A kind of auxiliary wheel rotation limiting mechanism based on gear limiting

Abstract

The utility model relates to vehicle auxiliary wheel device technical field, concretely is a kind of auxiliary wheel rotation limiting mechanism based on gear limiting, including transmission pedestal, gear installation groove in the transmission pedestal is provided with pivot, sector gear, arc limiting block, and motor module is passed through the meshing transmission of gear shaft and sector gear on the outer bottom surface of transmission pedestal;Pivot one end is connected with support arm module, and the other end is sleeved sector gear;Arc limiting block is sleeved with the first positioning column of transmission pedestal through positioning hole, and the both ends of its are carried out rotation limiting to sector gear.This mechanism realizes rotation limiting by gear transmission and arc limiting block cooperation, avoids folding assembly itself to participate in limiting, solves the problem that folding assembly is deformed due to rigid limiting in prior art, improves rotation control precision and use safety.

Description

Technical Field

[0001] This utility model relates to the field of vehicle auxiliary wheel device technology, and in particular to an auxiliary wheel rotation limiting mechanism based on gear limiting. Background Technology

[0002] In the field of two-wheeled vehicle assistance devices, to achieve driving assistance functions, a structure is often used, such as the one disclosed in patent CN221068290 U, which uses a motor to drive the folding assembly to retract and extend, thereby driving the roller to retract and extend. The core of this design is to utilize the folding assembly's own structure for rotational limiting. However, this design has a significant drawback: during long-term use, the rigid limiting design of the folding assembly (especially the lever) lacks buffering, and the impact load during each limiting action is directly transmitted to the component. Furthermore, the lever's force path is singular and concentrated, resulting in excessive load. Combined with the cumulative fatigue effect of long-term operation and insufficient redundancy in the structural design, deformation is highly likely. This deformation leads to a decrease in rotational control accuracy and, in severe cases, even causes safety accidents. Specifically, the rigid limiter's hard contact causes the impact force to act directly on key components such as the lower control arm tie rod, and long-term repeated impacts lead to the accumulation of internal stress in the components. As a core force transmission component, the tie rod is stressed at both ends of the connection hole and the middle of the rod body. Without an auxiliary structure to distribute the load, the instantaneous impact force from the weight of the motorcycle body carried by the auxiliary wheel and road condition fluctuations during motorcycle operation far exceeds its static design threshold. At the same time, when the components of the folding assembly move together, the slight wear at the connection points will exacerbate the uneven stress on the rod body, further accelerating the fatigue deformation of the tie rod.

[0003] These problems seriously affect the reliability and safety of the auxiliary wheel device. Therefore, there is an urgent need for an auxiliary wheel rotation limiting mechanism that can avoid the folding component itself from participating in the limiting, improve the rotation control accuracy and safety of use, so as to solve a series of technical problems caused by the deformation of the folding component in the existing technology. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an auxiliary wheel rotation limiting mechanism based on gear limiting. This mechanism solves the technical problem that the existing auxiliary wheel folding assembly is prone to deformation due to its rigid limiting, which leads to a decrease in rotation control accuracy and causes safety accidents. The rotation limiting is achieved through the cooperation of gear transmission and arc-shaped limiting block, avoiding the folding assembly from participating in the limiting, thereby improving control accuracy and safety.

[0005] The above objectives are achieved through the following technical solutions: An auxiliary wheel rotation limiting mechanism based on gear positioning includes a transmission base with a gear mounting groove. A motor module is mounted on the outer bottom surface of the transmission base, and a gear shaft is mounted on the motor module. The gear shaft passes through the transmission base and extends into the gear mounting groove. A shaft limiting groove is provided on the bottom wall of the gear mounting groove. One end of the shaft is movably fitted into the shaft limiting groove, and the other end of the shaft is connected to a support arm module. A sector gear is fitted onto the shaft, and the tooth surface of the sector gear meshes with the gear shaft. A first positioning post is provided on the bottom wall of the gear mounting groove, and a positioning hole is provided on an arc-shaped limiting block. The arc-shaped limiting block is fitted onto the first positioning post through the positioning hole, and the two ends of the arc-shaped limiting block constitute clockwise and counterclockwise rotation limiting blocks for the sector gear.

[0006] Furthermore, the transmission base also includes a base cover plate, which can seal the gear mounting groove. The base cover plate has a shaft through hole, and one end of the shaft passes through the shaft through hole and is fixedly connected to the support arm module.

[0007] Furthermore, the inner wall of the base cover plate is provided with a bearing groove, in which a bearing is embedded, and the inner ring of the bearing is sleeved with the rotating shaft, which facilitates the stable rotation of the rotating shaft.

[0008] Furthermore, the inner wall of the base cover plate is provided with a second positioning post. Both the first positioning post and the second positioning post are inserted into the positioning hole, which facilitates the quick positioning and assembly of the base cover plate and firmly fixes the arc-shaped limiting block.

[0009] Furthermore, the arc-shaped limiting block is provided with three positioning holes, and there are three positioning posts for both the first and second positioning posts, to ensure the stable installation of the arc-shaped limiting block.

[0010] Furthermore, the outrigger module includes a rotating shaft connection part, which is provided with an anti-rotation groove. The anti-rotation groove is sleeved with the end of the rotating shaft to realize synchronous rotation of the rotating shaft and the outrigger module.

[0011] Furthermore, the anti-rotation groove is in the shape of a straight line, and the end of the rotating shaft is in the shape of a straight line that matches the anti-rotation groove, so that the two can move synchronously without rotation after being inserted.

[0012] Furthermore, the support arm module is a folding support arm, including a first support arm and a second support arm that are hinged to each other. The anti-rotation groove of the first support arm is sleeved with the end of the rotating shaft. A roller is movably connected to the end of the second support arm. A pull rod is hinged on the second support arm. The pull rod is movably connected to the pull rod support plate disposed on the transmission base through a pin.

[0013] Furthermore, the arc of the arc-shaped limiting block is 180°, and the arc of the sector gear is 90°, thus limiting the rotation range of the sector gear.

[0014] Furthermore, the motor module is a worm gear motor with a speed reduction function, providing stable speed reduction transmission.

[0015] This utility model provides an auxiliary wheel rotation limiting mechanism based on gear positioning. The limiting is achieved through gear transmission and an arc-shaped limiting block, avoiding the involvement of the folding component in the limiting process, fundamentally solving its deformation problem, and improving rotation control accuracy and mechanism lifespan. Simultaneously, the base cover plate and bearings enhance the stability of the rotating shaft, the arc-shaped limiting block provides double positioning to ensure reliable limiting, and the worm gear motor achieves precise transmission. Overall, this significantly improves the accuracy and safety of the auxiliary wheel's retraction and extension. Specific beneficial effects are as follows: 1. The use of gear transmission and arc-shaped limit blocks for limiting avoids the folding component itself from participating in the limiting, fundamentally solving the deformation problem caused by rigid limiting of the folding component, and improving the rotation control accuracy and service life of the mechanism.

[0016] 2. The base cover plate and bearings improve the stability of the rotating shaft and further ensure the accuracy of the extension and retraction of the outrigger module.

[0017] 3. The arc-shaped limiting block is firmly installed and reliably limited by the dual positioning of the first and second positioning posts, which avoids loosening or displacement of the limiting structure.

[0018] 4. The motor module adopts a worm gear motor, which has a reduction function, stable transmission, and can accurately control the rotation angle of the sector gear, thereby accurately controlling the extension and retraction of the auxiliary wheel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the auxiliary wheel rotation limiting mechanism based on gear limiting according to the present invention; Figure 2 This is an exploded view of an auxiliary wheel rotation limiting mechanism based on gear limiting according to the present invention; Figure 3 This is a schematic diagram of the assembly of the sector gear, rotating shaft and arc-shaped limiting block of the auxiliary wheel rotation limiting mechanism based on gear limiting according to this utility model; Figure 4 This is a schematic diagram of the base cover plate in the auxiliary wheel rotation limiting mechanism based on gear limiting described in this utility model; Figure 5 This is a schematic diagram showing the state in which the sector gear is limited and blocked by one end of the arc-shaped limiting block in the auxiliary wheel rotation limiting mechanism based on gear limiting according to this utility model; Figure 6This is a schematic diagram showing the state in which the sector gear is limited and blocked by the other end of the arc-shaped limiting block in the auxiliary wheel rotation limiting mechanism based on gear limiting according to this utility model.

[0020] Illustration markings: 1-Transmission base, 101-Gear mounting groove, 102-Shaft limiting groove, 103-First positioning post, 104-Base cover plate, 105-Shaft through hole, 106-Bearing groove, 107-Bearing, 108-Second positioning post, 109-Tie rod support plate; 2-Motor module, 201-Gear shaft; 3-Spindle; 4-Sector gear; 5-Outrigger module, 501-Rotating shaft connection, 502-Anti-rotation groove, 503-First outrigger, 504-Second outrigger, 505-Roller, 506-Tie rod; 6-Arc-shaped limiting block, 601-Positioning hole. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] like Figures 1-4 As shown, this solution provides an auxiliary wheel rotation limiting mechanism based on gear limiting, including a transmission base 1, a gear mounting groove 101 provided on the transmission base 1, a motor module 2 mounted on the outer bottom surface of the transmission base 1, the motor module 2 being a worm gear motor with a reduction function, and the gear shaft 201 on the motor module 2 passing through the transmission base 1 and extending into the gear mounting groove 101.

[0023] The bottom wall of the gear mounting groove 101 is provided with a shaft limiting groove 102. One end of the rotating shaft 3 is movably fitted in the shaft limiting groove 102, and the other end of the rotating shaft 3 is connected to the support arm module 5. A sector gear 4 is fitted on the rotating shaft 3. The tooth surface of the sector gear 4 meshes with the gear shaft 201 for transmission. The motor module 2 drives the gear shaft 201 to rotate, which in turn drives the sector gear 4 and the rotating shaft 3 to rotate, thereby realizing the retraction and extension of the support arm module 5.

[0024] Three first positioning posts 103 are provided on the bottom wall of the gear mounting groove 101, and three positioning holes 601 are provided on the arc-shaped limiting block 6. The arc-shaped limiting block 6 is sleeved with the first positioning posts 103 through the positioning holes 601. The two ends of the arc-shaped limiting block 6 constitute clockwise and counterclockwise rotation limiting blocks for the sector gear 4. In this embodiment, the arc of the arc-shaped limiting block 6 is 180°, and the arc of the sector gear 4 is 90°, limiting the rotation range of the sector gear 4 to 90°, thereby precisely controlling the extension and retraction angle of the support arm module 5.

[0025] The transmission base 1 also includes a base cover plate 104, which seals the gear mounting groove 101. A shaft through hole 105 is provided on the base cover plate 104, through which one end of the shaft 3 passes and is fixedly connected to the support arm module 5. A bearing groove 106 is provided on the inner wall of the base cover plate 104, in which a bearing 107 is embedded. The inner ring of the bearing 107 is sleeved with the shaft 3, facilitating stable rotation of the shaft 3. Simultaneously, three second positioning posts 108 are provided on the inner wall of the base cover plate 104. Both the first positioning post 103 and the second positioning post 108 are inserted into the positioning hole 601, facilitating quick positioning and assembly of the base cover plate 104 and firmly fixing the arc-shaped limiting block 6.

[0026] The support arm module 5 includes a rotating shaft connection part 501, which is provided with a straight anti-rotation groove 502. The end of the rotating shaft 3 is straight-shaped and matches the anti-rotation groove 502. The anti-rotation groove 502 is sleeved with the end of the rotating shaft 3 to realize the synchronous rotation of the rotating shaft 3 and the support arm module 5. In this embodiment, the support arm module 5 is a folding support arm, including a first support arm 503 and a second support arm 504 that are hinged to each other. The anti-rotation groove 502 of the first support arm 503 is sleeved with the end of the rotating shaft 3. The end of the second support arm 504 is movably connected to a roller 505. A pull rod 506 is hinged on the second support arm 504. The pull rod 506 is movably connected to the pull rod support plate 109 provided on the transmission base 1 through a pin to realize the folding and unfolding action of the folding support arm.

[0027] like Figure 5 and Figure 6 As shown, during operation, motor module 2 drives gear shaft 201 to rotate, gear shaft 201 drives sector gear 4 to rotate, sector gear 4 drives rotating shaft 3 to rotate, and rotating shaft 3 drives support arm module 5 to rotate, thereby realizing the retraction and extension of roller 505. When sector gear 4 rotates to contact one end of arc-shaped limit block 6, it reaches the maximum unfolding angle; when sector gear 4 rotates to contact the other end of arc-shaped limit block 6, it reaches the maximum folding angle. Throughout the process, the folding components (first support arm 503, second support arm 504, and pull rod 506) do not participate in the limiting, avoiding the risk of deformation and improving control accuracy and safety.

[0028] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An auxiliary wheel rotation limiting mechanism based on gear limiting, characterized in that, The system includes a transmission base (1) with a gear mounting groove (101), a motor module (2) is provided on the outer bottom surface of the transmission base (1), a gear shaft (201) is provided on the motor module (2), the gear shaft (201) passes through the transmission base (1) and extends into the gear mounting groove (101); a shaft limiting groove (102) is provided on the bottom wall of the gear mounting groove (101), one end of the shaft (3) is movably fitted in the shaft limiting groove (102), and the other end of the shaft (3) is connected to the support arm module ( 5) Connection; A sector gear (4) is sleeved on the rotating shaft (3), and the tooth surface of the sector gear (4) meshes with the gear shaft (201) for transmission; A first positioning post (103) is provided on the bottom wall of the gear mounting groove (101), and a positioning hole (601) is provided on the arc-shaped limiting block (6). The arc-shaped limiting block (6) is sleeved with the first positioning post (103) through the positioning hole (601), and the two ends of the arc-shaped limiting block (6) constitute the clockwise and counterclockwise rotation limiting blocks of the sector gear (4).

2. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 1, characterized in that, The transmission base (1) also includes a base cover plate (104), which can seal the gear mounting groove (101). A shaft through hole (105) is provided on the base cover plate (104), and one end of the shaft (3) passes through the shaft through hole (105) and is fixedly connected to the support arm module (5).

3. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 2, characterized in that, The inner wall of the base cover plate (104) is provided with a bearing groove (106), and a bearing (107) is embedded in the bearing groove (106). The inner ring of the bearing (107) is sleeved with the rotating shaft (3).

4. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 2, characterized in that, The inner wall of the base cover plate (104) is provided with a second positioning post (108), and both the first positioning post (103) and the second positioning post (108) are inserted into the positioning hole (601).

5. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 4, characterized in that, The arc-shaped limiting block (6) has three positioning holes (601), and there are three of each of the first positioning post (103) and the second positioning post (108).

6. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 1, characterized in that, The arm module (5) includes a rotating shaft connection part (501), which is provided with an anti-rotation groove (502) and the anti-rotation groove (502) is sleeved with the end of the rotating shaft (3).

7. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 6, characterized in that, The anti-rotation groove (502) is in the shape of a straight line, and the end of the rotating shaft (3) is in the shape of a straight line that matches the anti-rotation groove (502).

8. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 6, characterized in that, The arm module (5) is a folding arm, including a first arm (503) and a second arm (504) that are hinged to each other. The anti-rotation groove (502) of the first arm (503) is sleeved with the end of the rotating shaft (3). The end of the second arm (504) is movably connected to a roller (505). A pull rod (506) is hinged on the second arm (504). The pull rod (506) is movably connected to the pull rod support plate (109) provided on the transmission base (1) through a pin.

9. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 1, characterized in that, The arc of the arc-shaped limiting block (6) is 180°, and the arc of the sector gear (4) is 90°.

10. The auxiliary wheel rotation limiting mechanism based on gear limiting according to claim 1, characterized in that, The motor module (2) is a worm gear motor with a speed reduction function.

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