Test bed for testing forklift lifting hydraulic cylinder

Abstract

The utility model discloses a test bed for testing a forklift lifting hydraulic cylinder, and particularly relates to the technical field of test beds, which comprises a hydraulic cylinder bottom fixing seat, a moving trolley and a frame. The rack comprises forklift portal frame channel steel, a fixed bottom plate and a channel steel fixing plate; the bottom of the forklift portal frame channel steel is fixedly installed on the top face of the channel steel fixing plate, the bottoms of the hydraulic cylinder bottom fixing base, the center support and the channel steel fixing plate are all fixedly installed on the top face of the fixing bottom plate, and the side portion of the moving trolley slides on a guide rail of the forklift portal frame channel steel. And two ends of the tested hydraulic cylinder are respectively connected with the hydraulic cylinder bottom fixing seat and the moving trolley. According to the utility model, the forklift gantry channel steel is used as the guide rail, so that the guide rail has better strength, can bear larger unbalance loading force, and ensures that the piston rod runs along the guide rail, thereby ensuring the accuracy of a test deflection angle and being better close to the actual working environment of a forklift lifting hydraulic cylinder; and the unbalance loading resistance can be measured more accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of test benches, and more specifically to a test bench for testing a lifting hydraulic cylinder of a forklift. Background Art

[0002] It is known that the hydraulic cylinder used for forklift lifting needs to have good anti-eccentric load performance. However, in actual use, the hydraulic cylinder axis is not parallel to the guide rail, or the guide rail is insufficiently stiff, causing the piston rod to deviate from the cylinder axis when extended, thereby causing a large eccentric load on the hydraulic cylinder. It can be seen that, similar to the situation where the cylinder barrel of the lifting hydraulic cylinder on the forklift gantry is fixed and the end of the piston rod moves along the guide rail, the eccentric load condition of the hydraulic cylinder cannot be simply determined by the eccentric load force with a large error. Therefore, a test bench for testing forklift lifting hydraulic cylinders is proposed, in which the eccentric load condition of the hydraulic cylinder is determined by the deflection angle of the piston rod or the distance that the end of the piston rod deviates from the axis, so as to test the anti-eccentric load performance of the hydraulic cylinder at different deflection angles. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a test bench for testing a forklift lifting hydraulic cylinder to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a test bench for testing a forklift lifting hydraulic cylinder, the test bench comprising: a hydraulic cylinder bottom fixing seat, a center bracket, a mobile trolley and a frame;

[0005] The frame comprises: a forklift door frame channel steel, a fixed bottom plate and a channel steel fixing plate;

[0006] The bottom of the forklift gantry channel steel is fixedly mounted on the top surface of the channel steel fixing plate, the bottom of the hydraulic cylinder bottom fixing seat, the center bracket and the channel steel fixing plate are all fixedly mounted on the top surface of the fixing bottom plate, the hydraulic cylinder bottom fixing seat and the center bracket are both located between the two forklift gantry channel steels, and the guide rails on the side where the two forklift gantry channel steels are close to each other are slidably connected to the two sides of the mobile trolley;

[0007] The hydraulic cylinder bottom fixing seat is close to the end of the forklift gantry channel steel, the central bracket is located between the mobile trolley and the hydraulic cylinder bottom fixing seat, the tested hydraulic cylinder is placed on the central bracket, one end of the tested hydraulic cylinder is connected to the hydraulic cylinder bottom fixing seat, and the other end of the tested hydraulic cylinder is connected to the mobile trolley.

[0008] Furthermore, the hydraulic cylinder bottom fixing seat comprises: a cylinder bottom fixing plate, a base, a fixing seat reinforcement rib, a vertical plate, an adjusting top screw and a fixing bolt;

[0009] The cylinder bottom fixing plate is connected to one side of the vertical plate by adjusting the top screw and the fixing bolts, the bottom of the vertical plate is fixedly connected to the top of the base, the two mutually perpendicular surfaces of the fixing seat reinforcement ribs are respectively fixedly connected to the other side of the vertical plate and the top of the base, and the side of the cylinder bottom fixing plate away from the vertical plate is connected to one end of the hydraulic cylinder to be tested.

[0010] Further, the center support comprises: a center support bottom plate, a center support reinforcing rib, a V-shaped plate, a center support pressure plate and pressure plate bolts;

[0011] The bottom of the V-shaped plate is fixedly connected to the top of the center frame bottom plate, the two mutually perpendicular surfaces of the center frame reinforcement ribs are respectively fixedly connected to one side of the V-shaped plate and the top surface of the center frame bottom plate, the center frame pressure plate is connected to the top of the V-shaped plate by a pressure plate bolt, and the tested hydraulic cylinder is placed in the V-shaped plate groove between the V-shaped plate and the center frame pressure plate.

[0012] Furthermore, the mobile trolley comprises: a trolley bracket, a side roller shaft, a side roller, a positive roller shaft, a positive roller, a piston rod connecting flange, a flange top screw and a flange fixing bolt;

[0013] Side brackets are fixedly installed on both sides of the trolley bracket, and two adjacent side brackets are rotatably connected to the two ends of the side roller shaft respectively, and the side roller is movably sleeved on the side roller shaft;

[0014] The positive roller shaft is fixedly connected to the side of the trolley bracket and close to the side bracket, and the positive roller is movably sleeved on the positive roller shaft;

[0015] The side rollers and the positive rollers are both located in the guide rails on the channel steel of the forklift mast;

[0016] The piston rod connecting flange is connected to one side of the trolley bracket through a flange top screw and a flange fixing bolt.

[0017] Further, the tested hydraulic cylinder comprises: a piston rod and a cylinder body;

[0018] The piston rod slides inside the cylinder body, and one end of the piston rod passing through the cylinder body is connected to the piston rod connecting flange, the end of the cylinder body away from the piston rod is connected to the hydraulic cylinder bottom fixing seat, and the end of the cylinder body close to the piston rod is placed in the V-shaped plate groove between the V-shaped plate and the center frame pressure plate.

[0019] Furthermore, the shapes of the fixing seat reinforcement ribs, the center frame reinforcement ribs and the channel steel reinforcement ribs are all set to be right-angled triangle shapes.

[0020] Furthermore, the frame also includes: channel steel reinforcement ribs and a support frame;

[0021] The two mutually perpendicular surfaces of the channel steel reinforcement ribs are respectively fixedly connected to one side of the forklift door frame channel steel and the top surface of the channel steel fixing plate, and the top of the support frame is fixedly installed on the bottom of the fixed bottom plate.

[0022] Technical effects and advantages of the utility model:

[0023] 1. Compared with the prior art, by setting the forklift mast channel steel and using the forklift mast channel steel as a guide rail, it has better strength and can bear a larger eccentric load force, ensuring that the piston rod runs along the guide rail, thereby ensuring the accuracy of the test deflection angle, and can also better fit the actual working environment of the forklift lifting hydraulic cylinder; by measuring the deflection angle, the measurement of anti-eccentric load performance is more accurate.

[0024] 2. The present invention tests the performance and life of the hydraulic cylinder at different deflection angles, thereby detecting the allowable offset angle of the hydraulic cylinder or the offset of the piston rod end during operation, so as to better control the installation conditions of the hydraulic cylinder and ensure the service life of the hydraulic cylinder. Therefore, the anti-deflection ability of different hydraulic cylinders can be accurately tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure 2 It is a structural schematic diagram of the bottom fixing seat of the hydraulic cylinder of the utility model.

[0027] Figure 3 It is a structural schematic diagram of the central support of the utility model.

[0028] Figure 4 It is a structural schematic diagram of the mobile vehicle of the utility model.

[0029] Figure 5 It is a structural schematic diagram of the frame of the utility model.

[0030] Figure 6 It is a structural schematic diagram of the tested hydraulic cylinder of the utility model.

[0031] Figure 7 For this utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0032] Figure 8 This is a schematic diagram showing the installation angle α of the tested hydraulic cylinder of the utility model.

[0033] The accompanying drawings are marked as follows:

[0034] 1. Hydraulic cylinder bottom fixing seat;

[0035] 11. Cylinder bottom fixing plate; 12. Base; 13. Fixing seat reinforcement rib;

[0036] 14. Vertical plate; 15. Adjusting top screw; 16. Fixing bolt;

[0037] 2. Center bracket;

[0038] 21. Center frame bottom plate; 22. Center frame reinforcement rib; 23. V-shaped plate;

[0039] 24. Center frame pressure plate; 25. Pressure plate bolts;

[0040] 3. Mobile car;

[0041] 31. Trolley bracket; 32. Side roller shaft; 33. Side roller; 34. Positive roller shaft; 35. Positive roller; 36. Piston rod connecting flange; 37. Flange top screw; 38. Flange fixing bolt; 39. Side bracket; 4. Frame;

[0042] 41. Forklift mast channel steel; 42. Fixed bottom plate; 43. Channel steel fixing plate;

[0043] 44. Channel steel reinforcement; 45. Support frame;

[0044] 5. Hydraulic cylinder to be tested; 51. Piston rod; 52. Cylinder body; 53. Axis;

[0045] 6. α. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0047] As attached Figure 1-8 A test bench for testing a forklift lifting hydraulic cylinder is shown, the test bench comprising: a hydraulic cylinder bottom fixing seat 1, a center bracket 2, a moving trolley 3 and a frame 4;

[0048] The frame 4 includes: a forklift door frame channel steel 41, a fixed bottom plate 42 and a channel steel fixing plate 43;

[0049] The bottom of the forklift gantry channel steel 41 is fixedly mounted on the top surface of the channel steel fixing plate 43, the bottom of the hydraulic cylinder bottom fixing seat 1, the center bracket 2 and the channel steel fixing plate 43 are all fixedly mounted on the top surface of the fixed bottom plate 42, the hydraulic cylinder bottom fixing seat 1 and the center bracket 2 are both located between the two forklift gantry channel steels 41, and the guide rails on one side of the two forklift gantry channel steels 41 close to each other are slidably connected to the two sides of the mobile trolley 3;

[0050] The hydraulic cylinder bottom fixing seat 1 is close to the end of the forklift door frame channel steel 41, and the central bracket 2 is located between the moving trolley 3 and the hydraulic cylinder bottom fixing seat 1. The tested hydraulic cylinder 5 is placed on the central bracket 2, and one end of the tested hydraulic cylinder 5 is connected to the hydraulic cylinder bottom fixing seat 1, and the other end of the tested hydraulic cylinder 5 is connected to the moving trolley 3.

[0051] The hydraulic cylinder bottom fixing seat 1 and the center bracket 2 are connected to the fixed bottom plate 42 in the frame 4 by bolts, and the moving trolley 3 moves along the guide rail of the forklift door frame channel steel 41 on the frame 4.

[0052] In this embodiment, two hydraulic cylinder bottom fixing seats 1 and two center brackets 2 are provided to test two tested hydraulic cylinders 5, that is, the two tested hydraulic cylinders 5 drive the moving trolley 3 to move on the forklift door frame channel steel 41;

[0053] Among them, the tested hydraulic cylinder 5 is a single-rod hydraulic cylinder;

[0054] Tested hydraulic cylinder 5 embodiment:

[0055] The tested hydraulic cylinder 5 comprises: a piston rod 51 and a cylinder body 52;

[0056] The piston rod 51 slides inside the cylinder body 52. ​​One end of the piston rod 51 passing through the cylinder body 52 is connected to the piston rod connecting flange 36. The end of the cylinder body 52 away from the piston rod 51 is connected to the hydraulic cylinder bottom fixing seat 1. The end of the cylinder body 52 close to the piston rod 51 is placed in the groove of the V-shaped plate 23 between the V-shaped plate 23 and the center frame pressure plate 24.

[0057] Wherein, the center axis of the cylinder body 52 is set as the axis 53, and the piston rod 51 slides along the axis 53 of the cylinder body 52 when not subject to side load. When the hydraulic cylinder and the guide rail are installed at an angle or the guide rail is not rigid enough, the end of the piston rod 51 will deviate from the axis 53;

[0058] Therefore, it is convenient to test the life and performance of the hydraulic cylinder body 52 when it is installed at different inclination angles with the forklift gantry channel steel 41.

[0059] Among them, the oil inlet of the hydraulic cylinder is connected to the hydraulic pump station, and the trial operation, pressure resistance, leakage, buffer and durability tests are completed in sequence according to the national standard GBT_15622-2005 "Hydraulic Cylinder Test Method" to detect the performance and life of the tested hydraulic cylinder at different deflection angles.

[0060] Among them, since the length of the piston rod 51 extending out of the cylinder body 52 of the tested hydraulic cylinder 5 changes, the angle between the tested hydraulic cylinder 5 and the hydraulic cylinder bottom fixing seat 1 connected thereto changes; similarly, the angle between the tested hydraulic cylinder 5 and the trolley bracket 31 connected thereto changes, so the tested hydraulic cylinder 5 and the hydraulic cylinder bottom fixing seat 1 and the tested hydraulic cylinder 5 and the trolley bracket 31 are both rotatably connected with adjustable angles;

[0061] The angle between the tested hydraulic cylinder 5 and the fixed bottom plate 42 is set to α6.

[0062] In a preferred embodiment, as shown in the attached Figure 1-8 As shown, the hydraulic cylinder bottom fixing seat 1 comprises: a cylinder bottom fixing plate 11, a base 12, a fixing seat reinforcing rib 13, a vertical plate 14, an adjusting top screw 15 and a fixing bolt 16;

[0063] The cylinder bottom fixing plate 11 is connected to one side of the vertical plate 14 by adjusting the top screw 15 and the fixing bolt 16, the bottom of the vertical plate 14 is fixedly connected to the top of the base 12, the two mutually perpendicular surfaces of the fixing seat reinforcement rib 13 are respectively fixedly connected to the other side of the vertical plate 14 and the top of the base 12, and the side of the cylinder bottom fixing plate 11 away from the vertical plate 14 is connected to one end of the hydraulic cylinder 5 to be tested.

[0064] The hole through which the cylinder bottom fixing plate 11 and the vertical plate 14 are connected by the fixing bolts 16 is a waist-shaped hole, which can realize the adjustment of the height of the cylinder bottom fixing plate 11. The adjusting screw 15 can adjust the deflection angle of the cylinder bottom fixing plate 11 relative to the vertical plate 14, thereby adjusting the deflection angle and height of the cylinder body 52 of the tested hydraulic cylinder 5 fixed on the cylinder bottom fixing plate 11;

[0065] In a preferred embodiment, as shown in the attached Figure 1-8 As shown, the center support 2 includes: a center support bottom plate 21, a center support reinforcement rib 22, a V-shaped plate 23, a center support pressure plate 24 and a pressure plate bolt 25;

[0066] The bottom of the V-shaped plate 23 is fixedly connected to the top of the center frame bottom plate 21, and the two mutually perpendicular surfaces of the center frame reinforcement rib 22 are respectively fixedly connected to one side of the V-shaped plate 23 and the top surface of the center frame bottom plate 21. The center frame pressure plate 24 is connected to the top of the V-shaped plate 23 through the pressure plate bolts 25, and the tested hydraulic cylinder 5 is placed in the groove of the V-shaped plate 23 between the V-shaped plate 23 and the center frame pressure plate 24.

[0067] The center frame bottom plate 21, the center frame reinforcement rib 22, and the V-shaped plate 23 can be connected by welding, and the center frame pressure plate 24 is connected to the V-shaped plate 23 by the pressure plate bolts 25; and the cylinder body 52 of the tested hydraulic cylinder 5 is placed in the groove of the V-shaped plate 23 between the V-shaped plate 23 and the center frame pressure plate 24.

[0068] In a preferred embodiment, as shown in the attached Figure 1-8 As shown, the mobile trolley 3 includes: a trolley bracket 31, a side roller shaft 32, a side roller 33, a positive roller shaft 34, a positive roller 35, a piston rod connecting flange 36, a flange top screw 37 and a flange fixing bolt 38;

[0069] Side brackets 39 are fixedly installed on both sides of the trolley bracket 31. Two adjacent side brackets 39 are rotatably connected to the two ends of the side roller shaft 32 respectively. The side roller 33 is movably sleeved on the side roller shaft 32.

[0070] The positive roller shaft 34 is fixedly connected to the side of the trolley bracket 31 and close to the side bracket 39, and the positive roller 35 is movably sleeved on the positive roller shaft 34;

[0071] The side rollers 33 and the positive rollers 35 are both located in the guide rails on the forklift mast channel steel 41;

[0072] The piston rod connecting flange 36 is connected to one side of the trolley bracket 31 through a flange top screw 37 and a flange fixing bolt 38 .

[0073] The hole sleeve of the side roller 33 can rotate relative to the side roller shaft 32, and the side roller shaft 32 is connected to the side bracket 39 on the trolley bracket 31 by interference fit; the hole sleeve of the positive roller 35 can rotate relative to the positive roller shaft 34, and the positive roller shaft 34 is connected to the trolley bracket 31 by bolts;

[0074] The inclination angle of the piston rod connecting flange 36 can be adjusted by the flange top screw 37, thereby adjusting the deflection angle of the piston rod 51 connected thereto;

[0075] In a preferred embodiment, as shown in the attached Figure 1-8 As shown, the shapes of the fixing seat reinforcement ribs 13, the center frame reinforcement ribs 22 and the channel steel reinforcement ribs 44 are all set to be right-angled triangles, so as to utilize the stability of the triangle, not only to improve the supporting effect, but also to save costs.

[0076] In a preferred embodiment, as shown in the attached Figure 1-8 As shown, the frame 4 also includes: channel steel reinforcement ribs 44 and a support frame 45;

[0077] The two mutually perpendicular surfaces of the channel steel reinforcement rib 44 are respectively fixedly connected to one side of the forklift door frame channel steel 41 and the top surface of the channel steel fixing plate 43 , and the top of the support frame 45 is fixedly installed on the bottom of the fixed bottom plate 42 .

[0078] The forklift door frame channel steel 41 is connected to the channel steel reinforcement rib 44 and the channel steel fixing plate 43 by bolts, the channel steel fixing plate 43 is fixed to the fixing bottom plate 42 by bolts, and the fixing bottom plate 42 is welded to the support frame 45 .

[0079] Working principle of the utility model: when in use, the tested hydraulic cylinder 5 is installed on the test bench, the cylinder bottom end of the cylinder body 52 in the tested hydraulic cylinder 5 is connected to the vertical plate 14 of the hydraulic cylinder bottom fixing seat 1 by bolts, the installation inclination angle α6 of the cylinder body 52 is adjusted by the waist-shaped hole on the vertical plate 14 and the adjusting top screw 15, and the cylinder body 52 is fixed by the central bracket 2, so as to realize the installation of the cylinder body 52 at different inclination angles α6 with the forklift door frame channel steel 41; the end of the piston rod 51 is connected to the moving trolley 3, and moves along the forklift door frame channel steel 41 with the moving trolley 3;

[0080] Subsequently, the oil inlet of the hydraulic cylinder is connected to the hydraulic pump station, and the test operation, pressure resistance, leakage, buffer and durability tests are completed in sequence according to the national standard GBT_15622-2005 "Hydraulic Cylinder Test Method" to detect the performance and life of the tested hydraulic cylinder at different deflection angles.

[0081] It should be noted that, in this article, relational terms such as first and second, etc. 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.

[0082] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test bench for testing a forklift lifting hydraulic cylinder, characterized in that: The test bench comprises: a hydraulic cylinder bottom fixing seat (1), a central support (2), a moving trolley (3) and a frame (4); The frame (4) comprises: a forklift door frame channel steel (41), a fixed bottom plate (42) and a channel steel fixing plate (43); The bottom of the forklift portal channel steel (41) is fixedly mounted on the top surface of the channel steel fixing plate (43); the bottom of the hydraulic cylinder bottom fixing seat (1), the center bracket (2) and the channel steel fixing plate (43) are all fixedly mounted on the top surface of the fixed bottom plate (42); the hydraulic cylinder bottom fixing seat (1) and the center bracket (2) are both located between the two forklift portal channel steels (41); the guide rails on one side of the two forklift portal channel steels (41) close to each other are slidably connected to the two sides of the moving trolley (3); The hydraulic cylinder bottom fixing seat (1) is close to the end of the forklift portal frame channel steel (41), the central support (2) is located between the moving trolley (3) and the hydraulic cylinder bottom fixing seat (1), a tested hydraulic cylinder (5) is placed on the central support (2), one end of the tested hydraulic cylinder (5) is connected to the hydraulic cylinder bottom fixing seat (1), and the other end of the tested hydraulic cylinder (5) is connected to the moving trolley (3).

2. A test bench for testing a forklift lifting hydraulic cylinder according to claim 1, characterized in that: The hydraulic cylinder bottom fixing seat (1) comprises: a cylinder bottom fixing plate (11), a base (12), a fixing seat reinforcing rib (13), a vertical plate (14), an adjusting top screw (15) and a fixing bolt (16); The cylinder bottom fixing plate (11) is connected to one side of the vertical plate (14) through an adjusting top screw (15) and a fixing bolt (16); the bottom of the vertical plate (14) is fixedly connected to the top of the base (12); two mutually perpendicular surfaces of the fixing seat reinforcing rib (13) are respectively fixedly connected to the other side of the vertical plate (14) and the top of the base (12); and the side of the cylinder bottom fixing plate (11) away from the vertical plate (14) is connected to one end of the hydraulic cylinder (5) to be tested.

3. A test bench for testing a forklift lifting hydraulic cylinder according to claim 2, characterized in that: The central support (2) comprises: a central support bottom plate (21), a central support reinforcing rib (22), a V-shaped plate (23), a central support pressure plate (24) and pressure plate bolts (25); The bottom of the V-shaped plate (23) is fixedly connected to the top of the center frame bottom plate (21); the two mutually perpendicular surfaces of the center frame reinforcing rib (22) are respectively fixedly connected to one side of the V-shaped plate (23) and the top surface of the center frame bottom plate (21); the center frame pressure plate (24) is connected to the top of the V-shaped plate (23) via a pressure plate bolt (25); and the tested hydraulic cylinder (5) is placed in a groove of the V-shaped plate (23) between the V-shaped plate (23) and the center frame pressure plate (24).

4. A test bench for testing a forklift lifting hydraulic cylinder according to claim 3, characterized in that: The mobile trolley (3) comprises: a trolley bracket (31), a side roller shaft (32), a side roller (33), a positive roller shaft (34), a positive roller (35), a piston rod connecting flange (36), a flange top screw (37) and a flange fixing bolt (38); Side brackets (39) are fixedly installed on both sides of the trolley bracket (31), and two adjacent side brackets (39) are rotatably connected to the two ends of the side roller shaft (32) respectively, and the side roller (33) is movably sleeved on the side roller shaft (32); The positive roller shaft (34) is fixedly connected to the side of the trolley bracket (31) and close to the side bracket (39), and the positive roller (35) is movably sleeved on the positive roller shaft (34); The side rollers (33) and the positive rollers (35) are both located in guide rails on the forklift portal frame channel steel (41); The piston rod connecting flange (36) is connected to one side of the trolley bracket (31) through a flange top screw (37) and a flange fixing bolt (38).

5. A test bench for testing a forklift lifting hydraulic cylinder according to claim 4, characterized in that: The tested hydraulic cylinder (5) comprises: a piston rod (51) and a cylinder body (52); The piston rod (51) slides inside the cylinder body (52); one end of the piston rod (51) passing through the cylinder body (52) is connected to the piston rod connecting flange (36); one end of the cylinder body (52) away from the piston rod (51) is connected to the hydraulic cylinder bottom fixing seat (1); and one end of the cylinder body (52) close to the piston rod (51) is placed in the groove of the V-shaped plate (23) between the V-shaped plate (23) and the center frame pressure plate (24).

6. A test bench for testing a forklift lifting hydraulic cylinder according to claim 5, characterized in that: The shapes of the fixing seat reinforcement ribs (13), the center frame reinforcement ribs (22) and the channel steel reinforcement ribs (44) are all set to be right-angled triangle shapes.

7. The test bench for testing a forklift lifting hydraulic cylinder according to claim 1, characterized in that: The frame (4) further comprises: channel steel reinforcement ribs (44) and a support frame (45); The two mutually perpendicular surfaces of the channel steel reinforcement rib (44) are respectively fixedly connected to one side of the forklift door frame channel steel (41) and the top surface of the channel steel fixing plate (43), and the top of the support frame (45) is fixedly mounted on the bottom of the fixed bottom plate (42).

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