阅读说明：本技术 一种分体式螺纹连接转向节壳总成 (Split type threaded connection knuckle shell assembly ) 是由 徐勇 夏国锋 吕鉴福 李传博 刘玉祥 王云 段羽 潘恒新 张宝江 于 2021-06-30 设计创作，主要内容包括：本发明公开了一种分体式螺纹连接转向节壳总成。该转向节壳总成包括转向节壳体,转向节壳体的一侧设置有轴管,轴管的内部轴向设置有制动液孔和气孔,轴管与转向节壳体通过螺栓固定连接,轴管的端面与转向节壳体的侧面贴合处设置有密封腔,气孔的端部与密封腔连通,转向节壳体的内部设置有注气道,注气道的一端与密封腔连通,注气道的另一端从转向节壳体的边缘处引出,且连通有气管总成。通过将轴管设计为利用螺栓固定的分体式结构,先分体进行加工,再螺栓连接固定成型,有效提升转向节壳总成的加工质量,降低加工难度和制造成本,另外在轴管端面与转向节壳体侧面的接触部位设置密封腔,中转气路,使注气道的布置位置灵活多变。(The invention discloses a split type threaded connection steering knuckle shell assembly. This knuckle shell assembly includes the knuckle casing, one side of knuckle casing is provided with the central siphon, the inside axial of central siphon is provided with brake fluid hole and gas pocket, the central siphon passes through bolt fixed connection with the knuckle casing, the terminal surface of central siphon is provided with sealed chamber with the side laminating department of knuckle casing, the tip and the sealed chamber intercommunication of gas pocket, the inside of knuckle casing is provided with the gas injection way, the one end and the sealed chamber intercommunication of gas injection way, the other end that the gas injection was said is drawn forth from the edge of knuckle casing, and the intercommunication has the trachea assembly. Through designing the central siphon for utilizing the split type structure of bolt fastening, the components of a whole that can function independently earlier processes, and bolted connection fixed shaping again effectively promotes the processingquality of knuckle shell assembly, reduces the processing degree of difficulty and manufacturing cost, sets up sealed chamber at the central siphon terminal surface in addition and the contact site of knuckle shell side, and the transfer gas circuit makes arranging of gas injection way position nimble changeable.)

1. A split type threaded connection steering knuckle shell assembly comprises a steering knuckle shell (1), a shaft tube (2) is arranged on one side of the steering knuckle shell (1), a brake fluid hole (21) and an air hole (22) are axially arranged in the shaft tube (2), it is characterized in that the axle tube (2) is fixedly connected with the steering knuckle shell (1) through a bolt, a sealing cavity (3) is arranged at the joint of the end surface of the shaft tube (2) and the side surface of the steering knuckle shell (1), the end part of the air hole (22) is communicated with the sealing cavity (3), an air injection channel (11) is arranged in the steering knuckle shell (1), one end of the gas injection channel (11) is communicated with the sealing cavity (3), and the other end of the gas injection channel (11) is led out from the edge of the steering knuckle shell (1) and is communicated with a gas pipe assembly (4).

2. The split type threaded knuckle housing assembly according to claim 1, wherein an inner cavity (12) is formed in one side of the top end of the knuckle housing (1), an upper support lug (13) is formed in the top of the inner cavity (12), a lower support lug (14) is formed in the bottom of the inner cavity (12), and the other end of the gas injection channel (11) is led out from the bottom of the lower support lug (14).

3. The split-type threaded knuckle housing assembly according to claim 1, wherein a flange seat (23) is provided at a fixed end of the axle tube (2), and a flange mounting groove (15) is provided at a side surface of the knuckle housing (1) corresponding to the flange seat (23).

4. A split-type threaded knuckle housing assembly according to claim 3, characterized in that a groove (16) is provided at the bottom of the flange mounting groove (15), and the notch of the groove (16) is in sealing engagement with the end face of the shaft tube (2) to form the sealing cavity (3).

5. A split threaded knuckle housing assembly according to claim 4, wherein said groove (16) is arranged annularly around the shaft axis of the shaft tube (2), and a first seal (91) and a second seal (92) are provided on both sides of the notch of the groove (16), respectively.

6. A split-type threaded knuckle housing assembly according to claim 3, characterized in that a plurality of locating pins (5) are further provided between the flange seat (23) and the flange mounting groove (15).

7. The split type threaded knuckle housing assembly according to claim 1, wherein a fixed end of the axle tube (2) is provided with an oil pipe joint bolt (6), a through hole is formed in the middle of the oil pipe joint bolt (6), one end of the oil pipe joint bolt (6) is communicated with the brake fluid hole (21), and the other end of the oil pipe joint bolt (6) extends out through the knuckle housing (1) and is communicated with a brake fluid pipe assembly (7).

8. The split type threaded connection steering knuckle housing assembly according to claim 7, wherein a stepped blind hole (24) is formed in the fixed end face of the shaft tube (2), the brake fluid hole (21) penetrates through the bottom face of the stepped blind hole (24) and is communicated with the stepped blind hole (24), a boss cylinder (17) is arranged on the side face of the steering knuckle housing (1) corresponding to the stepped blind hole (24), the boss cylinder (17) is embedded in the outer stepped hole of the stepped blind hole (24), and the oil pipe joint bolt (6) penetrates through the middle hole of the boss cylinder (17) and is in threaded connection with the inner stepped hole of the stepped blind hole (24).

9. The split-type threaded knuckle housing assembly according to claim 8, wherein a third seal (93) is disposed between the middle portion of the tubing joint bolt (6) and the stepped hole inside the stepped blind hole (24), and a fourth seal (94) is disposed between the camshaft sleeve (17) and the stepped hole outside the stepped blind hole (24).

10. The split threaded knuckle housing assembly according to claim 1, characterized in that an anti-loosening ring (8) is arranged on the side of the end of the tubing joint bolt (6) protruding out of the knuckle housing (1), and the anti-loosening ring (8) is fixed by a screw.

Technical Field

The invention relates to the field of steering knuckles, in particular to a split type threaded connection steering knuckle shell assembly.

Background

The wheel edge structure of a common automobile is simple, and the basic functions of steering, wheel power transmission, walking and braking can be realized, but for an off-road vehicle or a special vehicle, besides the basic functions, the wheel edge structure has the functions of wheel edge speed reduction and wheel central inflation, so that the ground clearance of the automobile can be increased, the passing performance of the automobile can be improved, the air pressure of the wheels can be changed timely when the vehicle runs under different road conditions, and the vehicle can continue to run for a certain distance when the tires are slightly deflated.

The knuckle shell assembly is a core part of a hub reduction gear assembly, the knuckle shell is usually used as a part of the hub reduction gear shell, an upper control arm mounting hole, a lower control arm mounting hole and a hub reduction gear transmission shaft hole are formed in a knuckle, and other structures such as a tire self-inflating hole and a tire self-inflating hole are formed in the center of a knuckle support shaft (also called a shaft neck and a shaft tube). In the manufacturing process of the existing steering knuckle shell assembly, one method is integral forging forming and reprocessing, and the requirements on the forging process and equipment are high; the other method is to divide the steering knuckle into a steering knuckle body and a support shaft, separately forge and form the steering knuckle body and the support shaft, and process the steering knuckle body and the support shaft after welding connection, wherein the welding process often causes the change of the structure and the performance of a welding joint, generates residual stress and deformation, and influences the quality and the bearing capacity of the structure. The two methods are both to machine the whole steering knuckle shell assembly, the turning radius of a workpiece is large, the load is eccentric, the machining process is complex, the dimensional accuracy stability is poor, special equipment is needed, and the cost is high.

In addition, in order to reasonably arrange the brake fluid pipe and the air pipe assembly and avoid the swing arm, the conventional knuckle shell assembly is additionally provided with a hole in the knuckle shell main body, the air pipe is led out from the edge position of the knuckle shell main body instead of being directly led out from the position corresponding to the end part of the supporting shaft, the processing method needs to align the position of the air hole and then punch, the processing difficulty is further improved, the arrangement of the air pipe assembly is limited to a certain extent, and the air pipe assembly needs to be arranged on the corresponding side of the air hole.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a split type threaded connection steering knuckle shell assembly, which greatly improves the processing manufacturability of the steering knuckle shell assembly, improves the processing quality, reduces the cost, can expand the reasonable arrangement position of an air pipe assembly, and provides more design choices.

In order to solve the technical problem, the split type threaded connection steering knuckle shell assembly comprises a steering knuckle shell, wherein a shaft tube is arranged on one side of the steering knuckle shell, a brake fluid hole and an air hole are axially formed in the shaft tube, the shaft tube is fixedly connected with the steering knuckle shell through a bolt, a sealing cavity is formed in the joint of the end surface of the shaft tube and the side surface of the steering knuckle shell, the end part of the air hole is communicated with the sealing cavity, an air injection channel is formed in the steering knuckle shell, one end of the air injection channel is communicated with the sealing cavity, and the other end of the air injection channel is led out from the edge of the steering knuckle shell and is communicated with an air tube assembly.

In above-mentioned split type threaded connection knuckle shell assembly, through the split type knuckle structure with the central siphon design for utilizing the bolt fastening, make the earlier components of a whole that can function independently of knuckle shell assembly forge, thermal treatment, machining, bolted connection fixed forming again, each part geometric dimensions's machining precision is stable, easily the accuse, thermal treatment can be good, in addition at the contact site of central siphon terminal surface and knuckle shell side, set up a sealed chamber, utilize gas injection way on the gas pocket on the sealed chamber intercommunication central siphon and the knuckle shell, make arranging the position of gas injection way nimble changeable, can design the swing arm according to actual demand and dodge, reduce the processing degree of difficulty, thereby effectively promote the processingquality of knuckle shell assembly, reduce the processing degree of difficulty and manufacturing cost.

As an improvement of the split type threaded connection steering knuckle shell assembly, an inner cavity is formed in one side of the top end of the steering knuckle shell, an upper support lug is arranged at the top of the inner cavity, a lower support lug is arranged at the bottom of the inner cavity, and the other end of the gas injection channel is led out from the bottom of the lower support lug. The air hole is led out from the bottom of the lower support lug to be connected with the air pipe assembly, so that the air pipe assembly thoroughly avoids the rotating space of the swing arm, the swing arm is not easy to damage, and the air pipe assembly is convenient to disassemble, assemble and inspect during maintenance.

As another improvement of the split type threaded connection steering knuckle shell assembly, a flange seat is arranged at the fixed end of the shaft tube, and a flange mounting groove is formed in the side face of the steering knuckle shell corresponding to the flange seat. The flange is fixed and installed firmly and is easy to transfer.

In foretell flange mounting groove structure, the tank bottom of flange mounting groove is provided with the recess, the notch of recess with the terminal surface laminating of central siphon is sealed, forms sealed chamber. Preferably, the grooves are annularly arranged around the axial center line of the shaft tube. The sealing cavity is annularly arranged for a circle around the shaft pipe, so that holes can be punched towards the center at any position on the outer edge of the steering knuckle shell, the communication of an inflation pipeline is realized, the arrangement of the gas pipe assembly is flexible and changeable, and the optimal arrangement mode is adopted according to the actual situation.

In conclusion, by adopting the steering knuckle shell assembly, the steering knuckle shell and the axle tube are assembled into the steering knuckle shell assembly through bolts after being processed in a split mode, the processing defects of the integral forging process difficulty and the split welding process in the prior art are overcome, the processing manufacturability and the heat treatment manufacturability are greatly improved, the processing quality is improved, the cost is reduced, and in addition, the air tube arrangement is more flexible.

Drawings

In the drawings:

fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partial sectional structure diagram of the present invention.

Fig. 3 is a schematic cross-sectional structure of the present invention.

Fig. 4 is a schematic structural view of a disassembled knuckle housing part of the present invention.

Fig. 5 is a partial structural view of the disassembled shaft tube of the present invention.

In the figure, 1, a knuckle housing; 11. a gas injection channel; 12. an inner cavity; 13. an upper lug; 14. a lower lug; 15. a flange mounting groove; 16. a groove; 17. a camshaft cylinder; 2. an axle tube; 21. a brake fluid bore; 22. air holes; 23. a flange seat; 24. a stepped blind hole; 3. sealing the cavity; 4. a gas pipe assembly; 5. positioning pins; 6. an oil pipe joint bolt; 7. a brake fluid tube assembly; 8. an anti-loosening ring; 91. a first seal member; 92. a second seal member; 93. a third seal member; 94. and a fourth seal.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto.

FIGS. 1-5 illustrate a split threaded knuckle-housing assembly of the present invention. As shown in fig. 1 and 2, the knuckle housing assembly includes a knuckle housing 1, one side of the knuckle housing 1 is provided with an axle tube 2, and the inside axial of the axle tube 2 is provided with a brake fluid hole 21 and an air hole 22, which is characterized in that the axle tube 2 is fixedly connected with the knuckle housing 1 through a bolt, a sealing cavity 3 is arranged at the joint of the end surface of the axle tube 2 and the side surface of the knuckle housing 1, the end of the air hole 22 is communicated with the sealing cavity 3, an air injection channel 11 is arranged inside the knuckle housing 1, one end of the air injection channel 11 is communicated with the sealing cavity 3, and the other end of the air injection channel 11 is led out from the edge of the knuckle housing 1 and is communicated with an air tube assembly 4.

Specifically, the steering knuckle shell 1 and the shaft tube 2 are subjected to processes of forging, heat treatment, machining and the like in a split mode, and due to the fact that the turning radius of each part is small, the load is uniform, machining is easy, the quality is high, and then the steering knuckle shell assembly is fixedly connected through bolts to be used conveniently. The edge at knuckle casing 1 is installed to tire self-inflating's trachea assembly 4, and trachea assembly 4 passes through gas injection way 11 and connects sealed chamber 3, and the air vent 22 at 2 middle parts of central siphon is again connected, utilizes the cavity structure in sealed chamber 3 as the transfer space of gas circuit, expands the position of arranging of gas injection way 11 to can design best trachea assembly 4 arrangement, make the dismouting easy, and rationally dodge swing arm swing space.

Optionally, as shown in fig. 1, an inner cavity 12 is disposed on one side of the top end of the knuckle housing 1, an upper support lug 13 is disposed on the top of the inner cavity 12, and a lower support lug 14 is disposed on the bottom of the inner cavity 12. As shown in fig. 3, the gas-injection duct 11 extends from the position of the knuckle housing 1 corresponding to the seal chamber 3 all the way to the radial direction, and the other end is led out from the bottom of the lower lug 14. The air pipe assembly 4 is arranged at the bottom of the lower support lug 14, the matching rotating space of the swing arm and the pin shaft is completely avoided, the joint is protected by the knuckle shell 1, the air pipe assembly is not easy to damage, and the air pipe assembly is very convenient to disassemble and assemble.

Optionally, as shown in fig. 2, a flange seat 23 is disposed at the fixed end of the axle tube 2, and a flange mounting groove 15 is disposed at a position corresponding to the flange seat 23 on the side surface of the knuckle housing 1. The embedded flange structure is adopted for connection, so that the connection is firmer and more convenient.

Because the axle housing 2 bears the braking torque and the vibration impact when the wheel rotates, a plurality of positioning pins 5 are also arranged between the flange seat 23 and the flange mounting groove 15, as shown in fig. 5 and fig. 2, the positioning pins 5 are arranged beside the flange screws of the flange seat 23, so that the shearing resistance and the overall strength are improved.

The shape and position of the upper sealed cavity 3 have various modes as long as the function of communication can be achieved. As shown in fig. 2, a groove 16 is formed at the bottom of the flange installation groove 15, and the notch of the groove 16 is tightly sealed with the end surface of the shaft tube 2 to form the sealing cavity 3. Further, the groove 16 is annularly arranged around the axial line of the shaft tube 2 to form an annular sealing cavity 3, so that the circumference of the edge of the knuckle housing 1 can be used as a leading-out end of the gas injection channel 11, and the arrangement of the gas injection channel 11 is very flexible. As shown in fig. 3, the sealing cavity 3 or the groove 16 is arc-shaped, so that the structural strength is higher, and the use requirement of high pressure is met, and the first sealing element 91 and the second sealing element 92 are respectively arranged on two sides of the notch of the groove 16, and specifically, an O-shaped sealing ring can be adopted to realize sealing.

Optionally, as shown in fig. 1 and fig. 2, an oil pipe joint bolt 6 is disposed at the fixed end of the axle tube 2, a through hole is formed in the center of the oil pipe joint bolt 6, one end of the through hole is communicated with a brake fluid hole 21, and the other end of the oil pipe joint bolt 6 penetrates through the knuckle housing 1 to extend out and is communicated with a brake fluid pipe assembly 7. The external brake fluid system continuously supplies brake fluid to the wheel-side brake system through the through-hole of the pipe joint bolt 6 and the brake fluid pipe 21.

As shown in fig. 2 and 3, a stepped blind hole 24 is formed in the end surface of the fixed end of the axle tube 2, the brake fluid hole 21 penetrates through the bottom surface of the stepped blind hole 24 and is communicated with the stepped blind hole 24, a protruding axle cylinder 17 is arranged on the side surface of the knuckle housing 1 corresponding to the stepped blind hole 24, the protruding axle cylinder 17 is embedded in the outer stepped hole of the stepped blind hole 24, and the oil pipe joint bolt 6 penetrates through the middle hole of the protruding axle cylinder 17 and is in threaded connection with the inner stepped hole of the stepped blind hole 24. The protruding shaft section of thick bamboo 17 of knuckle casing 1 is embedded into central siphon 2 earlier, then during oil pipe joint bolt 6 was embedded into protruding shaft section of thick bamboo 17 earlier, and screw thread fixed connection again saves brake fluid pipe assembly 7 and connects occupation space, forms the protection to oil pipe joint bolt 6 simultaneously, has higher joint strength.

The brake fluid circuit generally needs higher pressure for working, and the sealing of the joint needs to be ensured to be good, so a third sealing element 93 is arranged between the middle part of the oil pipe joint bolt 6 and the stepped hole on the inner side of the stepped blind hole 24, the oil pipe joint bolt 6 and the axle tube 2 are sealed from the part where the threads are finished, a fourth sealing element 94 is arranged between the convex shaft barrel 17 and the stepped hole on the outer side of the stepped blind hole 24, and the stepped blind hole 24 of the axle tube 2 is sealed again, so that no leakage is ensured. O-rings may be used as the third and fourth sealing members 93 and 94.

Optionally, as shown in fig. 1, an anti-loosening ring 8 is disposed on one side of the end portion of the oil pipe joint bolt 6 extending out of the knuckle housing 1, the anti-loosening ring 8 is fixed by a screw, and is close to the side surface of the fixed oil pipe joint bolt 6, and the oil pipe joint bolt 6 is mechanically loosened by the anti-loosening ring 8, so that loosening is reliable and durable.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.