A forklift drive axle test tool

Abstract

The present invention belongs to the technical field of forklift test equipment, and specifically relates to a forklift drive axle test fixture. It includes a square base, a pair of horizontal brackets, a front force distribution frame and a rear force distribution frame; each horizontal bracket includes a wheel bridge tube, the front force distribution frame includes a front door frame, the lower part of the front door frame is provided with a suspension, the suspension is cantilevered toward the end of the square base, and a load-bearing plate is provided on the cantilevered end of the suspension; the rear force distribution frame includes a rear door frame, the opening direction of the rear door frame is parallel to the width direction of the square base, and the rear door frame is upright fixed on the square base through a mounting frame at the bottom; it also includes a pair of screw nut mechanisms, the axial ends of each screw nut mechanism are rotatably installed on the front door frame and the rear door frame, and the axial length of each screw nut mechanism is adjusted so that the front door frame is vertically arranged above the square base; therefore, the present invention simulates the actual working conditions of the forklift drive axle, can carry out static strength test and fatigue endurance test of the forklift drive axle, and has a simple structure and strong maintainability.

Description

Technical Field

[0001] The invention belongs to the technical field of forklift testing equipment, and in particular relates to a forklift drive axle testing tool. Background Art

[0002] The forklift drive axle is the main load-bearing structural part of the forklift. It is installed and connected to the mast, frame and wheels. The forces it is subjected to are relatively complex and severe, especially when the mast is in cargo operation. The static strength test and fatigue endurance test of the forklift drive axle are the main inspection items of the manufacturer.

[0003] The current mainstream forklift drive axle test bench equipment is mainly used to examine the strength under the vertical force of the portal frame, but it is unable to examine the strength under the horizontal force of the portal frame and the force of the frame. This causes the test bench to be unable to simulate the actual stress conditions well, and even causes the forklift drive axle products that have passed the test bench to still have strength problems in the market. Summary of the invention

[0004] In view of this, the present invention aims to propose a forklift drive axle test bench to better simulate actual stress conditions and more comprehensively examine the strength of the forklift drive axle under the forces exerted by the gantry, frame and wheels.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the present invention is as follows: a forklift drive axle test fixture, comprising a square base 1, a pair of horizontal brackets 2 are arranged in the width direction of the square base 1, and a front force distribution frame 3 and a rear force distribution frame 4 are arranged in the length direction of the square base 1 corresponding to the pair of horizontal brackets 2;

[0006] Each horizontal bracket includes a wheel bridge cylinder 21, which is installed on the square base 1 through a bridge cylinder base, and the axial direction of the wheel bridge cylinder 21 is parallel to the width direction of the square base 1;

[0007] The front force distribution frame 3 includes a front door frame 32, the opening direction of the front door frame 32 is parallel to the width direction of the square base 1; a suspension 36 is provided at the lower part of the front door frame 32, the suspension 36 is cantilevered toward the end of the square base 1, and a load-bearing plate 31 is provided on the cantilevered end of the suspension 36;

[0008] A pair of upright door bridge plates are correspondingly provided at the bottom of the front door frame 32, and the extension direction of the door bridge plates is opposite to the overhang direction of the suspension frame 36, and a pair of door frame mounting holes are correspondingly opened on the extended ends of the pair of door bridge plates;

[0009] The rear force distribution frame 4 includes a rear door frame 46, the opening direction of the rear door frame 46 is parallel to the width direction of the square base 1, and the rear door frame 46 is uprightly fixed on the square base 1 through the mounting frame 41 at the bottom;

[0010] A pair of vehicle bridge plates are movably provided on the vertical parts on both sides of the rear door frame 46, and the vehicle bridge plates extend toward the door bridge plates, and a pair of vehicle frame mounting holes are correspondingly provided on the extended ends of the pair of vehicle bridge plates;

[0011] It also includes a pair of screw nut mechanisms, and the axial ends of each screw nut mechanism 5 are rotatably mounted on the front door frame 32 and the rear door frame 46, and the axial length of each screw nut mechanism 5 is adjusted so that the front door frame 32 is vertically arranged above the square base 1;

[0012] During operation, a pair of gantry supports 81 of the forklift drive axle 8 and a pair of gantry mounting holes are installed correspondingly, a pair of frame supports 82 of the forklift drive axle 8 and a pair of frame mounting holes are installed correspondingly, a pair of wheel supports 83 of the forklift drive axle 8 and a pair of wheel axle tubes on a pair of horizontal brackets 2 are inserted correspondingly, and the hydraulic press 7 applies vertical force to the test fixture through the load-bearing plate 31 to simulate the actual stress condition of the forklift drive axle 8.

[0013] Furthermore, each of the screw-nut mechanisms 5 comprises a coaxially arranged sleeve 52 with an internal thread and a pair of screws 51, wherein the pair of screws 51 are respectively inserted at the front and rear ends of the sleeve 52 and are locked and fixed by a locking nut 53;

[0014] The screw rod cantilever end corresponding to the front end of each sleeve 52 is rotatably mounted on the front door frame 32 through the front support plate 35, and the screw rod cantilever end corresponding to the rear end of the sleeve 52 is rotatably mounted on the rear door frame 46 through the rear support plate 47, so that the front end of each sleeve 52 is higher than the rear end of the sleeve 52.

[0015] Furthermore, the rear support plate 47 is horizontally fixed between the openings of the rear door frame 46, and a pair of rear support ears are provided at the lower end of the rear support plate 47. Both ends of each screw rod are fixed with a U-shaped plate.

[0016] Each rear support ear is engaged between the openings of the corresponding U-shaped plate and fixed by a rod pin 54, so that the rear end of the sleeve 52 is rotatably mounted on the rear support plate 47;

[0017] The front support plate 35 is horizontally arranged between the openings of the front door frame 32, and a pair of front support ears are provided at the upper end of the front support plate 35, each front support ear is engaged between the openings of the corresponding U-shaped plate and fixed by a rod pin 54, so that the front end of the sleeve 52 is rotatably mounted on the front support plate 35;

[0018] Vertical plates are fixed at both ends of the front support plate 35, and horizontal waist-shaped holes are opened at the upper and lower ends of each vertical plate. Vertical waist-shaped holes are correspondingly opened on the vertical parts on both sides of the front door frame 32. By adjusting the bolt locking positions of the horizontal waist-shaped holes and the corresponding vertical waist-shaped holes, the fixed height of the front support plate 35 on the front door frame 32 is adjusted, and the axial inclination of the screw nut mechanism 5 is adjusted to test the installation angle of the simulated hydraulic cylinder on the forklift.

[0019] Further, the suspension 36 includes a pair of inverted triangle horizontal brackets, and the upper ends of the bottoms of a pair of triangles on the pair of horizontal brackets are fixed to the front door frame 32 through a horizontal upper mounting plate, and the lower ends of the bottoms of a pair of triangles are fixed to the front door frame 32 through a horizontal lower mounting plate, and a vertical support plate is arranged between the two sides of each triangle;

[0020] The pair of upper plates of the pair of triangles are each provided with waist-shaped holes, and the waist-shaped holes are opened along the length direction of the corresponding upper plates. The two ends of the load-bearing plate 31 are fastened to the pair of upper plates by bolts, and the horizontal distance between the load-bearing plate 31 and the front door frame 32 is adjusted by adjusting the locking position of the bolts on the waist-shaped holes.

[0021] Furthermore, each of the gate bridge plates includes a gate bridge front plate 33 and a gate bridge rear plate 34. One end of the gate bridge front plate 33 is fixed to the bottom of the front door frame 32 by means of bolts and the horizontal waist-shaped holes at the bottom of the front door frame 32. The other end of the gate bridge front plate 33 is provided with a first semicircular slot hole, and one end of the gate bridge rear plate 34 is provided with a second semicircular slot hole. The gate bridge front plate 33 and the gate bridge rear plate 34 are fixed by bolts so that the first semicircular slot hole and the second semicircular slot hole are matched to form a gate bridge mounting hole.

[0022] Further, each of the axle plates comprises an axle front plate 44, an axle rear plate 45 and a wheel plate 43 connected in sequence, an axle roller 42 is mounted on one end of the wheel plate 43, the vertical portions on both sides of the rear door frame 46 are both vertically arranged channel steels, the axle rollers 42 are movably arranged in the channel steels, so that the corresponding end of the wheel plate 43 is movably connected to the vertical portion of the rear door frame 46, the other end of the wheel plate 43 is fixedly mounted on one end of the axle front plate 44 by bolts and the horizontal waist-shaped holes of the axle front plate 44, the other end of the axle front plate 44 is provided with a third semicircular slot hole, and one end of the axle rear plate 45 is provided with a fourth semicircular slot hole, the axle front plate 44 and the axle rear plate 45 are locked and fixed by bolts, so that the third semicircular slot hole and the fourth semicircular slot hole are matched to form an axle mounting hole;

[0023] Furthermore, the mounting frame 41 is a square welded part, and waist-shaped holes are respectively opened on the square side plates, each waist-shaped hole is opened along the corresponding side plate, and the mounting frame 41 is fixed to the square base 1 by the cooperation of bolts and waist-shaped holes; the bottom end of the rear door frame 46 is fixed to one side of the square welded part, and the upper end of the rear door frame 46 is fixed by a pair of diagonal braces, and the lower ends of the pair of diagonal braces are fixed to the other side of the square welded part.

[0024] Furthermore, the bridge tube base includes an upper distance adjusting frame 22, a T-shaped lower distance adjusting frame 23 and a square distance adjusting plate 25.

[0025] The distance adjusting plate 25 is provided with a long groove in the width direction and a plurality of waist-shaped holes in the length direction. The distance adjusting plate 25 is fixedly mounted on the square base 1 through the cooperation between the bolts and the waist-shaped holes on the distance adjusting plate 25, and the distance adjusting plate 25 and the square base 1 have the same length extension direction.

[0026] A pair of lower rollers 24 are provided on both sides of the vertical portion of the lower distance adjusting frame 23 through a rotating shaft. The bottom end of the vertical portion of the lower distance adjusting frame 23 is inserted into the long groove and is rollingly installed through the pair of lower rollers 24 .

[0027] Furthermore, the test fixture further includes an anti-tilt mechanism 6, which includes a circular box sealing plate 64, a pair of connecting plates and an anti-tilt fixing plate 65 vertically fixed on the square base 1;

[0028] The sealing plate 64 and the box flange 84 of the forklift drive axle are fixedly connected by bolts, and a pair of connecting plates are arranged horizontally and correspond to the radial ends of the sealing plate 64. One end of each connecting plate corresponding to the sealing plate 64 is U-shaped, and an anti-rollover wheel 63 is installed between the openings of the U-shape through a rotating shaft, and the other end of each connecting plate is fixed on the anti-rollover fixing plate 65.

[0029] Furthermore, each of the connecting plates includes a first connecting plate 62 and a second connecting plate 61 arranged in the same direction, one end of the first connecting plate 62 is U-shaped, the other end of the first connecting plate 62 and the corresponding end of the second connecting plate 61 are locked and fixed through waist-shaped holes and bolts, and the other end of the second connecting plate 61 is bolted to the anti-rollover fixing plate 65.

[0030] The beneficial technical effects of the present invention are as follows:

[0031] The forklift drive axle test fixture of the present invention comprises a square base, a pair of horizontal brackets, a front force distribution frame and a rear force distribution frame;

[0032] Each horizontal support includes a wheel bridge tube, the front force distribution frame includes a front door frame, a suspension is provided at the lower part of the front door frame, the suspension is cantilevered toward the end of the square base, and a load-bearing plate is provided on the cantilevered end of the suspension; the rear force distribution frame includes a rear door frame, the opening direction of the rear door frame is parallel to the width direction of the square base, and the rear door frame is upright fixed on the square base through a mounting frame at the bottom;

[0033] It also includes a pair of screw rod and nut mechanisms, the axial ends of each screw rod and nut mechanism are rotatably mounted on the front door frame and the rear door frame, and the axial length of each screw rod and nut mechanism is adjusted so that the front door frame is vertically arranged above the square base;

[0034] The hydraulic press applies vertical force to the test fixture through the load-bearing plate, a pair of horizontal brackets are respectively used to simulate the left and right wheels of a forklift, the front force distribution frame is used to simulate the forklift mast, the rear force distribution frame is used to simulate the forklift frame, the screw nut mechanism is used to simulate the hydraulic cylinder between the frame and the mast, and the positive pressure of the hydraulic press is equivalent to the cargo load. Therefore, the test fixture of the present invention can simulate the actual stress condition of the forklift drive axle when working; not only the static strength test of the forklift drive axle can be carried out, but also the fatigue endurance test of the forklift drive axle can be carried out; at the same time, the distance between the pair of horizontal brackets is adjustable, the distance from the load-bearing plate to the front mast is adjustable, and the distance from the load-bearing plate to the axis of the forklift drive axle is adjustable to adapt to the wheelbase, front overhang and load center distance of different forklifts. Therefore, the test fixture of the present invention is applicable to forklift drive axles of various tonnages and models, and has a simple structure and strong maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the test tooling of the present invention.

[0036] Figure 2 It is a schematic structural diagram of the horizontal support of the present invention.

[0037] Figure 3 It is a structural schematic diagram of the front force distribution frame of the present invention.

[0038] Figure 4 It is a structural schematic diagram of the rear force distribution frame of the present invention.

[0039] Figure 5 It is a structural schematic diagram of the screw-nut mechanism of the present invention.

[0040] Figure 6 It is a structural schematic diagram of the anti-tilt mechanism of the present invention.

[0041] Figure 7 This is a working status diagram of the invention test tooling.

[0042] Among them: 1 square base, 2 a pair of horizontal brackets, 21 wheel bridge tube, 22 upper distance adjustment frame, 23 lower distance adjustment frame, 24 a pair of lower rollers, 25 distance adjustment plate, 3 front force distribution frame, 31 load-bearing plate, 32 front door frame, 33 door bridge front plate, 34 door bridge rear plate, 35 front support plate, 36 suspension, 4 rear force distribution frame, 41 mounting frame, 42 axle roller, 43 wheel plate, 44 axle front plate, 45 axle rear plate, 46 rear door frame, 47 rear support plate, 5 screw nut mechanism, 51 a pair of screws, 52 sleeves, 53 locking nuts, 54 rod pins, 55 limit blocks, 6 anti-rollover mechanism, 61 second connecting plate, 62 first connecting plate, 63 anti-rollover wheel, 64 sealing plate, 65 anti-rollover fixing plate, 7 hydraulic press, 8 forklift drive axle, 81 a pair of door frame supports, 82 a pair of frame supports, 83 a pair of wheel supports. DETAILED DESCRIPTION

[0043] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0044] See Figure 1 A forklift drive axle test fixture comprises a square base 1, a pair of horizontal brackets 2 are arranged in the width direction of the square base 1, and a front force distribution frame 3 and a rear force distribution frame 4 are arranged in the length direction of the square base 1 between the pair of horizontal brackets 2;

[0045] See Figure 2 Each horizontal bracket includes a wheel bridge tube 21, and the wheel bridge tube 21 is installed on the square base 1 through a bridge tube base, and the axial direction of the wheel bridge tube 21 is parallel to the width direction of the square base 1;

[0046] The bridge tube base includes an upper distance adjusting frame 22, a T-shaped lower distance adjusting frame 23 and a square distance adjusting plate 25.

[0047] The distance adjusting plate 25 is provided with a long groove in the width direction and a plurality of waist-shaped holes in the length direction. The distance adjusting plate 25 is fixedly mounted on the square base 1 through the cooperation between the bolts and the waist-shaped holes on the distance adjusting plate 25, and the distance adjusting plate 25 and the square base 1 have the same length extension direction.

[0048] A pair of lower rollers 24 are provided on both sides of the vertical part of the lower distance adjusting frame 23 through a rotating shaft, and the bottom end of the vertical part of the lower distance adjusting frame 23 is inserted into the long groove and is rolled and installed by the pair of lower rollers 24. The distance between the pair of wheel bridge tubes 21 of the pair of horizontal brackets 2 is adjusted to simulate the actual wheel spacing between two forklift wheels, and the wheel spacing is 1260mm.

[0049] See Figure 3 The front force distribution frame 3 includes a front door frame 32, the opening direction of the front door frame 32 is parallel to the width direction of the square base 1; a suspension 36 is provided at the lower part of the front door frame 32, the suspension 36 is cantilevered toward the end of the square base 1, and a load-bearing plate 31 is provided on the cantilevered end of the suspension 36;

[0050] A pair of upright door bridge plates are correspondingly provided at the bottom of the front door frame 32, and the extension direction of the door bridge plates is opposite to the overhang direction of the suspension frame 36, and a pair of door frame mounting holes are correspondingly opened on the extended ends of the pair of door bridge plates;

[0051] The suspension 36 includes a pair of inverted triangle horizontal brackets, and the upper ends of the bottoms of a pair of triangles on the pair of horizontal brackets are fixed to the front door frame 32 through a horizontal upper mounting plate, and the lower ends of the bottoms of a pair of triangles are fixed to the front door frame 32 through a horizontal lower mounting plate, and a vertical support plate is arranged between the two sides of each triangle;

[0052] The pair of upper side plates of the pair of triangles are provided with waist-shaped holes, and the waist-shaped holes are provided along the length direction of the corresponding upper side plates. The two ends of the load-bearing plate 31 are locked on the pair of upper side plates by bolts, and the horizontal distance between the load-bearing plate 31 and the front mast 32 is adjusted by adjusting the locking position of the bolts on the waist-shaped holes. The distance between the axis of the forklift drive axle 8 and the front of the vertical section of the fork is the front overhang, and the distance between the front of the vertical section of the fork and the center of gravity of the cargo is the load center distance. The simulation makes the load center distance and the front overhang 1265mm.

[0053] Each of the gate bridge plates includes a gate bridge front plate 33 and a gate bridge rear plate 34. One end of the gate bridge front plate 33 is fixed to the bottom of the front door frame 32 by bolts and the horizontal waist-shaped holes at the bottom of the front door frame 32. The other end of the gate bridge front plate 33 is provided with a first semicircular slot hole, and one end of the gate bridge rear plate 34 is provided with a second semicircular slot hole. The gate bridge front plate 33 and the gate bridge rear plate 34 are fixed by bolts so that the first semicircular slot hole and the second semicircular slot hole are matched to form a gate bridge mounting hole.

[0054] By adjusting the bolts and the fixing position of the horizontal waist-shaped hole at the bottom of the front door frame 32, the length of the door bridge plate extending out of the bottom of the front door frame 32 can be adjusted so that the door bridge mounting hole and the wheel bridge tube 21 are coaxially arranged;

[0055] See Figure 4 The rear force distribution frame 4 includes a rear door frame 46, the opening direction of the rear door frame 46 is parallel to the width direction of the square base 1, and the rear door frame 46 is uprightly fixed on the square base 1 through the mounting frame 41 at the bottom;

[0056] A pair of vehicle bridge plates are movably provided on the vertical parts on both sides of the rear door frame 46, and the vehicle bridge plates extend toward the door bridge plates, and a pair of vehicle frame mounting holes are correspondingly provided on the extended ends of the pair of vehicle bridge plates;

[0057] Each of the axle plates comprises an axle front plate 44, an axle rear plate 45 and a wheel plate 43 connected in sequence, an axle roller 42 is mounted on one end of the wheel plate 43, the vertical parts on both sides of the rear door frame 46 are vertically arranged channel steels, the axle roller 42 is movably arranged in the channel steels, so that the corresponding end of the wheel plate 43 is movably connected to the vertical part of the rear door frame 46, the other end of the wheel plate 43 is fixedly mounted on one end of the axle front plate 44 by bolts and the horizontal waist-shaped holes of the axle front plate 44, the other end of the axle front plate 44 is provided with a third semicircular slot hole, and one end of the axle rear plate 45 is provided with a fourth semicircular slot hole, the axle front plate 44 and the axle rear plate 45 are locked and fixed by bolts, so that the third semicircular slot hole and the fourth semicircular slot hole are matched to form an axle mounting hole;

[0058] By adjusting the bolts and the fixing positions of the horizontal waist-shaped holes of the front axle plate 44 , the length of the front axle plate 44 extending out of the rear door frame 46 can be adjusted so that the axle mounting hole and the wheel bridge tube 21 are coaxially arranged.

[0059] The mounting frame 41 is a square welded part, and waist-shaped holes are respectively opened on the square side plates, each waist-shaped hole is opened along the corresponding side plate, and the mounting frame 41 is fixed to the square base 1 by the cooperation of bolts and waist-shaped holes; the bottom end of the rear door frame 46 is fixed on one side of the square welded part, and the upper end of the rear door frame 46 is fixed by a pair of diagonal braces, and the lower ends of the pair of diagonal braces are fixed on the other side of the square welded part.

[0060] See Figure 5 , and also includes a pair of screw nut mechanisms, the axial ends of each screw nut mechanism 5 are rotatably mounted on the front door frame 32 and the rear door frame 46, and the axial length of each screw nut mechanism 5 is adjusted so that the front door frame 32 is vertically arranged above the square base 1;

[0061] Each of the screw-nut mechanisms 5 comprises a coaxially arranged sleeve 52 with an internal thread and a pair of screws 51, wherein the pair of screws 51 are respectively inserted at the front and rear ends of the sleeve 52 and are locked and fixed by a locking nut 53;

[0062] The screw rod cantilever end corresponding to the front end of each sleeve 52 is rotatably mounted on the front door frame 32 through the front support plate 35, and the screw rod cantilever end corresponding to the rear end of the sleeve 52 is rotatably mounted on the rear door frame 46 through the rear support plate 47, so that the front end of each sleeve 52 is higher than the rear end of the sleeve 52.

[0063] The rear support plate 47 is horizontally fixed between the openings of the rear door frame 46. A pair of rear support ears are provided at the lower end of the rear support plate 47. U-shaped plates are fixed at both ends of each screw rod.

[0064] Each rear support ear is engaged between the openings of the corresponding U-shaped plate and fixed by a rod pin 54, so that the rear end of the sleeve 52 is rotatably mounted on the rear support plate 47;

[0065] A limiting groove is provided on the outer wall of each rod pin shaft 54 ​​, one side of the limiting block 55 is correspondingly clamped in the limiting groove, and the other side of the limiting block 55 is fixed to the corresponding U-shaped plate, so as to limit the axial movement of the rod pin shaft 54 ​​.

[0066] The front support plate 35 is horizontally arranged between the openings of the front door frame 32, and a pair of front support ears are provided at the upper end of the front support plate 35, each front support ear is engaged between the openings of the corresponding U-shaped plate and fixed by a rod pin 54, so that the front end of the sleeve 52 is rotatably mounted on the front support plate 35;

[0067] Vertical plates are fixed at both ends of the front support plate 35, and horizontal waist-shaped holes are opened at the upper and lower ends of each vertical plate. Vertical waist-shaped holes are correspondingly opened on the vertical parts on both sides of the front door frame 32. By adjusting the bolt locking positions of the horizontal waist-shaped holes and the corresponding vertical waist-shaped holes, the fixed height of the front support plate 35 on the front door frame 32 is adjusted, and the axial inclination of the screw nut mechanism 5 is adjusted to test the installation angle of the simulated hydraulic cylinder on the forklift, and the axial inclination of the screw nut mechanism 5 is 20 degrees.

[0068] See Figure 6 The test fixture further includes an anti-tilt mechanism 6, which includes a circular box sealing plate 64, a pair of connecting plates and an anti-tilt fixing plate 65 vertically fixed on the square base 1;

[0069] The sealing plate 64 and the box flange 84 of the forklift drive axle are fixedly connected by bolts, and a pair of connecting plates are arranged horizontally and correspond to the radial ends of the sealing plate 64. One end of each connecting plate corresponding to the sealing plate 64 is U-shaped, and an anti-rollover wheel 63 is installed between the openings of the U-shape through a rotating shaft, and the other end of each connecting plate is fixed on the anti-rollover fixing plate 65.

[0070] Each of the connecting plates includes a first connecting plate 62 and a second connecting plate 61 arranged in the same direction. One end of the first connecting plate 62 is U-shaped, and the other end of the first connecting plate 62 and the corresponding end of the second connecting plate 61 are locked and fixed through waist-shaped holes and bolts, and the other end of the second connecting plate 61 is bolted to the anti-turnover fixing plate 65.

[0071] See Figure 7 When working, a pair of gantry supports 81 of the forklift drive axle 8 and a pair of gantry mounting holes are installed correspondingly, a pair of frame supports 82 of the forklift drive axle 8 and a pair of frame mounting holes are installed correspondingly, a pair of wheel supports 83 of the forklift drive axle 8 and a pair of wheel bridge tubes on a pair of horizontal brackets 2 are inserted correspondingly, and the hydraulic press 7 applies vertical force to the test fixture through the load-bearing plate 31 to simulate the actual stress condition of the forklift drive axle 8.

[0072] A pair of horizontal supports 2 are used to simulate left and right wheels respectively, a front force distribution frame 3 is used to simulate a gantry, a rear force distribution frame 4 is used to simulate a vehicle frame, a screw nut mechanism 5 is used to simulate a hydraulic cylinder between the vehicle frame and the gantry, and a positive pressure of a hydraulic press 7 is equivalent to a cargo load.

[0073] The test fixture can simulate and reproduce the complex force conditions on the forklift drive axle 8 when the forklift is working under load, and has a simple structure and strong maintainability, and can also be applied to forklift drive axles 8 of various tonnages and models.

[0074] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A forklift drive axle test fixture, characterized by: It comprises a square base (1), a pair of horizontal brackets (2) are arranged in a corresponding manner in the width direction of the square base (1), and a front force distribution bracket (3) and a rear force distribution bracket (4) are arranged in a corresponding length direction of the square base (1) between the pair of horizontal brackets (2); Each horizontal bracket comprises a wheel bridge cylinder (21), the wheel bridge cylinder (21) being mounted on the square base (1) via a bridge cylinder base, and the axial direction of the wheel bridge cylinder (21) is parallel to the width direction of the square base (1); The front force distribution frame (3) comprises a front door frame (32), the opening direction of the front door frame (32) is parallel to the width direction of the square base (1); a suspension frame (36) is provided at the lower part of the front door frame (32), the suspension frame (36) is cantilevered toward the end of the square base (1), and a load-bearing plate (31) is provided on the cantilevered end of the suspension frame (36); A pair of upright door bridge plates are correspondingly provided at the bottom of the front door frame (32), and the extension direction of the door bridge plates is opposite to the overhang direction of the suspension frame (36), and a pair of door frame mounting holes are correspondingly opened on the extended ends of the pair of door bridge plates; The rear force distribution frame (4) comprises a rear door frame (46), the opening direction of the rear door frame (46) is parallel to the width direction of the square base (1), and the rear door frame (46) is upright fixed on the square base (1) through a mounting frame (41) at the bottom end; A pair of vehicle bridge plates are movably provided on the vertical parts on both sides of the rear door frame (46), the vehicle bridge plates extend in the direction of the door bridge plates, and a pair of vehicle frame mounting holes are correspondingly provided on the extended ends of the pair of vehicle bridge plates; It also includes a pair of screw-nut mechanisms, wherein the axial ends of each screw-nut mechanism (5) are rotatably mounted on the front door frame (32) and the rear door frame (46), and the axial length of each screw-nut mechanism (5) is adjusted so that the front door frame (32) is vertically arranged above the square base (1); each of the screw-nut mechanisms (5) includes a coaxially arranged sleeve (52) with an internal thread and a pair of screws (51), wherein the pair of screws (51) are respectively inserted into the front and rear ends of the sleeve (52) and are locked and fixed by a locking nut (53); The screw rod overhang end corresponding to the front end of each sleeve (52) is rotatably mounted on the front door frame (32) via a front support plate (35), and the screw rod overhang end corresponding to the rear end of the sleeve (52) is rotatably mounted on the rear door frame (46) via a rear support plate (47), so that the front end of each sleeve (52) is higher than the rear end of the sleeve (52); The suspension (36) comprises a pair of inverted triangle-shaped horizontal brackets, wherein the upper ends of the bottoms of a pair of triangles on the pair of horizontal brackets are fixed to the front door frame (32) via a horizontal upper mounting plate, and the lower ends of the bottoms of the pair of triangles are fixed to the front door frame (32) via a horizontal lower mounting plate, and a vertical support plate is arranged between the two sides of each triangle; The pair of upper side plates of the pair of triangles are each provided with a waist-shaped hole, and the waist-shaped hole is opened along the length direction of the corresponding upper side plate, the two ends of the load-bearing plate (31) are locked on the pair of upper side plates by bolts, and the horizontal distance between the load-bearing plate (31) and the front door frame (32) is adjusted by adjusting the locking position of the bolts on the waist-shaped hole; When working, a pair of gantry supports (81) and a pair of gantry mounting holes of the forklift drive axle (8) are installed correspondingly, a pair of frame supports (82) and a pair of frame mounting holes of the forklift drive axle (8) are installed correspondingly, a pair of wheel supports (83) of the forklift drive axle (8) and a pair of wheel axle tubes on a pair of horizontal brackets (2) are inserted correspondingly, and the hydraulic press (7) applies a vertical force to the test fixture through the load-bearing plate (31) to simulate the actual force condition of the forklift drive axle (8).

2. The forklift drive axle test fixture according to claim 1, characterized in that: The rear support plate (47) is horizontally fixed between the openings of the rear door frame (46), and a pair of rear support ears are provided at the lower end of the rear support plate (47). Both ends of each screw rod are fixed with a U-shaped plate. Each rear support ear is engaged between the openings of the corresponding U-shaped plate and is fixed by a rod pin (54), so that the rear end of the sleeve (52) is rotatably mounted on the rear support plate (47); The front support plate (35) is horizontally arranged between the openings of the front door frame (32), and a pair of front support ears are provided at the upper end of the front support plate (35), each front support ear is engaged between the openings of the corresponding U-shaped plate and is fixed by a rod pin (54), so that the front end of the sleeve (52) is rotatably mounted on the front support plate (35); Vertical plates are fixed at both ends of the front support plate (35), and horizontal waist-shaped holes are opened at the upper and lower ends of each vertical plate. Vertical waist-shaped holes are correspondingly opened on the vertical parts of both sides of the front door frame (32). By adjusting the bolt locking positions of the horizontal waist-shaped holes and the corresponding vertical waist-shaped holes, adjusting the fixing height of the front support plate (35) on the front door frame (32), and adjusting the axial inclination of the screw nut mechanism (5), the installation angle of the hydraulic cylinder on the forklift is tested and simulated.

3. The forklift drive axle test fixture according to claim 1, characterized in that: Each of the door bridge plates comprises a door bridge front plate (33) and a door bridge rear plate (34); one end of the door bridge front plate (33) is fixed to the bottom of the front door frame (32) by means of bolts and the cooperation of the horizontal waist-shaped hole at the bottom of the front door frame (32); the other end of the door bridge front plate (33) is provided with a first semicircular slot hole; one end of the door bridge rear plate (34) is provided with a second semicircular slot hole; the door bridge front plate (33) and the door bridge rear plate (34) are locked and fixed by means of bolts, so that the first semicircular slot hole and the second semicircular slot hole are matched to form a door bridge mounting hole.

4. The forklift drive axle test fixture according to claim 1, characterized in that: Each of the axle plates comprises an axle front plate (44), an axle rear plate (45) and a wheel plate (43) connected in sequence, an axle roller (42) being mounted on one end of the wheel plate (43), both sides of the vertical portions of the rear door frame (46) being vertically arranged channel steels, the axle rollers (42) being movably arranged in the channel steels, so that the corresponding end of the wheel plate (43) and the vertical portion of the rear door frame (46) are movably connected, the other end of the wheel plate (43) being fixedly mounted on one end of the axle front plate (44) by bolts and the horizontal waist-shaped holes of the axle front plate (44), the other end of the axle front plate (44) being provided with a third semicircular slot hole, the end of the axle rear plate (45) being provided with a fourth semicircular slot hole, the axle front plate (44) and the axle rear plate (45) being locked and fixed by bolts, so that the third semicircular slot hole and the fourth semicircular slot hole are matched to form an axle mounting hole.

5. The forklift drive axle test fixture according to claim 1, characterized in that: The mounting frame (41) is a square welded component, and waist-shaped holes are respectively provided on the square side plates, each waist-shaped hole is opened along the corresponding side plate, and the mounting frame (41) is fixed to the square base (1) by the cooperation of bolts and waist-shaped holes; the bottom end of the rear door frame (46) is fixed to one side of the square welded component, and the upper end of the rear door frame (46) is fixed by a pair of diagonal braces, and the lower ends of the pair of diagonal braces are fixed to the other side of the square welded component.

6. The forklift drive axle test fixture according to claim 1, characterized in that: The bridge tube base comprises an upper distance adjusting frame (22), a T-shaped lower distance adjusting frame (23) and a square distance adjusting plate (25); the distance adjusting plate (25) is provided with a long groove in the width direction and a plurality of waist-shaped holes in the length direction; the distance adjusting plate (25) is fixedly mounted on the square base (1) by means of bolts and the waist-shaped holes on the distance adjusting plate (25); and the distance adjusting plate (25) and the square base (1) have the same length extension direction; A pair of lower rollers (24) are provided on both sides of the vertical portion of the lower distance adjusting frame (23) via a rotating shaft, and the bottom end of the vertical portion of the lower distance adjusting frame (23) is inserted into the long groove and is rollingly installed via the pair of lower rollers (24).

7. The forklift drive axle test fixture according to claim 1, characterized in that: The test fixture further comprises an anti-tilt mechanism (6), the anti-tilt mechanism (6) comprising a circular box sealing plate (64), a pair of connecting plates and an anti-tilt fixing plate (65) vertically fixed on the square base (1); The box sealing plate (64) and the box flange (84) of the forklift driving axle are fixedly connected by bolts, a pair of connecting plates are arranged horizontally and correspond to the two radial ends of the box sealing plate (64), one end of each connecting plate corresponding to the box sealing plate (64) is U-shaped, an anti-rollover wheel (63) is installed between the openings of the U-shape via a rotating shaft, and the other end of each connecting plate is fixed to the anti-rollover fixing plate (65).

8. The forklift drive axle test fixture according to claim 7, characterized in that: Each of the connecting plates comprises a first connecting plate (62) and a second connecting plate (61) arranged in the same direction, one end of the first connecting plate (62) is U-shaped, the other end of the first connecting plate (62) and the corresponding end of the second connecting plate (61) are locked and fixed through waist-shaped holes and bolts, and the other end of the second connecting plate (61) is bolted to the anti-turnover fixing plate (65).

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