Industrial vehicle steering wheel test device and method of testing

Abstract

The application discloses an industrial vehicle steering wheel testing device and a testing method thereof, which comprises a rack, the rack is formed with a mounting surface, and further comprises: a plurality of bases arranged in a straight line, the bases are used for mounting a steering wheel and a switch handle; and a dialing mechanism, the dialing mechanism comprises a first dialing rod and a second dialing rod, the first dialing rod can make linear motion to dial the switch handle to simulate an actual use condition, and the second dialing rod can make linear motion to dial the steering wheel to rotate and simulate that the steering wheel drives the switch handle to return. The application converts rotary motion into linear motion, a same set of mechanism can affect multiple samples to simultaneously perform testing, the number of driving device operation times, the number of switch on-off times and the number of handle and support contact times are recorded, and the durability of the switch handle and the durability of an automatic return function are easily obtained.

Description

Technical Field

[0001] This invention relates to the field of automotive mechanical testing technology, and in particular to a testing device and method for an industrial vehicle steering wheel. Background Technology

[0002] With the development of the forklift industry, the technology used in forklifts is gradually approaching that of automobiles. Therefore, the emergence of turn signal switches with automatic return function on forklifts is an inevitable trend. The emergence of new turn signal switches means a large demand for testing. However, existing forklift turn signal switch test benches only have the function of shifting gears and do not have a steering wheel operation part, making them unsuitable for testing new turn signal switches. Existing automotive test benches generally have two rotating mechanisms arranged vertically, which is complex in structure and can only test one sample at a time, resulting in low efficiency. Therefore, based on this situation, it is necessary to design an industrial vehicle steering wheel testing device and its testing method. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an industrial vehicle steering wheel testing device and its testing method.

[0004] The technical problem solved by this invention is achieved through the following technical solution:

[0005] An industrial vehicle steering wheel testing device and its testing method include a test bench with a mounting surface, and further include: a plurality of bases arranged in a straight line for mounting a steering wheel and a switch handle; a toggle mechanism including a first lever and a second lever, the first lever being capable of linear motion to actuate the switch handle to simulate actual use, and the second lever being capable of linear motion to rotate the steering wheel to simulate the steering wheel returning to its original position; and a drive mechanism including a motor, the output end of which is connected to the first lever and the second lever to drive the first lever and the second lever to perform linear motion respectively.

[0006] Preferably, the linearly arranged base axis is parallel to the motion axis of the first lever and the second lever.

[0007] Preferably, the toggle mechanism includes a first slider for mounting a first lever and a second slider for mounting a second lever. The drive mechanism further includes a lead screw and an auxiliary rod. The lead screw is connected to the first slider and the second slider to drive the first slider and the second slider to move. The auxiliary rod is slidably connected to the first slider and the second slider.

[0008] Preferably, the first lever and the second lever are arranged in pairs, and a pair of first levers and the first and second levers form a group. The distance between the pairs of first levers is 100-150mm, and the distance between the pairs of second levers is 1.5-3 times the distance between the pairs of first levers.

[0009] Preferably, the pair of first levers can rotate the steering wheel by ±43°.

[0010] Preferably, it further includes a controller, a first counter, a second counter, a third counter, and a fourth counter. The first counter and the controller are connected to the drive mechanism to record the number of times the drive mechanism operates. The second counter is connected to the switch handle to record the number of times the switch handle is turned on. The third counter and the fourth counter are respectively connected to the opposite ends of the moving part of the switch handle to record the number of times the first lever contacts the opposite side of the switch handle.

[0011] Preferably, the base is rotatably connected to a positioning shaft, and the base is provided with an array of mounting holes.

[0012] A test method for an industrial vehicle steering wheel testing device, wherein, according to the aforementioned industrial vehicle steering wheel testing device, the first slider and the second slider move a switch handle to three states within one motion cycle. Within one cycle, the number of drive operation times a, the number of times the switch handle is engaged b, the number of times the first side of the movable part of the switch handle contacts the first lever c, and the number of times the second side of the movable part of the switch handle contacts the first lever d are recorded. Comparison of a and b yields the number of times the switch handle is activated. Comparison of a, b, and d determines whether there are any instances of return failure.

[0013] Preferably, the average position of a pair of first levers within one cycle is defined as right 1-right 13, and the average position of a pair of second levers within one cycle is defined as left 1-left 10. The switch handle is located in the middle position of a pair of first levers. A pair of first levers moves synchronously in a cycle with a position difference of 6 and a pair of second levers moves synchronously with a position difference of 3 to obtain the values ​​of a, b, c, and d.

[0014] The advantages and positive effects of this invention are:

[0015] 1. This invention transforms the rotational motion in traditional testing devices into linear motion. The same mechanism can influence multiple samples to be tested simultaneously. Compared with traditional rotational motion, linear motion has higher stability and accuracy, and is more conducive to collecting various data. By recording the number of times the drive mechanism runs, the number of times the switch is turned on, and the number of times the handle contacts the bracket, this invention can easily determine the durability of the switch handle and the durability of the automatic return function.

[0016] 2. Compared with existing testing devices, the present invention has a simpler structure, which greatly reduces production costs. On the other hand, it also reduces maintenance costs and makes it easier for staff to operate. By moving the first lever and the second lever in parallel and parallel to the arrangement direction of the base, and in conjunction with the corresponding testing methods, it is conducive to orderly testing, thereby greatly improving work efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the axle-view structure of the present invention after the steering wheel is assembled;

[0018] Figure 2 In this invention Figure 1 Top view;

[0019] Figure 3 This is a schematic diagram of the isometric structure of the present invention;

[0020] Figure 4 This is a cross-sectional view of the steering wheel and switch handle in this invention;

[0021] Figure 5 This is an isometric structural diagram of the switch handle in this invention;

[0022] Figure 6 This is a diagram showing the positions of the first and second levers in the initial state of this invention;

[0023] Figure 7 This is a diagram showing the positions of the first and second levers in the first second of this invention;

[0024] Figure 8 This is a diagram showing the positions of the first and second levers at the 2nd second in this invention;

[0025] Figure 9 This is a diagram showing the positions of the first and second levers at the 3rd second in this invention;

[0026] Figure 10 This is a diagram showing the positions of the first and second levers at the 4th second in this invention;

[0027] Figure 11 This is a diagram showing the positions of the first and second levers at the 5th second in this invention;

[0028] Figure 12 This is a diagram showing the positions of the first and second levers at the 6th second in this invention;

[0029] Figure 13 This is a diagram showing the positions of the first and second levers at the 7th second in this invention;

[0030] Figure 14 This is a diagram showing the positions of the first and second levers at the 8th second in this invention;

[0031] Figure 15 This is a diagram showing the positions of the first and second levers at the 9th second in this invention;

[0032] Figure 16 This is a diagram showing the positions of the first and second levers at the 10th second in this invention.

[0033] Figure 17 This is a diagram showing the positions of the first and second levers at the 11th second in this invention.

[0034] Figure 18 This is a diagram showing the positions of the first and second levers at the 12th second in this invention.

[0035] In the diagram: 100, stand; 200, steering wheel; 300, switch handle; 301, housing; 302, rotating body; 303, rotating handle; 304, turn signal shaft; 305, return block; 306, first protrusion; 307, adjusting protrusion; 308, arc groove; 400, toggle mechanism; 401, first lever; 402, second lever; 403, first slider; 404, second slider; 500, drive mechanism; 501, motor; 502, lead screw; 503, auxiliary rod; 600, base; 601, positioning shaft; 602, extension plate; 603, stabilizing plate. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0039] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0040] An industrial vehicle steering wheel testing device of the present invention includes a stand 100 having a mounting surface, and further includes: a plurality of bases arranged in a straight line for mounting a steering wheel 200 and a switch handle 300; a toggle mechanism 400 including a first lever 401 and a second lever 402, the first lever 401 being capable of linear motion to move the switch handle 300 to simulate actual use, and the second lever 402 being capable of linear motion to rotate the steering wheel 200 to simulate the steering wheel 200 and cause the switch handle 300 to return to its original position; and a drive mechanism 500 including a motor 501, the output end of which is connected to the first lever 401 and the second lever 402 to drive the first lever 401 and the second lever 402 to perform linear motion respectively.

[0041] Specifically, such as Figure 1 As shown, the experimental apparatus includes a platform 100. The upper side of the platform 100 is a plane, which is used to install components such as the base. Unlike some existing testing equipment, this mounting surface is a horizontal plane, thus providing a stable testing plane for the testing process. The lower side of the platform 100 is an openable cabinet with a certain space inside and several holes on one side. In some embodiments, transparent components, such as tempered glass, can also be used, allowing the interior of the cabinet to be seen directly from the outside.

[0042] like Figure 2 As shown, three bases are evenly spaced in a straight line along the left and right sides of the test stand 100. The center-to-center distance between the bases is 350mm. This installation distance is determined based on the diameter of the steering wheel 200 to be tested, ensuring that the steering wheels 200 on adjacent bases do not interfere with each other. Figure 3 As shown, the base is not directly mounted on the mounting surface of the test bench 100. The base has a symmetrical trapezoidal structure with an extension plate on each of the left and right sides and a hollow structure in the middle. It should be noted that a stabilizing plate is connected between the lower side of the extension plate of the trapezoidal structure and the mounting surface of the test bench 100. Two bolts are provided on each side of the extension plate. The bolts pass through the stabilizing plate and are connected to the test bench 100. The stabilizing plate fixes the trapezoidal structure, which can greatly increase the stability of the structure and make the test of the steering wheel 200 more accurate.

[0043] The base is rotatably connected to a positioning shaft 601, and the base has an array of mounting holes. Specifically, as shown... Figure 3 As shown, a through-hole is provided at the center of the base. One end of the positioning shaft 601 is installed in the positioning shaft 601, and the other end is vertically upward, detachably connected to the steering wheel 200 and the switch handle 300. Figure 3 In the middle, the bases on the left and right sides are shown without the positioning shaft 601 installed. The bases are also provided with mounting holes, which are used to cooperate with the steering wheel 200 to fix the steering wheel 200.

[0044] Specifically, such as Figure 1 As shown, each base has two first levers 401 on its left side. The first levers 401 are vertical rods, and the two first levers 401 are located on both sides of the switch handle 300. Each first lever 401 moves in a straight line to touch the switch handle 300, so that the switch handle 300 can turn left or right. Each base has two second levers 402 on its right side. The second levers 402 include a vertical support rod and a horizontal rod. The horizontal rod has a certain length. The two second levers 402 are 3-20mm away from the upper surface of the steering wheel 200. The two second levers 402 are located on both sides of the upper handle of the steering wheel 200. The second levers 402 move in a straight line to act on the handle of the steering wheel 200, causing the steering wheel 200 to rotate, thereby realizing the automatic reset of the switch handle 300. It should be noted that the six first levers 401 corresponding to the three bases move in the same straight line, and the six corresponding second levers 402 move in the same straight line.

[0045] The toggle mechanism 400 includes a first slider 403 for mounting a first lever 401 and a second slider 404 for mounting a second lever 402. The drive mechanism 500 further includes a lead screw 502 and an auxiliary rod 503. The lead screw 502 is connected to the first slider 403 and the second slider 404 to drive the first slider 403 and the second slider 404 to move. The auxiliary rod 503 is slidably connected to the first slider 403 and the second slider 404. The first lever 401 and the second lever 402 are respectively arranged in pairs, and a pair of first levers 401 and the first and second levers 402 form a group. The distance between the pairs of first levers 401 is 100-150mm, and the distance between the pairs of second levers 402 is 1.5-3 times the distance between the pairs of first levers 401.

[0046] like Figure 1As shown, the drive mechanism 500 includes two motors 501 (left and right), each motor 501 connected to a lead screw 502. The lead screw 502 is connected to a first slider 403 / second slider 404. An auxiliary rod 503 is arranged parallel to the lead screw 502. More specifically, there are two lead screws 502 and two auxiliary rods 503. The lead screw 502 drives the first lever 401 and the second lever 404 to perform linear motion. Each first lead screw 502 corresponds to one first slider 403, and the distance between the first lead screws 502 is 240mm. The distance between slider 404 and second lead screw 502 is specifically 120mm. In some embodiments, each pair of two first levers 401 shares one first slider 403, and each pair of two second levers 402 shares one second slider 404. Preferably, each first lead screw 502 and each second lead screw 502 corresponds to one first slider 403 and one second slider 404. This method makes it easier to move the first slider 403 and the second slider 404, and makes it easier to determine the stability of the position of the first lead screw 502 and the second lead screw 502 in different states.

[0047] The linearly arranged base axes are parallel to the movement axes of the first lever 401 and the second lever 402. Specifically, for example... Figure 2 As shown, the three bases are arranged in a straight line in the left-right direction, the six first levers 401 are arranged in a straight line in the left-right direction, and the six second levers 402 are arranged in a straight line in the left-right direction. Multiple first levers 401 are driven by the same motor 501, and multiple second levers 402 are driven by the same motor 501. It should be noted that the straight lines of movement of the first levers 401 and the second levers 402 are parallel to the straight lines of the base arrangement. With the corresponding testing methods, it is conducive to orderly testing, thereby greatly improving work efficiency.

[0048] The pair of first levers 401 can rotate the steering wheel 200 by ±43°, and the pair of second levers 402 can rotate the switch handle 300 by ±18°.

[0049] It also includes a controller, a first counter, a second counter, a third counter, and a fourth counter, which are interconnected. The controller and the first counter are connected to the drive mechanism 500. The first counter records the number of times the drive mechanism 500 operates. The second counter is connected to the switch handle 300 and records the number of times the switch handle 300 is turned on. The number of times the switch handle 300 is turned on includes left turn sensing, right turn sensing, and return sensing. The third counter and the fourth counter are respectively connected to the left and right sides of the rotating handle 300. The first lever pushes the rotating handle 303 to the right from the left side to turn on the switch handle 300. The third counter records the number of times the switch handle 300 is turned on. The first lever pushes the rotating handle 303 to the left from the right side to turn on the switch handle 300. The fourth counter records the number of times the switch handle 300 is turned on. The controller is located inside the platform 100. Copper wire is wound around the rotating handle 303 of the switch handle 300. The first lever 401 and the second lever 402 are both metal rods.

[0050] like Figure 4 and Figure 5 As shown in the figure, the mechanism of the steering wheel 200 and the switch handle 300 is as follows. Figure 4 The system includes a housing 301, with a rotating body 302 rotatably connected to the middle of the housing 301. The rotating body 302 has vertical ribs and is coaxial with the positioning shaft 601. A rotating handle 303 is rotatably connected to the housing 301, and one end of the rotating handle 303 is connected to a turn signal shaft 304. The turn signal shaft 304 is rotatably connected to the housing 301. A return block 305 is also connected inside the housing 301. A groove is formed inside the housing 301, and the upper side of the return block 305 is a first protrusion 306. The first protrusion 306 can move and rotate within this groove. Figure 5As shown, adjustment protrusions 307 are formed on both the left and right sides of the turn signal shaft 304. The return block 305 is connected to a spring to maintain its position. In addition, an arc-shaped groove 308 is formed on the upper side of the turn signal shaft 304. The lower side of the return block 305 has a second protrusion, which abuts against the arc-shaped surface of the arc-shaped groove 308. In use, rotating the aforementioned rotating handle 303 drives the turn signal shaft 304 to rotate. The arc-shaped groove 308, in conjunction with the adjustment protrusions 307 on both sides, causes the return block 305 to rotate while moving to the right, thereby driving the right end of the return block 305 to approach the rotating body 302. The arc-shaped groove 308 has a structure with a central protrusion and the lower protrusion located at the arc. When the handle is in the initial state with the central protrusion of the groove 308, after it is rotated, the lower protrusion moves towards the rotating body 302 under the action of the groove 308. After moving, it maintains its original position under the action of the spring and the groove 308. When the steering wheel 200 rotates and drives the rotating body 302 to rotate, the rib of the rotating body 302 contacts the return block 305, thereby causing the return block 305 to return to its original position. When it is in its original position, the rotating body 302 does not contact the return block 305 when it rotates. In this test device, the first lever 401 and the second lever 402 respectively replace the manual operation of the handle or the rotation of the steering wheel 200 to simulate the real situation.

[0051] A test method for an industrial vehicle steering wheel testing device, according to a steering wheel testing device, a first slider and a second slider move a switch handle to three states in one motion cycle. Within one cycle, the number of drive operation times a, the number of times the switch handle is engaged b, the number of times the first side of the movable part of the switch handle contacts the first lever c, and the number of times the second side of the movable part of the switch handle contacts the first lever d are recorded. Comparison of a and b yields the number of times the switch handle is activated. Comparison of a, b, and d determines whether there are any instances of return failure.

[0052] Within one cycle, the average position of a pair of first levers is defined as right 1-right 13, and the average position of a pair of second levers within one cycle is defined as left 1-left 10. The switch handle is located in the middle position of a pair of first levers. A pair of first levers moves synchronously in a cycle with a position difference of 6 and a pair of second levers moves synchronously with a position difference of 3 to obtain the values ​​of a, b, c, and d.

[0053] It should be noted that within a loop, a:b:c:d = 2:2:1:1. When making comparisons, a is used as the baseline. If the ratio of a to b is incorrect, but the comparison of c to d is correct, it indicates that there is a fault in the internal circuit of the turn signal switch 300. If the ratio of a to b is correct, the number of times c or d is more than 1 / 2a is the number of failures.

[0054] refer to Figures 6-18One cycle lasts 12 seconds. Every second, a pair of first levers 401 and a pair of second levers 402 are located at different positions in their coordinate system. Within 12 seconds, the first levers 401 and second levers 402 drive the steering wheel 200 and the switch handle 300 to achieve their three states. Specifically, the specific positions of the first levers 401 and second levers 402 over time, as well as the positions of various components in the steering wheel 200 structure, are shown in the following figure:

[0055]

[0056] Combining the position operation shown in the diagram above, and the data measured by the first and second counters, compare the data of a, b, and c. The second counter records the number of times the switch handle 300 contacts the first lever 401. This number should be consistent with the number of times the switch handle 300 is turned on (that is, the number of times the turn signal switch is turned on). The values ​​of b and c should be consistent. If c is greater than b, the extra part is the number of times the automatic return failed. It should be noted that the first and second counters are respectively connected to different first sliders 403 corresponding to a pair of first levers 401, so that the measured data can more intuitively show whether they fail simultaneously or one fails first.

[0057] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of protection of this invention.

Claims

1. A testing device for an industrial vehicle steering wheel, comprising a test bench (100) having a mounting surface, characterized in that: Also includes: A plurality of bases (600) are arranged in a straight line, the bases (600) being used to mount a steering wheel (200) and a switch handle (300); A toggle mechanism (400) includes a first lever (401) and a second lever (402). The first lever (401) can move linearly to toggle the switch handle (300) to simulate actual use. The second lever (402) can move linearly to toggle the steering wheel (200) to rotate the simulated steering wheel (200) and cause the switch handle (300) to return to its original position. A drive mechanism (500) includes a motor (501), the output end of which is connected to the first lever (401) and the second lever (402) to drive the first lever (401) and the second lever (402) to perform linear motion respectively. It also includes a controller, a first counter, a second counter, a third counter, and a fourth counter. The first counter and the controller are connected to the drive mechanism (500) to record the number of times the drive mechanism operates. The second counter is connected to the switch handle (300) to record the number of times the switch handle (300) is turned on. The third counter and the fourth counter are respectively connected to the opposite ends of the moving part of the switch handle (300) to record the number of times the first lever (401) contacts the opposite side of the switch handle (300). The axis of the linearly arranged base (600) is parallel to the movement axis of the first lever (401) and the second lever (402); Each base has two first levers (401) on its left side and two second levers (402) on its right side; the drive mechanism (500) includes two motors (501) on the left and right sides, with multiple first levers (401) driven by the same motor (501) and multiple second levers (402) driven by another motor (501).

2. The industrial vehicle steering wheel testing device according to claim 1, characterized in that: The toggle mechanism (400) includes a first slider (403) for mounting a first lever (401) and a second slider (404) for mounting a second lever (402). The drive mechanism (500) further includes a lead screw (502) and an auxiliary rod (503). The lead screw (502) is connected to the first slider (403) and the second slider (404) to drive the first slider (403) and the second slider (404) to move. The auxiliary rod (503) is slidably connected to the first slider (403) and the second slider (404).

3. The industrial vehicle steering wheel testing device according to claim 1 or 2, characterized in that: The first lever (401) and the second lever (402) are respectively arranged in pairs, and a pair of first levers (401) and a pair of second levers (402) form a group. The distance between the pairs of first levers (401) is 100-150mm, and the distance between the pairs of second levers (402) is 1.5-3 times the distance between the pairs of first levers (401).

4. The industrial vehicle steering wheel testing device according to claim 3, characterized in that: The pair of first levers (401) can rotate the steering wheel (200) by ±43°.

5. The industrial vehicle steering wheel testing device according to claim 1, characterized in that: The base (600) is rotatably connected to a positioning shaft (601), and the base (600) is provided with an array of mounting holes.

6. A test method for an industrial vehicle steering wheel testing device, characterized in that, According to claim 5, in an industrial vehicle steering wheel testing device, the first slider (403) and the second slider (404) move the switch handle (300) to three states in one motion cycle. In one cycle, the number of driving operations of the drive mechanism (500) a, the number of times the switch handle (300) is turned on b, the number of times the first side of the moving part of the switch handle (300) contacts the first lever (401) c, and the number of times the second side of the moving part of the switch handle (300) contacts the first lever (401) d are recorded. a and b are compared to obtain the number of times the switch handle (300) is activated. a, b, and d are compared to determine whether there are any return failures.

7. The testing method for an industrial vehicle steering wheel testing device according to claim 6, characterized in that: Within one cycle, the average position of a pair of first levers (401) is defined as right 1-right 13, and the average position of a pair of second levers (402) within one cycle is defined as left 1-left 10. The switch handle (300) is located in the middle position of a pair of first levers (401). A pair of first levers (401) move synchronously in a cycle with a position difference of 6 and a pair of second levers (402) move synchronously with a position difference of 3 to obtain the values ​​of a, b, c, and d.

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