A large-tonnage semi-trailer towing seat
By designing a locking ring, adjustment, and cross bolt mechanism on the semi-trailer traction seat, the problems of easy deformation and difficult maintenance of heavy semi-trailer traction seats are solved, achieving stable connection and convenient maintenance of the traction seat.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LUOYANG KAILAN MASCH MFG CO LTD
- Filing Date
- 2025-09-26
- Publication Date
- 2026-07-21
AI Technical Summary
Existing heavy-duty semi-trailer tractor seats are prone to deformation under prolonged high-intensity traction, have an unstable structure, are difficult to repair, and require complete replacement, affecting their stability and safety.
A large-tonnage semi-trailer towing seat was designed, equipped with a locking ring mechanism, an adjustment mechanism, and a cross bolt mechanism. The locking ring mechanism is fixed and locked by the adjustment mechanism, the cross bolt mechanism further ensures the firmness of the connection, and the rotating seat mechanism allows four-way swing to enhance stability.
It improves the connection tightness and stability of the traction seat, reduces shaking, enhances the safety and ease of maintenance, facilitates the replacement of worn parts, and ensures continuous and stable operation.
Smart Images
Figure CN224528812U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of semi-trailer towing seats, specifically relating to a large-tonnage semi-trailer towing seat. Background Technology
[0002] Semi-trailers, as a type of cargo tractor with large load capacity and strong load-bearing capacity, have been used more and more widely. The towing seat, as an important component of semi-trailers, is installed on the tractor and its function is to connect, pull, and separate the tractor and the semi-trailer. The load-bearing capacity of the towing seat is an important indicator of its performance.
[0003] Currently, most heavy-duty semi-trailer towing saddles on the market are made of castings, which have the following problems: the overall structure is fixed, and long-term exposure to high-intensity traction forces may cause structural deformation, affecting strength and durability, and making it difficult to ensure the stability of the towing parts; maintenance is difficult, and after damage, the entire saddle usually needs to be replaced, which makes it difficult to ensure the long-term use of the towing saddle. Utility Model Content
[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a large-tonnage semi-trailer towing seat. This large-tonnage semi-trailer towing seat is easy to maintain and replace worn parts, ensuring continuous and stable operation. It is equipped with a simple and sturdy locking ring mechanism and an adjustment mechanism. After the locking ring mechanism locks the towing pin, the adjustment mechanism can fix and lock the locking ring mechanism, thereby effectively preventing the towing seat from being unlocked due to vibration or impact. The cross bolt mechanism can further ensure the firmness of the connection parts, making it more convenient to use when towing large-tonnage semi-trailer trailers.
[0005] A large-tonnage semi-trailer towing seat includes a saddle plate and a fixed base. The saddle plate has a locking ring mechanism in the middle that can be connected to the semi-trailer towing pin. The back of the saddle plate has an adjustment mechanism that can lock and limit the locking ring mechanism. The saddle plate also has a horizontal bolt mechanism that further locks and limits the position. The bottom of the saddle plate is rotatably connected to a swingable rotating seat mechanism, and the bottom end of the rotating seat mechanism is rotatably connected to a lower support pin. The lower support pin is rotatably connected to a fixed base that can swing relative to the rotating seat mechanism.
[0006] The locking ring mechanism includes two locking rings and torsion springs arranged symmetrically. The two locking rings are rotatably connected inside the saddle plate and are symmetrically arranged with the vertical center line of the saddle plate as the axis of symmetry. The rotating parts on the lower surface of the two locking rings are engaged with torsion springs that can keep the two locking rings in an open state. The side of the two locking rings near the adjustment mechanism is provided with a groove that can cooperate with it.
[0007] Preferably, the adjustment mechanism includes a handle operating lever, a locking block, and a limiting locking rod. The locking block is connected to the middle of the handle operating lever and passes through the middle of the back of the saddle plate. One end of the handle operating lever is hinged to the back of the saddle plate. One end of the locking block, which passes through the inside of the saddle plate, is inserted into a groove between two locking rings. The limiting locking rod is hinged to the back of the saddle plate and can lock the handle operating lever.
[0008] Preferably, the cross bolt mechanism includes a safety cross bolt and a threaded tie rod. The threaded tie rod is threadedly connected to the end of the safety cross bolt and passes through the side of the saddle plate. The safety cross bolt is horizontally inserted inside the saddle plate on the side near the front.
[0009] Preferably, the saddle plate has an opening in the center of the front side for the towing pin of the semi-trailer to pass through, and both sides of the opening are provided with downwardly sloping guide plates.
[0010] Preferably, the rotating seat mechanism includes an upper support pin and a rotating seat plate, and both sides of the upper surface of the rotating seat plate are rotatably connected to the bottom of the saddle plate through the upper support pin.
[0011] Preferably, the top end of the fixed base is rotatably connected to the bottom end of the rotating base plate via a lower support pin.
[0012] Preferably, the rotation direction of the rotating base plate is perpendicular to the rotation direction of the fixed base.
[0013] The beneficial effects of the above technical solution are as follows:
[0014] This large-tonnage semi-trailer towing seat is designed with a locking ring mechanism, an adjustment mechanism, and a cross bolt mechanism to precisely match the specifications of the towing pin, ensuring a tight connection, reducing shaking and loosening during driving, and improving stability and safety. The various structures are assembled together, facilitating maintenance and replacement of worn parts, and ensuring continuous and stable operation. Equipped with a simple and robust locking ring mechanism and an adjustment mechanism, the locking ring mechanism locks the towing pin, and the adjustment mechanism can fix the locking ring mechanism in place, thus effectively preventing the towing seat from being unlocked due to vibration or impact. The cross bolt mechanism further ensures the firmness of the connection, making it easier to use when towing large-tonnage semi-trailer trailers. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the locking ring mechanism of this utility model;
[0017] Figure 3 This is a schematic diagram of the rotating seat mechanism of this utility model;
[0018] Figure 4 This is a schematic diagram of the fixed base of this utility model;
[0019] Figure 5 This is a schematic diagram of the internal structure of the saddle plate of this utility model;
[0020] Figure 6 This is a schematic diagram of the locking ring and torsion spring of this utility model.
[0021] In the diagram: 1. Saddle plate; 2. Fixed base; 3. Locking ring mechanism; 301. Locking ring; 302. Torsion spring; 4. Adjustment mechanism; 401. Handle operating lever; 402. Locking block; 403. Limiting lever; 5. Horizontal bolt mechanism; 501. Safety horizontal bolt; 502. Threaded tie rod; 6. Rotating seat mechanism; 601. Upper support pin; 602. Rotating seat plate; 7. Lower support pin. Detailed Implementation
[0022] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 6 The embodiments are described in detail below.
[0023] This embodiment provides a large-tonnage semi-trailer towing seat, as shown in the attached document. Figure 1 As shown, the device includes a saddle plate 1 and a fixed base 2. A locking ring mechanism 3, which connects to the towing pin of a semi-trailer, is located in the center of the saddle plate 1. After the semi-trailer towing pin moves to the opening in the saddle plate 1, it can be locked into the locking ring mechanism 3. An adjusting mechanism 4 is located on the back of the saddle plate 1 to lock and limit the locking ring mechanism 3. The adjusting mechanism 4 locks and limits the locking ring mechanism 3, ensuring it locks the semi-trailer towing pin and preventing it from coming loose under strong impact, thus guaranteeing its secure locking. The saddle plate 1 also has additional mechanisms inside that further limit the locking action. The horizontal bolt mechanism 5 acts as a locking and limiting mechanism for the towing pin, providing a more robust support for the towing seat. The bottom of the saddle plate 1 is rotatably connected to a swingable rotating seat mechanism 6, and the bottom end of the rotating seat mechanism 6 is rotatably connected to a lower support pin 7. The lower support pin 7 is rotatably connected to a fixed base 2 that can swing relative to the rotating seat mechanism 6. Both the rotating seat mechanism 6 and the fixed base 2 can swing, allowing the towing seat to swing in four directions (front, back, left, and right), ensuring stable transmission, strong load-bearing capacity, and a secure connection and safe attachment between the towing saddle and the semi-trailer.
[0024] Among them, such as Figure 6As shown, the locking ring mechanism 3 includes two symmetrically arranged locking rings 301 and torsion springs 302. Both locking rings 301 are rotatably connected inside the saddle plate 1 and are symmetrically arranged with the vertical center line of the saddle plate 1 as the axis of symmetry. The rotating parts on the lower surface of the two locking rings 301 are engaged with torsion springs 302 to keep the two locking rings 301 in an open state. The torsion springs 302 can apply torque to the two locking rings 301, so that the torsion springs 302 on both sides are in an open state. The side of the two locking rings 301 near the adjustment mechanism 4 is provided with a groove that can cooperate with it, so as to engage with the adjustment mechanism 4 and thus ensure that the locking ring mechanism 3 is locked and will not loosen.
[0025] In one alternative implementation, such as Figure 5 As shown, the adjustment mechanism 4 includes a handle operating rod 401, a locking block 402, and a limiting locking rod 403. The locking block 402 is connected to the middle of the handle operating rod 401 and passes through the middle of the back of the saddle plate 1. The part where the locking block 402 connects to the handle operating rod 401 is an oblong hole. The locking block 402 is connected to the handle operating rod 401 by a locking pin. The locking block 402 is movable relative to the handle operating rod 401, and the part of the locking block 402 that passes through the saddle plate 1 has a certain gap with the two side walls of the through slot, which can ensure that when the handle operating rod 401 rotates, the locking block 402 can move within the saddle plate 1, so that the locking block 402 can be inserted into or disengaged from the locking groove between the locking rings 301. One end of the handle operating rod 401 is hinged to the back of the saddle plate 1, and the end of the locking block 402 that passes through the saddle plate 1 is inserted into two locking rings. Within the slot between the locking rings 301, the limiting rod 403 is hinged to the back of the saddle plate 1 and can lock the handle operating rod 401. A buckle is fixedly connected to the lower surface of the limiting rod 403. When it is necessary to pull the block 402 outward to separate it from the locking ring 301, the limiting rod 403 can be rotated upward to separate the buckle from the handle operating rod 401. Rotating the handle operating rod 401 outward will pull the block 402 outward and separate it from the locking ring 301. When the block 402 is locked in the slot between the two locking rings 301, the limiting rod 403 can be pressed onto the handle operating rod 401, so that the buckle on the limiting rod 403 is locked on the outside of the handle operating rod 401. This can lock and limit the handle operating rod 401 and the block 402, preventing the block 402 from coming out and affecting the locking effect of the locking ring 301.
[0026] In one alternative implementation, such as Figure 5As shown, the horizontal bolt mechanism 5 includes a safety horizontal bolt 501 and a threaded tie rod 502. The threaded tie rod 502 is threadedly connected to the end of the safety horizontal bolt 501 and passes through the side of the saddle plate 1. By rotating the threaded tie rod 502, the overall length between the threaded tie rod 502 and the safety horizontal bolt 501 can be adjusted, thereby adjusting the horizontal position of the safety horizontal bolt 501. This allows the safety horizontal bolt 501 to be adjusted to the position corresponding to the opening of the saddle plate 1 as needed. The safety horizontal bolt 501 is horizontally inserted inside the saddle plate 1 on the side close to the front, which can further protect and lock the traction pin connected inside the saddle plate 1, preventing the traction pin from accidentally coming off.
[0027] In one alternative embodiment, the center of the front of the saddle plate 1 is provided with an opening for the towing pin of the semi-trailer to pass through. Both sides of the opening are provided with downwardly sloping guide plates, and the towing pin of the semi-trailer can be inserted into the two locking rings 301 from the opening along the guide plates.
[0028] In one alternative implementation, such as Figure 3 and 4 As shown, the rotating seat mechanism 6 includes an upper support pin 601 and a rotating seat plate 602. Both sides of the upper surface of the rotating seat plate 602 are rotatably connected to the bottom of the saddle plate 1 through the upper support pin 601. The top of the fixed base 2 is rotatably connected to the bottom of the rotating seat plate 602 through the lower support pin 7. The rotation direction of the rotating seat plate 602 is perpendicular to the rotation direction of the fixed base 2. The rotating seat plate 602 can swing relative to the saddle plate 1 through the upper support pin 601, and the fixed base 2 can swing relative to the rotating seat plate 602 through the lower support pin 7. This allows the towing seat to swing in four directions (front, back, left, and right) with the towing pin of the semi-trailer, ensuring stable transmission, strong load-bearing capacity, and a secure connection and safe attachment between the towing saddle and the semi-trailer.
[0029] In summary, the operating steps for this large-tonnage semi-trailer towing seat are as follows:
[0030] 1. Slowly bring the traction pin close to the opening on the front of the saddle plate 1. Use the guide plates on both sides of the opening that are slightly inclined downward to guide the traction pin into the saddle plate. The traction pin pushes the two locking rings 301 to overcome the elastic force of the torsion spring 302 and close inward until the traction pin is completely inside the locking ring 301.
[0031] 2. Then rotate the handle operating lever 401 towards the side closer to the saddle plate 1, so that the locking block 402 is inserted into the slots on the sides of the two locking rings 301, restricting the opening of the locking rings 301; and rotate the limit lever 403 downward so that the buckle at its end locks the handle operating lever 401 to prevent the locking block 402 from accidentally coming out; then push the safety cross bolt 501 horizontally into the saddle plate 1 so that it spans across the front of the traction pin to prevent the traction pin from accidentally coming out;
[0032] 3. When it is necessary to separate the traction pin, first move the safety bolt 501 to one side through the threaded pull rod 502, lift the limit lever 403, turn the handle operating rod 401, and drive the locking block 402 to completely exit the locking ring 301. The locking rings 301 on both sides will automatically open under the elastic force of the torsion spring 302, so that the traction pin can be separated from the saddle plate 1.
[0033] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.
Claims
1. A large-tonnage semi-trailer towing seat, comprising a saddle plate (1) and a fixed base (2), characterized in that: The saddle plate (1) has a locking ring mechanism (3) that can be connected to the semi-trailer towing pin in the middle. The back of the saddle plate (1) has an adjustment mechanism (4) that can lock and limit the locking ring mechanism (3). The saddle plate (1) also has a horizontal bolt mechanism (5) that further locks and limits the position. The bottom of the saddle plate (1) is rotatably connected to a swingable rotating seat mechanism (6), and the bottom end of the rotating seat mechanism (6) is rotatably connected to a lower support pin (7). The outside of the lower support pin (7) is rotatably connected to a fixed base (2) that can swing relative to the rotating seat mechanism (6). The locking ring mechanism (3) includes two locking rings (301) and torsion springs (302) arranged symmetrically. The two locking rings (301) are rotatably connected inside the saddle plate (1) and are symmetrically arranged with the vertical center line of the saddle plate (1) as the axis of symmetry. The rotating parts of the lower surface of the two locking rings (301) are engaged with torsion springs (302) that can keep the two locking rings (301) in an open state. The side of the two locking rings (301) near the adjustment mechanism (4) is provided with a groove that can cooperate with it.
2. The large-tonnage semi-trailer towing seat according to claim 1, characterized in that: The adjustment mechanism (4) includes a handle operating rod (401), a locking block (402), and a limiting locking rod (403). The locking block (402) is connected to the middle of the handle operating rod (401) and passes through the middle of the back of the saddle plate (1). One end of the handle operating rod (401) is hinged to the back of the saddle plate (1). One end of the locking block (402) that passes through the inside of the saddle plate (1) is inserted into the slot between two locking rings (301). The limiting locking rod (403) is hinged to the back of the saddle plate (1) and can lock the handle operating rod (401).
3. The towing seat for a large-tonnage semi-trailer according to claim 1, characterized in that: The horizontal bolt mechanism (5) includes a safety horizontal bolt (501) and a threaded tie rod (502). The threaded tie rod (502) is threadedly connected to the end of the safety horizontal bolt (501) and passes through the side of the saddle plate (1). The safety horizontal bolt (501) passes horizontally inside the saddle plate (1) on the side close to the front.
4. The large-tonnage semi-trailer towing seat according to claim 1, characterized in that: The saddle plate (1) has an opening in the middle of its front side for the towing pin of the semi-trailer to pass through, and both sides of the opening are provided with downwardly sloping guide plates.
5. A large-tonnage semi-trailer towing seat according to claim 1, characterized in that: The rotating seat mechanism (6) includes an upper support pin (601) and a rotating seat plate (602). Both sides of the upper surface of the rotating seat plate (602) are rotatably connected to the bottom of the saddle plate (1) through the upper support pin (601).
6. A large-tonnage semi-trailer towing seat according to claim 5, characterized in that: The top of the fixed base (2) is rotatably connected to the bottom of the rotating base plate (602) by a lower support pin (7).
7. A large-tonnage semi-trailer towing seat according to claim 6, characterized in that: The rotation direction of the rotating base plate (602) is perpendicular to the rotation direction of the fixed base (2).