Swing-away tire changer and method of operation

Abstract

The present application relates to a kind of swing type tire changer and its working method, including up and down swing swing frame, the swing frame front side is equipped with the pressure plate assembly that can move forward and backward, the chuck assembly for installing wheel rim is equipped below the swing frame, the chuck assembly is installed in the front end of a seat cylinder, the seat cylinder is connected with swing arm between swing frame, the upper end of the swing arm is hinged on swing frame, lower end is hinged on seat cylinder, the swing arm is driven to swing by driving device.This tire changer simple structure, reasonable in design, small, light in weight, convenient for transportation, tire dismounting is convenient, can be used for mobile tire repair, replace pure manual tire dismounting when mobile tire repair, labor intensity is low, time is short, efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of tire changing machines, and in particular to a swing-type tire changing machine and its working method. Background Technology

[0002] When replacing or repairing car tires, the first step is to remove the tire from the rim, and then reinstall the repaired or new tire onto the rim.

[0003] Currently, auto repair shops and auto maintenance shops are equipped with relatively complete tire changers. However, these tire changers are large and heavy, making them inconvenient to move and transport. Therefore, they cannot be used for mobile tire repair. Mobile tire repair still basically relies on workers to change and replace tires, which is labor-intensive, inefficient, and time-consuming. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a small, lightweight, easy-to-transport, and convenient tire-removing and mounting machine and its working method.

[0005] The present invention is implemented by the following scheme: a swing-type tire changer, including a swing frame that can swing up and down, a pressure plate assembly that can move back and forth on the front side of the swing frame, a chuck assembly for installing wheel rims below the swing frame, the chuck assembly being installed at the front end of a seat, a swing arm being connected between the seat and the swing frame, the upper end of the swing arm being hinged to the swing frame and the lower end being hinged to the seat, and the swing arm being driven to swing by a drive device.

[0006] Furthermore, the pressure plate assembly includes a pressure plate for pressing down on the tire. The pressure plate is connected to the lower end of a connecting shaft and can rotate relative to the connecting shaft. The connecting shaft is mounted on a connecting seat through an adjustment mechanism that can adjust the vertical position of the connecting shaft.

[0007] Furthermore, the adjustment mechanism includes a connecting sleeve fixedly connected to the connecting seat, the connecting shaft passing through the middle of the connecting sleeve and being able to slide axially relative to the connecting shaft, the connecting sleeve having a pin hole on its side, the pin hole having a pin inside, and the connecting shaft having a plurality of limiting holes arranged at intervals along the axial direction on its side, one of the limiting holes being selected to engage with the pin.

[0008] Furthermore, a first hydraulic cylinder is provided at the rear of the pressure plate assembly to drive the pressure plate assembly to move back and forth.

[0009] Furthermore, a rearwardly extending guide rod is connected to the rear side of the pressure plate assembly, and a guide hole adapted to the guide rod is provided on the swing frame.

[0010] Furthermore, the pressure plate assembly is connected to a rearwardly extending guide rod, and a guide sleeve that slides with the guide rod is fitted on the guide rod. The upper end of the swing arm is provided with an extension that extends upward and connects with the guide sleeve.

[0011] Furthermore, the drive device employs a second hydraulic cylinder, the rear end of which is hinged to one of the swing arms, and the front end of which is hinged to the front end of the seat cylinder.

[0012] Furthermore, the swing frame is driven to swing up and down by a third hydraulic cylinder.

[0013] Another technical solution of the present invention: a working method of the swing-type tire changer as described above:

[0014] (1) When removing the tire, install the deflated tire rim on the chuck assembly, then control the chuck assembly to move so that the tire is close to the pressure plate assembly. Then the chuck assembly drives the tire to rotate, and control the pressure plate assembly to move and press the tire so that the tire is removed from the rim.

[0015] (2) When installing the tire, the wheel rim is installed on the chuck assembly, the tire is placed at an angle and the upper part is placed on the wheel rim. Then, the chuck assembly is moved to bring the tire closer to the pressure plate assembly. The pressure plate assembly is moved to press the tire down. At the same time, the chuck assembly drives the wheel rim and the tire to rotate so that the tire is pressed into the wheel rim.

[0016] Compared with the prior art, the present invention has the following advantages: the tire changer has a simple structure, reasonable design, small size, light weight, easy transportation, convenient tire removal and installation, and can be used for mobile tire repair. When performing mobile tire repair, it can replace pure manual tire removal and installation, with low labor intensity, short time consumption, and high efficiency.

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through specific embodiments and related drawings. Attached Figure Description

[0018] Figure 1 This is a side view of an embodiment of the present invention;

[0019] Figure 2 This is a rear view of the swing frame in its lowered state according to Embodiment 1 of the present invention;

[0020] Figure 3 This is a rear view of the swing frame in the swing state according to Embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of the chuck assembly in the forward-moving state according to Embodiment 1 of the present invention;

[0022] Figure 5 This is a schematic diagram of the chuck assembly in the rearward movement state according to Embodiment 1 of the present invention;

[0023] Figure 6 This is a side view of the tire removal state in Embodiment 1 of the present invention;

[0024] Figure 7 This is a side view of the tire loading state according to Embodiment 1 of the present invention;

[0025] Figure 8 This is a side view of Embodiment 2 of the present invention;

[0026] Explanation of the numbers in the diagram: 100-seat plate, 110-third hydraulic cylinder, 200-swing frame, 300-pressure plate assembly, 310-connecting shaft, 320-pressure plate, 330-connecting seat, 340-first hydraulic cylinder, 350-guide rod, 360-connecting sleeve, 361-pin, 370-guide sleeve, 400-chuck assembly, 500-swing arm mechanism, 510-seat cylinder, 520-swing arm, 521-extension, 530-second hydraulic cylinder, 600-wheel rim, 700-tire. Detailed Implementation

[0027] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Example 1: As Figures 1-7As shown, a swing-type tire changer includes a seat plate 100, on which a swing frame 200 capable of swinging up and down is hinged. A pressure plate assembly 300 (also called a tire-pressing assembly) capable of moving back and forth is provided on the front side of the swing frame 200, which presses the tire into or out of the rim by pressing it. A chuck assembly 400 for mounting the rim is provided below the swing frame. When the tire changer is installed, the swing frame is hinged to the seat plate 100, which can be fixed to a vehicle (such as a pickup truck, van, tricycle, etc.) or a trolley, or the loading platform or mounting frame on the transport equipment can be used directly as the seat plate. The hinge position of the swing frame is close to the edge of the seat plate. The tire changer adopts a suspended design, and during use, the swing frame... The tire changer is lowered onto the swing frame and then retracted after use. The chuck assembly 300 is installed at the front end of a base cylinder 510, which is horizontally positioned. A swing arm 520 connects the base cylinder and the swing frame. Preferably, there are two swing arms, but more than two are also possible. The upper end of the swing arm 520 is hinged to the swing frame, and the lower end is hinged to the base cylinder. The swing arm is driven to swing by a drive device. The swing arm method realizes the forward and backward movement of the chuck assembly, which can effectively simplify the structure, occupy less space, and reduce costs. This tire changer has a simple structure, reasonable design, small size, light weight, and is easy to transport. It is convenient for tire removal and installation and can be used for mobile tire repair. When performing mobile tire repair, it can replace pure manual tire removal and installation, reducing labor intensity, shortening time, and increasing efficiency.

[0030] In this embodiment, the pressure plate assembly 300 includes a pressure plate 320 for pressing down on the tire. The pressure plate 320 is connected to the lower end of a connecting shaft 310 and can rotate relative to the connecting shaft. The connecting shaft 310 is mounted on a connecting seat 330 through an adjustment mechanism that can adjust the vertical position of the connecting shaft. A bearing can be used between the pressure plate and the connecting shaft. The use of a rotatable pressure plate allows the pressure plate to rotate with the tire during tire installation and removal, reducing tire wear.

[0031] In this embodiment, the working surface of the chuck assembly faces forward, the center line of the wheel rim is horizontal when the wheel rim is mounted on the chuck assembly, the end face of the pressure plate faces forward, and the center line of the pressure plate is perpendicular to the center line of the chuck assembly. The side of the pressure plate is used to press the tire.

[0032] In this embodiment, the adjusting mechanism includes a connecting sleeve 360 ​​fixedly connected to the connecting seat 330. The connecting shaft passes through the middle of the connecting sleeve and can slide axially relative to the connecting shaft. A pin hole is opened on the side of the connecting sleeve, and a pin 361 is provided in the pin hole. Several limiting holes are arranged axially at intervals on the side of the connecting shaft. One of the limiting holes is selected to engage with the pin. The connecting shaft and the connecting sleeve are inclined, and the angle between the axis of the connecting shaft and the connecting sleeve and the vertical direction is about 20°. The connecting shaft and the connecting sleeve adopt an adjustable design to accommodate tires of different diameters. The pin 361 can be pulled out to adjust the connecting shaft by sliding it along the axis. After sliding to the correct position, the pin is reinserted so that the pin engages with the corresponding limiting hole. In order to restrict the rotation of the connecting shaft relative to the connecting sleeve, an axial rib needs to be designed on the inner side of the connecting sleeve. At the same time, an axial groove matching the axial rib needs to be designed on the connecting shaft so that the connecting shaft can only slide axially and cannot rotate. The pressure plate, the adjusting mechanism, and the connecting seat constitute the pressure plate assembly. In practice, the adjustment mechanism can also take other forms. For example, an external thread can be provided on the connecting shaft, and adjusting nuts that are locked at both ends of the connecting sleeve can be threaded to both ends of the connecting shaft. Alternatively, the connecting sleeve can be omitted, and the connecting shaft can be directly connected to the connecting seat by at least two screws. The connecting seat has a row of threaded holes for connecting the connecting shaft, and the screws can be matched with different threaded holes to adjust the vertical position of the connecting shaft.

[0033] In this embodiment, a first hydraulic cylinder 340 is provided behind the pressure plate assembly to drive the pressure plate assembly to move back and forth. The front end of the first hydraulic cylinder 340 is hinged to the connecting seat and the rear end is hinged to the rear of the swing frame.

[0034] In this embodiment, a rearwardly extending guide rod 350 is fixedly connected to the rear side of the pressure plate assembly, and a guide hole adapted to the guide rod 350 is provided on the swing frame 200. The guide rod 350 is specifically connected to the rear side of the connecting seat of the pressure plate assembly; the guide rod has a rectangular cross-section, and the guide hole is a rectangular hole adapted to the guide rod. The stability of the pressure plate assembly's back-and-forth movement is ensured by the guide rod. Since the guide rod can be retracted into the swing frame, it occupies less space. In specific implementation, other connection forms can also be used between the pressure plate assembly and the swing frame. For example, a forward-extending cantilever is provided on the front side of the swing frame, and a linear slide is installed on the cantilever. The pressure plate assembly is directly installed on the slide seat of the linear slide. Another example is a forward-extending cantilever provided on the front side of the swing frame, with the upper part of the connecting seat connected to the cantilever through a sliding joint, and a hydraulic cylinder for driving the connecting seat to move back and forth is installed on the swing frame.

[0035] In this embodiment, the driving device uses a second hydraulic cylinder 530, which is located on the upper side of the seat. The rear end of the second hydraulic cylinder is hinged to one of the swing arms, and the front end is hinged to the front end of the seat. Alternatively, the second hydraulic cylinder can be hinged at one end to one of the swing arms and at the other end to the swing frame. The second hydraulic cylinder, the seat, and the two swing arms form a swing arm mechanism. When the second hydraulic cylinder extends or retracts, it can swing the swing arms, thereby driving the seat and chuck assembly to move back and forth to adjust the distance between the wheel rim and the pressure plate mounted on the chuck assembly. In specific implementation, the driving device can also adopt other forms, such as an electric push rod, which is also hinged at one end to the seat and at the other end to one of the swing arms. Another example is a motor and a lead screw and nut pair, where the lead screw of the lead screw and nut pair is coaxially connected to the main shaft of the motor, the bottom of the motor is hinged to the seat or the swing frame, and the nut of the lead screw and nut pair is hinged to one of the swing arms.

[0036] In practical implementation, only one swing arm can be set. In this case, hydraulic cylinders need to be set between the swing arm and the swing frame, as well as between the swing arm and the seat. The hydraulic cylinder between the swing arm and the swing frame is used to drive the swing arm to swing, and the hydraulic cylinder between the swing arm and the seat is used to control the angle between the swing arm and the seat. This ensures that the seat keeps the seat in a horizontal state. However, the stability of this structure is poor. Therefore, two swing arms are preferred.

[0037] The chuck assembly includes a chuck rotatably mounted on the front end of a seat cylinder. Multiple clamping plates are hinged to the end face of the chuck, and each clamping plate has a stepped groove. A telescopic push rod passes through the center of the chuck, and an annular groove is formed at the front end of the push rod. A protrusion extending into the annular groove is provided on the clamping plate facing the center of the chuck, so that the push rod's extension or retraction causes the clamping plate to open and close. A hydraulic cylinder for driving the push rod's extension and retraction is installed inside the seat cylinder. A hydraulic motor for driving the chuck's rotation is located beside the front end of the seat cylinder. A gear is fitted on the shaft of the hydraulic motor and meshes with an internal gear ring at the rear end of the chuck. Since the chuck assembly is prior art, its structure and working principle will not be described in detail here.

[0038] In this embodiment, the swing frame 200 is driven to swing up and down by a third hydraulic cylinder 110. One end of the third hydraulic cylinder 110 is hinged to the base plate and the other end is hinged to the swing frame. In specific implementation, the swing frame can also be driven to swing by an electric push rod.

[0039] A method for operating the swing-type tire changer as described above:

[0040] (1) When removing the tire, install the deflated tire rim on the chuck assembly, then control the chuck assembly to move (backward) so that the tire is close to the pressure plate assembly. Then the chuck assembly drives the tire to rotate, and control the pressure plate assembly to move (forward) to press the tire so that the tire is removed from the rim (specifically: control the pressure plate assembly to move forward a certain distance, the pressure plate of the pressure plate assembly presses the tire so that the front toe of the tire is removed from the rim, and then control the pressure plate assembly to continue to move forward a certain distance to press the tire so that the rear toe of the tire is also removed from the rim).

[0041] (2) When installing the tire, first put the tire into the chuck assembly, then install the rim on the chuck assembly. The tire is placed at an angle and the upper part rests on the rim. Then control the chuck assembly to move (backward) so that the tire is close to the pressure plate assembly. Control the pressure plate assembly to move (forward) to press the tire while the chuck assembly drives the rim and the tire to rotate so that the tire is pressed into the rim. (Specifically: control the pressure plate assembly to move forward a certain distance, the pressure plate of the pressure plate assembly presses the tire while the chuck assembly drives the rim and the tire to rotate so that the front toe of the tire is pressed into the rim. Then control the pressure plate assembly to continue to move forward a certain distance to press the tire so that the rear toe of the tire is also pressed into the rim.)

[0042] When changing or changing tires, the swing frame rotates downwards. After use, the swing frame swings upwards to retract the tire changer.

[0043] In the specific implementation process, when installing the tire, the tire can be placed at an angle in front of the rim and rest on the rim. By controlling the pressure plate assembly to move (backward) and press the tire, the rim assembly drives the rim and tire to rotate, so that the tire is pressed into the rim.

[0044] Example 2: Figure 8 As shown, the difference between this embodiment and Embodiment 1 lies in the installation method of the pressure plate assembly. In this embodiment, the pressure plate assembly and the swing frame are not directly connected. The rear side of the pressure plate assembly 300 is connected to a rearward extending guide rod 350. The guide rod 350 is specifically connected to the rear side of the connecting seat of the pressure plate assembly. The guide rod 350 is fitted with a guide sleeve 370 that slides and engages with it. The guide rod 350 can slide and extend back and forth relative to the guide sleeve 370. The upper end of the swing arm 520 is provided with an upward extending part 521 that is connected to the guide sleeve. The extension part 521 and the guide sleeve are connected by a hinge. At this time, the front end of the first hydraulic cylinder 340 is hinged to the connecting seat and the rear end is hinged to the rear part of the guide sleeve 370.

[0045] Unless otherwise stated, if any of the technical solutions disclosed in this invention specify a numerical range, then the disclosed numerical range is a preferred numerical range. Anyone skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this invention discloses only some numerical values ​​to illustrate the technical solutions of this invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this invention.

[0046] If this invention discloses or relates to mutually fixedly connected components or structural parts, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured in one piece using a casting process) (except where it is obviously impossible to use an integral molding process).

[0047] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include states or shapes that are similar to, close to, or approximate with those states or shapes.

[0048] Any component provided by this invention can be assembled from multiple individual components or can be a single component manufactured by a one-piece molding process.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A swing-type tire changer, characterized in that: It includes a swing frame that can swing up and down, a pressure plate assembly that can move back and forth is provided on the front side of the swing frame, a chuck assembly for mounting wheel rims is provided below the swing frame, the chuck assembly is mounted on the front end of a seat, a swing arm is connected between the seat and the swing frame, the upper end of the swing arm is hinged to the swing frame and the lower end is hinged to the seat, and the swing arm is driven to swing by a drive device.

2. The swing-type tire changer according to claim 1, characterized in that: The pressure plate assembly includes a pressure plate for pressing down on the tire. The pressure plate is connected to the lower end of a connecting shaft and can rotate relative to the connecting shaft. The connecting shaft is mounted on a connecting seat through an adjustment mechanism that can adjust the vertical position of the connecting shaft.

3. The swing-type tire changer according to claim 2, characterized in that: The adjusting mechanism includes a connecting sleeve fixedly connected to the connecting seat, and a connecting shaft passing through the middle of the connecting sleeve and sliding axially relative to the connecting shaft. The side of the connecting sleeve has a pin hole, and a pin is provided in the pin hole. The side of the connecting shaft has a plurality of limiting holes arranged at intervals along the axial direction, and one of the limiting holes is selected to be inserted and engaged with the pin.

4. The swing-type tire changer according to claim 1, characterized in that: A first hydraulic cylinder is provided behind the pressure plate assembly to drive the pressure plate assembly to move back and forth.

5. The oscillating tire changer according to claim 1 or 4, characterized in that: The pressure plate assembly is connected to a rearwardly extending guide rod, and the swing frame is provided with a guide hole that matches the guide rod.

6. The swing-type tire changer according to claim 1, characterized in that: The drive device uses a second hydraulic cylinder, the rear end of which is hinged to one of the swing arms and the front end of which is hinged to the front end of the seat cylinder.

7. The swing-type tire changer according to claim 1, characterized in that: The swing frame is driven to swing up and down by a third hydraulic cylinder.

8. A method for operating a swing-type tire changer as described in claim 1, characterized in that: (1) When removing the tire, install the deflated tire rim on the chuck assembly, then control the chuck assembly to move so that the tire is close to the pressure plate assembly. Then the chuck assembly drives the tire to rotate, and control the pressure plate assembly to move and press the tire so that the tire is removed from the rim. (2) When installing the tire, the wheel rim is installed on the chuck assembly, the tire is placed at an angle and the upper part is placed on the wheel rim. Then, the chuck assembly is moved to bring the tire closer to the pressure plate assembly. The pressure plate assembly is moved to press the tire down. At the same time, the chuck assembly drives the wheel rim and the tire to rotate so that the tire is pressed into the wheel rim.

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