Simulation Steering Bridge Drop Test Tooling

Abstract

The present invention discloses a simulation tooling for the drop test of a steering axle, which includes a rotating frame and a support. The support includes a support body and a shaft rotatably connected to the top end of the support body. A plurality of assembly holes are symmetrically formed in both sides of the rotating frame along its length direction. The shaft is accommodated in the assembly holes, and a fastener is provided at the connection between the support body and the shaft. A counterweight is detachably connected to the upper end surface of the side of the rotating frame away from the support, and a first mounting plate for connecting the steering axle is provided on the lower end surface. The present invention can simulate the reliability of the steering axle of a forklift when it encounters a drop situation during use. The present invention can adjust the simulated wheelbase through multiple groups of assembly holes symmetrically formed on both sides of the rotating frame, and the combined use of counterweights can simulate the load sizes of the steering axles of forklifts with different tonnages, and is applicable to forklifts with different wheelbases and different tonnages for simulated drop tests, with strong versatility.

Description

Technical Field

[0001] The present invention relates to the field of reliability tests for forklift steering axles, and specifically to a simulation test tool for the drop test of a steering axle. Background Art

[0002] During the use of a forklift, it is inevitable that its various components are subjected to impacts and vibrations, and its impact resistance is an important indicator of the reliability of the entire forklift. When the forklift drops, the steering axle is particularly vulnerable to damage. Therefore, during the development of the forklift, a drop damage test needs to be carried out. The usual method is to install the steering axle on the whole vehicle, lift the rear part of the whole vehicle to a certain height and then let it fall, and observe the damage situation of the forklift after the drop. However, the drop of the whole vehicle not only easily damages other components, but also is affected by human factors each time, resulting in great differences in the drop situation. At present, there are also some test tools dedicated to the drop test of forklift steering axles, which mainly have the following problems:

[0003] 1. The tooling is not universal, and different-sized toolings need to be used for the test of forklift steering axles with different wheelbases;

[0004] 2. The counterweight cannot be configured, and it cannot be adapted to forklifts of different tonnages for testing. Summary of the Invention

[0005] The purpose of the present invention is to provide a simulation test tool for the drop test of a steering axle to solve the problems raised in the above background art, and it can be adapted to forklifts with different wheelbases and different counterweights for drop tests.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A simulation test tool for the drop test of a steering axle includes a rotating frame and a support. The support includes a support body and a shaft rotatably connected to the top end of the support body. A plurality of assembly holes are symmetrically opened on both sides of the rotating frame along its length direction. The shaft is accommodated in the assembly holes, and a fastener is provided at the connection between the support body and the shaft; a counterweight is detachably connected to the upper end surface of the side of the rotating frame away from the support, and a first mounting plate for connecting the steering axle is provided on the lower end surface.

[0008] As a further solution of the present invention: The fastener includes a pressing member and a positioning block. Among them, a notch is opened at the top end of the support body. The pressing member and the notch enclose a accommodating space for accommodating the shaft, and the positioning block is provided at the bottom of the shaft.

[0009] As a further solution of the present invention: A second mounting plate is provided between the rotating frame and the counterweight, and a plurality of mounting holes are opened on the second mounting plate.

[0010] As a further solution of the present invention: impact mechanisms are symmetrically provided on the lower end face of the second mounting plate.

[0011] As a further solution of the present invention: a first waist-shaped hole for connecting the impact mechanism is formed on the second mounting plate, and the length direction of the first waist-shaped hole is the same as the length direction of the rotating frame.

[0012] As a further solution of the present invention: a lifting ring is provided at the end of the second mounting plate.

[0013] As a further solution of the present invention: a backing plate is detachably connected to the bottom end of the support.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The present invention can simulate the reliability of the steering bridge when a forklift encounters a falling situation during use. The present invention can adjust the simulated wheelbase through multiple groups of assembly holes symmetrically opened on both sides of the rotating frame, and can simulate the load of the steering bridge of forklifts with different tonnages through the combined use of counterweight blocks, and is applicable to forklifts with different wheelbases and different tonnages for simulated drop tests, with strong versatility.

[0016] The impact mechanism can simulate the structural members of the forklift frame and simulate the process of the structural members hitting the steering bridge body when the forklift falls. By adjusting the position of the adjusting screw in the first waist-shaped hole and the position of the adjusting bolt in different second waist-shaped holes, the position where the impact block hits the steering bridge can be accurately set, and the overall vehicle working conditions can be simulated more precisely.

[0017] A positioning pin is provided at the center of the counterweight block. When multiple counterweight blocks are accumulated, after inserting the positioning pin, some counterweight blocks are first positioned to prevent cumulative errors from occurring during the process of stacking multiple counterweight blocks, so that the pressing bolt cannot be smoothly inserted into the perforations of all counterweight blocks. Description of the Drawings

[0018] Figure 1 is the installation schematic diagram of the present invention and the steering bridge;

[0019] Figure 2 is the structural schematic diagram of the present invention (lacking counterweight blocks);

[0020] Figure 3 is Figure 2 the partial enlarged view of;

[0021] Figure 4 is the structural schematic diagram of the rotating frame and the first mounting plate in the present invention;

[0022] Figure 5 is the structural schematic diagram of the impact mechanism in the present invention;

[0023] Figure 6 is the side sectional view of the counterweight block in the present invention;

[0024] In the figure: 1 - rotating frame, 11 - assembly hole, 12 - second mounting plate, 121 - mounting hole, 122 - first elongated hole, 2 - support, 21 - support body, 22 - shaft body, 3 - fastener, 31 - pressing member, 32 - positioning stop, 4 - counterweight, 41 - pressing bolt, 42 - positioning pin, 51 - first elongated hole, 4 - counterweight, 5 - first mounting plate, 6 - steering bridge, 7 - lifting ring, 8 - backing plate, 9 - impact mechanism, 91 - support plate, 911 - second elongated hole, 92 - impact block, 93 - connecting beam, 931 - through hole, 94 - adjusting bolt. Specific embodiments

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or a communication connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] Please refer to Figures 1-5, in the embodiments of the present invention, a simulation steering axle drop test tooling includes a rotating frame 1 and a support 2. Among them, the support 2 includes a support body 21 and a shaft body 22 rotatably connected to the top end of the support body 21. A plurality of assembly holes 11 are symmetrically formed in both sides of the rotating frame 1 along its length direction. The shaft body 22 is received in the assembly holes 11, and a fastener 3 is provided at the connection between the shaft body 22 and the support body 21. The shaft body 22 is connected to the support 2 through the fastener 3, so that the rotating frame 1 rotates with the shaft body 22 as a fulcrum. A counterweight 4 is detachably connected to the upper end surface of the side of the rotating frame 1 away from the support 2, and a first mounting plate 5 for connecting a steering axle 6 is provided on the lower end surface. The support 2 can simulate the front wheels of a forklift, and the distance from the support 2 to the steering axle 6 is the simulated wheelbase. By adjusting the position of the shaft body 22 in different assembly holes 11, the size of the simulated wheelbase of the forklift can be adjusted; the counterweight 4 can simulate the rear axle load received by the steering axle 6.

[0029] Further, a second mounting plate 12 for fixing the counterweight 4 is provided between the rotating frame 1 and the counterweight 4, and the second mounting plate 12 is fixed at the end of the rotating frame 1. The number of counterweights 4 is set to be multiple and can be used in combination to simulate the loads applied to the steering axle 6 by forklifts of different tonnages. Four corners of the counterweight 4 are provided with perforations of unified specifications, and a plurality of mounting holes 121 are formed in the second mounting plate 12. The counterweight 4 can be firmly fixed on the second mounting plate 12 by passing a compression bolt 41 through the perforation and the mounting hole 121. Different mounting holes 121 can match the connections of counterweights 4 of different sizes.

[0030] Further, a positioning pin 42 is provided at the center of the counterweight 4. When multiple counterweights 4 are stacked, the positioning pin 42 is inserted to position some of the counterweights 4 first, preventing cumulative errors from occurring during the process of stacking multiple counterweights 4, so that the compression bolt 41 cannot be smoothly inserted into the perforations of all the counterweights 4.

[0031] Further, a first waist-shaped hole 122 is also formed on the end surface of the second mounting plate 12, and the first waist-shaped hole 122 is used to connect an impact mechanism 9. The impact mechanism 9 is provided between the second mounting plate 12 and the steering axle 6 and is used to simulate the structural members on the forklift frame. When the forklift drops, the working condition of the steering axle 6 being impacted by the structural members is simulated. As Figure 5 shown, the impact mechanism 9 includes a support plate 91, an impact block 92, a connecting beam 93, and an adjusting bolt 94; a plurality of mutually parallel second waist-shaped holes 911 are formed on the end surface of the support plate 91, and two connecting beams 93 are vertically connected to both ends of the support plate 91. A through hole 931 is formed at the upper end of the connecting beam 93. A screw rod passes through the through hole 931 and the first waist-shaped hole 122, and the impact mechanism 9 is fixed to the lower end surface of the second mounting plate 12 through the screw rod.

[0032] It should be specifically noted that the length directions of the first kidney-shaped hole 122, the second kidney-shaped hole 911, and the length direction of the rotating frame 1 are kept consistent, so that the impact block 92 is applicable to different simulated wheelbases. When the steering axle 6 falls, the steering axle 6 itself deforms due to the impact, and thus collides or squeezes violently with the impact block 92. By adjusting the position of the adjusting screw in the first kidney-shaped hole 122 and the position of the adjusting bolt 94 in different second kidney-shaped holes 911, the position where the impact block 92 impacts the steering axle 6 can be accurately set, and the vehicle conditions can be simulated more precisely.

[0033] Furthermore, as Figure 3 shown, the support 2 includes a support body 21 and a shaft body 22 rotatably connected to the top end of the support body 21. The shaft body 22 can rotate freely in the assembly hole 11. A semi-circular notch for accommodating the shaft body 22 is provided at the top end of the support body 21; the fastener 3 includes a pressing member 31 and a positioning stop block 32. The pressing member 31 is arc-shaped. The pressing member 31 and the semi-circular notch enclose a receiving space for accommodating the shaft body 22. The positioning stop block 32 is provided at the bottom of the shaft body 22. The contact surface between the positioning stop block 32 and the shaft body 22 is an arc surface. The positioning stop block 32 and the pressing member 31 act together to limit the rotational movement tendency of the shaft body 22 in the receiving space, ensuring that when the drop test is performed, the rotating frame 1 rotates around the shaft body 22 and the shaft body 22 itself does not rotate.

[0034] Furthermore, two lifting rings 7 are symmetrically provided at the end of the second mounting plate 12. The lifting rings 7 can be connected to the hooks of the crane, so as to lift the rotating plate 1 to a preset height.

[0035] Furthermore, a cushion plate 8 is detachably connected to the bottom end of the support 2. Since forklifts of different tonnages are equipped with tires of different diameters, after the steering axle 6 is installed, the height of the tooling from the ground is not uniform. Therefore, a cushion plate 8 is provided under the support body 1 to keep the starting position of the steering axle 6 in a horizontal position.

[0036] When performing the drop test of the present invention, first, according to the wheelbase size of the forklift to be tested, the shaft body 2 is installed in the appropriate assembly hole 11, and the shaft body 22 is fixed to the support body 21 through the fastener 3; then the steering axle 6 of the forklift to be tested is installed on the first mounting plate 5, and the cushion plate 8 is raised or lowered according to the tire height to make the starting position of the steering axle 6 in a horizontal position; according to the tonnage of the forklift to be tested, the corresponding size and number of counterweight blocks 4 are selected and combined, and the counterweight blocks 4 are fixed on the mounting holes 121 of the second mounting plate 12; according to the wheelbase size of the forklift to be tested, the position of the impact block 92 is adjusted; the crane is used to hook the lifting ring 7, the steering axle 6 is lifted to a preset height, and then the hook of the tone regulator falls off, the rotating frame 1 rotates and falls around the shaft body 22, and the steering axle 6 falls.

[0037] Although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0038] Therefore, the above description is only a preferred embodiment of the present application and is not used to limit the scope of implementation of the present application; that is, all equivalent transformations made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A simulation steering bridge drop test tooling, comprising a rotating frame (1) and a support (2), characterized in that, The support (2) includes a support body (21) and a shaft body (22) rotatably connected to the top end of the support body (21). A plurality of assembly holes (11) are symmetrically formed in both sides of the rotary frame (1) along its length direction. The shaft body (22) is received in the assembly holes (11), and a fastener (3) is provided at the connection between the support body (21) and the shaft body (22). A counterweight (4) is detachably connected to the upper end surface of the side of the rotary frame (1) away from the support (2), and a first mounting plate (5) for connecting to a steering axle (6) is provided on the lower end surface.

2. The simulation steering bridge drop test tooling according to claim 1, characterized in that, The fastener (3) includes a pressing member (31) and a positioning block (32). Among them, a notch is formed at the top end of the support body (21). The pressing member (31) and the notch enclose a receiving space for receiving the shaft body (22), and the positioning block (32) is provided at the bottom of the shaft body (22).

3. The simulation steering bridge drop test tooling according to claim 1, characterized in that, A second mounting plate (12) is provided between the rotary frame (1) and the counterweight (4), and a plurality of mounting holes (121) are formed in the second mounting plate (12).

4. The simulation steering bridge drop test tooling according to claim 3, characterized in that, Impact mechanisms (9) are symmetrically provided on the lower end surface of the second mounting plate (12).

5. The simulation steering bridge drop test tooling according to claim 4, characterized in that, A first waist-shaped hole (122) for connecting the impact mechanism (9) is formed in the second mounting plate (12), and the length direction of the first waist-shaped hole (122) is consistent with the length direction of the rotary frame (1).

6. The simulation steering bridge drop test tooling according to claim 4, characterized in that, A lifting ring (7) is provided at the end of the second mounting plate (12).

7. The simulation steering bridge drop test tooling according to claim 1, characterized in that, A backing plate (8) is detachably connected to the bottom end of the support (2).

Images