Tire pneumatic locking device and nut for a tire locking device

Abstract

This utility model provides a tire pneumatic locking device and a nut for the tire locking device, including a locking cylinder, a locking assembly, and a lifting flange. The locking assembly includes a locking screw, which is detachably fixed in the locking cylinder, and the lifting flange is detachably fixed above the locking cylinder. The tire pneumatic locking device with a detachable lifting flange provided by this utility model achieves rapid locking and releasing of the tire rim by moving the piston up and down in the locking cylinder, which in turn drives the locking screw up and down. It also features a large locking force, improving the efficiency and safety of tire removal.

Description

Technical Field

[0001] This utility model relates to a device for locking tires during the process of vehicle tire removal and installation, and in particular to a shaft-type pneumatic locking device for tire changers, which is suitable for tire changers. Background Technology

[0002] The tire locking device on a tire changer is a functional component used to lock tires in place for tire loading and unloading operations. Traditional tire locking devices mainly use locking discs, which secure the tire rim to the disc via a disc-shaped locking disc and chucks. Although disc-type locking devices are simple in structure, they are bulky, occupy a lot of space, and are inconvenient for loading and unloading tires. They also make it difficult to quickly adjust the position of the chucks according to the size and height of the tire. Later, a structure using a main shaft instead of a locking disc was gradually developed. During tire unloading, the tire rim is fixed to the main shaft, locking the rim to the main shaft and allowing it to rotate with the main shaft.

[0003] Existing spindle structures primarily employ manual tightening and locking devices to secure the tire rim. Examples include the discless tire changer disclosed in CN200810028111.8; an early invention patent from Yingkou Dali, CN201010189463.9, which disclosed a quick locking device; CN201710203577.6, which disclosed a quick tire locking device; CN202010849132.7, which disclosed a quick manual wheel hub locking device; CN202122202780.6, which disclosed a discless wheel hub locking system for tire changers; and CN202122039958.X, which disclosed a central locking shaft locking structure. However, manual tightening is time-consuming and labor-intensive, and the tightening force varies from person to person. Insufficient tightening force can easily damage the tire during tire removal, posing certain safety hazards.

[0004] To save manpower, pneumatic tire locking devices without large discs have been gradually developed. For example, Yingkou Tianfu has applied for multiple patents for pressurized transmission locking mechanisms for pneumatic tire changers without large discs, such as CN201220354419.3, CN201210252984.3, and CN201220435239.8. In 2013, Italian company SICAM filed a patent CN201380046724.3, which discloses a clamping unit that is mounted on the basic frame in a manner that rotates around a rotation axis and is suitable for clamping at least one vehicle wheel with a rim and a tire for assembly / disassembly. In 2023, Yingkou Chengli disclosed a shaft-type pneumatic locking device for a tire changer.

[0005] However, all of the aforementioned pneumatic tire locking devices have relatively complex locking structures, especially the intricate connection between the pneumatic piston and the locking screw. The locking groove structure is prone to damage, and the machining requirements for the locking groove are extremely high. Furthermore, the operation of inserting and locking the screw requires skilled personnel and is not easy to master, often resulting in unstable locking. Moreover, the entire locking disc is designed as a single unit, making it impossible to adjust its height according to tire size and height, thus limiting its applicability to different tire sizes. The pneumatic locking devices are also difficult to install, debug, and maintain, and have relatively high production costs. Summary of the Invention

[0006] To address the above-mentioned technical problems, the purpose of this utility model is to provide a tire pneumatic locking device with a detachable height-increasing flange. By moving the piston up and down in the locking cylinder, the locking screw moves up and down, enabling rapid locking and release of the tire rim. It also features a large locking force, improving the efficiency and safety of tire removal.

[0007] This utility model provides a tire quick locking device, including a locking cylinder, a locking assembly, and a heightening flange. The locking assembly includes a locking screw, which is detachably fixed in the locking cylinder, and the heightening flange is detachably fixed above the locking cylinder.

[0008] The locking assembly includes a centering cone and a quick-release nut.

[0009] The locking cylinder includes a locking sleeve, which is fixedly connected to the piston of the locking cylinder. The locking sleeve is used to fix the lower end of the locking screw, so that the locking screw moves up and down with the piston in the locking cylinder.

[0010] The locking cylinder also includes a lock core, which is located below the lock sleeve. The lock core is fixedly connected to the bottom of the locking cylinder via a compression spring. When the locking screw (8) is inserted into the lock sleeve (12) in the locking cylinder, after the lower end of the locking screw (8) contacts the lock core (13), the locking screw (8) is pressed down further, causing the lock core (13) to compress the compression spring (14) to the bottom. The lower end of the locking screw (8) is rotated, and the spring (14) is used to rise, so that the lower end of the locking screw (8) is limited to the limiting groove of the lock sleeve (12), thereby achieving the locking and fixing of the lock sleeve (12) and the locking screw (8).

[0011] The locking cylinder includes two air inlets / outlets. When air enters from one, air exits from the other.

[0012] The upper end of the locking cylinder includes at least one positioning hole. Preferably, the upper end of the locking cylinder includes three positioning holes.

[0013] The lower end of the heightening flange includes at least one locating pin; preferably, the lower end of the heightening flange includes three locating pins. The locating pins at the lower end of the heightening flange are matched with the positions of the locating holes at the upper end of the locking cylinder.

[0014] The upper end of the heightening flange includes a rim positioning block assembly.

[0015] The tire quick-locking device also includes a main shaft, and the locking cylinder is mounted on the main shaft.

[0016] A pneumatic rotary valve is installed on the main shaft, and the locking cylinder can rotate with the main shaft. The device also includes a base, in which the main shaft is housed.

[0017] This utility model also provides a quick-release nut, including a spring hole, a spring, a slide, a locking tooth, and a fork. The locking tooth is disposed in the slide, and the spring is disposed in the spring hole. One end of the fork is connected to the locking tooth, and the other end of the fork is connected to the spring. The locking tooth can slide in the slide along with the fork.

[0018] The upper end of the locking tooth is provided with a locking pin, and one end of the fork can be fixedly connected to the locking pin.

[0019] The other end of the fork is a pressing end.

[0020] The quick-release nut also includes a pressure cap.

[0021] Compared with the prior art, this utility model has significant technological advancements: The tire pneumatic locking device with a detachable height-increasing flange provided by this utility model can quickly lock and release the tire rim by moving the piston in the locking cylinder up and down, which drives the locking screw up and down. It also has the significant feature of strong locking force, which improves the efficiency and safety of tire removal.

[0022] The tire pneumatic locking device with a detachable riser flange provided by this utility model not only eliminates the inconvenience of manually twisting the locking device and reduces the difficulty of using and operating the device, but also greatly improves the speed of locking and releasing the tire rim and increases the locking force, avoiding safety hazards that may easily occur due to insufficient locking force. At the same time, the ingenious design of the detachable riser flange structure is not only simpler in structure than the pneumatic locking devices known in the prior art, but also can be adapted to tires of different sizes and dimensions by adjusting the height of the riser flange. Moreover, it is more convenient in installation, debugging and maintenance, making it time-saving and labor-saving to use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the tire pneumatic locking device of this utility model (orthogonal projection). Figure 2 This is a schematic diagram of the tire pneumatic locking device of this utility model (AA section). Figure 3 This is an exploded schematic diagram of the tire pneumatic locking device of this utility model; Figure 4 This is a schematic diagram of the explosion of the locking cylinder in the tire pneumatic locking device of this utility model; Figure 5 This is a schematic diagram of the explosion of the heightening flange in the tire pneumatic locking device of this utility model; Figure 6 This is an exploded schematic diagram of the quick-release nut and centering cone in the tire pneumatic locking device of this utility model; Figure 7 This is a schematic diagram of the locking cylinder in the tire pneumatic locking device of this utility model in the locking state; Figure 8 This is a schematic diagram of the locking cylinder in the tire pneumatic locking device of this utility model in the released state; Figure 9 The conventional tire pneumatic locking disc and locking screw are found in existing technologies. Notes: Base (1), Pneumatic rotary valve (2), Locking cylinder (3), Heightening flange (4), Rim positioning block assembly (5), Centering cone (6), Quick nut (7), Locking screw (8), Socket head cap screw (9), Positioning pin (10), Telescopic stop pin (11), Lock sleeve (12), Lock cylinder (13), Compression spring (14), Piston (15), Main shaft (16), Inlet / exhaust port (17), Inlet / exhaust port (18), Cylinder body (19), Round nut (20), Cylinder lower cover assembly (21), Flat washer (22), Elastic washer (23), Socket head cap screw (24), Washer (25), Socket head countersunk screw (26), Compression spring (27), Locking tooth (28), Shift fork (29), Round pressure cap (30), Internal hexagon countersunk head bolts (31), internal hexagon cylindrical bolts (32). Detailed Implementation

[0024] A schematic diagram of the tire pneumatic locking device provided by this utility model is shown below. Figure 1-3 As shown, the tire pneumatic locking device includes a fixed base (1), a main shaft (16), a pneumatic rotary valve (2), a locking cylinder (3), a heightening flange (4), a rim positioning block assembly (5), a centering cone (6), a quick nut (7), and a locking screw (8). The main shaft (16) is located in the base (1).

[0025] The locking cylinder (3) is mounted on the main shaft (16). Two internal hexagonal bolts (9) are used to fix the locking cylinder (3) on the main shaft (16). During the tire removal process, the locking cylinder (3) can rotate with the main shaft (16).

[0026] The pneumatic rotary valve (2) is fixed to the main shaft (16) using an internal hexagonal bolt (32) and can rotate with the locking cylinder (3).

[0027] The structural diagram of the heightening flange (4) is as follows: Figure 3 As shown, the lower end of the raised flange (4) is provided with three positioning pins (10), and the upper end of the locking cylinder (3) is provided with three positioning holes. The positioning pins (10) can be inserted into the positioning holes at the upper end of the locking cylinder (3) to ensure that the raised flange (4) is fixed parallel to the locking cylinder (3).

[0028] The upper end of the raised flange (4) is provided with a rim positioning block assembly (5). The rim positioning block assembly (5) cooperates with the upper hole of the raised flange (4). The retractable stop pin (11) on the rim positioning block assembly (5) cooperates with the tire rim fixing hole to position the tire rim and fix the tire rim on the raised flange (4). Figure 5 As shown, the limiting assembly consisting of the rim positioning block assembly (5) and the telescopic stop pin (11) is connected to the round hole on the raised flange (4) by a gasket (25) and an internal hexagon countersunk bolt (26). The rim positioning block assembly (5) can rotate in the hole to achieve rapid positioning of rims of different sizes.

[0029] When using the pneumatic tire locking device of this utility model, first place the tire on the raised flange (4) on the operating table of the tire changer, and then use the retractable stop pin (11) on the rim positioning block assembly (5) on the raised flange (4) to cooperate with the tire rim fixing hole to position the rim.

[0030] The schematic diagram of the centering cone (6), quick-release nut (7), and locking screw (8) is shown below. Figure 6As shown, the quick-release nut (7) includes a compression spring (27), a locking tooth (28), a shift fork (29), a circular pressure cap (30), and a countersunk head screw (31). The locking tooth (28) is located in the slide of the quick-release nut (7), the compression spring (27) is located in the compression spring hole of the quick-release nut (7), the circular hole on the shift fork (29) is engaged with the cylindrical pin on the locking tooth (28), the inner cylinder of the pressing end of the shift fork (29) is installed on the compression spring (27), the upper end of the shift fork (29) is pressed by the circular pressure cap (30), and it is fixed to the quick-release nut (7) by the countersunk head screw. The lower end of the quick-release nut (7) engages with the inner hole of the circular cone (6). The working principle is that pressing the shift fork (29) pushes the locking teeth (28) to separate the teeth from the locking screw (8). At this time, the combination of the quick-release nut (7) and the circular cone (6) can be adjusted along the locking screw (8) to adjust its position. After the adjustment is in place, the shift fork (29) is released, and the compression spring (27) pushes the shift fork (29) to drive the locking teeth (28) to engage with the locking screw (8) to achieve locking. This structure is simple and quick to install, and can realize one-handed operation to quickly adjust the position of the combination of the quick-release nut (7) and the circular cone (6) to achieve quick fixing and separation.

[0031] The structure diagram of the locking cylinder is as follows: Figure 4 As shown, its structure is such that the lock cylinder (13) is placed on the upper end of the compression spring (14), the lock cylinder (13) is set below the lock sleeve (12), the lower end of the lock sleeve (12) is connected to the internal thread of the piston (15) by the external thread, and is fixed by the external round nut (20). The lock sleeve (12) is inserted into the cylinder body (19), and the cylinder lower cover assembly (21) and the cylinder body (19) are evenly fixed along the edge by the flat washer (22), the elastic washer (23) and the internal hexagonal cylindrical bolt (24). This structure is simple in design, has uniform force, good sealing performance, and is more convenient for installation and subsequent maintenance. The lower end of the cylinder lower cover assembly (21) is provided with a fixed bend through inlet / exhaust port (17) and a straight through inlet / exhaust port (18).

[0032] The locking screw (8) cooperates with the quick nut (7) and the centering cone (6) and is inserted into the locking sleeve (12) in the center of the locking cylinder (3). After the lower end of the locking screw (8) contacts the lock core (13), the locking screw (8) is pressed down to compress the spring (14) to the bottom. The lower end of the locking screw (8) is rotated and the spring (14) is rebounded to rise, so that the lower end of the locking screw (8) is restricted to the limiting groove of the locking sleeve (12) to achieve the locking and fixing of the locking sleeve (12) and the locking screw (8). At this time, the locking screw (8) cannot be rotated. Press the fork (29) on the quick nut (7) and adjust the quick nut (7) and the centering cone (6) assembly to rotate downward along the locking screw (8) so that the centering cone (6) contacts the center hole of the tire rim to complete the initial fixing.

[0033] When it is necessary to lock the tire to the pneumatic locking device, such as Figure 7 As shown, air enters through the bent air inlet / outlet (17) at the lower end of the locking cylinder (3) and exits through the straight air inlet / outlet (18), pushing the piston (15) in the locking cylinder (3) downward. The piston (15) drives the locking sleeve (12) downward, and at the same time pulls the locking screw (8). The quick nut (7) and the centering cone (6) assembly move downward, making the centering cone (6) contact the center hole of the tire rim more tightly, thus realizing the locking of the tire rim and the main shaft (16) and completing the locking and fixing.

[0034] When it is necessary to remove the tire from the pneumatic locking device, such as Figure 8 As shown, air enters through the straight inlet / outlet (18) at the lower end of the locking cylinder (3) and exits through the bend inlet / outlet (17), pushing the piston (15) in the locking cylinder (3) upward. The piston (15) drives the locking sleeve (12) upward, and at the same time pushes the locking screw (8), quick nut (7) and centering cone (6) assembly upward, so that the centering cone (6) gradually loosens its contact with the center hole of the tire rim, realizing the release of the tire hub and the main shaft (16), pulling the locking screw (8) out of the locking sleeve (12), and completing the unlocking.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tire quick-locking device, comprising a locking cylinder, a locking assembly, and a raising flange, characterized in that: The locking assembly includes a locking screw, which is detachably fixed in the locking cylinder, and the raising flange is detachably fixed above the locking cylinder.

2. The tire quick-locking device according to claim 1, characterized in that, The locking assembly also includes a quick-release nut.

3. The tire quick-locking device according to claim 1, characterized in that, The locking cylinder includes a locking sleeve, which is fixedly connected to the piston of the locking cylinder.

4. The tire quick-locking device according to claim 3, characterized in that, The locking cylinder includes a lock core, which is located below the lock sleeve and is fixedly connected to the bottom of the locking cylinder by a compression spring.

5. The tire quick-locking device according to claim 1, characterized in that, The locking cylinder includes two air inlets and outlets.

6. The tire quick-locking device according to claim 1, characterized in that, The upper end of the locking cylinder includes three positioning holes.

7. The tire quick-locking device according to claim 6, characterized in that, The lower end of the heightening flange includes three locating pins, and the locating pins at the lower end of the heightening flange match the position of the locating hole at the upper end of the locking cylinder.

8. The tire quick-locking device according to claim 1, characterized in that, The upper end of the heightening flange includes a rim positioning block assembly.

9. A quick-release nut for a tire quick-locking device, comprising a spring hole, a spring, a slide rail, locking teeth, and a shift fork, characterized in that... The locking teeth are disposed within the slide rail, and the compression spring is disposed within the compression spring hole; one end of the shift fork is connected to the locking teeth, and the other end of the shift fork is connected to the compression spring, and the locking teeth can slide within the slide rail following the shift fork.

10. The quick-release nut for a tire quick-locking device according to claim 9, characterized in that, The upper end of the locking tooth is provided with a locking pin, one end of the shift fork can be fixedly connected to the locking pin, and the other end of the shift fork is a pressing end.

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