Motorcycle gear position detection mechanism

Abstract

The present invention provides a motorcycle gear position detection mechanism, which belongs to the field of mechanical technology. It solves the problem that the existing motorcycle gear position detection has poor stability, which may lead to incorrect gear position display. The motorcycle includes a gear shift drum and a gear shift paddle fixed on the gear shift drum. The gear position detection mechanism includes a Hall chip and a magnetic part that can generate a magnetic field. The gear shift paddle is connected to the magnetic part and can drive the magnetic part to rotate. The magnetic part and the Hall chip are arranged relative to each other and have a spacing. The Hall chip is used to detect the rotation angle signal of the magnetic flux lines generated by the magnetic part. Compared with the existing contact type structure, the gear position detection mechanism will not produce wear, and the requirements for installation accuracy and processing accuracy are also lower. At the same time, it will not cause signal interruption due to vibration during driving. It has high detection accuracy and detection stability, making the gear position display more accurate and avoiding incorrect gear position display.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a gear position detection mechanism for a motorcycle. Background Art

[0002] The gear shifting of motorcycles is operated by pedaling back and forth. It is not directional like the gear shifting of other vehicles, and the gear position visibility of motorcycles is zero. Therefore, the driver relies entirely on feeling and experience to judge the gear position, which is even more difficult for beginners. It is easy to damage the gear mechanism due to misoperation, and the driving is not smooth, which increases the difficulty of driving. Therefore, the motorcycle gear position display is produced. It uses the gear position display on the instrument to display the corresponding gear position when the motorcycle shifter is in different gear positions, so that the driver can clearly and intuitively understand whether the gear is engaged at the time.

[0003] For example, a Chinese patent application (application number: 201820000543.7) discloses a split multi-gear display structure for motorcycles, including a gear shift drum, a positioning pin, a gear shift dial, a gear display contact base, a gear display contact, a gear display contact spring, a gear shift shaft cover, and a multi-gear display sensor. When the gear shift drum rotates, the gear shift dial and the gear display contact base rotate accordingly. When the gear shift drum is rotated to the corresponding gear, the gear display contact contacts the copper sheet of the multi-gear display sensor under the force of the gear display contact spring, and the gear display on the instrument is connected to display the corresponding gear.

[0004] Although the above-mentioned gear display structure can realize the display of multiple gears, it still has the following defects: in this gear display structure, the gear display contact on the gear display contact base rotates and contacts the copper sheet of the multi-gear display sensor elastically in turn to trigger the signal and realize the detection of each gear information. Therefore, the concentricity requirements of the copper sheets on the multi-gear display sensor and the accuracy requirements of the installation position are relatively high. If one of them does not meet the requirements, it will cause the gear display contact to be unable to contact the copper sheet during the rotation process, and the detection stability is poor, which will lead to the wrong display of the gear. Moreover, the signal is triggered by the pressing contact between the gear display contact and the spring. After a long time, the two will wear and the spring will also have elastic fatigue, which will lead to poor contact between the two, poor detection stability, and cause the gear to be displayed incorrectly. At the same time, the vibration during the driving of the motorcycle may also cause the gear display contact and the spring to be separated momentarily, causing abnormal signal interruption, poor detection stability, and cause the gear to be displayed incorrectly. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the prior art and to propose a motorcycle gear position detection mechanism. The technical problem to be solved by the present invention is: how to solve the problem that the existing motorcycle gear position detection has poor stability and may lead to incorrect gear position display.

[0006] The objective of the present invention can be achieved through the following technical solutions: a motorcycle gear position detection mechanism, the motorcycle includes a gear shift drum and a gear shift dial fixed on the gear shift drum, characterized in that the gear position detection mechanism includes a Hall chip and a magnetic part capable of generating a magnetic field, the gear shift dial is connected to the magnetic part and can drive the magnetic part to rotate, the magnetic part and the Hall chip are arranged relative to each other and have a spacing, and the Hall chip is used to detect the rotation angle signal of the magnetic flux lines generated by the magnetic part.

[0007] When the motorcycle is shifting gears, the gear shift drum is controlled by the gear shift mechanism to rotate and switch to the corresponding gear position. During this process, the gear shift drum can drive the gear shift dial to rotate together, and then drive the magnetic part to rotate. The Hall chip can detect the rotation angle of the magnetic flux lines between the N pole and the S pole of the magnetic part, and convert the rotation angle into gear information and transmit it to the gear display of the motorcycle instrument panel for gear display. This gear detection mechanism is set up by setting a gear detection mechanism with a new structure, and at the same time, the connection relationship and matching relationship between the gear shift dial and the detection mechanism are innovatively designed, that is, the gear shift dial controls the rotation of the magnetic part through a hard mechanical structure, and there is no contact relationship between the magnetic part and the Hall chip, and there is no wear. Compared with the existing contact type structure, it will not produce wear, and the requirements for installation accuracy and processing accuracy are also lower. At the same time, it will not cause signal interruption due to vibration during driving. It has high detection accuracy and detection stability, making the gear display more accurate and avoiding the wrong display of the gear. In addition, the direct hard mechanical structure connection method makes the overall structure simpler and more compact.

[0008] In the above-mentioned motorcycle gear position detection mechanism, the gear shift dial is also provided with a circumferentially positioned rotating block, the rotating block has a flat plug-in portion, the magnetic member has a flat plug-in slot, and the plug-in portion is plugged into the plug-in slot. The cooperation with the gear position sensor is achieved by the mutual hard mechanical plug-in contact between the flat plug-in portion and the plug-in slot. Compared with the contact-type structure, it has higher detection accuracy and detection stability, making the gear position display more accurate and avoiding the wrong display of the gear position. Moreover, through the above-mentioned structural setting, the radial dimension of the plug-in portion along the gear shift drum can be made smaller, the structure is more compact, and the space occupied is smaller, which is more obvious, especially in the narrow installation space of the motorcycle gear shift mechanism.

[0009] Preferably, in the above-mentioned motorcycle gear position detection mechanism, there is a gap between the two side walls of the plug-in portion in the width direction and the inner wall of the plug-in slot, and the two side walls of the plug-in portion in the thickness direction are in contact with the inner wall of the plug-in slot. Through the above-mentioned arrangement, when vibration occurs during the running of the motorcycle, there is a certain shaking space between the plug-in portion of the rotating block and the magnetic part, which reduces the vibration force transmitted to the magnetic part by the rotating block and avoids damage, while ensuring that the two can ensure synchronous rotation in the circumferential direction, ensuring the stability of the detection, making the gear position display more accurate, and avoiding the wrong display of the gear position.

[0010] In the above-mentioned motorcycle gear position detection mechanism, the side of the plug-in portion also has a protruding limiting portion, and the side wall of the plug-in slot also has a limiting slot, the limiting slot is connected to the plug-in slot and the two together form a T-shaped slot, and the limiting portion is inserted into the limiting slot. Through the T-shaped matching structure, the matching strength between the two can be guaranteed, and at the same time, the radial size of the rotating block along the gear shift drum can be reduced to the maximum extent, the structure is more compact, and the space occupied is smaller, especially in the narrow installation space of the motorcycle shift mechanism.

[0011] In the above-mentioned motorcycle gear position detection mechanism, the rotating block also includes a connecting portion and a positioning portion, both of which are cylindrical. The plug-in portion and the connecting portion are integrally formed at the two ends of the positioning portion, respectively. The outer diameter of the connecting portion is smaller than the outer diameter of the positioning portion. The shifting dial has a connecting tube and the rollers on the shifting dial are arranged circumferentially around the connecting tube. The positioning portion is also provided with a positioning groove. The edge of the port of the connecting tube has a protruding positioning block. The connecting portion is inserted into the connecting tube, the positioning portion abuts against the edge of the port of the connecting tube, and the positioning block is inserted into the positioning groove. The radial and axial limiting of the shifting dial is achieved by the connecting portion and the positioning portion, and the circumferential limiting of the shifting dial is achieved by the cooperation of the positioning block and the positioning groove. Moreover, through the above-mentioned arrangement, the overall radial size of the rotating block can be further made smaller, the structure is more compact, and the space occupied is smaller, which is more obvious in the narrow installation space of the motorcycle shifting mechanism.

[0012] In the above-mentioned motorcycle gear position detection mechanism, the positioning groove is provided on the outer side wall of the positioning part and passes through both ends of the positioning part, the outer peripheral wall of the positioning part is flush with the outer peripheral wall of the connecting tube, and the outer wall of the positioning block is flush with the outer wall of the connecting tube. Through the above-mentioned arrangement, the radial size of the rotating block is further reduced, the structure is more compact, and the space occupied is smaller, which is more obvious in the narrow installation space of the motorcycle shift mechanism.

[0013] In the above-mentioned motorcycle gear position detection mechanism, the connection between the two side walls of the positioning block and the edge of the connecting tube port has an inwardly concave groove. The structural design of the grooves on both sides can prevent the positioning block from breaking due to excessive stress concentration at the connection on both sides.

[0014] In the above-mentioned motorcycle gear position detection mechanism, the positioning groove extends to the connecting portion and passes through the end surface of the connecting portion, the two side walls of the positioning block are in contact with the two side walls of the positioning groove, and there is a gap between the positioning block and the bottom wall of the positioning groove. Through the above-mentioned arrangement, radial force on the positioning block is avoided, and the positioning block is further prevented from being broken due to large force.

[0015] In the above-mentioned motorcycle gear position detection mechanism, the gear position detection mechanism also includes a housing for fixing on the motorcycle frame, the magnetic member and the Hall chip are both arranged in the housing, and the magnetic member can rotate relative to the housing, the magnetic member also has an indication arrow, and the end surface of the housing is also provided with a plurality of gear position indication grooves distributed along the circumferential direction, and the indication arrow can be opposite to one of the gear position indication grooves by rotation. The design of the indication arrow and the gear position indication groove facilitates the gear adjustment of the motorcycle before leaving the factory or during maintenance.

[0016] In the above-mentioned motorcycle gear position detection mechanism, the magnetic member is a magnetic block made of magnetic material, or the magnetic member includes a rotating body that can rotate relative to the shell, and a magnetic sheet is provided on the rotating body, and the magnetic sheet is opposite to the Hall chip.

[0017] Compared with the prior art, the motorcycle gear position detection mechanism has the following advantages:

[0018] 1. Compared with the existing contact structure, it will not cause wear, and the requirements for installation accuracy and processing accuracy are also lower. At the same time, it will not cause signal interruption due to vibration during driving. It has higher detection accuracy and detection stability, making the gear display more accurate and avoiding incorrect display of the gear.

[0019] 2. The radial dimension of the rotating block along the shift drum can be made smaller, the structure is more compact, and the space occupied is smaller, which is more obvious in the narrow installation space of the motorcycle shift mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a three-dimensional structural diagram of the gear position detection mechanism of the motorcycle.

[0021] Figure 2 It is the front view of the gear position detection mechanism of this motorcycle.

[0022] Figure 3 yes Figure 2 Section view along AA direction.

[0023] Figure 4 yes Figure 2 Cross-sectional view along the BB direction.

[0024] Figure 5 This is a three-dimensional structural diagram of the gear position sensor.

[0025] Figure 6 It is a three-dimensional structural diagram of the transfer block.

[0026] Figure 7 It is a three-dimensional structural diagram of the shift dial.

[0027] In the figure, 1, shift drum; 2, shift dial; 2a, connecting tube; 2a1, positioning block; 2a2, groove; 2b, roller; 3, gear position sensor; 3a, housing; 3a1, gear position indication slot; 3b, Hall chip; 3c, magnetic part; 3c1, rotating body; 3c2, magnetic sheet; 3c3, plug-in slot; 3c4, limit slot; 3c5, indication arrow; 3d, control circuit board; 4, rotating block; 4a, plug-in part; 4a1, limit part; 4b, connecting part; 4c, positioning part; 4d, positioning slot. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] Embodiment 1

[0030] like Figure 1-7 As shown, the motorcycle includes a shift drum 1 and a shift paddle 2. The shift paddle 2 is sleeved on one end of the shift drum 1 and fixed to the shift drum 1 by bolts. The shift paddle 2 has a plurality of rollers 2b arranged along the circumferential direction. The shift paddle 2 also has a protruding connecting tube 2a and the rollers 2b are arranged around the connecting tube 2a. The gear position detection mechanism includes a gear position sensor 3 for detecting gear position information and a rotating block 4 positioned circumferentially with the shift paddle 2.

[0031] Specifically, the gear position sensor 3 includes a shell 3a, a control circuit board 3d, a Hall chip 3b and a magnetic part 3c that can generate a magnetic field. The control circuit board 3d and the Hall chip 3b are both fixed in the shell 3a and the Hall chip 3b is electrically connected to the motorcycle dashboard through the control circuit board 3d. The magnetic part 3c is arranged in the shell 3a. The rotating block 4 is connected to the magnetic part 3c and can drive the magnetic part 3c to rotate relative to the shell 3a. The magnetic part 3c and the Hall chip 3b are arranged opposite to each other. The Hall chip 3b is used to detect the rotation angle signal of the magnetic flux lines generated by the magnetic part 3c and convert the signal into gear information and transmit it to the motorcycle dashboard for display.

[0032] Further, the rotating block 4 includes a flat plug-in portion 4a, and a connecting portion 4b and a positioning portion 4c, both of which are cylindrical. The plug-in portion 4a and the connecting portion 4b are integrally formed at the two ends of the positioning portion 4c, respectively. The outer diameter of the connecting portion 4b is smaller than the outer diameter of the positioning portion 4c, and the width and thickness of the plug-in portion 4a are smaller than the outer diameter of the connecting portion 4b. A positioning groove 4d is also provided on the outer wall of the positioning portion 4c. One end of the positioning groove 4d passes through the end surface of the positioning portion 4c connected to the plug-in portion 4a, and the other end of the positioning groove 4d extends to the connecting portion 4b and passes through the end surface of the connecting portion 4b. The port edge of the connecting tube 2a has a protruding positioning block 2a1. The connecting portion 4b is inserted into the connecting tube 2a, and the positioning portion 4c abuts against the port edge of the connecting tube 2a, realizing radial and axial limitation with the shift dial 2. The positioning block 2a1 is inserted into the positioning groove 4d, realizing circumferential limitation with the shift dial 2. The outer peripheral wall of the positioning portion 4c is flush with the outer peripheral wall of the connecting tube 2a, and the outer wall of the positioning block 2a1 is flush with the outer wall of the connecting tube 2a, which further reduces the radial size of the rotating block 4, makes the structure more compact, and occupies less space, which is more obvious in the narrow installation space of the motorcycle shift mechanism.

[0033] The two side walls of the positioning block 2a1 are in contact with the two side walls of the positioning groove 4d, and there is a gap between the positioning block 2a1 and the bottom wall of the positioning groove 4d, which prevents the positioning block 2a1 from being subjected to radial force, and further prevents the positioning block 2a1 from being broken due to a large force. The connection between the two side walls of the positioning block 2a1 and the edge of the port of the connecting tube 2a has an inwardly concave groove 2a2, which can prevent the positioning block 2a1 from being broken due to excessive stress concentration at the connection on both sides.

[0034] Furthermore, the magnetic part 3c has a flat plug-in slot 3c3, and a limiting slot 3c4 is also provided on the side wall of the plug-in slot 3c3. The limiting slot 3c4 is connected to the plug-in slot 3c3 and the two together form a T-shaped slot. The side of the plug-in portion 4a also has a protruding limiting portion 4a1, and the plug-in portion 4a is plugged into the plug-in slot 3c3, and the limiting portion 4a1 is plugged into the limiting slot 3c4. There is a gap between the two side walls of the plug-in portion 4a in the width direction and the inner wall of the plug-in slot 3c3, and the two side walls of the plug-in portion 4a in the thickness direction are close to the inner wall of the plug-in slot 3c3. When the motorcycle vibrates during driving, there is a certain shaking space between the plug-in portion 4a of the rotating block 4 and the magnetic part 3c, which reduces the vibration force transmitted to the magnetic part 3c by the rotating block 4 and avoids damage. The magnetic member 3c also has an indication arrow 3c5, and the end surface of the housing 3a is also provided with a plurality of gear indication slots 3a1 distributed along the circumferential direction. The indication arrow 3c5 can be opposite to one of the gear indication slots 3a1 by rotating, so as to facilitate the gear adjustment of the motorcycle before leaving the factory or during maintenance. In this embodiment, the magnetic member 3c includes a rotating body 3c1 that can rotate relative to the housing 3a, the plug-in slot 3c3 and the limit slot 3c4 are both provided on the rotating body 3c1, the indication arrow 3c5 is arranged on the rotating body 3c1, and a magnetic sheet 3c2 is arranged on the rotating body 3c1, and the magnetic sheet 3c2 is opposite to the Hall chip 3b.

[0035] The working principle of the gear position detection mechanism of the motorcycle is as follows: when the motorcycle is shifting gears, the gear shift drum 1 is controlled to rotate and switch to the corresponding gear position through the gear shift mechanism. During this process, the gear shift drum 1 can drive the gear shift dial 2 and the rotary block 4 to rotate together, and the rotary block 4 then drives the rotating body 3c1 and the magnetic piece 3c2 to rotate relative to the shell 3a. The Hall chip 3b arranged in the shell 3a can detect the rotation angle of the magnetic flux line between the N pole and the S pole of the magnetic piece 3c2, and convert the rotation angle into gear position information, which is transmitted to the gear position display on the motorcycle instrument panel through the control circuit board 3d for gear position display.

[0036] The gear position detection mechanism is provided with a gear position sensor 3 of a brand-new structure. At the same time, the rotating block 4 controls the rotation of the magnetic part 3c of the sensor through a hard mechanical structure. There is no contact relationship between the magnetic part 3c and the Hall chip 3b, and there is no wear. Compared with the existing contact type structure, it will not produce wear, and the requirements for installation accuracy and processing accuracy are also lower. At the same time, it will not cause signal interruption due to vibration during driving. It has high detection accuracy and detection stability, making the gear position display more accurate and avoiding erroneous display of the gear position.

[0037] Embodiment 2

[0038] The structure and features of this embodiment are substantially the same as those of the first embodiment, except that the magnetic member 3c is a magnetic block made of magnetic material.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0040] Although the shift drum 1, shift paddle 2, connecting tube 2a, positioning block 2a1, groove 2a2, roller 2b, gear position sensor 3, housing 3a, gear position indicating groove 3a1, Hall chip 3b, magnetic member 3c, rotating body 3c1, magnetic sheet 3c2, plug-in slot 3c3, limit slot 3c4, indicating arrow 3c5, control circuit board 3d, rotating block 4, plug-in part 4a, limit part 4a1, connecting part 4b, positioning part 4c, positioning groove 4d and other terms are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A gear position detection mechanism for a motorcycle, the motorcycle comprising a gear shift drum (1) and a gear shift paddle (2) fixed on the gear shift drum (1), characterized in that: The gear position detection mechanism comprises a Hall chip (3b) and a magnetic part (3c) capable of generating a magnetic field; the gear shift dial (2) is connected to the magnetic part (3c) and can drive the magnetic part (3c) to rotate; the magnetic part (3c) and the Hall chip (3b) are arranged relative to each other and have a spacing; the Hall chip (3b) is used to detect the rotation angle signal of the magnetic flux lines generated by the magnetic part (3c); the gear shift dial (2) is also provided with a circumferentially positioned rotating block (4); the rotating block (4) has a flat plug-in portion (4a); the rotating block (4) also comprises a connecting portion (4b) and a positioning portion (4c) both in a cylindrical shape; the plug-in portion (4a) and the connecting portion (4b) are respectively integrally formed at two ends of the positioning portion (4c); the outer diameter of the connecting portion (4b) is smaller than the outer diameter of the positioning portion (4c). The outer diameter of the part (4c) is 1.5 mm, the shift paddle wheel (2) has a connecting tube (2a) and the rollers (2b) on the shift paddle wheel (2) are arranged around the connecting tube (2a) in the circumferential direction, the positioning part (4c) is also provided with a positioning groove (4d), the port edge of the connecting tube (2a) has a protruding positioning block (2a1), the connecting part (4b) is inserted into the connecting tube (2a), the positioning part (4c) abuts against the port edge of the connecting tube (2a) and the positioning block (2a1) is inserted into the positioning groove (4d); the gear position detection mechanism also includes a shell (3a) for fixing on the motorcycle frame, the magnetic part (3c) and the Hall chip (3b) are both arranged in the shell (3a), and the magnetic part (3c) can rotate relative to the shell (3a).

2. The motorcycle gear position detection mechanism according to claim 1, characterized in that: The magnetic member (3c) has a flat insertion groove (3c3), and the insertion portion (4a) is inserted into the insertion groove (3c3).

3. The motorcycle gear position detection mechanism according to claim 2, characterized in that: There is a gap between the two side walls of the plug-in portion (4a) in the width direction and the inner wall of the plug-in slot (3c3), and the two side walls of the plug-in portion (4a) in the thickness direction are in contact with the inner wall of the plug-in slot (3c3).

4. The motorcycle gear position detection mechanism according to claim 2, characterized in that: The side surface of the plug-in portion (4a) also has a protruding limiting portion (4a1), and the side wall of the plug-in slot (3c3) also has a limiting slot (3c4), the limiting slot (3c4) is connected to the plug-in slot (3c3) and the two together form a T-shaped slot, and the limiting portion (4a1) is plugged into the limiting slot (3c4).

5. The motorcycle gear position detection mechanism according to claim 1, 2, 3 or 4, characterized in that: The positioning groove (4d) is provided on the outer side wall of the positioning portion (4c) and passes through both ends of the positioning portion (4c); the outer peripheral wall of the positioning portion (4c) is flush with the outer peripheral wall of the connecting tube (2a); and the outer wall of the positioning block (2a1) is flush with the outer wall of the connecting tube (2a).

6. The motorcycle gear position detection mechanism according to claim 1, 2, 3 or 4, characterized in that: The connection points between the two side walls of the positioning block (2a1) and the edge of the port of the connecting tube (2a) are both provided with inwardly concave grooves (2a2).

7. The motorcycle gear position detection mechanism according to claim 1, 2, 3 or 4, characterized in that: The positioning groove (4d) extends to the connecting portion (4b) and passes through the end surface of the connecting portion (4b), the two side walls of the positioning block (2a1) are in contact with the two side walls of the positioning groove (4d), and there is a gap between the positioning block (2a1) and the bottom wall of the positioning groove (4d).

8. The motorcycle gear position detection mechanism according to claim 1, 2, 3 or 4, characterized in that: The magnetic member (3c) is also provided with an indication arrow (3c5), and the end surface of the housing (3a) is also provided with a plurality of gear indicating grooves (3a1) distributed along the circumferential direction, and the indication arrow (3c5) can be opposite to one of the gear indicating grooves (3a1) by rotating.

9. The motorcycle gear position detection mechanism according to claim 1, 2, 3 or 4, characterized in that: The magnetic member (3c) is a magnetic block made of magnetic material, or the magnetic member (3c) comprises a rotating body (3c1) that can rotate relative to the housing (3a), and a magnetic sheet (3c2) is provided on the rotating body (3c1), and the magnetic sheet (3c2) is opposite to the Hall chip (3b).

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