CN216913903U

CN216913903U - Buffer device for mechanical arm

Info

Publication number: CN216913903U
Application number: CN202220256191.8U
Authority: CN
Inventors: 杨化龙; 张艾; 孙崇书; 赵昕; 罗萌; 贾玉秋
Original assignee: Penglai Jutal Offshore Engineering Heavy Industries Co ltd
Current assignee: Penglai Jutal Offshore Engineering Heavy Industries Co ltd
Priority date: 2022-02-08
Filing date: 2022-02-08
Publication date: 2022-07-08
Anticipated expiration: 2032-02-08

Abstract

The utility model relates to the technical field of mechanical arms, in particular to a buffer device for a mechanical arm, which comprises a pushing assembly and two buffer discs symmetrically arranged on a supporting arm, wherein the inner sides of the buffer discs are provided with buffer assemblies; the pushing assembly is fixed on the movable arm; the buffer component can play a buffer role in the pushing component. Because the promotion subassembly can rotate along with the digging arm is synchronous, consequently, when the digging arm receives external force to influence, play cushioning effect to two directions about the digging arm, two directions anticlockwise and clockwise play cushioning effect promptly of digging arm.

Description

Buffer device for mechanical arm

Technical Field

The utility model relates to the technical field of mechanical arms, in particular to a buffer device for a mechanical arm.

Background

The mechanical arm is a complex system with high precision, multiple inputs and multiple outputs, high nonlinearity and strong coupling, and consists of a visual sensor, a mechanical arm system and a main control computer, wherein the mechanical arm system comprises a modularized mechanical arm and a flexible hand, and the mechanical arm system is widely applied to the fields of industrial assembly, safety, explosion prevention and the like due to the unique operation flexibility.

In the prior art, when the mechanical arm works, the movable arm is suddenly collided by the outside or pressed, so that the driving element inside is easily damaged, and the protection effect on internal parts is not ideal enough.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and shortcomings in the prior art, and provides a buffer device for a mechanical arm, which can buffer a movable arm when the movable arm is suddenly collided or pressed by the outside.

In order to achieve the purpose, the utility model provides a buffer device for a mechanical arm, which comprises a pushing component 5 and two buffer discs symmetrically arranged on a supporting arm, wherein the inner sides of the buffer discs are provided with buffer components; the pushing assembly is fixed on the movable arm; the buffer assembly can play a role in buffering the pushing assembly.

Furthermore, the buffer assembly comprises a circular arc-shaped piston rod and a cylinder barrel with an inner cavity; one end of the piston rod is provided with a piston, and the other end of the piston rod is fixed on the pushing assembly; the piston is in sliding seal fit with the inner cavity of the cylinder barrel, and the piston rod is in sliding seal fit with the cylinder barrel; two ends of the inner cavity are hermetically communicated with an oil tank through an oil guide block with a through hole, and the oil tank is hermetically arranged on the buffer disc; the arc center line of the piston rod is superposed with the rotation axis of the movable arm.

Furthermore, an annular groove is formed in the inner side of the buffer disc, and the center line of the annular groove is overlapped with the rotation axis of the movable arm; the piston rod and the cylinder barrel are both arranged in the annular groove.

Furthermore, the pushing assembly comprises a pushing plate, the pushing plate is fixed on the movable arm through a fixing plate, and the end part of the piston rod is fixed at the end part of the pushing plate.

Further, the pushing assembly comprises a push plate, the push plate is fixed on the movable arm through a fixing plate, the end portion of the push plate is in sliding fit with the annular groove, and the end portion of the piston rod is fixed at the end portion of the push plate.

Furthermore, the number of the pushing assemblies is 2, the pushing assemblies further comprise fixed hoops, the fixed hoops are arranged at the bottoms of the fixed plates, connecting plates are arranged on two sides of the fixed hoops, and the two fixed hoops are in butt joint with and tightly wrapped on the movable arms through the connecting plates.

Further, the buffering assembly further comprises an adjusting assembly, and the adjusting assembly is used for adjusting the oil speed of the through hole in the oil guide block (64).

Furthermore, the adjusting assembly comprises a connecting rod, two ends of the connecting rod are provided with sliding blocks, and the sliding blocks are in sliding sealing fit with the oil guide blocks; the sliding block can shield the through hole in the oil guide block; a screw rod is connected to the middle of the connecting rod in a threaded manner, a knob is arranged at one end of the screw rod and located on the outer side of the buffer disc, and the knob is attached to the buffer disc; the screw rod is parallel to the rotation axis of the movable arm.

Further, the bottom of buffer disc is provided with the mounting panel, the mounting panel is fixed through a plurality of bolt A on the support arm.

Compared with the prior art, the utility model has the beneficial effects that: through rotating adjust knob, the screw rod drives the slider and removes, thereby change the size of leading the inside through-hole cross-section of oil cake, and then can change the speed that oil passes through the oil cake, consequently, effectively adjust the buffer strength according to the demand, improve the flexibility of using, and when the digging arm receives external force influence, the buffering subassembly can be followed the digging arm and played the cushioning effect anticlockwise and clockwise two directions, improve buffering effect, play fine guard action to inside spare part. Simultaneously, the buffer disc easy dismounting improves the convenience of maintenance.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the pushing assembly in the figure.

FIG. 3 is a schematic structural diagram of a cushion assembly according to the present invention.

Fig. 4 is a schematic structural view of the adjusting assembly in fig. 3.

Wherein: 1. a support arm; 2. a movable arm; 3. a buffer tray; 4. mounting a plate; 5. a pushing assembly; 6. a buffer assembly; 7. a bolt A; 31. an annular groove; 51. pushing the plate; 52. a fixing plate; 53. a bolt B; 54. a fixing hoop; 55. a connecting plate; 61. a piston rod; 62. a piston; 63. a cylinder barrel; 64. an oil guide block; 65. an adjustment assembly; 511. a boss; 651. a connecting rod; 652. a slider; 653. a screw; 654. a knob.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Example 1

Referring to fig. 1 to 4, the present invention provides a buffer device for a robot arm, comprising a pushing assembly 5 and two buffer discs 3 symmetrically arranged on a supporting arm 1, wherein the inner sides of the buffer discs 3 are provided with buffer assemblies 6; the pushing component 5 is fixed on the movable arm 2; the buffer assembly 6 can play a role of buffering the pushing assembly 5. Because the pushing assembly 5 can synchronously rotate along with the movable arm 2, the buffering effect specifically means that when the movable arm 2 is influenced by external force, the buffering effect is achieved from the upper direction and the lower direction of the movable arm 2, namely, the buffering effect is achieved from the two directions of the movable arm 2, namely, the anticlockwise direction and the clockwise direction.

Preferably, the damping assembly 6 comprises a circular arc-shaped piston rod 61 and a cylinder 63 with an inner cavity; one end of the piston rod 61 is provided with a piston 62, and the other end is fixed on the pushing component 5; the piston 62 is in sliding sealing fit with the inner cavity of the cylinder 63, and the piston rod 61 is in sliding sealing fit with the cylinder 63; the two ends of the inner cavity are hermetically communicated with an oil tank 66 through an oil guide block 64 with a through hole, and the oil tank 66 is hermetically arranged on the buffer disc 3; the arc center line of the piston rod 61 coincides with the rotation axis of the movable arm 2.

Preferably, the pushing assembly 5 comprises a pushing plate 51, the pushing plate 51 is fixed on the movable arm 2 through a fixing plate 52, and the end of a piston rod 61 is fixed on the end of the pushing plate 51.

Specifically, the push plate 51 and the fixed plate 52 are connected by a plurality of bolts B53.

Preferably, the bottom of the buffer disk 3 is provided with a mounting plate 4, and the mounting plate 4 is fixed to the support arm 1 by a plurality of bolts a 7.

Example 2

Based on the above embodiment 1, the difference is that the inner side of the buffer disc 3 is provided with the annular groove 31, and the center line of the annular groove 31 coincides with the rotation axis of the movable arm 2; the piston rod 61 and the cylinder 63 are both disposed in the annular groove 31.

Preferably, the pushing assembly 5 comprises a pushing plate 51, the pushing plate 51 is fixed on the movable arm 2 through a fixing plate 52, an end of the pushing plate 51 is slidably fitted with the annular groove 31, and an end of a piston rod 61 is fixed on an end of the pushing plate 51.

Specifically, the end of the push plate 51 is provided with a boss 511, the boss 511 is slidably fitted into the annular groove 31, and the end of the piston rod 61 is fixed to the boss 511.

Example 3

Based on the above embodiment 1 or embodiment 2, the difference is that the number of the pushing assemblies 5 is 2, the pushing assemblies 5 further include a fixed hoop 54, the fixed hoop 54 is disposed at the bottom of the fixed plate 52, the fixed hoop 54 is provided with a connecting plate 55 at both sides, and the two fixed hoops 54 are butted and tightly wrapped on the movable arm 2 through the connecting plate 55.

When in use, the cylinder 63 is filled with oil. The number of the pushing assemblies 5 is 2, and the following combinations can be provided: when the two piston rods 61 are connected to the same push plate 51, the two piston rods 61 may be on the same side or different sides with respect to the push plate 51; when one piston rod 61 is connected to one push plate 51 and the other piston rod 61 is connected to the other push plate 51, the two piston rods 61 may be on the same side or different sides with respect to the push plates 51. Details are not repeated.

Preferably, the two piston rods 61 are connected to the same push plate 51 on the same side.

Preferably, the damping assembly 6 further comprises an adjusting assembly 65, and the adjusting assembly 65 is used for adjusting the through hole oil speed in the oil guide block 64.

Preferably, the adjusting assembly 65 comprises a connecting rod 651, two ends of the connecting rod 651 are provided with sliding blocks 652, and the sliding blocks 652 are in sliding sealing fit with the oil guide blocks 64; the slider 652 can block the through hole in the oil guide block 64; a screw 653 is connected to the middle of the connecting rod 651 through a thread, a knob 654 is arranged at one end of the screw 653, the knob 654 is located at the outer side of the buffer disc 3, and the knob 654 is attached to the buffer disc 3; the screw 653 is parallel to the axis of rotation of the movable arm 2.

The adjusting assembly 65 uses the principle of a cylinder, and oil in the oil tank 66 enters the inner cavity of the cylinder barrel 63 to perform a buffering function. In addition, through rotating knob 654, knob 654 rotates and drives screw 653 and rotate, and screw 653 rotates and drives connecting rod 651 and remove, and connecting rod 651 removes and drives slider 652 and remove, and slider 652 shelters from the through-hole in leading the oil cake 64 to change the through-hole cross-section size in leading the oil cake 64, thereby can change the speed that oil passed through, effectively adjust buffer strength according to the demand, improve the flexibility of using.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The above-described embodiments of the utility model are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims, and not by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The buffer device for the mechanical arm is characterized by comprising a pushing assembly (5) and two buffer discs (3) symmetrically arranged on a supporting arm (1), wherein the inner sides of the buffer discs (3) are provided with buffer assemblies (6); the pushing assembly (5) is fixed on the movable arm (2); the buffer component (6) can buffer the pushing component (5);

the buffer assembly (6) comprises a circular arc-shaped piston rod (61) and a cylinder barrel (63) with an inner cavity; one end of the piston rod (61) is provided with a piston (62), and the other end of the piston rod is fixed on the pushing assembly (5); the piston (62) is in sliding sealing fit with an inner cavity of the cylinder barrel (63), and the piston rod (61) is in sliding sealing fit with the cylinder barrel (63); two ends of the inner cavity are hermetically communicated with an oil tank (66) through an oil guide block (64) with a through hole, and the oil tank (66) is hermetically arranged on the buffer disc (3); the arc center line of the piston rod (61) is superposed with the rotation axis of the movable arm (2).

2. A damping device according to claim 1, characterized in that the inner side of the damping disc (3) is provided with an annular groove (31), the centre line of the annular groove (31) coinciding with the axis of rotation of the movable arm (2); the piston rod (61) and the cylinder barrel (63) are arranged in the annular groove (31).

3. A buffer device according to claim 1, wherein the pushing assembly (5) comprises a pushing plate (51), the pushing plate (51) is fixed on the movable arm (2) through a fixing plate (52), and the end of the piston rod (61) is fixed on the end of the pushing plate (51).

4. A buffer device according to claim 2, wherein said pushing assembly (5) comprises a pushing plate (51), said pushing plate (51) is fixed on said movable arm (2) by a fixing plate (52), the end of said pushing plate (51) is slidably fitted with said annular groove (31), and the end of said piston rod (61) is fixed on the end of said pushing plate (51).

5. A buffer device according to claim 3 or 4, wherein the number of the pushing assemblies (5) is 2, the pushing assemblies (5) further comprise a fixed hoop (54), the fixed hoop (54) is arranged at the bottom of the fixed plate (52), two sides of the fixed hoop (54) are provided with connecting plates (55), and the two fixed hoops (54) are butted and tightly wrapped on the movable arm (2) through the connecting plates (55).

6. The damping device according to claim 5, characterized in that the damping assembly (6) further comprises an adjusting assembly (65), the adjusting assembly (65) being adapted to adjust the through-hole oil velocity in the oil guide block (64).

7. The damping device according to claim 6, characterized in that the adjusting assembly (65) comprises a connecting rod (651), both ends of the connecting rod (651) are provided with sliders (652), and the sliders (652) are in sliding sealing fit with the oil guide block (64); the sliding block (652) can shield a through hole in the oil guide block (64); a screw rod (653) is connected to the middle of the connecting rod (651) in a threaded manner, one end of the screw rod (653) is provided with a knob (654), the knob (654) is positioned on the outer side of the buffer disc (3), and the knob (654) is attached to the buffer disc (3); the screw rod (653) is parallel to the rotation axis of the movable arm (2).

8. A damping device according to claim 1, characterized in that the bottom of the damping disc (3) is provided with a mounting plate (4), which mounting plate (4) is fixed to the support arm (1) by means of a number of bolts a (7).