CN212919447U

CN212919447U - Device of mechanical hand capable of being locked in two positions by unidirectional force

Info

Publication number: CN212919447U
Application number: CN202020703017.4U
Authority: CN
Inventors: 苏炜; 陈好学; 臧宾帮; 张彬
Original assignee: Shandong Broadcontrol Electromechanical Co ltd
Current assignee: Shandong Broadcontrol Electromechanical Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-04-09
Anticipated expiration: 2030-04-30

Abstract

The invention discloses a device of a manipulator locked in a two-position mode by unidirectional force, which comprises a base, wherein a sliding sleeve is fixed on the front side of the base, finger pulley supports are fixed on the upper side and the lower side of the sliding sleeve respectively, a mechanical finger is installed on the front side of each finger pulley support, a finger sliding groove is formed in the rear side of the mechanical finger, and the mechanical finger can move on the finger pulley supports along the finger sliding groove; the push rod is provided with a spring at the part of the base; the slide is the "F" shape circulation track of end to end. The structure can realize the opening and closing actions of the mechanical fingers only by pressing or pushing and pulling the head of the mechanical hand with simple single action.

Description

Device of mechanical hand capable of being locked in two positions by unidirectional force

Technical Field

The invention relates to the technical field of mechanical arms, in particular to a device of a mechanical arm capable of being locked in a two-position mode through unidirectional force exertion.

Background

At present, the fingers of mechanical arms of various robots, special equipment, electric tools and other mechanical equipment are generally driven by motors, cylinders, electromagnets and the like, but all need external power supplies, air sources and the like. In some special applications such as: the temporary grabbing (unhooking) device for equipment such as a movable trolley and rescue machinery, a device which is simple to operate and does not need external power and the like are needed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a device for a mechanical hand locked in a two-position mode by unidirectional force, so that the opening and closing actions of mechanical fingers can be realized only by pressing or pushing and pulling the head of the mechanical hand with a simple single action.

The invention is realized by the following technical scheme:

a device of a manipulator locked in a two-position mode by unidirectional force comprises a base, wherein a sliding sleeve is fixed on the front side of the base, finger pulley supports are fixed on the upper side and the lower side of the sliding sleeve respectively, a mechanical finger is installed on the front side of each finger pulley support, a finger sliding groove is formed in the rear side of the mechanical finger, and the mechanical finger can move on the finger pulley supports along the finger sliding groove; the mechanical fingers are provided with mounting holes, finger rotating shafts are mounted on the mounting holes, and the finger rotating shafts are connected through a connecting piece; a push rod is fixed on the rear side of the connecting piece, penetrates through the sliding sleeve and is connected with a pulley on the other side of the sliding sleeve, and the pulley is arranged in a slideway fixed on the base and can run in the slideway through the pulley; the push rod can axially reciprocate along the sliding sleeve; the push rod is provided with a spring at the part of the base; the slide way is an F-shaped circulating track connected end to end, and comprises a starting point a, a section b, a section c, an inflection point d, an inflection point e, a section F, an inflection point g, a section h, a section i and a bottom dead center j.

Preferably, the push rod comprises a main push rod and a connecting rod, the main push rod is fixedly connected with the connecting rod, the main push rod can reciprocate in the sliding sleeve, and the connecting rod is provided with a spring.

Preferably, a limiting block is fixed at the tail part of the main push rod.

Preferably, the connecting rod is made of rigid or elastic material.

Preferably, the connecting rod is provided with a stop block, and the spring is arranged between the limit block and the stop block

Preferably, the connecting rod is a non-elastic rod connected by two hinged shafts.

Preferably, the pulleys are two in number and are located on two sides of the connecting rod in mirror symmetry.

The invention has the beneficial effects that: the invention has simple structure, less material consumption and low cost, and can realize the opening and closing actions of the mechanical fingers only by pressing or pushing and pulling the head part of the mechanical hand with simple single action.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a front view of a device of a single-direction force double-position locking manipulator according to an embodiment of the invention.

Fig. 2-7 are schematic diagrams illustrating the operation of the single direction force double lock robot apparatus shown in fig. 1.

In the attached drawing, 1, a mechanical finger 2, a finger sliding groove 3, a finger pulley 4, a finger pulley bracket 5, a main push rod 6, a sliding sleeve 7, a spring 8, a stop 9, a two-position slideway 10, a base 11, a pulley 12, a connecting rod 13, a finger rotating shaft 14 and clamped materials.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Example 1

With reference to fig. 1-7, the device of the single-direction force-applying two-position locking manipulator of the present embodiment includes a base 10, a sliding sleeve 6 is fixed on the front side of the base 10, finger pulley supports 4 are fixed on both upper and lower sides of the sliding sleeve 6, a mechanical finger 1 is installed on the front side of the finger pulley support 4, an L-shaped finger sliding groove 2 is arranged on the rear side of the mechanical finger 1, and the mechanical finger can move on the finger pulley support 4 along the finger sliding groove 2; the mechanical finger 1 is provided with a mounting hole, the mounting hole is provided with a finger rotating shaft 13, and the finger rotating shafts 13 are connected through a connecting piece which can be a connecting rod or a connecting plate; a push rod is fixed on the rear side of the connecting piece, the push rod penetrates through the sliding sleeve 6 and is connected with a pulley 11 on the other side of the sliding sleeve 6, and the pulley 11 is installed in a slideway 9 fixed on a base 10 and can run in the slideway 9 through the pulley 11; the push rod can axially reciprocate along the sliding sleeve 6; the push rod is provided with a spring 12 at the part of the base; the slide way 9 is an F-shaped circulating track connected end to end, and comprises a starting point a, a section b, a section c, an inflection point d, an inflection point e, a section F, an inflection point g, a section h, a section i and a lower dead point j, when an external force F is applied to the push rod, the push rod starts from the starting point a along with the pulley, passes through the section b and the section c, and cannot run after reaching the inflection point d, the external force F is removed at the moment, the pulley stops running after rebounding to the inflection point e, and the mechanical fingers finish clamping action; and continuously applying the external force F, enabling the pulley to reach the inflection point g through the section F and then be incapable of moving, withdrawing the external force F again, enabling the pulley to return to the bottom dead center j through the sections h and i, then returning to the starting point a, and opening the mechanical finger at the moment.

In this embodiment, the push rod includes a main push rod 5 and a connecting rod 12, the main push rod 5 is fixedly connected with the connecting rod 12, the main push rod 5 can reciprocate in the sliding sleeve 6, and a spring is installed on the connecting rod. And a limiting block is fixed at the tail part of the main push rod. The connecting rod is made of rigid or elastic materials. The connecting rod is provided with a stop block, and the spring 12 is arranged between the limit block and the stop block. The two pulleys 11 are arranged on two sides of the connecting rod in a mirror symmetry mode.

As shown in fig. 1, the mechanical finger 1 may be made of a rigid or elastic material according to different applications, or an elastic mechanism may be added, or may be processed into different shapes according to different applications. When the main push rod 5 moves, the mechanical finger 1 can rotate around the finger rotating shaft 13, the finger pulley 3 on the finger pulley support 4 limits the movement track of the mechanical finger 1 in the finger sliding groove 2, the finger sliding groove 2 is of an L shape, the finger can be prevented from being influenced by the movement of the main push rod after the opening and closing degree of the finger is in place, and the clamping condition is avoided.

The main push rod 5 can reciprocate along the axial direction of the sliding sleeve 6, an elastic connecting rod 12 is fixed at the end part of the main push rod, the end part of the main push rod is connected with a pulley 11 through a stop block 8 in a cantilever way, and the pulley can only move in the double-position slideway 9. The dual position runner may be machined directly into the base 10 or the machined runner may be fixed to the base. In some relatively large size applications, the elastic linkage 12 may also be a non-elastic rod connected by two hinged shafts that are spring-return. The pulley 11 can be mounted in two double-position slideways, respectively in mirror symmetry and fixed connection, to increase and stabilize the pulley and resilient rod stresses.

The operation mode is as follows:

1) as shown in fig. 2, when the mechanical finger is stressed by a force F, the main push rod can move along the slide way in the sliding sleeve, the elastic rod pushes the pulley to move along the double-position slide way from the starting point a along the straight section b, and the length L of the straight section and the proportion of the length L to the size of the whole slide way are matched with the size of the finger sliding groove on the mechanical finger to obtain different clamping forces or finger opening degrees.

2) As shown in fig. 3, when the mechanical finger continues to be stressed and the elastic rod drives the pulley to reach the top dead center d of the clamping stroke along the section c of the two-position chute, the pulley stops moving.

3) As shown in fig. 4, when the elastic rod drives the pulley along the section d of the two-position chute, and after the external force is removed, the pulley reaches the dead point d of the clamping stroke by the resilience force of the elastic rod and the thrust of the spring 7, the pulley stops moving. The manipulator completes the clamping action.

4) As shown in fig. 5, when the clamped manipulator is stressed again in the direction F, the elastic rod drives the pulley to reach the upper stop point g of the reset stroke along the section F of the slide way, and then the pulley stops moving. The opening and closing angle of the fingers in the operation process is unchanged due to the special shape of the sliding groove on the mechanical finger in the section of the stroke.

5) As shown in fig. 6, when the external force F of the manipulator is removed, the pulley enters the h section and the i section of the slideway under the action of the elastic force of the elastic rod and the spring force. The spring pushes the main push rod to continue to return the pulley to move to a lower dead point j of the return stroke, as shown in fig. 7, then the pulley returns to a starting point a by the elastic force of the elastic rod, and the manipulator is completely opened.

Example 2

Based on the embodiment 1, the connecting rod 12 is a non-elastic rod connected by two hinged shafts, and in some relative large-size application occasions, the connecting rod 12 can also adopt a non-elastic rod connected by two hinged shafts and reset by a spring.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. The utility model provides a device of manipulator of one-way forceful dibit locking which characterized in that: the mechanical finger device comprises a base, wherein a sliding sleeve is fixed on the front side of the base, finger pulley supports are fixed on the upper side and the lower side of the sliding sleeve, a mechanical finger is installed on the front side of each finger pulley support, a finger sliding groove is formed in the rear side of the mechanical finger, and the mechanical finger can move on the finger pulley supports along the finger sliding groove; the mechanical fingers are provided with mounting holes, finger rotating shafts are mounted on the mounting holes, and the finger rotating shafts are connected through a connecting piece; a push rod is fixed on the rear side of the connecting piece, penetrates through the sliding sleeve and is connected with a pulley on the other side of the sliding sleeve, and the pulley is arranged in a slideway fixed on the base and can run in the slideway through the pulley; the push rod can axially reciprocate along the sliding sleeve; the push rod is provided with a spring at the part of the base; the slide way is an F-shaped circulating track connected end to end, and comprises a starting point a, a section b, a section c, an inflection point d, an inflection point e, a section F, an inflection point g, a section h, a section i and a bottom dead center j.

2. The apparatus of claim 1, wherein the robotic arm is locked in two positions by one-way force, and wherein: the push rod comprises a main push rod and a connecting rod, the main push rod is fixedly connected with the connecting rod, the main push rod can reciprocate in the sliding sleeve, and a spring is mounted on the connecting rod.

3. The apparatus of claim 2, wherein the robotic arm is locked in two positions by one-way force, and wherein: and a limiting block is fixed at the tail part of the main push rod.

4. A single direction force double position locking robot apparatus as claimed in claim 3, wherein: the connecting rod is made of rigid or elastic materials.

5. The apparatus of claim 4, wherein the robotic arm is locked in two positions by one-way force, and wherein: the connecting rod is provided with a stop block, and the spring is arranged between the limiting block and the stop block.

6. The apparatus of claim 2, wherein the robotic arm is locked in two positions by one-way force, and wherein: the connecting rod is a non-elastic rod connected by two sections of hinge shafts.

7. The apparatus of one-way forced double-position locking manipulator as claimed in any one of claims 2 to 6, wherein: the pulley has two, and mirror symmetry's both sides that are located the connecting rod.

8. The apparatus of claim 1, wherein the robotic arm is locked in two positions by one-way force, and wherein: the finger sliding groove is L-shaped.