Robot rotating arm structure

Abstract

The utility model discloses a robot rotating arm structure which comprises supports, a shaft rod is arranged between the two supports, the outer ring of the shaft rod is sleeved with a rotating arm, sealing grooves are formed in the two sides of the rotating arm, arc-shaped sliding rails are arranged in inner cavities of the sealing grooves, a ball groove is formed in one side of each support, and a plurality of balls are arranged in an inner cavity of the ball groove. Through cooperative use of the balls, the ball groove and the arc-shaped sliding rail, the multiple balls are annularly distributed in the inner cavity of the ball groove, part of the balls are located on the outer side of the ball groove and attached to the inner wall of the arc-shaped sliding rail, and when the rotating arm rotates on the outer ring of the shaft rod, the balls rotate in the inner cavity of the arc-shaped sliding rail; therefore, friction generated between the rotating arm and the support is reduced, gaps generated between the side wall of the rotating arm and the support due to abrasion are avoided, stable operation of the rotating arm is guaranteed, shaking is avoided, and the use reliability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of robots, in particular to a robot rotating arm structure. Background Art

[0002] Industrial robots are multi-joint manipulators or multi-degree-of-freedom machine devices for the industrial field. They can perform work automatically and rely on their own power and control capabilities to achieve various functions. They can accept human commands or run according to pre-programmed programs. Modern industrial robots can also act according to the principles and guidelines formulated by artificial intelligence technology.

[0003] After searching, in the prior art, the utility model with publication number CN213054892U discloses a rotating structure for a robot arm, including a robot shoulder and an upper arm, the right end of the robot shoulder is connected to a first connecting ball socket, and a connecting ball head is arranged inside the first connecting ball socket, the upper arm is connected to the lower end of the connecting ball head, and the lower end of the upper arm is connected to a mechanical arm rotating shaft, the other end of the mechanical arm rotating shaft is connected to a lower arm, and the other end of the lower arm is connected to a second connecting ball socket, a mechanical hand is arranged inside the second connecting ball socket, and the right end of the mechanical hand is connected to a clamp, the lower side of the right end of the clamp is connected to a fixed clamp, and a movable clamp is arranged above the fixed clamp. The rotating structure for the robot arm is provided with a first connecting ball socket, and the connecting ball head can rotate freely in the first connecting ball socket, imitating the ball and socket joint of the human shoulder to rotate, so that the robot arm rotates more smoothly.

[0004] And the prior art, a rotating arm mechanism and a robot with publication number CN210879643U.

[0005] The above-mentioned various technical solutions make the use of the robot arm better through different methods, but the above-mentioned methods still have the following shortcomings: the arm needs to make circular motion with the connecting structure as the center. When the arm rotates, a certain friction will be generated between the arm and the connecting structure. Due to wear, a certain gap will be generated between the arm and the connecting structure, thereby affecting the stability of the arm. Utility Model Content

[0006] The purpose of the utility model is to provide a robot arm structure to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: it includes a bracket, an axle rod is arranged between two of the brackets, the outer ring of the axle rod is provided with a rotating arm, sealing grooves are provided on both sides of the rotating arm, the inner cavity of the sealing groove is provided with an arc-shaped slide rail, a ball groove is provided on one side of the bracket, and the inner cavity of the ball groove is provided with a plurality of balls.

[0008] Preferably, the diameter of the arc-shaped slide rail is consistent with the diameter of the ball groove, and the outer ring of the ball fits with the inner wall of the arc-shaped slide rail.

[0009] Preferably, a rotating groove is formed through the inner cavity of the rotating arm on the left and right sides, and a bearing is sleeved in the inner cavity of the rotating groove. The rotating arm is rotatably connected to the shaft rod through the bearing.

[0010] Preferably, a sealing ring is provided on one side of the bracket, the sealing ring is movably engaged with the sealing groove, an injection hole is provided on the top of the sealing ring, and the ball groove is located in the inner cavity of the sealing ring.

[0011] Preferably, a plurality of reinforcing ribs are provided on the other side of the bracket.

[0012] Preferably, one end of the plurality of reinforcing ribs is commonly connected to a fan, and a fan is disposed in an inner cavity of the fan.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The robot arm structure uses a ball, a ball groove and an arc-shaped slide rail. Multiple balls are distributed in an annular shape in the inner cavity of the ball groove, and part of the area of ​​the ball is located on the outside of the ball groove and fits with the inner wall of the arc-shaped slide rail. When the arm rotates on the outer ring of the shaft, the ball rotates in the inner cavity of the arc-shaped slide rail to reduce the friction between the arm and the bracket, so as to avoid a gap between the side wall of the arm and the bracket due to wear, thereby ensuring that the arm can operate stably without shaking, so as to improve the reliability of the device.

[0015] 2. The robot arm structure uses a sealing ring, an injection hole and a sealing groove in coordination. After an injection hole is preset on the top of the sealing ring, lubricating oil can be injected into the sealing ring through the injection hole to lubricate the ball, so that the friction coefficient is further reduced. At the same time, the ball can be prevented from rusting to increase the service life of the device. When the sealing ring is clamped in the inner cavity of the sealing groove, the lubricating oil will be locked in the sealing ring to prevent leakage, thereby ensuring that the ball can be in a lubricated state. At the same time, lubricating oil resources can be saved and environmental pollution caused by lubricating oil leakage can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model.

[0017] Figure 2 This is a schematic diagram of the disassembly of the structure of the utility model.

[0018] Figure 3 It is a complete schematic diagram of the structural ball of the utility model.

[0019] Figure 4 It is a complete schematic diagram of the arc-shaped slide rail of the utility model.

[0020] In the figure: 1. bracket; 2. shaft; 3. rotating arm; 4. rotating groove; 5. bearing; 6. ball groove; 7. ball; 9. sealing groove; 10. arc slide rail; 11. sealing ring; 12. injection hole; 13. reinforcing rib; 14. blower; 15. fan. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example: See Figure 1-4 The utility model provides a technical solution: a robot arm structure, including a bracket 1, a shaft 2 is arranged between two brackets 1, a rotating arm 3 is arranged on the outer ring of the shaft 2, sealing grooves 9 are provided on both sides of the rotating arm 3, and an arc-shaped slide rail 10 is provided in the inner cavity of the sealing groove 9, a ball groove 6 is provided on one side of the bracket 1, and a plurality of balls 7 are provided in the inner cavity of the ball groove 6.

[0023] The diameter of the arc-shaped slide rail 10 is consistent with the diameter of the ball groove 6 , and the outer ring of the ball 7 fits with the inner wall of the arc-shaped slide rail 10 .

[0024] The inner cavity of the rotating arm 3 is penetrated by a rotating groove 4 on the left and right sides, and the inner cavity of the rotating groove 4 is sleeved with a bearing 5. The rotating arm 3 is rotatably connected to the shaft rod 2 through the bearing 5.

[0025] In this embodiment, the bearing 5 serves as a connecting piece between the rotating arm 3 and the shaft rod 2, and has the function of reducing friction and making the rotation smoother.

[0026] When the device is assembled, the rotating arm 3 is located between the two brackets 1 , and the side wall of the arc-shaped slide rail 10 is in contact with one side of the bracket 1 .

[0027] Reference Figure 1 , 2 Part of the area of ​​the ball 7 is located on the outside of the ball groove 6 and fits with the inner wall of the arc-shaped slide rail 10. When the swing arm 3 rotates on the outer ring of the shaft 2, the ball 7 rotates in the inner cavity of the arc-shaped slide rail 10 to reduce the friction between the swing arm 3 and the bracket 1, so as to prevent the side wall of the swing arm 3 from wearing and causing a gap between the bracket 1, thereby ensuring that the swing arm 3 can operate stably and improving the reliability of the device.

[0028] A sealing ring 11 is provided on one side of the bracket 1 , and the sealing ring 11 is movably engaged with the sealing groove 9 . An injection hole 12 is provided on the top of the sealing ring 11 , and the ball groove 6 is located in the inner cavity of the sealing ring 11 .

[0029] In this embodiment, refer to Figure 2 The sealing ring 11 and the ball groove 6 share the same center, and the ball groove 6 is located at the inner ring position of the sealing ring 11, so that the ball 7 is enclosed by the sealing ring 11.

[0030] When in use, the lubricating oil is injected into the inner cavity of the sealing ring 11 through the injection hole 12 to lubricate the ball 7, so that the friction coefficient is further reduced, and the ball 7 can be prevented from rusting, thereby increasing the service life of the device.

[0031] When the sealing ring 11 is clamped in the inner cavity of the sealing groove 9, the lubricating oil will be isolated in the inner cavity of the sealing ring 11 to prevent the lubricating oil from leaking, thereby improving the sealing performance and environmental protection of the device.

[0032] A plurality of reinforcing ribs 13 are disposed on the other side of the bracket 1 .

[0033] In this embodiment, the reinforcing ribs 13 can improve the overall strength of the bracket 1 to improve the pressure-bearing capacity of the bracket 1 and prevent the rotating arm 3 from causing deformation of the bracket 1 when rotating a heavy object, thereby improving the firmness of the device.

[0034] One end of the plurality of reinforcing ribs 13 is commonly connected to a fan 14 , and a fan 15 is disposed in an inner cavity of the fan 14 .

[0035] In this embodiment, when the rotating arm 3 rotates, a certain amount of heat will be generated due to friction. After starting the fan 14, the flow of air can be accelerated by the fan 15, so that the device can be cooled by wind heat exchange to prevent the device structure from accelerating aging due to overheating, thereby further improving the durability of the device.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A robot arm structure, comprising a bracket (1), characterized in that: An axle rod (2) is arranged between the two brackets (1), a rotating arm (3) is arranged on the outer ring of the axle rod (2), sealing grooves (9) are arranged on both sides of the rotating arm (3), an arc-shaped slide rail (10) is arranged in the inner cavity of the sealing groove (9), a ball groove (6) is arranged on one side of the bracket (1), and a plurality of balls (7) are arranged in the inner cavity of the ball groove (6).

2. A robot arm structure according to claim 1, characterized in that: The diameter of the arc-shaped slide rail (10) is consistent with the diameter of the ball groove (6), and the outer ring of the ball (7) fits with the inner wall of the arc-shaped slide rail (10).

3. A robot arm structure according to claim 1, characterized in that: The inner cavity of the rotating arm (3) is penetrated by a rotating groove (4) on the left and right sides, and the inner cavity of the rotating groove (4) is sleeved with a bearing (5). The rotating arm (3) is rotatably connected to the shaft rod (2) via the bearing (5).

4. The robot arm structure according to claim 1, characterized in that: A sealing ring (11) is provided on one side of the bracket (1), the sealing ring (11) is movably engaged with the sealing groove (9), an injection hole (12) is provided on the top of the sealing ring (11), and the ball groove (6) is located in the inner cavity of the sealing ring (11).

5. The robot arm structure according to claim 1, characterized in that: A plurality of reinforcing ribs (13) are provided on the other side of the bracket (1).

6. A robot arm structure according to claim 5, characterized in that: One end of the plurality of reinforcing ribs (13) is commonly connected to a fan (14), and a fan (15) is provided in the inner cavity of the fan (14).

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