Tire clamping mechanism for tire changer

Abstract

A tire clamping mechanism for a tire changer relates to the field of tire changers and comprises a central disc, a central hole is formed in the middle of the central disc, at least three sets of clamping jaw mechanisms are arranged on the central disc, a hydraulic cylinder is arranged at the bottom of the central disc, and a telescopic rod of the hydraulic cylinder penetrates through the central hole and then is connected with a bearing disc and a pressing assembly. The bearing disc and the downward pressing assembly can drive clamping jaws of the clamping jaw mechanism to move horizontally. According to the utility model, a parallelogram mechanism is adopted, so that the stability and the clamping force of the clamping jaw during horizontal movement are ensured; a plurality of groups of clamping jaw mechanisms can clamp the tire more uniformly, so that the stability and the efficiency of tire removal are improved; the friction force is reduced through the design of the rolling wheels, so that the clamping jaw mechanism is smoother during movement; and meanwhile, the design of the sleeve and the multiple connecting rods enables the downward pressure to be more uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of tire changing machines, in particular to a tire clamping mechanism for tire changing machines. Background Art

[0002] With the rapid development of the automotive industry, the efficiency and precision requirements for tire repair are increasing. Traditional tire changing methods are no longer able to meet the demands of modern repair operations. Vertical tire changing machines, with their compact structure and easy operation, are particularly suitable for removing small and medium-sized tires. However, existing vertical tire changing machines often suffer from complex and costly tire fixing mechanisms.

[0003] For example, a tire changer disclosed in Chinese patent CN 216153514 U utilizes a tire clamping mechanism that securely secures the tire through the complex coordination of four sets of clamping claws and five sets of electric telescopic rods. The use of multiple sets of electric telescopic rods not only increases the overall weight and volume of the equipment, but also increases maintenance difficulty and failure rate. Furthermore, the complex mechanical structure also means higher manufacturing costs, which undoubtedly poses a significant challenge for modern repair companies striving to control costs and improve efficiency. Utility Model Content

[0004] The purpose of the present invention is to solve the problems raised in the above background technology, and then proposes a tire clamping mechanism for a tire changing machine.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A tire clamping mechanism for a tire changer includes a center plate with a center hole formed in the middle of the center plate. The center plate is provided with at least three groups of claw mechanisms. A hydraulic cylinder is provided at the bottom of the center plate. The telescopic rod of the hydraulic cylinder passes through the center hole and is connected to a supporting plate and a downward pressing assembly. The supporting plate and the downward pressing assembly can drive the claws of the claw mechanism to move horizontally.

[0007] Furthermore, an external thread is formed on the end of the telescopic rod, and an upper fastening nut and a lower fastening nut are threadedly connected to the external thread, and the upper fastening nut and the lower fastening nut are respectively located on both sides of the pressing assembly.

[0008] Furthermore, the claw mechanism includes a base, on which a first rotating shaft and a second rotating shaft are provided, the first rotating shaft is installed at a corner of a triangular plate, and the triangular plate is also provided with a third rotating shaft and a fifth rotating shaft, the second rotating shaft is rotatably connected to a front swing plate, and a fourth rotating shaft is provided at the end of the front swing plate, the third rotating shaft and the fourth rotating shaft are both installed at the bottom of the claw seat, a claw is provided at the top of the claw seat, and a roller is installed on the fifth rotating shaft.

[0009] Furthermore, a rear connecting plate is provided at the bottom of the claw seat, and a third rotating shaft is provided between the two rear connecting plates.

[0010] Furthermore, a front connecting plate is provided at the bottom of the claw seat, and a fourth rotating shaft is provided between the two front connecting plates.

[0011] Furthermore, the base, the triangular plate, the front swing plate and the claw seat form a parallelogram mechanism.

[0012] Furthermore, the distance between the first rotating axis and the second rotating axis is equal to the distance between the third rotating axis and the fourth rotating axis; the distance between the first rotating axis and the third rotating axis is equal to the distance between the second rotating axis and the fourth rotating axis.

[0013] Furthermore, the pressing assembly includes a sleeve, the sleeve has at least three connecting rods in an annular array, and the ends of the connecting rods are provided with pressing rods.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts a parallelogram mechanism to ensure the stability and clamping force of the claws during horizontal movement; multiple sets of claw mechanisms can clamp the tire more evenly, improving the stability and efficiency of tire changing; the hydraulic cylinder provides powerful power, so that the claws can firmly clamp the tire; the roller design reduces friction, making the claw mechanism smoother during movement; at the same time, the design of the sleeve and multiple connecting rods makes the downward force more uniform, further improving the clamping effect of the claws. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure when the lower pressure rod is pressed on the connecting shaft between the two rollers;

[0017] Figure 3 It is a top view of the pressing component;

[0018] Among them: 1 center plate, 11 center hole, 101 first rotating shaft, 102 second rotating shaft, 103 third rotating shaft, 104 fourth rotating shaft, 105 fifth rotating shaft, 2 hydraulic cylinder, 21 bearing tray, 22 down-pressing assembly, 221 sleeve, 222 connecting rod, 223 down-pressing rod, 224 mounting hole, 23 upper fastening nut, 24 lower fastening nut, 3 claw mechanism, 31 triangular plate, 32 rear connecting plate, 33 claw seat, 34 front connecting plate, 35 claw, 36 front swing plate, 37 roller. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative work are within the scope of protection of the present invention. The present invention is further described in conjunction with the drawings and embodiments:

[0020] like Figure 1-Figure 3 As shown, a tire clamping mechanism for a tire changer includes a center plate 1 with a center hole 11 formed in the middle of the center plate. This design allows the telescopic rod of the hydraulic cylinder to pass through smoothly. The center plate is provided with at least three groups of claw mechanisms 3. Multiple groups of claw mechanisms can clamp the tire more evenly, thereby improving the stability and efficiency of the tire changer. A hydraulic cylinder 2 is provided at the bottom of the center plate. The hydraulic cylinder provides powerful power so that the claws can firmly clamp the tire. After the telescopic rod of the hydraulic cylinder passes through the center hole, it is connected to a supporting tray 21 and a pressing assembly 22. This connection method allows the supporting tray and the pressing assembly to move up and down with the extension and retraction of the telescopic rod, thereby driving the claws to move horizontally. The supporting tray and the pressing assembly can drive the claws of the claw mechanism to move horizontally.

[0021] Furthermore, an external thread is formed on the end of the telescopic rod, and an upper fastening nut 23 and a lower fastening nut 24 are threadedly connected to the external thread. The upper fastening nut and the lower fastening nut are respectively located on both sides of the pressing assembly.

[0022] In at least one embodiment, the claw mechanism includes a base that provides stable support for the entire claw mechanism. A first rotating shaft 101 and a second rotating shaft 102 are provided on the base. The first rotating shaft is installed at a corner of the triangular plate 31. The design of the triangular plate enhances the stability of the mechanism and makes the force transmission more uniform. A third rotating shaft 103 and a fifth rotating shaft 105 are also provided on the triangular plate. The second rotating shaft is rotatably connected to a front swing plate 36. A fourth rotating shaft 104 is provided at the end of the front swing plate. The third rotating shaft and the fourth rotating shaft are both installed at the bottom of the claw seat 33. A claw 35 is provided at the top of the claw seat. A roller 37 is installed on the fifth rotating shaft. The design of the roller reduces friction, making the claw mechanism smoother when moving.

[0023] Furthermore, a rear connecting plate 32 is provided at the bottom of the claw seat, and a third rotating shaft is provided between the two rear connecting plates.

[0024] Furthermore, a front connecting plate 34 is provided at the bottom of the claw seat, and a fourth rotating shaft is provided between the two front connecting plates.

[0025] Furthermore, the base, the triangular plate, the front swing plate and the claw seat form a parallelogram structure. The design of the parallelogram structure makes the claw more stable when moving horizontally and ensures the clamping force of the claw.

[0026] The solution is refined, the distance between the first rotating axis and the second rotating axis is equal to the distance between the third rotating axis and the fourth rotating axis; the distance between the first rotating axis and the third rotating axis is equal to the distance between the second rotating axis and the fourth rotating axis.

[0027] In at least one embodiment, the pressing assembly includes a sleeve 221 having at least three connecting rods 222 arranged in a circular array on the sleeve, and a pressing rod 223 provided at the end of each connecting rod. The design of the pressing rod enables the pressing assembly to directly act on the roller, thereby driving the claw to move horizontally.

[0028] Furthermore, a mounting hole 224 is formed in the middle of the sleeve for accommodating the telescopic rod of the hydraulic cylinder to pass through.

[0029] Working method: First, ensure that the tire changer is in a stable working state and accurately place the tire to be changed on the claw seat of the claw mechanism. Start the hydraulic cylinder to start working. The telescopic rod of the hydraulic cylinder begins to extend under the action of hydraulic pressure, gradually approaching the tire. When the telescopic rod is extended to a certain position, the support plate will move to the bottom of the roller, contact the roller and apply a vertical upward force to it. After receiving the force of the support plate, the roller will begin to rotate and cause the triangular plate connected to it to rotate counterclockwise around the first rotation axis. Due to the design of the parallelogram mechanism formed by the base, triangular plate, front swing plate and claw seat, when the triangular plate rotates, the claw will move in the horizontal direction, gradually clamping the wheel hub on the inner wall of the tire, ensuring that the tire will not move or fall off during the tire changing process. After the tire is clamped, the tire can be changed using other tire changing components of the tire changer. These components may include strippers, etc., which are used to separate the tire from the wheel hub.

[0030] After the tire is removed, when the wheel hub needs to be removed, retract the telescopic rod of the hydraulic cylinder. The telescopic rod begins to retract under the action of hydraulic pressure, gradually moving away from the tire. When the telescopic rod retracts to a certain position, there is a gap between the support tray and the roller, and the roller is no longer subjected to the vertical upward force of the support tray. At this time, the roller is in a free state. At this time, the down-pressing rod of the down-pressing assembly will start to work, pressing on the connecting shaft between the two rollers, giving it a downward force. Under the action of the down-pressing rod, the triangular plate will rotate clockwise around the first rotating axis, thereby driving the claw seat and the claw to move together. Driven by the triangular plate, multiple claws will move horizontally toward the direction close to the telescopic rod of the hydraulic cylinder, gradually loosening the wheel hub and completely separating it from the tire. When the claws completely loosen the wheel hub, people can easily remove the wheel hub for subsequent repairs or replacements.

[0031] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A tire clamping mechanism for a tire changing machine, characterized in that: The cam is provided with a plurality of movable parts, and the movable parts are provided with a plurality of movable parts, and the movable parts are provided with a plurality of movable parts.

2. The tire clamping mechanism for a tire changer according to claim 1, characterized in that: A rear connecting plate is provided at the bottom of the claw seat, and a third rotating shaft is provided between the two rear connecting plates.

3. The tire clamping mechanism for a tire changer according to claim 1, characterized in that: A front connecting plate is provided at the bottom of the claw seat, and a fourth rotating shaft is provided between the two front connecting plates.

4. The tire clamping mechanism for a tire changer according to any one of claims 1 to 3, characterized in that: The base, the triangular plate, the front swing plate and the claw seat form a parallelogram mechanism.

5. The tire clamping mechanism for a tire changer according to any one of claims 1 to 3, characterized in that: The distance between the first rotating axis and the second rotating axis is equal to the distance between the third rotating axis and the fourth rotating axis; the distance between the first rotating axis and the third rotating axis is equal to the distance between the second rotating axis and the fourth rotating axis.

6. The tire clamping mechanism for a tire changer according to claim 1, characterized in that: An external thread is formed on the end of the telescopic rod, and an upper fastening nut and a lower fastening nut are threadedly connected to the external thread. The upper fastening nut and the lower fastening nut are respectively located on both sides of the pressing component.

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