Locking device of semitrailer traction seat

Abstract

The invention relates to the technical field of automobile parts, and discloses a semitrailer traction seat locking device which comprises a traction mechanism, the traction mechanism comprises a support, a fixing assembly arranged at the bottom of the support, a through hole formed in the center of the top of the support, and a protection plate fixedly installed at the top of the support. The positioning assembly is arranged at the bottom of the support; the locking mechanism comprises a fixing plate located on the outer side of the support, a rotating rod rotationally installed on the outer side of the fixing plate, and a spiral reset spring fixedly installed on the outer side of the rotating rod. Stable elastic force is provided through a spiral reset spring, the locking hook is kept locked and can be rapidly reset even if vibration occurs, a damping telescopic rod and a buffer spring in the adjusting assembly absorb and buffer vibration energy and prevent shaking unlocking, a reliable anti-vibration locking mechanism is constructed, the safety and reliability of the locking device in the vibration environment are improved, and the locking device is suitable for being used in the vibration environment. Therefore, the problem of locking failure caused by vehicle running vibration is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a locking device for a semi-trailer fifth wheel. Background Art

[0002] In recent years, semi-trailers, as important equipment for road transportation, have played a key role in the field of cargo transportation. The connection between the semi-trailer and the tractor relies on the fifth wheel, and the locking device of the fifth wheel is the core component to ensure a reliable connection between the two. With the continuous development of the transportation industry, the volume of cargo transportation is increasing and the transportation speed is gradually increasing, which puts higher requirements on the safety, reliability and ease of operation of the fifth wheel locking device. Therefore, the research and development and improvement of the locking device of the semi-trailer fifth wheel has become a key link in improving the transportation performance and safety of semi-trailers.

[0003] Various vibrations will be generated during the driving process of the vehicle. When responding to vibrations, some existing locking device structures may cause the locking mechanism to loosen unexpectedly or even unlock on its own. This is because their structural design does not fully consider the impact of vibrations and lacks an effective anti-vibration locking mechanism. For example, some simple snap-on locking structures may cause the snap to disengage under strong vibrations, thereby rendering the lock ineffective. Summary of the Invention

[0004] In view of the above problems existing in the locking device of the conventional semi-trailer fifth wheel, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a locking device for a semi-trailer fifth wheel.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: including a traction mechanism, including a support, a fixing component arranged at the bottom of the support, a through hole opened in the center of the top of the support, a protective plate fixedly installed on the top of the support, and a positioning component arranged at the bottom of the support; a locking mechanism, including a fixing plate located on the outside of the support, a rotating rod rotatably installed on the outside of the fixing plate, a spiral return spring fixedly installed on the outside of the rotating rod, a connecting plate fixedly installed on the end of the spiral return spring, and an adjustment component arranged on the outside of the connecting plate.

[0007] As a preferred solution of the locking device of the semi-trailer traction seat of the present invention, the traction mechanism also includes a fixed block fixedly installed at the bottom of the support, a mounting plate fixedly installed on the outside of the fixed block, a bent plate fixedly installed on the outside of the mounting plate, and a positioning rod fixedly installed on the outside of the bent plate.

[0008] As a preferred solution of the locking device of the semi-trailer fifth wheel of the present invention, the locking mechanism further includes a locking hook fixedly mounted on the outside of the adjustment assembly, and a gripping rod fixedly mounted on the top of the locking hook.

[0009] As a preferred solution of the locking device of the semi-trailer traction seat of the present invention, the adjustment assembly includes a protective telescopic sleeve fixedly mounted on the outside of the connecting plate, a damping telescopic rod fixedly mounted on the inner cavity of the protective telescopic sleeve, and a limiting hole piece fixedly mounted on the outside of the damping telescopic rod.

[0010] As a preferred solution of the locking device of the semi-trailer traction seat of the present invention, the adjustment assembly further includes a buffer spring movably sleeved on the outer surface of the damping telescopic rod, and a connecting block fixedly mounted on the end of the damping telescopic rod, and the limiting hole piece movably sleeved on the outer surface of the damping telescopic rod.

[0011] As a preferred solution of the locking device of the semi-trailer traction seat of the present invention, the fixing assembly includes a support seat located at the bottom of the support, a shaft sleeve fixedly installed on the top of the support seat, and a damping and vibration-reducing spring fixedly installed in the inner cavity of the support seat.

[0012] As a preferred solution of the locking device of the semi-trailer traction seat of the present invention, the fixing assembly further includes a groove provided at the bottom of the support seat, and a buffer isolation pad fixedly installed at the bottom of the damping spring.

[0013] As a preferred solution of the locking device of the semi-trailer traction seat of the present invention, the positioning assembly includes a lock movably installed at the bottom of the support, a locking surface located outside the lock, and a clamping arm rod rotatably installed at the top of the lock.

[0014] As a preferred solution of the locking device of the semi-trailer traction seat of the present invention, the positioning assembly further includes a clamping surface located on the outside of the clamping arm, and an axle seat fixedly installed on the outside of the clamping arm.

[0015] As a preferred solution of the locking device of the semi-trailer traction seat of the present invention, the bent portion of the locking hook is movably connected to the outer surface of the positioning rod to realize locking of the traction mechanism by the locking mechanism.

[0016] The beneficial effects of the present invention are as follows: the spiral return spring provides a stable elastic force to keep the locking hook locked, and it can quickly reset even if it vibrates. The damping telescopic rod and buffer spring in the adjustment component absorb and buffer vibration energy to prevent shaking and unlocking, thereby building a reliable anti-vibration locking mechanism, improving the safety and reliability of the locking device in a vibration environment, and effectively solving the problem of locking failure caused by vehicle driving vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a side view of the overall structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the locking structure of the present invention.

[0021] Figure 4 It is a cross-sectional view of the support seat structure of the present invention.

[0022] Figure 5 It is a schematic diagram of the structure of the regulating component of the present invention.

[0023] Figure 6 It is a schematic diagram of the positioning component structure of the present invention.

[0024] In the picture: 100. Traction mechanism; 101. Support; 102. Fixing assembly; 102a. Support seat; 102b. Bushing; 102c. Damping spring; 102d. Groove; 102e. Buffering and isolating pad; 103. Through hole; 104. Protective plate; 105. Positioning assembly; 105a. Locking catch; 105b. Locking surface; 105c. Clamping arm; 105d. Clamping surface; 105e. Shaft seat; 106. Fixing block; 107. Mounting plate; 108. L-shaped bent plate; 109. Positioning rod. 200, locking mechanism; 201, fixing plate; 202, rotating rod; 203, spiral return spring; 204, connecting plate; 205, adjustment assembly; 205a, protective telescopic sleeve; 205b, damping telescopic rod; 205c, limiting hole plate; 205d, buffer spring; 205e, connecting block; 206, locking hook; 207, grip rod. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0028] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0029] Example 1:

[0030] Reference Figure 1-5 , which is a first embodiment of the present invention, provides a locking device for a semi-trailer traction seat, which includes a traction mechanism 100, including a support 101, a fixing assembly 102 arranged at the bottom of the support 101, a through hole 103 opened in the center of the top of the support 101, a protective plate 104 fixedly installed on the top of the support 101, and a positioning assembly 105 arranged at the bottom of the support 101; a locking mechanism 200, including a fixing plate 201 located on the outside of the support 101, a rotating rod 202 rotatably installed on the outside of the fixing plate 201, a spiral return spring 203 fixedly installed on the outside of the rotating rod 202, a connecting plate 204 fixedly installed at the end of the spiral return spring 203, and an adjustment assembly 205 arranged on the outside of the connecting plate 204.

[0031] Among them, the support 101 serves as the basis of the entire traction mechanism 100 and provides a stable support structure for other components; the fixed plate 201, rotating rod 202, spiral return spring 203, connecting plate 204, adjustment assembly 205, locking hook 206 and grip rod 207 in the locking mechanism 200 work together to achieve reliable locking of the traction mechanism 100. The spiral return spring 203 can provide a stable elastic force to ensure that the locking hook 206 always maintains a locked state on the traction mechanism 100. When unlocking is required, the operator can easily operate through the grip rod 207, which is convenient and quick.

[0032] Specifically, the traction mechanism 100 also includes a fixed block 106 fixedly installed at the bottom of the support 101, a mounting plate 107 fixedly installed on the outside of the fixed block 106, an L-shaped bent plate 108 fixedly installed on the outside of the mounting plate 107, and a positioning rod 109 fixedly installed on the outside of the L-shaped bent plate 108; the bending part of the locking hook 206 is movably connected to the outer surface of the positioning rod 109, so as to realize the locking mechanism 200 to lock the traction mechanism 100.

[0033] Among them, the design of the fixing block 106, the mounting plate 107, the L-shaped bent plate 108 and the positioning rod 109 makes the installation of the traction mechanism 100 more convenient and quick; from the locking function point of view, the locking hook 206 builds a stable and flexible connection point between the locking mechanism 200 and the traction mechanism 100, so that the locking hook 206 can be rotated and locked with the positioning rod 109 as the fulcrum, ensuring the accuracy and reliability of the locking process, effectively preventing the semi-trailer from accidentally detaching from the tractor during driving, and ensuring driving safety; in terms of operational convenience, this movable socket method allows the operator to easily control the opening and closing of the locking hook 206 through the grip 207, achieving rapid locking and unlocking, and improving work efficiency.

[0034] Furthermore, the locking mechanism 200 further includes a locking hook 206 fixedly mounted on the outside of the adjustment assembly 205 , and a gripping rod 207 fixedly mounted on the top of the locking hook 206 .

[0035] The grip 207 is convenient for a person to hold and adjust the positioning position of the locking hook 206 .

[0036] Preferably, the adjustment component 205 includes a protective telescopic sleeve 205a fixedly mounted on the outside of the connecting plate 204, a damping telescopic rod 205b fixedly mounted in the inner cavity of the protective telescopic sleeve 205a, and a limiting hole piece 205c fixedly mounted on the outside of the damping telescopic rod 205b. The adjustment component 205 also includes a buffer spring 205d movably mounted on the outer surface of the damping telescopic rod 205b, and a connecting block 205e fixedly mounted on the end of the damping telescopic rod 205b. The limiting hole piece 205c is movably mounted on the outer surface of the damping telescopic rod 205b.

[0037] Among them, the protective telescopic sleeve 205a, damping telescopic rod 205b, limiting hole plate 205c, buffer spring 205d and connecting block 205e in the adjustment component 205 have the functions of adjustment and buffering. The protective telescopic sleeve 205a can protect the internal damping telescopic rod 205b and buffer spring 205d from the influence of external factors such as dust and moisture, thereby extending their service life. The damping telescopic rod 205b and buffer spring 205d can further buffer vibration and impact force during vehicle driving. At the same time, the length and tension of the locking mechanism 200 can be fine-tuned according to actual needs to adapt to different working conditions.

[0038] Furthermore, the fixing assembly 102 includes a support seat 102a located at the bottom of the support 101, a sleeve 102b fixedly installed on the top of the support seat 102a, and a damping vibration-damping spring 102c fixedly installed in the inner cavity of the support seat 102a. The fixing assembly 102 also includes a groove 102d opened at the bottom of the support seat 102a, and a buffer isolation pad 102e fixedly installed at the bottom of the damping vibration-damping spring 102c.

[0039] Among them, the support seat 102a, shaft sleeve 102b, damping vibration reduction spring 102c, groove 102d and buffer isolation plate 102e in the fixing assembly 102 cooperate with each other. On the one hand, the connection stability between the support 101 and the semi-trailer body is enhanced. On the other hand, the damping vibration reduction spring 102c and the buffer isolation plate 102e can effectively buffer the vibration and impact force generated during the vehicle's driving process, reduce damage to the fifth wheel and semi-trailer, and extend their service life. When the vehicle passes through bumpy roads, the damping vibration reduction spring 102c can absorb vibration energy to avoid excessive impact force being transmitted to the fifth wheel and semi-trailer.

[0040] During use, when the semi-trailer needs to be connected to the tractor, the traction pin of the semi-trailer is inserted through the through hole 103 at the top center of the support 101 in the traction mechanism 100, and the positioning assembly 105 positions and preliminarily fixes the traction pin;

[0041] The support base 102a, sleeve 102b, damping spring 102c, groove 102d and buffer isolation plate 102e in the fixing assembly 102 work together. The support base 102a provides support, the sleeve 102b assists in positioning, and the damping spring 102c and buffer isolation plate 102e buffer vibration and impact during vehicle driving.

[0042] When locking, the operator holds the grip 207 at the top of the locking hook 206 in the locking mechanism 200 and rotates the rotating rod 202. The spiral return spring 203 on the outside of the rotating rod 202 generates elastic force, which is transmitted to the adjustment component 205 through the connecting plate 204. The protective telescopic sleeve 205a in the adjustment component 205 protects the internal structure. The damping telescopic rod 205b, the limiting hole plate 205c, the buffer spring 205d and the connecting block 205e cooperate with each other to fine-tune the locking length and tension and buffer the impact force. The bending part of the locking hook 206 is movably connected to the positioning rod 109 on the outside of the L-shaped bent plate 108 in the traction mechanism 100, so that the locking mechanism 200 can reliably lock the traction mechanism 100, ensuring the stability and safety of the connection between the semi-trailer and the tractor; when separation is required, the grip 207 can be unlocked by reversing the operation.

[0043] In summary, the reliable locking of the traction mechanism 100 by the locking mechanism 200 effectively prevents the dangerous situation of the semi-trailer separating from the tractor during driving, greatly improving driving safety. Moreover, during operations such as turning and braking of the vehicle, the locking mechanism 200 can maintain a stable locking state, ensuring the coordinated movement of the semi-trailer and the tractor, and reducing the possibility of accidents.

[0044] Example 2:

[0045] Reference Figure 1 and Figure 6 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: a positioning component 105 is provided for fixing the connection structure located at the through hole 103.

[0046] Furthermore, the positioning assembly 105 includes a lock 105a movably mounted on the bottom of the support 101, a locking surface 105b located on the outside of the lock 105a, and a clamping arm 105c rotatably mounted on the top of the lock 105a. The positioning assembly 105 also includes a clamping surface 105d located on the outside of the clamping arm 105c, and an axle seat 105e fixedly mounted on the outside of the clamping arm 105c.

[0047] Among them, the lock 105a, locking surface 105b, clamping arm 105c, clamping surface 105d and axle seat 105e in the positioning component 105 can realize the precise positioning and firm clamping of the towing pin. The through hole 103 is opened in the top center of the support 101, which provides accurate position guidance for the insertion of the towing pin, ensuring the accurate connection between the semi-trailer and the tractor. At the same time, the clamping effect of the positioning component 105 can prevent the towing pin from shaking or shifting during driving, thereby improving driving safety.

[0048] During use, after the towing pin of the semi-trailer is inserted into the through hole 103, the positioning assembly 105 starts to work. First, the lock 105a movably installed at the bottom of the support 101 will automatically approach the towing pin, and its outer locking surface 105b fits with the surface of the towing pin to preliminarily position and lock the towing pin. Then, the operator can manually operate or use the relevant mechanism of the vehicle to drive the clamping arm 105c to rotate around the axle seat 105e, so that the clamping arm 105c moves closer to the towing pin. As the clamping arm 105c rotates, the outer clamping surface 105d gradually comes into close contact with the towing pin, further enhancing the clamping force on the towing pin, ensuring that the towing pin is firmly fixed in the through hole 103; when unlocking is required, the clamping arm 105c is operated in reverse to separate it from the towing pin, and then the lock 105a is removed to complete the unlocking process, which facilitates the separation of the semi-trailer and the tractor.

[0049] In summary, the lock buckle 105a can flexibly lock the traction pin inserted into the through hole 103, and the outer locking surface 105b increases the contact area with the traction pin, providing a more stable locking force, effectively preventing the traction pin from shaking or falling out during the driving of the vehicle, and ensuring driving safety; the clamping arm 105c can adjust the angle according to the actual situation of the traction pin, and the outer clamping surface 105d further enhances the clamping effect on the traction pin to ensure the tightness of the connection. The axle seat 105e provides a stable support and rotation fulcrum for the clamping arm 105c, making the structure of the entire positioning assembly 105 more stable, and improving the reliability and durability of the device.

[0050] It is important to note that the construction and arrangement of the present application, as illustrated in various exemplary embodiments, are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure will readily appreciate that numerous modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various components, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, components shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. All such modifications are therefore intended to be encompassed within the scope of this invention. The order or sequence of any process or method steps may be altered or resequenced according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures described herein that perform the recited function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of this invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0051] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention).

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A locking device for a semi-trailer traction seat, characterized in that: include: A traction mechanism (100), the traction mechanism (100) comprising a support (101), a fixing assembly (102) disposed at the bottom of the support (101), a through hole (103) provided in the center of the top of the support (101), a protective plate (104) fixedly mounted on the top of the support (101), and a positioning assembly (105) disposed at the bottom of the support (101); The locking mechanism (200) comprises a fixed plate (201) located outside the support (101), a rotating rod (202) rotatably mounted outside the fixed plate (201), a spiral return spring (203) fixedly mounted outside the rotating rod (202), a connecting plate (204) fixedly mounted at the end of the spiral return spring (203), and an adjusting assembly (205) arranged outside the connecting plate (204).

2. The locking device for the semi-trailer fifth wheel according to claim 1, characterized in that: The traction mechanism (100) further comprises a fixing block (106) fixedly mounted on the bottom of the support (101), a mounting plate (107) fixedly mounted on the outside of the fixing block (106), an L-shaped bent plate (108) fixedly mounted on the outside of the mounting plate (107), and a positioning rod (109) fixedly mounted on the outside of the L-shaped bent plate (108).

3. The locking device for the semi-trailer fifth wheel according to claim 2, characterized in that: The locking mechanism (200) further comprises a locking hook (206) fixedly mounted on the outside of the adjustment assembly (205), and a gripping rod (207) fixedly mounted on the top of the locking hook (206).

4. The locking device for the semi-trailer fifth wheel according to claim 3, characterized in that: The adjustment component (205) comprises a protective telescopic sleeve (205a) fixedly mounted on the outside of the connecting plate (204), a damping telescopic rod (205b) fixedly mounted in the inner cavity of the protective telescopic sleeve (205a), and a limiting hole piece (205c) fixedly mounted on the outside of the damping telescopic rod (205b).

5. The locking device for the semi-trailer fifth wheel according to claim 4, characterized in that: The adjustment component (205) further comprises a buffer spring (205d) movably sleeved on the outer surface of the damping telescopic rod (205b), and a connecting block (205e) fixedly mounted on the end of the damping telescopic rod (205b); the limiting hole piece (205c) movably sleeved on the outer surface of the damping telescopic rod (205b).

6. The locking device for the semi-trailer fifth wheel according to claim 5, characterized in that: The fixing assembly (102) comprises a support seat (102a) located at the bottom of the support (101), a shaft sleeve (102b) fixedly mounted on the top of the support seat (102a), and a damping vibration reduction spring (102c) fixedly mounted in the inner cavity of the support seat (102a).

7. The locking device for the semi-trailer fifth wheel according to claim 6, characterized in that: The fixing assembly (102) further comprises a groove (102d) formed at the bottom of the support seat (102a), and a buffer isolation pad (102e) fixedly mounted on the bottom of the damping and vibration-reducing spring (102c).

8. The locking device for the semi-trailer fifth wheel according to claim 7, characterized in that: The positioning assembly (105) comprises a lock (105a) movably mounted on the bottom of the support (101), a locking surface (105b) located outside the lock (105a), and a clamping arm (105c) rotatably mounted on the top of the lock (105a).

9. The locking device for the semi-trailer fifth wheel according to claim 8, characterized in that: The positioning assembly (105) further comprises a clamping surface (105d) located on the outside of the clamping arm (105c), and an axle seat (105e) fixedly mounted on the outside of the clamping arm (105c).

10. The locking device for the semi-trailer fifth wheel according to claim 9, characterized in that: The bent portion of the locking hook (206) is movably sleeved with the outer surface of the positioning rod (109), so as to enable the locking mechanism (200) to lock the traction mechanism (100).

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