Adjustable semi-trailer spare tire fixing device

Abstract

The present invention relates to the technical field of vehicle accessories, and in particular to an adjustable semi-trailer spare tire fixing device, comprising a pull-out track fixedly mounted on a vehicle body, a pull-out chassis with a rectangular frame structure provided inside the pull-out track, a flip frame limiting mechanism provided on both the front and rear sides of the pull-out chassis, a pull-out chassis limiting mechanism provided at the right edge of the vehicle body, a flip frame provided on the upper side of the pull-out chassis, a longitudinal crossbeam frame provided at the right end of the flip frame, the bottom of the flip frame being rotatably connected to the right end face of the pull-out chassis through two sets of pages, two sets of symmetrical pull-out frames fixed on the left side of the crossbeam frame, a tension gas spring provided on the outer side of the flip frame, and a spare tire fixing mechanism provided on the upper side of the crossbeam frame. The device of the present invention as a whole can be pulled out, slid, and flipped, has an adjustable function, is convenient for quick access and storage of spare tires, and the device has a novel structure, is easy to operate, safe and reliable, improves the user experience, and reduces the difficulty of manual operation.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle accessories, and in particular to an adjustable semi-trailer spare tire fixing device, which is used for safe and convenient storage and retrieval of the spare tire on the semi-trailer. Background Art

[0002] A spare tire is a spare tire for a car. It is not usually used in a regular manner, but is used to replace the main tire when the main tire of the car fails or cannot be used anymore to ensure that the car can continue to drive to the repair site or a safe place. The storage location of the spare tire also varies depending on the car model. Some are placed in the car compartment (such as a built-in spare tire), some are hung on the body (such as an external spare tire), and some are fixed under the chassis (such as a chassis spare tire). Regardless of the storage method used, the spare tire needs to be properly fixed to prevent it from moving or falling off during driving, thereby ensuring driving safety.

[0003] Existing spare tire fixing devices for semi-trailers are often fixed in structure, usually connected and fixed with bolts or iron chains, which is cumbersome to operate, inconvenient for quick access and storage of spare tires, and has certain safety hazards during operation. Therefore, it is necessary to design a new adjustable spare tire fixing device for semi-trailers to solve the above problems. Summary of the invention

[0004] In view of the existing deficiencies, the present invention provides an adjustable semi-trailer spare tire fixing device, which solves the problems raised in the above-mentioned background technology. The device has a novel structure, is easy to operate, safe and reliable, and has an adjustable function, which is convenient for quick access and storage of the spare tire.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] The cam is an adjustable spare tire fixing device for a semi-trailer, comprising a pull-out rail fixedly mounted on a vehicle body part, the pull-out rail is provided with a pull-out frame of a rectangular frame structure on the inner side of the pull-out rail, and slide rail plates compatible with the pull-out rail are fixedly arranged at the front and rear edges of the pull-out frame, and the slide rail plates are snapped into the pull-out rail and slidably connected to the pull-out rail, and a turning frame limiting mechanism is provided on the front and rear sides of the pull-out frame, and a pull-out frame limiting mechanism is provided on the right edge of the vehicle body part, a turning frame is provided on the upper side of the pull-out frame, a longitudinal cross beam frame is provided at the right end of the turning frame, and the bottom of the turning frame is rotatably connected to the right end face of the pull-out frame through two sets of pages, two groups of symmetrical pull-out frames are fixed on the left side of the cross beam frame, and the two groups of pull-out frames are inserted into the turning frame and slidably connected to the turning frame, a tension gas spring is provided on the outer side of the turning frame, one end of the tension gas spring is hinged to the turning frame, and the other end is hinged to the outer end face of the cross beam frame, and a spare tire fixing mechanism is provided on the upper side of the cross beam frame.

[0007] Furthermore, a track top baffle of the same height is fixedly provided at the left end of the pull-out track.

[0008] Furthermore, the spare tire fixing mechanism includes a threaded knob, a limit chuck, a stud, a positioning boss, a spare tire frame and a spare tire bracket. The spare tire frame is welded and fixed to the left side of the crossbeam frame. An arc-shaped spare tire bracket is welded on the upper side of the crossbeam frame. A positioning boss is fixed on the spare tire frame. A stud is provided on the positioning boss. A detachable limit chuck with a circular structure is sleeved on the stud. The limit chuck is fixed to the stud by a threaded knob.

[0009] Furthermore, a layer of rubber gasket is adhered to the outer ring surface of the limiting chuck.

[0010] Furthermore, the pull-out chassis limiting mechanism includes a notch, an L-shaped limiting block, a first positioning spring pin and a slot plate frame, the slot plate frame is a U-shaped structure fixedly arranged at the right edge of the vehicle body, a rotatable L-shaped limiting block is assembled inside the slot plate frame through a pin shaft, a first positioning spring pin for limiting the rotation of the L-shaped limiting block is provided on the front surface of the slot plate frame near the right edge, and a notch for the L-shaped limiting block to pass through is opened at the right edge of the vehicle body.

[0011] Furthermore, the flip frame limiting mechanism includes a locking tongue, a base plate, a tension spring, a pull rod, a sliding plate and a positioning pin. The base plate is welded to the outer side surface of the pull-out base frame near the left end, and the base plate is hinged with a rotatable locking tongue. The lower end of the locking tongue is connected to the base plate through a tension spring. A sliding plate is fixedly provided on the outer side surface of the pull-out base frame near the right end, and a slidable and adjustable pull rod is sleeved inside the sliding plate. The left end of the pull rod is fixedly connected to the locking tongue, and a positioning pin for limiting is longitudinally inserted into the pull rod at the right side of the sliding plate.

[0012] Furthermore, the lock tongue is configured as an inverted L-shaped structure, with its short side located on the upper side, and a blocking rod is fixedly provided on the outer side of the flip frame at a position corresponding to the lock tongue, and the blocking rod can be snapped onto the lock tongue.

[0013] Furthermore, a second positioning spring pin is fixedly provided on the flip frame near the right end, and positioning holes compatible with the second positioning spring pin are opened on the pull-out frame near the left and right ends. The second positioning spring pin can be inserted into the positioning hole to limit and lock the pull-out frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention uses the sliding connection between the pull-out chassis and the pull-out rail, as well as the design of the flip frame and the pull-out frame, so that the device as a whole can be pulled out, slid, and flipped, and has an adjustable function, which is convenient for quick access and storage of the spare tire. The user can quickly complete the fixing and release of the spare tire without using complicated tools or performing cumbersome operations. The device has a novel structure, is easy to operate, safe and reliable, improves the user experience, and reduces the difficulty of manual operation.

[0016] 2. The present invention uses a sliding connection between a pull-out rail and a slide rail plate so that the pull-out chassis can be easily pulled out or pushed back into the vehicle body, which greatly simplifies the process of taking out the spare tire. No additional disassembly or installation steps are required and space is saved. At the same time, the flip frame is rotatably connected to the crossbeam frame through a hinge, so that the spare tire can be easily flipped to a position that is easy to take out, and it is also easy to flip the spare tire back to a storage state.

[0017] 3. The introduction of the tension gas spring in the present invention provides assistance for the pulling and pulling process of the pull-out frame, facilitates the pulling and pulling operation, greatly reduces the force during manual operation, makes the lifting and lowering of the spare tire easier, and also ensures the stability and safety of the spare tire during the pulling and pulling process.

[0018] 4. The spare tire fixing mechanism of the present invention is used to support and fix the spare tire to prevent the spare tire from loosening due to vibration or bumps during driving. When the spare tire needs to be fixed, first place the spare tire on the spare tire chassis, and make the spare tire card sleeve onto the positioning boss to ensure that the spare tire is in close contact with the chassis and the bracket. Then, put the limit chuck on the stud, and tighten the limit chuck on the stud by rotating the threaded knob until the spare tire is firmly fixed. During transportation, the spare tire fixing mechanism can ensure that the spare tire will not move or fall off, thereby ensuring the safety and stability of transportation.

[0019] 5. The present invention can limit the pull-out chassis through the pull-out chassis limit mechanism, and can also be conveniently folded up when not in use. When the pull-out chassis is retracted, the long side of the L-shaped limit block on the pull-out chassis limit mechanism is in a vertical state. At this time, the spring pin is inserted, and the L-shaped limit block can block the pull-out chassis in the track to prevent it from sliding out, thereby improving driving safety; when the pull-out chassis needs to be pulled out, the spring pin on the pull-out chassis limit mechanism can be pulled out first, and the pull-out chassis can be pulled out outward. At this time, the pull-out chassis will push the long side of the L-shaped limit block to rotate 90 degrees around the pin shaft until the short side is in a vertical state. When the short side is vertical, the pull-out chassis can be limited after being pulled out to prevent it from being excessively pulled out.

[0020] 6. The limit mechanism of the flip frame in the present invention is used to limit and fix the flip frame to prevent it from flipping over by itself during driving. When the flip frame needs to be locked, the flip frame is flipped to the left, and the corresponding structure on it is inserted into the lock tongue to achieve the limit fixation of the flip frame. When the limit needs to be released, the pull rod is pulled, and the lock tongue is driven to rotate around the axis through the pull rod, so that the lock tongue is disengaged from the corresponding structure on the flip frame. At this time, the locking state is released, and the flip frame can be flipped. After the flip is completed, the reset force of the tension spring causes the lock tongue to automatically return to its position.

[0021] 7. In the present invention, a second positioning spring latch is fixed near the right end of the flip frame, and the position of the pull-out frame can be limited and fixed by the second positioning spring latch, so that it is positioned at the current position to prevent it from sliding on its own. When the pull-out frame is inserted into the flip frame and is in a retracted state, the upper latch of the second positioning spring latch is inserted into the corresponding positioning hole on the pull-out frame to fix the pull-out frame and prevent it from sliding out on its own during driving; when the pull-out frame is in a vertical state and pulled out from the flip frame, the upper latch of the second positioning spring latch is inserted into the corresponding positioning hole on the pull-out frame to fix the pull-out frame in the current position and prevent it from retracting on its own under the action of the tension gas spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the disassembled structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the drawer chassis in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the first limiting mechanism in the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the drawer chassis in the present invention;

[0027] Figure 6 is a schematic structural diagram of the second limiting mechanism in the present invention;

[0028] Figure 7 It is a structural schematic diagram of the turning frame in the present invention;

[0029] Figure 8 It is a structural schematic diagram of the spare tire fixing mechanism in the present invention;

[0030] Fig. 9 It is a schematic diagram of the state of the device of the present invention when it is folded;

[0031] Fig.10 It is a schematic diagram of the state of the device of the present invention when it is unfolded.

[0032] In the figure:

[0033] 1. Car body; 2. Pull-out chassis; 3. Pull-out track; 4. Turn-over frame;

[0034] 5. Spare tire fixing mechanism; 51. Threaded knob; 52. Limiting chuck; 53. Rubber gasket; 54. Stud; 55. Positioning boss; 56. Spare tire chassis; 57. Spare tire bracket;

[0035] 6. Pull-out chassis limit mechanism; 61. Notch; 62. L-shaped limit block; 63. First positioning spring latch; 64. Slot plate frame;

[0036] 7. Rail top baffle; 8. Slide rail plate;

[0037] 9. Flip frame limit mechanism; 91. Lock tongue; 92. Bottom plate; 93. Tension spring; 94. Pull rod; 95. Sliding sleeve plate; 96. Positioning pin;

[0038] 10. Hinge; 11. Pull-out frame; 12. Stop rod; 13. Tension gas spring; 14. Second positioning spring latch; 15. Crossbeam frame. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example:

[0041] like Figures 1 to 10As shown, an adjustable spare tire fixing device for a semi-trailer comprises a pull-out rail 3 fixedly mounted on a vehicle body 1, the pull-out rail 3 provides a stable sliding foundation for a pull-out chassis 2, a pull-out chassis 2 with a rectangular frame structure is arranged inside the pull-out rail 3, and slide rail plates 8 matching the pull-out rail 3 are fixed at the front and rear edges of the pull-out chassis 2, and the slide rail plates 8 are inserted into the pull-out rail 3 and slidably connected thereto, the pull-out chassis 2 is slidably connected to the pull-out rail 3 through the slide rail plates 8, so that the spare tire fixing device can be conveniently installed. The pull-out chassis 2 can be easily pulled out and pushed back, which improves the convenience of operation. The front and rear sides of the pull-out chassis 2 are provided with a turning frame limiting mechanism 9, which is used to fix the turning frame 4 to prevent it from turning over at will. The right edge of the vehicle body 1 is provided with a pull-out chassis limiting mechanism 6, which is used to lock the position of the pull-out chassis 2 and limit the range of movement of the pull-out chassis 2 to prevent it from sliding by itself, thereby improving driving safety. The turning frame 4 is arranged on the upper side of the pull-out chassis 2, and a longitudinal crossbeam frame 15 is arranged at the right end of the turning frame 4. The bottom of the turning frame 4 is provided with two combination pages. 10 is rotatably connected to the right end face of the pull-out chassis 2, so that the flipping frame 4 can be flipped, which is convenient for taking and storing the spare tire. Two sets of symmetrical pull-out frames 11 are fixed on the left side face of the cross beam frame 15, and both sets of pull-out frames 11 are inserted into the flipping frame 4 and slidably connected thereto. A tension gas spring 13 is provided on the outer side of the flipping frame 4, one end of the tension gas spring 13 is hinged to the flipping frame 4, and the other end is hinged to the outer end face of the cross beam frame 15. The tension gas spring 13 is used to slow down the gravity when the pull-out frame 11 falls with the spare tire and lift the spare tire upward The gravity at that time provides a stable supporting force for the pull-out frame 11, reduces the manual effort, and makes the sliding of the pull-out frame 11 easier and more stable. A spare tire fixing mechanism 5 is arranged on the upper side of the crossbeam frame 15, and the spare tire fixing mechanism 5 is used to fix the spare tire, providing a stable supporting platform for the spare tire. This design solves the problem that the existing spare tire fixing device of the semi-trailer is often fixed in structure, usually connected and fixed with bolts or iron chains, which is cumbersome to operate, is not convenient for quick access and storage of the spare tire, and has certain safety hazards during operation.

[0042] In this embodiment, a rail top baffle 7 of the same height is fixedly provided at the left end of the pull-out rail 3 to limit the pull-out chassis 2 when it is pushed inward, thereby preventing the pull-out chassis 2 from excessively moving and escaping from the pull-out rail 3.

[0043] In this embodiment, the spare tire fixing mechanism 5 includes a threaded knob 51, a limit chuck 52, a stud 54, a positioning boss 55, a spare tire frame 56 and a spare tire bracket 57. The spare tire frame 56 is welded and fixed to the left side of the crossbeam frame 15. The spare tire frame 56 is the basic structure for fixing the spare tire and provides a stable support platform for the spare tire. The spare tire bracket 57 with an arc-shaped structure is welded on the upper side of the crossbeam frame 15 to hold the bottom of the spare tire and firmly fix the spare tire together with the spare tire frame 56. The arc-shaped design can better adapt to the shape of the spare tire and provide uniform support force. A positioning boss 55 is fixed on the chassis 56, providing an accurate positioning point for the spare tire. A stud 54 is provided on the positioning boss 55, and a detachable circular limit chuck 52 is sleeved on the stud 54. The limit chuck 52 is fixed on the stud 54 through a threaded knob 51. The limit chuck 52 directly contacts and fixes the spare tire to prevent the spare tire from moving or falling off during transportation. The threaded knob 51 is used to fasten the limit chuck 52 to the stud 54. The fastening degree of the limit chuck 52 can be adjusted by rotating the threaded knob 51, thereby ensuring that the spare tire is firmly fixed. The spare tire fixing mechanism 5 is used to support and fix the spare tire to prevent the spare tire from loosening by itself due to vibration or bumps during driving. When the spare tire needs to be fixed, first place the spare tire on the spare tire chassis 56, and make the spare tire card sleeve on the positioning boss 55 to ensure that the spare tire is in close contact with the chassis and the bracket. Then, the limiting chuck 52 is sleeved on the stud 54, and the limiting chuck 52 is fastened to the stud 54 by rotating the threaded knob 51 until the spare tire is firmly fixed. During transportation, the spare tire fixing mechanism 5 can ensure that the spare tire will not move or fall off, thereby ensuring the safety and stability of transportation.

[0044] In this embodiment, a layer of rubber gasket 53 is attached to the outer ring surface of the limit chuck 52. The rubber gasket 53 has a high friction coefficient and can increase the contact friction between the limit chuck 52 and the spare tire, which helps prevent the spare tire from loosening or rotating due to vibration or bumps during transportation. In addition, the rubber gasket 53, as a soft material, can play a buffering role between the limit chuck 52 and the spare tire, reducing damage to the spare tire surface caused by excessive tightening force.

[0045] In this embodiment, the pull-out chassis limiting mechanism 6 includes a notch 61, an L-shaped limiting block 62, a first positioning spring latch 63 and a slotted plate frame 64. The slotted plate frame 64 is a U-shaped structure fixedly arranged at the right edge of the vehicle body 1. A rotatable L-shaped limiting block 62 is assembled inside the slotted plate frame 64 through a pin shaft. A first positioning spring latch 63 for limiting the rotation of the L-shaped limiting block 62 is provided near the right edge of the front surface of the slotted plate frame 64. A notch 61 for the L-shaped limiting block 62 to pass through is provided at the right edge of the vehicle body 1. The pull-out chassis limiting mechanism 6 can limit the pull-out chassis 2 and can also be conveniently folded when not in use. When the drawer frame 11 is retracted, the long side of the L-shaped limit block 62 on the drawer frame limit mechanism 6 is in a vertical state. At this time, the spring pin is inserted, and the L-shaped limit block 62 can block the drawer frame 2 in the track to prevent it from sliding out, thereby improving driving safety. When the drawer frame 2 needs to be pulled out, the spring pin on the drawer frame limit mechanism 6 can be pulled out first, and the drawer frame 2 can be pulled out outward. At this time, the drawer frame 2 will push the long side of the L-shaped limit block 62 to rotate 90 degrees around the pin shaft until the short side is in a vertical state. When the short side is vertical, the drawer frame 2 can be limited after being pulled out to prevent it from being excessively pulled out.

[0046] In this embodiment, the turning frame limiting mechanism 9 includes a locking tongue 91, a bottom plate 92, a tension spring 93, a pull rod 94, a sliding plate 95 and a positioning pin 96. The bottom plate 92 is welded to the outer side surface of the pull-out bottom frame 2 near the left end. The bottom plate 92 is hinged with a rotatable locking tongue 91. The locking tongue 91 can cooperate with the corresponding structure on the turning frame 4 to achieve the limiting function. The lower end of the locking tongue 91 is connected to the bottom plate 92 through a tension spring 93 to provide a reset force for the locking tongue 91 to ensure that the locking tongue 91 can automatically return to its original position. A sliding plate 95 is fixedly arranged near the right end of the outer side of the pull-out chassis 2, and a slidingly adjustable pull rod 94 is sleeved inside the sliding plate 95. The left end of the pull rod 94 is fixedly connected to the lock tongue 91, and the locking and unlocking are achieved by pulling the pull rod 94 to control the rotation angle of the lock tongue 91. A positioning pin 96 for limiting is longitudinally inserted on the pull rod 94 at the right side of the sliding plate 95, which is used to limit the sliding position of the pull rod 94, ensuring that the pull rod 94 can be kept in a fixed position when needed, and realizing accurate limiting. The turning frame limiting mechanism 9 is used to limit and fix the turning frame 4 to prevent it from turning over by itself during driving. When the turning frame 4 needs to be locked, the turning frame 4 is turned to the left, and the corresponding structure thereon is inserted into the lock tongue 91 to achieve the limiting and fixing of the turning frame 4. When the limit needs to be released, the pull rod 94 is pulled to drive the lock tongue 91 to rotate around the axis through the pull rod 94, so that the lock tongue 91 is disengaged from the corresponding structure on the flip frame 4. At this time, the locking state is released and the flip frame 4 can be flipped. After the flip is completed, the restoring force of the tension spring 93 causes the lock tongue 91 to automatically return to its original position.

[0047] In this embodiment, the locking tongue 91 is configured as an inverted L-shaped structure, with its short side located at the upper side, and a blocking rod 12 is fixedly disposed on the outer side of the flip frame 4 at a position corresponding to the locking tongue 91, and the blocking rod 12 can be snapped onto the locking tongue 91. The locking tongue 91 of the inverted L-shaped structure can be stably matched with the blocking rod 12, thereby ensuring the stability of the connection between the flip frame 4 and the drawer chassis 2, and can effectively prevent the flip frame 4 from moving or flipping during transportation or use.

[0048] In this embodiment, a second positioning spring latch 14 is fixed near the right end of the flip frame 4, and positioning holes adapted to the second positioning spring latch 14 are provided near the left and right ends of the pull-out frame 11. The second positioning spring latch 14 can be inserted into the positioning hole to limit and lock the pull-out frame 11. The position of the pull-out frame 11 can be limited and fixed by the second positioning spring latch 14, so that it is positioned at the current position to prevent it from sliding by itself. When the pull-out frame 11 is inserted into the flip frame 4 and is in a retracted state, the upper latch of the second positioning spring latch 14 is inserted into the corresponding positioning hole on the pull-out frame 11 to fix the pull-out frame 11 and prevent it from sliding out by itself during driving; when the pull-out frame 11 is in a vertical state and pulled out from the flip frame 4, the upper latch of the second positioning spring latch 14 is inserted into the corresponding positioning hole on the pull-out frame 11, so that the pull-out frame 11 can be fixed at the current position to prevent it from retracting by itself under the action of the tension gas spring 13.

[0049] The working principle of the adjustable semi-trailer spare tire fixing device is as follows: when the spare tire is not activated, the spare tire is fixed on the spare tire fixing mechanism 5, the flip frame 4 is locked by the flip frame limiting mechanism 9, and the pull-out chassis 2 is in a retracted state;

[0050] Pull out the pull-out chassis 2: When the spare tire needs to be used, pull out the first positioning spring latch 63 on the pull-out chassis limiting mechanism 6, and pull out the pull-out chassis 2 until the short side of the L-shaped limiting block 62 is in a vertical state, thereby limiting the pull-out chassis 2;

[0051] Turn over the turning frame 4: pull the pull rod 94 to separate the locking tongue 91 from the blocking rod 12, release the locking state of the turning frame limit mechanism 9, and turn the turning frame 4 to the right by 90 degrees. At this time, the turning frame 4 is in a vertical state;

[0052] Take out the spare tire: pull out the second positioning spring latch 14, pull out the pull-out frame 11 downwards until the pull-out frame 11 is lowered to the lowest position, and insert the second positioning spring latch 14 into the positioning hole on the pull-out frame 11 to position the pull-out frame 11. In this process, the support force is provided by stretching the gas spring 13 to reduce the gravity when the pull-out frame 11 falls with the spare tire, providing a stable support force for the pull-out frame 11, reducing manual effort, and making the sliding of the pull-out frame 11 easier and more stable. Then rotate the threaded knob 51, remove the threaded knob 51 and the limit chuck 52, release the lock on the spare tire, and then remove the spare tire from the positioning boss 55;

[0053] Push back the drawer frame 11 and lock it: After the spare tire is replaced, place the replaced tire on the spare tire chassis 56, and insert it onto the positioning boss 55, then put on the limit clamp 52, and rotate the threaded knob 51 to fasten it onto the stud 54. Then pull out the second positioning spring latch 14 to unlock the drawer frame 11, push the drawer frame 11 back into the flip frame 4, and when the drawer frame 11 is in place, insert the second positioning spring latch 14 into the corresponding positioning hole on the drawer frame 11 to fix the position of the drawer frame 11;

[0054] Turn over and lock the turning frame 4: turn the turning frame 4 back to the right so that the blocking rod 12 on it is locked into the locking tongue 91, so as to achieve the limit fixation of the turning frame 4.

[0055] Push back the drawer chassis 2 and lock it: push the drawer chassis 2 back into the drawer rail 3 until the long side of the L-shaped limit block 62 is in a vertical state, insert the first positioning spring latch 63, and lock the position of the drawer chassis 2.

[0056] In summary, the adjustable semi-trailer spare tire fixing device realizes the quick access and storage of the spare tire, improves the convenience and safety of operation, and at the same time, the design of various limiting mechanisms and fixing mechanisms also ensures the stability and safety of the spare tire during transportation.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. An adjustable semi-trailer spare tire fixing device, comprising a pull-out rail (3) fixedly mounted on a vehicle body (1), characterized in that: A drawable chassis (2) of a rectangular frame structure is provided inside the drawable rail (3); slide rail plates (8) adapted to the drawable rail (3) are fixedly provided at the front and rear edges of the drawable chassis (2); the slide rail plates (8) are inserted into the drawable rail (3) and slidably connected thereto; a turning frame limiting mechanism (9) is provided on the front and rear sides of the drawable chassis (2); a drawable chassis limiting mechanism (6) is provided at the right edge of the vehicle body (1); a turning frame (4) is provided on the upper side of the drawable chassis (2); and a longitudinal transverse A beam frame (15), the bottom of the turnover frame (4) is rotatably connected to the right end surface of the pull-out bottom frame (2) through two sets of leaves (10), two sets of symmetrical pull-out frames (11) are fixedly arranged on the left side surface of the cross beam frame (15), and the two sets of pull-out frames (11) are inserted into the turnover frame (4) and slidably connected thereto, a tension gas spring (13) is arranged on the outside of the turnover frame (4), one end of the tension gas spring (13) is hinged to the turnover frame (4), and the other end is hinged to the outer end surface of the cross beam frame (15), and a spare tire fixing mechanism (5) is arranged on the upper side of the cross beam frame (15); The drawable chassis limit mechanism (6) comprises a notch (61), an L-shaped limit block (62), a first positioning spring latch (63) and a slot frame (64); the slot frame (64) is a U-shaped structure fixedly arranged at the right edge of the vehicle body (1); a rotatable L-shaped limit block (62) is mounted inside the slot frame (64) via a pin shaft; a first positioning spring latch (63) for limiting the rotation of the L-shaped limit block (62) is provided on the front surface of the slot frame (64) near the right edge; and a notch (61) for the L-shaped limit block (62) to pass through is provided at the right edge of the vehicle body (1); The tilt frame limiting mechanism (9) comprises a locking tongue (91), a bottom plate (92), a tension spring (93), a pull rod (94), a sliding plate (95) and a positioning pin (96); the bottom plate (92) is welded to the outer side surface of the drawable bottom frame (2) near the left end; the bottom plate (92) is hinged with a rotatable locking tongue (91); the lower end of the locking tongue (91) is connected to the bottom plate (92) through a tension spring (93); a sliding plate (95) is fixedly provided on the outer side surface of the drawable bottom frame (2) near the right end; a slidably adjustable pull rod (94) is sleeved inside the sliding plate (95); the left end of the pull rod (94) is fixedly connected to the locking tongue (91); a positioning pin (96) for limiting is longitudinally inserted at a position on the pull rod (94) located on the right side of the sliding plate (95).

2. The adjustable semi-trailer spare tire fixing device according to claim 1 is characterized in that: A track top baffle (7) of the same height is fixedly disposed at the left end of the pull-out track (3).

3. The adjustable semi-trailer spare tire fixing device according to claim 1 is characterized in that: The spare tire fixing mechanism (5) comprises a threaded knob (51), a limiting chuck (52), a stud (54), a positioning boss (55), a spare tire frame (56) and a spare tire bracket (57); the spare tire frame (56) is welded and fixed to the left side of the cross beam frame (15); a spare tire bracket (57) with an arc structure is welded on the upper side of the cross beam frame (15); a positioning boss (55) is fixedly provided on the spare tire frame (56); a stud (54) is provided on the positioning boss (55); a detachable limiting chuck (52) with a circular structure is sleeved on the stud (54); and the limiting chuck (52) is fixed to the stud (54) via the threaded knob (51).

4. The adjustable semi-trailer spare tire fixing device according to claim 3 is characterized in that: A layer of rubber gasket (53) is adhered to the outer ring surface of the limit chuck (52).

5. The adjustable semi-trailer spare tire fixing device according to claim 1 is characterized in that: The locking tongue (91) is configured as an inverted L-shaped structure, with its short side located at the upper side. A blocking rod (12) is fixedly provided at a position on the outer side of the flip frame (4) corresponding to the locking tongue (91), and the blocking rod (12) can be buckled onto the locking tongue (91).

6. The adjustable semi-trailer spare tire fixing device according to claim 1, characterized in that: A second positioning spring latch (14) is fixedly provided on the flip frame (4) near the right end, and positioning holes matching the second positioning spring latch (14) are provided on the pull-out frame (11) near the left and right ends. The second positioning spring latch (14) can be inserted into the positioning holes to limit and lock the pull-out frame (11).

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