Self-positioning locking dismounting machine double-pressing tire arm

Abstract

The application discloses a self-positioning and locking dismounting machine double-pressing tire arm which comprises a pressing block movable arm, a pressing wheel movable arm which is relatively rotatably connected with the pressing block movable arm, a main horizontal rod which is provided with a moving positioning pin guide hole at one end, and a self-positioning and locking part, wherein the self-positioning and locking part comprises a positioning disc, a locking disc, a positioning shaft and a moving positioning pin; the positioning disc is fixedly connected with the pressing block movable arm; the lower part of the positioning disc is a flange-shaped disc; one part of the upper surface of the flange-shaped disc is a horizontal section, and the other part is a convex part which is higher than the horizontal section; the top of the convex part is connected with the horizontal section through an inclined surface at two sides; the locking disc is fixedly connected with the pressing wheel movable arm; the upper part of the locking disc is a flange-shaped disc and is provided with a locking pin hole; the positioning disc and the locking disc are rotatably connected with two ends of the positioning shaft respectively; the middle part of the positioning shaft is fixedly connected with the main horizontal rod; and the moving positioning pin is provided with a moving pin groove which can be embedded into the flange-shaped disc of the positioning disc. The positioning disc can drive the moving positioning pin to move up and down when the positioning disc rotates.

Description

Technical Field

[0001] This invention relates to a tire pressure arm for a tire changer, and more particularly to a double tire pressure arm for a tire changer that can be automatically positioned and locked. Background Technology

[0002] Tire changers, also known as tire changers, are indispensable equipment for removing and installing tires during the repair of various automobiles, wheeled tractors, and motorcycles. The tire clamping arm is the main component of the tire changer, used to mount the tire onto the rim. The tire clamping arm can also be used when removing tires.

[0003] Early tire changers, and even some still in use today, employed a single-arm pressing arm. This type of arm was vertically mounted above the tire to be processed, locked onto the machine's control panel. As the tire rotated, the pressing component below the arm pressed down on the tire bead, forcing it in. It was characterized by its simple structure and ease of operation. However, with this single-arm pressing arm, the operator needed to insert a pry bar between the rim and the tire bead on the side opposite the pressing component to press the tire in. This method required operator assistance and often resulted in damage to the tire bead or rim during tire loading and unloading.

[0004] Chinese utility model patent ZL2018213356643 discloses a tire changer with a dual-pressure arm structure. This tire changer includes a pressure arm and a pressure block located below the pressure arm; it also includes a rotating pressure arm independent of the pressure arm, with a plastic slider. This dual-pressure arm structure can protect the tire from damage to the tire and rim during installation to a certain extent. However, because the dual pressure arms need to move continuously during operation, the two pressure arms need to maintain a certain distance for a period at the beginning of tire installation to prevent the tire bead already installed in the rim from popping out. This type of tire changer designs the relative position between the two pressure arms as a fixed structure, making it impossible to accurately control the distance between the pressure block and the plastic slider during the pressure process, resulting in time-consuming and labor-intensive operation. To solve these problems, some dual-pressure arm tire changers use hydraulic or pneumatic devices to limit the relative position of the two pressure arms during movement; however, these devices are complex in structure and expensive. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a tire changer with a double tire pressure arm that can automatically position and lock the position between the two tire pressure arms during the tire pressure process, has a simple structure, is easy to operate, and has high tire loading efficiency.

[0006] The technical solution of the self-positioning and locking double pressure arm of the tire changer of the present invention includes a pressure block movable arm and a pressure roller movable arm rotatably connected to the pressure block movable arm, and a main crossbar with a guide hole for a movable positioning pin at one end. It also includes a self-positioning and locking component, which includes a positioning plate, a locking plate, a positioning shaft, and a movable positioning pin, wherein:

[0007] The positioning plate is fixedly connected to the movable arm of the pressure block. The lower part of the positioning plate is a flange-shaped disc. Part of the upper surface of the flange-shaped disc is a horizontal section, and the other part is a protrusion that is higher than the horizontal section. The top two sides of the protrusion are connected to the horizontal section by an inclined surface.

[0008] The locking disc is fixedly connected to the movable arm of the pressure roller. The upper part of the locking disc is a flange-shaped disc with a locking pin hole.

[0009] The two ends of the positioning shaft are rotatably connected to the positioning plate and the locking plate, respectively, and the middle part of the positioning shaft is fixedly connected to the main crossbar.

[0010] The upper end of the movable positioning pin is provided with a movable pin groove for a flange-shaped disc into which the positioning plate can be inserted. When the positioning plate rotates, its horizontal section and protrusion alternately insert into the movable pin groove of the movable positioning pin, so that the movable positioning pin moves up and down in the positioning pin guide hole of the main crossbar and inserts into or leaves the locking pin hole of the locking plate.

[0011] A preferred embodiment of the self-positioning locking tire changer double pressure arm of the present invention is that a positioning pin spring is provided on the outer periphery of the movable positioning pin in the guide hole of the movable positioning pin.

[0012] Furthermore, the angle α between the inclined surface of the positioning plate and the horizontal section is 15°-30°.

[0013] Furthermore, the length of the outer circumference of the upper surface of the protrusion from point A to point B is 10mm-20mm, and the distance from the upper surface of the protrusion to the horizontal section is 10mm-15mm.

[0014] Furthermore, the angle β between the pressing block axis of the pressing block movable arm and the symmetrical line of the protrusion of the protrusion is 1°-20°.

[0015] Furthermore, the angle γ between the inclined plane and the first or second intersection line of the horizontal segment is 110°-130°.

[0016] In a preferred embodiment of the self-positioning and locking tire changer double pressure arm of the present invention, the included angle δ between the pressure roller axis of the pressure roller movable arm and the locking pin hole axis is 60°-80°.

[0017] A preferred embodiment of the self-positioning and locking tire changer double pressure arm of the present invention further includes a pressure block upright with a pressure block at one end and a pressure block guide groove at the other end. The pressure block movable arm moves in the pressure block guide groove and is controlled by a guide wheel.

[0018] A preferred embodiment of the self-positioning and locking tire changer double pressure arm of the present invention further includes a pressure roller bent bar with a pressure roller at one end and a pressure roller guide groove at the other end. The pressure roller movable arm moves in the pressure roller guide groove and is controlled by a second guide roller.

[0019] A preferred embodiment of the self-positioning and locking tire changer double pressure arm of the present invention further includes a main crossbar connecting frame disposed at the rear end of the main crossbar and a movable arm sliding sleeve connected to the main crossbar connecting frame and perpendicular to the main crossbar.

[0020] Compared with the prior art, the tire-pressing arm of the tire-changing machine of the present invention has the following beneficial effects: It consists of a double-arm structure comprising a pressing block movable arm, a pressing roller movable arm, and a self-positioning locking component. When the positioning disc is inserted into the movable pin groove and rotates, it drives the movable positioning pin to move up and down. When the tire-pressing arm starts working, the pressing block movable arm and the pressing roller movable arm are located close to each other on one side of the main crossbar. At this time, the lower end of the movable positioning pin is inserted into the locking pin hole of the locking disc, locking the locking pin hole and the pressing roller movable arm. The pressing block of the pressing block movable arm continuously presses the rotating tire lip into the rim, while the rear pressing roller maintains a certain distance to press the lip to prevent it from popping out. After the pressing block movable arm rotates through a certain angle, the protrusion of the positioning disc is inserted into the movable pin groove, causing the movable positioning pin to be pulled out of the locking pin hole. The pressing roller movable arm then begins to move with the pressing block movable arm until the pressing block movable arm approaches the other side of the main crossbar, completing the tire-changing operation.

[0021] This dual-pressure arm structure ensures the free movement of the pressure arms and keeps the tire bead portion that has been pressed into the rim stable and prevents it from popping out, thus avoiding damage to the tire bead and rim. The structure is simple and reliable, eliminating the need for pneumatic or hydraulic devices to control and fix the two pressure arms, as well as complex control circuitry or software, which can significantly improve work efficiency and reduce production costs. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 This is a schematic diagram of the overall structure of the dual-pressure tire arm of a tire changer in one embodiment;

[0024] Figure 2 yes Figure 1 A schematic diagram of the explosion of the double-pressure tire arm of a tire changer;

[0025] Figure 3This is a schematic diagram of the cross-section of the self-positioning locking component (with the movable positioning pin pulled out);

[0026] Figure 4 This is a schematic diagram of the fixed connection structure between the positioning plate and the pressure block crossbar;

[0027] Figure 5 yes Figure 4 A bottom view of the positioning plate and pressure block crossbar structure;

[0028] Figure 6 yes Figure 4 Right view of the positioning disc structure;

[0029] Figure 7 This is a schematic diagram of the fixed connection structure between the locking disc and the pressure roller crossbar;

[0030] Figure 8 This is a diagram showing the positions of the two arms at the start of tire loading;

[0031] Figure 9 This is a cross-sectional view of the movable positioning pin inserted into the locking pin hole;

[0032] Figure 10 Schematic diagram of the relative positions of the two arms when the movable positioning pin is locked;

[0033] Figure 11 This is a diagram showing the relative positions of the two arms when the tire mounting is complete.

[0034] The labels in the diagram represent: 1-Self-positioning locking component, 11-Positioning disc, 111-Protrusion, 112-Horizontal section, 114-Inclined surface, 115-Protrusion symmetry line, 116-First intersection line, 117-Second intersection line, 12-Positioning shaft, 13-Locking disc, 131-Locking pin hole, 132-Locking pin hole axis, 2-Pressure block movable arm, 21-Pressure block crossbar. 22-Pressure block upright, 23-Pressure block, 24-Guide wheel one, 25-Pressure tire quick fixing screw, 26-Pressure block axis, 27-Pressure block guide groove, 3-Pressure wheel movable arm, 31-Pressure wheel crossbar, 32-Pressure wheel bent bar, 33-Pressure wheel, 34-Guide wheel two, 36-Pressure wheel axis, 4-Main crossbar, 41-Moving positioning pin guide hole, 42-Main crossbar connecting frame, 43-Moving arm sliding sleeve, 44-Main crossbar axis, 5-Moving positioning pin, 51-Moving pin groove, 52-Locking pin lower cover, 53-Protruding ring, 6-Positioning pin spring, 7-Locking disc cover, 8-Positioning disc cover. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] Please see Figure 1-2 As shown, a self-positioning and locking tire changer with a double pressure arm according to one embodiment of the present invention includes a pressure block movable arm 2, which can be installed in a pressure block guide groove 27, and the two can be slidably connected relative to each other. A pressure block upright bar 22 is provided below the pressure block guide groove, and a pressure block 23 is provided at one bottom end of the pressure block upright bar 22. The pressure block upright bar 22 and the pressure block 23 are fixed by a fixing screw 25 in the tire pressure block. A guide wheel 24 is provided on one side of the pressure block guide groove 27 to control the movement of the pressure block movable arm 2 and the pressure block guide groove 27. A pressure roller movable arm 3 and a pressure block movable arm 2 are rotatably connected relative to each other through a self-positioning and locking component 1. The pressure roller movable arm 3 can be installed in a pressure roller guide groove 37, and a pressure roller bent bar 32 is provided below the pressure roller guide groove 37. A pressure roller 33 is provided at one bottom end of the pressure roller bent bar 32. A guide wheel 34 is provided on one side of the pressure roller guide groove 37 to control the movement of the pressure roller movable arm 3 and the pressure roller guide groove 37. The pressure block 23 of the pressure block movable arm 2 will continuously press the rotating tire lip into the rim, while the pressure wheel 33 of the rear pressure wheel movable arm 3 will keep a certain distance from the pressure block movable arm to press the lip to prevent the lip from popping out.

[0037] Please see Figure 3-7As shown, in this embodiment, the self-positioning locking component 1 includes a positioning disk 11, which is fixedly connected to the pressure block movable arm 2. The center of the positioning disk is a shaft hole, and the positioning disk is rotatably connected to the upper part of the positioning shaft 12 through the shaft hole. The lower part of the positioning disk is a flange-shaped disc. Part of the upper surface of the flange-shaped disc of the positioning disk is a horizontal section 112, and another part is a protrusion 11 higher than the horizontal section. The outer circumference of the upper surface of the protrusion is 10mm-20mm from point A to point B, and the distance from the upper surface of the protrusion to the horizontal section is 10mm-15mm. The top surface plane of the protrusion, determined by this length, can ensure stable contact between the protrusion and the movable pin groove of the movable positioning pin. The angle β between the pressure block axis 26 of the pressure block movable arm 2 and the protrusion symmetry line 115 of the protrusion 11 is 1°-20°. This angle is to ensure that one side of the pressure block movable arm and the pressure roller movable arm can be as close as possible to the main crossbar. The top sides of the protrusion 11 transition to the horizontal section 112 via inclined surfaces 114. The angle α between the inclined surface of the positioning plate and the horizontal section is 15°-30°. A certain degree of inclination of the inclined surface prevents the moving pin groove from getting stuck or jammed when moving on the flange-shaped disc of the positioning plate, ensuring smooth relative rotation between the flange-shaped disc and the moving pin groove. The intersection of the inclined surface 114 on one side of the protrusion and the horizontal section 112 is the first intersection line 116, and the intersection of the inclined surface 114 on the other side of the protrusion and the horizontal section 112 is the second intersection line 117. The angle γ between the first and second intersection lines is 110°-130°. Angle γ ensures that after the pressure block movable arm rotates 110°-130° from its starting position, the moving pin groove moves from contact with the horizontal section to contact with the protrusion, releasing the locking pin of the locking disc's locking pin hole 131, and the pressure roller movable arm begins to rotate.

[0038] The locking disc 13 is fixedly connected to the pressure roller movable arm. The upper part of the locking disc is a flange-shaped disc with a locking pin hole 131. The angle δ between the pressure roller axis 36 of the pressure roller movable arm 3 and the locking pin hole axis 132 is 60°-80°. The angle δ can ensure the angle between the pressure block movable arm and the pressure roller movable arm at the beginning of tire loading. One end of the main crossbar 4 is provided with a movable positioning pin guide hole 41. The movable positioning pin guide hole 41 can be directly manufactured in the main crossbar, or a pin sleeve structure can be used. The upper end is made into a hole diameter that allows the upper part of the movable positioning pin 5 to slide freely up and down. The inside is made into a diameter that matches the convex ring 53 and can be installed at the bottom of the movable positioning pin guide hole. A positioning pin spring 6 is provided on the outer periphery of the moving positioning pin 5 inside the guide hole 41 of the moving positioning pin. A convex ring 53 is provided at the lower part of the moving positioning pin to limit the position of the positioning pin spring. A locking pin cover 52 is provided on the bottom surface of the locking pin hole. When the protrusion of the locking plate pulls the moving positioning pin upward, the positioning pin spring applies a downward force to the moving positioning pin through the convex ring on it, which can ensure that the moving positioning pin can smoothly fall into the locking pin hole in the next step.

[0039] In this embodiment, the diameters at both ends of the positioning shaft 12 can be smaller than the diameter of the middle part. The upper and lower ends of the positioning shaft are rotatably connected to the positioning plate and the locking plate, respectively, and the middle part of the positioning shaft is fixedly connected to the main crossbar 4.

[0040] In this embodiment, the upper end of the movable positioning pin 5 is provided with a movable pin groove 51. The flange-shaped disc of the positioning plate can be relatively movably embedded into the movable pin groove 51. When the positioning plate rotates, its horizontal section and protrusion alternately embed into the movable pin groove of the movable positioning pin, causing the movable positioning pin to move up and down in the positioning pin guide hole of the main crossbar, inserting into or leaving the locking pin hole 131 of the locking plate. A positioning plate cover 52 is provided on the upper part of the positioning plate, and a locking plate pressure cover 7 is provided on the lower part of the locking plate. This double-pressure tire arm structure can keep the tire bead portion that has been pressed into the rim stable and prevent it from popping out, and can also avoid damage to the tire bead and the rim. The structure is simple and reliable, and it does not require pneumatic or hydraulic devices to control and fix the two tire arms, nor does it require complex control circuit devices or control software, which can greatly improve work efficiency and reduce production costs.

[0041] Please see Figure 8-11 As shown, the self-positioning and locking double-pressure tire arm of the tire changer of this invention is installed on the tire changer. When the tire loading work begins, the first step is as follows: Figure 8 As shown, the pressure roller movable arm is manually moved to one side of the main crossbar, with the pressure roller axis 36 and the main crossbar axis 44 forming an angle of approximately 70°-75°. At this time, the horizontal section of the locking plate is located in the movable pin groove, and the lower end of the movable positioning pin is inserted into the locking pin hole of the locking plate to lock and fix the pressure roller movable arm. Figure 3 With the lower end of the movable positioning pin inserted into the locking pin hole, the pressure roller movable arm cannot move. Push the pressure block movable arm towards the pressure roller movable arm so that the two are close to each other, with the pressure block axis 26 and the main crossbar axis 44 forming an angle of approximately 90°-110°; the second part is as follows. Figure 9-10 As shown, starting the machine causes the tire to rotate clockwise. The pressure wheel movable arm remains fixed in its initial position, with the 70°-75° angle between it and the main crossbar axis remaining constant. The pressure block below the pressure block movable arm presses down on the moving tire lip, inserting it into the rim. The pressure wheel below the pressure wheel movable arm remains stationary in its initial position, pressing down on the lip to prevent the already pressed-in tire lip from popping out. When the pressure block axis 26 of the pressure block movable arm reaches an angle of 185°-195° with the main crossbar axis 44, the protrusion of the positioning plate engages with the moving pin groove, causing the moving positioning pin to pull out of the locking pin hole and release the lock on the pressure wheel movable arm. Figure 10 (This refers to the state after the lower end of the movable positioning pin is pulled out of the locking pin hole). The pressure roller movable arm begins to move gradually closer to the pressure block movable arm as the tire rotates. The third step is as follows: Figure 11 As shown, the pressure block movable arm is close to the other side of the main crossbar, and the pressure wheel movable arm and the pressure block movable arm are close to each other, and the tire removal work is completed.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-positioning and locking double pressure arm for a disassembly and assembly machine, comprising a pressure block movable arm (2) and a pressure roller movable arm (3) rotatably connected to the pressure block movable arm, and a main crossbar (4) having a movable positioning pin guide hole (41) at one end, characterized in that, It also includes a self-positioning locking component (1), which includes a positioning disc (11), a locking disc (13), a positioning shaft (12), and a movable positioning pin (5), wherein: The positioning plate (11) is fixedly connected to the movable arm (2) of the pressure block. The lower part of the positioning plate is a flange-shaped disc. A part of the upper surface of the flange-shaped disc is a horizontal section (112), and the other part is a protrusion (111) higher than the horizontal section. The top sides of the protrusion (111) and the horizontal section (112) are connected by an inclined surface (114). The locking disc (13) is fixedly connected to the movable arm of the pressure roller. The upper part of the locking disc is a flange-shaped disc with a locking pin hole (131). The two ends of the positioning shaft (12) are rotatably connected to the positioning plate and the locking plate respectively, and the middle part of the positioning shaft is fixedly connected to the main crossbar (4); The upper end of the movable positioning pin (5) is provided with a movable pin groove (51) that can be embedded in the positioning disk. When the positioning disk rotates, its horizontal section The protrusion and the movable pin groove of the movable positioning pin are successively embedded in the movable positioning pin, so that the movable positioning pin moves up and down in the positioning pin guide hole of the main crossbar to insert or leave the locking pin hole (131) of the locking plate. The length of the outer circumference of the upper surface of the protrusion from point A to point B is 10mm-20mm, and the distance from the upper surface of the protrusion to the surface of the horizontal section is 10mm-15mm. When the tire loading work begins, the first step is to manually move the pressure wheel movable arm (3) to one side of the main crossbar (4), with the pressure wheel axis (36) and the main crossbar axis (44) forming an angle of 70°-75°. At this time, the horizontal section (112) of the locking disc (13) is located in the moving pin groove (51), and the lower end of the moving positioning pin (5) is inserted into the locking pin hole (131) of the locking disc (13), locking the pressure wheel movable arm (3) in place, and the pressure wheel movable arm (3) cannot move. The pressure block movable arm (2) is pushed towards the pressure wheel movable arm (3) to bring them closer together, with the pressure block axis (26) and the main crossbar axis (44) forming an angle of 90°-110°. The second step is to start the machine to rotate the tire clockwise, and the pressure wheel movable arm (3) is fixed in the initial position, maintaining the 70°-75° angle with the main crossbar axis (44). Without changing, the pressure block under the pressure block movable arm (2) presses down on the moving tire lip and puts it into the rim. The pressure wheel (33) under the pressure wheel movable arm (3) remains stationary at the starting position and presses down on the lip to prevent the already pressed tire lip from popping out. When the pressure block axis (26) of the pressure block movable arm (2) and the main crossbar axis (44) reach an angle of 185°-195°, the protrusion (111) of the positioning plate (11) is embedded in the moving pin groove (51), so that the moving positioning pin (5) is pulled out of the locking pin hole (131) and the locking of the pressure wheel movable arm (3) is released. The pressure wheel movable arm (3) begins to move closer to the pressure block movable arm (2) with the movement of the rotating tire. In the third step, the pressure block movable arm (2) moves closer to the other side of the main crossbar (4), and the pressure wheel movable arm (3) and the pressure block movable arm (2) move closer to each other, and the tire loading work is completed.

2. The self-positioning and locking double-pressure tire arm of the disassembly and assembly machine according to claim 1, characterized in that, A positioning pin spring (6) is provided on the outer periphery of the moving positioning pin (5) inside the moving positioning pin guide hole (41).

3. The self-positioning and locking double-pressure tire arm of the disassembly and assembly machine according to claim 2, characterized in that, The angle α between the inclined surface of the positioning plate and the horizontal section is 15°-30°.

4. The self-positioning and locking double-pressure tire arm of the disassembly and assembly machine according to claim 3, characterized in that, The angle β between the pressing axis (26) of the pressing arm (2) and the protrusion symmetry line (115) of the protrusion (111) is 1°-20°.

5. The self-positioning and locking double-pressure tire arm of the disassembly and assembly machine according to claim 4, characterized in that, The angle γ between the inclined surface (114) and the first intersection line (116) or the second intersection line (117) of the horizontal segment (112) is 110°-130°.

6. The self-positioning and locking double-pressure tire arm of the disassembly and assembly machine according to claim 1, characterized in that, The angle δ between the pressure roller axis (36) of the pressure roller movable arm (3) and the locking pin hole axis (132) is 60°-80°.

7. The self-positioning and locking double-pressure tire arm of the disassembly and assembly machine according to claim 1, characterized in that, It also includes a pressure block upright (22) with a pressure block (23) at one end and a pressure block guide groove (27) at the other end. The pressure block movable arm (2) moves in the pressure block guide groove (27) and is controlled by a guide wheel (24).

8. The self-positioning and locking double-pressure tire arm of the disassembly and assembly machine according to claim 1, characterized in that, It also includes a pressure wheel bend (32) with a pressure wheel (33) at one end and a pressure wheel guide groove (37) at the other end. The pressure wheel movable arm (3) moves in the pressure wheel guide groove (37) and is controlled by the second guide wheel (34).

9. The self-positioning and locking double-pressure tire arm of the disassembly and assembly machine according to claim 1, characterized in that, It also includes a main crossbar connecting frame (42) located at the rear end of the main crossbar and a movable arm sliding sleeve (43) connected to the main crossbar connecting frame and perpendicular to the main crossbar.

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