Novel tire dismounting tool
By designing a new tire removal and installation tool with a T-shaped pry bar and a tightening device, the problems of high cost, large size and difficult operation of existing equipment have been solved. This tool enables low-cost, portable and easy-to-use tire removal and installation, protects the wheel rim and tire, and reduces maintenance difficulty.
Patent Information
- Application Number
- CN202520302098.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Existing tire removal and installation equipment is expensive, bulky and inconvenient to carry. Using ordinary pry bars to remove and install tires damages the rims and tires and consumes a lot of physical strength, requiring highly skilled maintenance personnel.
Design a new tire removal and installation tool that includes a T-shaped pry bar and a tightening device. The T-shaped pry bar consists of a handle, a pry bar, a locking point, and a rubber sheet. The tightening device consists of a tightener and a flat strap. The tire is loosened by the tightening device and can be easily removed by using the T-shaped pry bar. The increased space during installation makes it easier to press.
It reduces equipment costs, the tools are small and easy to carry, it reduces damage to wheel hubs and tires, reduces the physical exertion and technical requirements of maintenance personnel, and simplifies the disassembly and assembly process.
Smart Images
Figure CN223720574U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vehicle maintenance technical field especially relates to a new tire dismounting tool. BACKGROUND
[0002] In vehicle maintenance work, the tire dismounting is a common task. Most of the existing tire dismounting machines are composed of machine claws and expensive components such as bird heads, which leads to high cost. At the same time, these machines are bulky, inconvenient to carry and transport in actual use scenarios such as field operation, small repair shops, etc., greatly limiting their use range.
[0003] If the existing ordinary crowbar is used for tire dismounting, there are many drawbacks in the operation process. When dismounting and installing the tire, the maintenance personnel need to pry along the joint of the tire and the hub with great force. This operation method not only easily damages the hub and the tire, reduces the service life, but also greatly consumes the physical strength of the maintenance personnel, and at the same time, the maintenance personnel need to have high manual technical level, which increases the difficulty of maintenance work. SUMMARY
[0004] The utility model aims at providing a new tire dismounting tool to solve the problems of high cost, large size and inconvenience of carrying of the existing tire dismounting equipment, and the problems of damage to the hub and tire by ordinary crowbar dismounting, consumption of a large amount of physical strength, and high requirement for manual technical level of the maintenance personnel.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a new tire dismounting tool, comprising a T-shaped crowbar and a tightener, which are two independent tools.
[0006] The T-shaped crowbar comprises a handle, a crowbar, a first clamping point, a second clamping point, a rubber sheet and a bandage. The handle 1 is a round rod body, and the center position is fixedly connected with the tail end of the crowbar. The crowbar is long strip-shaped, and at least the upper and lower surfaces are flat. The front section is provided with a first countersunk hole, a second countersunk hole and a third hole. The upper surface of the front section is provided with a first clamping point, and the lower surface is pasted with a rubber sheet. The head is provided with a notch and is equipped with a bandage. The rubber sheet is provided with a first hole of the rubber sheet, a second hole of the rubber sheet, a third hole of the rubber sheet and a notch of the rubber sheet. The lower surface is provided with a second clamping point. The first clamping point is installed on the first countersunk hole by a first countersunk screw and a first nut to form. The second clamping point is installed on the second countersunk hole and the second hole of the rubber sheet by a second countersunk screw and a second nut to form. The bandage is wound around the notch of the rubber sheet and the notch of the crowbar, and is tightened after passing through the third hole of the rubber and the third hole of the crowbar to form the front end head of the rubber sheet and the crowbar.
[0007] The tightener comprises a first tightener, a second tightener, a third tightener, a first flat band, a second flat band, a third flat band, a fourth flat band, a first garter, a second garter, a first thimble and a second thimble; the first tightener, the second tightener and the third tightener are identical in structure and are all existing tighteners, also known as ratchet tighteners, each of which is provided with a base, a tether rod, a tightening shaft, a rocker arm, two ratchets, two washers, two latches, two ratchet cards and two springs, and the tightening shaft is provided with a slot; the first flat band is wound around the first garter, folded back and wound around the first garter again, and the folded part forms the first thimble; the other end of the first flat band is wound around the tether rod of the first tightener once, folded back and stitched with itself to be movably connected with the tether rod of the first tightener; the third flat band is folded back and stitched with itself at both ends, one end of which is passed through the slot of the tightening shaft of the first tightener to be connected with the tightening shaft of the first tightener, and the other end of which is folded back to form the second thimble; the fourth flat band is wound around the second thimble and knotted in the middle to be movably connected with the second thimble, and both ends of the fourth flat band are folded back and stitched with themselves, one end of which is passed through the slot of the tightening shaft of the second tightener to be connected with the tightening shaft of the second tightener, and the other end of which is passed through the slot of the tightening shaft of the third tightener to be connected with the tightening shaft of the third tightener; the second flat band is wound around the tether rod of the second tightener once, folded back and stitched with itself to be movably connected with the tether rod of the second tightener, and the other end of the second flat band is wound around the second garter, then wound around the tether rod of the third tightener, folded back and wound around the second garter again to be movably connected with the second garter and the tether rod of the third tightener.
[0008] Compared with the prior art, the novel tire dismounting tool has obvious advantages. The structural design is simple, the used parts are common and easy to obtain, and the overall cost is very low. At the same time, the tool is small in size, convenient to carry and store, and can be easily used whether in the field rescue or in a small repair place. When dismounting the tire, the tightener is used to tighten the tire, so that the opposite part of the tire is in a relaxed state, and then the T-shaped lever is used for prying operation, so that the dismounting work of the tire is completed. When installing, the tightener tightens the tire 1 / 4, so that the remaining tire that has not been put in has more space, and the T-shaped lever is easily pressed in. The whole process does not require strong manual skills and a lot of physical effort of the maintenance personnel, so that the dismounting work of the tire can be easily completed, and damage to the hub and the tire is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS
[0009] Fig. 1 Fig. 1 is a perspective view of the T-shaped lever (left) and the tightener (right) of the utility model
[0010] Fig. 2 is an exploded structural view of the front section of the T-shaped lever of the utility model
[0011] Fig. 3 The third flat band and the fourth flat band of the tightener are separated from the tightener state
[0012] The figure mark is explained: 1 handle; 2 crowbar; 2-1 first countersunk hole; 2-2 second countersunk hole; 2-3 third hole; 2-4 notch; 3 first clamping point; 3-1 first countersunk screw; 3-2 first nut with cap; 4 second clamping point; 4-1 second countersunk screw; 4-2 second nut with cap; 5 rubber sheet; 5-1 first hole of rubber sheet; 5-2 second hole of rubber sheet; 5-3 third hole of rubber sheet; 5-4 notch of rubber sheet; 6 bandage; 7 first tightener; 7-1 tightening shaft of first tightener; 7-2 tether rod of first tightener; 8 second tightener; 8-1 tightening shaft of second tightener; 8-2 tether rod of second tightener; 9 third tightener; 9-1 tightening shaft of third tightener; 9-2 tether rod of third tightener; 10 first flat band; 10-1 suture; 10-2 first thimble; 11 second flat band; 11-1 suture; 12 third flat band; 12-1 suture; 12-2 suture; 12-3 second thimble; 13 fourth flat band; 13-1 suture; 13-2 suture; 13-3 knot; 14 first day buckle; 15 second day buckle DETAILED DESCRIPTION
[0013] This part will describe the specific embodiments of the utility model in detail, and the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.
[0014] Please refer to Figs. 1-3 The utility model provides a technical scheme:
[0015] The above has made detailed description to the utility model embodiment combined with the drawings, but the utility model is not limited to the above-mentioned embodiment, still can make various changes in the knowledge range possessed by the ordinary skill in the art without departing from the purpose of the utility model.
[0016] Please refer to Figs. 1-3 The utility model provides the following technical scheme: novel tire dismounting tool, including T type crowbar, tightener two independent tools;
[0017] The T-shaped crowbar comprises a handle 1, a crowbar 2, a first clamping point 3, a second clamping point 4, a rubber sheet 5, and a bandage 6. The handle 1 is a round bar body, the center of which is fixedly connected with the tail end of the crowbar 2. The crowbar 2 is in a long strip shape, at least the upper and lower surfaces of which are flat. The front section is provided with a first countersunk hole 2-1, a second countersunk hole 2-2, and a third hole 2-3. The upper surface of the front section is provided with the first clamping point 3. The lower surface is pasted with the rubber sheet 5. The head is provided with a notch 2-4 and is equipped with the bandage 6. The rubber sheet 5 is provided with a first hole 5-1, a second hole 5-2, a third hole 5-3, and a notch 5-4. The lower surface is provided with the second clamping point 4. The first clamping point 3 is installed on the first countersunk hole 2-1 by a first countersunk screw 3-1 and a first nut 3-2. The second clamping point 4 is installed on the second countersunk hole 2-2 and the second hole 5-2 of the rubber sheet by a second countersunk screw 4-1 and a second nut 4-2. The bandage 6 is wound around the notch 5-4 of the rubber sheet and the notch 2-4 of the crowbar 2, and is tightened through the third hole 5-3 of the rubber sheet and the third hole 2-3 of the crowbar 2, so as to form the front end head of the crowbar 2 and the rubber sheet 5 which are tightly held by the bandage 6, thereby effectively preventing the crowbar 2 and the rubber sheet 5 from being separated.
[0018] When in use, the middle of the handle 1 and the tail end of the crowbar 2 are fixedly connected to form a T shape. Both hands hold the two ends of the handle 1, and the crowbar 2 is in the middle. This state can master the balance and prevent the T-shaped crowbar from rotating when prying. Since both hands hold the two ends of the handle 1, the tire can be pressed more stably, the palm can be pressed, and the force can be applied better. If the crowbar is in a straight strip shape, it is difficult to apply force by holding with both hands.
[0019] The tightener comprises a first tightener 7, a second tightener 8, a third tightener 9, a first flat band 10, a second flat band 11, a third flat band 12, a fourth flat band 13, a first day buckle 14, a second day buckle 15, a first sleeve 10-2, a second sleeve 12-3; the first tightener 7, the second tightener 8, and the third tightener 9 are the same structure, which are all existing and also called ratchet tightener, each of which is provided with a base, a tether rod, a tightening shaft, a rocker arm, two ratchets, two washers, two latches, two ratchet cards, and two springs, and the tightening shaft is provided with a slot; the first flat band 10 is wound around the first day buckle 14 at one end, then folded back to be wound around the first day buckle 14 again, and the folded part forms the first sleeve 10-2; the other end of the first flat band 10 is wound around the tether rod 7-2 of the first tightener for one turn, and after being folded back, is sewn with itself 10-1 to form a movable connection with the tether rod 7-2 of the first tightener; the third flat band 12 is folded back and sewn with itself 12-1, 12-2 at both ends respectively, one end of which is passed through the slot of the tightening shaft 7-1 of the first tightener to form a connection with the tightening shaft 7-1 of the first tightener, and the other end of which is folded to form the second sleeve 12-3; the fourth flat band 13 is wound around the second sleeve 12-3 and knotted in the middle 13-3 to form a movable connection between the middle of the fourth flat band 13 and the second sleeve 12-3, and both ends of which are folded back and sewn with itself 13-1, 13-2 respectively, one end of which is passed through the slot of the tightening shaft 8-1 of the second tightener to form a connection with the tightening shaft 8-1 of the second tightener, and the other end of which is passed through the slot of the tightening shaft 9-1 of the third tightener to form a connection with the tightening shaft 9-1 of the third tightener; the second flat band 11 is wound around the tether rod 8-2 of the second tightener for one turn at one end, and after being folded back, is sewn with itself 11-1 to form a movable connection with the tether rod 8-2 of the second tightener, and the other end of which is wound around the second day buckle 15, then around the tether rod 9-2 of the third tightener, and folded back to be wound around the second day buckle 15 again to form a movable connection between the second flat band 11 and the second day buckle 15 and the tether rod 9-2 of the third tightener.
[0020] When in use, the end of the flat band 10, 11, 12 connected to the tightening shaft 7-1, 8-1, 9-1 is folded and sewn at 12-1, 13-1, 13-2 to form a larger slot than the slot of the tightening shaft 7-1, 8-1, 9-1, so that when any flat band is pulled, the head part is clamped on the tightening shaft 7-1, 8-1, 9-1, effectively preventing the flat band 10, 11, 12 from being separated from the tightening shaft 7-1, 8-1, 9-1.
[0021] Remove the tire
[0022] The operator holds the T-shaped crowbar handle 1 with both hands, and presses the head of the crowbar 2 against the side of the tire. Since the palms of both hands are pressed, it is easy to exert force. The small head of the T-shaped crowbar and the small pressing area result in small resistance, making it easier to press the tire bead away from the wheel rim of the hub. The tire side is pressed gradually according to this operation until the tire bead is completely separated from the wheel rim of the hub. Next, the second collar 12-3 of the tightener is sleeved on the shaft below the hub, and the first collar 10-2 is sleeved on the shaft above the hub. The distance between the first tightener 7 and the hub shaft is adjusted by the first Chinese character buckle 14 installed on the first flat band 10, so that the first tightener 7 is positioned above the hub and does not exceed the edge of the hub, which is convenient for tightening. In this way, the first tightener 7 is connected to the upper and lower shafts of the hub, and the third flat band 12 is tightened on the tire. Then swing the swing arm of the first tightener 7, and the swing arm drives the tightening shaft 7-1 of the first tightener to rotate to tighten the third flat band 12. During the tightening process, the two sides of the tire are constantly pressed by hand to make the two tire beads enter the deepest groove of the hub. Through such operation, the tightener tightens part of the tire towards the hub shaft, making the tire opposite the tightened part more relaxed, thereby obtaining more operating space for subsequent tire prying operation. Then the head of the T-shaped crowbar is passed through the gap between the tire opposite the tightened part and the hub, and the rubber sheet 5 faces the hub during the passing to ensure that the crowbar 2 is separated from the hub by the rubber sheet 5, avoiding damage to the hub. This is the important function of the rubber sheet 5. When passing, the first clamping point 3 is just clamped to the tire bead, which will press the tire bead and make it shift to the other side, which is good for making it easier to pry off. When passing, the second clamping point 4 below the T-shaped crowbar is just clamped to the edge of the hub, which serves as a limiting function to prevent the head of the T-shaped crowbar from being damaged by being too long when passing. The operator steps on the hub to fix it, holds the T-shaped crowbar handle 1 with both hands, and pulls the hub center in the direction of the T-shaped crowbar head to pry it. After repeated operation for several times, the tire will be separated from the hub by about one quarter. At this time, the first tightener 7 is loosened and the tightener is removed. At this time, the T-shaped crowbar still needs to be pressed. For the part of the tire that has not been separated from the hub, an iron hammer is used to knock it off easily. Thus, the whole process of tire disassembly is completed.
[0023] Installing a tire
[0024] The operator presses one third of the tire into the hub with both hands to provide conditions for subsequent tightening operation. Then, the second ring 12-3 of the tightener is sleeved on the shaft below the hub, and the first ring 10-2 is sleeved on the shaft above the hub, the distance between the first tightener 7 and the hub shaft is adjusted through the first day buckle 14 installed on the first flat belt 10, so that the first tightener 7 is located above the hub and does not exceed the edge of the hub; the second flat belt 11 is hung on the shaft above the hub, and the distance between the second tightener 8 and the third tightener 9 is adjusted through the second day buckle 15 installed on the second flat belt 11, so that the second tightener 8 and the third tightener 9 are located above the hub and do not exceed the edge of the hub. Then, the third flat belt 12 and the fourth flat belt 13 are adjusted to be tightened at 1 / 4 of the tire, and it is ensured that they are within the range of the tire pressed into the hub, so as to facilitate subsequent tightening operation, so that the two ends of the three tighteners 7, 8 and 9 are connected to the upper and lower shafts of the hub, and the third flat belt 12 and the fourth flat belt 13 are tightened at 1 / 4 of the tire. Then, the swing arms of the three tighteners 7, 8 and 9 are swung, and the tightening shafts 7-1, 8-1 and 9-1 of the tighteners are rotated to tighten the third flat belt 12 and the fourth flat belt 13. During the tightening process, the two sides of the tire are pressed by hand to make the two tire beads enter the deepest groove of the hub. Through the operation, the tightener tightens one fourth of the tire towards the hub shaft, increases the space between the part of the tire not embedded in the hub and the hub, and facilitates the pressing of the remaining part of the tire into the hub. Then, the operator holds the T-shaped lever with both hands, and presses the part of the tire not embedded in the hub little by little with the head of the lever. After the tire is completely embedded, the three tighteners 7, 8 and 9 are loosened, and all the rings are disengaged, so that the tire can be installed simply and easily.
[0025] The utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the technical field without departing from the purpose of the utility model.
Claims
1. A new type of tire dismounting tool, characterized in that, The T-shaped crowbar and the tightener are used together. The T-shaped crowbar comprises a handle (1), a crowbar (2), a first clamping point (3), a second clamping point (4), a rubber sheet (5) and a bandage (6). The handle (1) is a round stick body, and the center of the handle is fixedly connected with the end of the crowbar (2) to form a T-shaped structure. The front section of the crowbar (2) is provided with a first countersunk hole (2-1), a second countersunk hole (2-2), a third hole (2-3) and a notch (2-4). The first clamping point (3) is fixed on the first countersunk hole (2-1) through a first countersunk screw (3-1) and a first nut (3-2). The second clamping point (4) is fixed on the second countersunk hole (2-2) and a second hole (5-2) of the rubber sheet (5) through a second countersunk screw (4-1) and a second nut (4-2). The rubber sheet (5) is pasted on the lower surface of the crowbar (2) and is fixedly connected with the bandage (6) through the notch (5-4) of the rubber sheet, the third hole (5-3) of the rubber sheet and the third hole (2-3) of the crowbar (2). The tightener comprises a first tightener (7), a second tightener (8), a third tightener (9), a first flat band (10), a second flat band (11), a third flat band (12), a fourth flat band (13), a first day buckle (14), a second day buckle (15), a first loop (10-2) and a second loop (12-3). The first flat band (10) forms the first loop (10-2) through the first day buckle (14) and is connected to the tether rod (7-2) of the first tightener. The two ends of the third flat band (12) are respectively folded and sewn (12-1, 12-2), one end passes through the slot hole of the tightening shaft (7-1) of the first tightener to form a connection with the tightening shaft (7-1) of the first tightener, and the other end forms a loop as the second loop (12-3). The fourth flat band (13) is wound around the second loop (12-3) and knotted in the middle (13-3) to form an active connection between the middle of the fourth flat band (13) and the second loop (12-3). The two ends are respectively folded and sewn (13-1, 13-2), one end passes through the slot hole of the tightening shaft (8-1) of the second tightener to form a connection with the tightening shaft (8-1) of the second tightener, and the other end passes through the slot hole of the tightening shaft (9-1) of the third tightener to form a connection with the tightening shaft (9-1) of the third tightener. One end of the second flat band (11) is connected to the tether rod (8-2) of the second tightener, and the other end is connected to the tether rod (9-2) of the third tightener through the second day buckle (15).
2. The new tire dismounting tool according to claim 1, characterized in that, The front end of the crowbar (2) is fixed with the rubber sheet (5) through the bandage (6), and the lower surface of the rubber sheet (5) is provided with the second clamping point (4) for limiting the edge of the hub.
3. The novel tire dismounting tool according to claim 1, wherein The first, second and third tightening devices (7, 8, 9) of the tightening device are all ratchet tightening devices, comprising a base, a tether rod, a tightening shaft, a rocker arm, two ratchets, two washers, two bolts, two ratchet cards and two springs, and the tightening shaft is provided with a slot.
4. The novel tire dismounting tool according to claim 1, wherein The first and second clamping points (3, 4) are respectively fixed by means of countersunk head screws and cap nuts, forming a detachable structure.
5. The novel tire dismounting tool according to claim 1, wherein The first, second, third and fourth flat belts (10, 11, 12, 13) of the tightening device are all made of high-strength nylon material, which has tensile resistance and cooperates with the sleeve ring structure to ensure the stability of the tightening device.
6. The new tire dismounting tool according to any one of claims 1 to 5, characterized in that, The tool is suitable for dismounting and mounting vehicle tires, and the operation space is increased by locally tightening the tire by the tightening device, and the prying operation is completed by cooperating with the T-shaped prying rod.