Mechanical hand overload assembly and mechanical hand

Abstract

The application discloses a mechanical arm overload assembly and a mechanical arm, and belongs to the technical field of mechanical arm overload assembly. The mechanical arm overload assembly comprises a support, one end of the support is provided with a rope collecting assembly, the other end of the support is provided with a rotating rod, a connecting rope is arranged on the rope collecting assembly, the outer side of the rotating rod is fixedly connected with one end of a pulling rope, the connecting rope and the pulling rope are overlapped, an electromagnetic lock two is arranged on the overlapped part of the connecting rope and the pulling rope, an electromagnetic lock one is arranged on the position of the support close to the rope collecting assembly, the rope collecting assembly comprises a cover shell and a volute spring, a supporting rod is arranged in the middle of the inner cavity of the cover shell, a rotating rotating shell is arranged in the middle of the inner cavity of the cover shell, and the supporting rod is located in the rotating shell, the inner end of the volute spring is connected with the outer side of the supporting rod, and the outer end of the volute spring is connected with the inner wall of the rotating shell. The mechanical arm overload assembly has low cost compared with replacing a motor, and has little influence on the working range and working efficiency of the swing mechanical arm.

Description

A robotic arm overload component and a robotic arm Technical Field

[0001] This invention relates to the field of robotic arm technology, specifically to a robotic arm overload component and a robotic arm. Background Technology

[0002] A robotic arm is an electrically controlled machine capable of performing various tasks and is widely used in industrial automation production. Compared to manual transfer, robotic arms reduce the cost of manual operation and avoid possible errors and damage during manual operation. Common robotic arms for transferring workpieces include grippers, a base, and multiple robotic arms. The robotic arms connected to the base are often made longer to increase the range of motion of the robotic arm, but this results in the robotic arm connected to the base bearing the greatest torque.

[0003] When a robotic arm needs to transfer a workpiece beyond its design load, but other large-sized robotic arms are difficult to allocate or replace, the following solutions exist to accomplish a specific task: Replace the motor with a more powerful one to enable the robotic arm to transfer heavier workpieces, but this is costly due to the high cost of motor replacement and modification; or monitor and analyze multiple parameters such as the robotic arm's load and motion trajectory in real time, and temporarily allow for exceeding the workpiece weight limit by reducing the workpiece's moving speed and transfer range. However, the overload range of the robotic arm is limited and affects its working efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a robotic arm overload component and robotic arm, which is less expensive than replacing the motor and has little impact on the working range and efficiency of the swinging robotic arm, and can effectively solve the problems in the background art.

[0005] The technical solution adopted by this invention to solve its technical problem includes:

[0006] On one hand, a robotic arm overload assembly is provided, including a bracket, a rope winding assembly installed at one end of the bracket, a rotating rod provided at the other end of the bracket, a connecting rope provided on the rope winding assembly, a fixed connection between the outer side of the rotating rod and one end of the pulling rope, the connecting rope and the pulling rope intersecting and overlapping, an electromagnetic lock II installed on the overlapping part of the connecting rope and the pulling rope, and an electromagnetic lock I installed on the bracket near the position of the rope winding assembly.

[0007] The rope winding assembly includes a housing and a spiral spring. A support rod is installed in the middle of the inner cavity of the housing. A rotating shell is installed in the inner cavity of the housing, and the support rod is located inside the rotating shell. The inner end of the spiral spring is connected to the outer side of the support rod, and the outer end of the spiral spring is connected to the inner wall of the rotating shell. A connecting rope is wound around the outer side of the rotating shell, and one end of the connecting rope passes through and extends to the outside of the housing.

[0008] Among them, one pair of connecting ropes of the electromagnetic lock is fixed or released, and the overlapping part of the two pairs of connecting ropes and the pulling rope of the electromagnetic lock is fixed or released.

[0009] As a preferred embodiment of the present invention, it further includes a locking assembly, which includes a fixed frame fixed on a bracket. A guide rod one and a guide rod two that slide parallel to each other are mounted on the fixed frame. A rotating connecting wheel is mounted on the fixed frame. The connecting wheel is located between the guide rod one and the guide rod two and is in contact with the guide rod one and the guide rod two. A damping plate is fixed on the guide rod two near the rotating rod. An electromagnetic lock three for fixing or releasing the traction rope is mounted on the guide rod one.

[0010] As a preferred embodiment of the present invention, a speed limiting component is provided at the end of the guide rod two away from the rotating rod. The speed limiting component includes a support frame fixed on the guide rod two. A rotating wheel and a rotating limiting wheel are installed on the support frame. The rotating wheel and the limiting wheel clamp the pulling rope. One end of the rotating wheel is rotatably connected to one end of the locking rod. The other end of the locking rod is provided with a locking block. The guide rod two is provided with a locking groove adapted to the locking block. An elastic pulling member is installed between the locking rod and the end of the rotating wheel.

[0011] As a preferred embodiment of the present invention, the outer circumference of the rotating wheel is provided with an annular groove and / or the outer circumference of the rotating wheel is provided with an annular groove.

[0012] As a preferred embodiment of the present invention, the outer periphery of the connecting wheel is provided with a toothed groove one, the outer side of the guide rod one is provided with a toothed groove two that matches the toothed groove one, and the outer side of the guide rod two is provided with a toothed groove three that matches the toothed groove one.

[0013] As a preferred embodiment of the present invention, the bracket is fixed with a guide frame at a position between the guide rod and the rotating rod, and the traction rope passes through the middle of the guide frame.

[0014] As a preferred embodiment of the present invention, a rope hole is provided on the guide rod, and the pulling rope passes through the rope hole.

[0015] As a preferred embodiment of the present invention, the end of the connecting rope located outside the cover is connected to the support via an elastic band, and the end of the pulling rope located away from the rotating rod is connected to the support via an elastic band.

[0016] On the other hand, a robotic arm is also provided, including any of the aforementioned robotic arm overload components, and further including a support base and a swinging robotic arm mounted on the support base, the swinging robotic arm rotating along a vertical plane, the rotating rod being mounted on the lower end of the swinging robotic arm, and the bracket being fixed on the support base.

[0017] In a preferred embodiment of the present invention, when the swinging robotic arm rotates to a vertical position, the connection between the rotating rod and the traction rope is located at the highest position on the outer side of the rotating rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. The robotic arm overload component of this invention provides additional support force to the swinging robotic arm through a connecting rope, a traction rope, and a rotating rod, enabling the robotic arm to transfer overweight workpieces. Compared with replacing the motor, the robotic arm overload component has lower cost and has less impact on the working range and efficiency of the swinging robotic arm.

[0020] 2. In the example of the overload component of the robot arm of the present invention, when the swinging robot arm swings downward, the worm spring on the rope take-up component shares the impact borne by the motor through the connecting rope and the pull rope. When the swinging robot arm swings upward, the connecting rope and the pull rope move toward the rope take-up component. The pull rope drives the damping plate to press on the rotating rod through the electromagnetic lock three, the guide rod one, the connecting wheel and the guide rod two. The friction between the damping plate and the rotating rod realizes the positioning of the rotating rod, thereby improving the stability and reliability of the robot arm when moving the workpiece.

[0021] 3. In the example of the robot overload component of the present invention, when the swinging robot arm unexpectedly stalls during the transfer of the workpiece, the pull rope, through the speed limiting component and the guide rod, causes the damping plate to press on the rotating rod. The speed limiting component restricts the movement of the pull rope to achieve positioning of the rotating rod and the swinging robot arm, ensuring the safety of the workpiece when the swinging robot arm stalls.

[0022] 4. In the example of the overload component of the robotic arm of the present invention, the distance between the guide frame and the rotating rod is the diameter of the traction rope, so that after the swinging robotic arm rotates from the vertical state, the traction rope is always wrapped around the rotating rod. The rotation angle of the lower end of the swinging robotic arm is proportional to the length of the traction rope wrapped around the rotating rod, ensuring the accuracy of the transmission of the traction rope and the connecting rope.

[0023] 5. In the robotic arm of the present invention, when the swinging robotic arm rotates from a vertical state to both sides, the overload component of the robotic arm continues to provide additional support force to the swinging robotic arm, thereby improving the reliability of the robotic arm. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the manipulator of the present invention from one perspective;

[0025] Figure 2 is a schematic diagram of the overload component of the robotic arm of the present invention from one perspective.

[0026] Figure 3 is an enlarged schematic diagram of the structure at point A in Figure 2;

[0027] Figure 4 is an enlarged schematic diagram of the structure at point B in Figure 2;

[0028] Figure 5 is a schematic diagram of the overload component of the robotic arm of the present invention from another perspective.

[0029] Figure 6 is an enlarged schematic diagram of the structure at point C in Figure 5;

[0030] Figure 7 is a schematic diagram of the rope winding assembly of the present invention from one perspective;

[0031] Figure 8 is a schematic diagram of the rope winding assembly of the present invention from another perspective.

[0032] In the diagram: 1. Rope winding assembly, 101. Cover, 102. Rotating shell, 103. Snail spring, 104. Support rod, 2. Connecting rope, 3. Pulling rope, 4. Rotating rod, 5. Bracket, 6. Swinging robotic arm, 7. Electromagnetic lock one, 8. Electromagnetic lock two, 9. Speed ​​limiting assembly, 91. Clip rod, 92. Rotating wheel, 93. Elastic pulling component, 94. Support frame, 95. Limiting wheel, 10. Electromagnetic lock three, 11. Guide rod one, 12. Guide rod two, 13. Connecting wheel, 14. Fixing frame, 15. Guide frame. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Example 1:

[0035] Please refer to Figures 1-8. This embodiment discloses a robotic arm overload assembly. The robotic arm overload assembly includes a bracket 5. A rope-retracting assembly 1 is installed at one end of the bracket 5, and a rotating rod 4 is provided at the other end of the bracket 5. A connecting rope 2 is provided on the rope-retracting assembly 1. The outer side of the rotating rod 4 is fixedly connected to one end of the pulling rope 3. The connecting rope 2 and the pulling rope 3 intersect and overlap. An electromagnetic lock 2 8 is installed on the connecting rope 2 or the pulling rope 3, and the electromagnetic lock 2 8 is set corresponding to the overlapping part of the connecting rope 2 and the pulling rope 3. An electromagnetic lock 1 7 is installed on the bracket 5 near the position of the rope-retracting assembly 1.

[0036] The rope winding assembly 1 includes a cover 101 and a spiral spring 103. A support rod 104 is fixedly installed in the middle of the inner cavity of the cover 101. A rotating shell 102 is installed in the inner cavity of the cover 101 through a bearing or a rotating pin sleeve, and the support rod 104 is located inside the rotating shell 102. The inner end of the spiral spring 103 is fixedly connected to the outer side of the support rod 104, and the outer end of the spiral spring 103 is fixedly connected to the inner wall of the rotating shell 102. A connecting rope 2 is wound around the outer side of the rotating shell 102, and one end of the connecting rope 2 passes through and extends to the outside of the cover 101.

[0037] Among them, electromagnetic lock 7 fixes or releases the connecting rope 2, and electromagnetic lock 8 fixes or releases the overlapping part of the connecting rope 2 and the pulling rope 3.

[0038] Preferably, when the swinging robotic arm 6 rotates to the vertical position, the connection between the rotating rod 4 and the pulling rope 3 is located at the highest position on the outer side of the rotating rod 4.

[0039] Electromagnetic lock 7 and electromagnetic lock 8 are both electrically connected to an external control switch. Electromagnetic lock 7 and electromagnetic lock 8 in this invention are common electronic devices in the prior art, and their working methods and circuit structures are well-known technologies, which will not be described in detail here.

[0040] The working process and principle of this embodiment are as follows:

[0041] The overload assembly of this robotic arm is installed on the robotic arm. The robotic arm includes a support base and a swinging robotic arm 6 rotatably mounted on the support base. The swinging robotic arm 6 rotates along a vertical plane. A rotating rod 4 is installed at the lower end of the swinging robotic arm 6, and the axis of the rotating rod 4 is coaxial with the rotation axis of the lower end of the swinging robotic arm 6. A bracket 5 is fixedly installed on the support base.

[0042] When the robotic arm needs to work under overload, the swinging robotic arm 6 of the swinging robotic arm first rotates to the vertical position. One end of the bracket 5 with the rotating rod 4 is fixedly installed on the support base. The rotating rod 4 is installed at the lower end of the swinging robotic arm 6 and the axis of the rotating rod 4 is coaxial with the rotation axis of the lower end of the swinging robotic arm 6.

[0043] Electromagnetic lock 7 releases connecting rope 2, and electromagnetic lock 8 fixes the overlapping part of connecting rope 2 and pull rope 3 together. Then, the swinging robotic arm 6 rotates from the vertical position to the horizontal direction by a set angle. The swinging robotic arm 6 drives the rotating rod 4 to rotate and causes part of the pull rope 3 to wrap around the rotating rod 4. Then, electromagnetic lock 7 fixes connecting rope 2 and electromagnetic lock 8 releases connecting rope 2 and pull rope 3. The swinging robotic arm 6 rotates to the vertical position. The connecting rope 2 and pull rope 3 are manually pulled to increase the overlapping length of connecting rope 2 and pull rope 3. The above operation is repeated to increase the length of connecting rope 2 extending out of the cover 101, that is, to increase the supporting force provided by the worm spring 103 to the swinging robotic arm 6 through connecting rope 2, pull rope 3 and rotating rod 4. The overload component of the robotic arm assists in the transfer of overweight workpieces by the robotic arm.

[0044] When the robot transfers the workpiece, electromagnetic lock 28 fixes the overlapping part of connecting rope 2 and pulling rope 3, and electromagnetic lock 7 releases connecting rope 2.

[0045] Example 2:

[0046] As shown in Figures 2, 4, and 5, this embodiment discloses an overload assembly for a robotic arm. Its structure is roughly the same as that of Embodiment 1, except that this embodiment also includes a locking assembly. The locking assembly includes a fixed frame 14 fixed on a bracket 5. A parallel sliding guide rod 11 and a guide rod 2 12 are installed on the fixed frame 14. A rotating connecting wheel 13 is installed on the fixed frame 14 via a bearing. The connecting wheel 13 is located between the guide rod 11 and the guide rod 2 12, and the connecting wheel 13 contacts the guide rod 11 and the guide rod 2 12 respectively. A damping plate is fixed on the guide rod 2 12 near the rotating rod 4. An electromagnetic lock 3 10 for fixing or releasing the traction rope 3 is installed on the guide rod 11.

[0047] Preferably, the damping plate is made of anti-slip rubber or anti-slip silicone.

[0048] The working process and principle of this embodiment are as follows:

[0049] When the robot arm moves together with the workpiece, there is a risk of vibration in the robot arm during the movement of the robot arm and the workpiece. Vibration can easily cause overload of the drive motor of the swinging robot arm 6 in this robot arm.

[0050] Electromagnetic lock 310 fixes the pull rope 3, thus fixing the guide rod 11 and the pull rope 3 together. When the swinging robotic arm 6 swings downward, the worm spring 103 on the rope take-up assembly 1 shares the impact borne by the motor through the connecting rope 2 and the pull rope 3. When the swinging robotic arm 6 swings upward, the connecting rope 2 and the pull rope 3 move toward the rope take-up assembly 1. The pull rope 3 drives the damping plate to press against the rotating rod 4 through electromagnetic lock 310, guide rod 11, connecting wheel 13 and guide rod 212. The friction between the damping plate and the rotating rod 4 achieves the positioning of the rotating rod 4. The overload assembly of the robotic arm improves the stability and reliability of the robotic arm when moving the workpiece.

[0051] Example 3:

[0052] As shown in Figures 2 and 3, this embodiment discloses an overload component for a robotic arm. Its structure is roughly the same as that of Embodiment 2, except that the guide rod 2 12 in this embodiment is provided with a speed limiting component 9 at the end away from the rotating rod 4. The speed limiting component 9 includes a support frame 94 fixed on the guide rod 2 12. A rotating wheel 92 and a rotating limiting wheel 95 are installed on the support frame 94. The rotating wheel 92 and the limiting wheel 95 clamp the pulling rope 3. One end of the rotating wheel 92 is rotatably connected to one end of the locking rod 91. The other end of the locking rod 91 is provided with a locking block. The guide rod 2 12 is provided with a locking groove that matches the locking block. An elastic pulling member 93 is installed between the locking rod 91 and the end of the rotating wheel 92.

[0053] The elastic tensioning element 93 is an elastic rod, spring, or elastic band.

[0054] The working process and principle of this embodiment are as follows:

[0055] When the swinging robotic arm 6 unexpectedly stalls during the transfer of the workpiece, the rotational angular velocity of the lower end of the swinging robotic arm 6 continuously increases, that is, the speed of the pull rope 3 on the rotating rod 4 gradually increases. The pull rope 3 drives the rotating wheel 92 to rotate, and the centrifugal force on the locking rod 91 on the rotating wheel 92 gradually increases. When the locking block of the locking rod 91 disengages from the end face of the rotating wheel 92 and locks into the locking groove on the guide rod 12, the pull rope 3, through the speed limiting component 9 and the guide rod 12, causes the damping plate to press against the rotating rod 4. The speed limiting component 9 restricts the movement of the pull rope 3 to achieve positioning of the rotating rod 4 and the swinging robotic arm 6. When the swinging robotic arm 6 stalls, the overload component of the robotic arm ensures the safety of the workpiece.

[0056] Example 4:

[0057] As shown in Figure 3, this embodiment discloses an overload component for a robotic arm. Its structure is roughly the same as that of Embodiment 3. The difference is that in this embodiment, an annular groove is provided on the outer periphery of the rotating wheel 92 and / or an annular groove is provided on the outer periphery of the rotating wheel 92 to restrict the pulling rope 3 between the rotating wheel 92 and the limiting wheel 95, so as to prevent the rotating wheel 92 and the pulling rope 3 from disengaging.

[0058] Example 5:

[0059] As shown in Figures 2, 4, and 5, this embodiment discloses an overload assembly for a robotic arm. Its structure is roughly the same as that of Embodiment 2, except that the connecting wheel 13 in this embodiment has a toothed groove 1 on its outer periphery, a toothed groove 2 that matches the toothed groove 1 on the outer side of the guide rod 11, and a toothed groove 3 that matches the toothed groove 1 on the outer side of the guide rod 2 12. The connecting wheel 13 is located between the guide rod 11 and the guide rod 2 12, and the guide rod 11 and the guide rod 2 12 are arranged in parallel. The toothed groove 2 on the guide rod 11 and the toothed groove 3 on the guide rod 2 12 both mesh with the toothed groove 1 on the connecting wheel 13, enhancing the timeliness and reliability of the transmission between the guide rod 11 and the guide rod 2 12.

[0060] Example 6:

[0061] As shown in Figures 5 and 6, this embodiment discloses an overload assembly for a robotic arm. Its structure is roughly the same as that of Embodiment 2, except that in this embodiment, the support 5 is fixed with a guide frame 15 between the guide rod 11 and the rotating rod 4. The pull rope 3 passes through the middle of the guide frame 15, and the distance between the guide frame 15 and the rotating rod 4 is the diameter of the pull rope 3. This ensures that after the swinging robotic arm 6 rotates from a vertical position, the pull rope 3 is always wrapped around the rotating rod 4. The angle of rotation of the lower end of the swinging robotic arm 6 is proportional to the length of the pull rope 3 wrapped around the rotating rod 4, ensuring the accuracy of the transmission between the pull rope 3 and the connecting rope 2.

[0062] Example 7:

[0063] As shown in Figures 2, 4 and 6, this embodiment discloses an overload assembly for a robotic arm. Its structure is roughly the same as that of Embodiment 2. The difference is that a rope hole is provided on the guide rod 11 in this embodiment, through which the traction rope 3 passes, thereby improving the stability of the traction rope 3 at the guide rod 11.

[0064] Example 8:

[0065] As shown in Figures 2 and 5, this embodiment discloses an overload assembly for a robotic arm. Its structure is roughly the same as that of Embodiment 1. The difference is that in this embodiment, the end of the connecting rope 2 located outside the housing 101 is connected to the support 5 by an elastic band 1. The elastic band 1 is located between the rotating rod 4 and the connecting rope 2. The end of the pulling rope 3 away from the rotating rod 4 is connected to the support 5 by an elastic band 2. The elastic band 2 is located between the pulling rope 3 and the rope winding assembly 1. The elastic band 1 and the elastic band 2 keep the connecting rope 2 and the pulling rope 3 taut at all times, which facilitates the adjustment of the overlap length of the connecting rope 2 and the pulling rope 3.

[0066] Example 9:

[0067] As shown in Figures 1-8, this embodiment discloses a robotic arm, including a robotic arm overload component of any one of embodiments 1 to 8.

[0068] The robotic arm includes a support base and a swinging robotic arm 6 rotatably mounted on the support base, the swinging robotic arm 6 rotating along a vertical plane.

[0069] The rotating rod 4 is installed at the lower end of the swinging robotic arm 6, and the axis of the rotating rod 4 is coaxial with the rotation axis of the lower end of the swinging robotic arm 6. The bracket 5 is fixedly installed on the support base.

[0070] The support base and swinging robotic arm 6 in this invention are conventional components in existing robotic arms, and their working methods and circuit structures are well-known technologies, so they will not be described in detail here.

[0071] The safety of the swing arm 6 is ensured by utilizing the redundant strength of the swing arm 6 and / or by installing additional structural reinforcements on the swing arm 6 and / or reducing the moving speed of the swing arm 6.

[0072] 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. An overload component for a robotic arm, characterized in that: The bracket (5) includes a support (5) and a locking assembly. One end of the support (5) is equipped with a rope-retracting assembly (1), and the other end of the support (5) is provided with a rotating rod (4). A connecting rope (2) is provided on the rope-retracting assembly (1). The outer side of the rotating rod (4) is fixedly connected to one end of a pulling rope (3). The connecting rope (2) and the pulling rope (3) intersect and overlap. An electromagnetic lock (8) is installed on the overlapping portion of the connecting rope (2) and the pulling rope (3). The support (5) is close to the rope-retracting assembly (… An electromagnetic lock (7) is installed at position 1); the rope winding assembly (1) includes a cover (101) and a spiral spring (103). A support rod (104) is installed in the middle of the inner cavity of the cover (101). A rotating shell (102) is installed in the inner cavity of the cover (101), and the support rod (104) is located inside the rotating shell (102). The inner end of the spiral spring (103) is connected to the outer side of the support rod (104), and the outer end of the spiral spring (103) is connected to the rotating shell (102). The inner wall of the shell (102) is connected, and a connecting rope (2) is wound around the outside of the rotating shell (102). One end of the connecting rope (2) passes through and extends to the outside of the cover (101). The locking assembly includes a fixing frame (14) fixed on the bracket (5). A parallel sliding guide rod one (11) and a guide rod two (12) are installed on the fixing frame (14). A rotating connecting wheel (13) is installed on the fixing frame (14). The connecting wheel (13) is located at the guide rod one (11) (12) (13 ... Between the guide rod (11) and the guide rod (2), and the connecting wheel (13) is in contact with the guide rod (11) and the guide rod (2). The guide rod (2) is fixed with a damping plate near the rotating rod (4). The guide rod (11) is equipped with an electromagnetic lock (3) for fixing or releasing the traction rope (3). Among them, the electromagnetic lock (7) fixes or releases the connecting rope (2), and the electromagnetic lock (8) fixes or releases the overlapping part of the connecting rope (2) and the traction rope (3).

2. The robotic arm overload component according to claim 1, characterized in that: The guide rod 2 (12) is provided with a speed limiting component (9) at the end away from the rotating rod (4). The speed limiting component (9) includes a support frame (94) fixed on the guide rod 2 (12). A rotating wheel (92) and a rotating limiting wheel (95) are installed on the support frame (94). The rotating wheel (92) and the limiting wheel (95) clamp the pulling rope (3). The end of the rotating wheel (92) is rotatably connected to one end of the locking rod (91). The other end of the locking rod (91) is provided with a locking block. The guide rod 2 (12) is provided with a locking groove that matches the locking block. An elastic pulling member (93) is installed between the end of the locking rod (91) and the end of the rotating wheel (92).

3. The robotic arm overload component according to claim 2, characterized in that: The outer periphery of the rotating wheel (92) is provided with an annular groove and / or the outer periphery of the rotating wheel (92) is provided with an annular groove.

4. The robotic arm overload component according to claim 1, characterized in that: The connecting wheel (13) has a toothed groove on its outer periphery, the guide rod (11) has a toothed groove (2) on its outer side that matches the toothed groove, and the guide rod (2) has a toothed groove (3) on its outer side that matches the toothed groove.

5. The robotic arm overload component according to claim 1, characterized in that: The bracket (5) is fixed with a guide frame (15) at a position between the guide rod (11) and the rotating rod (4), and the pull rope (3) passes through the middle of the guide frame (15).

6. The robotic arm overload component according to claim 1, characterized in that: The guide rod (11) has a rope hole, through which the pulling rope (3) passes.

7. The robotic arm overload component according to claim 1, characterized in that: The end of the connecting rope (2) located outside the cover (101) is connected to the bracket (5) by an elastic band one, and the end of the pulling rope (3) located away from the rotating rod (4) is connected to the bracket (5) by an elastic band two.

8. A robotic arm, characterized in that: The robotic arm overload assembly according to any one of claims 1-7 further includes a support base and a swinging robotic arm (6) mounted on the support base, the swinging robotic arm (6) rotating along a vertical plane, the rotating rod (4) being mounted on the lower end of the swinging robotic arm (6), and the bracket (5) being fixed on the support base.

9. The robotic arm according to claim 8, characterized in that: When the swinging robotic arm (6) rotates to the vertical position, the connection between the rotating rod (4) and the pulling rope (3) is located at the highest position outside the rotating rod (4).

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