Pull rod assembly

Abstract

The invention discloses a pull rod assembly, and belongs to the technical field of steering systems. A pull rod assembly comprises a transverse pull rod, a ball head pull rod and an adjusting assembly. The transverse pull rod and the ball head pull rod are oppositely arranged at the two ends, and the left end of the transverse pull rod is fixedly arranged; the adjusting assembly comprises a mounting pipe and a movable rod; the left end of the mounting pipe is in threaded connection with the right end of the tie rod; the right end of the movable rod is in threaded connection with the left end of the bulb tie rod; the left end of the movable rod is movably nested in the right end of the mounting pipe, so that the movable rod can be axially far away from or close to the mounting pipe; the movable rod is fastened and connected with the nested part of the mounting pipe through a hoop; the operation steps of adjusting the toe-in value of the pull rod can be reduced, and the dismounting efficiency is improved; meanwhile, the change degree of single-time distance adjustment is refined, accurate adjustment can be achieved, and operation is more labor-saving and easier.

Description

Technical Field

[0001] The present invention belongs to the technical field of steering systems, and more particularly, relates to a tie rod assembly. Background Art

[0002] As an important component of the vehicle's steering system, the tie rod is used by connecting the left and right steering arms. Its function is to synchronize the two wheels and adjust the toe in synchronously. The end of the tie rod needs to be connected to the steering knuckle through a ball joint. The existing tie rod and the ball rod are connected to each other through threads. When the ball rod is replaced, the length of the new ball rod may not be the same as the original ball rod, and the ball rod has moved. The distance between the ball rod and the tie rod needs to be adjusted to adjust the toe value of the front wheel, that is, the distance between the ball rod and the tie rod. However, due to the lack of a distance judgment device, maintenance personnel can only determine the distance the ball rod needs to move by direct observation or marking. This method makes it difficult to adjust the toe value. If the retraction distance of the ball rod is too long or too short, multiple adjustments are required. For example, the patent document with application number CN201710769365.4 (application date: August 31, 2017) discloses an integral steering tie rod assembly, which, by providing a toe-in modulator, has the same spiral rotation direction of the tie rods at both ends of the integral steering tie rod assembly, one end of the tie rod is fixed to the ball pin seat and does not change, and the other end of the tie rod is connected to the ball pin seat through the toe-in modulator, thereby simplifying the structure of the integral steering tie rod assembly, reducing weight, and making toe adjustment easy, quick, and convenient; however, the invention discloses a method for adjusting the toe-in modulator to simplify the structure of the integral steering tie rod assembly, reducing weight, and making toe adjustment easy, quick, and convenient; The following defects exist: 1. When adjusting the toe-in, it is necessary to first loosen the large locking nut and the small locking nut, then use a wrench to clamp the hexagon of the toe-in modulator, and adjust the toe-in value by rotating the toe-in modulator. Each adjustment requires tightening or loosening multiple nuts. At the same time, the wrench may be blocked by other parts, which seriously affects the disassembly efficiency; 2. When adjusting the toe-in modulator, the distance between the ball pins changes exponentially, and the single change in distance is large, making it difficult to accurately adjust the distance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a pull rod assembly, which can reduce the operating steps of the pull rod when adjusting the toe value and improve the disassembly efficiency; at the same time, it refines the degree of change of a single distance adjustment, can achieve precise adjustment and make the operation more labor-saving and easy.

[0004] The present invention provides a tie rod assembly, which includes a transverse tie rod, a ball head tie rod and an adjustment component; the transverse tie rod and the ball head tie rod are arranged at both ends facing each other, and the left end of the transverse tie rod is fixed; the adjustment component includes a mounting tube and a movable rod; the left end of the mounting tube is threadedly connected to the right end of the transverse tie rod, and the right end of the movable rod is threadedly connected to the left end of the ball head tie rod; the left end of the movable rod is movably nested inside the right end of the mounting tube, so that the movable rod can axially move away from or approach the mounting tube; the movable rod and the mounting tube are fastened together at the nesting point by a clamp.

[0005] As a further improvement of the present invention, the adjustment assembly also includes a mounting ring, a mounting frame, an adjustment plate and an adjustment rod; the mounting ring is fixedly nested and arranged on the outer side of the transverse rod, and the mounting ring protrudes radially outward; one end of the mounting frame is fixedly connected to the upper side surface of the mounting ring, and the other end extends axially along the transverse rod; the first adjustment gear and the second adjustment gear are symmetrically arranged on the left and right sides of the mounting frame; an adjustment groove is provided on the mounting frame; an adjustment rod is fixedly provided on the lower side surface of the adjustment plate, and the adjustment rod is embedded in the adjustment groove; the lower end of the adjustment rod is fixedly connected to the outer side surface of the movable rod; an axially penetrating limit groove is provided on the surface of the mounting tube; an upper rack and a lower rack are respectively provided at both ends of the adjustment plate, the upper rack is engaged and rotated with the first adjusting gear, and the lower rack is engaged and rotated with the second adjusting gear.

[0006] As a further improvement of the present invention, the clamp includes a clamp ring, a clamping bolt and a clamping rod; the clamp ring includes an annular clamping portion and an extension portion; the clamping portion is arranged around the outside of the mounting tube; the extension portion extends radially along the outside of the clamping portion, and the clamping bolt is threadedly connected to the extension portion so that the clamp ring can shrink inward; the clamping rod is fixedly arranged on the side of the clamp ring and is located at the connection between the clamping portion and the extension portion; the clamping rod includes two, which are symmetrically arranged on both sides of the clamp ring; the clamping rod extends into the limit groove, and the lower end of the adjusting rod is symmetrically provided with a protective groove; when the clamp is locked, the clamping rod and the protective groove are clamped with each other, and when the clamp is unlocked, the clamping rod is extended toward both sides of the protective groove.

[0007] As a further improvement of the present invention, the clamp is arranged at the outermost side of the mounting tube, and the height of the extended portion of the clamp ring extending upward does not exceed the lower side of the mounting frame.

[0008] As a further improvement of the present invention, a first mounting hole is opened on the right end of the transverse tie rod, and an internal thread is provided in the first mounting hole; a first threaded rod is fixedly provided on the left side of the mounting tube, and the first threaded rod is provided with an external thread, and the first mounting hole and the first threaded rod are threadedly connected.

[0009] As a further improvement of the present invention, a second mounting hole is opened on the left end of the ball head pull rod, and an internal thread is provided in the second mounting hole; a second threaded rod is fixedly provided on the right side of the movable rod, and the second threaded rod is provided with an external thread, and the second mounting hole and the second threaded rod are threadedly connected.

[0010] As a further improvement of the present invention, the center lines of the transverse tie rod, the ball head tie rod and the adjustment assembly are collinear; the center of the ball head tie rod is located on the center line.

[0011] As a further improvement of the present invention, both sides of the mounting frame extend upward respectively, and the upper rack and the lower rack abut against the side walls of the mounting frame respectively.

[0012] As a further improvement of the present invention, it also includes a cover; the cover is fixedly arranged on the upper side of the mounting frame, and a through movable groove is opened on the cover, the movable groove is located directly above the adjustment groove, and the movable groove and the adjustment groove are located on the same straight line; the upper end of the adjustment rod abuts against the side wall of the movable groove.

[0013] As a further improvement of the present invention, a zero scale line is provided at the center of the cover, and the scale lines to the right along the moving groove are positive scale lines, and the scale lines to the left along the moving groove are negative scale lines.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up an adjustment component, releasing the lock of the mounting tube and the movable rod through the clamp, moving the adjustment plate left and right, and the adjustment rod drives the movable rod to move, so as to adjust the retraction distance of the movable rod inside the mounting tube, the operation steps of adjusting the toe value of the tie rod can be reduced, thereby improving the disassembly efficiency. At the same time, the degree of change of a single distance adjustment is refined, which can achieve precise adjustment and make the operation more labor-saving and easy.

[0015] 2. By setting up a clamping rod, the movable rod cannot move in the mounting tube when the clamp is locked. When the clamp is unlocked, the clamping rod expands to both sides of the limit groove, losing the limit contact, and the adjustment rod can slide between the clamping rod, thereby improving the locking stability of the movable rod and preventing the adjustment rod from moving slightly after the clamp is locked. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 An exploded view of the present invention; Figure 3 It is a structural schematic diagram of the adjustment component of the present invention; Figure 4 This is a schematic structural diagram of a second specific embodiment of the present invention; Figure 5 It is an enlarged view of the second specific embodiment of the present invention; Figure 6 This is a schematic structural diagram of a clamp according to a second specific embodiment of the present invention; Figure 7 This is a structural diagram of a second specific embodiment of the present invention when the holding rod is separated from the protection groove; Figure 8 This is a schematic structural diagram of a third specific embodiment of the present invention.

[0017] Description of the numbers in the figure: Tie rod 1, first mounting hole 11, ball joint connecting rod 2, second mounting hole 21, adjustment assembly 3, mounting tube 31, first threaded rod 311, limiting groove 312, movable rod 32, second threaded rod 321, mounting ring 33, mounting frame 34, adjustment groove 35, adjustment plate 36, upper rack 361, lower rack 362, first adjustment gear 37, second adjustment gear 38, adjustment rod 39, clamp 4, clamp ring 41, clamping bolt 42, clamping rod 43, protective groove 5, cover 6, movable groove 61. DETAILED DESCRIPTION

[0018] Specific embodiment 1: Please refer to Figure 1-Figure 3 A tie rod assembly includes a tie rod 1, a ball head tie rod 2 and an adjustment component 3.

[0019] The tie rod 1 and the ball joint tie rod 2 are arranged at both ends facing each other, and the left end of the tie rod 1 is fixed. The adjustment assembly 3 includes a mounting tube 31 and a movable rod 32. The left end of the mounting tube 31 is threadedly connected to the right end of the tie rod 1, and the right end of the movable rod 32 is threadedly connected to the left end of the ball joint tie rod 2. The left end of the movable rod 32 is movably nested inside the right end of the mounting tube 31, so that the movable rod 32 can axially move away from or close to the mounting tube 31. The mounting tube 31 is a hollow structure, and the movable rod 32 is embedded in the mounting tube 31. The movable rod 32 and the mounting tube 31 are tightly connected at the nesting point by a clamp 4.

[0020] like Figure 2 As shown in , in this embodiment, a first mounting hole 11 is formed on the right end of the transverse tie rod 1, and an internal thread is provided in the first mounting hole 11. A first threaded rod 311 is fixedly provided on the left side of the mounting tube 31, and the first threaded rod 311 is provided with an external thread, and the first mounting hole 11 and the first threaded rod 311 are threadedly connected. A second mounting hole 21 is formed on the left end of the ball tie rod 2, and an internal thread is provided in the second mounting hole 21. A second threaded rod 321 is fixedly provided on the right side of the movable rod 32, and the second threaded rod 321 is provided with an external thread, and the second mounting hole 21 and the second threaded rod 321 are threadedly connected.

[0021] After installation, the centerlines of the tie rod 1, ball rod 2, and adjustment assembly 3 are aligned. The center of the ball of the ball rod 2 lies on this centerline. After the tie rod 1, mounting tube 31, ball rod 2, and movable rod 32 are installed, they are each secured with a hexagonal nut. It should be noted that a ball pin is installed at the right end of the ball rod 2 to connect it to other automotive components. This is a conventional technique, and its specific connection relationship and operating principle will not be elaborated here.

[0022] Furthermore, the adjustment assembly 3 also includes a mounting ring 33, a mounting bracket 34, an adjustment plate 36, and an adjustment rod 39. The mounting ring 33 is fixedly nested and disposed on the outside of the tie rod 1. The mounting ring 33 protrudes radially outward and is located to the left of the hexagonal nut. The outer diameter of the mounting ring 33 is larger than the outer diameter of the hexagonal nut.

[0023] One end of the mounting bracket 34 is fixedly connected to the upper side of the mounting ring 33, and the other end extends axially along the tie rod 1. A first adjustment gear 37 and a second adjustment gear 38 are symmetrically positioned on the left and right sides of the mounting bracket 34. An adjustment slot 35 is defined in the mounting bracket 34, located between the first and second adjustment gears 37, 38.

[0024] An adjustment rod 39 is fixedly mounted on the underside of the adjustment plate 36. The upper end of the adjustment rod 39 protrudes outward from the adjustment plate 36 and is embedded in the adjustment slot 35, allowing the adjustment rod 39 to move horizontally along the adjustment slot 35. The lower end of the adjustment rod 39 is fixedly connected to the outer side of the movable rod 32, thereby driving the horizontal movement of the movable rod 32. An axially extending limit slot 312 is formed on the surface of the mounting tube 31. The limit slot 312 has at least one opening facing the right end of the mounting tube 31, connecting the limit slot 312 to the external space.

[0025] An upper rack 361 and a lower rack 362 are provided at each end of the adjustment plate 36. The upper rack 361 is located on the upper left side of the adjustment plate 36, while the lower rack 362 is located on the lower right side of the adjustment plate 36. The upper rack 361 rotates in mesh with the first adjustment gear 37, while the lower rack 362 rotates in mesh with the second adjustment gear 38. Preferably, the mounting bracket 34 has two sides extending upward, with the upper rack 361 and the lower rack 362 respectively abutting against the side walls of the mounting bracket 34. The upper rack 361 and the lower rack 362 move with the adjustment plate 36.

[0026] The clamp 4 includes a clamp ring 41 and a clamping bolt 42. The clamp ring 41 includes an annular clamping portion and an extension portion. The clamping portion is arranged around the outside of the mounting tube 31. The extension portion extends radially along the outside of the clamping portion, and the clamping bolt 42 is threadedly connected to the extension portion. The clamp ring 41 is forced to shrink inward by the clamping bolt 42, causing the mounting tube 31 to deform slightly inward, so that the mounting tube 31 and the movable rod 32 can form a tight integrated structure. The clamp 4 is arranged at the outermost side of the mounting tube 31, and the extension portion of the clamp ring 41 extends upward to a height not exceeding the lower side of the mounting frame 34, providing space for the clamping bolt 42 to be disassembled and installed.

[0027] Specific embodiment 2: Please refer to Figure 4-Figure 7 This embodiment also provides a pull rod assembly, and its similarities with the specific embodiment 1 are not repeated here. The difference is that: the clamp 4 also includes a clamping rod 43.

[0028] like Figure 5 As shown, the clamping rods 43 are fixed to the side of the clamping ring 41, located at the junction of the clamping portion and the extension portion. The clamping rods 43 comprise two symmetrical rods, one symmetrically positioned on either side of the clamping ring 41, and extend into the adjustment slot 35. The lower end of the adjustment rod 39 is symmetrically defined with protective slots 5, the height of which matches that of the clamping rods 43. In this embodiment, the protective slots 5 are symmetrically positioned notches. When the clamping ring 4 is locked, the clamping rods 43 on either side move toward the protective slots 5, engaging with each other, with the upper sides of the clamping rods 43 abutting against the upper sides of the protective slots 5. When the clamping ring 4 is unlocked, the clamping rods 43 extend toward the sides of the protective slots 5. The provision of the clamping rods 43 prevents slippage or displacement after the clamping operation, ensuring the stability of the entire pull rod assembly even under severe loads.

[0029] Specific embodiment three: please refer to Figure 8 This embodiment also provides a pull rod assembly, the similarities with the second embodiment will not be repeated here, the difference is that it also includes a cover 6. The cover 6 is fixedly set on the upper side of the mounting frame 34, and a through movable groove 61 is opened on the cover 6. The movable groove 61 is located directly above the adjustment groove 35, and the movable groove 61 and the adjustment groove 35 are located on the same straight line. The cover 6 at least covers the area where the adjustment groove 35 is located. The upper end of the adjustment rod 39 abuts against the side wall of the movable groove 61, and the upper end of the adjustment rod 39 protrudes toward the outside of the movable groove 61. The adjustment plate 36 is moved by pushing the protruding adjustment rod 39. By providing the cover 6, an isolation and sealing effect is played to prevent the intrusion of water or dust and dirt, thereby improving the service life of the components.

[0030] A zero scale line is set at the center of the cover 6. A positive scale line is marked to the right along the movable groove 61, while a negative scale line is marked to the left along the movable groove 61. This facilitates maintenance personnel to quickly determine when adjusting the vehicle's toe value. When the scale line is moved to a negative position, the distance between the tie rod 1 and the ball joint tie rod 2 decreases, and the vehicle's toe value increases; conversely, when the scale line is moved to a positive position, the distance between the tie rod 1 and the ball joint tie rod 2 increases, and the vehicle's toe value decreases.

[0031] Working principle: When adjusting the toe-in of the vehicle or replacing a new ball joint tie rod 2; connect the first threaded rod 311 of the mounting tube 31 with the first mounting hole 11 of the transverse tie rod 1, and connect the second threaded rod 321 of the movable rod 32 with the second mounting hole 21 of the ball joint tie rod 2; unlock the clamp 4, and unfold the clamping rod 43 toward both sides of the protective groove 5, and the clamp 4 releases the lock of the mounting tube 31 and the movable rod 32, and move the adjustment plate 36 left and right, and the adjustment rod 39 drives the movable rod 32 to move to adjust the retraction distance of the movable rod 32 inside the mounting tube; when it moves to the negative scale, the distance between the transverse tie rod 1 and the ball joint tie rod 2 is shortened, and the toe-in value of the vehicle is increased; When it moves to the positive scale, the distance between the transverse tie rod 1 and the ball head tie rod 2 increases, and the toe value of the vehicle decreases; it is convenient for maintenance personnel to make quick judgments; it can reduce the operating steps of the tie rod when adjusting the toe value, and improve the disassembly efficiency; at the same time, the degree of change of a single distance adjustment is refined, which can achieve precise adjustment and make the operation more labor-saving and easy; when the adjustment is completed, the clamp 4 is locked. When the clamp 4 is locked, the movable rod 32 cannot move in the mounting tube 31, and the adjusting rod 39 can slide with the clamping rod 43 to improve the locking stability of the movable rod 32 and prevent the adjusting rod 39 from moving slightly after the clamp 4 is locked.

Claims

1. A tie rod assembly, characterized in that: The invention comprises a transverse tie rod (1), a ball tie rod (2) and an adjustment assembly (3); the transverse tie rod (1) and the ball tie rod (2) are arranged at opposite ends, and the left end of the transverse tie rod (1) is fixed; the adjustment assembly (3) comprises a mounting tube (31) and a movable rod (32); the left end of the mounting tube (31) is threadedly connected to the right end of the transverse tie rod (1), and the right end of the movable rod (32) is threadedly connected to the left end of the ball tie rod (2); the left end of the movable rod (32) is movably nested inside the right end of the mounting tube (31), so that the movable rod (32) can axially move away from or close to the mounting tube (31); the movable rod (32) and the mounting tube (31) are fastened together at the nesting position by a clamp (4).

2. The tie rod assembly according to claim 1, characterized in that: The adjustment assembly (3) further comprises a mounting ring (33), a mounting frame (34), an adjustment plate (36) and an adjustment rod (39); the mounting ring (33) is fixedly nested and arranged on the outer side of the transverse tie rod (1), and the mounting ring (33) protrudes radially outward; one end of the mounting frame (34) is fixedly connected to the upper side of the mounting ring (33), and the other end extends axially along the transverse tie rod (1); the first adjustment gear (37) and the second adjustment gear (38) are symmetrically arranged on the left and right sides of the mounting frame (34); an adjustment slot (35) is provided on the mounting frame (34) An adjusting rod (39) is fixedly provided on the lower side of the adjusting plate (36), and the adjusting rod (39) is embedded in the adjusting groove (35); the lower end of the adjusting rod (39) is fixedly connected to the outer side of the movable rod (32); an axially penetrating limiting groove (312) is provided on the surface of the mounting tube (31); an upper rack (361) and a lower rack (362) are respectively provided at both ends of the adjusting plate (36), the upper rack (361) is meshed and rotated with the first adjusting gear (37), and the lower rack (362) is meshed and rotated with the second adjusting gear (38).

3. The tie rod assembly according to claim 2, characterized in that: The clamping hoop (4) comprises a clamping ring (41), a clamping bolt (42) and a clamping rod (43); the clamping ring (41) comprises an annular clamping portion and an extension portion; the clamping portion is arranged around the outer side of the mounting tube (31); the extension portion extends radially along the outer side of the clamping portion, and the clamping bolt (42) is threadedly connected to the extension portion so that the clamping ring (41) can be retracted inwardly; the clamping rod (43) is fixedly arranged on the side of the clamping ring (41) and is located at the connection between the clamping portion and the extension portion; the clamping rod (43) comprises two, which are symmetrically arranged on both sides of the clamping ring (41); the clamping rod (43) extends into the limiting groove (312), and the lower end of the adjustment rod (39) is symmetrically provided with a protective groove (5); when the clamping hoop (4) is locked, the clamping rod (43) and the protective groove (5) are mutually engaged, and when the clamping hoop (4) is unlocked, the clamping rod (43) is unfolded toward both sides of the protective groove (5).

4. The tie rod assembly according to claim 3, characterized in that: The clamp (4) is arranged at the outermost side of the mounting tube (31), and the height of the extended portion of the clamp ring (41) extending upward does not exceed the lower side of the mounting frame (34).

5. The tie rod assembly according to claim 1, characterized in that: A first mounting hole (11) is provided on the right end of the cross-tie rod (1), and an internal thread is provided in the first mounting hole (11); a first threaded rod (311) is fixedly provided on the left side of the mounting tube (31), and the first threaded rod (311) is provided with an external thread, and the first mounting hole (11) and the first threaded rod (311) are threadedly connected.

6. The tie rod assembly according to claim 1, characterized in that: A second mounting hole (21) is provided on the left end of the ball head pull rod (2), and an internal thread is provided in the second mounting hole (21); a second threaded rod (321) is fixedly provided on the right side of the movable rod (32), and the second threaded rod (321) is provided with an external thread, and the second mounting hole (21) and the second threaded rod (321) are threadedly connected.

7. The tie rod assembly according to claim 1, characterized in that: The center lines of the cross tie rod (1), the ball tie rod (2) and the adjustment assembly (3) are collinear; the center of the ball tie rod (2) is located on the center line.

8. The tie rod assembly according to claim 2, characterized in that: Both sides of the mounting frame (34) extend upwards respectively, and the upper rack (361) and the lower rack (362) respectively abut against the side walls of the mounting frame (34).

9. The tie rod assembly according to claim 2, characterized in that: The device further comprises a cover (6); the cover (6) is fixedly arranged on the upper side of the mounting frame (34); a through movable groove (61) is provided on the cover (6); the movable groove (61) is located directly above the adjustment groove (35); the movable groove (61) and the adjustment groove (35) are located on the same straight line; the upper end of the adjustment rod (39) abuts against the side wall of the movable groove (61).

10. The tie rod assembly according to claim 9, characterized in that: A zero scale line is provided at the center of the cover (6), and a positive scale line is recorded to the right along the movable groove (61), and a negative scale line is recorded to the left along the movable groove (61).

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