Tire dismounting and mounting device

Abstract

The utility model belongs to the technical field of tire maintenance equipment, and particularly relates to a tire disassembling and assembling device which comprises a main arm, a sleeve in running fit with a hub rotating shaft is vertically and fixedly arranged on the main arm, a supporting rod is vertically and fixedly connected to one end of the main arm, the axis of the sleeve is parallel to the extending direction of the supporting rod, and a supporting arm is slidably connected into the main arm. The end, away from the supporting rod, of the supporting arm is fixedly connected with an obliquely-arranged supporting plate, the end, close to the supporting rod, of the supporting plate is rotationally connected with a mounting plate, and the other end of the supporting plate is connected with a crow plate. The mounting plate is inserted between the tire and the hub, when the distance between the mounting plate and the sleeve is increased, the mounting plate enables the hole diameter of the inner ring of the tire to be increased, then the tire is mounted on the hub, and time and labor are saved. Moreover, the device is simple in structure and convenient to use, does not need additional corollary equipment, and is favorable for being equipped and used by maintenance personnel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tire maintenance equipment technical field, concretely relates to a tire dismounting device. BACKGROUND

[0002] Tire burst is one of common faults of bicycle, electric bicycle and electric tricycle and other short-distance transportation tools, and the damaged tire needs to be dismounted from the hub during maintenance, and the repaired tire or new tire is mounted on the hub, and the process of dismounting and mounting the tire often needs to be assisted by specific tools or equipment, and a variety of solutions for dismounting and mounting the tire of bicycle, electric bicycle or tricycle are proposed in the prior art, for example, the utility model patent with the authorization announcement number CN207657530U discloses a portable tire dismounting device, which comprises a cylinder, a handle and a tire prying rod are fixedly arranged on the cylinder, the tire prying rod is arranged on one side of a power output rod close to the cylinder and is arranged in parallel with the power output rod, an end of the power output rod is provided with a retaining rod, an end of the retaining rod is provided with a clamping groove, an end of the tire prying rod is provided with a first folding plate, the first folding plate is bent away from the retaining rod, an end of the first folding plate is provided with a second folding plate, the second folding plate is bent away from the cylinder, a control box is fixedly arranged on the cylinder, and a control button for controlling the extension and retraction of the power output rod is arranged on the control box.

[0003] The utility model drives the tire prying rod to move through the cylinder, and then pulls the tire through the second folding plate to separate the tire from the hub, which saves time and effort. However, after the tire burst, the electric bicycle is difficult to continue to ride, and people usually choose mobile tire repair service on the spot. The above-mentioned utility model needs compressed gas to drive the operation of the cylinder, which needs to increase additional supporting equipment, not only occupies a large space, but also increases the cost of equipment, which is not conducive to the equipment and use of mobile maintenance personnel. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a tire dismounting device to solve the problems in the above background technology.

[0005] To achieve the above technical purposes, the technical scheme of the utility model is as follows:

[0006] A tire dismounting device, comprising a main arm, a sleeve rotating matched with a hub rotating shaft is vertically fixed on the main arm, a support rod is vertically fixedly connected to one end of the main arm, the axis of the sleeve is parallel to the extension direction of the support rod, a support arm is slidably connected inside the main arm, an inclined support plate is fixedly connected to one end of the support arm away from the support rod, a mounting plate is rotatably connected to one end of the support plate close to the support rod, and a pry plate is connected to the other end of the support plate.

[0007] As a further improvement, the end of the support arm away from the support plate is fixedly connected with a rack, and the main arm is rotatably connected with a gear through a first rotating shaft, and the gear is in meshing cooperation with the rack.

[0008] As a further improvement, the main arm is provided with a rocker, the rocker is rotatably connected with the first rotating shaft, the rocker is rotatably connected with a second rotating shaft, and the rocker is connected with a first clamping piece, one end of the first clamping piece is rotatably connected with the second rotating shaft, and the other end of the first clamping piece is in abutment with the gear teeth.

[0009] As a further improvement, the first rotating shaft is sleeved with a first torsional spring, one end of the first torsional spring is in abutment with the rocker, and the other end of the first torsional spring is in abutment with the surface of the first clamping piece.

[0010] As a further improvement, the main arm is rotatably connected with a third rotating shaft, and the main arm is connected with a second clamping piece, the middle part of the second clamping piece is rotatably connected with the third rotating shaft, one end of the second clamping piece is in abutment with the gear teeth, and the other end of the second clamping piece is in separable contact with the rocker.

[0011] As a further improvement, the third rotating shaft is sleeved with a second torsional spring, one end of the second torsional spring is in abutment with the main arm, and the other end of the second torsional spring is in abutment with the surface of the second clamping piece.

[0012] Due to the adoption of the above technical scheme, the tire dismounting device has the following beneficial effects:

[0013] The tire dismounting device has the advantages that: the installation plate is inserted between the tire and the hub during use, the sleeve is sleeved on the hub shaft, when the distance between the installation plate and the sleeve becomes larger, the installation plate makes the inner ring hole diameter of the tire larger, so that the tire can be easily mounted on the hub, time and labor are saved, and the tire dismounting device has the advantages of simple structure, convenient use, no need of additional matching equipment, and convenience for maintenance personnel to equip and use. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic view of the whole tire dismounting device;

[0015] Figure 2 is a process schematic view of the tire dismounting device;

[0016] Figure 3 is a schematic view of the rocker being counterclockwise rotated;

[0017] Figure 4 is a schematic view of the rocker being clockwise rotated;

[0018] Figure 5 is a structural schematic view of the second clamping piece.

[0019] Wherein: 1-main arm, 2-sleeve, 3-branch, 4-supporting plate, 5-prying plate, 6-mounting plate, 7-supporting rod, 8-rack, 9-rocker, 10-first rotating shaft, 11-gear, 12-second rotating shaft, 13-first clamping piece, 14-first torsional spring, 15-third rotating shaft, 16-second clamping piece, 1601-first end, 1602-second end, 17-second torsional spring, 18-wheel hub, 19-tire. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with specific embodiments and with reference to the drawings. Among them, the drawings are only used for example description, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the present application; in order to better illustrate the embodiments of the utility model, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings can be omitted.

[0021] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" and the like is based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the positional relationship described in the drawings is only used for example description, and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] As Figures 1-5As shown, a tire 19 mounting and dismounting device includes a main arm 1. A sleeve 2, which rotates and engages with the shaft of a wheel hub 18, is vertically fixed on the main arm 1. Specifically, the sleeve 2 is fitted onto the outside of the shaft of the wheel hub 18 to provide force support. In actual use, multiple sleeves 2 with different apertures can be used to accommodate different models of wheel hubs 18. A support rod 7 is vertically fixed to one end of the main arm 1. The axis of the sleeve 2 is parallel to the extension direction of the support rod 7. In use, the support rod 7 is placed on the ground or a workbench, providing force support to the main arm 1. By stepping on the support rod 7, the main arm 1 can rotate around the support rod 7 as a pivot, making operation more flexible. A support arm 3 is slidably connected inside the main arm 1. An inclined support plate 4 is fixedly connected to the end of the support arm 3 away from the support rod 7. A mounting plate 6 is rotatably connected to the end of the support plate 4 near the support rod 7, and a pry plate 5 is connected to the other end of the support plate 4. When removing tire 19, insert pry bar 5 between rim 18 and tire 19, and sleeve 2 onto the rim 18 axle. After tire 19 rotates one revolution, tire 19 can be separated from rim 18. When installing tire 19, insert mounting plate 6 between tire 19 and rim 18, and sleeve 2 onto the rim 18 axle. As the distance between mounting plate 6 and sleeve 2 increases, mounting plate 6 gradually increases the inner diameter of tire 19's bore. Simultaneously, as... Figure 2 As shown, the mounting plate 6 rotates counterclockwise with its contact point with the wheel hub 18 as the fulcrum, prying the inner wall of the tire 19 from the outside of the wheel hub 18 into the inside of the wheel hub 18. After removing the mounting plate 6, the tire 19 is installed in place.

[0023] In this embodiment, a rack 8 is fixedly connected to the end of the support arm 3 away from the support plate 4, and a gear 11 is rotatably connected to the main arm 1 via a first rotating shaft 10. The gear 11 meshes with the rack 8. Figure 3 As shown, when gear 11 rotates counterclockwise, it drives rack 8 to slide to the right, that is, rack 8 slides out from inside main arm 1, making the distance between sleeve 2 and mounting plate 6 larger; when gear 11 rotates clockwise, it drives rack 8 to slide to the left, that is, rack 8 retracts into main arm 1, making the distance between sleeve 2 and mounting plate 6 smaller.

[0024] In this embodiment, the main arm 1 is provided with a rocker arm 9, which is rotatably connected to the first rotating shaft 10. A second rotating shaft 12 is rotatably connected to the rocker arm 9, and a first locking member 13 is connected to the rocker arm 9. One end of the first locking member 13 is rotatably connected to the second rotating shaft 12 and a second locking member 16, while the other end of the first locking member 13 abuts against the teeth of the gear 11. Figure 3 As shown, when the rocker arm 9 rotates counterclockwise, the first locking piece 13 pushes the gear 11 to rotate counterclockwise, and the gear 11 drives the rack 8 to slide outward, thereby increasing the distance between the mounting plate 6 and the sleeve 2.

[0025] In this embodiment, the first torsional spring 14 is sleeved on the first rotating shaft 10, one end of the first torsional spring 14 abuts against the rocker 9, and the other end of the first torsional spring 14 abuts against the surface of the first clamping piece 13. When the rocker 9 is rotated, the first torsional spring 14 can always enable one end of the first clamping piece 13 to contact a gear tooth, and take the gear tooth as a force point to drive the gear 11 to rotate counterclockwise.

[0026] In this embodiment, the third rotating shaft 15 is rotationally connected to the main arm 1, the second clamping piece 16 is connected to the main arm 1, the middle part of the second clamping piece 16 is rotationally connected to the third rotating shaft 15, one end of the second clamping piece 16 abuts against the gear tooth of the gear 11, which is called the first end 1601, and the other end of the second clamping piece 16 is separably contacted with the rocker 9, which is called the second end 1602. Specifically, the length of the second clamping piece 16 from the rotation center to the first end 1601 is greater than the vertical distance from the center of the third rotating shaft 15 to the dedendum circle of the gear 11. As shown in the figure, when the rocker 9 is rotated clockwise, the first clamping piece 13 cannot provide the driving force for the gear 11 to rotate clockwise, the tire 19 applies a leftward force to the rack 8 through the mounting plate 6 and the support arm 3, the rack 8 has a tendency to slide leftward and drive the gear 11 to rotate clockwise, and since the first end 1601 of the second clamping piece 16 is clamped between two gear teeth of the gear 11, the gear 11 can be prevented from rotating clockwise, thereby preventing the rack 8 from returning. At this time, repeatedly rotating the rocker 9 can make the rack 8 and the support arm 3 gradually slide outward, the distance between the mounting plate 6 and the sleeve 2 gradually increases, the hole diameter of the inner ring of the tire 19 gradually increases, and the mounting plate 6 pries the tire 19 from the outer side of the hub 18 to the inner side of the hub 18, and the installation is completed after the mounting plate 6 is removed. Figure 4 In this embodiment, the second torsional spring 17 is sleeved on the third rotating shaft 12, one end of the second torsional spring 17 abuts against the main arm 1, and the other end of the second torsional spring 17 abuts against the surface of the second clamping piece 16. When the tire 19 is installed in place, as shown in the figure, the rocker 9 is rotated clockwise, and when the rocker 9 contacts the second end 1602 of the second clamping piece 16, the second clamping piece 16 is rotated clockwise, and the first end 1601 of the second clamping piece 16 is no longer clamped between the gear teeth, at this time, the rack 8 and the support arm 3 can slide inward, the distance between the mounting plate 6 and the sleeve 2 becomes smaller, and at this time, the mounting plate 6 can be removed from between the hub 18 and the tire 19.

[0027] Figure 4

[0028] ​​This embodiment is primarily designed for the repair of tires 19 on short-distance transportation vehicles with small tire sizes, such as bicycles, electric bicycles, and electric tricycles. It can be used for both tire removal and installation. To remove the tire 19, insert the pry bar 5 between the tire 19 and the rim 18, rotate the tire 19 one full turn, and the tire 19 will separate from the rim 18. To install the tire 19, first manually install most of the inner ring of the tire 19 into place. Insert the mounting plate 6 between the rim 18 and the part of the tire 19 that is not yet installed. Place the sleeve 2 on the rim 18's axle. Figure 3 As shown, when the rocker arm 9 is rotated counterclockwise, the first locking piece 13 pushes the gear 11 to rotate counterclockwise. The gear 11 drives the rack 8 to slide to the right, increasing the distance between the mounting plate 6 and the sleeve 2, and enlarging the bore of the uninstalled part of the inner ring of the tire 19. At this time, the tire 19 can be easily installed onto the wheel hub 18. After the tire 19 is installed, the rocker arm 9 is rotated clockwise, causing the rocker arm 9 to contact the second end 1602 of the second locking piece 16, and causing the second locking piece 16 to rotate clockwise. The first end 1601 of the second locking piece 16 no longer obstructs the rotation of the gear 11. At this time, the rack 8 can slide smoothly to the left, and the distance between the mounting plate 6 and the sleeve 2 decreases. After the mounting plate 6 is removed, the next maintenance work can be carried out.

[0029] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A tire changing apparatus comprising a main arm, characterized in that, The main arm is vertically fixed with a sleeve matched with the wheel hub rotating shaft, one end of the main arm is vertically fixedly connected with a supporting rod, the axis of the sleeve is parallel to the extending direction of the supporting rod, the main arm is slidably connected with a branch arm, one end of the branch arm away from the supporting rod is fixedly connected with an obliquely arranged supporting plate, one end of the supporting plate close to the supporting rod is rotatably connected with a mounting plate, the other end of the supporting plate is connected with a prying plate.

2. A tyre changing apparatus according to claim 1, wherein One end of the branch arm away from the supporting plate is fixedly connected with a rack, the main arm is rotatably connected with a gear through a first rotating shaft, the gear is engaged with the rack.

3. A tyre changing apparatus according to claim 2, wherein The main arm is provided with a rocker, the rocker is rotatably connected with the first rotating shaft, the rocker is rotatably connected with a second rotating shaft, the rocker is connected with a first clamping piece, one end of the first clamping piece is rotatably connected with the second rotating shaft, the other end of the first clamping piece is abutted with the gear teeth.

4. A tyre changing apparatus according to claim 3, wherein The first rotating shaft is sleeved with a first torsion spring, one end of the first torsion spring is abutted with the rocker, the other end of the first torsion spring is abutted with the surface of the first clamping piece.

5. A tyre changing apparatus according to claim 3, wherein The main arm is rotatably connected with a third rotating shaft, the main arm is connected with a second clamping piece, the middle part of the second clamping piece is rotatably connected with the third rotating shaft, one end of the second clamping piece is abutted with the gear teeth, the other end of the second clamping piece is separably contacted with the rocker.

6. A tyre changing apparatus according to claim 5, wherein The third rotating shaft is sleeved with a second torsion spring, one end of the second torsion spring is abutted with the main arm, the other end of the second torsion spring is abutted with the surface of the second clamping piece.

Images