Hydraulic piston rod surface scratch detection device and detection method

Abstract

The present invention provides a device for detecting scratches on the surface of a hydraulic piston rod, which is provided with a clamping part; a plurality of detection mechanisms, a reset mechanism and a reminder mechanism are provided in the clamping part; the detection mechanism comprises a bracket and a lever; the lever is rotatably connected to the bracket; a detection needle is provided at one end of the lever, and a contact switch is provided at the other end, and the distance from the contact switch to the bracket is greater than the distance from the detection needle to the bracket; a method for detecting scratches on the surface of a hydraulic piston rod comprises the following steps: S1 installation; S2 adjustment; S4 detection; S5 re-inspection; the beneficial effects of the present invention are: by utilizing the lever principle, the detection needle liquid is amplified when the scratches on the surface of the pressure piston rod are detected to reach a certain depth, and the contact switch is used to judge whether the repair standard is reached, and the reminder mechanism controlled by the contact switch is used to indicate it for easy identification.

Description

Technical Field

[0001] The invention relates to the technical field of forklift remanufacturing, and in particular to a hydraulic piston rod surface scratch detection device and a detection method. Background Art

[0002] The surface of the hydraulic piston rod is generally plated with a layer of chrome. The thickness of the chrome plating is generally 0.03-0.05mm, and reaches 0.08mm when the anti-corrosion requirements are high. If the chrome plating is too thin, the hardness is insufficient and the anti-corrosion performance is poor. If it is too thick, the chrome plating is easily fallen off due to bumps, affecting the normal use of the hydraulic cylinder piston rod.

[0003] During the use of hydraulic piston rods, sometimes they will be pulled, scratched or hit. If they are not handled in time, it will affect the normal use at the least, such as causing seal failure, oil leakage in the hydraulic cylinder, etc., and even cause the hydraulic cylinder to fail to work.

[0004] When the hydraulic piston rod is strained, scratched or hit, most of the inspections are currently done manually with the naked eye. The inspection results are very unstable and it is easy for the situation to be missed, resulting in the continued use of the scratched hydraulic piston rod.

[0005] Especially when the hydraulic piston rod has scratches only on the chrome plating layer, when the scratches on the chrome plating layer exceed 0.02, it will affect the use, but it is difficult to observe with the naked eye and there is currently no good solution. Summary of the invention

[0006] Aiming at the deficiencies of the prior art, the present invention provides a hydraulic piston rod surface scratch detection device and a detection method.

[0007] The present invention solves the above technical problems through the following technical means:

[0008] A hydraulic piston rod surface scratch detection device is provided with a clamping part; a plurality of detection mechanisms, a reset mechanism and a reminder mechanism are arranged in the clamping part; the detection mechanism includes a bracket and a lever; the lever is rotatably connected to the bracket; a detection needle is arranged at one end of the lever, and a contact switch is arranged at the other end, and the distance from the contact switch to the bracket is greater than the distance from the detection needle to the bracket.

[0009] As an improvement of the above technical solution, the contact switch includes a contact element and a contact groove installed on a lever, and the contact groove is installed on a clamping portion for use with the contact element; the contact element and the contact groove are respectively connected to the positive and negative poles of a power supply; and the contact switches on each detection mechanism are arranged to be connected in parallel.

[0010] As an improvement of the above technical solution, the hydraulic piston rod surface scratch detection device includes a power supply, a reminder mechanism and a plurality of contact switches; the plurality of contact switches are arranged in parallel and then connected in series with the reminder mechanism and the power supply.

[0011] As an improvement of the above technical solution, the hydraulic piston rod surface scratch detection device includes a power supply, a plurality of reminder mechanisms and contact switches equal to the number of reminder mechanisms; each contact switch controls a reminder mechanism, and the combination of the plurality of contact switches and the reminder mechanisms is arranged in parallel.

[0012] As an improvement of the above technical solution, the clamping portion is provided with two semicircular movable portions, one end of the two movable portions is rotatably connected by a hinge, and the other end is provided with a detachable connection.

[0013] As an improvement of the above technical solution, an elastic pad is provided inside the clamping portion.

[0014] A method for detecting scratches on the surface of a hydraulic piston rod comprises the following steps:

[0015] S1 Installation

[0016] Install the detection device on the hydraulic cylinder and adjust the position of the hydraulic piston rod so that the detection needle touches the unworn surface of the hydraulic piston rod;

[0017] S2 regulation

[0018] The distance between the contact element and the contact groove 242 in the contact switch is adjusted according to the depth of the scratch to be detected;

[0019] S4 detection

[0020] Operate the hydraulic piston rod to extend it, and the detection needle slides on its surface; when the reminder mechanism works, the hydraulic piston rod stops moving, and mark the hydraulic piston rod at that place, and repair it later;

[0021] S5 Re-examination

[0022] Operate the hydraulic piston rod to shorten it and let the detection needle slide on its surface; when the reminder mechanism works, the hydraulic piston rod stops moving, mark the hydraulic piston rod at that place and repair it later.

[0023] The beneficial effects of the present invention are as follows: by utilizing the lever principle, the detection needle liquid is amplified when detecting that the scratch on the surface of the pressure piston rod reaches a certain depth, and the contact switch is used to determine whether the repair standard is reached, and the reminder mechanism controlled by the contact switch is used to indicate it for easy identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a structural schematic diagram of a hydraulic piston rod surface scratch detection device according to an embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a scratch detection device on the surface of a hydraulic piston rod when a scratch is detected;

[0026] Figure 3 It is a left side view of the hydraulic piston rod surface scratch detection device according to an embodiment of the present invention;

[0027] Figure 4 It is a right side view of the hydraulic piston rod surface scratch detection device according to Embodiment 1 of the present invention;

[0028] Figure 5 It is a right side view of the hydraulic piston rod surface scratch detection device according to Embodiment 2 of the present invention;

[0029] Figure 6 This is a circuit diagram of the reminder mechanism in Example 1 of the present invention;

[0030] Figure 7 This is a circuit diagram of the reminder mechanism in Embodiment 2 of the present invention;

[0031] Hydraulic piston rod A, hydraulic cylinder B, clamping part 10, movable part 11, front opening 12, rear opening 13, bracket 21, lever 22, detection needle 23, contact switch 24, contact element 241, contact groove 242, reset mechanism 30, reminder mechanism 40. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0034] Example

[0035] like Figure 1 , Figure 3As shown, the hydraulic piston rod surface scratch detection device described in this embodiment includes: a clamping portion 10; a plurality of detection mechanisms, a reset mechanism 30 and a reminder mechanism 40 are arranged in the clamping portion 10; the clamping portion 10 is provided with a plurality of front openings 12 on one side close to the hydraulic piston rod A, and a plurality of rear openings 13 on the other side; the number of the detection mechanisms, the front openings 12 and the rear openings 13 is equal.

[0036] The detection mechanism includes a bracket 21 and a lever 22; the lever 22 is rotatably connected to the bracket 21; a detection needle 23 is provided at one end of the lever 22, and a contact switch 24 is provided at the other end, the distance from the contact switch 24 to the bracket 21 is a, the distance from the detection needle 23 to the bracket 21 is b, and a is greater than b.

[0037] One end of the lever 22 moves in the front opening 12 , and the other end moves in the rear opening 13 , so as to prevent the lever 22 from shaking left and right.

[0038] The contact switch 24 includes a contact element 241 installed on a lever and a contact groove 242 installed in the rear opening 13 for use with the contact element 241; the contact element 241, the contact groove 242 and the center of the hydraulic cylinder B are set on a straight line, and the contact groove 242 slides and adjusts along the straight line in the rear opening 13.

[0039] The contact groove 242 can be slidably adjusted to calibrate the detection device, making the detection result more accurate, and also enabling the detection device to detect scratches of different depths.

[0040] The contact element 241 and the contact groove 242 are respectively connected to the positive and negative electrodes of a power source (not shown in the figure); the contact switches 24 on each detection mechanism are arranged to be connected in parallel.

[0041] Closing any one of the contact switches 24 can energize the reminder mechanism 40 for operation.

[0042] The ratio of the distance between the contact element 241 and the contact groove 242 in the contact switch 24 to the depth of the scratch to be detected is equal to the ratio of the distance a from the contact switch 24 to the bracket 21 to the distance b from the detection needle 23 to the bracket 21; the larger the ratio, the higher the detection accuracy.

[0043] The contact element 241 can be made of a conductive metal product in a cylindrical or sheet shape, and the contact groove 242 is configured as a groove shape matching the contact element 241 , thereby increasing the contact area between the contact element 241 and the contact groove 242 .

[0044] like Figure 2As shown, when a scratch appears on the hydraulic piston rod A, the detection needle 23 enters the scratch, and the lever 22 tilts under the action of the reset mechanism 30. If the depth of the scratch exceeds 0.02mm, when a:b=20:1, the contact element 241 will move 0.4mm toward the contact groove 242. Then, when there is no scratch on the hydraulic piston rod A, the distance between the contact element 241 and the contact groove 242 is adjusted to 0.4mm. Then, when a scratch with a depth greater than 0.02mm appears on the hydraulic piston rod A, the contact element 241 contacts the contact groove 242, the circuit is closed, and the reminder mechanism 40 operates; the precision of the detection mechanism can be adjusted by adjusting the size of a:b, and the larger the setting, the higher the precision.

[0045] like Figure 4 As shown, the hydraulic piston rod surface scratch detection device includes a power supply, a reminder mechanism 40 and a plurality of contact switches 24; Figure 6 As shown, the contact switches 24 on several detection mechanisms are arranged in parallel, and then connected in series with the reminder mechanism 40 and the power supply; when each contact switch 24 is closed, the contact switch 24 can be connected in series with the reminder mechanism 40 and the power supply to form a closed circuit.

[0046] The reminder mechanism 40 uses bells, bright lights and other means to serve as a reminder according to different construction site environments. In a quiet environment, a bell can be used for reminder, and an electronic component with model number BTE-2AG3-AND-BUZZER produced by Hangzhou Xiaoshan Botao New Electronic Component Factory in Louta Town is used as an example; in a noisy environment, a bright light can be used for reminder, and an K1 series indicator light produced by Ningbo Haishu Kede Electronic Factory is used as an example.

[0047] The clamping part 10 is provided with two semicircular movable parts 11, one end of the two movable parts 11 is rotatably connected by a hinge, and the other end is set to a detachable connection such as: threaded connection, spline connection, hook connection, etc.; the inner side of the clamping part 10, that is, the side in contact with the hydraulic cylinder B, is provided with an elastic pad; it is convenient for the clamping part 10.

[0048] Example 2

[0049] like Figure 5 As shown, the hydraulic piston rod surface scratch detection device includes a power supply, a plurality of reminder mechanisms 40 and contact switches 24 equal in number to the reminder mechanisms 40; Figure 7 As shown, each contact switch 24 controls a reminder mechanism 40, and a combination of several contact switches 24 and reminder mechanisms 40 is arranged in parallel.

[0050] Example 3

[0051] A method for detecting scratches on the surface of a hydraulic piston rod A comprises the following steps:

[0052] S1 Installation

[0053] Install the detection device on the hydraulic cylinder B, and adjust the position of the hydraulic piston rod A so that the detection needle 23 touches the unworn surface of the hydraulic piston rod A;

[0054] S2 regulation

[0055] The distance between the contact element 241 and the contact groove 242 in the contact switch 24 is adjusted according to the depth of the scratch to be detected;

[0056] S4 detection

[0057] Operate the hydraulic piston rod A to extend it, and the detection needle 23 slides on its surface; wait for the reminder mechanism 40 to work, that is, the hydraulic piston rod A stops moving, and mark the hydraulic piston rod A at that location, and repair it later;

[0058] S5 Re-examination

[0059] Operate the hydraulic piston rod A to shorten it, and the detection needle 23 slides on its surface; when the reminder mechanism 40 works, the hydraulic piston rod A stops moving, and mark the hydraulic piston rod A at that location, and repair it later.

[0060] It should be noted that, in this article, if there are first and second, etc., relational terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The hydraulic piston rod surface scratch detection device is used in conjunction with the hydraulic piston rod. A hydraulic cylinder is set on one side of the hydraulic piston rod. The detection device is installed on the hydraulic cylinder. The characteristics are: A clamping portion (10) is provided, wherein the clamping portion (10) is provided with a plurality of front openings (12) on one side close to the hydraulic piston rod, and a plurality of rear openings (13) on the other side close to the hydraulic cylinder; a plurality of detection mechanisms, a reset mechanism (30) and a reminder mechanism (40) are provided in the clamping portion (10); the detection mechanism comprises a bracket (21) and a lever (22); the lever (22) is rotatably connected to the bracket (21); one end of the lever (22) moves in the front opening (12), and the other end moves in the rear opening (13); one end of the lever (22) is provided with a detection needle (23), and the other end is provided with a contact switch (24); the distance from the contact switch (24) to the bracket (21) is greater than the distance from the detection needle (23) to the bracket (21); The reset mechanism (30) is arranged between the clamping portion (10) and the lever (22); The contact switch (24) comprises a contact element (241) mounted on a lever and a contact groove (242) mounted in the rear opening (13) and used in conjunction with the contact element (241); the contact element (241), the contact groove (242) and the center of the hydraulic cylinder are arranged on a straight line, and the contact groove (242) is slidably adjusted along the straight line in the rear opening (13); The contact element (241) and the contact groove (242) are respectively connected to the positive and negative electrodes of a power source; and the contact switches (24) on each detection mechanism are arranged to be connected in parallel.

2. The hydraulic piston rod surface scratch detection device according to claim 1, characterized in that: The hydraulic piston rod surface scratch detection device comprises a power supply, a reminder mechanism (40) and a plurality of contact switches (24); the plurality of contact switches (24) are connected in parallel and then connected in series with the reminder mechanism (40) and the power supply.

3. The hydraulic piston rod surface scratch detection device according to claim 1, characterized in that: The hydraulic piston rod surface scratch detection device comprises a power supply, a plurality of reminder mechanisms (40), and contact switches (24) equal in number to the reminder mechanisms (40); each contact switch (24) controls a reminder mechanism (40), and a combination of the plurality of contact switches (24) and the reminder mechanisms (40) is arranged in parallel.

4. The hydraulic piston rod surface scratch detection device according to claim 2 or 3, characterized in that: The clamping portion (10) is provided with two semicircular movable portions (11); one end of the two movable portions (11) is rotatably connected via a hinge, and the other end is provided with a detachable connection.

5. The hydraulic piston rod surface scratch detection device according to claim 4, characterized in that: An elastic pad is arranged inside the clamping portion (10).

6. The detection method of the hydraulic piston rod surface scratch detection device according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1 Installation Install the detection device on the hydraulic cylinder and adjust the position of the hydraulic piston rod so that the detection needle (23) lightly touches the unworn surface of the hydraulic piston rod; S2 Regulation Adjusting the distance between the contact element (241) and the contact groove (242) in the contact switch (24) according to the depth of the scratch to be detected; S4 Detection The hydraulic piston rod is operated to extend it, and the detection needle (23) slides on its surface; When the reminder mechanism (40) works, the hydraulic piston rod stops moving, and a mark is made at that position of the hydraulic piston rod so that the position can be repaired later; S5 Re-examination The hydraulic piston rod is operated to shorten it, and the detection needle (23) slides on its surface; When the reminding mechanism (40) works, the hydraulic piston rod stops moving, and a mark is made at the hydraulic piston rod so that the position can be repaired later.

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