength of the bolts alone, and indirectly determine the pressure-bearing degree of the steel piston 6, but there is no separate testing equipment to actually test the pressure-bearing degree of the steel piston 6 in the piston assembly 2, which leads to the test results being vague and unsatisfactory, affecting the product quality reliability. Summary of the invention

[0005] In order to solve the above technical problems, an air spring piston pressure strength detection device is provided, which solves the problem that in the prior art, only the tensile strength of the bolts can be detected separately by a tensile testing machine, and the pressure bearing degree of the steel piston can be relatively determined, but there is no separate testing equipment to actually test the pressure bearing degree of the steel piston after the bolts are assembled in the piston assembly, which leads to the problem that the test result is not specific and ideal, affecting the reliability of product quality.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: an air spring piston pressure strength detection device, including an operating table and a piston assembly arranged on the operating table, and also including a detection mechanism for testing the pressure strength of a steel piston built into the piston assembly;

[0007] The detection mechanism includes a gas filling and deflation component arranged below the operating table, a pressure sensor installed on the bottom surface of the operating table, and a pressing component arranged outside the piston assembly. The detection end of the pressure sensor passes through the operating table and extends into the inner cavity of the piston assembly. A controller electrically connected to the pressure sensor is installed on one side of the operating table.

[0008] The clamping component includes two slide seats symmetrically slidably arranged on the operating table in the form of a rectangular frame, a notch is arranged on the top of the slide seat, a positioning plate is built in the notch, the piston assembly is located between the two positioning plates, and a pressure groove is opened in the inner wall at the end of the positioning plate, a pressure block fixedly connected to the outer wall of the piston assembly is arranged in the pressure groove, and a reverse acting component is also arranged between the two slide seats, and a push-pull component is arranged on the side of one of the positioning plates away from the piston assembly;

[0009] The air adding and releasing components include two support plates symmetrically fixed on the bottom surface of the operating table, a fixed sleeve fixed between the two support plates, and a switching assembly matched with one of the sliding seats, the top end of the fixed sleeve is fixedly penetrated by an air injection pipe, the top end of the air injection pipe penetrates the operating table and enters the piston assembly, and the bottom end of the fixed sleeve is fixedly penetrated by an air adding pipe.

[0010] Preferably, the reverse acting component comprises two staggered transmission racks, the ends of the two transmission racks away from each other are respectively fixedly connected to the two corresponding slide seats, and a transmission gear is meshed between the two transmission racks, and the transmission gear is rotatably connected to the top surface of the operating table through a rotating shaft.

[0011] Preferably, the push-pull assembly includes a bearing seat vertically fixed at the edge of the top surface of the operating table and a power screw laterally rotatably arranged in the inner wall of the bearing seat, and an internally threaded pipe sleeve fixedly connected to one of the positioning plates is threadedly connected to the outer wall of one end of the power screw.

[0012] Preferably, the switching assembly includes a movable rotating cylinder rotatably disposed in the fixed sleeve, and air holes are provided at both upper and lower ends of the movable rotating cylinder. The upper air hole is connected to the air injection pipe correspondingly, and the lower air hole is connected to the air filling pipe correspondingly. A short ventilation tube corresponding to the lower air hole is fixed on the inner wall of the movable rotating cylinder, and a one-way valve is built into the short ventilation tube, and the output port of the one-way valve faces the inner side of the movable rotating cylinder.

[0013] Preferably, the switching assembly further comprises a control lever rotatably disposed on the inner side of the support plate and fixedly connected to the movable rotating cylinder, wherein a power component is disposed between one of the support plates and one of the slide seats.

[0014] Preferably, the power component includes a control gear fastened to one of the support plate rods, a control tooth plate meshing with the control gear is fixed on the bottom surface of one of the slide seats, and the number of teeth on the control tooth plate is half the number of teeth on the control gear.

[0015] Preferably, the longitudinal section of the pressure groove is a right-angled trapezoidal shape, and the end of the pressure block abuts against the oblique inner wall of the pressure groove.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) Through the setting of the detection mechanism, air is continuously injected into the inner cavity of the piston assembly by using the air adding and releasing components to increase the pressure in the lower cavity of the piston assembly, so that the steel piston forms an upward force on the baffle plate under pressure, and pulls back the bolts connecting the baffle plate and the partition. In this way, it is only necessary to simply observe whether the bolts are loose when the air pressure in the lower chamber reaches 2.0 MPa, which is convenient for manual inspection to more specifically and intuitively detect whether the pressure bearing degree of the steel piston is qualified, thereby improving the detection effect.

[0018] (2) By setting the clamping component, the push-pull component is used to apply a thrust to one of the positioning plates and the slide seat as a whole, so that the positioning plate and the slide seat as a whole can slide toward the piston assembly. During this process, the other positioning plate and the slide seat as a whole can be synchronously slid toward the piston assembly under the action of the reverse acting component, so that the pressure block on the piston assembly is inserted into the inner side of the pressure groove on the positioning plate, and the piston assembly is positioned. In addition, during the extension of the pressure block inside the pressure groove, its end continuously contacts the inclined edge of the pressure groove, thereby exerting a downward force on the piston assembly, thereby increasing the fit between the piston assembly and the operating table and enhancing the sealing inside the piston assembly.

[0019] (3) By setting the switching component, under the premise of not affecting the normal use of the blower to pressurize the lower chamber of the piston assembly, after the test is completed, the push-pull component is used to act on the two slides to move away from the piston assembly in the opposite direction, so that the movable rotating cylinder rotates half a circle in the opposite direction on the inner side of the fixed sleeve, and the ventilation short pipe corresponds to the connected air injection pipe, and the output port of the one-way valve is adjusted. At this time, the one-way valve can automatically open under the pressure difference between the inside of the ventilation short pipe and the inside of the lower chamber of the piston assembly, and the lower chamber of the piston assembly is automatically deflated, thereby improving work efficiency and facilitating the later removal of the piston assembly, thereby avoiding the piston assembly being adsorbed on the operating table with strong pressure and difficult to separate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of one side of the present invention;

[0021] Figure 2 It is a schematic diagram of the overall lower structure of the present invention;

[0022] Figure 3It is a schematic diagram of the internal structure of the piston assembly, the fixed sleeve and the movable rotating cylinder of the present invention;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the structure at point A in the middle.

[0024] The numbers in the figure are:

[0025] 1. Operating table; 2. Piston assembly; 3. Separator; 4. Baffle; 5. Piston rod; 6. Steel piston; 7. Gas injection pipe; 8. Pressure sensor; 9. Controller; 10. Slide; 11. Positioning plate; 12. Pressurization groove; 13. Pressure block; 14. Transmission rack; 15. Transmission gear; 16. Internal threaded pipe sleeve; 17. Power screw; 18. Bearing seat; 19. Support plate; 20. Fixed sleeve; 21. Movable rotating cylinder; 22. Gas filling pipe; 23. Ventilation short pipe; 24. One-way valve; 25. Control lever; 26. Control gear; 27. Control gear plate. DETAILED DESCRIPTION

[0026] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0027] Reference Figure 1-4 As shown, a device for testing the pressure bearing strength of an air spring piston comprises an operating table 1 and a piston assembly 2 arranged on the operating table 1, wherein the piston assembly 2 is provided with a partition 3, and the partition 3 divides the interior of the piston assembly 2 into an upper and lower chamber, wherein a baffle 4 fixedly connected to the partition 3 by bolts is provided in the upper chamber, and a steel piston 6 is provided in the lower chamber, and a piston rod 5 is fixed on the steel piston 6, and the piston rod 5 passes through the partition 3 and is fixedly connected to the baffle 4, and further comprises a testing mechanism for testing the pressure bearing strength of the steel piston built in the piston assembly 2;

[0028] The detection mechanism includes a gas filling and deflation component arranged below the operating table 1 and a pressure sensor 8 installed on the bottom surface of the operating table 1. The detection end of the pressure sensor 8 passes through the operating table 1 and extends into the inner cavity of the piston assembly 2. A controller 9 electrically connected to the pressure sensor 8 is installed on one side of the operating table 1.

[0029] By setting up the detection mechanism, the air is continuously injected into the inner cavity of the piston assembly 2 by using the air adding and releasing components to increase the pressure in the lower cavity of the piston assembly 2, so that the steel piston 6 forms an upward force on the baffle 4 under pressure, and pulls back the bolts connecting the baffle 4 and the partition 3. In this way, it is only necessary to simply observe whether the bolts are loose when the air pressure in the lower chamber reaches 2.0MPa, which is convenient for manual inspection to more specifically and intuitively detect whether the pressure bearing degree of the steel piston 6 is qualified, thereby improving the detection effect;

[0030] Through the setting of pressure sensor 8 and controller 9, when the air adding and deflation components continue to inject air into the inner cavity of piston assembly 2, pressure sensor 8 can monitor the pressure in the lower chamber of piston assembly 2 in real time and transmit the signal to controller 9, which displays the actual pressure value for the convenience of test personnel to grasp.

[0031] Further, refer to Figure 1-4 As shown, it is worth noting that the air filling and deflation component includes two support plates 19 symmetrically fixed on the bottom surface of the operating table 1 and a fixed sleeve 20 fixed between the two support plates 19, the top end of the fixed sleeve 20 is fixedly penetrated by an air injection pipe 7, the top end of the air injection pipe 7 penetrates the operating table 1 and enters the piston assembly 2, and the bottom end of the fixed sleeve 20 is fixedly penetrated by an air filling pipe 22;

[0032] By setting up the gas filling pipe 22 and the gas injection pipe 7, the gas filling pipe 22 is connected to an external blower, and the blower is turned on. The gas output by the blower can be passed into the lower chamber of the piston assembly 2 through the gas filling pipe 22, the fixed sleeve 20 and the gas injection pipe 7 in sequence, thereby achieving the effect of increasing the air pressure in the lower chamber of the piston assembly 2.

[0033] In addition, refer to Figure 1-3 As shown, it is worth noting that the detection mechanism also includes a pressing component arranged on the outside of the piston assembly 2;

[0034] The clamping component includes two slides 10 symmetrically slidably arranged on the operating table 1 in the form of a rectangular frame, a notch is arranged on the top of the slide 10, a positioning plate 11 is arranged inside the notch, the piston assembly 2 is located between the two positioning plates 11, and a pressure groove 12 is opened in the inner wall at the end of the positioning plate 11, a pressure block 13 fixedly connected to the outer wall of the piston assembly 2 is arranged in the pressure groove 12, and a reverse acting component is also arranged between the two slides 10, and a push-pull component is arranged on the side of one positioning plate 11 away from the piston assembly 2;

[0035] The longitudinal section of the pressure groove 12 is a right-angled trapezoidal shape, and the end of the pressure block 13 abuts against the oblique inner wall of the pressure groove 12;

[0036] By setting the clamping component, after the piston assembly 2 is placed on the operating table 1, the push-pull component is used to apply a thrust to one of the positioning plates 11 and the slide seat 10 as a whole, so that the positioning plate 11 and the slide seat 10 as a whole slide toward the piston assembly 2. During this process, the other positioning plate 11 and the slide seat 10 as a whole can be synchronously slid toward the piston assembly 2 under the action of the reverse acting component, so that the pressure block 13 on the piston assembly 2 is inserted into the inner side of the pressurizing groove 12 on the positioning plate 11, and the piston assembly 2 is positioned. In addition, during the extension of the pressure block 13 inside the pressurizing groove 12, its end continues to resist the oblique edge of the pressurizing groove 12, thereby forming a downward force on the piston assembly 2, thereby increasing the fit between the piston assembly 2 and the operating table 1, and enhancing the sealing inside the piston assembly 2.

[0037] Further, refer to Figure 1 As shown, it is worth noting that the reverse acting assembly includes two staggered transmission racks 14, the ends of the two transmission racks 14 that are far away from each other are respectively fixed to the two slide seats 10, and a transmission gear 15 is meshed between the two transmission racks 14, and the transmission gear 15 is rotatably connected to the top surface of the operating table 1 through a rotating shaft;

[0038] The push-pull assembly includes a bearing seat 18 vertically fixed to the edge of the top surface of the operating table 1 and a power screw 17 rotatably arranged in the inner wall of the bearing seat 18. An inner threaded sleeve 16 fixedly connected to one of the positioning plates 11 is threadedly connected to the outer wall of one end of the power screw 17.

[0039] By turning the knob power screw 17, the internal threaded sleeve 16 can slide along the rod of the power screw 17 under the threaded structure, and then push and pull one of the positioning plates 11 and the slide seat 10 as a whole, so that the positioning plate 11 and the slide seat 10 as a whole slide toward the piston assembly 2. During this process, the above-mentioned slide seat 10 pushes the corresponding transmission gear 15 to slide and mesh with the transmission gear 15. The transmission gear 15 is rotated under force and meshes with the transmission rack 14 corresponding to the other slide seat 10, thereby causing the other slide seat 10 and the positioning plate 11 to slide synchronously in the opposite direction as a whole and slide toward the piston assembly 2.

[0040] Further, refer to Figure 2-4 As shown, it is worth noting that the air adding and deflation component also includes a switching assembly that cooperates with one of the slide seats 10;

[0041] The switching assembly includes a movable rotating cylinder 21 rotatably disposed in a fixed sleeve 20. Air holes are provided at both the upper and lower ends of the movable rotating cylinder 21. The upper air hole is connected to the air injection pipe 7 correspondingly, and the lower air hole is connected to the air filling pipe 22 correspondingly. A short ventilation tube 23 connected to the lower air hole is fixed on the inner wall of the movable rotating cylinder 21. A one-way valve 24 is built in the short ventilation tube 23. The output port of the one-way valve 24 faces the inner side of the movable rotating cylinder 21.

[0042] The switching assembly also includes a control lever 25 rotatably disposed inside the support plate 19 and fixedly connected to the movable rotating drum 21, wherein a power component is disposed between one of the support plates 19 and one of the slide seats 10;

[0043] The power component includes a control gear 26 which is fastened to the rod of one of the support plates 19, and a control tooth plate 27 which meshes with the control gear 26 is fixed on the bottom surface of one of the slide seats 10, and the number of teeth of the control tooth plate 27 is half the number of teeth of the control gear 26;

[0044] Through the setting of the switching component, as shown above, in the process of using the push-pull component to make the two slide seats 10 and the positioning plate 11 slide in opposite directions and position and compress the piston assembly 2, one of the slide seats 10 can carry the control tooth plate 27 to synchronously move and pass through the control gear 26 during the sliding process, and the control tooth plate 27 engages with the control gear 26, so that the movable rotating cylinder 21 rotates half a circle inside the fixed sleeve 20, so that the ventilation short pipe 23 is correspondingly connected to the gas filling pipe 22, so that when the gas filling pipe 22 is connected to the blower to inject gas into the gas filling pipe 22, the one-way valve 24 is opened by the air pressure, and the gas can be normally pressurized by the gas injection pipe 7 to the lower chamber of the piston assembly 2;

[0045] And by using the one-way valve 24, after the lower chamber of the piston assembly 2 is pressurized and the connection between the gas filling pipe 22 and the blower is disconnected, the one-way valve 24 quickly closes the inside of the ventilation short pipe 23, which can effectively prevent the gas from flowing back and keep the pressure inside the lower chamber of the piston assembly 2 constant;

[0046] On the contrary, after the test is completed, the push-pull component is used to force the two slide seats 10 to move away from the piston assembly 2 in the opposite direction, and the positioning and clamping effect on the piston assembly 2 is released. Similarly, the control tooth plate 27 can engage the control gear 26 in the opposite direction during this process, and the movable rotating cylinder 21 is driven to rotate half a circle in the opposite direction on the inner side of the fixed sleeve 20, so that the ventilation short tube 23 corresponds to the connected air injection pipe 7, and the output port of the one-way valve 24 is turned. At this time, the pressure difference between the inside of the ventilation short tube 23 and the inside of the lower chamber of the piston assembly 2 is used, and the one-way valve 24 is automatically opened under the pressure difference, and the lower chamber of the piston assembly 2 is automatically deflated, thereby improving work efficiency and facilitating the later removal of the piston assembly 2, thereby preventing the piston assembly 2 from being strongly adsorbed on the operating table 1 and difficult to separate.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. An air spring piston pressure strength testing device, comprising an operating table (1) and a piston assembly (2) arranged on the operating table (1), characterized in that: It also includes a detection mechanism for testing the pressure-bearing strength of the steel piston built into the piston assembly (2); The detection mechanism comprises an air filling and releasing component arranged below the operating table (1), a pressure sensor (8) installed on the bottom surface of the operating table (1), and a pressing component arranged on the outside of the piston assembly (2); the detection end of the pressure sensor (8) passes through the operating table (1) and extends into the inner cavity of the piston assembly (2); a controller (9) electrically connected to the pressure sensor (8) is installed on one side of the operating table (1); The clamping component comprises two slide seats (10) symmetrically slidably arranged on the operating table (1) in the form of a rectangular frame, a notch is arranged on the top of the slide seat (10), a positioning plate (11) is built in the notch, the piston assembly (2) is located between the two positioning plates (11), and a pressure groove (12) is opened in the inner wall at the end of the positioning plate (11), a pressure block (13) fixedly connected to the outer wall of the piston assembly (2) is arranged in the pressure groove (12), and a reverse acting component is also arranged between the two slide seats (10), and a push-pull component is arranged on the side of one of the positioning plates (11) away from the piston assembly (2); The air filling and deflation component comprises two support plates (19) symmetrically fixed on the bottom surface of the operating table (1), a fixed sleeve (20) fixed between the two support plates (19), and a switching component matched with one of the slide seats (10); a gas injection pipe (7) is fixedly passed through the top end of the fixed sleeve (20); the top end of the gas injection pipe (7) passes through the operating table (1) and penetrates into the piston assembly (2); and a gas filling pipe (22) is fixedly passed through the bottom end of the fixed sleeve (20).

2. The air spring piston pressure strength detection device according to claim 1, characterized in that: The reverse acting assembly comprises two transmission racks (14) which are arranged in an interlaced manner, the ends of the two transmission racks (14) which are far away from each other are respectively fixedly connected to the two slide seats (10), and a transmission gear (15) is meshed between the two transmission racks (14), and the transmission gear (15) is rotatably connected to the top surface of the operating table (1) via a rotating shaft.

3. The air spring piston pressure strength detection device according to claim 1, characterized in that: The push-pull assembly comprises a bearing seat (18) vertically fixed to the edge of the top surface of the operating table (1) and a power screw (17) rotatably arranged in the inner wall of the bearing seat (18), and an internal threaded sleeve (16) fixedly connected to one of the positioning plates (11) is threadedly connected to the outer wall of one end of the power screw (17).

4. The air spring piston pressure strength detection device according to claim 1, characterized in that: The switching assembly comprises a movable rotating cylinder (21) rotatably arranged in the fixed sleeve (20), and air holes are provided at both the upper and lower ends of the movable rotating cylinder (21), the upper air hole is connected to the air injection pipe (7) correspondingly, and the lower air hole is connected to the air filling pipe (22) correspondingly, and a short ventilation tube (23) correspondingly connected to the lower air hole is fixed on the inner wall of the movable rotating cylinder (21), and a one-way valve (24) is built in the short ventilation tube (23), and the output port of the one-way valve (24) faces the inner side of the movable rotating cylinder (21).

5. The air spring piston pressure strength detection device according to claim 4, characterized in that: The switching assembly further comprises a control lever (25) rotatably arranged on the inner side of the support plate (19) and fixedly connected to the movable rotating cylinder (21), wherein a power component is arranged between one of the support plates (19) and one of the slide seats (10).

6. The air spring piston pressure strength detection device according to claim 5, characterized in that: The power component comprises a control gear (26) which is tightly sleeved on a rod of one of the support plates (19); a control tooth plate (27) which meshes with the control gear (26) is fixed on the bottom surface of one of the slide seats (10); the number of teeth of the control tooth plate (27) is half the number of teeth of the control gear (26).

7. The air spring piston pressure strength detection device according to claim 1, characterized in that: The longitudinal section of the pressure groove (12) is in the shape of a right-angled trapezoid, and the end of the pressure block (13) abuts against the oblique inner wall of the pressure groove (12).

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