Piston shaft fall gauge

Abstract

The utility model relates to the technical field of piston shafts, and discloses a piston shaft fall gauge, which comprises a bottom plate, the top of the bottom plate is fixedly connected with a mounting block, the top of the mounting block is fixedly connected with a dial indicator, the top of the mounting block is fixedly connected with a connecting piece, and the top of the connecting piece is provided with a guide groove. The inner wall of the guide groove is fixedly connected with a rubber layer, and the inner wall of the guide groove is slidably connected with a piston shaft body. According to the utility model, the piston shaft body is placed on the inner wall of the guide groove, then the two fixing pieces are rotated to fix the piston shaft body, and then the displacement sensor drives the measuring rod to move downwards at the same time, so that the bottom end of the measuring rod is in contact with the top of the calibration piece, the measuring rod does not need to be placed manually, and the detection efficiency is further improved; and meanwhile, the dial indicator is used for reading, so that the detection result is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of piston shafts, in particular to a piston shaft drop gauge. Background Art

[0002] The piston shaft is an important part of the piston. The piston usually plays a role in mechanical equipment such as engines and compressors. It makes reciprocating motions in the cylinder, converting the energy generated by fuel combustion or the externally input energy into mechanical work. The piston shaft generally connects the piston head and the piston pin, playing a role in transmitting force and motion. Before the piston shaft is put into use, it is necessary to detect its drop. Detecting the drop problem of the piston shaft in advance can be adjusted or replaced in the early stage to avoid more serious damage caused by failures during the operation of the equipment.

[0003] However, when the existing piston shaft drop gauges detect the piston shaft, most of them are manually operated. However, the manual operation speed is relatively slow. Especially when a large number of piston shafts need to be detected, it is difficult to meet the requirements of high-efficiency production. For this reason, a piston shaft drop gauge is proposed to solve the above problems. Summary of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a piston shaft drop gauge, aiming to improve the problem that when the existing piston shaft drop gauges detect the piston shaft, most of them are manually operated, resulting in difficulty in meeting the requirements of high-efficiency production.

[0005] To achieve the above object, the utility model adopts the following technical scheme: A piston shaft drop gauge, including a bottom plate, a mounting block is fixedly connected to the top of the bottom plate, a dial indicator is fixedly connected to the top of the mounting block, a connecting piece is fixedly connected to the top of the mounting block, a guide groove is opened at the top of the connecting piece, a rubber layer is fixedly connected to the inner wall of the guide groove, a piston shaft body is slidably connected to the inner wall of the guide groove, two fixing pieces are externally threaded to the mounting block, a cylinder is fixedly connected to the outside of the mounting block, a telescopic rod is fixedly connected to the output end of the cylinder, a displacement sensor is fixedly connected to the other end of the telescopic rod, a measuring rod is fixedly connected to the bottom of the displacement sensor, and a blowing assembly is installed on the top of the bottom plate, and the blowing assembly is used to blow air into the guide groove.

[0006] As a further description of the above technical solution:

[0007] The blowing component includes a motor, the bottom of the motor is fixedly connected to the top of the bottom plate, the output end of the motor is fixedly connected to a transmission rod, the other end of the transmission rod is fixedly connected to an eccentric wheel, the top of the bottom plate is fixedly connected to a support member, the inner wall of the support member is slidably connected to a piston member, the outside of the piston member is fixedly connected to a T-shaped rod, a spring is sleeved outside the T-shaped rod, and an air outlet groove is opened on the inner wall of the support member.

[0008] As a further description of the above technical solution:

[0009] The top of the bottom plate is fixedly connected with a limit seat, the top of the limit seat is slidably connected with a calibration member, and the top of the calibration member is slidably connected with the bottom of the measuring rod.

[0010] As a further description of the above technical solution:

[0011] One end of the fixing member is slidably connected to the outside of the rubber layer, and the other end of the fixing member is fixedly connected with an irregular convex block.

[0012] As a further description of the above technical solution:

[0013] Damping feet are arranged at the four corners of the bottom of the bottom plate, and two pull rods are fixedly connected to the top of the bottom plate.

[0014] As a further description of the above technical solution:

[0015] One end of the spring is fixedly connected to the outside of the support member, and the other end of the spring is fixedly connected to the inside of the T-shaped rod.

[0016] As a further description of the above technical solution:

[0017] A one-way valve one is fixedly connected to the outside of the piston member, and a one-way valve two is fixedly connected to the inner wall of the support member.

[0018] As a further description of the above technical solution:

[0019] Two air inlet grooves are opened on the outside of the support member.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, by placing the piston shaft body on the inner wall of the guide groove, then rotating the two fixing members to fix the piston shaft body, and then the displacement sensor drives the measuring rod to move downward at the same time, so that the bottom end thereof contacts with the top of the calibration member, without manual placement of the measuring rod, further improving the detection efficiency. Then the measuring rod transmits the displacement information to the displacement sensor, and at the same time reads the value through the micrometer, making the detection result more accurate.

[0022] 2. In the present utility model, the motor drives the eccentric wheel to rotate through the transmission rod. When the convex part of the eccentric wheel contacts the outer side of the T-shaped rod, the check valve II is closed and the check valve I is opened, and air blows through the air outlet groove towards the guide groove to remove dust on the contact surface, reducing the detection error. When the concave part of the eccentric wheel contacts the outer side of the T-shaped rod, the check valve I is opened and the check valve II is closed. At this time, air enters the interior of the support member through the check valve I. Description of the Drawings

[0023] Figure 1 Stereogram of a piston shaft drop gauge proposed by the present utility model;

[0024] Figure 2 Schematic structural diagram of the fixing member of a piston shaft drop gauge proposed by the present utility model;

[0025] Figure 3 Schematic structural diagram of the mounting block of a piston shaft drop gauge proposed by the present utility model;

[0026] Figure 4 Cross-sectional view of the support member of a piston shaft drop gauge proposed by the present utility model

[0027] Figure 5 is Figure 3 Enlarged view of part A in

[0028] Legend:

[0029] 1. Bottom plate; 2. Mounting block; 3. Micrometer; 4. Connecting piece; 5. Measuring rod; 6. Displacement sensor; 7. Cylinder; 8. Support member; 9. Spring; 10. T-shaped rod; 11. Motor; 12. Eccentric wheel; 13. Transmission rod; 14. Limit seat; 15. Calibration piece; 16. Fixing piece; 17. Piston shaft body; 18. Rubber layer; 19. Guide groove; 20. Piston piece; 21. Check valve I; 22. Check valve II; 23. Air outlet groove; 24. Shock-absorbing floor feet. Detailed Embodiment

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer to Figure 1 、 Figure 2 and Figure 5, an embodiment provided by the present utility model: a piston shaft drop detector, including a bottom plate 1, a mounting block 2 is fixedly connected to the top of the bottom plate 1, a dial indicator 3 is fixedly connected to the top of the mounting block 2, a connecting piece 4 is fixedly connected to the top of the mounting block 2, a guide groove 19 is opened at the top of the connecting piece 4, a rubber layer 18 is fixedly connected to the inner wall of the guide groove 19, a piston shaft body 17 is slidably connected to the inner wall of the guide groove 19, two fixing pieces 16 are threadedly connected to the outside of the mounting block 2, a cylinder 7 is fixedly connected to the outside of the mounting block 2, a telescopic rod is fixedly connected to the output end of the cylinder 7, a displacement sensor 6 is fixedly connected to the other end of the telescopic rod, a measuring rod 5 is fixedly connected to the bottom of the displacement sensor 6, and a blowing assembly is installed on the top of the bottom plate 1, and the blowing assembly is used to blow air into the guide groove 19.

[0032] Further, first place the piston shaft body 17 inside the guide groove 19, then rotate the two fixing pieces 16, clamp the rubber layer 18, and then fix the piston shaft body 17 to prevent rotation during detection and affect the detection accuracy. Then place the calibration piece 15 at the designated position on the top of the connecting piece 4, and then start the cylinder 7, so that the cylinder 7 drives the displacement sensor 6 to move downward through the telescopic rod, and then drives the measuring rod 5 to move downward at the same time, so that the bottom end of the measuring rod 5 contacts the top of the calibration piece 15, eliminating the need for manual placement, thereby improving the detection efficiency. Then the measuring rod 5 transmits the displacement information to the displacement sensor 6, and at the same time reads the value through the dial indicator 3, making the detection result more accurate.

[0033] Refer to Figure 1 , Figure 2 and Figure 4 , the blowing assembly includes a motor 11, the bottom of the motor 11 is fixedly connected to the top of the bottom plate 1, a transmission rod 13 is fixedly connected to the output end of the motor 11, an eccentric wheel 12 is fixedly connected to the other end of the transmission rod 13, a support member 8 is fixedly connected to the top of the bottom plate 1, a piston member 20 is slidably connected to the inner wall of the support member 8, a T-shaped rod 10 is fixedly connected to the outside of the piston member 20, a spring 9 is sleeved on the outside of the T-shaped rod 10, an air outlet groove 23 is opened on the inner wall of the support member 8; one end of the spring 9 is fixedly connected to the outside of the support member 8, and the other end of the spring 9 is fixedly connected to the inner side of the T-shaped rod 10; a one-way valve one 21 is fixedly connected to the outside of the piston member 20, and a one-way valve two 22 is fixedly connected to the inner wall of the support member 8; two air inlet grooves are opened on the outside of the support member 8.

[0034] Furthermore, after the detection is completed, the motor 11 is started. The motor 11 drives the transmission rod 13 to rotate, and then drives the eccentric wheel 12 to rotate simultaneously. When the protruding part of the eccentric wheel 12 contacts the outer side of the T-shaped rod 10, it drives the piston member 20 to slide along the inner wall of the support member 8. At this time, the check valve two 22 is closed and the check valve one 21 is opened. The air blows towards the guide groove 19 through the air outlet groove 23. Cleaning is carried out before each detection to keep the detection conditions consistent, thereby improving the repeatability and reliability of the detection results. When the concave part of the eccentric wheel 12 contacts the outer side of the T-shaped rod 10, under the elastic force of the spring 9, the T-shaped rod 10 drives the piston member 20 to slide. At this time, the check valve one 21 is opened and the check valve two 22 is closed. At this time, the air enters the inside of the support member 8 through the check valve one 21; the spring 9 is limited by the support member 8 and the T-shaped rod 10 to prevent deformation due to uneven force distribution; the intake and blowing are separated through the check valve one 21 and the check valve two 22; the role of the intake groove is to prevent the internal and external pressures of the support member 8 from being inconsistent.

[0035] Refer to Figure 1 、 Figure 2 and Figure 3 As shown in

[0036] Furthermore, the calibration member 15 is placed through the limit seat 14, which is convenient for storage and access. The bottom of the measuring rod 5 contacts the top of the calibration member 15, and then the detection drop is carried out; the two fixing members 16 fix the piston member body 20 by squeezing the rubber layer 18 to ensure the accuracy of the detection. The irregular convex block facilitates the user to rotate the fixing member 16; the four shock-absorbing feet 24 are evenly dispersed and bear the weight of the inspection tool, and provide stable support and shock-absorbing effects. The role of the pull rod is to facilitate the user to move the inspection tool.

[0037] Working principle: First, place the piston shaft body 17 inside the guide groove 19, and then rotate the two fixing members 16 to fix the piston shaft body 17 to prevent rotation during detection and affect the detection accuracy. Then place the calibration member 15 at the specified position on the top of the connecting member 4, and then start the cylinder 7. The cylinder 7 drives the displacement sensor 6 to move downward through the telescopic rod, and then drives the measuring rod 5 to move downward at the same time, so that the bottom end of the measuring rod 5 contacts the top of the calibration member 15. There is no need for manual placement, which saves time and makes the detection more rapid. Then the measuring rod 5 transmits the displacement information to the displacement sensor 6, and at the same time reads the value through the micrometer 3, making the detection result more accurate.

[0038] In addition, after the detection is completed, the motor 11 is started. The motor 11 drives the eccentric wheel 12 to rotate through the transmission rod 13. When the protruding part of the eccentric wheel 12 contacts the outer side of the T-shaped rod 10, the T-shaped rod 10 drives the piston member 20 to slide along the inner wall of the support member 8. At this time, the check valve two 22 is closed and the check valve one 21 is opened. The air blows towards the guide groove 19 through the air outlet groove 23 to remove dust, debris and fine particles on the contact surface, ensuring that the piston shaft body 17 is completely attached to the contact surface, reducing the detection error. When the concave part of the eccentric wheel 12 contacts the outer side of the T-shaped rod 10, under the elastic force of the spring 9, the T-shaped rod 10 drives the piston member 20 to slide. At this time, the check valve one 21 is opened and the check valve two 22 is closed. At this time, the air enters the inside of the support member 8 through the check valve one 21.

[0039] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A piston shaft drop gauge, comprising a bottom plate (1), characterized in that: The top of the base plate (1) is fixedly connected to a mounting block (2), the top of the mounting block (2) is fixedly connected to a micrometer (3), the top of the mounting block (2) is fixedly connected to a connector (4), the top of the connector (4) is provided with a guide groove (19), the inner wall of the guide groove (19) is fixedly connected to a rubber layer (18), the inner wall of the guide groove (19) is slidably connected to a piston shaft body (17), the outer surface of the mounting block (2) is threadedly connected to two fixing members (16), the outer side of the mounting block (2) is fixedly connected to a cylinder (7), the output end of the cylinder (7) is fixedly connected to a telescopic rod, the other end of the telescopic rod is fixedly connected to a displacement sensor (6), the bottom of the displacement sensor (6) is fixedly connected to a measuring rod (5), and the top of the base plate (1) is installed with a blowing assembly, the blowing assembly is used to blow air into the guide groove (19).

2. A piston shaft drop gauge according to claim 1, characterized in that: The blowing assembly comprises a motor (11), the bottom of the motor (11) is fixedly connected to the top of the base plate (1), the output end of the motor (11) is fixedly connected to a transmission rod (13), the other end of the transmission rod (13) is fixedly connected to an eccentric wheel (12), the top of the base plate (1) is fixedly connected to a support member (8), the inner wall of the support member (8) is slidably connected to a piston member (20), the outer side of the piston member (20) is fixedly connected to a T-shaped rod (10), the outer side of the T-shaped rod (10) is sleeved with a spring (9), and the inner wall of the support member (8) is provided with an air outlet groove (23).

3. The piston shaft drop gauge according to claim 1, characterized in that: The top of the bottom plate (1) is fixedly connected to a limit seat (14), the top of the limit seat (14) is slidably connected to a calibration piece (15), and the top of the calibration piece (15) is slidably connected to the bottom of the measuring rod (5).

4. The piston shaft drop gauge according to claim 1, characterized in that: One end of the fixing member (16) is slidably connected to the outside of the rubber layer (18), and the other end of the fixing member (16) is fixedly connected to an irregular protrusion.

5. The piston shaft drop gauge according to claim 1, characterized in that: Shock-absorbing feet (24) are provided at the four corners of the bottom of the base plate (1), and two pull rods are fixedly connected to the top of the base plate (1).

6. The piston shaft drop gauge according to claim 2, characterized in that: One end of the spring (9) is fixedly connected to the outer side of the support member (8), and the other end of the spring (9) is fixedly connected to the inner side of the T-shaped rod (10).

7. The piston shaft drop gauge according to claim 2, characterized in that: A first one-way valve (21) is fixedly connected to the outer side of the piston member (20), and a second one-way valve (22) is fixedly connected to the inner wall of the support member (8).

8. The piston shaft drop gauge according to claim 2, characterized in that: Two air inlet grooves are provided on the outside of the support member (8).

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