Power-assisted mechanical arm

Abstract

The utility model relates to the technical field of mechanical arms, in particular to a power-assisted mechanical arm. The mechanical arm comprises a base and a connecting assembly, a mechanical arm body is movably arranged on the base, a clamp used for clamping a workpiece is arranged at one end of the mechanical arm body, and the connecting assembly is arranged between the mechanical arm body and the clamp and used for detachably assembling the mechanical arm body and the clamp. The connecting assembly connected with the clamp is arranged at the end of the mechanical arm, the moving mechanism is used for driving the clamping block to move, so that the clamping block is clamped with the clamping groove in the mounting cover, the clamp is clamped on the fixing seat at one end of the mechanical arm through the mounting cover, and the clamping block can be driven to be separated from the clamping groove only through the self-locking manual part. And under the action of the worm and the turbine, the worm and the turbine are in a self-locking state in a natural state, so that the mounting cover is prevented from being separated from the clamping block under the action of external force, and the connection stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical arms, in particular to a power-assisted mechanical arm. Background Art

[0002] Power-assisted robotic arms generally refer to a mechanical device designed to assist humans in completing various tasks. These robotic arms usually have an electric drive system that can provide additional strength and precise control to enhance the user's ability at work or in daily life. Power-assisted robotic arms are widely used in many fields, such as healthcare, industrial production, disability assistance, military applications, etc.

[0003] A Chinese patent with authorization announcement number CN220680846U discloses a power-assisted robotic arm, which is provided with a robotic arm and a fork mechanism. The robotic arm and the fork mechanism can be detachably assembled through a connecting mechanism. The setting and use of the connecting mechanism facilitates the connection, fixation and removal of the fork mechanism and the power-assisted robotic arm, thereby facilitating the installation and disassembly of the fork mechanism, and further facilitating the replacement of the fork mechanism, thereby saving replacement time and improving production efficiency.

[0004] However, when the power-assisted robotic arm mentioned above uses a connecting mechanism to assemble the two, the assembly of the two is released by rotating a swivel. During use, the swivel is very likely to be accidentally touched by the outside world and rotate out of position, causing the fork mechanism to fall from the robotic arm. The stability and reliability of the connection between the two are low. Utility Model Content

[0005] In view of the problems existing in the background technology, a power-assisted mechanical arm is proposed. A connection assembly connected to a clamp is arranged at the end of the mechanical arm, and a moving mechanism is used to drive a card block to move so that the card block is engaged with a card slot in a mounting cover, thereby engaging the clamp on a fixed seat at one end of the mechanical arm through the mounting cover, and the card block can only be driven to disengage from the card slot by a self-locking manual part, so as to avoid the mounting cover and the card block being separated under the action of an external force, and the stability of the connection is mentioned.

[0006] The utility model provides a power-assisting mechanical arm, comprising

[0007] A base, on which a mechanical arm body is movably arranged, and one end of the mechanical arm body is provided with a fixture for clamping a workpiece;

[0008] The connecting component is arranged between the robot arm body and the clamp and is used for detachably assembling the robot arm body and the clamp.

[0009] Preferably, the connecting assembly includes a fixing seat, a mounting cover, a clamping block and a moving mechanism, the fixing seat and the mounting cover are respectively arranged at opposite ends of the mechanical arm body and the clamp, positioning pieces are arranged on opposite sides of the two, and a cross groove is provided on the end surface of the fixing seat;

[0010] The card blocks are arranged in four groups in an L-shaped structure, and their vertical sections extend into the four strip sections in the cross groove respectively. The horizontal sections are engaged and connected with the installation cover when moving. A moving mechanism is arranged in the fixing seat to drive the four groups of card blocks to move synchronously.

[0011] Preferably, the inner wall of the mounting cover is provided with four groups of slots equidistantly arranged in a circumference, and the four groups of slots are respectively engaged and connected with the four groups of card blocks.

[0012] Preferably, the positioning member includes a positioning block, the end surface of the fixing seat is provided with a plurality of groups of positioning blocks, the inner wall of the mounting cover is provided with a plurality of groups of positioning grooves extending to the end surface thereof, and the positioning blocks and the corresponding positioning grooves are interlaced and connected.

[0013] Preferably, the moving mechanism comprises a threaded rod, a bevel gear, a rotating shaft, a toothed disc and a self-locking manual member, the threaded rod is provided with four groups, which are respectively rotatably connected in the bar segments of the cross groove, the four groups of threaded rods are respectively threadedly connected with the four groups of blocks, and the opposite ends of the four groups of threaded rods are connected with bevel gears;

[0014] A rotating shaft is rotatably arranged in the fixed seat, one end of the rotating shaft is connected to a toothed disc extending below the four sets of bevel gears, the toothed discs are respectively meshed and connected with the four sets of bevel gears, and a self-locking manual part for driving the rotating shaft to rotate is arranged in the middle of the rotating shaft.

[0015] Preferably, the self-locking manual part includes a worm wheel, a worm and a handle, the worm wheel is mounted on the rotating shaft, the worm is laterally rotatably connected to the inner side of the fixed seat, it is meshingly connected to the turbine, and one end of the worm passes through the fixed seat and is connected to the handle.

[0016] Preferably, a cross guide rod is further provided in the cross groove and is located above the threaded rod, and the four groups of clamping blocks are all slidably connected to the cross guide rod.

[0017] Through the above technical scheme, that is, the power-assisted robotic arm disclosed by the utility model, a connecting component connected to the clamp is provided at the end, and a moving mechanism is used to drive the card block to move, so that the card block is engaged with the card slot in the mounting cover, so that the clamp is engaged with the fixed seat at one end of the robotic arm through the mounting cover, and the card block can be driven to disengage from the card slot only through a self-locking manual part. Under the action of the worm and the turbine, the two are in a self-locking state in a natural state, avoiding the separation of the mounting cover and the card block under the action of external force, thereby improving the stability of the connection.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a power-assisted mechanical arm of the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the partial structure of ;

[0021] Figure 3 for Figure 2 A side view schematic diagram of the structure;

[0022] Figure 4 for Figure 2 A schematic diagram of a local enlarged structure;

[0023] Figure 5 for Figure 4 Schematic diagram of the side structure.

[0024] Figure numerals: 1. base; 2. robot arm body; 3. fixture; 4. fixing seat; 5. mounting cover; 6. clamping block; 7. cross groove; 8. clamping slot; 9. positioning block; 10. positioning slot; 11. threaded rod; 12. bevel gear; 13. rotating shaft; 14. gear disc; 15. worm wheel; 16. worm; 17. handle; 18. cross guide rod. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] Embodiment 1

[0027] like Figure 1-Figure 5 As shown, the utility model proposes an assistive robotic arm, including a base 1 and a connecting assembly, a robotic arm body 2 is movably arranged on the base 1, a clamp 3 for clamping a workpiece is arranged at one end of the robotic arm body 2, and the connecting assembly is arranged between the robotic arm body 2 and the clamp 3, for detachably assembling the robotic arm body 2 and the clamp 3.

[0028] The clamp 3 may be any clamp 3 disclosed in the prior art.

[0029] like Figure 2 As shown, the connecting assembly includes a fixed seat 4, a mounting cover 5, a clamping block 6 and a moving mechanism. The fixed seat 4 and the mounting cover 5 are respectively arranged at the opposite ends of the robot body 2 and the clamp 3, and positioning pieces are arranged on the opposite sides of the two. A cross groove 7 is opened on the end face of the fixed seat 4; the clamping block 6 is arranged in four groups in an L-shaped structure, and its vertical sections extend to the four strip sections in the cross groove 7 respectively, and its horizontal sections are engaged and connected with the mounting cover 5 when moving. A moving mechanism for driving the four groups of clamping blocks 6 to move synchronously is arranged in the fixed seat 4.

[0030] like Figure 2 and Figure 3As shown, the inner wall of the installation cover 5 is provided with four groups of slots 8 at equal intervals in a circumference, and the four groups of slots 8 are respectively engaged and connected with the four groups of clamping blocks 6 .

[0031] like Figure 2 and Figure 3 As shown, the positioning member includes a positioning block 9, and a plurality of groups of positioning blocks 9 are arranged on the end surface of the fixing seat 4. The inner wall of the mounting cover 5 is provided with a plurality of groups of positioning grooves 10 extending to the end surface thereof. The positioning block 9 and the corresponding positioning grooves 10 are interlaced and connected. Through the setting of the positioning member, when the mounting cover 5 is installed, the card slot 8 thereon is aligned with the card block 6 on the fixing seat 4.

[0032] Embodiment 2

[0033] like Figure 1-Figure 5 As shown, the utility model proposes a power-assisted mechanical arm. Based on the above embodiment, this embodiment also records in detail the specific components of the moving mechanism and the connection method between the moving mechanism and the clamping block 6.

[0034] like Figure 4 As shown, the moving mechanism includes a threaded rod 11, a bevel gear 12, a rotating shaft 13, a toothed disc 14 and a self-locking manual part. The threaded rod 11 is provided with four groups, which are rotatably connected in the strip segments of the cross groove 7 respectively. The four groups of threaded rods 11 are respectively threadedly connected with the four groups of blocks 6. The opposite ends of the four groups of threaded rods 11 are connected with the bevel gears 12. A rotating shaft 13 is rotatably provided in the fixed seat 4. One end of the rotating shaft 13 is connected with a toothed disc 14 extending to the bottom of the four groups of bevel gears 12. The toothed disc 14 is respectively meshed and connected with the four groups of bevel gears 12. A self-locking manual part for driving the rotating shaft 13 to rotate is provided in the middle of the rotating shaft 13.

[0035] like Figure 5 As shown, the self-locking manual part includes a worm wheel 15, a worm 16 and a handle 17. The worm wheel 15 is installed on the rotating shaft 13, and the worm 16 is connected to the inner side of the fixed seat 4 for transverse rotation. It is meshed with the turbine, and one end of the worm 16 passes through the fixed seat 4 and is connected to the handle 17.

[0036] The worm 16 is driven to rotate by the handle 17 , and the worm 16 meshes with the worm wheel 15 during the rotation process, thereby driving the rotating shaft 13 to rotate.

[0037] like Figure 4 As shown, a cross guide rod 18 is also provided in the cross groove 7 and is located above the threaded rod 11. The four groups of blocks 6 are all slidably connected to the cross guide rod 18. The moving direction of the blocks 6 is limited by the cross guide rod 18 to ensure the stability of their movement.

[0038] In summary, when the utility model is in use, when connecting the mechanical arm body 2 and the clamp 3, first align the positioning groove 10 on the mounting cover 5 at the end of the clamp 3 with the positioning block 9 on the fixing seat 4 and insert it, then turn the handle 17, the handle 17 drives the worm 16 to rotate, and the worm 16 engages with the worm wheel 15 during the rotation process, and then drives the rotating shaft 13 to rotate. When the rotating shaft 13 rotates, it drives the toothed disk 14 thereon to rotate, and the toothed disk 14 drives the four groups of threaded rods 11 to rotate synchronously by engaging with the bevel gear 12. When the threaded rod 11 rotates, it drives the block 6 thereon to move along the cross guide rod 18 from the center of the fixing seat 4 to the outside in a launching trajectory. During the movement, one end of the horizontal section thereof is inserted into the slot 8, thereby limiting the mounting cover 5, that is, completing the assembly between the mounting cover 5 and the fixing seat 4. When disassembly is required, the handle 17 is rotated in the opposite direction to a certain number of circles, which is easy to operate.

[0039] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A power-assisted mechanical arm, characterized in that: include A base (1) on which a mechanical arm body (2) is movably arranged, and a clamp (3) for clamping a workpiece is arranged at one end of the mechanical arm body (2); The connecting component is arranged between the mechanical arm body (2) and the clamp (3) and is used for detachably assembling the mechanical arm body (2) and the clamp (3).

2. The power-assisted mechanical arm according to claim 1, characterized in that: The connection assembly comprises a fixing seat (4), a mounting cover (5), a clamping block (6) and a moving mechanism. The fixing seat (4) and the mounting cover (5) are respectively arranged at opposite ends of the mechanical arm body (2) and the clamp (3). Positioning pieces are arranged on opposite sides of the two. A cross groove (7) is arranged on the end surface of the fixing seat (4). The card blocks (6) are arranged in four groups in an L-shaped structure, and their vertical sections extend into four strip sections in the cross groove (7) respectively. The horizontal sections are engaged and connected with the installation cover (5) when moving. A moving mechanism for driving the four groups of card blocks (6) to move synchronously is arranged in the fixed seat (4).

3. The power-assisted mechanical arm according to claim 2, characterized in that: The inner wall of the installation cover (5) is provided with four groups of card slots (8) at equal intervals in a circumference, and the four groups of card slots (8) are respectively engaged and connected with the four groups of card blocks (6).

4. The power-assisted mechanical arm according to claim 2, characterized in that: The positioning member comprises a positioning block (9), the end surface of the fixing seat (4) is provided with a plurality of groups of positioning blocks (9), the inner wall of the mounting cover (5) is provided with a plurality of groups of positioning grooves (10) extending to the end surface thereof, and the positioning blocks (9) and the corresponding positioning grooves (10) are interlaced and connected.

5. The power-assisted mechanical arm according to claim 2, characterized in that: The moving mechanism comprises a threaded rod (11), a bevel gear (12), a rotating shaft (13), a toothed disc (14) and a self-locking manual member. The threaded rod (11) is provided with four groups, which are respectively rotatably connected in the strip sections of the cross groove (7). The four groups of threaded rods (11) are respectively threadedly connected to the four groups of clamping blocks (6). The opposite ends of the four groups of threaded rods (11) are all connected to the bevel gear (12). A rotating shaft (13) is rotatably arranged in the fixed seat (4), one end of the rotating shaft (13) is connected to a toothed disc (14) extending below the four sets of bevel gears (12), the toothed disc (14) is meshedly connected with the four sets of bevel gears (12) respectively, and a self-locking manual part for driving the rotating shaft (13) to rotate is arranged in the middle part.

6. The power-assisted mechanical arm according to claim 5, characterized in that: The self-locking manual part comprises a worm wheel (15), a worm (16) and a handle (17). The worm wheel (15) is mounted on the rotating shaft (13). The worm (16) is rotatably connected to the inner side of the fixing seat (4) in a transverse manner and meshes with the turbine. One end of the worm (16) passes through the fixing seat (4) and is connected to the handle (17).

7. The power-assisted mechanical arm according to claim 5, characterized in that: A cross guide rod (18) is also arranged in the cross groove (7) and is located above the threaded rod (11). The four groups of clamping blocks (6) are all slidably connected to the cross guide rod (18).

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