A driving wheel rotation structure

Abstract

The application discloses a driving wheel rotating structure, which comprises a rotating mechanism, a mounting plate, a rotating support assembly and a roller assembly, wherein the rotating mechanism comprises a rotating shaft, a gear and a rotating disc, the gear is fixedly connected to the end of the rotating shaft, and the rotating disc is provided with a gear ring which is engaged with the gear; the upper surface of the mounting plate is provided with a second bearing, the lower surface of the mounting plate is provided with a third bearing, and the rotating shaft penetrates through the second bearing and the third bearing; the rotating support assembly comprises a first support seat and at least one first bearing arranged in the first support seat, and the first support seat is located between the mounting plate and the rotating disc; and the roller assembly is fixedly connected with the rotating disc and rotatably connected with the rotating support assembly. The second bearing and the third bearing are arranged to form a double support structure of the rotating shaft, thereby improving the stability of the rotating shaft and avoiding the driving wheel from being stuck during the steering process.

Description

Technical Field

[0001] This invention relates to the field of drive wheel technology, and more specifically to a drive wheel rotation structure. Background Technology

[0002] In floor scrubbers, sweepers, and other small indoor power equipment, a rotating mechanism is usually installed on the drive wheel assembly to achieve steering control of the drive wheels. By rotating the shaft, the gear meshes with the gear ring, thereby driving the drive wheel assembly to rotate around its steering axis and realizing the steering function of the equipment.

[0003] The current conventional structure controls the rotation of the drive wheel through a single rotating shaft. The rotating shaft relies on a single point of support, such as a mounting plate or support base, to ensure smooth rotation. However, existing mounting plates only have one support point. When the rotating shaft is subjected to lateral loads during transmission, its stability is poor due to relying on only a single support point. This can easily lead to tilting, swaying, or radial displacement, causing the rotating shaft to contact the inner wall of the mounting plate or support base, resulting in uneven rotation or even jamming. Summary of the Invention

[0004] To overcome the above shortcomings, the purpose of this invention is to provide a drive wheel rotation structure. By setting a second bearing and a third bearing in the second and third support seats of the mounting plate respectively, the rotating shaft forms a double support structure, thereby improving the support stability of the rotating shaft and preventing the rotating shaft from rubbing against the inner wall of the second support seat under stress, thus preventing the drive wheel from getting stuck during steering.

[0005] Technical solution: This invention discloses a drive wheel rotation structure, comprising: A rotating mechanism, comprising a rotating shaft, a gear, and a rotating disk, wherein the gear is fixedly connected to the end of the rotating shaft, and the rotating disk has a gear ring that meshes with the gear; The mounting plate has a second bearing on its upper surface and a third bearing on its lower surface, and the rotating shaft passes through the second bearing and the third bearing. A rotating support assembly, the rotating support assembly including a first support base and at least one first bearing disposed in the first support base, the first support base being located between the mounting plate and the rotating disk; A roller assembly, which is fixedly connected to the rotating disk and rotatably connected to the rotating support assembly.

[0006] Furthermore, the upper surface of the mounting plate has a second support for accommodating the second bearing, and the lower surface of the mounting plate has a third support for accommodating the third bearing. Furthermore, the roller assembly includes a connecting plate and a drive wheel, the connecting plate being fixedly connected to the side of the rotating disk opposite to the mounting disk.

[0007] Furthermore, a pad is provided between the connecting plate and the drive wheel. The pad and the connecting plate are detachably connected by fasteners. The fasteners pass through the pad towards the connecting plate to fix them to the connecting plate.

[0008] Furthermore, the connecting plate has a boss on the end face opposite to the drive wheel, and the first bearing is sleeved on the outside of the boss.

[0009] Furthermore, two first bearings are sleeved on the outer side of the boss along its axial direction.

[0010] Furthermore, the gear ring has teeth located only on one side of the gear ring in the circumferential direction, so that the gear and the teeth mesh.

[0011] Furthermore, the rotating shaft is provided with two annular grooves, and two retaining springs are embedded in the annular grooves to prevent the second bearing and the third bearing from disengaging along the axial direction of the rotating shaft.

[0012] Furthermore, the second bearing and the third bearing have an axial spacing, thereby forming a double support point for the rotating shaft.

[0013] Furthermore, the rotating support assembly also includes a bearing cover plate fixedly connected to the boss, so that the first bearing is clamped between the bearing cover plate and the connecting plate.

[0014] The beneficial effects of this invention are as follows: This invention provides a second bearing and a third bearing within the second and third support seats of the mounting plate, respectively, with the two bearings spaced apart axially along the rotating shaft. This creates a double-support point structure on the rotating shaft, supporting it with two bearings. This improves the radial stability and resistance to eccentric loads of the rotating shaft, preventing tilting or swaying during transmission. It also ensures good coaxiality of the rotating shaft during rotation, preventing contact or rubbing between the rotating shaft and the inner wall of the support seat, reducing frictional resistance and structural wear, and preventing the drive wheel from jamming or seizing during steering. Attached Figure Description

[0015] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and are not intended to specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances. In the drawings: Fig. 1 This is an exploded view of the drive wheel rotation structure described in this invention; Fig. 2 This is a schematic diagram of the drive wheel rotation structure described in this invention; Fig. 3 This is a schematic diagram of the drive wheel rotation structure described in this invention.

[0016] In the diagram: 1. Connecting plate; 11. First support seat; 12. First bearing; 13. Boss; 14. Bearing cover plate; 2. Drive wheel; 3. Mounting plate; 31. Second support seat; 32. Third support seat; 33. Second bearing; 34. Third bearing; 41. Rotating shaft; 411. Annular groove; 412. Snap ring; 42. Rotating disk; 421. Gear ring; 422. Tooth; 43. Gear; 5. Pad plate. Detailed Implementation

[0017] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0018] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0019] like Figs. 1 to 3 As shown, the present invention discloses a drive wheel rotation structure, comprising: A rotating mechanism, comprising a rotating shaft 41, a gear 43, and a rotating disk 42, wherein the gear 43 is fixedly connected to the end of the rotating shaft 41, and the rotating disk 42 has a gear ring 421 that meshes with the gear 43; Mounting plate 3, the upper surface of which is provided with a second bearing 33, the lower surface of which is provided with a third bearing 34, the rotating shaft 41 passes through the second bearing 33 and the third bearing 34; A rotating support assembly, the rotating support assembly including a first support base 11 and at least one first bearing 12 disposed in the first support base 11, the first support base 11 being located between the mounting plate 3 and the rotating disk 42; A roller assembly is fixedly connected to the rotating disk 42 and rotatably connected to the rotating support assembly.

[0020] Furthermore, the upper surface of the mounting plate 3 has a second support 31 for accommodating the second bearing 33, and the lower surface of the mounting plate 3 has a third support 32 for accommodating the third bearing 34.

[0021] With the above structure, the present invention forms an integrated steering drive structure by setting up a rotating mechanism, mounting plate 3, rotating support assembly, and roller assembly. The rotating shaft 41 is supported in the second support seat 31 and third support seat 32 of the mounting plate 3 by the second bearing 33 and the third bearing 34 respectively, allowing the rotating shaft 41 to rotate stably relative to the mounting plate 3. Simultaneously, the upper and lower second bearings 33 and third bearing 34 provide double-point support for the rotating shaft 41, thereby improving the rotational stability of the rotating shaft 41, reducing sway, and preventing jamming during rotation. A gear 43 is fixedly connected to the end of the rotating shaft 41, and the gear 43 meshes with the gear ring 421 on the rotating disk 42. When the rotating shaft 41 rotates under external drive, it drives the gear 43 to rotate, and the meshing action between the gear 43 and the gear ring 421 drives the rotating disk 42 to rotate.

[0022] In addition, the rotating disk 42 is fixedly connected to the roller assembly, and the roller assembly is rotatably connected to the first support base 11 through the first bearing 12. The first support base 11 is disposed between the mounting plate 3 and the rotating disk 42, so that the rotating disk 42 can rotate relative to the first support base 11 under the drive of the gear 43, and further drive the roller assembly to rotate around the axis of the first support base 11.

[0023] Specifically, this application provides a second support base 31 and a third support base 32, which are coaxially arranged on the mounting plate 3, and respectively provides a second bearing 33 and a third bearing 34, forming a double bearing support structure for the rotating shaft 41. This makes the rotating shaft 41 more stable and capable of carrying load when transmitting driving force. At the same time, the rotation drive is achieved through the meshing structure of the gear 43 and the gear ring 421 of the rotating disk 42, which is compact and reliable in transmission. Furthermore, the first support base 11 and the first bearing 12 support the roller assembly, making the roller assembly more evenly stressed during the turning process, thereby effectively reducing the phenomenon of rotational jamming and improving the smoothness of the rotation of the drive wheel 2 and the stability of use.

[0024] The roller assembly includes a connecting plate 1 and a drive wheel 2. The connecting plate 1 is fixedly connected to the side of the rotating disk 42 away from the mounting plate 3. The drive wheel 2 is mounted on the connecting plate 1 through a connector and is rotatably connected to the first support seat 11 through the first bearing 12, thereby realizing that the roller assembly rotates synchronously with the rotating disk 42.

[0025] A pad 5 is provided between the connecting plate 1 and the drive wheel 2. The pad 5 serves as a transition between the drive wheel 2 and the connecting plate 1. The pad 5 is detachably connected to the connecting plate 1 by fasteners. Since the structure above the drive wheel 2 is compact, it is difficult to install fasteners to fix the drive wheel 2. Therefore, the drive wheel 2 is pre-fastened to the pad 5. The fasteners pass through the pad 5 towards the connecting plate 1 and are then fixedly connected to the connecting plate 1, thereby fixing the pad 5 onto the connecting plate 1 and completing the installation of the drive wheel 2.

[0026] Since the pad 5 is detachably connected to the connecting plate 1 via fasteners, when the drive wheel 2 needs to be maintained, replaced, or its installation position adjusted, the pad 5 can be separated from the connecting plate 1 simply by removing the fasteners, thus facilitating the disassembly and assembly of the drive wheel 2 and improving the convenience of assembly and maintenance.

[0027] A boss 13 is also provided on the end face of the connecting plate 1 facing away from the drive wheel 2. The boss 13 protrudes from the upper end face of the connecting plate 1, that is, the boss 13 is located on the end face facing away from the drive wheel 2. The first bearing 12 is sleeved on the outside of the boss 13, so that the first bearing 12 can be limited by the boss 13 as a mounting and positioning structure.

[0028] Specifically, the outer circumferential surface of the boss 13 mates with the inner ring of the first bearing 12, thereby radially positioning and supporting the first bearing 12, enabling the first bearing 12 to be stably mounted on the connecting plate 1. When the drive wheel 2 rotates, the smooth rotation of the connecting plate 1 relative to the rotation support assembly is achieved through the cooperation between the first bearing 12 and the boss 13. Preferably, two first bearings 12 are sleeved on the outer side of the boss 13 along its axial direction, and the two first bearings 12 are spaced apart along the axis of the boss 13. By axially arranging two first bearings 12 on the outer side of the boss 13, this application creates a double bearing support structure for the connecting plate 1 during rotation, thereby improving the stability of the drive wheel 2 during rotation. In addition, the arrangement of two first bearings 12 can also improve the load-bearing capacity of the overall structure, reduce the load borne by a single bearing, reduce bearing wear, and extend the service life of the bearings and the rotating structure of the drive wheel 2.

[0029] Preferably, the outer periphery of the gear ring 421 is provided with teeth 422. The teeth 422 are only located on one side of the circumferential region of the gear ring 421, meaning the teeth 422 are only partially present on the gear ring 421, rather than being present throughout the entire circumference. The shape of the gear ring 421 is an arc-shaped profile. The gear 43 follows this arc-shaped profile as its motion trajectory. The gear ring 421 includes a first arc segment with a larger inner diameter and a second arc segment with a smaller inner diameter. The teeth 422 are only located on one of the first and second arc segments. This is to prevent the gear 43 from jamming when simultaneously meshing with the first and second arc segments due to machining errors. When the rotating shaft 41 rotates, the gear 43 meshes with the teeth 422. When the rotating shaft 41 drives the gear 43 to rotate, the meshing action between the gear 43 and the teeth 422 drives the rotating disk 42 containing the gear ring 421 to rotate. When gear 43 rotates to the end position of tooth 422, gear 43 and gear ring 421 disengage, thereby limiting the rotation range of rotating disk 42.

[0030] The outer circumference of the rotating shaft 41 is also provided with two annular grooves 411 spaced apart along its axial direction. Two retaining springs 412 are respectively embedded in the corresponding annular grooves 411. The second bearing 33 and the third bearing 34 are sleeved on the outside of the rotating shaft 41 and are respectively located between the two retaining springs 412 and abut against the retaining springs 412. Through the cooperation of the retaining springs 412 and the annular grooves 411, the second bearing 33 and the third bearing 34 are axially limited, thereby preventing the second bearing 33 and the third bearing 34 from coming out along the axial direction of the rotating shaft 41 and ensuring the stability of the bearings at the installation position.

[0031] Furthermore, the second bearing 33 and the third bearing 34 are spaced apart along the axial direction of the rotating shaft 41, forming a predetermined axial distance between them, thereby creating two separate support points on the rotating shaft 41. When the rotating shaft 41 rotates, the second bearing 33 and the third bearing 34 jointly support the rotating shaft 41, making the rotating shaft 41 form a stable two-point support structure.

[0032] With the above structure, the second bearing 33 and the third bearing 34 are installed inside the second support base 31 and are located on the upper and lower sides of the mounting plate 3. The rotating shaft 41 passes through the second bearing 33 and the third bearing 34. The inner rings of the rotating shaft 41 and the second bearing 33 and the third bearing 34 rotate synchronously. The rolling of the balls inside the bearings realizes the relative rotation between the rotating shaft 41 and the second support base 31, thereby converting sliding friction into rolling friction and reducing rotational resistance. Under the support of the second bearing 33 and the third bearing 34, the rotating shaft 41 can maintain a stable rotational posture during rotation, keeping a predetermined gap between the outer circumferential surface of the rotating shaft 41 and the inner wall of the second support base 31. This avoids direct contact or rubbing between the rotating shaft 41 and the inner wall of the second support base 31, reducing wear and jamming, and improving the smoothness and reliability of the rotating mechanism.

[0033] The rotating shaft 41 extends along an axis. The axis of the rotating shaft 41 is parallel to, but does not coincide with, the axis of the first bearing 12. Specifically, the axis of the first bearing 12 is the rotation axis of the connecting plate 1 and the drive wheel 2, while the axis of the rotating shaft 41 is arranged parallel to the axis of the first bearing 12. This allows the gear 43 on the rotating shaft 41 to form a stable meshing relationship with the gear ring 421 on the rotating disk 42. Through the meshing transmission between the gear 43 and the gear ring 421, the rotating disk 42 is driven to rotate around the axis of the first bearing 12, thereby driving the connecting plate 1 and the drive wheel 2 to achieve steering motion.

[0034] It is understandable that the rotating disk 42 is fixedly connected to the connecting plate 1, and rotates with the connecting plate 1 and the drive wheel 2 around the axis of the first bearing 12. The arc-shaped structure of the gear ring 421 extends around the axis of the first bearing 12, so the gear 43 can always maintain a stable meshing radius during the meshing process with the gear ring 421, thereby ensuring the smoothness of the transmission process.

[0035] Preferably, the rotating support assembly further includes a bearing cover plate 14 fixedly connected to the boss 13. The first bearing 12 is clamped between the bearing cover plate 14 and the connecting plate 1, thereby ensuring stable support for the first bearing 12 while preventing axial displacement or loosening during the rotation of the roller assembly. By providing the bearing cover plate 14, the rotational accuracy of the roller assembly and the stability of the overall structure can be further improved, ensuring that the drive wheel 2 has smooth and reliable rotational performance during rotation.

[0036] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A drive wheel rotation structure, characterized in that, include: A rotating mechanism, comprising a rotating shaft, a gear, and a rotating disk, wherein the gear is fixedly connected to the end of the rotating shaft, and the rotating disk has a gear ring that meshes with the gear; The mounting plate has a second bearing on its upper surface and a third bearing on its lower surface, and the rotating shaft passes through the second bearing and the third bearing. A rotating support assembly, the rotating support assembly including a first support base and at least one first bearing disposed in the first support base, the first support base being located between the mounting plate and the rotating disk; A roller assembly, which is fixedly connected to the rotating disk and rotatably connected to the rotating support assembly.

2. The drive wheel rotation structure according to claim 1, characterized in that, The upper surface of the mounting plate has a second support for accommodating the second bearing, and the lower surface of the mounting plate has a third support for accommodating the third bearing.

3. The drive wheel rotation structure according to claim 1, characterized in that, The roller assembly includes a connecting plate and a drive wheel, with the connecting plate fixedly connected to the side of the rotating disk opposite to the mounting disk.

4. The drive wheel rotation structure according to claim 3, characterized in that, A pad is also provided between the connecting plate and the drive wheel. The pad and the connecting plate are detachably connected by fasteners. The fasteners pass through the pad towards the connecting plate to fix them to the connecting plate.

5. The drive wheel rotation structure according to claim 3, characterized in that, The connecting plate has a boss on the end face opposite to the drive wheel, and the first bearing is sleeved on the outside of the boss.

6. The drive wheel rotation structure according to claim 5, characterized in that, Two first bearings are fitted along the axial direction on the outer side of the boss.

7. The drive wheel rotation structure according to claim 1, characterized in that, The gear ring has teeth located only on one side of the gear ring in the circumferential direction, so that the gear and the teeth mesh.

8. The drive wheel rotation structure according to claim 1, characterized in that, The rotating shaft is provided with two annular grooves, and two retaining springs are embedded in the annular grooves to prevent the second bearing and the third bearing from disengaging along the axial direction of the rotating shaft.

9. The drive wheel rotation structure according to claim 1, characterized in that, The second bearing and the third bearing have an axial spacing, thereby forming a double support point for the rotating shaft.

10. The drive wheel rotation structure according to claim 5, characterized in that, The rotating support assembly also includes a bearing cover plate fixedly connected to the boss, so that the first bearing is clamped between the bearing cover plate and the connecting plate.

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