Lifting device for spare tire of heavy-duty car

Abstract

The utility model discloses a heavy-duty car spare tire lifting device which comprises a fixing frame and a connecting rod lifting mechanism connected to the fixing frame, a spare tire is fixedly connected to the connecting rod lifting mechanism through a clamping mechanism, and the clamping mechanism comprises a fixing disc and telescopic calipers. The fixed disc is fixedly connected to the connecting rod lifting mechanism; the telescopic calipers comprise a three-section telescopic rod, a clamping rod and a supporting rod; the three-section type telescopic rod is fixed on the fixed disc; the clamping rod is rotationally connected to the top telescopic section of the three-section telescopic rod; one end of the supporting rod is rotationally connected to the side wall of the clamping rod, and the other end is rotationally connected to the side wall of the middle-section telescopic end of the three-section telescopic rod; through the arrangement of the clamping mechanism, after the spare tire hub penetrates through the clamping mechanism, the clamping rod is opened, the spare tire hub is pressed on the fixing disc, and then the spare tire hub is lifted through the connecting rod lifting mechanism, so that the spare tire can be mounted, the mounting steps are reversely implemented when the spare tire is dismounted, the whole process is efficient and labor-saving, and the spare tire is firmly fixed.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically a heavy-duty vehicle spare tire lifting device. Background Technology

[0002] Heavy-duty trucks have large spare tires that are heavy and have high chassis, making it difficult to load and unload them. The loading and unloading process is time-consuming and labor-intensive. In addition, when the spare tire is fixed to the chassis, it needs to be clamped and secured manually, which is very laborious and can easily result in the spare tire not being securely fixed and shaking during driving. Utility Model Content

[0003] The purpose of this invention is to provide a heavy-duty vehicle spare tire lifting device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a heavy-duty vehicle spare tire lifting device, comprising a fixed frame and a linkage lifting mechanism connected to the fixed frame. The fixed frame is fixedly connected to the frame of the heavy-duty vehicle, and the spare tire is fixedly connected to the lifting end of the linkage lifting mechanism. The spare tire is fixedly connected to the lifting end of the linkage lifting mechanism via a clamping mechanism, the clamping mechanism comprising a fixed plate and a telescopic caliper fixedly connected to the center of the fixed plate. One side of the fixed plate is a plane, and the other side of the fixed plate is an annular surface, with the outer annular surface higher than the center of the annular surface. The plane of the fixed plate is fixedly connected to the linkage lifting mechanism. The telescopic caliper is located on the lifting end of the structure; the telescopic caliper includes a three-section telescopic rod, a locking rod, and a support rod; the bottom of the three-section telescopic rod is fixed to the center of one side of the fixed plate, and the center of the fixed plate is provided with a through hole for the telescopic end of the three-section telescopic rod to pass through; multiple locking rods are provided, and the end of each locking rod is rotatably connected to the top telescopic end of the three-section telescopic rod, and the locking rod rotates in a plane parallel to the telescopic direction of the three-section telescopic rod; the support rod is correspondingly provided with the locking rod, one end of the support rod is rotatably connected to the side wall of the locking rod, and the other end of the support rod is rotatably connected to the side wall of the middle telescopic end of the three-section telescopic rod.

[0005] Furthermore, a support block is provided on the annular surface of the fixed disk, and the support block is located on the inner side of the annular surface of the fixed disk.

[0006] By setting up a support block, the support block can abut against the inner ring of the spare tire's rim, providing support for the spare tire and preventing damage to the three-section telescopic rod when supporting the spare tire.

[0007] Preferably, the fixed frame is a right-angle structure, and the linkage lifting mechanism includes a hydraulic cylinder, a connecting plate, and a rocker arm. The bottom of the hydraulic cylinder is rotatably connected to one right-angle side of the fixed frame via a rotating shaft. The rocker arm is rotatably connected to the other right-angle end of the fixed frame via a rotating shaft. Two pairs of connecting plates are provided, and the connecting plates are axially symmetrical plates in both the horizontal and vertical directions. Either end of the length direction of the two pairs of connecting plates is rotatably connected to the rocker arm and the fixed frame via a rotating shaft, and the other end of the length direction of the two pairs of connecting plates is connected via a connecting shaft. The telescopic end of the hydraulic cylinder is rotatably connected to the connecting shaft.

[0008] Furthermore, the top of the fixing frame is provided with a lateral limiting slot.

[0009] When the spare tire is raised, the rocker arm is locked in the limiting slot through the limiting slot. The limiting slot can support the rocker arm and prevent the rocker arm from shaking when the car is running.

[0010] Furthermore, a through slot is provided on the annular surface of the fixed disk, and the support block is fixedly connected to the slot by bolts.

[0011] The slot allows for adjustment of the support block's fixed position, controlling the degree of fit between the support block and the spare tire rim, thus providing better support for the spare tire.

[0012] Preferably, the three-section telescopic rod is equipped with a three-section hydraulic cylinder.

[0013] The hydraulic cylinder has a strong load-bearing capacity and is suitable for lifting and lowering heavy spare tires.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model, by setting up a clamping mechanism, allows for the installation of a spare tire on the frame of a heavy-duty vehicle. The spare tire is erected on the ground, and the clamping mechanism is lowered to be flush with the center of the spare tire hub via a linkage lifting mechanism. Then, a three-section telescopic rod retracts the locking rod, which passes through the center of the spare tire hub onto the clamping mechanism. Finally, the three-section retractable rod retracts, opening the locking rod and pressing the spare tire hub against the clamping mechanism's fixed plate. The mechanism then raises the spare tire again, completing the installation. Removal is achieved by reversing the installation steps. The entire process is efficient and labor-saving, with a large hydraulic cylinder pull force ensuring a secure spare tire fixation, preventing it from easily shaking during vehicle operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the heavy-duty vehicle spare tire lifting device provided in this embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the heavy-duty vehicle spare tire lifting device provided in an embodiment of the present invention from another perspective.

[0018] Figure 3 This is a schematic diagram of the clamping mechanism structure provided in this embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the telescopic caliper in its open state according to an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the telescopic caliper in its retracted state according to an embodiment of the present invention;

[0021] In the diagram, 1-fixed frame, 2-linkage lifting mechanism, 3-spare tire, 11-limiting bayonet, 21-clamping mechanism, 22-hydraulic cylinder, 23-connecting plate, 24-rocker arm, 25-connecting shaft, 211-fixed disc, 212-telescopic caliper, 213-support block, 214-slot, 2121-three-section telescopic rod, 2122-clamping rod, 2123-support rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-5 This utility model provides a technical solution: a heavy-duty vehicle spare tire lifting device, including a fixed frame 1 and a linkage lifting mechanism 2 connected to the fixed frame 1. The fixed frame 1 is fixedly connected to the frame of the heavy-duty vehicle, and the spare tire 3 is fixedly connected to the lifting end of the linkage lifting mechanism 2 through a clamping mechanism 21. The fixed frame 1 has a right-angle structure, and a lateral limiting slot 11 is provided on the top of the fixed frame 1.

[0024] The linkage lifting mechanism 2 includes a hydraulic cylinder 22, a connecting plate 23, and a rocker arm 24. The bottom of the hydraulic cylinder 22 is rotatably connected to one right-angled side of the fixed frame 1 via a rotating shaft, and the rocker arm 24 is rotatably connected to the other right-angled side of the fixed frame 1 via a rotating shaft. Figure 1 and Figure 2 As shown, there are two pairs of connecting plates 23. The connecting plates 23 are axisymmetric plates in the horizontal and vertical directions. Any one end of the length direction of the two pairs of connecting plates 23 is rotatably connected to the rocker arm 24 and the fixed frame 1 through a rotating shaft. The other end of the length direction of the two pairs of connecting plates 23 is connected through a connecting shaft 25. The telescopic end of the hydraulic cylinder 22 is rotatably connected to the connecting shaft 25.

[0025] The clamping mechanism 21 includes a fixed plate 211 and a telescopic caliper 212 fixedly connected to the center of the fixed plate.

[0026] like Figure 3 and Figure 4 As shown, in this embodiment, considering the thinness of the wheel hub sidewall, and the need to fix the locking rod 2122 and the support rod 2123 to the sidewall of the three-section telescopic rod 2121, the three-section telescopic rod 2121 still has a minimum length after retraction. This minimum length will cause the locking rod 2122 to be unable to contact the inner side of the wheel hub when it is in the extended state after the wheel hub and the fixed plate 211 come into contact. Therefore, in order to ensure that the telescopic caliper 212 firmly clamps the spare tire 3, the side of the fixed plate 211 that comes into contact with the spare tire wheel hub is an annular surface, and the outer annular surface is higher than the center of the annular surface. After clamp 212 is fixed at the center of the annular surface, the height of the outer annular surface above the center of the annular surface is the same as the shortest length of the three-section telescopic rod 2121 after retraction, so that the clamping rod 2122 can tightly abut against the inner side of the wheel hub in the open state, thereby ensuring the clamping effect; the other side of the fixing plate 211 is a plane, and the plane of the fixing plate 211 is fixedly connected to the lifting end of the linkage lifting mechanism 2; the annular surface of the fixing plate 211 is provided with a support block 213 and a through slot 214, and the support block 213 is fixedly connected to the slot 214 by bolts.

[0027] The telescopic caliper 212 includes a three-section telescopic rod 2121, a locking rod 2122, and a support rod 2123. The bottom of the three-section telescopic rod 2121 is fixed to the center of one side of the fixed plate 211, and the center of the fixed plate 211 has a through hole for the telescopic end of the three-section telescopic rod 2121 to pass through. To ensure the stability of the spare tire 3, the pulling force of the three-section telescopic rod 2121 must be large enough. Therefore, the three-section telescopic rod 2121 adopts a three-section hydraulic cylinder. The locking rod... 2122 is provided with multiple locking rods, and the end of each locking rod 2122 is rotatably connected to the top telescopic end of the three-section telescopic rod 2121. The locking rod 2122 rotates in a plane parallel to the telescopic direction of the three-section telescopic rod 2121. The support rod 2123 is provided correspondingly to the locking rod 2122. One end of the support rod 2123 is rotatably connected to the side wall of the locking rod 2122, and the other end of the support rod 2123 is rotatably connected to the side wall of the middle telescopic end of the three-section telescopic rod 2121.

[0028] When it is necessary to equip the spare tire 3 on the frame of a heavy vehicle, the spare tire 3 is placed upright on the ground. By controlling the extension and retraction of the three-section telescopic rod 2121, the locking rod 2122 is in a retracted state. Then, by controlling the extension and retraction end of the hydraulic cylinder 22 to extend, the rocker arm 24 can be rotated downward and lowered until the clamping mechanism 21 is aligned with the center of the spare tire 3's wheel hub. The spare tire 3 is then put on the clamping mechanism 21, and the locking rod 2122 is fully extended through the clamping surface of the wheel hub, with the inner ring of the wheel hub wrapped around the outside of the support block 213. Finally, by retracting the three-section telescopic rod 2121, the locking rod 2122 is opened, and the wheel hub is pressed tightly onto the fixing plate 211, thus completing the fixing of the spare tire 3. After the spare tire 3 is fixed, the extension and retraction end of the hydraulic cylinder 22 is retracted, and the rocker arm 24 can be rotated upward until the rocker arm 24 is engaged in the limit slot 11, thereby moving the spare tire 3 onto the frame.

[0029] When it is necessary to remove the spare tire 3 from the frame of a heavy vehicle, by controlling the extension of the telescopic end of the hydraulic cylinder 22, the rocker arm 24 can rotate downwards to lower the spare tire 3 to the ground. After the spare tire 3 is on the ground, by controlling the extension of the top and middle sections of the three-section telescopic rod 2121, the clamping between the wheel hub and the clamping rod 2122 is released. After the clamping rod 2122 is far enough away from the clamped surface of the wheel hub (to avoid interference between the clamping rod 2122 and the wheel hub when it is retracted), the middle section of the three-section telescopic rod 2121 is retracted, and the clamping rod 2122 can be retracted, thereby removing the spare tire 3.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A spare tire lifting device for heavy-duty vehicles, comprising a fixed frame and a linkage lifting mechanism connected to the fixed frame, wherein the fixed frame is fixedly connected to the frame of the heavy-duty vehicle, and the spare tire is fixedly connected to the lifting end of the linkage lifting mechanism; characterized in that: The spare tire is fixedly connected to the lifting end of the linkage lifting mechanism via a clamping mechanism. The clamping mechanism includes a fixed plate and a telescopic caliper fixedly connected to the center of the fixed plate. One side of the fixed plate is a plane, and the other side is an annular surface, with the outer annular surface higher than the center of the annular surface. The plane of the fixed plate is fixedly connected to the lifting end of the linkage lifting mechanism. The telescopic caliper includes a three-section telescopic rod, a locking rod, and a support rod. The bottom of the three-section telescopic rod is fixed to the center of one side of the fixed plate, and the center of the fixed plate has a through hole for the telescopic end of the three-section telescopic rod to pass through. Multiple locking rods are provided, and the end of each locking rod is rotatably connected to the top telescopic section of the three-section telescopic rod. The locking rod rotates along a plane parallel to the telescopic direction of the three-section telescopic rod. The support rod is correspondingly provided with the locking rod. One end of the support rod is rotatably connected to the side wall of the locking rod, and the other end of the support rod is rotatably connected to the side wall of the middle telescopic end of the three-section telescopic rod.

2. The heavy-duty vehicle spare tire lifting device according to claim 1, characterized in that: A support block is provided on the annular surface of the fixed disk, and the support block is located on the inner side of the annular surface of the fixed disk.

3. The heavy-duty vehicle spare tire lifting device according to claim 1, characterized in that: The fixed frame has a right-angle structure. The linkage lifting mechanism includes a hydraulic cylinder, a connecting plate, and a rocker arm. The bottom of the hydraulic cylinder is rotatably connected to one right-angle side of the fixed frame via a rotating shaft. The rocker arm is rotatably connected to the other right-angle side of the fixed frame via a rotating shaft. There are two pairs of connecting plates, which are axially symmetrical in both the horizontal and vertical directions. Either end of the length direction of the two pairs of connecting plates is rotatably connected to the rocker arm and the fixed frame via a rotating shaft. The other ends of the length direction of the two pairs of connecting plates are connected via a connecting shaft. The telescopic end of the hydraulic cylinder is rotatably connected to the connecting shaft.

4. The heavy-duty vehicle spare tire lifting device according to claim 3, characterized in that: The top of the fixing frame is provided with a horizontal limiting slot.

5. The heavy-duty vehicle spare tire lifting device according to claim 2, characterized in that: The fixed plate has a through slot on its annular surface, and the support block is fixedly connected to the slot by bolts.

6. The heavy-duty vehicle spare tire lifting device according to claim 1, characterized in that: The three-section telescopic rod uses a three-section hydraulic cylinder.

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