Hub structure for three-wheel tractor and three-wheel tractor
Through the improved wheel hub structure design, the use of oil nipple lubrication and adjustment of the tapered bearing clearance by the lock nut has solved the problems of easy damage and complex adjustment of the front wheel hub of traditional three-wheel tractors, and improved the load-bearing capacity and sealing performance.
Patent Information
- Application Number
- CN202423178395.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The front wheel hub structure of traditional three-wheel tractors is easily damaged under heavy load conditions, the bearing life is reduced, and the bearing clearance adjustment is complicated.
The design includes a hub shaft, bearing seat, tapered bearing and adjustment lock nut. Lubricating grease is injected through the grease nozzle, and the tapered bearing clearance is adjusted by rotating the adjustment lock nut. The sealing performance is improved through the sealing structure of the bolts and end cover.
Simplified bearing clearance adjustment improves the load-bearing capacity and lubrication performance of the front wheel hub, extends bearing life, and reduces the risk of contamination.
Smart Images
Figure CN223443217U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to agricultural machinery equipment technical field, especially a kind of wheel hub structure for three-wheel tractor and three-wheel tractor. BACKGROUND
[0002] The traditional three-wheel tractor's front wheel hub structure is mostly supported by ball bearing or double taper bearing back-to-back structure, when the three-wheel tractor is running under heavy load, the bending moment of the front wheel hub from the ground increases, the bearing stress increases, and the bearing is easy to be damaged and the service life is reduced, thereby affecting the normal operation of the three-wheel tractor wheel hub. Moreover, when adjusting the bearing gap, the bearing cover needs to be repeatedly disassembled and assembled for adjustment, and the adjustment process is complex.
[0003] Therefore, it is necessary to develop a wheel hub structure for three-wheel tractor to overcome the above technical problems. UTILITY MODEL CONTENTS
[0004] The utility model solves the technical problem to provide a kind of wheel hub structure for three-wheel tractor and three-wheel tractor, effectively overcome the defects of prior art.
[0005] The technical scheme for solving the above technical problem of the utility model is as follows:
[0006] A kind of wheel hub structure for three-wheel tractor, including wheel hub axle, cylindrical bearing seat, two groups of taper bearing and adjusting lock nut, the bearing seat is coaxially sleeved on the wheel hub axle, the outer ring of two groups of taper bearings is respectively fixed on the inner wall of the bearing seat two ends, and the inner ring is respectively installed on the two ends of the wheel hub axle, one end of the bearing seat is provided with circular ring first end cover, the first end cover is rotatably sealed with the corresponding end of the wheel hub axle, one end of the bearing seat is provided with circular ring second end cover, the adjusting lock nut is screwed on the other end of the wheel hub axle, and is coaxially through the second end cover, and is in contact with the inner ring of the taper bearing of the corresponding end, the adjusting lock nut is rotatably sealed with the second end cover, and the oil nozzle is arranged on the side wall of the bearing seat corresponding to the two groups of taper bearings.
[0007] On the basis of the above technical scheme, the utility model can also be improved as follows.
[0008] Further, a plurality of bolts are uniformly and spacedly arranged on the outer edge of the first end cover and the second end cover, and the bolts are screw-connected with the screw holes matched with the end of the bearing seat.
[0009] Further, a circular ring shoulder is coaxially arranged on one end of the wheel hub axle, the inner ring of the first end cover is in contact with the shoulder, a first oil seal is embedded in the inner ring of the first end cover and in sealing contact with the shoulder, and the end of the inner ring of the taper bearing located at one end of the wheel hub axle is in contact with the shoulder.
[0010] Further, the middle section of the bearing seat side wall is provided with a pressure relief port, and the pressure relief port is provided with a bleeder screw.
[0011] Further, the inner wall of the bearing seat is coaxially provided with a convex ring at both ends, and the outer rings of the two sets of tapered bearings are respectively arranged at the ends of the two convex rings away from each other.
[0012] Further, the outer rings of the two sets of tapered bearings define a first oil injection cavity and a second oil injection cavity between the first end cover and the second end cover, and the oil nozzle is arranged at the position of the first oil injection cavity and the second oil injection cavity.
[0013] Further, the adjusting lock nut comprises a circular nut body, one end of the nut body is provided with an adjusting disc surface with a larger diameter, the other end of the nut body is provided with a cylindrical extension, the extension of the nut body is in abutment with the inner ring of the tapered bearing at the corresponding end, and the inner ring of the second end cover is embedded with a second oil seal in sealing contact with the adjusting lock nut.
[0014] Further, one end of the hub shaft is fixed with a fork arm, and the fork arm is provided with a locking structure for locking the adjusting disc surface.
[0015] Further, the outer edge of the adjusting disc surface is circumferentially spaced apart by a plurality of square grooves, the locking structure is a locking screw screwed on the fork arm, and the locking screw can be screwed into a corresponding square groove in the current position or screwed out of the square groove.
[0016] The beneficial effects of the utility model are: simple and reasonable structure design, optimized bearing gap adjustment mode, improved three-wheeled tractor front wheel hub bearing capacity, optimized hub bearing lubrication performance and sealing performance, and assembly.
[0017] A three-wheeled tractor is also provided, comprising a hub structure for the three-wheeled tractor. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a sectional view of the hub structure for the three-wheeled tractor of the utility model;
[0019] Figure 2 is a side view of the hub structure for the three-wheeled tractor of the utility model.
[0020] In the drawings, the components represented by each reference number are listed as follows:
[0021] 1, hub shaft; 2, bearing seat; 3, tapered bearing; 4, adjusting lock nut; 5, bolt; 11, shoulder; 21, first end cover; 22, second end cover; 23, oil nozzle; 24, air release screw; 25, convex ring; 41, nut body; 61, first oil seal; 62, second oil seal; 411, adjusting disc surface; 412, extension; 4111, square groove. DETAILED DESCRIPTION
[0022] The principles and characteristics of the present application are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present application and are not intended to limit the scope of the present application.
[0023] Example 1
[0024] As shown in Figure 1 and 2 , the hub structure for a three-wheeled tractor of the present embodiment includes a hub shaft 1, a cylindrical bearing seat 2, two groups of tapered bearings 3 and an adjusting lock nut 4. The bearing seat 2 is coaxially sleeved on the outside of the hub shaft 1, the outer rings of the two groups of tapered bearings 3 are respectively coaxially fixed to the inner walls of the two ends of the bearing seat 2, and the inner rings are respectively installed on the two ends of the hub shaft 1. One end of the bearing seat 2 is provided with a circular ring-shaped first end cover 21, the first end cover 21 is rotationally sealed and assembled with the corresponding end of the hub shaft 1. One end of the bearing seat 2 is provided with a circular ring-shaped second end cover 22, the adjusting lock nut 4 is threadedly screwed onto the other end of the hub shaft 1, coaxially passes through the second end cover 22, and abuts against the inner ring of the tapered bearing 3 at the corresponding end. The adjusting lock nut 4 is rotationally sealed and assembled with the second end cover 22. The side wall of the bearing seat 2 is provided with an oil nozzle 23 corresponding to the position of the two groups of tapered bearings 3.
[0025] The hub structure of the three-wheeled tractor of the present embodiment injects lubricating grease into the bearing seat 2 through the oil nozzle 23 to lubricate the tapered bearings 3 located at the two ends of the hub shaft 1. When the grease is injected, the grease can fully fill the tapered bearings 3, ensuring the lubrication effect of the tapered bearings 3. After the hub assembly is installed, the clearance of the tapered bearings 3 can be adjusted by rotating the adjusting lock nut 4. When adjusted to the appropriate position, the adjusting lock nut 4 can be locked to ensure that the clearance between the inner and outer rings of the tapered bearings 3 remains stable, thereby better improving the service life of the tapered bearings 3 and ensuring the free rolling of the hub. When the clearance of the tapered bearings 3 needs to be adjusted again, the bearing cover (first end cover 21 and second end cover 22) does not need to be disassembled. First, the locking state of the adjusting lock nut 4 is released, and then the adjusting lock nut 4 is rotated to detect whether the bearing clearance is within the required range, greatly saving the bearing clearance adjustment time and reducing the risk of contamination in the hub cavity. Overall, the structure is simple and reasonable, the bearing clearance adjustment method is optimized, the load carrying capacity of the front wheel hub of the three-wheeled tractor is improved, and the lubrication performance and sealing performance of the hub bearing and the assembly are optimized.
[0026] In the embodiment, a plurality of bolts 5 are arranged in the outer edge of the first end cover 21 and the second end cover 22 in a circumferential direction at uniform intervals, and the bolts 5 are threadedly connected with the screw holes matched with the end portions of the bearing seat 2. More specifically, the through holes are arranged in the outer edge of the first end cover 21 and the second end cover 22 in a circumferential direction at uniform intervals, and a plurality of bolt holes (screw holes) are arranged in the end portions of the bearing seat 2 in a circumferential direction at uniform intervals, and the bolts 5 passing through the through holes of the first end cover 21 and the second end cover 22 are threadedly connected with the bolt holes in the end portions of the bearing seat 2. In the embodiment, the outer edge of the first end cover 21 and the second end cover 22 on the side close to each other is provided with a stepped recess, and the end portions of the bearing seat 2 are embedded in the stepped recess, which can improve the sealing performance of the assembly to a certain extent, and the sealing ring can be arranged between the two to further improve the sealing performance.
[0027] As a preferred embodiment, the hub shaft 1 is coaxially provided with a circular annular shoulder 11 at one end, the inner ring of the first end cover 21 is in contact with the shoulder 11, the first oil seal 61 is embedded in the inner ring of the first end cover 21 and is in sealing contact with the shoulder 11, the end portion of the inner ring of the tapered bearing 3 at one end of the hub shaft 1 abuts against the shoulder 11, and the second oil seal 62 is embedded in the inner ring of the second end cover 22 and is in sealing contact with the adjusting lock nut 4.
[0028] In the above embodiment, the shoulder 11 ensures good assembly between the first end cover 21 and the end of the hub shaft 1, and the first oil seal 61 and the second oil seal 62 ensure the rotary sealing assembly between the first end cover 21 and the shoulder 11 and between the second end cover 22 and the adjusting lock nut 4.
[0029] As a preferred embodiment, the middle section of the side wall of the bearing seat 2 is provided with a pressure relief port, and the pressure relief port is provided with a deflation screw 24.
[0030] In the above embodiment, the cavity is defined between the two groups of tapered bearings 3 in the bearing seat 2, and when the lubricating grease is injected into the oil nozzle 23, the deflation screw 24 is loosened first, so that the pressure in the hub cavity can be smoothly discharged after the lubricating grease is injected.
[0031] As a preferred embodiment, the inner wall of the bearing seat 2 is coaxially provided with a convex ring 25 at both ends, and the two groups of tapered bearings 3 are arranged at the ends away from each other of the two convex rings 25, and the outer rings of the two groups of tapered bearings 3 abut against the two convex rings 25 correspondingly.
[0032] In the above embodiment, the convex ring 25 can position the tapered bearings 3, and at the same time, the convex ring 25 can limit the outer rings of the tapered bearings 3, which is beneficial to the adjustment of the bearing clearance.
[0033] In this embodiment, the outer ring of each of the two sets of tapered bearings 3 defines a first oil injection cavity and a second oil injection cavity with the first end cover 21 and the second end cover 22 respectively, and the oil nozzle 23 is arranged at the position of the first oil injection cavity and the second oil injection cavity respectively. When the oil is injected through the two oil nozzles 23, the oil enters the first oil injection cavity and the second oil injection cavity respectively, and then passes through the tapered bearings 3 to enter the cavity in the middle section of the bearing seat 2, thereby fully lubricating the tapered bearings 3.
[0034] As a preferred embodiment, the adjusting lock nut 4 comprises a circular nut body 41, one end of the nut body 41 is provided with an adjusting disc face 411 with a larger diameter than the nut body 41, and the other end of the nut body 41 is provided with an extension 412 in the form of a cylinder, and the extension 412 of the nut body 41 abuts against the inner ring of the tapered bearing 3 at the corresponding end.
[0035] In the above embodiment, the design of the adjusting disc face 411 facilitates the adjustment of the adjusting lock nut 4, and the design of the extension 412 ensures good connection and cooperation with the inner ring of the tapered bearing 3, thereby ensuring effective adjustment of the gap of the tapered bearing 3.
[0036] In this embodiment, a step with a smaller diameter than the main body is arranged at one end of the hub shaft 1, and the adjusting lock nut 4 is arranged at the step.
[0037] In this embodiment, a fork arm is fixed to one end of the hub shaft 1, and a locking structure for locking the adjusting disc face 411 is arranged on the fork arm. The locking structure can lock the adjusting lock nut 4 after adjusting the gap to avoid interference with the bearing gap due to rotation of the adjusting lock nut 4 under external force.
[0038] In this embodiment, the outer edge of the adjusting disc face 411 is circumferentially spaced apart by a plurality of square grooves 4111, and the locking structure is a locking screw that is screwed onto the fork arm. The locking screw can be screwed into a corresponding one of the square grooves 4111 in the current position or out of the square grooves 4111. When the gap of the tapered bearing 3 needs to be adjusted again, the bearing end cover does not need to be disassembled, the locking screw is first taken out of the square groove 4111 of the adjusting lock nut 4, and then the adjusting lock nut 4 is rotated to detect whether the bearing gap is within the required range, thereby greatly saving the bearing gap adjustment time and reducing the risk of contamination in the hub cavity. After adjustment, the locking screw is inserted into a corresponding one of the square grooves 4111, which is very quick and simple to operate.
[0039] Embodiment 2
[0040] The three-wheeled tractor of this embodiment comprises the hub structure for a three-wheeled tractor in Embodiment 1.
[0041] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.
[0042] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.
[0043] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0044] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.
[0045] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.
[0046] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.
Claims
1. A hub structure for a three-wheel tractor, characterized by: The invention comprises a hub shaft (1), a cylindrical bearing seat (2), two sets of tapered bearings (3) and an adjusting lock nut (4), wherein the bearing seat (2) is coaxially sleeved on the outside of the hub shaft (1), the outer rings of the two sets of tapered bearings (3) are coaxially fixed on the inner walls of the two ends of the bearing seat (2), and the inner rings are respectively installed on the two ends of the hub shaft (1), and one end of the bearing seat (2) is equipped with a first annular end cover (21), and the first end cover (21) is connected to the corresponding end of the hub shaft (1). A rotary seal assembly is provided, wherein one end of the bearing seat (2) is provided with a second end cover (22) in an annular shape, the adjusting lock nut (4) is screwed on the other end of the hub shaft (1), and coaxially passes through the second end cover (22), and abuts against the inner ring of the tapered bearing (3) at the corresponding end, the adjusting lock nut (4) and the second end cover (22) are rotary seal assembled, and oil nozzles (23) are respectively provided at the positions of the side wall of the bearing seat (2) corresponding to the two groups of tapered bearings (3).
2. The hub structure for a three-wheel tractor according to claim 1, characterized in that: Multiple bolts (5) are respectively provided through the outer edges of the first end cover (21) and the second end cover (22) at even intervals along the circumferential direction, and the bolts (5) are threadedly connected to the screw holes adapted to the ends of the bearing seat (2).
3. The hub structure for a three-wheel tractor according to claim 1, characterized in that: A circular shoulder (11) is coaxially provided at one end of the hub shaft (1), the inner ring of the first end cover (21) is in contact with the shoulder (11), and the inner ring of the first end cover (21) is embedded with a first oil seal (61) in sealing contact with the shoulder (11), the end of the inner ring of the tapered bearing (3) located at one end of the hub shaft (1) is in contact with the shoulder (11), and the inner ring of the second end cover (22) is embedded with a second oil seal (62) in sealing contact with the adjusting lock nut (4).
4. The hub structure for a three-wheel tractor according to claim 1, characterized in that: A pressure relief port is provided in the middle section of the side wall of the bearing seat (2), and a bleed screw (24) is installed in the pressure relief port.
5. The hub structure for a three-wheel tractor according to claim 1, characterized in that: The inner wall of the bearing seat (2) is coaxially provided with convex rings (25) at both ends, and the two groups of tapered bearings (3) are mounted on ends of the two convex rings (25) that are away from each other. The outer rings of the two groups of tapered bearings (3) are respectively opposed to the two convex rings (25).
6. The hub structure for a three-wheel tractor according to claim 1, characterized in that: A first oil injection cavity and a second oil injection cavity are defined between the outer rings of the two groups of tapered bearings (3) and the first end cover (21) and the second end cover (22), respectively. The oil nozzles (23) are respectively arranged at the locations of the first oil injection cavity and the second oil injection cavity.
7. A hub structure for a three-wheel tractor according to any one of claims 1 to 6, characterized in that: The adjusting lock nut (4) comprises a circular nut body (41), one end of the nut body (41) is provided with an adjusting disc (411) having a diameter larger than the nut body, and the other end of the nut body (41) is provided with a cylindrical extension (412), and the extension (412) of the nut body (41) abuts against the inner ring of the tapered bearing (3) at the corresponding end.
8. The hub structure for a three-wheel tractor according to claim 7, characterized in that: A fork arm is fixed to one end of the hub shaft (1), and a locking structure for locking the adjustment disc surface (411) is provided on the fork arm.
9. The wheel hub structure for a three-wheel tractor according to claim 8, characterized in that: The outer edge of the adjustment disk (411) is provided with a plurality of square grooves (4111) spaced circumferentially. The locking structure is a locking screw screwed onto the fork arm. The locking screw can be screwed into one of the square grooves (4111) corresponding to the current position, or screwed out of the square groove (4111).
10. A three-wheel tractor, characterized by: The invention comprises a hub structure for a three-wheel tractor according to any one of claims 1 to 9.