A trailer spare tire mounting bracket

Abstract

The present invention discloses a trailer spare tire mounting bracket, which belongs to the technical field of trailer spare tire mounting, and comprises two support frames, each of which has a flat shoulder, and each flat shoulder is provided with a first long hole; a support plate is suspended below the two support frames, and two second long holes are symmetrically provided on the support plate; two locking rods are arranged on the support plate; a base block is fixed on the upper surface of the flat shoulder, and a through groove is provided on the base block, and a plurality of blocks are slidably connected to the base block; the present invention realizes the rapid installation of the spare tire through the flexible alignment of the second long hole and the tire screw hole. After the locking rod passes through the tire screw hole, it cooperates with the tightening of the nut, and the block is combined with the first spring to form an anti-lateral movement system. When the locking rod passes through the through groove, the block limits the locking rod to a fixed position of the through groove, effectively preventing it from lateral movement during transportation, and improving the stability of the spare tire fixation.

Description

Technical Field

[0001] The invention relates to a trailer spare tire mounting bracket and belongs to the technical field of trailer spare tire mounting. Background Art

[0002] In order to cope with the bolt hole spacing of tires of different sizes, elongated holes (also called elongated slots or slide slots) are provided on the spare tire bracket and the support plate. This design allows the user to flexibly match the bolt hole layout of different tires by adjusting the position of the bolts in the elongated holes according to actual needs, thereby achieving the installation of the spare tire.

[0003] However, it is this flexibility that brings convenience but also poses a safety hazard. Although the elongated hole is easy to adjust, it is difficult to provide sufficient stability and precision when tightening the bolts compared to the precise round hole or threaded hole. During the driving process of the vehicle, especially when encountering sudden vibrations or violent bumps, this unstable connection point is very susceptible to impact, causing the bolts to loosen or the tightening force to decrease.

[0004] When the bolts loosen to a certain extent, the fixing effect of the spare tire will be greatly reduced, or even completely ineffective, leading to the serious consequence of the spare tire falling off. Once the spare tire falls off, it will not only directly threaten the driving safety of the vehicle itself, but may also hit surrounding vehicles or pedestrians due to uncontrolled rolling, causing a wider range of safety accidents. Summary of the invention

[0005] The object of the present invention is to provide a trailer spare tire mounting bracket to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a trailer spare tire mounting bracket, comprising:

[0007] Two symmetrical support frames, each of which has a horizontal flat shoulder, and each flat shoulder is provided with a first long hole;

[0008] A lifter, the lifter being fixed between two support frames;

[0009] A support plate, the support plate is suspended below the two support frames through a chain on a lifter, and two second long holes are symmetrically provided on the support plate;

[0010] Two locking rods, the lower ends of the two locking rods are fixed with end blocks, and the upper ends of the locking rods are provided with external threads;

[0011] A base block, the base block is fixed on the upper surface of the flat shoulder, a through groove is formed on the base block, the through groove coincides with the first long hole provided on the flat shoulder, and the upper end of the locking rod sequentially passes through the second long hole, the tire screw hole, the first long hole and the through groove, and then engages with the nut to achieve the fastening of the tire;

[0012] A plurality of stoppers are slidably connected to the base block and are located on both sides of the through slot, each stopper being connected to the base block via a first spring so that the stopper can slide in a direction perpendicular to the length direction of the through slot;

[0013] Each stopper extends into the interior of the through slot, the stoppers on the same side of the through slot are arranged in parallel, and the stoppers on both sides of the through slot are pressed against each other one by one to limit the lateral movement of the locking rod in the through slot.

[0014] Preferably, the interior of the locking rod is provided with:

[0015] A vertical slider, the vertical slider slides along the axial direction of the locking rod, and a compression rod is fixed to the upper end of the vertical slider;

[0016] A horizontal slider, which slides along the radial direction of the locking rod, one side of the horizontal slider is connected to the vertical slider, and the side of the horizontal slider away from the vertical slider extends to the outside of the locking rod;

[0017] A pressing screw rod, the pressing screw rod is meshedly connected to the threaded end of the locking rod, the lower end of the pressing screw rod presses the pressure rod, and the upper end of the pressing screw rod is provided with a driving head;

[0018] Wherein, a first inclined wall is arranged on the side wall of the vertical sliding block, and a second inclined wall is arranged on the side wall of the horizontal sliding block, and the first inclined wall is slidably connected to the second inclined wall.

[0019] Preferably, a plug-in column is fixed on the side wall of the horizontal slide block, and a plug-in groove is provided on the side wall of the stopper;

[0020] When the horizontal sliding block abuts against the stopper, the plug-in column is plugged into the inside of the plug-in slot.

[0021] Preferably, the nut and the top pressing screw are tightened in opposite directions;

[0022] A ring block is fixed on the nut, and a ring groove is provided on the side wall of the ring block;

[0023] A brake rod is slidably inserted on the driving head, a first fastening bolt is engaged on the side wall of the driving head, a threaded end of the first fastening bolt is pressed against the side wall of the brake rod, a second fastening bolt is engaged at the lower end of the brake rod, and a threaded end of the second fastening bolt penetrates the side wall of the brake rod and extends to the inside of the annular groove.

[0024] Preferably, one end of the stopper extending into the through slot is in a cone shape.

[0025] Preferably, a connecting frame for connecting with a trailer is fixedly connected to the supporting frame.

[0026] Preferably, the lifter includes a shell, a rotating shaft for winding the chain is transversely arranged inside the shell, the front end of the rotating shaft passes through the side wall of the shell and is provided with a driving groove adapted to the external crank, and the lifter also includes a ratchet pawl assembly for limiting the unidirectional rotation of the rotating shaft.

[0027] Preferably, a crank frame for supporting an external crank is fixedly connected to the support frame, and a socket for inserting the external crank is formed at a position of the crank frame directly opposite to the driving slot.

[0028] Compared with existing technologies:

[0029] The present invention realizes the rapid installation of the spare tire by flexibly aligning the second long hole with the tire screw hole. After the locking rod passes through the tire screw hole, it cooperates with the tightening of the nut, and the block is combined with the first spring to form an anti-lateral movement system. When the locking rod passes through the through groove, the block limits the locking rod to a fixed position in the through groove, effectively preventing it from lateral movement during transportation, greatly improving the stability and safety of the spare tire fixation, and reducing the risk of the spare tire falling off due to bumpy road conditions.

[0030] The present invention enhances the safety of the spare tire during transportation by introducing a linkage mechanism of a vertical slider, a horizontal slider and a top-pressing screw. That is, by rotating the top-pressing screw and utilizing the force generated by the downward pressure of the screw, the vertical slider is driven to slide along the axial direction of the locking rod, and the horizontal slider is caused to expand radially outward through the design of the inclined wall until it protrudes and firmly rests against the block. Not only does it directly limit the lateral movement of the locking rod in the through groove, but the position of the block is further stabilized through the close cooperation between the plug-in column on the horizontal slider and the plug-in groove on the block. The double locking mechanism greatly improves the stability and reliability of the spare tire installation, and ensures the stability of the spare tire installation even under complex and changeable road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a cross-sectional view of the flat shoulder, support plate, locking rod and base block of the present invention.

[0033] Figure 3 It is a cross-sectional view of the locking rod and the base block of the present invention.

[0034] Figure 4 It is a schematic diagram of the structure of the flat shoulder, the supporting plate and the base block of the present invention.

[0035] Figure 5 For the present invention Figure 4 Enlarged view of point A.

[0036] Figure 6 It is a cross-sectional view of the base block, the through groove, the first spring and the stopper of the present invention.

[0037] Figure 7 It is a cross-sectional exploded view of the base block, the first spring and the stopper of the present invention.

[0038] Figure 8 It is an exploded view of the locking rod, nut and top pressing screw rod of the present invention.

[0039] Fig. 9 It is a schematic structural diagram of the locking rod of the present invention.

[0040] Fig.10 It is a cross-sectional exploded view of the locking rod, the stopper, the vertical slide block and the horizontal slide block of the present invention.

[0041] In the figure:

[0042] 1. support frame, 101. flat shoulder, 102. first long hole;

[0043] 2. lifter, 201, housing, 202, rotating shaft, 203, ratchet pawl assembly;

[0044] 3. Support plate, 301, second long hole;

[0045] 4. Locking rod, 401, end block;

[0046] 5. Base block, 501, through groove;

[0047] 6. nut, 601, boss, 602, ring block, 603, ring groove;

[0048] 7. first spring, 8. stopper, 801. plug-in slot;

[0049] 9. vertical slider, 901. pressure rod, 902. first inclined wall, 10. horizontal slider, 1001. second inclined wall, 1002. plug-in column, 11. top pressure screw rod, 1101. driving head, 12. tension spring;

[0050] 13. Connecting frame;

[0051] 14. brake lever, 15. first fastening bolt, 16. second fastening bolt;

[0052] 17. Crank stand. DETAILED DESCRIPTION

[0053] The present invention is described below with specific embodiments, but they are not intended to be limiting of the invention.

[0054] Embodiment 1

[0055] like Figure 1-Figure 10 As shown, in this embodiment, a trailer spare tire mounting bracket is provided, including two symmetrical support frames 1, to which a connecting frame 13 is fixedly connected, one end of the connecting frame 13 is fixed to the chassis of the trailer by bolts or welding, and the support frames 1 are connected to the trailer, and the two support frames 1 respectively have a horizontal flat shoulder 101, and each flat shoulder 101 is provided with a first long hole 102; a lifter 2 is fixed between the two support frames 1; a support plate 3 is suspended below the two support frames 1 by a chain on the lifter 2, and two second long holes 301 are symmetrically provided on the support plate 3.

[0056] The lifter 2 includes a shell 201, which is fixed to two support frames 1. A rotating shaft 202 for winding up the chain is horizontally arranged inside the shell 201. The front end of the rotating shaft 202 passes through the side wall of the shell 201 and is provided with a driving groove adapted to the external crank. The lifter 2 also includes a ratchet pawl assembly 203 for limiting the unidirectional rotation of the rotating shaft 202. The ratchet pawl assembly 203 is a prior art structure. The ratchet on the ratchet pawl assembly 203 is fixedly sleeved on the rotating shaft 202, and the pawl on the ratchet pawl assembly 203 rotates on the shell 201. When winding up the chain, the cooperation between the pawl and the ratchet can make the rotating shaft 202 unidirectionally rotate to wind up the chain, so that in the process of chain suspending the pallet 3, the chain and the pallet 3 can stably lift the tire upwards. When the pawl is separated from the ratchet, the function of the ratchet pawl assembly 203 to limit the unidirectional rotation of the rotating shaft 202 is eliminated. At this time, the rotating shaft 202 can release the chain, thereby putting down the tire. A crank frame 17 for supporting an external crank is fixedly connected to the support frame 1, and a socket for inserting the external crank is provided at the crank frame 17 directly opposite to the driving slot.

[0057] Two locking rods 4 are arranged on the support plate 3, and the lower ends of the two locking rods 4 are fixed with end blocks 401. Figure 2 and Fig. 9As shown, the shape of the end block 401 is square, and a recessed groove is provided on the lower surface of the support plate 3. When the locking rod 4 is inserted into the second long hole 301, the end block 401 is located in the recessed groove, and the end block 401 can be against the recessed groove wall to limit the angle of the locking rod 4 and prevent the locking rod 4 from rotating. The upper end of the locking rod 4 is provided with an external thread; a base block 5 is fixed to the upper surface of the flat shoulder 101, and a through groove 501 is provided on the base block 5. The through groove 501 coincides with the first long hole 102 provided on the flat shoulder 101, and the upper end of the locking rod 4 successively passes through the second long hole 301, the tire screw hole, the first long hole 102 and the through groove 501, and then engages with the nut 6 to achieve the fastening of the tire. The nut 6 An annular boss 601 is arranged on the side wall, and the diameter of the boss 601 is larger than the width of the through-slot 501. When the nut 6 is screwed on the upper end of the locking rod 4, the boss 601 can abut against the upper surface of the base block 5. A plurality of blocks 8 are slidably connected on the base block 5 and located on both sides of the through-slot 501. Each block 8 is connected to the base block 5 through a first spring 7, so that the block 8 can slide in a direction perpendicular to the length direction of the through-slot 501. Each block 8 extends to the inside of the through-slot 501, and the blocks 8 located on the same side of the through-slot 501 are arranged in parallel, and the blocks 8 located on both sides of the through-slot 501 are pressed against each other one by one to limit the lateral movement of the locking rod 4 in the through-slot 501.

[0058] First, by operating the lifter 2, the height of the support plate 3 can be flexibly adjusted. The lifter 2 suspends the support plate 3 below the two support frames 1 through a chain to ensure the stability of the tire during the lifting process.

[0059] Tire installation: Place the tire horizontally on the ground directly below the support frame 1, pass the support plate 3 through the center of the tire and place it horizontally on the lower surface of the tire rim, insert the locking rod 4 into the second long hole 301, and adjust the position of the locking rod 4 on the second long hole 301 so that the locking rod 4 is aligned with the screw hole of the tire, and insert the locking rod 4 into the corresponding screw hole of the tire. Next, use the rotating shaft 202 of the lifter 2 to rotate the winding chain, and the support plate 3 will lift the tire. As the tire rises, the upper end of the locking rod 4 will pass upward from the first long hole 102 and the through groove 501. When the upper surface of the tire rim is against the lower surface of the flat shoulder 101, the nut 6 is then screwed on the upper end of the locking rod 4 to tighten the tire.

[0060] Anti-lateral movement: Combined Figure 2 and Figure 6 As shown, in the process of the locking rod 4 passing through the through groove 501, the block 8 located directly above the locking rod 4 is squeezed to both sides by the locking rod 4, and the remaining block 8 is always horizontally placed in the through groove 501 under the pressure of the corresponding first spring 7. These block blocks 8 effectively prevent the locking rod 4 from lateral movement in the through groove 501, thereby enhancing the stability and safety of tire fixation.

[0061] One end of the stopper 8 extending into the through groove 501 is in a conical shape. After the two opposite ends of the stopper 8 are connected in the through groove 501, a V-shaped groove is formed at the bottom and top of the two stoppers 8. The V-shaped groove cooperates with the locking rod 4. When the locking rod 4 squeezes the stopper 8, it is conducive to the stopper 8 sliding out of the through groove 501.

[0062] Embodiment 2

[0063] like Figure 3 , Fig. 9 and Fig.10 As shown, on the basis of the first embodiment, in order to further prevent the locking rod 4 from moving laterally in the through groove 501, a vertical slider 9 and a horizontal slider 10 are provided inside the locking rod 4. The vertical slider 9 slides along the axial direction of the locking rod 4, and a compression rod 901 is fixed to the upper end of the vertical slider 9; the horizontal slider 10 slides along the radial direction of the locking rod 4, and one side of the horizontal slider 10 is connected to the vertical slider 9, and the side of the horizontal slider 10 away from the vertical slider 9 extends to the outside of the locking rod 4; the threaded end of the locking rod 4 is meshedly connected with a pressing screw 11, and the lower end of the pressing screw 11 presses the compression rod 901, and the upper end of the pressing screw 11 is provided with a driving head 1101.

[0064] A first inclined wall 902 is disposed on the side wall of the vertical slider 9 , and a second inclined wall 1001 is disposed on the side wall of the horizontal slider 10 . The first inclined wall 902 is slidably connected to the second inclined wall 1001 .

[0065] A tension spring 12 is provided between the horizontal slider 10 and the locking rod 4. One end of the tension spring 12 is fixed to the side wall of the horizontal slider 10, and the other end of the tension spring 12 is fixed to the side wall of the locking rod 4. When no external force is applied, Figure 3 As shown, under the tension of the tension spring 12 , the vertical slider 9 and the horizontal slider 10 are in their initial positions, and at this time, the horizontal slider 10 does not protrude from the outside of the locking rod 4 at all.

[0066] Locking process: When the locking rod 4 needs to be fixed, the driving head 1101 of the pressing screw 11 is rotated to move the pressing screw 11 downward along the threaded end of the locking rod 4. As the lower end of the pressing screw 11 gradually approaches and presses the pressure rod 901, the vertical slider 9 is subjected to downward pressure and begins to slide downward along the axial direction of the locking rod 4.

[0067] Linkage effect: When the vertical slider 9 slides down, the first inclined wall 902 on its side wall and the second inclined wall 1001 on the side wall of the horizontal slider 10 slide relative to each other and produce extrusion (the first inclined wall 902 and the second inclined wall 1001 are always in contact). Due to the design of this inclined wall, the extrusion effect causes the horizontal slider 10 to slide outward along the radial direction of the locking rod 4 until its protruding part abuts against the side wall of the stopper 8.

[0068] Stable state: When the horizontal sliders 10 on the two opposite locking rods 4 slide outward and respectively abut against the stopper 8, they together form a stable locking structure, which effectively prevents the locking rod 4 from lateral movement in the through groove 501.

[0069] In order to prevent the block 8 against which the horizontal slider 10 abuts from sliding laterally relative to the through groove 501, a plug-in column 1002 is fixed on the side wall of the horizontal slider 10, and a plug-in groove 801 is opened on the side wall of the block 8; when the horizontal slider 10 abuts against the block 8, the plug-in column 1002 is plugged into the inside of the plug-in groove 801.

[0070] like Fig.10 As shown, the cross slide 10 abuts against two corresponding blocks 8, both blocks 8 are provided with plug-in grooves 801, and the number of plug-in columns 1002 on the cross slide 10 is two. When the cross slide 10 abuts against the block 8, the two plug-in columns 1002 are respectively plugged into the plug-in grooves 801 provided on the two blocks 8. With the cooperation of the plug-in columns 1002 and the plug-in grooves 801, the block 8 can be relatively fixed in the through groove 501, effectively preventing the block 8 from compressing the first spring 7 and moving.

[0071] Embodiment 3

[0072] like Figure 4 , Figure 5 and Figure 8 As shown, on the basis of the second embodiment, in order to prevent the nut 6 and the top pressing screw 11 from loosening, the tightening directions of the nut 6 and the top pressing screw 11 are opposite; a ring block 602 is fixed on the nut 6, and a ring groove 603 is opened on the side wall of the ring block 602; a brake rod 14 is slidably inserted on the driving head 1101, and a first fastening bolt 15 is meshed on the side wall of the driving head 1101, and the threaded end of the first fastening bolt 15 is tightly pressed against the side wall of the brake rod 14, and the lower end of the brake rod 14 is meshed with a second fastening bolt 16, and the threaded end of the second fastening bolt 16 penetrates the side wall of the brake rod 14 and extends to the inside of the ring groove 603.

[0073] like Figure 5 As shown, the sliding of the brake rod 14 on the driving head 1101 can make the second fastening bolt 16 face the annular groove 603, and the brake rod 14 and the driving head 1101 are fixed as a whole by using the first fastening bolt 15. At this time, the second fastening bolt 16 is rotated, and the threaded end of the second fastening bolt 16 extends to the inside of the annular groove 603. At this time, with the cooperation of the brake rod 14, the first fastening bolt 15 and the second fastening bolt 16, the distance between the driving head 1101 and the nut 6 is limited. Once the nut 6 or the pressing screw 11 rotates alone, they will be restricted by the brake rod 14, the first fastening bolt 15 and the second fastening bolt 16 and cannot rotate, thereby effectively preventing the nut 6 and the pressing screw 11 from loosening.

[0074] When disassembly is required, it is only necessary to turn the threaded end of the second fastening bolt 16 out of the annular groove 603 , and then the nut 6 or the pressing screw rod 11 can be screwed separately.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A trailer spare tire mounting bracket, characterized in that: include: Two symmetrical support frames (1), each of the two support frames (1) having a horizontal flat shoulder (101), and each flat shoulder (101) having a first long hole (102); A lifter (2), wherein the lifter (2) is fixed between two support frames (1); A support plate (3), the support plate (3) being suspended below the two support frames (1) via a chain on the lifter (2), and the support plate (3) being symmetrically provided with two second long holes (301); Two locking rods (4), the lower ends of the two locking rods (4) are both fixed with end blocks (401), and the upper ends of the locking rods (4) are provided with external threads; A base block (5), the base block (5) being fixed on the upper surface of the flat shoulder (101), the base block (5) being provided with a through groove (501), the through groove (501) being coincident with a first long hole (102) provided on the flat shoulder (101), and the upper end of the locking rod (4) being passed through the second long hole (301), the tire screw hole, the first long hole (102) and the through groove (501) in sequence, and then being engaged with the nut (6); A plurality of stoppers (8) are slidably connected to the base block (5) and are located on both sides of the through slot (501), each stopper (8) being connected to the base block (5) via a first spring (7), so that the stopper (8) can slide in a direction perpendicular to the length direction of the through slot (501); Each stopper (8) extends into the interior of the through-groove (501), the stoppers (8) located on the same side of the through-groove (501) are arranged in parallel, and the stoppers (8) located on both sides of the through-groove (501) are pressed against each other one by one to limit the lateral movement of the locking rod (4) in the through-groove (501); The locking rod (4) is internally provided with: A vertical slider (9), the vertical slider (9) slides along the axial direction of the locking rod (4), and a compression rod (901) is fixed to the upper end of the vertical slider (9); A horizontal slider (10), the horizontal slider (10) slides along the radial direction of the locking rod (4), one side of the horizontal slider (10) is connected to the vertical slider (9), and the side of the horizontal slider (10) away from the vertical slider (9) extends to the outside of the locking rod (4); A pressing screw rod (11), the pressing screw rod (11) is meshedly connected to the threaded end of the locking rod (4), the lower end of the pressing screw rod (11) presses the pressure rod (901), and the upper end of the pressing screw rod (11) is provided with a driving head (1101); Wherein, a first inclined wall (902) is provided on the side wall of the vertical sliding block (9), a second inclined wall (1001) is provided on the side wall of the horizontal sliding block (10), and the first inclined wall (902) is slidably connected to the second inclined wall (1001); A plug-in column (1002) is fixed on the side wall of the horizontal slide block (10), and a plug-in groove (801) is provided on the side wall of the stopper (8); When the horizontal slide block (10) abuts against the stopper (8), the plug-in column (1002) is plugged into the inside of the plug-in groove (801); The tightening directions of the nut (6) and the top pressure screw rod (11) are opposite; A ring block (602) is fixed on the nut (6), and a ring groove (603) is formed on the side wall of the ring block (602); A brake rod (14) is slidably inserted into the driving head (1101), a first fastening bolt (15) is engaged with the side wall of the driving head (1101), a threaded end of the first fastening bolt (15) is pressed against the side wall of the brake rod (14), a second fastening bolt (16) is engaged with the lower end of the brake rod (14), and a threaded end of the second fastening bolt (16) penetrates the side wall of the brake rod (14) and extends to the inside of the annular groove (603).

2. A trailer spare tire mounting bracket according to claim 1, characterized in that: One end of the stopper (8) extending into the through slot (501) is in a cone shape.

3. The trailer spare tire mounting bracket according to claim 1, characterized in that: A connecting frame (13) for connecting to a trailer is fixedly connected to the supporting frame (1).

4. The trailer spare tire mounting bracket according to claim 1, characterized in that: The lifter (2) comprises a housing (201), a rotating shaft (202) for winding up a chain is transversely arranged inside the housing (201), a front end of the rotating shaft (202) passes through a side wall of the housing (201) and is provided with a driving groove adapted to an external crank, and the lifter (2) further comprises a ratchet pawl assembly (203) for limiting unidirectional rotation of the rotating shaft (202).

5. A trailer spare tire mounting bracket according to claim 4, characterized in that: A crank frame (17) for supporting an external crank is fixedly connected to the support frame (1), and a plug hole for inserting the external crank is provided at a position of the crank frame (17) directly opposite the driving slot.

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