Retaining ring press-fitting equipment for assembling tire

Abstract

The invention relates to the technical field of tire assembling, in particular to check ring press-fitting equipment for assembling a tire. The tire press-fitting device comprises a base plate, a clamping mechanism and a press-fitting mechanism, wherein the clamping mechanism and the press-fitting mechanism are arranged on the base plate, and the clamping mechanism is used for clamping and fixing a tire; the press-fitting mechanism is used for press-fitting the check ring to the rim. One side of the base plate is connected with a mechanical arm, and the mechanical arm is used for driving the base plate to move in multiple directions, so that the base plate at least has a first movement direction and a second movement direction; according to the check ring press-fitting equipment for assembling the tire, the base plate is driven by the mechanical arm to move in multiple directions, so that the position of a check ring is changed in the moving process, the check ring is guided in combination with the limiting plate, the check ring enters the guide groove in the moving process, and centering treatment of the check ring is achieved. In the centering process, the check ring is completely separated from the tire, so that the problem that the contact area with the check ring is too small is solved, and the press-fitting efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tire assembly, and more specifically, to a snap ring pressing device for tire assembly. Background Art

[0002] Large trucks, forklifts and other vehicles usually use flat-bottomed rims. During the installation process of the flat-bottomed rim and the tire, a snap ring needs to be installed on the rim. First, the tire is put on the rim, and then the annular snap ring is put on and pushed inward until it crosses the annular groove on the rim, and then the open elastic lock ring is inserted into the annular groove.

[0003] Currently, when installing the snap ring, it is necessary to manually place the snap ring on the rim and then center and limit the rim to press down the snap ring. In the actual pressing process, the accuracy of the snap ring placed manually is difficult to guarantee, and the rim is prone to move and misalign with the snap ring during the movement, thus affecting the pressing effect of the snap ring and reducing the fit between the snap ring and the rim.

[0004] To solve this problem, in the related art, a push rod (centering mechanism) is arranged on the outer ring of the tire to push the snap ring to the centered position. However, since the inner ring of the tire is usually concave inward and the outer ring is usually convex outward, that is, when the tire is placed horizontally, the height of the tire sidewall is higher than the height of the inner ring. When the snap ring is placed on the inner ring of the tire, the height of the snap ring protruding from the tire is small, resulting in a small contact area between the push rod and the snap ring, thus affecting the stability of centering the snap ring and further affecting the pressing efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a snap ring pressing device for tire assembly, which changes the centering method of the snap ring to make the snap ring in a moving state, and guides the moving snap ring to limit it to the centered position, so as to solve the problem proposed in the above background art, that is, the contact area between the push rod and the snap ring is small, thus affecting the stability of centering the snap ring and further affecting the pressing efficiency.

[0006] To achieve the above purpose, a snap ring pressing device for tire assembly is provided, including a substrate and a clamping mechanism and a pressing mechanism arranged on the substrate. The clamping mechanism is used for clamping and fixing the tire; the pressing mechanism is used for pressing the snap ring onto the rim. A robotic arm is connected to one side of the substrate, and the robotic arm is used to drive the substrate to move in multiple directions, so that the substrate has at least a first movement direction and a second movement direction. It also includes a guiding groove and a limiting plate arranged at the bottom of the substrate, wherein the limiting plate is arranged corresponding to the first movement direction. In the first movement direction, the retaining ring moves towards the limiting plate, causing the limiting plate to guide the retaining ring towards the guiding groove; in the second movement direction, the retaining ring enters the guiding groove, and the guiding groove restricts the retaining ring to be coaxial with the rim.

[0007] In the above technical solution, since the limiting method of the retaining ring is changed, in this way, by guiding the movement of the retaining ring, the retaining ring is separated from the tire surface and enters the guiding groove to be centered. In this way, even if the tire bulges outwards, since the guiding is not carried out on the tire surface, there is no phenomenon of unstable contact with the retaining ring.

[0008] On this basis, one end of the guiding groove is the limiting end, and the other end extends towards the end of the substrate. The limiting plate is connected to the bottom of the substrate and is located at one end of the guiding groove away from the limiting end; the bottom end of the limiting plate extends to the surface of the tire and is used to limit the retaining ring affected by the first movement direction. In this way, the retaining ring will be blocked by the limiting plate during the movement process, and then enter the guiding groove under the guidance of the limiting plate to achieve the purpose of centering.

[0009] In another technical solution, a retaining rod extending towards the rim is fixedly provided at the bottom end of the clamping member. When the clamping member clamps and fixes the tire, one end of the retaining rod is at the bottom of the rim and is used to limit the rim.

[0010] The height of the retaining rod near the clamping mechanism is higher than that of the other end, and an inclined surface is provided between the two ends for transition to squeeze the rim upwards by using the inclined surface.

[0011] In this technical solution, through the limitation of the retaining rod, the rim will not move during the press-fitting process, so there is no need to place the rim on the ground or the workbench before press-fitting. In addition, the inclined surface on the retaining rod will also make the top of the rim protrude above the top of the tire, thereby avoiding the upward resistance exerted by the tire on the retaining ring.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the retaining ring press-fitting device for assembling a tire, a robotic arm is used to drive the substrate to perform multi-directional movements, thereby changing the position of the retaining ring during the movement process, and combining with the limiting plate to guide the retaining ring, so that the retaining ring enters the guiding groove during the movement process, thereby realizing the centering process of the retaining ring. During the centering process, the retaining ring is completely separated from the tire, thereby solving the problem of too small contact area with the retaining ring and improving the press-fitting efficiency.

[0013] 2. In the retaining ring press-fitting device for assembling a tire, the limiting plate can not only guide the retaining ring during the flipping process, but also prevent the tire from deforming upwards during the press-fitting process, so that the rim can protrude above the tire, reducing the upward resistance exerted by the tire on the retaining ring during the press-fitting process. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the structure of the limit plate of the present invention; Figure 3 is a schematic diagram of the structure of the clamping member of the present invention; Figure 4 is a schematic diagram of the structure of the clamping mechanism of the present invention; Figure 5 is a schematic diagram of the structure of the press-fitting mechanism of the present invention; Figure 6 is a schematic diagram of the structure of the guiding groove of the present invention; Figure 7 is a schematic diagram of the operating state of the substrate of the present invention Figure 1 ; Figure 8 is a schematic diagram of the operating state of the substrate of the present invention Figure 2 ; Figure 9 is a schematic diagram of the structure of the second cylinder of the present invention; Figure 10 is a schematic diagram of the height state of the rim of the present invention.

[0015] The meanings of the various reference numerals in the figure are as follows: 100, robotic arm; 101, substrate; 110, clamping mechanism; 111, clamping member; 112, stop bar; 113, rotating plate; 114, first slideway; 115, second slideway; 116, first cylinder; 117, inclined surface; 120, press-fitting mechanism; 121, pressing ring; 122, through groove; 123, hydraulic cylinder; 130, guiding groove; 131, limiting end; 140, limit plate; 141, second cylinder; 200, tire; 201, rim; 202, retaining ring. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0017] Currently, in view of the problem that the contact area between some centering mechanisms and the retaining ring 202 is too small during the process of pushing the retaining ring 202, the present invention provides a retaining ring press-fitting device for assembling tires, as Figure 1As shown, it includes a robotic arm 100 and a substrate 101. The substrate 101 is connected to the end effector of the robotic arm 100. In this way, the robotic arm 100 can drive the substrate 101 to move in multiple directions, so that the substrate 101 has at least a first movement direction and a second movement direction, and the mechanisms (clamping mechanism 110, press-fitting mechanism 120, guiding groove 130, and limiting plate 140) provided on the robotic arm 100 can move synchronously. As Figure 2 shown, a clamping mechanism 110 and a press-fitting mechanism 120 are provided on the substrate 101. Among them, the clamping mechanism 110 is used to clamp and fix the tire 200; the press-fitting mechanism 120 is used to press-fit the retaining ring 202 onto the rim 201; in addition, the press-fitting device further includes a guiding groove 130 and a limiting plate 140 provided at the bottom of the substrate 101; the limiting plate 140 is arranged corresponding to the first movement direction. In the first movement direction, the retaining ring 202 moves towards the limiting plate 140, and the limiting plate 140 guides the retaining ring 202 towards the guiding groove 130; in the second movement direction, the retaining ring 202 enters the guiding groove 130, and the guiding groove 130 restricts the retaining ring 202 to be coaxial with the rim 201.

[0018] Figure 3 The specific structure of the clamping mechanism 110 is shown. As shown in the figure, a plurality of clamping members 111 are arranged on the bottom of the substrate 101 in a circular array. The plurality of clamping members 111 are all connected to a driving member, and the driving member drives the plurality of clamping members 111 to approach each other to clamp and fix the tire 200. As a specific example, the clamping member 111 is in the shape of a Figure 3 cylindrical shape as shown.

[0019] During specific implementation, as Figure 4As shown in the figure, a first slideway 114 is provided through the surface of the substrate 101. The top end of the clamping member 111 passes through the first slideway 114 and is slidably connected to the first slideway 114, and the sliding connection direction is the horizontal direction. At this time, a first air cylinder 116 can be provided at the top end of each clamping member 111, and the corresponding clamping member 111 is driven to move through the first air cylinder 116, so that a plurality of clamping members 111 approach each other to clamp the tire 200. Moreover, in this embodiment, a rotating plate 113 is additionally provided to realize the synchronous driving of a plurality of clamping members 111. Specifically, the rotating plate 113 is rotatably arranged on the outer ring of the convex ring at the top of the substrate 101. A second slideway 115 is provided through the part of the rotating plate 113 corresponding to the first slideway 114. The top end of the clamping member 111 passes through the first slideway 114 and then penetrates into the second slideway 115. In this way, only one first air cylinder 116 needs to be provided. One end of the first air cylinder 116 is rotatably connected to the top of the substrate 101, and the other end is rotatably connected to the top of the rotating plate 113. In this way, when the first air cylinder 116 drives the rotating plate 113 to rotate, the rotating plate 113 can drive a plurality of clamping members 111 to move simultaneously through the limitation of the second slideway 115 and the first slideway 114.

[0020] It can be seen that when the clamping member 111 clamps and fixes the tire 200, when the robotic arm 100 drives the substrate 101 to perform multi-directional movement at this time, the substrate 101 will also drive the tire 200 to perform multi-directional movement through the clamping member 111. In this way, when the tire 200 is inclined along the first movement direction, the retaining ring 202 on the surface of the tire 200 will begin to slide down to the limiting plate 140 under the action of gravity.

[0021] In the above, the guiding groove 130 and the limiting plate 140 are both arranged at the bottom of the substrate 101. Among them: Both ends of the guiding groove 130 are circular arc-shaped, and the arc is the same as the arc of the outer circle of the retaining ring 202. At the same time, one end of the guiding groove 130 is a limiting end 131, and its orientation corresponds to the second movement direction. The other end extends towards the end of the substrate 101, and its orientation corresponds to the first movement direction. The position of the limiting end 131 corresponds to the position of the tire 200 after being clamped and fixed, that is, when the outer circle of the retaining ring 202 contacts the limiting end 131, the retaining ring 202 is coaxial with the rim 201; The limiting plate 140 is connected to the bottom of the substrate 101 and is located at one end of the guiding groove 130 away from the limiting end 131. The bottom end of the limiting plate 140 extends to the surface of the tire 200, so as to block the sliding retaining ring 202, so that the limiting plate 140 limits the retaining ring 202 affected by the first movement direction, and guides the retaining ring 202 into the guiding groove 130 under the action of continuous inclination. In addition, to ensure the fit between the side wall of the limiting plate 140 and the outer circle of the pressing mechanism 120, the limiting plate 140 is also arc-shaped, and the arc is the same as the arc of the outer circle of the retaining ring 202.

[0022] That is to say, the robotic arm 100 is used to drive the substrate 101 to move in multiple directions, so as to change the position of the retaining ring 202 during the movement. The limiting plate 140 is combined to guide the retaining ring 202, so that the retaining ring 202 enters the guiding groove 130 during the movement, thereby realizing the centering process of the retaining ring 202. During the centering process, the retaining ring 202 is completely separated from the tire 200, thus solving the problem of too small contact area with the retaining ring 202 and improving the pressing efficiency.

[0023] Figure 5 The specific structure of the pressing mechanism 120 is shown. As shown in the figure, a pressing ring 121 for pressing the retaining ring 202 onto the rim 201 is provided at the top of the substrate 101. The contact part of the pressing ring 121 and the rim 201 is preferably made of nylon material, which can reduce the damage caused to the retaining ring 202 by the pressing ring 121 during the pressing process. Specifically, the pressing ring 121 penetrates the substrate 101 longitudinally, and a through groove 122 extending upward is provided at the bottom end. Through such a design, when the pressing ring 121 penetrates the substrate 101 longitudinally, the part of the substrate 101 corresponding to the through groove 122 does not need to be penetrated, so that the central part of the substrate 101 does not need to be hollowed out, which is convenient for arranging the hydraulic cylinder 123. Here, the hydraulic cylinder 123 is arranged at the top of the substrate 101, and the top end is fixedly connected to the top of the pressing ring 121. The hydraulic cylinder 123 controls the up and down movement of the pressing ring 121 by telescoping.

[0024] The specific pressing process of the pressing equipment will be described in detail below.

[0025] First, as shown in the upper half of the figure in Figure 7 . That is, the retaining ring 202 is in an inclined state in the figure. At this time, the robotic arm 100 drives the substrate 101 to tilt towards the limiting plate 140. During the tilting process, the retaining ring 202 will slide to the limiting plate 140. Since the end of the limiting plate 140 extends to the surface of the tire 200, the limiting plate 140 will block the retaining ring 202. Then, the substrate 101 is tilted as shown in the lower half of the figure in Figure 7 (i.e., the first movement direction). During this process, the tilting angle of the substrate 101 is greater than 90 degrees. In this way, the retaining ring 202 will slide into the guiding groove 130 under the action of tilting.

[0026] Then, as shown in the upper half of the figure in Figure 8 . The robotic arm 100 drives the substrate 101 to tilt away from the limiting plate 140 (i.e., the second movement direction). At this time, the retaining ring 202 will fall into the limiting end 131 of the guiding groove 130 under the action of gravity, that is, the retaining ring 202 is coaxial with the rim 201.

[0027] Then, as shown in Figure 8as shown in the lower half of the figure. Drive the substrate 101 to rotate 180 degrees by the robotic arm 100 (relative to Figure 7 the upper half of the figure). At this time, drive the pressure ring 121 to move towards the retaining ring 202, so that the pressure ring 121 presses the retaining ring 202 against the surface of the rim 201. Then control the substrate 101 to return to Figure 7 the state as shown in the upper half of the figure, and place the rim 201 on the ground or the workbench. Then further drive the pressure ring 121 to move to press-fit the retaining ring 202 onto the rim 201.

[0028] Alternatively, in another embodiment, the rim 201 may not be placed on the ground or the workbench (i.e., not restored to Figure 7 the state as shown in the upper half of the figure). Specifically, as shown in Figure 3 , a retaining rod 112 is fixedly provided at the bottom end of the clamping member 111, and one end of the retaining rod 112 extends towards the rim 201. When the clamping member 111 clamps and fixes the tire 200, one end of the retaining rod 112 is at the bottom of the rim 201 for limiting the rim 201. In this way, when in the state shown in the lower half of Figure 8 the figure, due to the limitation of the retaining rod 112, when the pressure ring 121 drives the retaining ring 202 to the surface of the rim 201, the rim 201 will not be displaced. At this time, only need to continue to drive the retaining ring 202 to move towards the rim 201 to achieve press-fitting the retaining ring 202 onto the rim 201.

[0029] Moreover, to improve the press-fitting efficiency. In some embodiments, as shown in Figure 9 , in this example, the two ends of the retaining rod 112 are set at different heights. Specifically, the height of the end of the retaining rod 112 close to the clamping mechanism 110 is higher than the other end, and an inclined surface 117 is provided for transition between the two ends.

[0030] With such a setting, when it is necessary to press-fit the retaining ring 202 onto the rim 201, as shown in Figure 10 , further drive the plurality of clamping members 111 to move closer to each other, so that the clamping members 111 drive the retaining rod 112 to move towards the rim 201. At this time, the retaining rod 112 squeezes the rim 201 upward through the inclined surface 117, causing the rim 201 to move upward. After the rim 201 moves upward, the distance between the annular groove on the outer circle of the rim 201 and the inner circle of the tire 200 will increase. In this way, when the pressure ring 121 press-fits the retaining ring 202 to the rim 201, the rim 201 will not contact the tire 200, avoiding the tire 200 applying an upward resistance to the retaining ring 202.

[0031] It can be seen that the limiting plate 140 can not only guide the retaining ring 202 during the flipping process, but also prevent the tire 200 from deforming upward during the press-fitting process, so that the rim 201 can protrude from the tire 200, reducing the upward resistance exerted by the tire 200 on the retaining ring 202 during the press-fitting process.

[0032] It should be noted that during the further extrusion of the tire 200, due to the presence of the limiting plate 140, the limiting plate 140 can prevent the tire 200 from deforming upward, so that the distance between the annular groove on the outer ring of the rim 201 and the inner ring of the tire 200 increases after the rim 201 moves upward.

[0033] For easy understanding, Figure 10 in which h1 is the distance between the rim 201 and the top of the clamping member 111 when the rim 201 is not extruded and moved upward by the retaining rod 112, and h2 is the distance between the rim 201 and the top of the clamping member 111 when the rim 201 is extruded and moved upward by the retaining rod 112. Among them, the distance h2 is less than the distance h1. That is to say, Figure 10 the rim 201 in the lower half of has moved upward, and the distance between the annular groove on the outer ring of the rim 201 and the inner ring of the tire 200 has increased. In this way, the retaining ring 202 will hardly contact the tire 200.

[0034] In addition, to further improve the limiting plate 140's ability to block the upward deformation of the tire 200. In this embodiment, the limiting plates 140 are symmetrically arranged on both sides of the base plate 101, and both limiting plates 140 are slidably connected to the base plate 101. The limiting plates 140 are driven to move to the top of the tire 200 through the sliding connection, so as to limit the tire 200. The driving of the limiting plate 140 is preferably a second air cylinder 141. Specifically, one end of the second air cylinder 141 is connected to the mounting plate provided at the bottom of the base plate 101, and the other end is fixedly connected to the limiting plate 140. In this way, during the further extrusion of the tire 200 by the clamping member 111, the second air cylinder 141 drives the limiting plate 140 to move towards the inner ring of the tire 200, so as to avoid the upward deformation of the part of the tire 200 close to the rim 201.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A retaining ring press-fitting device for assembling a tire, comprising a base plate (101), a clamping mechanism (110) and a press-fitting mechanism (120) provided on the base plate (101). The clamping mechanism (110) is used for clamping and fixing the tire (200); the press-fitting mechanism (120) is used for press-fitting the retaining ring (202) onto the rim (201); and it is characterized in that: A robotic arm (100) is connected to one side of the base plate (101), and the robotic arm (100) is used to drive the base plate (101) to move in multiple directions, so that the base plate (101) has at least a first movement direction and a second movement direction; It further includes a guiding groove (130) and a limiting plate (140) provided at the bottom of the base plate (101), wherein the limiting plate (140) is arranged corresponding to the first movement direction; In the first movement direction, the retaining ring (202) moves towards the limiting plate (140), and the limiting plate (140) guides the retaining ring (202) towards the guiding groove (130); in the second movement direction, the retaining ring (202) enters the guiding groove (130), and the guiding groove (130) restricts the retaining ring (202) to be coaxial with the rim (201).

2. The retaining ring pressing device for tire assembly according to claim 1, characterized in that: One end of the guiding groove (130) is a limiting end (131), and the other end extends towards the end of the base plate (101). When the outer ring of the retaining ring (202) contacts the limiting end (131), the retaining ring (202) is coaxial with the rim (201).

3. The retaining ring pressing device for tire assembly according to claim 2, characterized in that: The orientation of the limiting end (131) of the guiding groove (130) corresponds to the second movement direction, and the orientation of the other end corresponds to the first movement direction.

4. The retaining ring press-fitting device for tire assembly according to claim 2, characterized in that: Both ends of the guiding groove (130) are arranged in an arc shape, and the radian is the same as the radian of the outer ring of the retaining ring (202).

5. The snap ring pressing device for tire assembly according to claim 2, characterized in that: The limiting plate (140) is connected to the bottom of the base plate (101) and is located at one end of the guiding groove (130) away from the limiting end (131); the bottom end of the limiting plate (140) extends to the surface of the tire (200) and is used for limiting the retaining ring (202) affected by the first movement direction.

6. The retaining ring press-fitting device for tire assembly according to claim 1, characterized in that: The clamping mechanism (110) includes a plurality of clamping members (111) provided at the bottom of the base plate (101). The plurality of clamping members (111) are all connected to a driving member, and the driving member drives the plurality of clamping members (111) to move closer to each other to clamp and fix the tire (200).

7. The snap ring pressing equipment for tire assembly according to claim 1, characterized in that: The press-fitting mechanism (120) includes a pressing ring (121) located at the top of the base plate (101). The pressing ring (121) is slidably penetrated through the base plate (101) and is used for press-fitting the retaining ring (202) to the rim (201); It further includes a hydraulic cylinder (123) for driving the pressing ring (121) to move.

8. The snap ring pressing device for tire assembly according to claim 6, characterized in that: One end of a stop rod (112) extending towards the rim (201) is fixedly provided at the bottom end of the clamping member (111). After the clamping member (111) clamps and fixes the tire (200), one end of the stop rod (112) is located at the bottom of the rim (201) and is used for limiting the rim (201).

9. The rim press-fitting device for tire assembly according to claim 8, characterized in that: The height of one end of the shift lever (112) close to the clamping mechanism (110) is higher than that of the other end, and an inclined surface (117) is provided for transition between the two ends. The inclined surface (117) is used to squeeze the rim (201) upward, so that the top of the rim (201) protrudes above the top of the tire (200).

10. The retaining ring pressing device for tire assembly according to claim 9, characterized in that: The limiting plates (140) are symmetrically arranged on both sides of the substrate (101), and both limiting plates (140) are slidably connected to the substrate (101); a second cylinder (141) for driving the substrate (101) to move to the top of the tire (200) is connected to one side of the substrate (101).

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