Steering axle assembly and trailer

Abstract

The utility model discloses a steering axle assembly and a trailer. The steering axle assembly comprises an axle, two steering knuckles, a tie rod and a locking cylinder. The tie rod is arranged on one side of the axle and is parallel to the axle, a mounting plate is arranged on the axle, one end of the mounting plate is fixedly connected to the axle, the other end of the mounting plate extends to the side, away from the axle, of the tie rod, a limiting plate is connected to the other end of the mounting plate, and a limiting groove located in the side, away from the axle, of the tie rod is formed between the limiting plate and the mounting plate. An opening of the limiting groove faces the axle; a locking plate penetrating through the opening of the limiting groove is fixed to the transverse pull rod, and a lock hole is formed in the locking plate. The locking cylinder comprises a cylinder body and a piston rod, the cylinder body is fixedly connected to the mounting plate or the limiting plate, the piston rod can move between a first position and a second position in the longitudinal direction of the cylinder body, when the piston rod is located at the first position, the end of the piston rod is arranged in the lock hole, and when the piston rod is located at the second position, the end of the piston rod is separated from the lock hole.

Description

Technical Field

[0001] The utility model relates to the technical field of commercial vehicles, in particular to a steering axle assembly and a trailer. Background Art

[0002] The trailer is towed by a tractor, so the trailer's axle assembly is generally a non-powered driven axle, which is installed on the vehicle's suspension system to carry the vehicle's load. When it is necessary to reduce the overall turning radius of the trailer and tractor, it is necessary to configure steering knuckles at both ends of the trailer's axle assembly and install the wheel end assembly on the steering knuckle to form a steering axle.

[0003] The existing steering axle uses a steering kingpin to install the steering knuckle at the end of the axle. In order to ensure that the steering angles of the two wheel ends are consistent, a tie rod is connected between the two steering knuckles. The two ends of the tie rod are respectively hinged with the two steering knuckles. The tie rod is used to enable the two steering knuckles to swing synchronously, thereby keeping the steering angles of the two wheel ends consistent. When the road condition is good, in order to make the trailer travel more stable, the trailer axle does not need to be steered, which requires locking the tie rod to keep the steering knuckle and the axle relatively fixed. The existing structure is to lock the tie rod position through a cylinder installed on the axle and a locking plate on the tie rod. Specifically, the cylinder body of the cylinder is located between the axle and the tie rod. When locking, the piston rod of the cylinder is connected to the hole on the tie rod to lock the tie rod and the axle.

[0004] Since the distance between the axle and the tie rod is limited, when the load-bearing capacity of the axle assembly needs to be increased, the diameter of the axle needs to be increased, which will interfere with the cylinder body. In other words, the existing steering axle assembly is limited by the cylinder and it is difficult to increase the load-bearing capacity of the axle assembly by increasing the diameter of the axle. Utility Model Content

[0005] In view of the deficiencies in the prior art, the first object of the present invention is to provide a steering axle assembly, which can increase the diameter of the axle to improve the load-bearing capacity of the axle assembly.

[0006] The second purpose of the utility model is to provide a trailer.

[0007] In order to achieve the above purpose one, the utility model adopts the following technical solution:

[0008] A steering axle assembly includes an axle, two steering knuckles, a tie rod, and a locking cylinder;

[0009] The two steering knuckles are pivotally connected to the two ends of the axle through two steering kingpins, and each steering knuckle is provided with a connecting arm. The tie rod is placed on one side of the axle and arranged parallel to the axle, and the two ends of the tie rod are respectively hinged on the connecting arms of the two steering knuckles;

[0010] A mounting plate is provided on the axle, one end of the mounting plate is fixedly connected to the axle, the other end of the mounting plate extends to the side of the tie rod away from the axle, and a limiting plate is connected to the other end of the mounting plate, a limiting groove is formed between the limiting plate and the mounting plate, and the opening of the limiting groove is arranged toward the axle;

[0011] A locking plate is fixed on the tie rod and penetrates through the opening of the limit groove, and a locking hole is provided on the locking plate;

[0012] The locking cylinder includes a cylinder body and a piston rod installed on the cylinder body. The cylinder body is fixedly connected to a mounting plate or a limit plate. The piston rod can move between a first position and a second position along the longitudinal direction of the cylinder body. When the piston rod is in the first position, its end portion is placed in the locking hole. When the piston rod is in the second position, its end portion is disengaged from the locking hole.

[0013] The mounting plate is arranged across the top of the horizontal tie rod, and the limiting plate is formed by bending the outer end of the mounting plate.

[0014] The cylinder body of the locking cylinder is fixedly connected to the upper surface of the mounting plate, and the piston rod is downwardly penetrated and connected to the mounting plate.

[0015] A fixing seat is arranged on the axle, and the fixing seat comprises a bottom wall located below the axle, and two side walls extending upward from both sides of the bottom wall, the two side walls are respectively located on both sides of the axle, and the two side walls and the bottom wall are welded and fixed to the axle, and one end of the mounting plate is welded and fixed to the side wall close to the transverse tie rod.

[0016] The steering axle assembly also includes a reset component, which includes a connecting seat, two swing arms, and an elastic member. The connecting seat is fixed to the side wall of the fixing seat away from the transverse tie rod, the two swing arms are arranged opposite to each other, and the middle parts of the two swing arms are respectively pivoted on both sides of the connecting seat, and the elastic member is placed between the ends of the two swing arms away from the transverse tie rod; a mounting seat is fixed on the transverse tie rod, the mounting seat is placed between the ends of the two swing arms close to the transverse tie rod, and the two sides of the mounting seat are respectively in contact with the two swing arms.

[0017] The elastic member comprises two end seats and an air bag connected between the two end seats, and the two end seats are respectively hinged to one end of the two swing arms away from the transverse tie rod.

[0018] A limit rod located between the two swing arms is fixedly connected to the lower surface of the bottom wall of the fixing seat, and an adjusting bolt is screwed on both ends of the limit rod respectively. The two adjusting bolts cooperate with the opposite surfaces of the two swing arms respectively to limit the swing angle of the swing arm toward the limit rod.

[0019] The mounting seat includes a clamp sleeved on the transverse tie rod, a fixing block located between the transverse tie rod and the axle, a first locking bolt and a second locking bolt, the first locking bolt crosses both sides of the clamp opening and is screwed on the fixing block, the nut of the first locking bolt and the fixing block are respectively clamped on the outside of both sides of the clamp opening, the end of the locking plate close to the axle is fixedly connected to the fixing block by the second locking bolt, and the locking plate includes a first section extending upward, and a second section extending outward from the top of the first section across the transverse tie rod, and the locking hole is opened at the end of the second section away from the axle.

[0020] The locking hole is a waist-shaped hole, and its length direction is perpendicular to the length direction of the horizontal tie rod.

[0021] In order to achieve the above-mentioned second purpose, the utility model adopts the following technical solutions:

[0022] A trailer comprises the above-mentioned steering axle assembly.

[0023] The beneficial effects of the utility model are:

[0024] The utility model extends the mounting plate to the side of the tie rod away from the axle, and forms a limiting groove with an opening toward the axle on the portion of the mounting plate located on the outside of the tie rod, so that the locking plate on the tie rod extends outward from the opening of the limiting groove and is embedded in the limiting groove. In this way, when the mounting plate and the locking plate are locked by using the locking cylinder, at least the central axis of the locking cylinder can be placed on the side of the tie rod away from the axle, so that the locking cylinder is away from the central axis of the axle. In this way, when the outer diameter of the axle is increased, the axle will not interfere with the cylinder body of the locking cylinder, thereby improving the load-bearing capacity of the steering axle assembly by increasing the outer diameter of the axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 It is a cross-sectional view of the utility model;

[0027] Figure 3 for Figure 1 A-direction view. DETAILED DESCRIPTION

[0028] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0029] like Figure 1 , 2As shown in , 3, a steering axle assembly of the utility model comprises an axle 10, two steering knuckles 30, a tie rod 20, and a locking cylinder 40. The two steering knuckles 30 are respectively pivoted to the two ends of the axle 10 through two steering kingpins, so that the steering knuckles 30 can rotate relative to the axle 10. An axle head is installed on the steering knuckle, and a wheel end component of the axle assembly is arranged on the axle head. A connecting arm 31 extends from each steering knuckle 30, and the two connecting arms 31 are located on the same side of the axle 10. The tie rod 20 is placed on one side of the axle 10 and is arranged parallel to the axle 10. The two ends of the tie rod 20 are respectively pivoted to the connecting arms 31 of the two steering knuckles 30, and the tie rod 20 is used to make the two steering knuckles 30 rotate synchronously.A mounting plate 11 is provided on the axle 10, one end of which is fixedly connected to the axle 10, and the mounting plate 11 extends transversely toward the tie rod 20, so that the other end of the mounting plate 11 extends to the side of the tie rod 20 away from the axle 10. Specifically, one end of the mounting plate 11 is welded and fixed to the periphery of the axle 10, and is arranged horizontally, and the height of the mounting plate 11 is roughly the same as the central axis of the axle 10. The mounting plate 11 extends outward and straddles the top of the tie rod 20, and the other end of the mounting plate 11 is placed outward on the upper outer side of the tie rod 20 (that is, the side of the tie rod 20 away from the axle 10), and the mounting plate 11 protrudes from the outside of the tie rod 20. The size of the part can be suitable for arranging the locking cylinder 40. A limit plate 12 is provided at the other end of the mounting plate 11. The limit plate 12 can be formed by bending the mounting plate 11. Specifically, the outer part of the mounting plate 11 is bent downward to form a U-shape, and the lower part of the U-shape forms the limit plate 12. The limit plate 12 is arranged parallel to the mounting plate 11, and a limit groove is formed between the two. The opening of the limit groove faces inward, that is, the opening of the limit groove is arranged toward the axle 10, and then the opening is roughly toward the transverse tie rod 20; a locking plate 21 is fixed on the transverse tie rod 20, and the locking plate 21 extends outward and penetrates into the limit groove through the opening of the limit groove. In this way, the locking plate 21 is placed between the above-mentioned mounting plate 11 and the limit plate 12, and a locking hole 211 is provided on the locking plate 21; the locking cylinder 40 includes a cylinder body 41 and a piston rod 42 installed on the cylinder body 41, the cylinder body 41 is fixedly connected to the upper surface of the mounting plate 11, the longitudinal direction of the cylinder body 41 is consistent with the height direction, that is, the cylinder body 41 is vertically arranged on the mounting plate 11, and the piston rod 42 can move between the first position and the second position along the longitudinal direction of the cylinder body 41 under the push of the internal pressure of the cylinder body 41. When the piston rod 42 is in the first position, its end portion passes through the mounting plate 11 and extends into the locking hole 211, and a locking pin is formed by the end portion of the piston rod 42. , lock the locking plate 21 and the mounting plate 11, and limit the freedom of the locking plate 21 and the mounting plate 11 to move axially on the axle 10. At this time, the locking plate 21 cooperates with the piston rod 42 to limit the freedom of the tie rod 20 to move relative to the axle 10, and the steering axle assembly will not have the self-steering function in this state; when the piston rod 42 is in the second position, its end moves upward and disengages from the locking hole 211. At this time, the locking plate 21 is no longer limited by the piston rod 42, and it can move left and right inside the limiting groove between the mounting plate 11 and the limiting plate 12, so that the tie rod 20 can move freely relative to the axle 10. At this time, the steering axle assembly has the self-steering function.

[0030] In the utility model, since the mounting plate 11 is extended to the side of the tie rod 20 away from the axle 10, and a limit groove with an opening toward the axle is formed on the portion of the mounting plate 11 located on the outside of the tie rod 20, the locking plate on the tie rod 20 extends outward from the opening of the limit groove and is embedded in the limit groove. In this way, when the mounting plate 11 and the locking plate 21 are locked by the locking cylinder, at least the central axis of the locking cylinder 40 can be placed on the side of the tie rod 20 away from the axle 10, so that the locking cylinder 40 is away from the central axis of the axle 10. In this way, when the outer diameter of the axle 10 is increased, the axle 10 will not interfere with the cylinder body 41 of the locking cylinder 40, so that the load-bearing capacity of the steering axle assembly can be improved by increasing the outer diameter of the axle.

[0031] It should be noted that the locking cylinder 40 of the present invention may be a pneumatic cylinder, an oil cylinder, or an electric cylinder.

[0032] In the above-mentioned embodiment, the mounting plate 11 is arranged across the tie rod 20, and the limit plate 11 is formed by bending the portion of the mounting plate 11 located above the tie rod 20 downward. The mounting plate 11 is bent into a U-shape, so that the limit plate 12 formed on one side of the U-shape is parallel to the mounting plate 11. Under the condition that the locking plate 21 can move along the axial direction of the axle 10 in the limit groove, the limit groove can be used to set the upper and lower limits of the locking plate 21. In other embodiments, the mounting plate 11 can be arranged to be located below the tie rod 20, that is, the mounting plate 11 is arranged across the bottom of the tie rod 20, and the portion of the mounting plate 11 located below the tie rod 20 is bent upward to form a U-shape, so that the limit plate 12 is located above the mounting plate 11. In this embodiment, the cylinder body of the locking cylinder 40 can be installed below the mounting plate 11, or the cylinder body of the locking cylinder 40 can be installed above the limit plate 12.

[0033] exist Figure 1 , 2 In the structure shown, the cylinder body 41 of the locking cylinder 40 is fixed on the upper surface of the mounting plate 11. Specifically, the flange at the bottom of the locking cylinder 40 can be fixed to the mounting plate 11 using multiple bolts, and the piston rod 42 is downwardly connected to the mounting plate 11. After the piston rod 42 moves downward, its end portion can be inserted into the locking hole 211 of the locking plate 21.

[0034] A fixing seat 13 is also provided on the axle 10, and the fixing seat 13 can facilitate connecting the mounting plate 11 to the cylindrical axle 10. The fixing seat 13 can be a channel steel, which includes a bottom wall 131 located below the axle 10, and two side walls 132 extending upward from both sides of the bottom wall 131. The two side walls 132 are respectively located on both sides of the axle 10. The two side walls 132 and the bottom wall 131 are welded and fixed to the axle 10. A vertical plane is formed on the side of the axle 10 close to the tie rod 20 through one of the side walls 132. In this way, the end of the mounting plate 11 close to the axle 10 can be docked on the vertical plane on one of the side walls 132, so that the mounting plate 11 is fixed to the axle 10. In addition, the steering axle assembly of the utility model also includes a reset component 50, which includes a connecting seat 51, two swing arms 52, and an elastic member 53. The connecting seat 51 is fixed on the side wall 132 of the fixing seat 13 away from the transverse tie rod 20. The two swing arms 52 are arranged opposite to each other, and the middle parts of the two swing arms 52 are respectively pivoted on both sides of the connecting seat 51. The elastic member 53 is placed between the ends of the two swing arms 52 away from the transverse tie rod 20, and the two ends of the elastic member 53 are respectively connected to the ends of the two swing arms 52. A mounting seat is fixedly connected to the transverse tie rod 20, and the mounting seat is placed between the ends of the two swing arms 52 close to the transverse tie rod 20, and the two sides of the mounting seat are respectively abutted against the ends of the two swing arms 52. When turning, the tie rod 20 moves along the axial direction of the axle 10, driving the mounting seat to squeeze one of the swing arms 52, so that the two swing arms 52 swing under the squeezing of the mounting seat. At this time, the elastic member 53 is compressed, which will generate an elastic stress that causes the swing arm 52 to swing in the opposite direction, so that the swing arm 52 tends to swing in the opposite direction. When the trailer resumes straight driving, the above elastic stress pushes the swing arm 52 to reset, so that the swing arm 52 returns to the initial position, and then the tie rod 20 returns to the initial position. The above elastic member 53 can be composed of two end seats 531 and an air bag 532 located between the two end seats 531, and the two end seats 531 are respectively hinged to one end of the two swing arms 52 away from the tie rod 20. Of course, in other embodiments, the elastic member 53 can also be a spring, an elastic rubber block, etc. A limit rod 14 is fixedly connected to the lower surface of the bottom wall 131 of the fixing seat 13, and the limit rod 14 is located between the two swing arms 52. An adjusting bolt 15 is screwed on both ends of the limit rod 14, respectively. The two adjusting bolts 15 cooperate with the two swing arms 52, respectively, to limit the maximum swing angle of the swing arm 52 toward the limit rod 14. Specifically, when the swing arm 52 swings to the maximum angle toward the limit rod 14, the swing arm 52 abuts against the adjusting bolt 15, and it cannot continue to swing toward the limit rod 14. By rotating the adjusting bolt 15, the overall length of the adjusting bolt 15 and the limit rod 14 can be adjusted, so as to adjust the maximum swing angle of the swing arm 52, and then adjust the maximum steering angle of the steering axle assembly.

[0035] The mounting seat comprises a clamp 23 sleeved on the tie rod 20, a fixing block 22 located between the tie rod 20 and the axle 10, a first locking bolt 24 and a second locking bolt 25. The first locking bolt 24 passes through both sides of the opening of the clamp 23 and is screwed onto the fixing block 22 after passing through the clamp 23. The first locking bolt 24 is tightened, and the two sides of the opening of the clamp 23 are clamped by the nut and the fixing block 22 respectively, so that the clamp 23 is locked on the tie rod 20 and the second locking bolt 25 is locked. The fixing block 22 is fixed to the transverse tie rod 20, and the locking plate 21 is connected to the fixing block 22. Specifically, the locking plate 21 includes a first section extending upward from the upper surface of the fixing block 22, and a second section extending outward from the top of the first section and spanning above the transverse tie rod 20. The second locking bolt 25 passes through the fixing block 22 from bottom to top and is screwed on the first section of the locking plate 21 to fix the locking plate 21 to the fixing block 22. The locking hole 211 is opened on the second section of the locking plate 21.

[0036] In the present invention, the locking hole 211 can be set as a waist-shaped hole, and its length direction is perpendicular to the length direction of the tie rod 20. In this way, the end of the piston rod 42 can be easily inserted. At the same time, in the length direction of the axle 10 and the tie rod 20, the matching clearance between the piston rod 42 and the locking hole 211 is ensured to be small, so that when the steering function is locked, the swing of the tie rod 20 can be avoided as much as possible.

[0037] The trailer of the utility model comprises the above-mentioned steering axle assembly, and other structures of the trailer are the same as those in the prior art and will not be described in detail here.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A steering axle assembly, characterized in that: Includes axle, two steering knuckles, tie rods, locking cylinder; The two steering knuckles are pivotally connected to the two ends of the axle through two steering kingpins, and each steering knuckle is provided with a connecting arm. The tie rod is placed on one side of the axle and arranged parallel to the axle, and the two ends of the tie rod are respectively hinged on the connecting arms of the two steering knuckles; A mounting plate is provided on the axle, one end of the mounting plate is fixedly connected to the axle, the other end of the mounting plate extends to the side of the tie rod away from the axle, and a limiting plate is connected to the other end of the mounting plate, a limiting groove is formed between the limiting plate and the mounting plate, and the opening of the limiting groove is arranged toward the axle; A locking plate is fixed on the tie rod and penetrates through the opening of the limit groove, and a locking hole is provided on the locking plate; The locking cylinder includes a cylinder body and a piston rod installed on the cylinder body. The cylinder body is fixedly connected to a mounting plate or a limit plate. The piston rod can move between a first position and a second position along the longitudinal direction of the cylinder body. When the piston rod is in the first position, its end portion is placed in the locking hole. When the piston rod is in the second position, its end portion is disengaged from the locking hole.

2. The steering axle assembly according to claim 1, characterized in that: The mounting plate is arranged across the top of the horizontal tie rod, and the limiting plate is formed by bending the outer end of the mounting plate.

3. The steering axle assembly according to claim 2, characterized in that: The cylinder body of the locking cylinder is fixedly connected to the upper surface of the mounting plate, and the piston rod is downwardly penetrated and connected to the mounting plate.

4. The steering axle assembly according to claim 1, characterized in that: A fixing seat is arranged on the axle, and the fixing seat comprises a bottom wall located below the axle, and two side walls extending upward from both sides of the bottom wall, the two side walls are respectively located on both sides of the axle, and the two side walls and the bottom wall are welded and fixed to the axle, and one end of the mounting plate is welded and fixed to the side wall close to the transverse tie rod.

5. The steering axle assembly according to claim 4, characterized in that: The steering axle assembly also includes a reset component, which includes a connecting seat, two swing arms, and an elastic member. The connecting seat is fixed to the side wall of the fixing seat away from the transverse tie rod, the two swing arms are arranged opposite to each other, and the middle parts of the two swing arms are respectively pivoted on both sides of the connecting seat, and the elastic member is placed between the ends of the two swing arms away from the transverse tie rod; a mounting seat is fixed on the transverse tie rod, the mounting seat is placed between the ends of the two swing arms close to the transverse tie rod, and the two sides of the mounting seat are respectively in contact with the two swing arms.

6. The steering axle assembly according to claim 5, characterized in that: The elastic member comprises two end seats and an air bag connected between the two end seats, and the two end seats are respectively hinged to one end of the two swing arms away from the transverse tie rod.

7. The steering axle assembly according to claim 5, characterized in that: A limit rod located between the two swing arms is fixedly connected to the lower surface of the bottom wall of the fixing seat, and an adjusting bolt is screwed on both ends of the limit rod respectively. The two adjusting bolts cooperate with the opposite surfaces of the two swing arms respectively to limit the swing angle of the swing arm toward the limit rod.

8. The steering axle assembly according to claim 5, characterized in that: The mounting seat includes a clamp sleeved on the transverse tie rod, a fixing block located between the transverse tie rod and the axle, a first locking bolt and a second locking bolt, the first locking bolt crosses both sides of the clamp opening and is screwed on the fixing block, the nut of the first locking bolt and the fixing block are respectively clamped on the outside of both sides of the clamp opening, the end of the locking plate close to the axle is fixedly connected to the fixing block by the second locking bolt, and the locking plate includes a first section extending upward, and a second section extending outward from the top of the first section across the transverse tie rod, and the locking hole is opened at the end of the second section away from the axle.

9. The steering axle assembly according to claim 8, characterized in that: The locking hole is a waist-shaped hole, and its length direction is perpendicular to the length direction of the horizontal tie rod.

10. A trailer, characterized in that: The invention comprises the steering axle assembly as described in any one of claims 1 to 9.

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