Automatic detection device for hydraulic cylinder

Abstract

The invention belongs to the field of hydraulic cylinder application, and provides a hydraulic cylinder automatic detection device which comprises a detection equipment support, a placement base is fixedly installed at the bottom of the detection equipment support, a placement groove is formed in the middle of the top end of the placement base, a hydraulic cylinder barrel is placed in the placement groove, and a piston rod is movably arranged at the top end of the hydraulic cylinder barrel. A supporting part is arranged on the top of the detection equipment support and located above the hydraulic cylinder barrel, a pressure detector is installed in the middle of the top end of the supporting part, the bottom end of the pressure detector extends into the supporting part to be provided with a pressure sensor, and a controller is installed in the middle of the outer surface of the detection equipment support. The limiting and fixing mechanism is matched with hydraulic cylinder barrels of different sizes through cooperation of a movable supporting plate, a sliding block and a positioning clamping block, and fixing in the horizontal direction and the vertical direction is achieved; an inclined supporting rod and a threaded supporting rod of the supporting mechanism can adjust the supporting height and angle, the top of the hydraulic cylinder barrel is further stabilized, the problem of deviation during detection is solved, and accurate pressure transmission is guaranteed.

Description

Technical Field

[0001] The invention belongs to the application field of hydraulic cylinders, in particular to an automatic detection device for hydraulic cylinders. Background Art

[0002] Hydraulic cylinders are actuators that convert hydraulic energy into mechanical energy. They achieve linear or oscillating output through the reciprocating motion of a piston within a cylinder barrel. They are widely used in engineering machinery, metallurgy, machine tools, and other fields. Depending on their structure and operating mode, they can be divided into single-acting and double-acting hydraulic cylinders. Their performance parameters directly affect the stability and safety of equipment operation.

[0003] The hydraulic cylinder automatic detection device is a special equipment that integrates mechanical structure, sensing technology and automatic control. It is used to automatically test the key performance of hydraulic cylinders (especially bearing pressure). Its core function is to simulate the actual working conditions of the hydraulic cylinder. It collects data through pressure sensors, displacement sensors, etc., and after analysis and processing by the controller, it can quickly determine whether the hydraulic cylinder meets the design standards. It can greatly reduce manual operations and improve detection efficiency and consistency. It is an important equipment in the production and quality inspection of hydraulic cylinders.

[0004] When the existing hydraulic cylinder automatic detection device performs load-bearing pressure detection on the hydraulic cylinder (especially the single-acting hydraulic cylinder), the telescopic rod of the hydraulic cylinder needs to contact the pressure sensor of the detection equipment to transmit pressure. However, due to the differences in the end shapes of different types of hydraulic cylinders (such as flat ends, spherical ends, special-shaped ends with connecting ears, etc.), the contact surface with the pressure sensor is often unable to fit stably; this unstable contact will cause the pressure transmission direction to shift. As the hydraulic cylinder continues to apply pressure, the telescopic rod is prone to tilt, which in turn causes the overall position of the hydraulic cylinder to shift, which not only affects the accuracy of the data collected by the pressure sensor, but may also cause vibration of the detection equipment, component wear and other problems due to uneven force. In order to correct the deviation, the operator needs to frequently stop the machine to adjust the position of the hydraulic cylinder, which seriously reduces the detection efficiency and makes it difficult to meet the quality inspection needs of large-scale production. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an automatic detection device for a hydraulic cylinder to solve the problem in the prior art that the hydraulic cylinder has position offset during detection.

[0006] A hydraulic cylinder automatic detection device comprises a detection equipment bracket, a placement base is fixedly installed at the bottom of the detection equipment bracket, a placement groove is opened in the middle of the top of the placement base, a hydraulic cylinder is placed inside the placement groove, a piston rod is movably provided at the top of the hydraulic cylinder, a support portion is provided at the top of the detection equipment bracket above the hydraulic cylinder, a pressure detector is installed in the middle of the top of the support portion, a pressure sensor is provided at the bottom end of the pressure detector extending to the inside of the support portion, a controller is installed at the middle of the outer surface of the detection equipment bracket, and a limited fixing mechanism is provided inside the placement groove for fixing the hydraulic cylinder in the placement base;

[0007] The fixing mechanism includes a plurality of guide slots, the guide slots being equidistantly arranged at the bottom end of the inner wall of the placement slot, the bottom end of the guide slot extending to the bottom of the placement base and provided with a fixed inner slot, a movable support plate being rotatably installed inside the fixed inner slot, a plurality of arc-shaped guide slots being provided on the upper surface of the movable support plate, the guide slots and the arc-shaped guide slots being aligned with each other, a No. 1 slider being movably installed inside the guide slot, a No. 2 slider being welded to the bottom end of the No. 1 slider extending to the inside of the arc-shaped guide slot, and a positioning clamp being fixedly installed on the upper surface of the No. 1 slider;

[0008] The upper surface of the positioning clamp is also provided with a supporting mechanism for stably supporting the top of hydraulic cylinders of different sizes;

[0009] The outside of the placement base is also provided with a control part for controlling the limit fixation of the movable support plate during rotation;

[0010] A stable supporting structure is provided at the bottom of the supporting portion for stably positioning the tops of different types of piston rods.

[0011] Preferably, the support mechanism includes a fixed support plate, which is fixedly mounted on the edge of the upper surface of the positioning clamp and extends to the outside of the placement slot. A bearing support is provided on the top edge of the fixed support plate, and an oblique support rod is rotatably mounted inside the bearing support. The top of the oblique support rod is threadedly connected to a threaded support rod, and a fixed ball is fixedly mounted on the top of the threaded support rod.

[0012] Preferably, the control part includes an electric telescopic rod, which is arranged on the outer surface of the placement base, and a fixed hanging ring is fixedly connected to the output end of one side of the electric telescopic rod, and a wide-mouth groove is opened on one side of the inner wall of the fixed inner groove near the electric telescopic rod, and an external connecting rod is fixedly connected to one side of the outer surface of the movable support plate extending to the outside of the wide-mouth groove, and the fixed hanging ring is erected on the upper surface of the external connecting rod.

[0013] Preferably, the stable support structure comprises a mounting groove, which is arranged in the middle of the bottom end of the support part, a limiting support frame is movably arranged in the mounting groove, the upper surface of the limiting support frame abuts the pressure sensor, a fixed inner cavity is arranged in the inner top of the limiting support frame, a plurality of supporting balls are arranged in the fixed inner cavity, a plurality of fixed holes are arranged in the bottom end of the limiting support frame and extend into the fixed inner cavity, and a positioning pressure rod is movably arranged in the fixed holes.

[0014] Preferably, a threaded hole is arranged in the bottom hinge point of the inclined support rod, a through hole is arranged in the top of the bearing support and is aligned with the threaded hole, and a fastening bolt is threadedly connected to the front and rear ends of the inclined support rod and passes through the bearing support.

[0015] Preferably, a semicircular groove is arranged at the bottom of one end of the fixed hanging ring, the outer diameter of the outer connecting rod is smaller than the inner diameter of the semicircular groove, and a lug is integrally formed on one side of the outer connecting rod.

[0016] Preferably, the inner diameter of the middle position of the fixed hole is larger than the inner diameters of the upper and lower opening positions, a fixed baffle is fixedly connected to the middle position of the outer surface of the positioning pressure rod, a tension spring is arranged on the outer surface of the positioning pressure rod and above the fixed baffle, and the tension spring is arranged at the middle position of the fixed hole.

[0017] Preferably, the outer diameter of the positioning pressure rod is smaller than the inner diameters of the upper and lower opening positions of the fixed hole, the upper and lower ends of the positioning pressure rod extend to the outside of the fixed hole, and the fixed hole and the positioning pressure rod are embedded with each other.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. The limiting and fixing mechanism cooperates with the movable support plate, the sliding block and the positioning clamp block to adapt to different sizes of the hydraulic cylinder barrel, realizes horizontal and vertical fixation, the inclined support rod and the threaded support rod of the supporting mechanism can adjust the support height and angle, further stabilize the top of the hydraulic cylinder barrel, solve the deviation problem during detection, and ensure the accuracy of pressure transmission.

[0020] 2. The control part cooperates with the electric telescopic rod, the fixed hanging ring and the outer connecting rod to automatically control the limiting of the movable support plate and replace manual operation; the stable support structure adapts to different piston rod end shapes by using the supporting balls and the positioning pressure rod, automatically adjusts the contact stability, and improves the detection efficiency and the degree of automation.

[0021] 3、The present application through the design of guide chute, arc-shaped guide groove, the positioning clamp block can be adapted to different cylinder diameter hydraulic cylinder barrel;The adjustable structure of threaded support rod, positioning pressure rod, compatible with various end shape piston rod, meet the detection demand of multiple model hydraulic cylinder, enhance the versatility of equipment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the overall structure schematic diagram of the present application;

[0023] Figure 2 It is the structure schematic diagram of the placing base in the present application;

[0024] Figure 3 It is the structure schematic diagram of the positioning clamp block in the present application;

[0025] Figure 4 It is the structure schematic diagram of the movable support plate in the present application;

[0026] Figure 5 It is the structure schematic diagram of the positioning pressure rod in the present application;

[0027] Figure 6 It is the internal structure schematic diagram of the support part in the present application;

[0028] Figure 7 It is the cross-sectional structure schematic diagram of the limiting support frame in the present application;

[0029] Figure 8 It is the structure schematic diagram of the inclined support rod in the present application.

[0030] In the figure:

[0031] 1, detection equipment support;2, placing base;3, placing groove;4, hydraulic cylinder barrel;5, piston rod;6, support part;7, pressure detector;8, pressure sensor;9, guide chute;10, fixed inner groove;11, movable support plate;12, arc-shaped guide groove;13, No. 1 sliding block;14, No. 2 sliding block;15, positioning clamp block;16, fixed support plate;17, bearing support;18, inclined support rod;19, threaded support rod;20, fixed ball;21, fastening bolt;22, outer connecting rod;23, electric telescopic rod;24, fixed hanging ring;25, installation groove;26, limiting support frame;27, fixed inner cavity;28, support ball;29, fixed hole;30, positioning pressure rod;31, fixed baffle;32, tension spring;33, controller. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0033] As attached Figure 1 to the attachedFigure 8 as shown:

[0034] Embodiment one: the present application provides a kind of hydraulic cylinder automatic detection device, including detection equipment support 1, detection equipment support 1 bottom fixed mounting has placing base 2, placing base 2 top middle part is equipped with placing groove 3, placing groove 3 inside is placed with hydraulic cylinder barrel 4, hydraulic cylinder barrel 4 top is movably provided with piston rod 5, detection equipment support 1 top is located above hydraulic cylinder barrel 4 and is provided with support portion 6, support portion 6 top middle part is installed with pressure detector 7, pressure detector 7 bottom end extends to the pressure sensor 8 in the inside of support portion 6, detection equipment support 1 outer surface middle part is installed with controller 33, placing groove 3 is equipped with limit fixed mechanism inside, for fixing hydraulic cylinder barrel 4 in placing base 2;

[0035] Fixed mechanism includes several guide sliding slot 9, guide sliding slot 9 equidistantly is equipped in placing groove 3 inner wall bottom, guide sliding slot 9 bottom extends to the fixed inner groove 10 in the bottom of placing base 2, fixed inner groove 10 is rotatably installed with movable supporting plate 11 inside, movable supporting plate 11 upper surface is equipped with several arc-shaped guide slot 12, guide sliding slot 9 and arc-shaped guide slot 12 are aligned with each other, guide sliding slot 9 is movably installed with one sliding block 13 inside, one sliding block 13 bottom end extends to the welding of two sliding blocks 14 in the inside of arc-shaped guide slot 12, one sliding block 13 upper surface is fixedly installed with positioning clamping block 15;

[0036] Positioning clamping block 15 upper surface is also provided with support mechanism, for the stable support of the top of different size hydraulic cylinder barrel 4;

[0037] Placing base 2 outside is also equipped with control part, for controlling movable supporting plate 11 limit fixed in rotation;

[0038] Support portion 6 bottom is provided with stable support structure, for the stable positioning of the top of different types of piston rod 5.

[0039] From the above, in use, staff first adjusts limit fixed mechanism according to the size of hydraulic cylinder barrel 4: the hydraulic cylinder barrel 4 is placed into placing groove 3, and the output end of the electric telescopic rod 23 is pushed to move the fixed hanging ring 24, the fixed hanging ring 24 is connected with the outer connecting rod 22 through the lug ear clamping, drives movable supporting plate 11 to rotate in fixed inner groove 10 (arc-shaped guide slot 12 and guide sliding slot 9 guide two sliding blocks 14, one sliding block 13 synchronous sliding), make positioning clamping block 15 shrink to hydraulic cylinder barrel 4, until clamping hydraulic cylinder barrel 4 outer wall (the arc surface of positioning clamping block 15 is adapted to hydraulic cylinder barrel 4, realizes preliminary fixed).

[0040] Reference Figure 2 And Figure 3The supporting mechanism comprises a fixed supporting plate 16 fixedly installed on the upper surface of the positioning clamping block 15 and extending to the outside of the placing groove 3, a bearing support 17 provided at the top end of the fixed supporting plate 16, and an inclined supporting rod 18 rotatably installed in the bearing support 17, wherein a threaded supporting rod 19 is threadedly connected to the top end of the inclined supporting rod 18, and a fixed ball 20 is fixedly installed at the top end of the threaded supporting rod 19.

[0041] A threaded hole is formed through the hinge joint point at the bottom of the inclined supporting rod 18, and a through hole is formed through the top of the bearing support 17 and aligned with the threaded hole, and the front and rear ends of the inclined supporting rod 18 are threadedly connected with fastening bolts 21 penetrating through the bearing support 17.

[0042] As can be seen from the above, the inclined supporting rod 18 is rotated to rotate around the bearing support 17 to an appropriate angle, and the fastening bolts 21 are tightened to fix the position of the inclined supporting rod 18; the threaded supporting rod 19 is rotated to adjust the height of the fixed ball 20, so that the fixed ball 20 abuts against the top edge of the hydraulic cylinder barrel 4 (the fixed ball 20 can be adapted to the top of the hydraulic cylinder barrel 4 of different shapes to provide stable support and prevent the hydraulic cylinder barrel 4 from toppling over).

[0043] Embodiment two:

[0044] With reference to Figure 3 and Figure 4 The control part comprises an electric telescopic rod 23 arranged on the outer surface of the placing base 2, a fixed hanging ring 24 fixedly connected to the output end of one side of the electric telescopic rod 23, a wide-mouth groove formed in the inner wall of the fixed inner groove 10 near the electric telescopic rod 23, an outer connecting rod 22 fixedly connected to the outer surface of the movable supporting plate 11 and extending to the outside of the wide-mouth groove, and the fixed hanging ring 24 arranged on the upper surface of the outer connecting rod 22.

[0045] One end of the fixed hanging ring 24 is provided with a semicircular groove, the outer diameter of the outer connecting rod 22 is smaller than the inner diameter of the semicircular groove, and the outer connecting rod 22 is further integrally formed with an ear on one side of the outer diameter.

[0046] As can be seen from the above, after the hydraulic cylinder barrel 4 is fixed, the staff member operates the stable supporting structure to adapt to the piston rod 5, the top end of the piston rod 5 abuts against the bottom end of the limiting supporting frame 26, the positioning pressing rod 30 is pressed upward by the piston rod 5, and the fixed baffle 31 compresses the extension spring 32; the supporting ball 28 rolls in the fixed inner cavity 27 and is self-adaptable to the shape of the top end of the piston rod 5 (if the top end of the piston rod 5 is spherical, the supporting ball 28 can disperse the pressure, the positioning pressing rod 30 is tightly attached to the surface of the piston rod 5 through the rebound force of the extension spring 32, and the contact is stable).

[0047] At this time, the pressure sensor 8 abuts against the top end of the limiting support frame 26, the pressure detector 7 collects pressure data in real time through the wire, and the controller 33 can set detection parameters (such as pressure threshold, detection time) to prepare for subsequent pressure detection.

[0048] Embodiment three:

[0049] Referring to the accompanying Figure 5 to the accompanying Figure 7 , the stable support structure includes a mounting groove 25, which is arranged in the middle of the bottom end of the support part 6. A limiting support frame 26 is movably arranged inside the mounting groove 25. The upper surface of the limiting support frame 26 abuts against the pressure sensor 8. A fixed inner cavity 27 is arranged in the inner top of the limiting support frame 26. A plurality of support balls 28 are placed inside the fixed inner cavity 27. A plurality of fixed holes 29 are arranged through the bottom end of the limiting support frame 26 and extend into the fixed inner cavity 27. A positioning pressure rod 30 is movably arranged inside the fixed holes 29.

[0050] The inner diameter of the fixed hole 29 at the middle position is greater than the inner diameter of the opening at the upper and lower ends. A fixed baffle 31 is fixedly connected to one side of the outer surface of the positioning pressure rod 30 at the middle position of the fixed hole 29. A tension spring 32 is sleeved on the outer surface of the positioning pressure rod 30 above the fixed baffle 31. The tension spring 32 is located at the middle position of the fixed hole 29.

[0051] The outer diameter of the positioning pressure rod 30 is smaller than the inner diameter of the opening at the upper and lower ends of the fixed hole 29. The upper and lower ends of the positioning pressure rod 30 extend to the outside of the fixed hole 29. The fixed hole 29 and the positioning pressure rod 30 are embedded in each other.

[0052] As can be seen from the above, the hydraulic cylinder barrel 4 is started, and the piston rod 5 is stretched upwards. The pressure is transmitted to the pressure sensor 8 through the limiting support frame 26. The pressure detector 7 records the real-time pressure value and displays it on the screen of the controller 33. If the top end of the piston rod 5 deviates, the support ball 28 can fine-tune the posture of the limiting support frame 26. The positioning pressure rod 30 cooperates with the tension spring 32 to continuously adhere to the piston rod 5, ensuring the stability of the pressure transmission direction during the detection process. The movable support plate 11, the positioning clamp block 15, and the inclined support rod 18 jointly act to prevent the hydraulic cylinder barrel 4 from deviating and ensure the accuracy of the detection data.

[0053] After the detection is completed, the controller 33 automatically judges whether the pressure data meets the standard and generates a detection report. If it is necessary to adjust the detection parameters or replace the hydraulic cylinder model, reverse operation of the mechanisms such as the electric telescopic rod 23 and the threaded support rod 19 can quickly complete the equipment adaptation.

[0054] Working principle: through the limiting fixing mechanism, the movable support plate 11 is rotated, the first sliding block 13 and the second sliding block 14 are guided to slide through the guide sliding groove 9 and the arc-shaped guide groove 12, the positioning clamp block 15 is driven to clamp the hydraulic cylinder barrel 4, and different cylinder diameters are adapted; the angle is adjusted by rotating the inclined support rod 18 around the bearing support 17, the height is adjusted by rotating the threaded support rod 19, the fixed ball 20 is stable on the top of the hydraulic cylinder barrel 4, the fastening bolt 21 is locked to the position of the inclined support rod 18; the electric telescopic rod 23 pushes the fixed hanging ring 24, and the outer connecting rod 22 is clamped, the movable support plate 11 is automatically limited, manual operation is replaced, and the hydraulic cylinder barrel 4 is quickly and accurately fixed;

[0055] The supporting ball 28 is self-adaptive to the shape of the end of the piston rod 5 in the fixed inner cavity 27, the positioning pressure rod 30 is extruded by the piston rod 5, the fixed baffle 31 compresses the tension spring 32, continuously adheres to the piston rod 5, and guarantees that pressure is stably transmitted to the pressure sensor 8; the limiting support frame 26 is embedded in the mounting groove 25, the pressure sensor 8 is connected with the piston rod 5, and the continuity and accuracy of pressure detection are ensured;

[0056] The pressure detector 7 collects the data of the pressure sensor 8 in real time, transmits the data to the controller 33 for automatic analysis and judgment, generates a detection report, the adjustable and adaptable structures of multiple mechanisms such as the positioning clamp block 15, the threaded support rod 19 and the positioning pressure rod 30 meet the detection requirements of different models of the hydraulic cylinder barrel 4, and high-efficiency quality inspection under large-scale production is achieved.

[0057] Embodiments of the present application are given for example and description, although embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above-mentioned embodiments within the scope of the present application.

Claims

1. A hydraulic cylinder automatic detection device, comprising a detection equipment bracket (1), a placement base (2) fixedly mounted on the bottom of the detection equipment bracket (1), a placement groove (3) provided in the middle of the top of the placement base (2), a hydraulic cylinder barrel (4) placed inside the placement groove (3), and a piston rod (5) movably provided on the top of the hydraulic cylinder barrel (4), characterized in that: The top of the detection device bracket (1) is located above the hydraulic cylinder (4) and is provided with a support portion (6); a pressure detector (7) is installed in the middle of the top of the support portion (6); the bottom of the pressure detector (7) extends to the inside of the support portion (6) and is provided with a pressure sensor (8); a controller (33) is installed in the middle of the outer surface of the detection device bracket (1); a limited position fixing mechanism is provided inside the placement groove (3) for fixing the hydraulic cylinder (4) in the placement base (2); The fixing mechanism includes a plurality of guide slots (9), the guide slots (9) are equidistantly arranged at the bottom end of the inner wall of the placement slot (3), the bottom end of the guide slot (9) extends to the bottom of the placement base (2) and is provided with a fixed inner slot (10), a movable support plate (11) is rotatably installed inside the fixed inner slot (10), a plurality of arc-shaped guide slots (12) are provided on the upper surface of the movable support plate (11), the guide slots (9) and the arc-shaped guide slots (12) are aligned with each other, a No. 1 slider (13) is movably installed inside the guide slot (9), a No. 2 slider (14) is welded to the bottom end of the No. 1 slider (13) extending to the inside of the arc-shaped guide slot (12), and a positioning clamp (15) is fixedly installed on the upper surface of the No. 1 slider (13); The upper surface of the positioning clamp (15) is also provided with a supporting mechanism for stably supporting the tops of hydraulic cylinders (4) of different sizes; The placement base (2) is also provided with a control unit on the outside thereof for controlling the position limiting and fixing of the movable support plate (11) during rotation; The bottom of the support portion (6) is provided with a stable support structure for stably positioning the tops of different types of piston rods (5).

2. The automatic detection device for a hydraulic cylinder according to claim 1, characterized in that: The supporting mechanism comprises a fixed support plate (16), the fixed support plate (16) being fixedly mounted on the edge of the upper surface of the positioning clamp (15) and extending to the outside of the placement groove (3), a bearing support (17) being provided at the top edge of the fixed support plate (16), an oblique support rod (18) being rotatably mounted inside the bearing support (17), a threaded support rod (19) being threadedly connected to the top of the oblique support rod (18), and a fixed ball (20) being fixedly mounted at the top of the threaded support rod (19).

3. The automatic detection device for a hydraulic cylinder according to claim 1, characterized in that: The control unit includes an electric telescopic rod (23), the electric telescopic rod (23) is arranged on the outer surface of the placement base (2), a fixed hanging ring (24) is fixedly connected to the output end of one side of the electric telescopic rod (23), a wide-mouth groove is opened on one side of the inner wall of the fixed inner groove (10) near the electric telescopic rod (23), and an outer connecting rod (22) is fixedly connected to one side of the outer surface of the movable support plate (11) extending to the outside of the wide-mouth groove, and the fixed hanging ring (24) is mounted on the upper surface of the outer connecting rod (22).

4. The automatic detection device for a hydraulic cylinder according to claim 1, characterized in that: The stable support structure includes a mounting groove (25), the mounting groove (25) is opened at the middle of the bottom end of the support part (6), a limit support frame (26) is movably arranged inside the mounting groove (25), the upper surface of the limit support frame (26) is in contact with the pressure sensor (8), a fixed inner cavity (27) is opened at the top of the limit support frame (26), a plurality of support balls (28) are placed inside the fixed inner cavity (27), the bottom end of the limit support frame (26) extends to the inside of the fixed inner cavity (27) and is provided with a plurality of fixing holes (29), and a positioning pressure rod (30) is movably installed inside the fixing hole (29).

5. The automatic detection device for a hydraulic cylinder according to claim 2, characterized in that: A threaded hole is provided at the bottom hinge point of the diagonal support rod (18), a through hole is provided at the top of the bearing support (17) and the threaded holes are aligned with each other, and the front and rear ends of the diagonal support rod (18) are threadedly connected with fastening bolts (21) passing through the bearing support (17), and the fastening bolts (21) and the through holes are interlocked.

6. The automatic detection device for a hydraulic cylinder according to claim 3, characterized in that: A semicircular groove is provided at the bottom of one end of the fixed hanging ring (24); the outer diameter of the outer connecting rod (22) is smaller than the inner diameter of the semicircular groove; a raised ear is integrally formed on one side edge of the outer connecting rod (22); the fixed hanging ring (24) is clamped at the raised ear on the outer surface of the outer connecting rod (22).

7. The automatic detection device for a hydraulic cylinder according to claim 4, characterized in that: The inner diameter of the middle position of the fixing hole (29) is larger than the inner diameters of the openings at the upper and lower ends; one side of the outer surface of the positioning pressure rod (30) is fixedly connected to a fixed baffle (31) at the middle position of the fixing hole (29); the outer surface of the positioning pressure rod (30) is placed above the fixed baffle (31) and is sleeved with a tension spring (32); the tension spring (32) is located at the middle position of the fixing hole (29).

8. The automatic detection device for a hydraulic cylinder according to claim 4, characterized in that: The outer diameter of the positioning rod (30) is smaller than the inner diameter of the upper and lower openings of the fixing hole (29). The upper and lower ends of the positioning rod (30) extend to the outside of the fixing hole (29). The fixing hole (29) and the positioning rod (30) are interlocked.

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