Intelligent traction connecting rod mechanism

Abstract

The utility model discloses an intelligent traction connecting rod mechanism which comprises a connecting column, a connecting bearing is connected to the top end of the connecting column, a connecting flange is connected to the connecting bearing, a first connecting rod is fixed to the connecting flange, and the other end of the first connecting rod is hinged to a second connecting rod. The two ends of the second connecting rod are connected with the first connecting rod and the third connecting rod through bolt connecting pieces respectively, a bearing seat is arranged at the end of the third connecting rod, a pull rod is connected into the bearing seat, a shaft sleeve is arranged at the bottom of the pull rod, a traction shaft is connected into the shaft sleeve, and the traction shaft is fixed to the shaft sleeve through a positioning bolt. The traction device is scientific and reasonable in structural design, and the traction shaft can be driven to move through the connecting column by arranging a linkage mechanism composed of the first connecting rod, the second connecting rod, the third connecting rod and the like, so that the traction shaft can move stably, the consistency of equipment is improved, and resistance is reduced.

Description

Technical Field

[0001] This utility model relates to the field of traction linkage equipment technology, specifically an intelligent traction linkage mechanism. Background Technology

[0002] As a fixed coupling device between railway vehicle bodies, the core function of the traction rod is to transmit longitudinal traction and compressive loads in operational scenarios where frequent decoupling and recoupling are not required. Traditional traction rods mostly adopt a single-axis input structure (such as the duckbill-shaped telescopic connecting rod disclosed in Chinese Utility Model Patent CN202022073802.9), using a hinge plate and a rotating groove to buffer horizontal swing. However, existing technologies have the following significant drawbacks: existing mechanisms generally rely on a single input shaft for drive, resulting in ineffective absorption of vertical (Z-axis) swing; the shared input shaft structure leads to motion coupling in the linkage system, uneven stress on various nodes; and the traction shaft and transmission components are mostly welded or integrally cast, requiring replacement of the entire assembly during maintenance. To address these issues, we propose an intelligent traction linkage mechanism. Utility Model Content

[0003] The purpose of this invention is to provide an intelligent traction linkage mechanism to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an intelligent traction linkage mechanism, comprising a connecting column, a connecting bearing connected to the top of the connecting column, a connecting flange connected to the connecting bearing, a first connecting rod fixed to the connecting flange, the other end of the first connecting rod being hinged to a second connecting rod, the two ends of the second connecting rod being connected to the first connecting rod and a third connecting rod respectively by bolts, a bearing seat provided at the end of the third connecting rod, a pull rod connected inside the bearing seat, a bushing provided at the bottom of the pull rod, a traction shaft connected inside the bushing, and the traction shaft being fixed to the bushing by positioning bolts.

[0005] In the above scheme, the connecting column is rotatably mounted on the positioning seat, and one end of the connecting column is connected to a driving mechanism.

[0006] In the above scheme, the bushing and the traction shaft are respectively provided with positioning holes that cooperate with the positioning bolts.

[0007] In the above scheme, the tie rod is interference-fitted with the inner wall of the bearing housing.

[0008] In the above scheme, the tie rod, bearing seat and bushing are integrally fixed together.

[0009] In the above scheme, the tie rod and the connecting column are parallel to each other.

[0010] In the above scheme, threaded connection holes are provided at both ends of the second connecting rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This intelligent traction linkage mechanism has a simple and reasonable structural design and strong practicality. By setting up a linkage mechanism composed of a first link, a second link, a third link, etc., the traction shaft can be moved through the connecting column, thereby enabling the traction shaft to move stably, improving the consistency of the equipment, and reducing resistance. By setting up bearing seats, tie rods, bushings, positioning bolts, etc., the traction shaft can be easily fixed or disassembled, achieving the effect of easy maintenance and reducing the cost of use. This multi-stage linkage transmission system can accurately convert rotational motion into linear traction force, and at the same time, through the distribution of degrees of freedom of each hinge point, it can effectively absorb vibration and impact in the horizontal and vertical directions. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the traction shaft connection structure of this utility model.

[0014] In the diagram: 1. Connecting column; 11. Positioning seat; 12. Connecting bearing; 13. Connecting flange; 14. First connecting rod; 15. Bolted connector; 16. Second connecting rod; 17. Third connecting rod; 18. Bearing seat; 19. Tie rod; 2. Bushing; 21. Traction shaft; 22. Positioning bolt. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-2 This utility model provides a technical solution: an intelligent traction linkage mechanism, including a connecting column 1, a connecting bearing 12 connected to the top of the connecting column 1, a connecting flange 13 connected to the connecting bearing 12, a first connecting rod 14 fixed to the connecting flange 13, the other end of the first connecting rod 14 being hinged to a second connecting rod 16, the two ends of the second connecting rod 16 being connected to the first connecting rod 14 and a third connecting rod 17 respectively by bolt connectors 15, a bearing seat 18 being provided at the end of the third connecting rod 17, a pull rod 19 being connected inside the bearing seat 18, a bushing 2 being provided at the bottom of the pull rod 19, a traction shaft 21 being connected inside the bushing 2, and the traction shaft 21 being fixed to the bushing 2 by positioning bolts 22.

[0017] In the above scheme, the connecting column 1 is rotatably mounted on the positioning seat 11, and one end of the connecting column 1 is connected to a drive mechanism. The positioning seat 11 adopts a flange-type base design, and a double-row tapered roller bearing (model 32020X) is installed inside. The connecting column 1 is axially limited by the shaft shoulder and the snap ring. The drive end of the connecting column 1 is splined with the output shaft of the drive mechanism to transmit torque.

[0018] The drive mechanism can be a servo motor (such as Yaskawa SGM7G-20A, rated torque 20 N·m) or a hydraulic motor (displacement 10 mL / r), which is directly connected to the connecting column 1 through a coupling and supports forward and reverse rotation control.

[0019] In the above solution, the bushing 2 and the traction shaft 21 are respectively provided with positioning holes on their sides to cooperate with the positioning bolts 22. During disassembly, the traction shaft 21 can be pulled out simply by loosening the positioning bolts, and the replacement time is short.

[0020] In the above scheme, the tie rod 19 is interference-fitted with the inner wall of the bearing housing 18. The interference fit can withstand greater axial tensile force, avoid stress concentration caused by traditional key connections, and improve fatigue life.

[0021] In the above solution, the tie rod 19, bearing seat 18, and bushing 2 are integrally fixed together. The integrated structure eliminates the assembly errors of traditional welding or bolted connections, and improves the overall rigidity.

[0022] In the above scheme, the tie rod 19 and the connecting column 1 are parallel to each other. The parallel layout eliminates the lateral component of the traction force transmission path, reduces the bending moment borne by the traction shaft 21, and extends the bearing life.

[0023] In the above design, threaded connection holes are provided at both ends of the second connecting rod 16. By replacing the second connecting rod with different lengths, the stroke range of the traction shaft 21 can be adjusted by ±15%, adapting to various working conditions.

[0024] Working principle:

[0025] This intelligent traction linkage mechanism uses a connecting column 1 as the core drive unit, with its bottom end rotatably supported by a rolling bearing within a positioning seat 11. The positioning seat 11 is bolted to the equipment base (such as a rail vehicle chassis), and the bottom end of the connecting column 1 extends to the outside of the positioning seat 11, connecting to a drive mechanism such as a servo motor or hydraulic motor via a coupling. When the drive mechanism is activated, the connecting column 1 rotates around its own axis, causing the top connecting bearing 12 to rotate synchronously.

[0026] The connecting bearing 12 is a double-row angular contact bearing, and its outer ring is fixed to the connecting flange 13 by flange bolts. The connecting flange 13 is disc-shaped, and a first connecting rod 14 is welded to its edge. The first connecting rod 14 is a rigid rod made of high-strength alloy steel, and its end is hinged to the second connecting rod 16 by a pin. The second connecting rod 16 has symmetrical threaded connection holes at both ends, and is detachably connected to the first connecting rod 14 and the third connecting rod 17 by bolt connectors 15, respectively. The bolt connectors 15 include hexagonal bolts with anti-loosening washers and self-locking nuts to ensure the stability of the hinge point under high-frequency vibration.

[0027] The bearing housing 18 is welded to the end of the third connecting rod 17, and the inner hole of the bearing housing 18 is interference-fitted with the tie rod 19. The tie rod 19 has a stepped shaft structure, and its lower end is integrally formed with the bushing 2 through a heat fitting process. The inner hole of the bushing 2 is machined with a keyway, which forms a circumferential positioning with the flat key on the outer wall of the traction shaft 21. After the traction shaft 21 is inserted into the bushing 2, the operator aligns the positioning hole on the side of the traction shaft 21 with the positioning hole of the bushing 2, screws in the positioning bolt 22, and applies torque to lock it in place, thereby achieving axial fixation. This split design allows the traction shaft 21 to be replaced separately after wear, reducing maintenance costs.

[0028] It is worth noting that the axis of the pull rod 19 remains parallel to the axis of the connecting column 1. This arrangement ensures that when the drive mechanism rotates the connecting column 1, the oscillation of the first link 14 is converted into the vertical motion of the third link 17 via the second link 16, thereby driving the pull rod 19 and the traction shaft 21 to linearly displace in the vertical direction. This multi-stage linkage transmission system can accurately convert rotational motion into linear traction force, and at the same time, through the distribution of degrees of freedom at each hinge point, it effectively absorbs horizontal and vertical vibrations and shocks.

[0029] In actual operation, the operator can fine-tune the hinge gap between the second link 16 and the first and third links by adjusting the tightening torque of the bolt connector 15, thereby controlling the overall rigidity of the mechanism. When it is necessary to adapt to different load conditions, the second link 16 of different lengths can be replaced (such as ±50mm adjustment range), and the link system can be quickly reassembled through the threaded connection hole, significantly improving the adaptability of the mechanism.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intelligent traction linkage mechanism, comprising a connecting column (1), characterized in that: The top of the connecting column (1) is connected to a connecting bearing (12), and a connecting flange (13) is connected to the connecting bearing (12). A first connecting rod (14) is fixed on the connecting flange (13). The other end of the first connecting rod (14) is hinged to a second connecting rod (16). The two ends of the second connecting rod (16) are respectively connected to the first connecting rod (14) and the third connecting rod (17) through bolt connectors (15). The end of the third connecting rod (17) is provided with a bearing seat (18). A pull rod (19) is connected inside the bearing seat (18). A bushing (2) is provided at the bottom of the pull rod (19). A traction shaft (21) is connected inside the bushing (2), and the traction shaft (21) is fixed to the bushing (2) by a positioning bolt (22).

2. The intelligent traction linkage mechanism according to claim 1, characterized in that: The connecting column (1) is rotatably mounted on the positioning seat (11), and one end of the connecting column (1) is connected to a driving mechanism.

3. The intelligent traction linkage mechanism according to claim 1, characterized in that: The bushing (2) and the traction shaft (21) have corresponding positioning holes on their sides that cooperate with the positioning bolts (22).

4. The intelligent traction linkage mechanism according to claim 1, characterized in that: The tie rod (19) is interference-fitted with the inner wall of the bearing housing (18).

5. The intelligent traction linkage mechanism according to claim 1, characterized in that: The tie rod (19), bearing seat (18) and bushing (2) are integrally fixed together.

6. The intelligent traction linkage mechanism according to claim 1, characterized in that: The tie rod (19) is parallel to the connecting column (1).

7. The intelligent traction linkage mechanism according to claim 1, characterized in that: The two ends of the second connecting rod (16) are respectively provided with threaded connection holes.

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