Bearing fixing structure and wheel assembly including the same

Abstract

The present invention relates to a bearing fixing structure and a wheel assembly including the structure, wherein the bearing fixing structure includes a wheel axle, a first bearing connected to the wheel axle, and a first clamping ring, and a dustproof structure is also connected to the outer side of the first wheel axle, and the dustproof device has a part that wraps the first bearing and / or the first clamping ring. The present invention provides a first support pad and a second support pad, and the first support pad and the second support pad both have a part that extends and can wrap the first bearing inside, thereby preventing the first bearing from being affected by dust or grass clippings, and effectively improving the service life of the first bearing.

Description

Technical Field

[0001] The invention relates to the technical field of lawn mower equipment, and in particular to a bearing fixing structure and a wheel assembly comprising the structure. Background Art

[0002] A lawn mower is also called a weed cutter, lawn mower, lawn trimmer, etc. A lawn mower is a mechanical tool used to trim lawns and vegetation. As an important component of a lawn mower, the wheel assembly is responsible for the movement of the lawn mower. At present, the traditional lawn mower structure has a wheel axle that moves up and down, so the wheel assembly will bring grass clippings and dust into the structure of the wheel assembly during the up and down movement, which will cause the internal structure of the wheel assembly to get stuck, thereby affecting the service life of the internal structure of the wheel assembly and reducing the working efficiency of the lawn mower. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a bearing fixing structure and a wheel assembly including the structure, so as to solve one or more problems in the prior art.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A bearing fixing structure, the bearing fixing structure includes an axle and a first bearing and a first retaining ring connected to the first axle. A dustproof structure is also connected to the outside of the first axle. The dustproof device has a part that wraps the first bearing and / or the first retaining ring.

[0006] Furthermore, the dustproof structure includes a first support pad and a second support pad, the first support pad is arranged at the first end of the first bearing, the second support pad is arranged at the second end of the first bearing, the first support pad has a first axle mounting hole for the first axle to pass through, and a portion of the first support pad extends in a direction close to the first retaining ring.

[0007] Furthermore, the dustproof structure includes a third support pad, which is arranged at the second end of the first bearing, and a part of the third support pad extends in a direction away from the first retaining ring.

[0008] Furthermore, a shock-absorbing pad is connected to the outer side of the first wheel axle near the first clamping ring, and the shock-absorbing pad includes a shock-absorbing pad body, and a second wheel axle mounting hole and at least one first bulge are opened on the shock-absorbing pad body.

[0009] Furthermore, the first bulge is arranged on the upper surface and / or lower surface of the shock-absorbing pad body.

[0010] Furthermore, the first bulge has a hollow structure inside and extends along the axial direction of the shock-absorbing pad body.

[0011] Correspondingly, the present invention also provides a wheel assembly, which includes the above-mentioned bearing fixing structure, wheel fixing seat and wheel body, the first wheel axle passes through the bearing fixing structure and the wheel fixing seat in sequence and is connected to the wheel body, the first clamping ring is movably arranged in the wheel fixing seat, the bracket is rotatably connected to the wheel fixing seat, the sensor is arranged at one end of the bracket away from the wheel fixing seat, and a magnetic member is arranged at the other end of the bracket away from the wheel fixing seat, the first clamping ring contacts the bracket and can trigger the sensor and realize detection when the bracket rotates to a first position relative to the wheel fixing seat.

[0012] Furthermore, a metal component mounting seat is provided on the wheel fixing seat at an end close to the bracket away from the wheel fixing seat, and a metal component that can be magnetically connected to the magnetic component is connected to the metal component mounting seat.

[0013] Furthermore, the bracket includes a bracket body, a shaft mounting portion is arranged in the bracket body, a notch is opened at one end of the bracket body, a magnetic component mounting portion is arranged at the other end of the bracket body, and the magnetic component is installed inside the magnetic component mounting portion.

[0014] Furthermore, the shaft mounting portion occupies 1 / 3 to 1 / 5 of the total length of the bracket body.

[0015] Furthermore, a first soft rubber is wrapped on the outer side of the first clamping ring, and at least one first bulge is arranged on the outer side of the first soft rubber; and a second soft rubber is also connected to the outer side of the bearing fixing structure and on the side of the wheel fixing seat close to the wheel body.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0017] The present invention provides a first support pad and a second support pad, both of which are partially extended and can wrap the first bearing, thereby preventing the first bearing from being affected by dust or grass clippings, thereby effectively increasing the service life of the first bearing.

[0018] Furthermore, the first bulge in the shock-absorbing pad is a hollow structure, which can prolong the contact time between the second supporting pad and the shock-absorbing pad when vibration occurs, thereby achieving a shock-absorbing effect.

[0019] Furthermore, the bracket is rotatably arranged on the wheel fixing seat, and the second clamping ring and the bracket are in a separated state when the detection is not triggered, so that when the wheel body rotates, it will not affect the bracket, thereby avoiding friction between the bracket and the wheel body during rotation or movement, thereby avoiding wear of structural parts caused by friction, and effectively improving the service life of the wheel body.

[0020] Furthermore, a metal component mounting seat is provided on the wheel fixing seat near the end of the bracket away from the wheel fixing seat, and a metal component that can attract the magnetic component is connected to the metal component mounting seat. By magnetically connecting the metal component to the magnetic component, when the road surface on which the lawn mower is working is uneven and causes the lawn mower to bump, if the magnetic connection is not adopted, the bracket will swing up and down and trigger the sensor by mistake, thereby causing a false operation of the detection. When the metal component is magnetically connected to the magnetic component, it will further avoid causing the bracket to swing up and down, thereby avoiding false detection.

[0021] Furthermore, the shaft mounting portion occupies 1 / 3 to 1 / 5 of the total length of the bracket body, so that the rotation center of the bracket is offset, so that the sensor can be triggered by lifting the bracket a short distance, thereby improving detection efficiency.

[0022] Furthermore, by providing a second soft rubber, grass clippings and dust suspended in the air can be prevented from adhering to the surface of the wheel axle when the wheel body slides down. As the wheel axle rises, the grass clippings and dust will affect the rotation of the wheel axle. Failure to clean the dust and grass clippings for a long time may cause jamming. The second soft rubber will stretch with the axial movement of the wheel axle, effectively preventing the entry of dust and grass clippings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the partial structure of a bearing fixing structure in an embodiment of the present invention and a bearing fixing structure in a wheel assembly including the structure is shown.

[0024] Figure 2 A schematic structural diagram of a bearing fixing structure installed with a first support pad according to an embodiment of the present invention is shown.

[0025] Figure 3 A schematic structural diagram of a bearing fixing structure and a shock-absorbing pad in a wheel assembly including the structure is shown in an embodiment of the present invention.

[0026] Figure 4 A schematic diagram of the installation of a bearing fixing structure and a sensor in a wheel assembly including the structure according to an embodiment of the present invention is shown.

[0027] Figure 5 A structural schematic diagram of a bearing fixing structure according to an embodiment of the present invention and a wheel body in a wheel assembly including the same at a first viewing angle is shown.

[0028] Figure 6 A structural schematic diagram of a bearing fixing structure according to an embodiment of the present invention and a wheel body in a wheel assembly including the same at a second viewing angle is shown.

[0029] Figure 7 A structural schematic diagram of a bearing fixing structure and a wheel assembly including the structure according to an embodiment of the present invention is shown.

[0030] Figure 8A schematic structural diagram of a bearing fixing structure according to an embodiment of the present invention and a first soft rubber in a wheel assembly including the structure is shown.

[0031] Fig. 9 A schematic structural diagram of a bearing fixing structure according to a second embodiment of the present invention and a wheel fixing seat in a wheel assembly including the same is shown.

[0032] Fig.10 A schematic structural diagram of a bearing fixing structure according to a second embodiment of the present invention and a bracket in a wheel assembly including the same is shown.

[0033] Fig.11 A structural schematic diagram of a bearing fixing structure according to a second embodiment of the present invention and a bearing fixing structure in a wheel assembly including the same is shown.

[0034] Markings in the accompanying drawings: 1, wheel axle; 101, limiting part; 2, shaft sleeve; 3, wheel fixing seat; 300, fixing seat body; 301, first protrusion; 302, opening; 303, shaft hole; 304, second protrusion; 4, second clamping ring; 5, first soft rubber; 500, first soft rubber body; 501, second bulge; 6, rotating shaft; 7, bracket; 700, bracket body; 701, rotating shaft mounting part; 702, rotating shaft mounting hole; 703, notch; 704, magnetic part mounting part; 8, sensor; 9, magnetic part; 10, metal part; 11, Metal part mounting seat; 12. second soft rubber; 13. wheel body; 1300. first wheel shell; 1301. second wheel shell; 1302. pressure plate; 1303. third retaining ring; 1304. sealing member; 1305. second bearing; 14. first support pad; 1401. first wheel axle mounting hole; 15. first bearing; 16. second support pad; 17. shock-absorbing pad; 170. shock-absorbing pad body; 171. first bulge; 172. second wheel axle mounting hole; 18. first retaining ring; 19. shell; 20. sensor mounting seat; 21. third support pad. DETAILED DESCRIPTION

[0035] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the attached drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the attached drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0036] Embodiment 1:

[0037] Please refer to Figure 1The bearing fixing structure includes a first axle 1, a first bearing 15 connected to the first axle 1, and a first retaining ring 18. A dustproof structure is also connected to the outer side of the first axle 1. The dustproof device has a part that wraps the first bearing 15 and the first retaining ring 18.

[0038] For details, please continue to refer to Figure 1 The dustproof structure includes a first support pad 14 and a second support pad 16. The first support pad 14 is provided with a first end of the first bearing 15, and the second support pad 16 is provided with a second end of the first bearing 15. The first support pad 14 has a first axle mounting hole 1401 for the first axle 1 to pass through, and a portion of the first support pad 14 extends toward the direction close to the first collar 18. Specifically, in the bearing fixing structure described in the first embodiment, the first end refers to the upper end of the first bearing 15, and the second end refers to the lower end of the first bearing 15.

[0039] Furthermore, a limiting portion 101 is provided on the outer side of the first axle 1 . The limiting portion 101 protrudes along the outer side of the first axle 1 and is used to limit the installation position of the first clamping ring 18 , thereby playing a limiting role.

[0040] For further information, please refer to Figure 1 and Figure 2 The first support pad 14 extends 3 to 10 mm in the direction close to the first clamping ring 18. This extension can wrap the first bearing 15, the second support pad 16 and the first clamping ring 18 inside the first support pad 14. Dust or grass clippings are blocked outside the first clamping ring 18 under the first support pad 14, thereby preventing the first bearing 15 from being affected by grass clippings and dust, and effectively protecting the life of the first bearing 15.

[0041] Preferably, the first support pad 14 and the second support pad 16 are any one of plastic parts, metal parts or a mixture of metal and plastic parts.

[0042] For further information, please continue to refer to Figure 1 and Figure 3Since the first wheel axle 1 will slide up and down, each descent and reset of the wheel body 13 will cause vibration of the lawn mower. Therefore, a shock-absorbing pad 17 is also connected to the outer side of the first wheel axle 1 between the first collar 18 and the second support pad 16. The shock-absorbing pad 17 includes a shock-absorbing pad body 170. A second wheel axle mounting hole 172 is provided on the shock-absorbing pad body 170. At least one first bulge 171 is provided on the outer side of the shock-absorbing pad body 170. The first bulge 171 is a hollow structure. The first bulge 171 is arranged on the upper surface and the lower surface of the shock-absorbing pad 17. The interior of the first bulge 171 is a hollow structure and extends along the axial direction of the shock-absorbing pad body 170. Since the first bulge 171 is a hollow structure, the second support pad 16 will contact the first bulge 171 when vibration occurs. The contact time between the second support pad 16 and the shock-absorbing pad 17 is extended by the first bulge 171, thereby achieving a shock-absorbing effect.

[0043] Correspondingly, in other embodiments of the present invention, the first bulge 171 may also be disposed on the upper surface or the lower surface of the shock-absorbing pad body 170 , as long as the shock-absorbing effect can be achieved, and the present invention does not impose any further limitation on this.

[0044] Correspondingly, the present invention also provides a wheel assembly, which includes the above-mentioned bearing fixing structure, wheel fixing seat 3 and wheel body 13, the first wheel axle 1 sequentially passes through the bearing fixing structure, wheel fixing seat 3 and is connected to the wheel body 13, the shaft sleeve 2 is connected to the upper half of the wheel fixing seat 3 and the outer side of the first wheel axle 1, the second clamping ring 4 is movably arranged in the wheel fixing seat 3, the bracket 7 is rotatably connected to the wheel fixing seat 3, the sensor 8 is arranged at the end of the bracket 7 away from the wheel fixing seat 3, and the magnetic member 9 is arranged at the end of the bracket 7 away from the wheel fixing seat 3, the second clamping ring 4 contacts the bracket 7 and can trigger the sensor 8 and realize detection when the bracket 7 rotates to the first position relative to the wheel fixing seat 3.

[0045] For further information, please refer to Figure 1 and Figure 4 The wheel fixing seat 3 is fixed to the back of the shell 19 , and the sensor 8 is connected to the shell 19 through the sensor mounting seat 20 .

[0046] For further information, please refer to Figure 7 and Figure 8The second collar 4 is movably arranged inside the wheel fixing seat 3 through the first wheel axle 1, and the first soft rubber 5 is wrapped on the outside of the second collar 4. The first soft rubber 5 includes a first soft rubber body 500, and at least one second bulge 501 is arranged on the outside of the first soft rubber body 500. The second bulge 501 is used for shock absorption. The bracket 7 is rotatably connected to the wheel fixing seat 3, and the sensor 8 is arranged at the end of the bracket 7 away from the wheel fixing seat 3. The metal part 10 is arranged at the end of the bracket 7 away from the wheel fixing seat 3. The second collar 4 contacts the bracket 7 and can trigger the sensor 8 and realize detection when the bracket 7 rotates to the first position relative to the wheel fixing seat 3.

[0047] For further information, please continue to refer to Figure 7 and Figure 8 The wheel fixing seat 3 includes a fixing seat body 300 and a first protrusion 301 integrally connected to the fixing seat body 300. The center of the fixing seat body 300 has an axial hole 303 for the first wheel axle 1 to pass through. The bottom of the fixing seat body 300 has a second protrusion 304, and the second protrusion 304 is used to connect the second soft rubber 12. The first protrusion 301 is a cylindrical structure, and an opening 302 is opened on the cylindrical structure. On the left and right sides of the opening 302, holes for connecting the rotating shaft 6 are respectively opened on both sides of the first protrusion 301. The first protrusions 301 on the left and right sides of the opening 302 can effectively limit the movement of the bracket 7 in the left and right directions, thereby avoiding interference between the bracket 7 and other structures, thereby causing wear.

[0048] For further information, please continue to refer to Figure 7 and Figure 8 , near the end of the bracket 7 away from the wheel fixing seat 3, there is also a metal component mounting seat 11 on the wheel fixing seat 3, and a metal component 10 that can be magnetically connected to the magnetic component 9 is connected to the metal component mounting seat 11, and the metal component 10 can be inserted into the metal component mounting seat 11. Preferably, in the trigger detection mechanism described in the first embodiment, the metal component 10 is preferably a screw. By magnetically connecting the metal component 10 with the magnetic component 9, when the road surface on which the lawn mower works is uneven and causes the lawn mower to bump, if the magnetic connection is not used, the bracket 7 will swing up and down and trigger the sensor 8 by mistake, thereby causing a false operation of the detection. When the metal component 10 is magnetically connected to the magnetic component 9, it will further avoid causing the bracket 7 to swing up and down, thereby avoiding false detection.

[0049] Of course, in other embodiments of the present invention, the metal part 10 may also adopt any structure other than screws, such as a metal block or a metal rod made of metal material, as long as it can achieve magnetic connection with the magnetic part 9, and the present invention does not make further limitations on this.

[0050] For further information, please refer to Figure 7 and Fig.10The bracket 7 includes a bracket body 700, a shaft mounting portion 701 is arranged in the bracket body 700, a shaft mounting hole 702 is opened on the shaft mounting portion 701, the shaft 6 is installed in the shaft mounting hole 702, both ends of the shaft 6 extend out of the shaft mounting portion 701 and are connected to the holes on both sides of the opening 302, a notch 703 is opened at one end of the bracket body 700, and the notch 703 is used to contact the first soft rubber 5 on the outer side of the second clamping ring 4, and a magnetic component mounting portion 704 is arranged at the other end of the bracket body 700, and the magnetic component 9 is installed inside the magnetic component mounting portion 704.

[0051] Furthermore, the shaft mounting portion 701 occupies 1 / 3 to 1 / 5 of the total length of the bracket body 700. This design ensures that the rotation center of the bracket 7 is not located at the center of the bracket body 700, but is offset to the center of the bracket body 700. By offsetting the rotation center, the bracket 7 only needs to be lifted a short distance to trigger the sensor 8, thereby realizing the detection of the lifting of the first wheel axle 1.

[0052] For further information, please refer to Figure 5 , Figure 6 and Figure 7 The wheel body 13 further includes a first wheel shell 1300 and a second wheel shell 1301 connected to each other. The first wheel shell 1300 and the second wheel shell 1301 are also connected to the first wheel shaft 1 respectively. A third collar 1303 and a pressing plate 1302 for fixing a second bearing 1305 are also provided on the first wheel shaft 1 between the first wheel shell 1300 and the second wheel shell 1301. The second bearing 1305 is connected to the first wheel shaft 1 and is located in the wheel body 13. In order to ensure the sealing of the wheel body 13, a sealing member 1304 is also provided on the second wheel shell 1301. The sealing member 1304 is preferably made of wool felt.

[0053] Please refer to Figure 7 , the specific working process of the present invention is as follows:

[0054] In a normal state, the bracket 7 is always magnetically connected to the metal part 10 under the influence of the magnetic part 9, and is in a tilted state. When the lawn mower bumps on the road, the wheel fixing seat 3 and the bracket 7 are lifted together with the lawn mower, and the second clamping ring 4 remains stationary relative to the first wheel axle 1. When the bracket 7 and the wheel fixing seat 3 are lifted to a certain height, the second clamping ring 4 and the first soft rubber 5 contact the notch 703 of the bracket 7 and drive the bracket 7 to rotate. When the end of the bracket 7 away from the wheel fixing seat 3 rotates to align with the sensor 8, the sensor detects a signal under the influence of the magnetic part 9, triggering the lifting detection of the lawn mower wheel body 13.

[0055] Embodiment 2:

[0056] The structure of the second embodiment is similar to that of the first embodiment, except that the dustproof structure further includes a third support pad 21. Fig.11 The third support pad 21 is arranged at the second end of the first bearing 15, and a portion of the third support pad 21 extends in a direction away from the first retaining ring 18. The extension enables the third support pad 21 to wrap the first bearing 15, and also prevent grass clippings and dust from entering the first bearing 15.

[0057] Correspondingly, the center of the third support pad 21 also has a hole through which the first axle 1 can pass. The diameter of the hole in the center of the third support pad 21 matches the clearance of the first axle 1. The clearance is small and can also prevent grass clippings and dust from entering.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A wheel assembly, characterized in that: It comprises a bearing fixing structure, a wheel fixing seat and a wheel body, wherein a first wheel axle passes through the bearing fixing structure and the wheel fixing seat in sequence and is connected to the wheel body, a first clamping ring is movably arranged in the wheel fixing seat, a bracket is rotatably connected to the wheel fixing seat, a sensor is arranged at one end of the bracket away from the wheel fixing seat, a magnetic member is arranged at one end of the bracket away from the wheel fixing seat, and the first clamping ring contacts the bracket and can trigger the sensor and realize detection when the bracket rotates to a first position relative to the wheel fixing seat; A first soft rubber is wrapped around the outer side of the first collar, and at least one first bulge is arranged on the outer side of the first soft rubber; a second soft rubber is also connected to the outer side of the bearing fixing structure and on the side of the wheel fixing seat close to the wheel body; The bearing fixing structure includes the first axle, a first bearing connected to the first axle, and a first clamping ring. A dustproof structure is also connected to the outer side of the first axle, and a part of the dustproof structure wraps the first bearing and / or the first clamping ring. The dustproof structure comprises a first support pad and a second support pad, the first support pad is arranged at the first end of the first bearing, the second support pad is arranged at the second end of the first bearing, the first support pad has a first axle mounting hole for the first axle to pass through, and a part of the first support pad extends in a direction close to the first clamping ring; The dustproof structure comprises a third support pad, the third support pad is arranged at the second end of the first bearing, and a part of the third support pad extends in a direction away from the first retaining ring; Near the first retaining ring, a shock-absorbing pad is also connected to the outer side of the first wheel axle, and the shock-absorbing pad includes a shock-absorbing pad body, on which a second wheel axle mounting hole and at least one first bulge are opened; the first bulge is arranged on the upper surface and / or lower surface of the shock-absorbing pad body; the interior of the first bulge is a hollow structure and extends along the axial direction of the shock-absorbing pad body.

2. The wheel assembly according to claim 1, characterized in that: A metal component mounting seat is also arranged on the wheel fixing seat at one end of the bracket away from the wheel fixing seat, and a metal component that can be magnetically connected to the magnetic component is connected to the metal component mounting seat.

3. The wheel assembly according to claim 2, characterized in that: The bracket includes a bracket body, a rotating shaft mounting portion is arranged in the bracket body, a notch is opened at one end of the bracket body, a magnetic component mounting portion is arranged at the other end of the bracket body, and the magnetic component is installed inside the magnetic component mounting portion.

4. The wheel assembly according to claim 3, characterized in that: The shaft mounting portion occupies 1 / 3 to 1 / 5 of the total length of the bracket body.

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