Pull rod type four-tandem hydraulic combined trailer bogie

Abstract

The utility model discloses a pull rod type four-tandem hydraulic combined trailer bogie, and belongs to the technical field of trailer bogies. Comprising a traction beam, an upper steering support and a lower steering support, the upper steering support and the lower steering support are hinged to the traction beam, a transverse lock pin structure is arranged on the lower steering support, and the transverse lock pin structure is used for transversely connecting and locking the upper steering support and the lower steering support. A vertical positioning pin is vertically inserted and fixed on the upper steering support and the lower steering support; the vertical positioning pin is used for vertically connecting and locking the upper steering support and the lower steering support; the upper steering support and the lower steering support are connected and locked in the transverse direction and the vertical direction through the transverse lock pin structure and the vertical positioning pin respectively, and connection is more stable.

Description

Technical Field

[0001] This utility model belongs to the technical field of trailer bogies, specifically a tie-rod type four-column hydraulic combined trailer bogie. Background Technology

[0002] Hydraulic trailers are specialized vehicles for transporting large, non-detachable goods such as large transformers. They are typically used in conjunction with a trailer tractor. The tractor pulls the hydraulic trailer via a drawbar, and the tractor's traction is transmitted to the hydraulic trailer through the drawbar. When traveling on a straight road, the hydraulic trailer, drawbar, and trailer are in a straight line, requiring no additional operation besides driving the tractor. When turning or driving on a curve, steering of the hydraulic trailer requires activating the hydraulic power unit and operating the steering cylinders.

[0003] Therefore, the applicant has applied for a steering locking device for a hydraulic full trailer (patent number: ZL202321601534.0). This device is detachably connected to the upper steering support by setting a fixed cone shaft passing through the seat body. When passing through a curve, the turning angle of the tractor is transmitted to the lower steering support through the drawbar. The lower steering support drives the upper steering support to turn synchronously through the fixed cone shaft. The upper steering support then drives the steering cylinder of the hydraulic trailer to rotate through the steering tie rod, thereby realizing that the hydraulic full trailer follows the steering of the tractor.

[0004] However, during use, the upper steering support and the lower steering support are only locked together by a fixed conical shaft. The fixed conical shaft is threaded into the seat of the lower steering support. The looseness of the threads between the fixed conical shaft and the seat, as well as the tolerance of the thread fit, causes gaps between the fixed conical shaft and the upper and lower steering supports. The gap between the fixed conical shaft and the upper and lower steering supports causes the upper steering support to not immediately turn synchronously when the traction rod drives the lower steering support to rotate, resulting in insufficient responsiveness. Utility Model Content

[0005] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a tie-rod type four-column hydraulic combined trailer bogie. This application provides the following technical solution:

[0006] The device includes a traction beam and an upper steering support and a lower steering support hinged to the traction beam. The lower steering support is provided with a lateral locking pin structure, which is used to laterally connect and lock the upper steering support and the lower steering support. The upper steering support and the lower steering support are vertically engaged and fixed with a vertical positioning pin, which is used to vertically connect and lock the upper steering support and the lower steering support.

[0007] The transverse locking pin structure includes a tapered pin sleeve fixed to the lower steering support, a tapered pin slidably disposed inside the tapered pin sleeve, and a bolt post disposed inside the tapered pin sleeve. One end of the bolt post mates with the shaft hole of the tapered pin sleeve, and the other end mates with the threaded taper of the tapered pin.

[0008] The tapered pin sleeve is provided with a limiting screw, and the tapered pin is provided with a limiting groove. The bottom end of the limiting screw extends into the limiting groove to limit the rotation of the tapered pin.

[0009] One end of the bolt column that mates with the tapered pin sleeve shaft hole extends out of the tapered pin sleeve, and a knob nut is threaded onto that end.

[0010] A stop plate is provided on the lower steering support. The upper end of the stop plate has a through hole that matches the outer contour of the knob nut, and the lower end is fitted onto a pin fixed on the lower steering support.

[0011] The upper steering support has a column through hole, and the lower steering support has a tapered through hole. The vertical positioning pin includes a columnar part that fits into the column through hole and a tapered part that fits into the tapered through hole. The columnar part passes through the column through hole, and the tapered part passes through the tapered through hole.

[0012] The bottom of the vertical positioning pin is provided with a threaded part, and the threaded part passes through the tapered through hole and is threadedly connected to a lock nut.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0014] By setting a lateral locking pin structure and a vertical positioning pin to lock the upper and lower steering supports laterally and vertically, the connection is more stable. Furthermore, the upper and lower steering supports have two connections in different directions. When the lower steering support drives the upper steering support, even if one connection becomes loose and causes a gap to increase, the other connection with a smaller gap can still ensure synchronization.

[0015] Meanwhile, the tapered pin of the transverse locking pin structure does not directly engage with the tapered pin sleeve thread, but rather engages with the bolt post thread, and then the bolt post pushes the tapered pin to move within the tapered pin sleeve. The tapered pin and the tapered pin sleeve contact each other through a smooth cylindrical surface, making it easier to machine to a smaller gap during processing. The bottom of the vertical positioning pin is tapered and has a threaded part, which engages with the locking nut through the threaded part. Tightening the locking nut pulls the vertical positioning pin downward through the thread, so that the tapered part of the vertical positioning pin fits tightly with the tapered through hole. That is, the connection between the transverse locking pin structure and the vertical positioning pin and the upper and lower steering supports is tighter.

[0016] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the traction beam of a four-column hydraulic combined trailer bogie with a tie rod.

[0019] Figure 2 This is an enlarged view of the transverse pin lock structure in the cross-sectional view of the traction beam of a tie-rod type four-column hydraulic combined trailer bogie.

[0020] Figure 3 This is a top view of the traction beam of a four-column hydraulic combination trailer bogie with a tie rod.

[0021] Figure 4 This is a schematic diagram of a lever-type four-column hydraulic combination trailer.

[0022] Reference numerals: 1. Traction beam; 2. Upper steering support; 21. Column through hole; 3. Lower steering support; 31. Tapered through hole; 4. Lateral locking pin structure; 41. Tapered pin sleeve; 411. Limiting screw; 42. Tapered pin; 421. Limiting groove; 43. Bolt post; 44. Knob nut; 45. Stop plate; 46. Column pin; 5. Vertical positioning pin; 51. Columnar part; 52. Tapered part; 53. Threaded part; 54. Locking nut. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] Please refer to Figure 1-3 As shown, this utility model provides a tie-rod type four-column hydraulic combined trailer bogie, including a traction beam 1 and an upper steering support 2 and a lower steering support 3 hinged to the traction beam 1. The lower steering support 3 is provided with a transverse locking pin structure 4, which is used to transversely connect and lock the upper steering support 2 and the lower steering support 3. The upper steering support 2 and the lower steering support 3 are vertically inserted and fixed with a vertical positioning pin 5; the vertical positioning pin 5 is used to vertically connect and lock the upper steering support 2 and the lower steering support 3.

[0027] The transverse locking pin structure 4 includes a tapered pin sleeve 41 fixed on the lower steering support 3, a tapered pin 42 slidably disposed inside the tapered pin sleeve 41, and a bolt post 43 disposed inside the tapered pin sleeve 41. One end of the bolt post 43 is engaged with the shaft hole of the tapered pin sleeve 41, and the other end is threadedly engaged with the tapered pin 42.

[0028] A limiting screw 411 is provided on the tapered pin sleeve 41, and a limiting groove 421 is provided on the tapered pin 42. The bottom end of the limiting screw 411 extends into the limiting groove 421 to limit the rotation of the tapered pin 42. Furthermore, the upper steering support 2 has a tapered hole corresponding to the tapered pin 42 on the side facing the lateral locking pin structure 4. The knob bolt post 43 pushes the tapered pin 42 to slide relative to the tapered pin sleeve 41 until it slides into the tapered hole and contacts the tapered hole tightly, thereby realizing the lateral connection locking between the lower steering support 3 and the upper steering support 2 by the tapered pin 42.

[0029] One end of the bolt post 43 that mates with the shaft hole of the tapered pin sleeve 41 extends out of the tapered pin sleeve 41, and a knob nut 44 is threadedly installed on this end; specifically, when the knob nut 44 is threadedly engaged with the bolt post 43, the tightening direction is consistent with the direction in which the bolt post 43 pushes the tapered pin 42 toward the tapered hole.

[0030] A stop plate 45 is provided on the lower steering support 3. The upper end of the stop plate 45 has a through hole that fits with the outer contour of the knob nut 44, and the lower end is fitted onto the pin 46 fixed on the lower steering support 3. The pin 46 also has a through hole, into which a retaining pin can be inserted to prevent the stop plate 45 from slipping off.

[0031] The upper steering support 2 has a column through hole 21, and the lower steering support 3 has a tapered through hole 31. The vertical positioning pin 5 includes a columnar part 51 that fits into the column through hole 21 and a tapered part 52 that fits into the tapered through hole 31. The columnar part 51 passes through the column through hole 21, and the tapered part 52 passes through the tapered through hole 31.

[0032] The bottom of the vertical positioning pin 5 is provided with a threaded part 53, and the threaded part 53 passes through the tapered through hole 31 and is threadedly connected to a locking nut 54.

[0033] In practice, the column through hole 21 of the upper steering support 2 is rotated to align with the tapered through hole 31 of the lower steering support 3. Then, the vertical positioning pin 5 is inserted into the column through hole 21 and the tapered through hole 31, and the locking nut 54 is threaded into the threaded part 53 of the vertical positioning pin 5 and tightened so that the tapered part 52 of the vertical positioning pin 5 is tightly against the inner wall of the tapered through hole 31. Then, the knob nut 44 is rotated, and the knob nut 44 drives the bolt column 43 to rotate. At this time, the tapered pin 42 slides along the thread between it and the bolt column 43 into the tapered hole of the upper steering support 2 until it is fully inserted into the tapered hole and fits into the tapered hole. Then, the through hole on the stop plate 45 that matches the knob nut 44 is fitted with the knob nut 44, and the other end is fitted onto the column pin 46 to lock the knob nut 44. At this time, the upper steering support 2 and the lower steering support 3 are connected and locked by the tapered pin 42 and the vertical positioning pin 5.

[0034] like Figure 4 As shown, this utility model also provides a tie rod type four-longitudinal combination trailer, including a main traction beam and two auxiliary traction beams. The upper steering support between the main traction beam and the auxiliary traction beams is connected by a hinged tie rod. When the upper steering support of the main traction beam rotates to one side, it drives the upper steering support of the auxiliary traction beam to achieve synchronous steering at multiple points.

[0035] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A tie-rod type four-column hydraulic combined trailer bogie, characterized in that: It includes a traction beam (1) and an upper steering support (2) and a lower steering support (3) hinged to the traction beam (1). The lower steering support (3) is provided with a transverse locking pin structure (4). The transverse locking pin structure (4) is used to transversely connect and lock the upper steering support (2) and the lower steering support (3). The upper steering support (2) and the lower steering support (3) are vertically inserted and fixed with a vertical positioning pin (5). The vertical positioning pin (5) is used to vertically connect and lock the upper steering support (2) and the lower steering support (3).

2. The tie-rod type four-column hydraulic combined trailer bogie as described in claim 1, characterized in that: The transverse locking pin structure (4) includes a tapered pin sleeve (41) fixed on the lower steering support (3), a tapered pin (42) is slidably disposed inside the tapered pin sleeve (41), and a bolt post (43) is disposed inside the tapered pin sleeve (41). One end of the bolt post (43) is engaged with the shaft hole of the tapered pin sleeve (41), and the other end is threadedly engaged with the tapered pin (42).

3. The tie-rod type four-column hydraulic combined trailer bogie as described in claim 2, characterized in that: The tapered pin sleeve (41) is provided with a limiting screw (411), and the tapered pin (42) is provided with a limiting groove (421). The bottom end of the limiting screw (411) extends into the limiting groove (421) to limit the rotation of the tapered pin (42).

4. A tie-rod type four-column hydraulic combined trailer bogie as described in claim 3, characterized in that: One end of the bolt post (43) that mates with the shaft hole of the tapered pin sleeve (41) extends out of the tapered pin sleeve (41), and a knob nut (44) is threaded onto this end.

5. A tie-rod type four-column hydraulic combined trailer bogie as described in claim 4, characterized in that: The lower steering support (3) is provided with a stop plate (45). The upper end of the stop plate (45) has a through hole that matches the outer contour of the knob nut (44), and the lower end is fitted onto the pin (46) fixed on the lower steering support (3).

6. A tie-rod type four-column hydraulic combined trailer bogie as described in claim 1, characterized in that: The upper steering support (2) has a column through hole (21), and the lower steering support (3) has a tapered through hole (31). The vertical positioning pin (5) includes a columnar part (51) that fits into the column through hole (21) and a tapered part (52) that fits into the tapered through hole (31). The columnar part (51) passes through the column through hole (21), and the tapered part (52) passes through the tapered through hole (31).

7. A tie-rod type four-column hydraulic combined trailer bogie as described in claim 6, characterized in that: The vertical positioning pin (5) has a threaded part (53) at its bottom, and the threaded part (53) is threaded through the tapered through hole (31) and connected to a locking nut (54).

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