Motorcycle handlebar torque testing device and testing method

Abstract

The present invention discloses a motorcycle handlebar torque test device, comprising a first connection part, an extension column, a second connection part and a test handlebar which are fixedly connected in sequence from bottom to top; the first connection part is fixedly arranged on the top of the motorcycle upper connecting plate by bolts, the extension column is coaxial with the steering column, and a plurality of metal foil strain gauges are adhered to the side wall thereof; the plurality of strain gauges adopt a bridge circuit as their measuring circuit, and the strain gauges are externally connected to a strain test device. The present invention also discloses a test method. The present invention has a simple structure and is easy to use. When in use, the existing handlebar of the motorcycle only needs to be removed and the test device can be fixed by bolts to realize on-site measurement of the torque of the motorcycle handlebar.

Description

Technical Field

[0001] The invention relates to the field of motorcycle handlebar torque testing, and in particular to a motorcycle handlebar torque testing device and a testing method thereof. Background Art

[0002] As motorcycles become more and more popular, their safety has attracted more and more attention from consumers. CN113092140A discloses an online turning angle test device for motorcycles, which is provided with a steering test mechanism and a front wheel clamping and positioning mechanism. The two platforms are used to measure the turning angle of the handlebars through cooperation. The front wheel clamping and positioning mechanism is used to position the front wheel so that the axis of the motorcycle front wheel is coaxial with the axis of the wheel disc, and then the front wheel is clamped by a clamping cylinder to ensure that the position of the axis of the front wheel relative to the equipment remains unchanged during the test; the steering test mechanism uses an encoder to measure the turning angle range. The above structure does not directly measure the handlebars, but measures the turning angle of the wheel disc through the front wheel. The actual operation has complicated steps and low measurement accuracy.

[0003] The current measurement of motorcycle torque is to measure the steering column connected to the handlebars, and the steering column is fixedly connected between the upper connecting plate and the lower connecting plate of the motorcycle. Due to its inconvenient location, it is impossible to accurately measure the motorcycle torque. Therefore, motorcycle manufacturers are eager to find a simple and accurate detection method and equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the defects of the prior art and provide a motorcycle handlebar torque testing device and a testing method thereof. The device has a simple structure, an extension column of a motorcycle steering column is set, and two connecting parts are inserted into the extension column. At the same time, during production, the two connecting parts are positioned by inserting positioning pins into positioning holes therein to ensure the correct installation of the testing device. When in use, the existing handlebar of the motorcycle only needs to be removed and the testing device can be fixed by bolts to realize on-site measurement of the torque of the motorcycle handlebar.

[0005] A motorcycle handlebar torque test device comprises a first connection part, an extension column, a second connection part and a test handlebar which are fixedly connected in sequence from bottom to top; the first connection part is fixedly arranged on the top of the motorcycle upper connecting plate by bolts, the extension column is coaxial with the steering column, the two ends of the extension column extend into the first connection part and the second connection part, and the test handlebar is fixedly connected to the side wall of the second connection part away from the rider;

[0006] Wherein, the first connecting portion includes a tube hole and a plurality of first through holes, the tube hole is used to pass through the steering column, and the plurality of first through holes are aligned with and adapted to the mounting holes of the upper connecting plate;

[0007] The second connecting portion has a tube hole for passing through the steering column, and the tube hole of the first connecting portion is coaxially arranged with the tube hole of the second connecting portion;

[0008] The extension column includes a cylindrical column body, and both ends of the body have shoulders for inserting into the tube holes of the first and second connecting parts; a plurality of metal foil strain gauges are adhered to the side walls of the column body; the plurality of strain gauges use a bridge circuit as their measurement circuit, and the strain gauges are externally connected to a strain testing device.

[0009] Furthermore, the first connecting part also includes a first positioning hole, and the second connecting part also includes a second positioning hole. The first positioning hole and the second positioning hole are arranged at corresponding positions and are used to insert a positioning pin when installing the torque testing device to align and install the two connecting parts.

[0010] Furthermore, the extension column is a solid column or a hollow column.

[0011] Furthermore, the height of the shoulder is adapted to the thickness of the first and second connecting parts.

[0012] A motorcycle handlebar torque testing method comprises the following steps:

[0013] Step 1: insert the first connection part and the second connection part into the shoulder of the extension column respectively, insert the first positioning hole of the first connection part and the second positioning hole of the second connection part on the same side into the positioning pin to align and install the two connection parts; then weld the first connection part, the extension column and the second connection part;

[0014] Then, a test handlebar is welded to the side wall of the second connecting portion away from the rider, thereby completing the manufacture of the motorcycle handlebar torque testing device;

[0015] Step 2: Remove the fixings between the upper connecting plate and the handlebar of the motorcycle to be tested, and remove the handlebar of the motorcycle;

[0016] Step 3: The first connection part is fixed on the top of the upper connecting plate by bolts, so that the motorcycle handlebar torque test device is installed on the motorcycle to be measured, and the steering column of the motorcycle is coaxially arranged with the extension column; a strain test device is connected to the strain gauge, and the strain test device is installed on the rear frame of the motorcycle;

[0017] Step 4: The tester rotates the test handlebar, and the strain gauge located on the extension column transmits the strain force to the strain testing device and displays it on the display thereon; then the current torque of the motorcycle is obtained based on the measured strain force, steering column diameter and shear modulus.

[0018] Furthermore, when the extension column is a hollow column, the torque calculation formula in step 4 is:

[0019]

[0020] Wherein, M represents torque, Nm; G represents shear modulus, pa; D is the outer diameter of the steering column, m; ε is the measured strain value; d is the inner diameter of the steering column, m.

[0021] Furthermore, when the extension column is a solid column, the torque calculation formula in step 4 is:

[0022]

[0023] Wherein, M represents torque, Nm; G represents shear modulus, pa; D is the outer diameter of the steering column, m; ε is the measured strain value.

[0024] Compared with the prior art, the present invention has the following beneficial effects and significant improvements:

[0025] The motorcycle handlebar torque test device and the test method of the present invention have the advantages of simple structure and convenient use. An extension column of the motorcycle steering column is provided, and two connecting parts are inserted into the extension column. At the same time, the two connecting parts are positioned by inserting positioning pins into the positioning holes therein during production to ensure the correct installation of the test device. When in use, the existing handlebar of the motorcycle can be removed and the test device can be fixed by bolts to realize on-site measurement of the torque of the motorcycle handlebar. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of the motorcycle handlebar torque testing device of the present invention being installed on the front wheel;

[0027] Figure 2 is a schematic structural diagram of the first connecting portion of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the extension column of the present invention;

[0029] Figure 4 is a structural schematic diagram of the second connecting portion of the present invention;

[0030] Figure 5 The present invention is a flowchart of the motorcycle handlebar torque testing method.

[0031] In the figure:

[0032] 1: First connection part 2: Extension column 3: Second connection part

[0033] 4: Test handlebar 5: Front wheel 6: Cantilever 7: Steering column

[0034] 8: Upper connecting plate 9: Lower connecting plate 10: Pipe hole

[0035] 11: First through hole 12: First positioning hole 21: Strain gauge

[0036] 22: Column body 23, 24: Shoulder 31: Second positioning hole DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution, beneficial effects and significant progress of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the drawings provided in the embodiments of the present invention. Obviously, all the described embodiments are only partial embodiments of the present invention, rather than all embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] The existing motorcycle steering column is fixedly connected between the upper connecting plate 8 and the lower connecting plate 9 of the motorcycle, and the torque of the steering column cannot be accurately measured. Therefore, the present invention is based on directly installing a test device on the motorcycle to measure the torque of the motorcycle on site.

[0039] like Figure 1-5 As shown, a motorcycle handlebar torque testing device and testing method, the testing device comprises: a first connecting part 1, an extension column 2, a second connecting part 3 and a test handlebar 4 welded in sequence from bottom to top; the first connecting part 1 is fixedly arranged on the top of a connecting plate 8 on a motorcycle by bolts, the extension column 2 is coaxial with a steering column 7, shoulders 23 and 24 at both ends of the extension column 2 extend into the second connecting part 3 and the first connecting part 1 respectively, and a test handlebar 4 is welded on the side wall of the second connecting part 3 away from the rider.

[0040] like Figure 2 , as shown in FIG. 4 , the first connection part 1 includes a tube hole 10 and four first through holes, the tube hole is used to pass through the steering column, the four first through holes are aligned in pairs and aligned with and adapted to the mounting holes of the upper connecting plate 8; the second connection part 3 has a tube hole 10 for passing through the steering column, and the tube hole of the first connection part is coaxially arranged with the tube hole of the second connection part. The first connection part 1 also includes two first positioning holes 12 respectively located on both sides of the tube hole 10, and the second connection part 2 also includes two second positioning holes 31 respectively located on both sides of the tube hole 10. The first positioning holes 12 and the second positioning holes 31 are arranged in corresponding positions, and are used for inserting positioning pins when installing the torque testing device to align and install the two connection parts,

[0041] like Figure 3As shown, the extension column 2 is a solid column or a hollow column. The extension column 2 includes a cylindrical column body 22, and the two ends of the column body 22 have shoulders 23 and 24, wherein the shoulder 23 is inserted into the tube hole 10 of the first connecting part 1, and the shoulder 24 is inserted into the tube hole 10 of the second connecting part 3; the height of the shoulder 23 is the same as the thickness of the first connecting part, and the height of the shoulder 24 is the same as the thickness of the second connecting part. Two metal foil strain gauges 21 are adhered to the side wall of the column body 22; multiple strain gauges use a bridge circuit as their measurement circuit, and the strain gauge is externally connected to a strain testing device. The strain gauge 21 of the present invention uses a full-bridge circuit because of its simple structure, high sensitivity, wide measurement range, good linearity, and easy temperature compensation, which can better meet various strain measurement requirements.

[0042] When in use, the test method using the motorcycle handlebar torque test device comprises the following steps:

[0043] Step 1: insert the first connection part 1 and the second connection part 3 into the shoulder of the extension column respectively, insert the first positioning hole 12 of the first connection part 1 and the second positioning hole 31 of the second connection part 3 on the same side into the positioning pin, so as to align and install the two first and second connection parts; then weld the first connection part 1, the extension column 2 and the second connection part 3;

[0044] Then, a test handlebar 4 is welded to the side wall of the second connecting portion 3 away from the rider, thereby completing the manufacture of the motorcycle handlebar torque test device;

[0045] Step 2: Remove the screws between the upper connecting plate 8 and the motorcycle handlebar of the motorcycle to be tested, remove the upper cover covering the motorcycle handlebar, and remove the motorcycle handlebar at the same time;

[0046] Step 3: Pass a bolt through the first through hole 11 of the first connecting part 1 at the top of the upper connecting plate 8, thereby fixing the first connecting part 1 and the upper connecting plate 8, and then install the motorcycle handlebar torque test device on the motorcycle to be measured, at this time, the steering column 7 of the motorcycle is coaxially arranged with the extension column 2; a strain test device is connected to the strain gauge 21, and the strain test device is installed on the rear frame of the motorcycle;

[0047] Step 4: The tester rotates the test handlebar 4, and the strain gauge 21 located on the extension column 2 transmits the strain force to the strain test device and displays it on the display thereon;

[0048] When the extension column is a hollow column, the torque calculation formula obtained after the test handlebar is turned is:

[0049]

[0050] Wherein, M represents torque, Nm; G represents shear modulus, pa; D is the outer diameter of the steering column, m; ε is the strain value measured by the strain gauge; d is the inner diameter of the steering column, m.

[0051] When the extension column is a solid column, the torque calculation formula is:

[0052]

[0053] Among them, M represents torque, Nm; G represents shear modulus, pa; D is the outer diameter of the steering column, m; ε is strain.

[0054] Then, the torque of the current motorcycle is obtained based on the measured strain, steering column diameter and shear modulus. The obtained torque is then compared with the factory setting of the motorcycle to determine whether the torque of the tested motorcycle is qualified.

[0055] The above embodiments and specific cases are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. The non-essential improvements, adjustments or replacements made by those skilled in the art based on the contents of this specification are all within the scope of protection required by the present invention.

Claims

1. A motorcycle handlebar torque testing device, characterized in that: The invention comprises a first connecting part (1), an extension column (2), a second connecting part (3) and a test handlebar (4) which are fixedly connected in sequence from bottom to top; the first connecting part (1) is fixedly arranged on the top of a connecting plate (8) on a motorcycle by means of bolts, the extension column (2) is coaxial with a steering column (7), both ends of the extension column (2) extend into the first connecting part (1) and the second connecting part (3), and the test handlebar (4) is fixedly connected to the side wall of the second connecting part (3) away from the rider; Wherein, the first connecting portion (1) comprises a tube hole (10) and a plurality of first through holes, the tube hole (10) is used to pass through the steering column, and the plurality of first through holes are aligned with and adapted to the mounting holes of the upper connecting plate (8); The second connecting portion (3) has a tube hole (10) for passing through the steering column, and the tube hole of the first connecting portion (1) is coaxially arranged with the tube hole of the second connecting portion; The extension column (2) comprises a cylindrical column body, and both ends of the body have shaft shoulders (23, 24) for inserting into the tube holes of the first and second connecting parts; a plurality of metal foil strain gauges (21) are adhered to the side wall of the column body (22); the plurality of strain gauges (21) use a bridge circuit as their measurement circuit, and the strain gauges are externally connected to a strain testing device.

2. The motorcycle handlebar torque testing device according to claim 1, characterized in that: The first connecting portion (1) further comprises a first positioning hole (12), and the second connecting portion (3) further comprises a second positioning hole (31). The first positioning hole (12) and the second positioning hole (31) are arranged at corresponding positions and are used for inserting a positioning pin when installing the torque testing device so as to align and install the two connecting portions.

3. The motorcycle handlebar torque testing device according to claim 1, characterized in that: The extension column (2) is a solid column or a hollow column.

4. The motorcycle handlebar torque testing device according to claim 2, characterized in that: The height of the shaft shoulders (23, 24) is adapted to the thickness of the first and second connecting parts.

5. A testing method using the motorcycle handlebar torque testing device according to claim 1, comprising the following steps: Step 1: insert the first connecting part (1) and the second connecting part (3) into the shaft shoulder of the extension column respectively, insert the positioning pin into the first positioning hole (12) of the first connecting part (1) and the second positioning hole (31) of the second connecting part (3) on the same side, so as to align and install the two connecting parts; then weld the first connecting part (1), the extension column (2) and the second connecting part (3); Then, a test handlebar (4) is welded to the side wall of the second connecting portion (3) away from the rider, thereby completing the manufacture of the motorcycle handlebar torque testing device; Step 2: removing the fixings between the upper connecting plate (8) and the handlebar of the motorcycle to be tested, and removing the handlebar of the motorcycle; Step 3: The first connection part (1) is fixed to the top of the upper connecting plate (8) by bolts, so that the motorcycle handlebar torque test device is installed on the motorcycle to be measured, and the steering column (7) and the extension column (2) of the motorcycle are coaxially arranged; a strain test device is connected to the strain gauge (21), and the strain test device is installed on the rear frame of the motorcycle; Step 4: The tester rotates the test handlebar (4), and the strain gauge (21) located on the extension column (2) transmits the strain force to the strain testing device and displays it on the display thereon; then, the current torque of the motorcycle is obtained based on the measured strain force, steering column diameter and shear modulus.

6. The test method according to claim 5, characterized in that: When the extension column (2) is a hollow column, the torque calculation formula in step 4 is: Wherein, M represents torque, Nm; G represents shear modulus, pa; D is the outer diameter of the steering column, m; ε is the measured strain value; d is the inner diameter of the steering column, m.

7. The test method according to claim 5, characterized in that: When the extension column (2) is a solid column, the torque calculation formula in step 4 is: Wherein, M represents torque, Nm; G represents shear modulus, pa; D is the outer diameter of the steering column, m; ε is the measured strain value.

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