Quick locking structure of hub bearing, dismounting method and mine car

Abstract

The application discloses a quick locking structure of a hub bearing, a dismounting method and a mine car. The quick locking structure mainly comprises a half shaft sleeve, a first bearing assembled on the half shaft sleeve, a hub connected with the first bearing, a second bearing on the other side of the hub, a wheel rim gear support assembled between the second bearing and the half shaft sleeve, a pressing disc for axially pressing the wheel rim gear support and the bearing, a first locking component for limiting the circumferential rotation of the pressing disc, a pushing component for providing an axial force for the pressing disc, a second locking component for locking the axial displacement of the pushing component, and a quick dismountable locking disc assembled on the half shaft sleeve. The quick locking structure of the mine car hub bearing can realize quick locking of the hub bearing, shorten the maintenance period of the bearing dismounting and mounting maintenance operation, and reduce the workload of maintenance workers.

Description

Technical Field

[0001] This invention relates to a quick-locking structure for wheel hub bearings, belonging to the field of mining car technology. Background Technology

[0002] Mining engine wheel hub bearings typically employ a pair of tapered roller bearings, often using a "double round nut + anti-rotation structure" to lock and control the bearing's axial clearance. This structure requires machining threads on the axle sleeve to mate with the round nuts. To shorten the axial dimension and ensure a sufficient number of engaging threads, fine-pitch threads are commonly used. The locking process involves first tightening the inner round nut closest to the bearing to the appropriate position, then tightening the outer round nut close to the inner round nut to prevent rotation. When maintaining the axle, especially when disassembling and assembling the wheel hub bearings, repeated disassembly and tightening of the two round nuts is necessary each time, resulting in a long work cycle and difficulties in positioning and repositioning the round nuts. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a quick-locking structure for mining truck wheel hub bearings. This quick-locking structure possesses the basic function of locking wheel hub bearings, while also enabling rapid disassembly and assembly, significantly shortening the wheel hub bearing disassembly and assembly cycle.

[0004] This invention is implemented according to the following technical solution: In a first aspect, the present invention provides a quick-locking structure for a wheel hub bearing, comprising: The half-shaft sleeve is a stepped shaft. The axle sleeve is equipped with a first bearing, a hub, a second bearing, and a wheel-side gear ring bracket. The hub is connected to the axle sleeve via the first bearing and the second bearing. The wheel-side gear ring bracket is assembled between the axle sleeve and the inner ring of the second bearing. The wheel-side gear ring bracket and the axle sleeve cannot rotate circumferentially. A clamping disc, assembled on the half-shaft sleeve, is used to axially clamp the wheel-side gear ring bracket and the first bearing and the second bearing; The first locking component acts on the pressure plate and the half-shaft sleeve to restrict the circumferential rotation of the pressure plate; A locking disc is mounted on the half-shaft sleeve outside the pressing disc, and the locking disc is engaged with one end of the half-shaft sleeve. A pushing component and a second locking component are mounted on the locking plate. The pushing component passes through the locking plate and is used to provide axial thrust to the pressure plate. The second locking component is used to lock the axial movement of the pushing component.

[0005] In some embodiments, the inner ring of the first bearing is connected to the outer circle of the half-shaft sleeve, the end face of the inner ring of the first bearing is in contact with the shoulder end face of the half-shaft sleeve, and the outer ring of the first bearing is embedded in the inner hole on one side of the hub; the outer ring of the second bearing is embedded in the inner hole on the other side of the hub, and a partition is provided between the inner holes on both sides of the hub.

[0006] In some embodiments, an external spline is provided on the radial outer circumferential surface of the half-shaft sleeve, and an internal spline is provided on the radial inner circumferential surface of the inner hole of the wheel-side gear ring bracket. The circumferential rotation between the wheel-side gear ring bracket and the half-shaft sleeve is restricted by the meshing of the internal and external splines.

[0007] In some embodiments, the half-shaft sleeve has a ring of evenly spaced and axially inwardly extending fixing grooves on the stepped surface facing the side of the clamping plate; the clamping plate is mounted on the stepped surface of the half-shaft sleeve facing the side of the clamping plate, the clamping plate is a ring structure, and the inner ring edge of the clamping plate is provided with at least one pair of anti-rotation grooves, each anti-rotation groove corresponding to a fixing groove; the first locking component is inserted into the anti-rotation groove and the fixing groove respectively, so that the quick locking structure of the wheel hub bearing restricts the circumferential rotation of the clamping plate during operation.

[0008] In some embodiments, the first locking component is a screw, the fixing slot is a threaded hole, and the screw cooperates with the threaded hole to assemble and disassemble the pressure plate.

[0009] In some embodiments, the clamping plate has a plurality of uniformly spaced blind holes along its circumferential direction on one side near the locking plate; the plurality of blind holes correspond to the number and position of the push fixing holes arranged on the locking plate, and the radial cross-sectional dimension of the blind holes is larger than the radial cross-sectional dimension of the push component.

[0010] In some embodiments, the locking disc is an annular structure with a ring of evenly spaced and radially outwardly extending rotating protrusions on its inner annular surface; a ring of evenly spaced and radially outwardly extending fixed protrusions is provided on the radially outer circumferential surface of one end of the half-shaft sleeve; the multiple rotating protrusions and the multiple fixed protrusions are arranged in a crisscross pattern in the circumferential direction, and the locking disc is rotated in a direction that engages the first protrusion inclined surface on the half-shaft sleeve with the second protrusion inclined surface on the locking disc, thereby converting the circumferential rotation of the locking disc into axial movement, until the end face of the locking disc engages with the protrusion plane on the half-shaft sleeve and the position of the push fixing hole on the locking disc corresponds to the position of the blind hole.

[0011] In some embodiments, the locking disc has a ring of evenly spaced notches along the circumferential direction on its radial outer circumferential surface, and a torque is applied to the notches to drive the locking disc to rotate.

[0012] In some embodiments, the pushing component is installed in the pushing fixing hole on the locking plate, and the front end of the pushing component extends into the blind hole of the pressing plate; the front end of the pushing component is pressed against the bottom surface of the blind hole, and the axial pressing force of the pushing component is transmitted to the end face of the second bearing; the second locking component is installed on the pushing component, and after the pushing component moves axially to push the first bearing and the second bearing to a suitable axial clearance, the relative position of the pushing component and the locking plate is locked by the second locking component.

[0013] In some embodiments, the locking disc is an annular structure with a ring of evenly spaced push-fixing holes on its side along the circumference; the push-fixing holes are threaded holes, the push-up component is a bolt, and the second locking component is a nut; the bolt engages with the threaded hole to convert circumferential rotation into axial movement, thereby pushing the clamping disc to move axially; the nut is fitted onto the tail of the bolt and fits against the threaded hole on the locking disc, providing axial and circumferential support for the nut and allowing axial movement of the nut.

[0014] Secondly, the present invention provides a mining car equipped with the aforementioned quick-locking structure for the wheel hub bearing.

[0015] Thirdly, the present invention provides a method for disassembling and assembling the quick-locking structure based on the above-mentioned hub bearing: Mode 1: During the initial assembly, the first bearing, hub, wheel-side gear ring bracket, second bearing, and clamping plate are sequentially assembled onto the half-shaft sleeve. A first locking component is installed between the pressure plate and the half-shaft sleeve to prevent the pressure plate from rotating circumferentially. Screw the locking disc onto the half-shaft sleeve, and then assemble the pushing component and the second locking component onto the locking disc; The axial clearance of the first and second bearings is adjusted to a suitable position by the jacking component, and the jacking component is axially fixed by the second locking component. Mode 2: When the first bearing and the second bearing are being disassembled, remove the first locking component, rotate the locking disc, and drive the pressing disc to make circumferential movement through the pushing component, so as to remove the locking disc and the pressing disc from the half shaft sleeve, and then remove and disassemble the wheel-side gear ring bracket, the second bearing, the wheel hub and the first bearing. Mode 3: During reassembly, install the first bearing, hub, second bearing, and wheel-side gear ring bracket onto the half-shaft sleeve; Stack the locking disc and the pressure disc and apply the jacking component to the pressure disc. Rotate the locking disc to fix it on the half-shaft sleeve. Install the first locking component to restore the bearing to its initial locking state and complete the wheel hub bearing locking operation.

[0016] Beneficial effects of this invention: This invention solves the problems of long assembly and disassembly cycles and high machining difficulty of round nuts and shaft threads in traditional mine car wheel hub bearings. It provides a novel structure that allows for rapid assembly and disassembly of wheel hub bearings, effectively reducing the workload and operation cycle of mine car wheel hub maintenance. Attached Figure Description

[0017] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0018] In the attached diagram: Figure 1 This is a schematic diagram of the rotational cross-section of the quick-locking structure of the wheel hub bearing of the present invention, passing through the center line of the locking bolt and the limiting screw. Figure 2 This is an exploded view of the quick-locking structure of the wheel hub bearing of the present invention; Figure 3 This is a schematic diagram of the locking end structure of the half-shaft sleeve of the present invention (a is view 1, b is view 2). Figure 4 This is a schematic diagram of the clamping disc structure of the present invention; Figure 5 This is a schematic diagram of the locking disc structure of the present invention (a is the front view, b is the perspective view).

[0019] Explanation of reference numerals in the attached diagram: 1. Half-shaft sleeve; 2. First bearing; 3. Wheel hub; 4. Second bearing; 5. Wheel-side gear ring bracket; 6. Pressure plate; 7. First locking component; 8. Locking plate; 9. Second locking component; 10. Pushing component; 101. Fixed protrusion; 102. Protrusion plane; 103. Protrusion slope one; 104. Fixed slot; 601. Anti-rotation slot; 602. Blind hole; 801. Notch; 802. Pushing fixing hole; 803. Protrusion slope two; 804. Rotating protrusion.

[0020] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 limiting this invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] like Figure 1 , Figure 2 As shown, a quick-locking structure for a wheel hub bearing includes a half-shaft sleeve 1, a pressure plate 6, a first locking component 7, a locking plate 8, a pushing component 10, a second locking component 9, and a first bearing 2, a wheel hub 3, a second bearing 4, and a wheel-side gear ring bracket 5 mounted on the half-shaft sleeve 1. The half-shaft sleeve 1 is a stepped shaft. The wheel hub 3 is connected to the first bearing 2 and the second bearing 4, and isolates the first bearing 2 and the second bearing 4. The wheel-side gear ring bracket 5 is mounted between the half-shaft sleeve 1 and the second bearing 4, and the wheel-side gear ring bracket 5 and the half-shaft sleeve 1 can only slide axially and cannot rotate circumferentially. The pressure plate 6 is mounted on... The first locking component 7 is mounted on the half-shaft sleeve 1 and is used to axially press the wheel-side gear ring bracket 5 and the first bearing 2 and the second bearing 4. The first locking component 7 acts on the pressing plate 6 and the half-shaft sleeve 1 to restrict the circumferential rotation of the pressing plate 6, but does not restrict the axial movement of the pressing plate 6. The locking plate 8 is mounted on the half-shaft sleeve 1 located outside the pressing plate 6, and the locking plate 8 is engaged with one end of the half-shaft sleeve 1. The pushing component 10 and the second locking component 9 are mounted on the locking plate 8. The pushing component 10 passes through the locking plate 8 and is used to provide axial thrust to the pressing plate 6. The second locking component 9 is used to lock the axial movement of the pushing component 10.

[0025] The following provides a further explanation of the connection method between the first bearing, the hub, the wheel-side gear ring bracket, the second bearing, and the half-shaft sleeve.

[0026] Continue to refer to Figure 1 , Figure 2As shown, the inner ring of the first bearing 2 is connected to the outer circle of the half-shaft sleeve 1, the end face of the inner ring of the first bearing 2 is in contact with the end face of the shaft shoulder of the half-shaft sleeve 1, and the outer ring of the first bearing 2 is embedded in the inner hole on one side of the hub 3; the outer ring of the second bearing 4 is embedded in the inner hole on the other side of the hub 3, and a partition is provided between the inner holes on both sides of the hub 3.

[0027] Continue to refer to Figure 1 , Figure 2 As shown, the outer radial surface of the half-shaft sleeve 1 is provided with an external spline, and the inner radial surface of the inner hole of the wheel-side gear ring bracket 5 is provided with an internal spline. The engagement of the internal and external splines enables the wheel-side gear ring bracket 5 and the half-shaft sleeve 1 to slide axially but not rotate circumferentially.

[0028] It should be noted that in some forms, the wheel hub 3 can also be other types of internal cavity structures connected to the outer ring of the bearing, such as a bearing housing. The wheel-side gear ring bracket 5 is not a necessary component of this invention; it is merely a part included in conventional drive axles and can be omitted in non-drive axles.

[0029] The connection method between the clamping plate and the half-shaft sleeve described above will be further explained below.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the half-shaft sleeve 1 has a ring of evenly spaced and axially inwardly extending fixing grooves 104 on the stepped surface facing the side of the pressure plate 6; the pressure plate 6 has a circular ring structure, with at least a pair of anti-rotation grooves 601 facing each other, opening towards the center and protruding outward on its inner ring surface, each anti-rotation groove 601 corresponding to a fixing groove 104; the first locking component 7 is inserted into the anti-rotation groove 601 and the fixing groove 104 respectively, thereby realizing the circumferential fixation of the pressure plate 6 relative to the half-shaft sleeve 1.

[0031] Preferred solution: The first locking component 7 is a screw, and the fixing slot 104 is a threaded hole. The screw and the threaded hole cooperate to disassemble and assemble the pressure plate 6.

[0032] It should be noted that in this invention, screws are used to achieve the locking function of circumferential rotation. However, it will be understood that the first locking component 7 can also be implemented in other forms, such as flat keys, splines, teeth, pins, etc., all of which are within the scope of this invention. The number and manner of the first locking component 7 can also be changed to different configurations.

[0033] The connection methods of the aforementioned clamping plate, locking plate, and half-shaft sleeve will be further explained below.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the side of the clamping plate 6 near the locking plate 8 is provided with a plurality of uniformly spaced blind holes 602 along the circumference; the number and position of the plurality of blind holes 602 correspond to the number of push fixing holes 802 arranged on the locking plate 8; the radial cross-sectional dimension of the blind holes 602 is larger than the radial cross-sectional dimension of the push component 10.

[0035] The locking disc 8 has a circular ring structure with a ring of evenly spaced and radially outwardly extending rotating protrusions 804 on its inner ring surface. The radially outer circumferential surface of the half-shaft sleeve 1 has a ring of evenly spaced and radially outwardly extending fixed protrusions 101. The multiple rotating protrusions 804 and multiple fixed protrusions 101 are arranged in a crisscross pattern in the circumferential direction. The locking disc 8 is rotated in the direction that makes the first protruding inclined surface 103 on the half-shaft sleeve 1 mesh with the second protruding inclined surface 803 on the locking disc 8, converting the circumferential rotation of the locking disc 8 into axial movement, until the end face of the locking disc 8 engages with the protruding plane 102 on the half-shaft sleeve 1 and the positions of the push fixing hole 802 and the blind hole 602 on the locking disc 8 correspond.

[0036] Further options, such as Figure 5 As shown, a ring of evenly spaced notches 801 is provided on the radial outer circumference of the locking disc 8. A torque is applied to the notches 801 to drive the locking disc 8 to rotate.

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the pushing component 10 is installed in the pushing fixing hole 802 on the locking plate 8, and the front end of the pushing component 8 extends into the blind hole 602 of the pressure plate 6; the axial surface of the blind hole 602 is pressed against the front end face of the pushing component 10, transmitting the axial pressing force of the pushing component 10 to the end face of the second bearing 4; the radial circumferential surface of the blind hole 602 is engaged with the radial circumferential surface of the front end of the pushing component 10, so that when the pushing component 10 rotates circumferentially with the locking plate 8, the pressure plate 6 rotates synchronously under circumferential force; the second locking component 9 is installed on the pushing component 10, and after the pushing component 10 moves axially to push the first bearing 2 and the second bearing 4 to a suitable axial clearance, the relative position of the pushing component 10 and the locking plate 8 is locked by the second locking component 9.

[0038] Preferred solutions, such as Figure 5As shown, the locking disc 8 has a circular structure with a ring of evenly spaced push-fixing holes 802 on its side. The push-fixing holes 802 are threaded holes, the push-up component 10 is a bolt, and the second locking component 9 is a nut. The bolt engages with the threaded hole to convert circumferential rotation into axial movement, thereby pushing the clamping disc 6 to move axially. The nut is fitted onto the tail of the bolt and fits into the threaded hole on the locking disc 8 to provide axial and circumferential support for the nut and allow axial movement of the nut.

[0039] It should be noted that after locking is completed, there is a gap between the pressure plate 6 and the locking plate 8. The gap value should be greater than 0 in this invention. In this invention, it is temporarily set to 4mm.

[0040] The jacking component 10 can move axially relative to the locking disc 8 along the center line of the half-shaft sleeve 1 via a nut, and the relative position of the jacking component 10 and the locking disc 8 can be locked by the nut. The present invention achieves its axial jacking function with 6 bolts evenly distributed circumferentially, but other implementations, such as cams, are also optional; the number of jacking components 10 can also be changed according to the specific implementation.

[0041] In this invention, the second locking component 9 uses a nut to achieve its circumferential rotation locking function. However, it will be understood that the second locking component 9 can also be implemented in other forms, such as galvanized iron wire, fastening adhesive, etc., all of which are within the scope of the invention. The number and manner of the second locking component 9 can also be changed to different configurations.

[0042] The following describes the disassembly and assembly method for the quick-locking structure of the aforementioned wheel hub bearing: like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, during the initial assembly, the first bearing 2, hub 3, wheel-side gear ring bracket 5, second bearing 4, and clamping plate 6 are sequentially assembled onto the half-shaft sleeve 1. The anti-rotation slot 601 is aligned with any set of fixed slots 104. The first locking component 7 is inserted to prevent the clamping plate 6 from rotating circumferentially. The rotating protrusions 804 of the locking plate 8 are placed alternately between the fixed protrusions 101 of the half-shaft sleeve 1. A torque is applied to the notch 801 of the locking plate 8. The locking plate 8 is rotated in the direction that makes the first protrusion inclined surface 103 and the second protrusion inclined surface 803 mesh, until the end face of the locking plate 8 contacts the protrusion plane 102 and the push fixing hole 802 and the blind hole 602 are in the same position. The second locking component 9 and the push component 10 are sequentially placed at the push fixing hole 802. The push component 10 is adjusted until the axial clearance of the first bearing 2 and the second bearing 4 is in a suitable position, and the push component 10 is axially fixed by the second locking component 9.

[0043] When disassembling the first bearing 2 or the second bearing 4, remove the first locking component 7, rotate the locking disc 8, and the front of the pushing component 10 drives the pressure disc 6 to rotate circumferentially through the blind hole 602 until the rotating protrusion 804 and the fixed protrusion 101 intersect. The locking disc 8 and the pressure disc 6 can then be easily removed from the half-shaft sleeve 1. At this point, the wheel-side gear ring bracket 5, the second bearing 4, the wheel hub 3, and the first bearing 2 can be disassembled. During reassembly, install the first bearing 2, the wheel hub 3, the second bearing 4, and the wheel-side gear ring bracket 5. Stack the locking disc 8 and the pressure disc 6 so that the front of the pushing component 10 is within the blind hole 602. Rotate the locking disc 8 until the anti-rotation slot 601 aligns with any set of fixed slots 104. Install the first locking component 7 to restore the bearing to its initial locking state, completing the wheel hub bearing locking operation.

[0044] This invention also provides a mining truck equipped with the aforementioned quick-locking structure for the wheel hub bearing. The quick-locking structure mainly includes: a half-shaft sleeve, a first bearing mounted on the half-shaft sleeve, a wheel hub connected to the first bearing, a second bearing on the other side of the wheel hub, a wheel-side gear ring bracket mounted between the second bearing and the half-shaft sleeve, a clamping plate for axially pressing the wheel-side gear ring bracket and the bearing, a first locking component restricting the circumferential rotation of the clamping plate, a pushing component providing axial force to the clamping plate, a second locking component locking the axial displacement of the pushing component, and a quick-detachable locking plate mounted on the half-shaft sleeve. The quick-locking structure for the wheel hub bearing of this mining truck embodiment can achieve rapid locking of the wheel hub bearing, shortening the maintenance cycle involving bearing disassembly and assembly, and reducing the workload of maintenance workers.

[0045] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0046] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A quick-locking structure for a wheel hub bearing, characterized in that, include: The half-shaft sleeve is a stepped shaft. The axle sleeve is equipped with a first bearing, a hub, a second bearing, and a wheel-side gear ring bracket. The hub is connected to the axle sleeve via the first bearing and the second bearing. The wheel-side gear ring bracket is assembled between the axle sleeve and the inner ring of the second bearing. The wheel-side gear ring bracket and the axle sleeve cannot rotate circumferentially. A clamping disc, assembled on the half-shaft sleeve, is used to axially clamp the wheel-side gear ring bracket and the first bearing and the second bearing; The first locking component acts on the pressure plate and the half-shaft sleeve to restrict the circumferential rotation of the pressure plate; A locking disc is mounted on the half-shaft sleeve outside the pressure disc, and the locking disc is engaged with one end of the half-shaft sleeve. The locking disc has a circular ring structure, with a ring of evenly spaced and radially outwardly extending rotating protrusions on its inner ring surface. A ring of evenly spaced and radially outwardly extending fixed protrusions is provided on the radially outer circumferential surface of one end of the half-shaft sleeve. Multiple rotating protrusions and multiple fixed protrusions are arranged in a crisscross pattern in the circumferential direction. The locking disc is rotated in the direction that makes the first protrusion inclined surface on the half-shaft sleeve mesh with the second protrusion inclined surface on the locking disc, converting the circumferential rotation of the locking disc into axial movement, until the end face of the locking disc engages with the protrusion plane on the half-shaft sleeve and the position of the push fixing hole on the locking disc corresponds to the position of the blind hole on the pressure disc. A pushing component and a second locking component are mounted on the locking plate. The pushing component passes through the locking plate and is used to provide axial thrust to the pressure plate. The second locking component is used to lock the axial movement of the pushing component.

2. The quick-locking structure for a wheel hub bearing according to claim 1, characterized in that: The inner ring of the first bearing is connected to the outer circle of the half-shaft sleeve, the end face of the inner ring of the first bearing is in contact with the shoulder end face of the half-shaft sleeve, and the outer ring of the first bearing is embedded in the inner hole on one side of the hub. The outer ring of the second bearing is embedded in the inner hole on the other side of the hub, and a partition is provided between the inner holes on both sides of the hub.

3. The quick-locking structure for a wheel hub bearing according to claim 1, characterized in that: The outer radial surface of the half-shaft sleeve is provided with an external spline, and the inner radial surface of the inner hole of the wheel-side gear ring bracket is provided with an internal spline. The circumferential rotation between the wheel-side gear ring bracket and the half-shaft sleeve is restricted by the meshing of the internal and external splines.

4. The quick-locking structure for a wheel hub bearing according to claim 1, characterized in that: The half-shaft sleeve has a ring of evenly spaced and axially inwardly extending fixing grooves on the stepped surface facing the side of the pressure plate. The clamping plate is mounted on the stepped surface of the half-shaft sleeve facing the side of the clamping plate. The clamping plate has a circular structure. The inner ring edge of the clamping plate is provided with at least one pair of anti-rotation grooves, and each anti-rotation groove corresponds to a fixing groove. The first locking component is inserted into the anti-rotation slot and the fixing slot respectively, which are used to restrict the circumferential rotation of the pressure plate during the operation of the quick-locking structure of the wheel hub bearing.

5. The quick-locking structure for a wheel hub bearing according to claim 4, characterized in that: The first locking component is a screw, and the fixing slot is a threaded hole. The screw and the threaded hole cooperate to assemble and disassemble the pressure plate.

6. The quick-locking structure for a wheel hub bearing according to claim 1, characterized in that: The clamping plate has a plurality of uniformly spaced blind holes along its circumferential direction on one side near the locking plate; the plurality of blind holes correspond to the number and position of the push fixing holes arranged on the locking plate, and the radial cross-sectional dimension of the blind holes is larger than the radial cross-sectional dimension of the push component.

7. The quick-locking structure for a wheel hub bearing according to claim 1, characterized in that: The locking disc has a ring of evenly spaced notches along its circumferential direction on its radial outer circumferential surface. Applying torque to the notches causes the locking disc to rotate.

8. The quick-locking structure for a wheel hub bearing according to claim 1, characterized in that: The pushing component is installed in the pushing fixing hole on the locking plate, and the front end of the pushing component extends into the blind hole of the pressing plate; the front end of the pushing component is pressed against the bottom surface of the blind hole, and the axial pressing force of the pushing component is transmitted to the end face of the second bearing. The second locking component is installed on the pushing component. After the pushing component moves axially to push the first bearing and the second bearing to a suitable axial clearance, the second locking component locks the relative position of the pushing component and the locking plate.

9. The quick-locking structure for a wheel hub bearing according to claim 8, characterized in that: The locking disc has a circular structure with a ring of evenly spaced push-fixing holes on its side along the circumference. The jacking fixing hole is a threaded hole, the jacking component is a bolt, and the second locking component is a nut; The bolt engages with the threaded hole, converting circumferential rotation into axial movement, thereby pushing the pressure plate to move axially. The nut is fitted onto the tail of the bolt and engages with the threaded hole on the locking disc to provide axial and circumferential support for the nut and allow axial movement of the nut.

10. A mining car, characterized in that: The wheel hub bearing is equipped with a quick-locking structure according to any one of claims 1 to 9.

11. A method for disassembling and assembling a wheel hub bearing based on the quick-locking structure according to any one of claims 1 to 9, characterized in that: Mode 1: During the initial assembly, the first bearing, hub, wheel-side gear ring bracket, second bearing, and clamping plate are sequentially assembled onto the half-shaft sleeve. A first locking component is installed between the pressure plate and the half-shaft sleeve to prevent the pressure plate from rotating circumferentially. Screw the locking disc onto the half-shaft sleeve, and then assemble the pushing component and the second locking component onto the locking disc; The axial clearance of the first and second bearings is adjusted to a suitable position by the jacking component, and the jacking component is axially fixed by the second locking component. Mode 2: When the first bearing and the second bearing are being disassembled, remove the first locking component, rotate the locking disc, and drive the pressing disc to make circumferential movement through the pushing component, so as to remove the locking disc and the pressing disc from the half shaft sleeve, and then remove and disassemble the wheel-side gear ring bracket, the second bearing, the wheel hub and the first bearing. Mode 3: During reassembly, install the first bearing, hub, second bearing, and wheel-side gear ring bracket onto the half-shaft sleeve; Stack the locking disc and the pressure disc and apply the jacking component to the pressure disc. Rotate the locking disc to fix it on the half-shaft sleeve. Install the first locking component to restore the bearing to its initial locking state and complete the wheel hub bearing locking operation.

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