A power cylinder test device

Abstract

The present invention relates to the technical field of power cylinder testing, and discloses a power cylinder testing device, comprising a fuel tank, a drive motor, an accumulator, a relief valve, a reversing valve, a fuel cylinder, and a fuel cylinder testing mechanism, wherein the drive motor is installed at the right end of the fuel tank, and is connected to a hydraulic oil pump through the drive motor, an oil filter is installed below the hydraulic oil pump, and a return oil pipe and a pump oil pipe are installed above the hydraulic oil pump, the return oil pipe is connected to the reversing valve upward, the pump oil pipe is connected to the relief valve upward, the relief valve is connected to the accumulator rearward, the side end of the relief valve is connected to a connecting pipe, the connecting pipe is connected to the rear of the reversing valve, the front and rear of the reversing valve are respectively connected to an oil inlet pipe and an oil outlet pipe, the oil outlet pipe and the oil inlet pipe are respectively connected to the front and rear ends of the fuel cylinder, and the fuel cylinder testing mechanism is arranged in front of the fuel cylinder. The present invention flexibly adjusts the detection test to adapt to the detection requirements under different working conditions, and provides a reliable basis for performance evaluation and improvement of the power cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of power cylinder testing, in particular to a power cylinder testing device. Background Art

[0002] The power cylinder test bench is mainly used to conduct comprehensive inspection and testing on the power cylinder of a certain vehicle, including cylinder test, slide valve box test, and power cylinder running-in test. The test bench can meet the needs of pre-repair inspection, repair completion test, fault diagnosis and maintenance assistance of the test piece, effectively improving the comprehensive testing and maintenance capabilities of the power cylinder and ensuring the quality of maintenance.

[0003] Existing power cylinder testing equipment only focuses on testing a single performance feature of the power cylinder. Due to irrational structures or unstable connections, maintenance and upgrades are difficult, increasing operating costs. Testing accuracy is low, and the equipment can only test specific power cylinder models. This lacks versatility and makes it difficult to test the dynamic strength and stability coefficient of the power cylinder's piston rod. This makes it difficult to meet testing requirements under different operating conditions. Therefore, a corresponding technical solution is needed to address this issue. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a power cylinder test device to solve the technical problems thereof.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a power cylinder test device, comprising a fuel tank, a drive motor, an accumulator, a relief valve, a reversing valve, a cylinder and a cylinder test mechanism, the drive motor is installed at the right end of the fuel tank, and the drive motor is connected through a hydraulic oil pump, an oil filter is installed below the hydraulic oil pump, a return oil pipe and a pump oil pipe are respectively installed above the hydraulic oil pump, the return oil pipe is connected to the reversing valve upward, the pump oil pipe is connected to the relief valve upward, the relief valve and the reversing valve are both fixed on the upper end surface of the fuel tank, the relief valve is connected to the accumulator toward the rear, the side end of the relief valve is connected to a connecting pipe, the connecting pipe is connected to the rear of the reversing valve, the front and rear of the reversing valve are respectively connected with an oil inlet pipe and an oil outlet pipe, the oil outlet pipe and the oil inlet pipe are connected and distributed at the front and rear ends of the cylinder, and the cylinder test mechanism is located in front of the cylinder for testing the power of the cylinder.

[0006] Preferably, the front and rear ends of the bottom of the fuel tank are fixedly provided with a base bracket with an I-beam structure, a refueling port is provided on the upper rear part of the fuel tank, an inspection port is installed in the middle of the front part of the fuel tank, an oil thermometer is provided at the front right end of the fuel tank, and an oil drain port is provided at the front left end of the fuel tank; a fixing bracket is fixed to the outside of the accumulator, and the fixing bracket is fixed to the rear end of the fuel tank; the base bracket with an I-beam structure is used to firmly support the fuel tank as a whole, has high structural strength, is sturdy and durable, the refueling port is used to add oil to the inside of the fuel tank, the oil drain port is used to drain oil, the inspection port is used for disassembly and maintenance, the oil thermometer is used to detect the oil temperature inside the fuel tank, and the fixing bracket is used to stably support the accumulator toward the rear end of the fuel tank.

[0007] Preferably, the oil cylinder is a double group and is provided with a top plate at the bottom. The external clamping connection of the oil cylinder is distributed with a clamping ring. The two ends of the clamping ring are connected to the upper end of the top plate by bolts. The top plate is installed on the left end of the oil tank by bolts. A liner plate 1 is installed between the bottom outer end of the top plate and the oil tank; the output end of the oil cylinder is connected to a piston rod, and a positioning ring is fixed to the outer end of the piston rod; the top plate is used to extend toward the left end of the oil tank to support the installation of two groups of oil cylinders, the clamping ring is used to fasten the oil cylinder to the upper end of the top plate, the liner plate 1 is used to strengthen the supporting strength of the top plate, the oil cylinder is used to automatically control the telescopic adjustment of the piston rod, and the positioning ring is used for internal and external adjustment test detection.

[0008] Preferably, the oil cylinder test mechanism includes a test support plate, a test monitoring device, an extension plate 1 and an extension plate 2, the extension plate 1 and the extension plate 2 are symmetrically fixed on the inner lower end of the test support plate, the inner end of the extension plate 1 is installed at the front end of the oil tank, the inner end of the extension plate 2 is fixed with a lining plate 2 with an italic structure, and the inner end of the lining plate 2 is installed at the side end of the oil tank; the test monitoring device is arranged at the outer upper end of the test support plate; the lining plate 2 with an italic structure is used to fix the extension plate 2 to the side end of the oil tank, the extension plate 2 is used to support the test support plate toward the outer end, the extension plate 1 is used to support the test support plate toward the front end of the oil tank, and the test monitoring device is used to display the control power cylinder test process.

[0009] Preferably, a pressure detection plate is provided at the front end of the test support plate, and the front end of the pressure detection plate is connected with an elastic connection structure, and a push plate is fixedly provided at the front end of the elastic connection structure, and grooves are opened and distributed at the front end of the push plate, and the interior of the groove is an arc-shaped structure; the pressure detection plate is used for contact force, and multiple groups of elastic connection structures are used for elastic compression detection pressure, and the groove of the arc-shaped structure is used for accurately clamping the positioning ring to avoid displacement, reduce the detection error rate, better adapt to the piston rod, and improve the accuracy of detection.

[0010] Preferably, a baffle is fixedly provided at the outer end of the groove, a through hole is opened inside the baffle, a spring rod is fixedly provided at the outer end of the through hole, an end plate is fixedly provided at the outer end of the spring rod, a positioning column is fixedly provided at the inner end of the end plate, the positioning column is located inside the spring rod and is connected to the through hole, and a pull rod is fixedly provided at the outer end of the end plate; the through hole is used for movably adjusting the positioning column, the spring rod is used for elastically stretching the end plate and the positioning column, the pull rod is used for hand-held pulling operation, and the positioning column is used to be inserted into the interior of the positioning ring to lock it to prevent shaking and displacement.

[0011] Preferably, a piston rod stability coefficient detection mechanism is provided at the bottom of the extension plate one and the extension plate two, and the piston rod stability coefficient detection mechanism includes a cross plate, the cross plate is fixedly arranged at the bottom of the extension plate one and the extension plate two, and the cross plate is located below the oil cylinder near the front end; a slide groove is provided in the middle of the cross plate, and a sliding plate is slidably connected to the inside of the slide groove, and the upper and lower ends of the sliding plate are fixedly provided with a limit plate, and the limit plate is slidably connected to the upper and lower ends of the cross plate, and the lower end of the limit plate located below is fixed with an electric push rod device, and the upper end of the limit plate located above is fixed with a guide block, the upper end of the electric push rod device passes through the limit plate, the sliding plate and the guide block and is connected to a telescopic rod, and the upper end of the telescopic rod A support block is fixed at the end, a spring coil is fixed above the support block, a support plate is fixed at the upper end of the spring coil, and a recessed structure is formed above the support plate; a piston rod stability coefficient detection mechanism is used to detect the stability coefficient of the piston rod during telescopic movement, and a cross plate is used to support the piston rod stability coefficient detection mechanism to the bottom of extension plate one and extension plate two for lateral adjustment, an electric push rod device is used to lift and lower the telescopic rod, and the telescopic rod is used to support the support block, spring coil and support plate upward, and elastically support the recessed structure of the support plate so as to lift the piston rod and the positioning ring upward, and the spring coil plays a certain buffering role, thereby detecting whether there is oil leakage after the piston rod shaking is adjusted, and whether the telescopic running trajectory of the piston rod is normal.

[0012] Preferably, a bracket is fixed at the rear of the lower end of the limit plate, and the bracket is a right-angled plate structure and has two through holes at the bottom, and two spring rods are fixed below the two through holes, and the lower end of the two spring rods is fixed with two end plates, and the lower end of the two end plates is fixed with two pull rods, and the upper end of the two end plates is fixed with a pin; a socket is provided in the middle of the front end of the horizontal plate, and the pin is connected to the inside of the socket; the bracket with a right-angled plate structure is used to extend the two spring rods toward the lower end of the limit plate, and the two spring rods elastically support the pin and the two end plates, and the pin is located inside the socket and plugged in and locked to avoid movement during the detection process.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) By arranging the piston rod stability coefficient detection mechanism at the bottom of the extension plate 1 and the extension plate 2 and located below the front end of the oil cylinder, the layout fully utilizes the space of the test device, so that the position relationship between the piston rod stability coefficient detection mechanism and the oil cylinder is close, and the piston rod can be detected more directly, avoiding the detection error that may be caused by the distance being too far; and by setting the transverse sliding structure, a stable and flexible movement mode is provided for the piston rod stability coefficient detection mechanism, so that the piston rod stability coefficient detection mechanism can be flexibly adjusted according to the position of the two groups of oil cylinders to meet the detection needs under different working conditions; it is convenient to lift and adjust the height of the support plate so that it can accurately contact and push the piston rod, so as to reciprocate and test the stability and fatigue resistance of the piston rod, more accurately detect whether there is oil leakage under the reciprocating piston movement, and can promptly discover the possible shaking and offset of the piston rod during the movement. The piston rod stability coefficient detection mechanism can more accurately detect the stability coefficient of the piston rod, provide a reliable basis for the performance evaluation and improvement of the power cylinder, and enable it to adapt to the detection needs of power cylinders of different specifications and models, regardless of whether the length, diameter or movement stroke of the piston rod changes;

[0015] (2) The reciprocating pressure detection mechanism, extension plate 1 and extension plate 2 are arranged in front of the test support plate to enhance the stability of the entire test mechanism. The pressure detection plate arranged at the front end of the test support plate and the elastic connection structure connected to the front end thereof enable the pressure detection plate to more accurately detect the pressure change after the piston rod pushes the push plate. The pressure detection plate transmits the detected pressure signal to the test monitoring device, realizing real-time testing of the reciprocating impact pressure or pushing pressure of the piston rod, and can timely obtain the pressure change during the piston rod test, providing important data for the performance analysis of the power cylinder. The detection data can be timely and accurately transmitted to the monitoring device, facilitating real-time monitoring and analysis by the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall front upper right perspective structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall front upper left perspective structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the overall front lower left perspective structure of the present invention;

[0019] Figure 4 This is a schematic diagram of the overall rear lower perspective structure of the present invention;

[0020] Figure 5 Schematic diagram of the internal structure of the fuel tank of the present invention;

[0021] Figure 6This is a schematic structural diagram of the oil cylinder test mechanism of the present invention from an inner upper perspective;

[0022] Figure 7 This is a schematic structural diagram of the oil cylinder test mechanism of the present invention from the outside and bottom perspective;

[0023] Figure 8 This is a schematic structural diagram of the oil cylinder test mechanism of the present invention from an outer side and upper perspective;

[0024] Figure 9 This is a structural schematic diagram of the oil cylinder test mechanism of the present invention from another perspective from the upper outside;

[0025] Figure 10 For the present invention Figure 7 A in the middle is an enlarged structural diagram;

[0026] Figure 11 It is a schematic diagram of the upper structure of the piston rod stability coefficient detection mechanism of the present invention;

[0027] Figure 12 For the present invention Figure 9 Enlarged structural diagram at point B in the middle.

[0028] In the figure: 1, fuel tank; 11, base bracket; 12, oil thermometer; 13, inspection port; 14, oil drain port; 15, refueling port;

[0029] 2. Drive motor; 21. Hydraulic oil pump; 22. Oil filter; 23. Oil return pipe; 24. Pump oil pipe;

[0030] 3. Accumulator; 31. Fixed frame;

[0031] 4. Overflow valve; 41. Connecting pipe;

[0032] 5. Reversing valve; 51. Oil inlet pipe; 52. Oil outlet pipe;

[0033] 6. Oil cylinder; 61. Top plate; 62. Liner plate 1; 63. Snap ring; 64. Piston rod; 65. Positioning ring;

[0034] 7. Cylinder test mechanism; 71. Test support plate; 711. Test monitoring device; 72. Extension plate 1; 73. Extension plate 2; 74. Liner plate 2; 75. Push plate; 750. Groove; 751. Elastic connection structure; 752. Pressure detection plate; 753. Baffle; 7531. Through hole 1; 7532. Spring rod 1; 7533. Positioning column; 7534. End plate 1; 7535. Pull rod 1; 7 6. Horizontal plate; 760. Slide groove; 7601. Socket; 761. Electric push rod device; 7611. Guide block; 762. Telescopic rod; 7621. Support block; 7622. Spring ring; 763. Support plate; 764. Slide plate; 7641. Limit plate; 765. Bracket; 7651. Second through hole; 7652. Second spring rod; 7653. Latch; 7654. Second end plate; 7655. Second pull rod. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0036] See also Figures 1-12 The embodiment of the present invention provides a technical solution: a power cylinder test device, including a fuel tank 1, a drive motor 2, an accumulator 3, a relief valve 4, a reversing valve 5, a fuel cylinder 6 and a fuel cylinder test mechanism 7, the drive motor 2 is installed at the right end of the fuel tank 1, and the drive motor 2 is connected to the hydraulic oil pump 21, an oil filter 22 is installed below the hydraulic oil pump 21, and a return oil pipe 23 and a pump oil pipe 24 are installed above the hydraulic oil pump 21, the return oil pipe 23 is connected to the reversing valve 5 upward, and the pump oil pipe 24 passes through upward and is connected to the overflow valve 4. The overflow valve 4 and the reversing valve 5 are both fixedly arranged on the upper end surface of the oil tank 1. The overflow valve 4 is connected to the accumulator 3 toward the rear. The side end of the overflow valve 4 is connected to the connecting pipe 41. The connecting pipe 41 is connected to the rear of the reversing valve 5. The front and rear of the reversing valve 5 are respectively connected with an oil inlet pipe 51 and an oil outlet pipe 52. The oil outlet pipe 52 and the oil inlet pipe 51 are respectively connected to the front and rear ends of the oil cylinder 6. The oil cylinder test mechanism 7 is arranged in front of the oil cylinder 6 for testing the power of the oil cylinder 6.

[0037] As a further improvement, a base bracket 11 of an I-steel structure is fixedly provided at the front and rear ends of the bottom of the fuel tank 1. A refueling port 15 is provided at the upper rear portion of the fuel tank 1. An inspection port 13 is installed in the middle of the front portion of the fuel tank 1. An oil thermometer 12 is provided at the front right end of the fuel tank 1. An oil drain port 14 is provided at the front left end of the fuel tank 1.

[0038] A fixing bracket 31 is fixed to the outside of the accumulator 3, and the fixing bracket 31 is fixed to the rear end of the oil tank 1;

[0039] The base bracket 11 of the I-beam structure is used to firmly support the entire fuel tank 1. It has high structural strength and is sturdy and durable. The refueling port 15 is used to refuel the inside of the fuel tank 1, the oil drain port 14 is used to drain the oil, the inspection port 13 is used for disassembly and maintenance, the oil thermometer 12 is used to detect the oil temperature inside the fuel tank 1, and the fixing bracket 31 is used to stably support the accumulator 3 at the rear end of the fuel tank 1.

[0040] As a further improvement, the oil cylinder 6 is a double group and is provided with a top plate 61 below. A snap ring 63 is distributed on the outside of the oil cylinder 6. Both ends of the snap ring 63 are connected to the upper end of the top plate 61 by bolts. The top plate 61 is mounted on the left end of the oil tank 1 by bolts. A lining plate 62 is installed between the bottom outer end of the top plate 61 and the oil tank 1.

[0041] The output end of the oil cylinder 6 is connected to a piston rod 64, and a positioning ring 65 is fixed to the outer end of the piston rod 64;

[0042] The top plate 61 is used to extend toward the left end of the oil tank 1 to support and install two sets of oil cylinders 6. The retaining ring 63 is used to fasten the oil cylinder 6 to the upper end of the top plate 61. The lining plate 1 62 is used to strengthen the supporting strength of the top plate 61. The oil cylinder 6 is used to automatically control the telescopic adjustment of the piston rod 64. The positioning ring 65 is used for internal and external adjustment test detection.

[0043] Further improved, the oil cylinder test mechanism 7 includes a test support plate 71, a test monitoring device 711, an extension plate 1 72, and an extension plate 2 73. The extension plate 1 72 and the extension plate 2 73 are symmetrically fixed to the inner lower end of the test support plate 71, the inner end of the extension plate 1 72 is mounted on the front end of the oil tank 1, and the inner end of the extension plate 2 73 is fixed with a liner plate 2 74 with an italic structure, and the inner end of the liner plate 2 74 is mounted on the side end of the oil tank 1.

[0044] The test monitoring device 711 is provided at the upper end of the outer side of the test support plate 71;

[0045] The liner plate 2 74 with an italic structure is used to fix the extension plate 2 73 to the side end of the oil tank 1, the extension plate 2 73 is used to support the test support plate 71 toward the outer end, the extension plate 1 72 is used to support the test support plate 71 toward the front end of the oil tank 1, and the test monitoring device 711 is used to display the test process of the control power cylinder.

[0046] As a further improvement, a pressure detection plate 752 is provided at the front end of the test support plate 71. The front end of the pressure detection plate 752 is connected to an elastic connection structure 751. A push plate 75 is fixed to the front end of the elastic connection structure 751. A groove 750 is provided at the front end of the push plate 75. The interior of the groove 750 is an arc-shaped structure.

[0047] The pressure detection plate 752 is used for contact force, the multiple sets of elastic connection structures 751 are used for elastic compression detection pressure, and the arc-shaped groove 750 is used to accurately clamp the positioning ring 65 to avoid displacement, reduce the detection error rate, better adapt to the piston rod, and improve the accuracy of detection.

[0048] As a further improvement, a baffle 753 is fixed to the outer end of the groove 750, a through hole 7531 is formed inside the baffle 753, a spring rod 7532 is fixed to the outer end of the through hole 7531, an end plate 7534 is fixed to the outer end of the spring rod 7532, a positioning post 7533 is fixed to the inner end of the end plate 7534, the positioning post 7533 is located inside the spring rod 7532 and extends through the through hole 7531, and a pull rod 7535 is fixed to the outer end of the end plate 7534.

[0049] Through hole 1 7531 is used for movable adjustment of positioning column 7533, spring rod 1 7532 is used for elastically stretching end plate 1 7534 and positioning column 7533, pull rod 1 7535 is used for hand-held pulling operation, and positioning column 7533 is used to be inserted into the interior of positioning ring 65 to lock it to prevent shaking and deviation.

[0050] As a further improvement, a piston rod stability coefficient detection mechanism is provided at the bottom of the extension plate 1 72 and the extension plate 2 73. The piston rod stability coefficient detection mechanism includes a horizontal plate 76. The horizontal plate 76 is fixed to the bottom of the extension plate 1 72 and the extension plate 2 73, and the horizontal plate 76 is located below the front end of the oil cylinder 6.

[0051] A slide groove 760 is provided in the middle of the horizontal plate 76, and a slide plate 764 is slidably connected inside the slide groove 760. The upper and lower ends of the slide plate 764 are fixed with limit plates 7641, and the limit plates 7641 are slidably connected to the upper and lower ends of the horizontal plate 76. The lower end of the limit plate 7641 located at the bottom is fixed with an electric push rod device 761, and the upper end of the limit plate 7641 located at the top is fixed with a guide block 7611. The upper end of the electric push rod device 761 passes through the limit plate 7641, the slide plate 764 and the guide block 7611 and is connected to a telescopic rod 762. The upper end of the telescopic rod 762 is fixed with a support block 7621, and a spring ring 7622 is fixedly distributed above the support block 7621. The upper end of the spring ring 7622 is fixed with a supporting plate 763, and the upper part of the supporting plate 763 is a concave structure.

[0052] The piston rod stability coefficient detection mechanism is used to detect the stability coefficient of the piston rod during the telescopic movement. The horizontal plate 76 is used to support the piston rod stability coefficient detection mechanism to adjust the position laterally below the extension plate 1 72 and the extension plate 2 73. The electric push rod device 761 is used to lift and lower the telescopic rod 762. The telescopic rod 762 is used to support the support block 7621, the spring ring 7622 and the support plate 763 upward. The support plate 763 with an elastic support recessed structure is used to push the piston rod 64 and the positioning ring 65 upward. The spring ring 7622 plays a certain buffering role, thereby detecting whether the piston rod 64 leaks oil after the shaking adjustment, and whether the telescopic running trajectory of the piston rod 64 is normal.

[0053] Specifically, a bracket 765 is fixed to the rear of the lower end of the limit plate 7641. The bracket 765 is a right-angled plate structure and has a second through-hole 7651 at the bottom. A second spring rod 7652 is fixed below the second through-hole 7651. The lower end of the second spring rod 7652 is fixed to the second end plate 7654. The lower end of the second end plate 7654 is fixed to the second pull rod 7655. The upper end of the second end plate 7654 is fixed to a latch 7653.

[0054] A socket 7601 is provided in the middle of the front end of the horizontal plate 76, and a latch 7653 is connected to the inside of the socket 7601;

[0055] The bracket 765 with a right-angle plate structure is used to extend the spring rod 2 7652 toward the lower end of the limit plate 7641. The spring rod 2 7652 elastically supports the pin 7653 and the end plate 2 7654. The pin 7653 is located inside the socket 7601 and is plugged and locked to prevent movement during the detection process.

[0056] Working principle: Start the drive motor 2 to make the hydraulic oil pump 21 work, pump oil through the oil filter 22, and then pump it out through the pump pipe 24. After passing through the reversing valve 5, the oil inlet pipe 51 enters the inside of the oil cylinder 6, and then enters the reversing valve 5 through the oil outlet pipe 52. After that, it enters the relief valve 4 through the connecting pipe 41, and finally returns through the return pipe 23. This is the principle of the hydraulic workstation, which can start the reciprocating telescopic movement of the piston rod 64, so that the positioning ring 65 can be adjusted forward and backward, and the reciprocating telescopic speed of the piston rod 64 can be controlled.

[0057] When it is necessary to test the oil cylinder 6 and the piston rod 64, the positioning ring 65 is positioned at the groove 750, and the hand-held pull rod 7535 pulls the end plate 7534 and the positioning column 7533. The positioning column 7533 is adjusted to be movable inside the through hole 7531 through the elastic action of the spring rod 7532, and is inserted into the positioning ring 65 and locked; the expansion and contraction adjustment speed of the piston rod 64 is adjusted to the lowest, and the force is gradually increased to push the push plate 75 through the multiple sets of elastic connection structures 751 for compression, so that the pressure detection plate 752 detects the real-time pressure and displays it on the test monitoring device 711. The test monitoring device 711 can understand the working status of the power cylinder under different working conditions by analyzing the pressure change curve, and timely discover problems such as pressure anomalies, thereby providing a basis for the optimization design and fault diagnosis of the power cylinder;

[0058] The double-group power cylinder is designed for more accurate testing, and can be tested individually or in pairs simultaneously;

[0059] The second hand-held pull rod 7655 pulls the second end plate 7654 and the latch 7653 downward. The elastic action of the second spring rod 7652 causes the latch 7653 to move downward inside the socket 7601. Then, the position of the sliding plate 764 and the limit plate 7641 is adjusted by sliding horizontally inside the slide groove 760 so that they are located below a certain positioning ring 65. The electric push rod device 761 is started to automatically control the telescopic rod 762 to be adjusted up and down inside the guide block 7611. The support block 7621, the spring ring 7622 and the support plate 763 provide stable support. The bottom of the positioning ring 65 is lifted up so as to push back and forth to test the stability and fatigue resistance of the piston rod 64, more accurately detect whether there is oil leakage under the reciprocating piston movement, and promptly discover problems such as shaking and deviation of the piston rod 64 that may occur during the movement. The piston rod stability coefficient detection mechanism can more accurately detect the stability coefficient of the piston rod 64, and provide a reliable basis for the performance evaluation and improvement of the power cylinder, so that it can adapt to the detection needs of power cylinders of different specifications and models, regardless of whether the length, diameter or movement stroke of the piston rod 64 changes.

[0060] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0061] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A power cylinder test device, comprising a fuel tank (1), a drive motor (2), an accumulator (3), a relief valve (4), a reversing valve (5), a fuel cylinder (6), and a fuel cylinder test mechanism (7), characterized in that: The driving motor (2) is installed at the right end of the oil tank (1), and the driving motor (2) is connected to a hydraulic oil pump (21). An oil filter (22) is installed below the hydraulic oil pump (21). A return oil pipe (23) and a pump oil pipe (24) are installed above the hydraulic oil pump (21). The return oil pipe (23) is connected to the reversing valve (5) upward, and the pump oil pipe (24) is connected to the overflow valve (4) upward. The overflow valve (4) and the reversing valve (5) are both fixed to the oil tank. (1), the overflow valve (4) is connected to the accumulator (3) toward the rear, the side end of the overflow valve (4) is connected to a connecting pipe (41), the connecting pipe (41) is connected to the rear of the reversing valve (5), the front and rear of the reversing valve (5) are respectively connected to an oil inlet pipe (51) and an oil outlet pipe (52), the oil outlet pipe (52) and the oil inlet pipe (51) are respectively connected to the front and rear ends of the oil cylinder (6), and the oil cylinder test mechanism (7) is provided in front of the oil cylinder (6) for testing the power of the oil cylinder (6); The oil cylinder test mechanism (7) includes a test support plate (71), a test monitoring device (711), an extension plate 1 (72) and an extension plate 2 (73), wherein the extension plate 1 (72) and the extension plate 2 (73) are symmetrically fixed to the inner lower end of the test support plate (71), the inner end of the extension plate 1 (72) is mounted on the front end of the oil tank (1), and the inner end of the extension plate 2 (73) is fixed with a liner plate 2 (74) having an italic structure, and the inner end of the liner plate 2 (74) is mounted on the side end of the oil tank (1); The test monitoring device (711) is arranged at the upper end of the outer side of the test support plate (71); A piston rod stability coefficient detection mechanism is provided at the bottom of the extension plate 1 (72) and the extension plate 2 (73), and the piston rod stability coefficient detection mechanism includes a transverse plate (76). The transverse plate (76) is fixed to the bottom of the extension plate 1 (72) and the extension plate 2 (73), and the transverse plate (76) is located below the oil cylinder (6) near the front end; A slide groove (760) is provided in the middle of the horizontal plate (76), and a slide plate (764) is slidably connected inside the slide groove (760). The upper and lower ends of the slide plate (764) are fixed with limit plates (7641). The limit plates (7641) are slidably connected to the upper and lower ends of the horizontal plate (76). The lower end of the limit plate (7641) located at the bottom is fixed with an electric push rod device (761), and the upper end of the limit plate (7641) located at the top is fixed with a guide block ( 7611), the upper end of the electric push rod device (761) passes through the limit plate (7641), the sliding plate (764) and the guide block (7611) and is connected to the telescopic rod (762), the upper end of the telescopic rod (762) is fixedly provided with a support block (7621), the upper part of the support block (7621) is fixedly provided with a spring ring (7622), the upper end of the spring ring (7622) is fixedly provided with a support plate (763), and the upper part of the support plate (763) is a concave structure.

2. A power cylinder test device according to claim 1, characterized in that: The front and rear ends of the bottom of the oil tank (1) are fixedly provided with a base bracket (11) in the form of an I-steel structure, a refueling port (15) is provided at the upper rear portion of the oil tank (1), an inspection port (13) is installed in the middle of the front portion of the oil tank (1), an oil temperature gauge (12) is provided at the front right end of the oil tank (1), and an oil drain port (14) is provided at the front left end of the oil tank (1); A fixing frame (31) is fixedly provided on the outside of the accumulator (3), and the fixing frame (31) is fixedly provided on the rear end of the oil tank (1).

3. The power cylinder test device according to claim 1, characterized in that: The oil cylinder (6) is a double group and is provided with a top plate (61) below. A clamping ring (63) is distributed on the outside of the oil cylinder (6). Both ends of the clamping ring (63) are connected to the upper end of the top plate (61) by bolts. The top plate (61) is installed on the left end of the oil tank (1) by bolts. A lining plate (62) is installed between the bottom outer end of the top plate (61) and the oil tank (1). The output end of the oil cylinder (6) is connected to a piston rod (64), and a positioning ring (65) is fixed to the outer end of the piston rod (64).

4. The power cylinder test device according to claim 1, characterized in that: The front end of the test support plate (71) is provided with a pressure detection plate (752), the front end of the pressure detection plate (752) is connected to an elastic connection structure (751), the front end of the elastic connection structure (751) is fixedly provided with a push plate (75), the front end of the push plate (75) is provided with a groove (750), and the interior of the groove (750) is an arc-shaped structure.

5. The power cylinder test device according to claim 4, characterized in that: A baffle (753) is fixedly provided at the outer end of the groove (750), a through hole (7531) is opened inside the baffle (753), a spring rod (7532) is fixedly provided at the outer end of the through hole (7531), an end plate (7534) is fixedly provided at the outer end of the spring rod (7532), a positioning column (7533) is fixedly provided at the inner end of the end plate (7534), the positioning column (7533) is located inside the spring rod (7532) and is connected to the through hole (7531), and a pull rod (7535) is fixedly provided at the outer end of the end plate (7534).

6. The power cylinder test device according to claim 5, characterized in that: A bracket (765) is fixedly provided at the rear of the lower end of the limit plate (7641), the bracket (765) is a right-angle plate structure and has a second through hole (7651) at the bottom, a second spring rod (7652) is fixedly provided below the second through hole (7651), a second end plate (7654) is fixedly provided at the lower end of the second spring rod (7652), a second pull rod (7655) is fixedly provided at the lower end of the second end plate (7654), and a latch (7653) is fixedly provided at the upper end of the second end plate (7654); A socket (7601) is provided in the middle of the front end of the transverse plate (76), and the latch (7653) is connected to the inside of the socket (7601).

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