Tire gripping device

Abstract

The invention relates to a clamping tool, in particular to a tire grabbing device which comprises a plurality of grappling hooks, the upper ends of the grappling hooks are hinged to a base, the base is arranged on a bottom plate, a fixing seat is arranged below the bottom plate, the middle of each grappling hook is connected to the fixing seat through a first connecting rod, and the fixing seat is connected with a cam through a second connecting rod. The cam is connected to a rotating shaft of the planet wheel speed reducer, the planet wheel speed reducer is connected with the servo motor, under driving of the servo motor, the second connecting rod drives the fixing base to do lifting motion, the fixing base drives the claw hook to do opening and closing motion, and therefore the tire is grabbed. The tire grabbing device is simple and small in structure, low in site requirement, high in universality, suitable for most tires in the market, free of an air source and capable of being used only by being powered on, the use requirement is lowered, and full-automatic operation can be achieved when the tire grabbing device is used in cooperation with a mechanical arm.

Description

Technical Field

[0001] The invention relates to a clamping tool, in particular to a tire gripping device. Background Art

[0002] The ambient temperature is high, and the tire size and weight span are relatively large. The existing structure adopts an internal support form, and the support force is too large, which can easily cause the inner edge of the tire to deform and affect the yield rate.

[0003] The invention patent with application number 201410177706.5 claims protection for a clamp for tire installation. In the process of clamping the tire, the clamp is pushed to the outermost end of the horizontal groove by the connecting rod. When the clamp is driven to the innermost end of the horizontal groove by the connecting rod, the clamp releases the clamp on the inner ring of the tire. The opening and closing of the clamp is controlled by horizontal sliding. For tires with large differences in size, a longer slide rail is required, which makes the size of the clamp larger, which not only occupies a larger space, but also increases the manufacturing cost. In addition, the above clamp also needs to be provided with a limit structure. After the tire is installed, the limit structure needs to be manually adjusted to release the state of parallel contact between the block and the outer ring surface of the tire.

[0004] For projects with specific requirements, customers require that the same clamping device be able to grip tires of different sizes with an inner diameter of 370-630mm, an outer diameter of 680-1260mm, a tire height of 260-650mm, and a weight of ≤100kg. The existing clamping devices cannot meet the above requirements. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a tire gripping device. The tire gripping device of the present invention has a simple and compact structure, has low requirements on the site, has strong versatility, is applicable to most tires on the market, does not require an air source, can be used by just turning on the power, reduces the use requirements, and can be used in conjunction with a manipulator to achieve full automatic operation.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the present invention is: A tire gripping device includes a plurality of claw hooks, the upper ends of the claw hooks are hinged on a base, the base is arranged on the bottom plate, a fixed seat is arranged below the bottom plate, the middle part of the claw hook is connected to the fixed seat through a first connecting rod, the fixed seat is connected to a cam through a second connecting rod, the cam is connected to the rotating shaft of the planetary gear reducer, the planetary gear reducer is connected to a servo motor, and under the drive of the servo motor, the second connecting rod drives the fixed seat to move up and down, and the fixed seat drives the claw hook to open and close, thereby achieving gripping of the tire.

[0007] Furthermore, the claw hook gradually turns outward from the upper end to the lower end, and a gripping portion is formed at the lower end of the claw hook. The gripping portion and the upper and middle parts of the claw hook are transitioned through an arc, and the outward rotation angle of the gripping portion is greater than the outward rotation angle of the upper and middle parts of the claw hook. The gripping portion is used to support the upper mouth of the tire embryo, forming an action of gripping the tire embryo.

[0008] Furthermore, the planetary gear reducer is fixed to the base through a motor fixing seat, the upper end of the cam is connected to the rotating shaft of the planetary gear reducer, the lower end of the cam is connected to the upper end of the second connecting rod, and the second connecting rod passes through the base and the bottom plate in sequence and is connected to the fixing seat.

[0009] Furthermore, a fixing plate for connecting the manipulator is arranged above the base plate, the fixing plate is connected to the base plate through a supporting column, the planetary gear reducer is arranged between the fixing plate and the base plate, and the output shaft of the servo motor is connected to the planetary gear reducer.

[0010] Furthermore, the claw hooks are evenly distributed on the base and are arranged in a circular array on the base.

[0011] Further, the cam includes a connecting rod, a hollow cylinder and a fixed shaft, the hollow cylinder is clamped on the rotating shaft of the planetary gear reducer, and the fixed shaft is hinged to the upper end of the second connecting rod; The hollow cylinder is arranged on the top end of the connecting rod, and the fixed shaft is arranged on the side surface of the lower end of the connecting rod.

[0012] Furthermore, the first connecting rod is V-shaped with an opening facing outwards, one end of the first connecting rod is hinged to the middle part of the claw hook, and the other end is hinged to the fixing seat.

[0013] Furthermore, in the process of the claw hooks gathering and expanding, the maximum outer diameter of the claw hooks is 300mm≤d≤810mm, and can support a tire with an inner diameter of 370-630mm, an outer diameter of 680-1260mm, a tire height of 260-650mm, and a weight of ≤100kg.

[0014] The technical solution provided by the embodiment of the present invention has the following beneficial effects: (1) The tire gripping device of the present invention has a simple and compact structure, has low requirements on the site, is highly versatile, and is suitable for most tires on the market. It does not require an air source and can be used by simply turning on electricity, which reduces the requirements for use. In addition, it can be used in conjunction with a manipulator to achieve fully automatic operation.

[0015] (2) During the process of the claws of the tire gripping device of the present invention gathering and expanding, the maximum outer diameter of the claws is 300mm≤d≤810mm, and it can hold up tires with an inner diameter of 370-630mm, an outer diameter of 680-1260mm, a tire height of 260-650mm, and a weight of ≤100kg. It can stably hold tires of all sizes in the project. Currently, 14 sets of tire gripping devices have been manufactured and sent to the Thailand project site for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of a tire gripping device in an embodiment of the present invention.

[0017] Figure 2 It is a front view of the tire gripping device in an embodiment of the present invention.

[0018] Figure 3 It is a left side view of the tire gripping device in an embodiment of the present invention.

[0019] Figure 4 FIG. 1 is a top view of a tire gripping device according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the structure of the tire gripping device when it is expanded in an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the structure of the tire gripping device when it is folded in an embodiment of the present invention.

[0022] Figure 7 Schematic diagram of the exploded structure of the tire gripping device in an embodiment of the present invention.

[0023] Figure 8 Schematic diagram of the structure of the cam in the embodiment of the present invention.

[0024] Fig. 9 It is a front view of the cam in the embodiment of the present invention.

[0025] Fig.10 It is a left view of the cam in the embodiment of the present invention.

[0026] Explanation of the reference numerals: 1-claw hook; 1a-grabbing part; 2-fixed seat; 3-first connecting rod; 4-motor fixed seat; 5-cam; 51-hollow cylinder; 52-connecting rod; 53-fixed shaft; 6-second connecting rod; 7-base; 8-pin shaft; 9-base plate; 10-support column; 11-fixed plate; 12-oil-free bushing; 13-oil-free resin gasket; 14-elastic retaining ring for shaft; 15-hexagon socket head screw; 16-full thread hexagon head bolt; 17-flat washer; 18-standard spring washer; 19-hexagonal nut; 20-planetary gear reducer; 21-servo motor. DETAILED DESCRIPTION

[0027] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Example 1 like Figure 1-4 As shown in 7, a tire gripping device includes 6 claw hooks 1, the upper ends of the claw hooks 1 are hinged on the base 7, the base 7 is arranged on the bottom plate 9, a fixed seat 2 is arranged below the bottom plate 9, the middle part of the claw hook 1 is connected to the fixed seat 2 through the first connecting rod 3, the fixed seat 2 is connected to the cam 5 through the second connecting rod 6, the cam 5 is connected to the rotating shaft of the planetary gear reducer 20, the planetary gear reducer 20 is connected to the servo motor 21, under the drive of the servo motor 21, the second connecting rod 6 drives the fixed seat 2 to move up and down, and the fixed seat 2 drives the claw hook 1 to open and close, so as to grasp the tire.

[0030] The arrangement of the planetary gear reducer 20 can not only reduce the rotation speed of the servo motor 21 , but also provide precise speed control, thereby improving the stability and reliability of the tire gripping device.

[0031] The claw hook 1 gradually turns outward from the upper end to the lower end, and forms a gripping portion 1a at the lower end of the claw hook 1. The gripping portion 1a and the upper and middle parts of the claw hook 1 are transitioned through an arc, and the gripping portion 1a has a greater eversion angle than the upper and middle parts of the claw hook 1. The gripping portion 1a is used to support the upper mouth of the tire embryo, thereby forming an action of gripping the tire embryo.

[0032] The planetary gear reducer 20 is fixed on the base 7 through the motor fixing base 4, one end of the cam 5 is connected to the rotating shaft of the planetary gear reducer 20, and the other end of the cam 5 is connected to the upper end of the second connecting rod 6. The second connecting rod 6 passes through the base 7 and the bottom plate 9 in sequence and is connected to the fixing base 2.

[0033] Specifically, the planetary gear reducer 20 is connected to the motor fixing seat 4 through a full-thread hexagonal head bolt 16 and a hexagonal nut 19 , and is provided with a flat washer 17 and a standard spring washer 18 .

[0034] The base 7 and the bottom plate 9 are connected by a fully threaded hexagonal head bolt 16 , and are provided with a flat washer 17 and a standard spring washer 18 .

[0035] A fixing plate 11 for connecting the manipulator is arranged above the bottom plate 9, the fixing plate 11 is connected to the bottom plate 9 through a support column 10, a planetary gear reducer 20 is arranged between the fixing plate 11 and the bottom plate 9, and the output shaft of the servo motor 21 is connected to the planetary gear reducer 20. Specifically, the planetary gear reducer 20 is connected to the servo motor 21 through a hexagon socket head screw 15, and a flat washer 17 and a standard spring washer 18 are provided.

[0036] Specifically, the upper end of the support column 10 is connected to the fixing plate 11 by a hexagon socket head screw 15 and is provided with a standard spring washer 18; The lower end of the support column 10 is connected to the base plate 9 by a fully threaded hexagonal head bolt 16 , and is provided with a flat washer 17 and a standard spring washer 18 .

[0037] The claw hooks 1 are evenly distributed on the base 7 and arranged in a circular array on the base 7, which can ensure stable gripping of the tire embryo and avoid the problem of weak gripping caused by uneven force on different parts of the tire.

[0038] like Figure 8-10 As shown, the cam 5 includes a connecting rod 52, a hollow cylinder 51 and a fixed shaft 53. The hollow cylinder 51 is clamped on the rotating shaft of the planetary gear reducer 20, and the fixed shaft 53 is hinged to the upper end of the second connecting rod 6; The hollow cylinder 51 is arranged on the top end of the connecting rod 52 , and the fixing shaft 53 is arranged on the lower end side of the connecting rod 52 .

[0039] The cam 5 converts the horizontal rotational motion of the planetary gear reducer 20 into the lifting motion of the second connecting rod 6, and drives the claw hook 1 to perform opening and closing motion, which can be suitable for tire embryos of different sizes.

[0040] The first connecting rod 3 is V-shaped with an opening facing outwards. One end of the first connecting rod 3 is hinged to the middle of the claw hook 1 , and the other end is hinged to the fixing seat 2 .

[0041] Specifically, the two ends of the first connecting rod 3 are connected to the claw hook 1 and the fixing seat 2 respectively through the pin shaft 8, and are provided with an oil-free bushing 12, an oil-free resin gasket 13 and a shaft elastic retaining ring 14. The connection through the pin shaft 8 can ensure that the claw hook 1 can freely gather inward or spread outward, so that the tire gripping device of the present invention is suitable for tires of different specifications.

[0042] In the process of the claw hook 1 gathering to opening, the maximum outer diameter of the claw hook 1 is 300mm≤d≤810mm, and it can support a tire with an inner diameter of 370-630mm, an outer diameter of 680-1260mm, a tire embryo height of 260-650mm, and a weight of ≤100kg. The present invention can grasp tire embryos of different sizes by controlling the opening and closing degree of the claw hook 1. It can be understood that the fixing seat 2 is a circular structure, and the diameter of the fixing seat 2 is smaller than the inner diameter of the claw hook 1 when it is gathered, so that the claw hook 1 can be gathered to the smallest state, which is convenient for grasping the tire with the smallest inner diameter.

[0043] The tire gripping device of the present invention is specially customized for the tire conveyor line. The tire gripping device is installed on a manipulator. After determining the corresponding relationship between the tire and the vulcanizer, the manipulator moves the tire to the corresponding tire storage position of the vulcanizer, and grips the tire through the opening and closing movement of the claw hook 1. It is compatible with tires of all sizes required by this project.

[0044] Working principle of the clamping device: The manipulator reaches the top of the tire embryo and passes through the inner circle of the tire embryo downward. After the detection switch arranged on the side of the claw hook 1 shines on the upper opening of the tire embryo, the manipulator no longer moves downward. At this time, the servo motor 21 starts to start, driving the cam 5 installed on the planetary gear reducer 20 to rotate. During the rotation of the cam 5, the second connecting rod 6 drives the fixed seat 2 to move up and down. During the lifting and lowering of the fixed seat 2, the six claw hooks 1 gather inward or spread outward to achieve the grasping and lowering of the tire.

[0045] The inner diameter of the tire is 370-630mm. According to the size of the tire, the servo motor 21 rotates the corresponding angle so that the claw hook 1 can support tires with different inner diameter specifications. The grabbing part 1a of the claw hook 1 sticks to the upper opening of the tire embryo, and when the manipulator moves up, the clamp lifts the tire embryo. The claw hook 1 only grasps the tire embryo, which is equivalent to the "palm", and the manipulator is used to realize the lifting or translation movement of the tire embryo, which is equivalent to the "arm". The tire gripping device of the present invention only needs to grasp the tire embryo, so the part of the manipulator will not be explained here. It can be understood that the setting of the manipulator belongs to conventional technical means, so it will not be repeated.

[0046] Specifically, during the downward movement of the fixing base 2, the six claw hooks 1 are spread outwards, such as Figure 5 As shown, the gripping portion 1a contacts the upper edge of the tire embryo to grasp the tire embryo; during the upward movement of the fixing seat 2, the six claw hooks 1 gather inward, as shown in FIG. Figure 6 As shown, the green tire is separated from the gripping portion 1 a of the hook 1 .

[0047] The tire gripping device of the present invention grips the upper edge of the tire embryo through the claw hook. Since the upper edge of the tire embryo is thick and has a small deformation, the product yield rate can be significantly improved. Compared with the conventional clamping claw that controls the opening and closing angle of the claw hook in a translational manner, the size of the device can be reduced and the manufacturing cost can be reduced. The structure of the present invention is relatively simple and can be applied to most tires on the market.

[0048] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A tire gripping device, characterized in that: The invention comprises a plurality of claw hooks (1), the upper ends of the claw hooks (1) are hinged on a base (7), the base (7) is arranged on the bottom plate (9), a fixed seat (2) is arranged below the bottom plate (9), the middle part of the claw hook (1) is connected to the fixed seat (2) via a first connecting rod (3), the fixed seat (2) is connected to a cam (5) via a second connecting rod (6), the cam (5) is connected to the rotating shaft of the planetary gear reducer (20), the planetary gear reducer (20) is connected to a servo motor (21), and under the drive of the servo motor (21), the second connecting rod (6) drives the fixed seat (2) to move up and down, and the fixed seat (2) drives the claw hook (1) to open and close, thereby achieving the gripping of the tire.

2. The tire gripping device according to claim 1, characterized in that The claw hook (1) is gradually turned outward from the upper end to the lower end, and a gripping portion (1a) is formed at the lower end of the claw hook (1). The gripping portion (1a) and the upper middle portion of the claw hook (1) are transitioned through an arc, and the gripping portion (1a) has a greater outward angle than the upper middle portion of the claw hook (1). The gripping portion (1a) is used to support the upper opening of the tire embryo, thereby forming an action of gripping the tire embryo.

3. The tire gripping device according to claim 1, characterized in that The planetary gear reducer (20) is fixed to the base (7) via a motor fixing seat (4); the upper end of the cam (5) is connected to the rotating shaft of the planetary gear reducer (20); the lower end of the cam (5) is connected to the upper end of the second connecting rod (6); the second connecting rod (6) passes through the base (7) and the bottom plate (9) in sequence and is connected to the fixing seat (2).

4. The tire gripping device according to claim 1, characterized in that A fixing plate (11) for connecting a manipulator is arranged above the base plate (9); the fixing plate (11) is connected to the base plate (9) via a support column (10); the planetary gear reducer (20) is arranged between the fixing plate (11) and the base plate (9); and the output shaft of the servo motor (21) is connected to the planetary gear reducer (20).

5. The tire gripping device according to claim 1, characterized in that: The claw hooks (1) are evenly distributed on the base (7) and are arranged in a circular array on the base (7).

6. The tire gripping device according to claim 1, characterized in that: The cam (5) comprises a connecting rod (52), a hollow cylinder (51) and a fixed shaft (53); the hollow cylinder (51) is clamped on the rotating shaft of the planetary gear reducer (20); and the fixed shaft (53) is hinged to the upper end of the second connecting rod (6); The hollow cylinder (51) is arranged at the top end of the connecting rod (52), and the fixed shaft (53) is arranged on the side surface of the lower end of the connecting rod (52).

7. The tire gripping device according to claim 1, characterized in that The first connecting rod (3) is V-shaped and has an opening facing outwards; one end of the first connecting rod (3) is hinged to the middle of the claw hook (1), and the other end is hinged to the fixing seat (2).

8. The tire gripping device according to claim 1, characterized in that During the process of the claw hook (1) being gathered and expanded, the maximum outer diameter of the claw hook (1) is 300 mm ≤ d ≤ 810 mm, and the claw hook (1) can support a tire with an inner diameter of 370-630 mm, an outer diameter of 680-1260 mm, a tire embryo height of 260-650 mm, and a weight of ≤100 kg.

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