Shaft head locking structure

Abstract

The invention discloses a shaft head locking structure, and relates to the technical field of vehicle shaft head locking. The locking piece is clamped by the inner nut and the outer nut, so that the defect that the locking nut is loosened when an automobile runs joltly is effectively overcome. The shaft head locking structure is installed on a shaft head of an automobile and used for axially locking a bearing arranged on the shaft head in a sleeving mode, and the shaft head locking structure comprises an inner nut, a stop piece and an outer nut which are sequentially arranged on the shaft head in a sleeving mode from inside to outside. A threaded hole parallel to the axial direction of the outer nut is formed in the outer nut, a through hole parallel to the axial direction of the stop piece is formed in the stop piece, a cross countersunk bolt in threaded connection with the threaded hole is arranged in the threaded hole, and the inner end of the cross countersunk bolt extends into the through hole. According to the locking mode, the structure is stable, firmness is good, the requirement for the locking torque of the outer nut is low, and disassembly and maintenance can be further conducted more conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle axle head locking. Background Art

[0002] Currently, as an important load-bearing component of the vehicle's running part, the wheel hub is one of the important components affecting the safety performance of the whole vehicle. It not only needs to bear the vertical load of the vehicle itself in the static state (including the self-weight load and the load of passengers and goods), but also needs to bear the irregular stresses generated by various dynamic loads such as starting, braking, turning, wind resistance, stone impact, and uneven road surfaces during driving.

[0003] Therefore, the stable locking of the axle head is very important. The locking devices in the prior art generally use locking nuts plus brake pads for locking. Such locking devices are prone to loosening of the locking nuts during the bumpy driving of the vehicle, resulting in loosening of the wheels and affecting the driving safety of the vehicle. Summary of the Invention

[0004] In view of the above problems, the present invention proposes an axle head locking structure, which effectively avoids the defect of loosening of the locking nut during the bumpy driving of the vehicle by the form of clamping a stop piece with inner and outer double nuts.

[0005] The technical solution of the present invention is as follows: The axle head locking structure is installed on the axle head 5 of the vehicle and is used for axially locking the bearing sleeved on the axle head 5. The axle head locking structure includes an inner nut 1, a stop piece 3, and an outer nut 2 that are sequentially sleeved on the axle head 5 from the inside to the outside. The inner nut 1 and the outer nut 2 are threadedly connected to the axle head 5, and the stop piece 3 is slidably connected to the axle head 5; A threaded hole 20 parallel to its axial direction is provided on the outer nut 2, and a through hole 30 parallel to its axial direction is provided on the stop piece 3. A cross-recessed head bolt 4 threadedly connected thereto is provided in the threaded hole 20, and the inner end of the cross-recessed head bolt 4 extends into the through hole 30.

[0006] A chute parallel to its axial direction is provided on the surface of the axle head 5, and a slider integrally connected thereto is provided on the inner surface of the stop piece 3. The slider is adapted to the chute.

[0007] The distance between the center of the threaded hole 20 and the axis of the outer nut 2 is equal to the distance between the through hole 30 and the axis of the stop piece 3, and the diameter of the threaded hole 20 is smaller than the diameter of the through hole 30.

[0008] In order to ensure that the cross-recessed head bolt can extend into the through hole every time, the present case also particularly proposes the following design solution: Four threaded holes 20 are provided on the outer nut 2, and twenty through holes 30 are provided on the stop piece 3.

[0009] The four threaded holes 20 are evenly distributed circumferentially.

[0010] When the centers of the twenty through holes 30 are distributed on the same circumference and the circumference is equally divided into four arcs, then there are five through hole centers arranged on each arc. The spacing between adjacent through holes in the same arc is the same, and the included angle between the center line connecting the centers of adjacent through holes and the axis of the brake pad is π / 20, that is, 18°; In the clockwise direction, the angles between the centers of the starting through holes on the four arcs and the connection line between the starting point of the arc and the axis of the brake pad are 0, π / 80, 2π / 80, and 3π / 80 respectively.

[0011] In the present invention, by the form of clamping the stop piece with inner and outer nuts, the defect that the locking nut becomes loose when the vehicle is driving bumpily is effectively avoided. In this case, a countersunk cross-head bolt that penetrates both the outer nut and the stop piece is further proposed. Thus, after the countersunk cross-head bolt is installed, its locking effect can be further ensured. Generally speaking, the locking method in this case not only has a stable structure and good firmness, but also has a small requirement for the locking torque of the outer nut, and further can be disassembled and repaired more conveniently. Description of the Drawings

[0012] Figure 1 is a schematic diagram of the implementation mode of this case, Figure 2 is a schematic diagram of the structure of the outer nut, Figure 3 is a schematic diagram of the structure of the stop piece, Figure 4 is a schematic diagram of the equivalent positions of the through holes on the brake pad; In the figure, 1 is the inner nut, 2 is the outer nut, 20 is the threaded hole, 3 is the stop piece, 30 is the through hole, 4 is the countersunk cross-head bolt, 5 is the axle head, and 6 is the bearing installation position. Detailed Description of the Invention

[0013] To clearly illustrate the technical features of this patent, the following will elaborate on this patent in detail through specific implementation modes and in combination with its drawings.

[0014] As shown in Figure 1 , the axle head locking structure is installed on the axle head 5 of the vehicle and is used for axially locking the bearing sleeved on the axle head 5. The axle head locking structure includes an inner nut 1, a stop piece 3, and an outer nut 2 that are sleeved on the axle head 5 in sequence from the inside to the outside. The inner nut 1 and the outer nut 2 are threadedly connected to the axle head 5, and the stop piece 3 is slidably connected to the axle head 5; As an intermediate material for achieving the anti-rotation effect, the friction coefficients of both end faces of the stop piece 3 are relatively high.

[0015] The external nut 2 is provided with a threaded hole 20 parallel to its axis, and the stop piece 3 is provided with a through hole 30 parallel to its axis. A cross recessed head bolt 4 threadedly connected thereto is provided in the threaded hole 20, and the inner end of the cross recessed head bolt 4 extends into the through hole 30. In this way, in the form of clamping the stop piece by an internal and external double nut, the defect of the locking nut becoming loose during the bumpy driving of the vehicle is effectively avoided. In this case, a cross recessed head bolt that penetrates both the external nut and the stop piece is further proposed, so that after the cross recessed head bolt is installed, its locking effect can be further guaranteed.

[0016] In order to achieve the above-mentioned sliding connection, a chute parallel to its axis is provided on the surface of the shaft head 5, and a slider integrally connected therewith is provided on the inner surface of the stop piece 3, and the slider is adapted to the chute.

[0017] The distance between the center of the threaded hole 20 and the axis of the external nut 2 is equal to the distance between the through hole 30 and the axis of the stop piece 3, and the diameter of the threaded hole 20 is smaller than the diameter of the through hole 30. So that the cross recessed head bolt can better extend into the through hole on the stop piece.

[0018] Considering that the final stop position of the external nut is random during actual installation, in order to ensure that the cross recessed head bolt can extend into the through hole every time, the following design solution is particularly proposed in this case: The external nut 2 is provided with four threaded holes 20, and the stop piece 3 is provided with twenty through holes 30.

[0019] As Figure 2 shown, the four threaded holes 20 are evenly distributed in the circumferential direction.

[0020] As Figure 3 shown, the centers of the twenty through holes 30 are distributed on the same circumference. When the circumference is equally divided into four arcs, then there are five through hole centers arranged on each arc. The distance between adjacent through holes in the same arc is the same, and the included angle between the center of the adjacent through holes and the axis connection line of the brake piece is π / 20, that is, 18°; In the clockwise direction, the angles between the centers of the starting through holes on the four arcs and the connection line between the starting point of the arc and the axis of the brake piece are 0, π / 80, 2π / 80, and 3π / 80 respectively.

[0021] In this way, it can be ensured that after the external nut finally stops, there is always at least one threaded hole 20 within the range of a certain through hole 30, so as to ensure that at least one cross recessed head bolt can smoothly extend into the through hole every time to complete further locking.

[0022] The specific reason is that since the four threaded holes 20 are evenly distributed in the circumferential direction, therefore, the twenty through holes distributed on the circumference can be equivalent to the centers of the twenty through holes equally divided on the same quarter arc, as Figure 4 shown. At this time, adjacent through holes intersect, and the intersection area is large enough to accommodate the size of the threaded hole; in this way, no matter what position the four threaded holes 20 rotate to, there will always be a threaded hole falling within the area where the twenty through holes are arranged, that is, it can be ensured that no matter at what angle the outer nut stops, at least one countersunk head cross recessed bolt can smoothly extend into the through hole.

[0023] There are many specific implementation ways of the present invention. The above are only the preferred implementation manners of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A shaft head locking structure, characterized in that, The shaft head locking structure is installed on the shaft head (5) of an automobile and is used for axially locking the bearing sleeved on the shaft head (5). The shaft head locking structure includes an inner nut (1), a stop piece (3), and an outer nut (2) which are sleeved on the shaft head (5) in sequence from the inside to the outside. The inner nut (1) and the outer nut (2) are threadedly connected to the shaft head (5), and the stop piece (3) is slidably connected to the shaft head (5). A threaded hole (20) parallel to its axis is formed in the outer nut (2), and a through hole (30) parallel to its axis is formed in the stop piece (3). A countersunk head cross bolt (4) threadedly connected to the threaded hole (20) is arranged in the threaded hole (20), and the inner end of the countersunk head cross bolt (4) extends into the through hole (30).

2. The shaft head locking structure according to claim 1, characterized in that, A chute parallel to its axis is formed on the surface of the shaft head (5), and a slider integrally connected to the inner surface of the stop piece (3) is arranged on the inner surface of the stop piece (3). The slider is adapted to the chute.

3. The shaft head locking structure according to claim 1, characterized in that, The distance between the center of the threaded hole (20) and the axis of the outer nut (2) is equal to the distance between the through hole (30) and the axis of the stop piece (3), and the diameter of the threaded hole (20) is smaller than the diameter of the through hole (30).

4. A shaft head locking structure according to any one of claims 1 to 3, characterized in that, Four threaded holes (20) are formed in the outer nut (2), and twenty through holes (30) are formed in the stop piece (3).

5. The shaft head locking structure according to claim 4, characterized in that, The four threaded holes (20) are evenly distributed in the circumferential direction.

6. The shaft head locking structure according to claim 5, characterized in that, When the centers of the twenty through holes (30) are distributed on the same circumference and the circumference is equally divided into four arcs, then the centers of five through holes are arranged on each arc. The distance between adjacent through holes in the same arc is consistent, and the included angle between the center of the adjacent through hole and the axis connection line of the brake piece is π / 20, that is, 18°. In the clockwise direction, the included angles between the centers of the starting through holes on the four arcs and the connection line between the starting point of the arc and the axis of the brake piece are 0, π / 80, 2π / 80, and 3π / 80 respectively.

Images