CN110744480A

CN110744480A - Self-locking reducing manipulator

Info

Publication number: CN110744480A
Application number: CN201910921900.2A
Authority: CN
Inventors: 王艳萍
Original assignee: Da Yingke Nanjing Equipment Co Ltd
Current assignee: Liaoning Haihua Energy Equipment Group Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-02-04
Anticipated expiration: 2039-09-27
Also published as: CN112247545A; CN110744480B

Abstract

The invention discloses a self-locking reducing manipulator which comprises a base and a mechanical arm arranged on the base, wherein the free end of the mechanical arm is provided with a self-locking reducing wrench sleeve which comprises a screwing head, an outer sleeve fixedly connected with the screwing head, a floating seat, a tensioning mandrel and three clamps which are nested at the lower end of the floating seat in a sliding manner at intervals; the self-locking clamping jaw can realize self-locking and twice diameter-changing movement of the clamping jaw, can be suitable for screwing screws with different specifications, and has a more flexible structure; in addition, the inclined plane protrusion of the outer sleeve is matched with the inclined plane of the clamping jaw, so that the torsion of the outer sleeve is converted into the clamping force of the screw, the transmission of larger torque is realized, and the slipping phenomenon is avoided.

Description

Self-locking reducing manipulator

Technical Field

The invention relates to a self-locking reducing manipulator.

Background

The existing wrench socket can only be used for screwing screws of one specification, and the wrench sockets of different specifications need to be replaced aiming at screws of different specifications, so that the use is inconvenient, and the slip phenomenon is easy to occur when the wrench socket is used for screwing the screws.

Disclosure of Invention

The invention aims to overcome the defects and provide a self-locking reducing manipulator.

In order to achieve the purpose, the invention adopts the following specific scheme:

the self-locking reducing manipulator comprises a base and a mechanical arm arranged on the base, wherein a self-locking reducing wrench sleeve is arranged at the free end of the mechanical arm.

Self-locking reducing spanner sleeve includes revolves the head, with revolve first fixed connection's outer sleeve, float seat, taut dabber and three interval slip nested clamping jaw at unsteady seat lower extreme soon, outer sleeve is equipped with first centre bore, float the seat and be located the outer sleeve, and its upper end stretches into first centre bore and through oilless bearing and outer sleeve cooperation, float the seat and be equipped with the second centre bore, the one end of taut dabber stretches into in the second centre bore, the other end of taut dabber is equipped with the connection lug that third centre bore and corresponding clamping jaw set up, is equipped with contact and first spring in the third centre bore, the lower extreme of contact stretches out the setting of third centre bore, first spring both ends respectively with taut dabber, contact fixed connection, taut dabber still overlaps and is equipped with the second spring, the both ends of second spring respectively with float the seat, The connecting lug is abutted, the rigidity of the second spring is smaller than that of the first spring, the three chucks are hinged to the three connecting lugs through levers respectively, the inner wall of the outer sleeve is provided with inclined plane protrusions corresponding to the clamping jaws, the outer side walls of the clamping jaws are provided with inclined planes corresponding to the inclined plane protrusions in a matched mode, and when the outer sleeve rotates, the inclined plane protrusions of the outer sleeve are attached to the inclined planes of the clamping jaws and extrude the clamping jaws along the radial direction.

The surface of the inclined plane protrusion of the outer sleeve facing the axial direction is an arc surface, and the inclined plane of the clamping jaw is arranged as an arc inclined plane.

Wherein, the surface of the clamping jaw towards the axial direction of the tensioning mandrel is concave.

And a check ring is also embedded at the upper end of the floating seat and is positioned above the oilless bearing.

Wherein, the screwing head adopts a hexagonal head arrangement.

The invention has the beneficial effects that: compared with the prior art, the invention drives the first spring to jack the tensioning mandrel through the contact head, so that the tensioning mandrel drives the three clamping jaws to move towards the center, further preliminarily clamps the screw, then the inclined surface protrusion of the outer sleeve is attached to the inclined surface of the clamping jaw by rotating the outer sleeve, further the extrusion clamping jaw moves towards the center, further firmly clamps the screw, realizes self-locking, realizes twice diameter-changing movement of the clamping jaw, can be suitable for screwing screws with different specifications, and has more flexible structure; in addition, the inclined plane protrusion of the outer sleeve is matched with the inclined plane of the clamping jaw, so that the torsion of the outer sleeve is converted into the clamping force of the screw, the transmission of larger torque is realized, and the slipping phenomenon is avoided.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a perspective view of a self-locking reducing wrench socket provided in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a self-locking reducing wrench socket provided in accordance with an embodiment of the present invention;

FIG. 4 is a bottom view of a self-locking reducing wrench socket provided in accordance with an embodiment of the present invention;

FIG. 5 is a partial schematic structural view of a self-locking reducing wrench socket according to an embodiment of the present invention;

FIG. 6 is a schematic view of a tensioning mandrel and jaw configuration provided by an embodiment of the present invention;

FIG. 7 is a schematic structural view of an outer sleeve provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of a jaw configuration provided by an embodiment of the present invention;

FIG. 9 is a schematic structural view of another perspective of a clamping jaw provided by an embodiment of the present invention;

FIG. 10 is a schematic structural view of a floating seat provided by an embodiment of the present invention;

FIG. 11 is a schematic structural view of a tensioning mandrel provided by an embodiment of the present invention;

description of reference numerals: a-a mechanical arm;

1-screwing head; 2-an outer sleeve; 21-a first central hole; 22-a beveled protrusion; 3-a floating seat; 31-a second central hole; 4-tensioning the mandrel; 41-third central hole; 42-attachment lugs; 5-clamping jaw; 51-inclined plane; 6-oilless bearing; 7-contact head; 8-a first spring; 9-a second spring; 10-a retainer ring.

Detailed Description

The invention will be described in further detail with reference to the following figures and specific examples, without limiting the scope of the invention.

As shown in fig. 1 to 11, the self-locking reducing manipulator according to the embodiment includes a base and a mechanical arm a disposed on the base, and a self-locking reducing wrench socket is disposed at a free end of the mechanical arm.

The variable diameter wrench comprises a screwing head 1, an outer sleeve 2 fixedly connected with the screwing head 1, a floating seat 3, a tensioning mandrel 4 and clamping jaws 5 nested at the lower end of the floating seat 3 at intervals in a sliding manner, wherein the outer sleeve is provided with a first center hole 21, the floating seat 3 is positioned in the outer sleeve 2, the upper end of the floating seat extends into the first center hole 21 and is matched with the outer sleeve 2 through an oilless bearing 6, the floating seat 3 is provided with a second center hole 31, one end of the tensioning mandrel 4 extends into the second center hole 31, the other end of the tensioning mandrel 4 is provided with a third center hole 41 and a connecting lug 42 corresponding to the clamping jaw 5, a contact head 7 and a first spring 8 are arranged in the third center hole 41, the lower end of the contact head 7 extends out of the third center hole 41, two ends of the first spring 8 are respectively fixedly connected with the tensioning mandrel 4 and the contact head 7, the tensioning mandrel 4 is further sleeved with a second spring 9, the two ends of the second spring 9 are respectively abutted against the floating seat 3 and the connecting lugs 42, the rigidity of the second spring 9 is smaller than that of the first spring 8, the three chucks are respectively hinged with the three connecting lugs 42 through levers, the inner wall of the outer sleeve 2 is provided with inclined plane protrusions 22 corresponding to the clamping jaws 5, the outer side wall of the clamping jaw 5 is provided with inclined planes 51 corresponding to the inclined plane protrusions 22 in a matching manner, and when the outer sleeve 2 rotates, the inclined plane protrusions 22 of the outer sleeve 2 abut against the inclined planes 51 of the clamping jaws 5 and extrude the clamping jaws 5 along the radial direction.

When the device is used, the outer sleeve 2 is extended downwards until the contact head 7 is contacted with the top surface of the screw, at the moment, the first spring 8 is higher than the second spring 9 in rigidity, the first spring 8 jacks up the tensioning mandrel 4, so that the tensioning mandrel 4 moves upwards, the tensioning mandrel 4 drives the three clamping jaws 5 to approach to the center through the lever, and the outer wall of the screw is clamped, so that the screw is preliminarily clamped; after the clamping jaw 5 clamps the screw, the outer sleeve 2 is driven to rotate through the screwing head 1, the inclined plane protrusion 22 of the outer sleeve 2 is in contact with the inclined plane 51 of the clamping jaw 5, the inclined plane protrusion 22 of the outer sleeve 2 extrudes the clamping jaw 5 under the action of torsion, the clamping jaw 5 is ejected out towards the center, and the screw is further and firmly clamped, at the moment, the outer sleeve 2, the clamping jaw 5 and the floating seat 3 are rigidly connected together to realize the self-locking function, then the screwing head 1 is continuously screwed, and the outer sleeve 2 transmits the screwing torque to the screw, so that the screw is screwed.

In the embodiment, the contact head 7 drives the first spring 8 to jack the tensioning mandrel 4, so that the tensioning mandrel 4 drives the three clamping jaws 5 to move towards the center, and further primarily clamps the screw, and then the outer sleeve 2 is rotated to enable the inclined plane protrusion 22 of the outer sleeve 2 to be attached to the inclined plane 51 of the clamping jaw 5, so that the clamping jaw 5 is extruded to further move towards the center, further and firmly clamp the screw, self-locking is realized, two times of reducing movement of the clamping jaw 5 are realized, the screw tightening device can be suitable for screw tightening of different specifications, and the structure is more flexible; in addition, the inclined plane protrusion 22 of the outer sleeve 2 is matched with the inclined plane 51 of the clamping jaw 5, so that the torsion of the outer sleeve 2 is converted into the clamping force of the screw, the transmission of larger moment is realized, the slipping phenomenon is avoided, and the device is small in size, light in weight, full in mechanical structure, efficient and reliable.

In the present embodiment, as shown in fig. 4 and 7, the surface of the inclined surface protrusion 22 of the outer sleeve 2 facing the axial direction is a circular arc surface, and as shown in fig. 3 and 8, the inclined surface 51 of the clamping jaw 5 is a circular arc inclined surface 51, which is beneficial for the inclined surface protrusion 22 of the outer sleeve 2 to match with the inclined surface 51 of the clamping jaw 5, so that the pressing force of the outer sleeve 2 to the clamping jaw 5 is concentrated in the radial direction, and the clamping is firmer.

In this embodiment, as shown in fig. 7, the surface of the clamping jaw 5 facing the axial direction of the tightening mandrel 4 is concave, which is more beneficial for clamping screws, and can effectively prevent the occurrence of slipping phenomenon when the screws are tightened.

In this embodiment, as shown in fig. 3 and 5, a retaining ring 10 is further embedded in the upper end of the floating seat 3, and the retaining ring 10 is located above the oilless bearing 6, so as to further ensure that the floating seat 3 is connected with the outer sleeve 2 more firmly.

In this embodiment, the screwing head 1 is a hexagonal head, which is suitable for more external screwing tools and can transmit larger torque.

The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present patent application are included in the protection scope of the present patent application.

Claims

1. The self-locking reducing manipulator is characterized by comprising a base and a mechanical arm (a) arranged on the base, wherein a self-locking reducing wrench sleeve is arranged at the free end of the mechanical arm.

2. The self-locking reducing manipulator according to claim 1, wherein the reducing wrench comprises a screwing head (1), an outer sleeve (2) fixedly connected with the screwing head (1), a floating seat (3), a tensioning mandrel (4) and three clamping jaws (5) which are slidably nested at the lower end of the floating seat (3) at intervals, the outer sleeve is provided with a first central hole (21), the floating seat (3) is positioned in the outer sleeve (2), the upper end of the floating seat extends into the first central hole (21) and is matched with the outer sleeve (2) through an oilless bearing (6), the floating seat (3) is provided with a second central hole (31), one end of the tensioning mandrel (4) extends into the second central hole (31), the other end of the tensioning mandrel (4) is provided with a third central hole (41) and a connecting lug (42) corresponding to the clamping jaw (5), be equipped with contact head (7) and first spring (8) in third centre bore (41), the lower extreme of contact head (7) stretches out third centre bore (41) and sets up, first spring (8) both ends respectively with taut dabber (4), contact head (7) fixed connection, taut dabber (4) still overlaps and is equipped with second spring (9), the both ends of second spring (9) respectively with float seat (3), connection lug (42) top lean on, the rigidity of second spring (9) is less than the rigidity of first spring (8), three the chuck is articulated with three connection lug (42) through the lever respectively, the inner wall of outer sleeve (2) corresponds clamping jaw (5) and is provided with inclined plane protrusion (22), the lateral wall of clamping jaw (5) corresponds inclined plane protrusion (22) cooperation and is provided with inclined plane (51), when outer sleeve (2) rotates, the inclined plane protrusion (22) of the outer sleeve (2) is abutted against the inclined plane (51) of the clamping jaw (5) and presses the clamping jaw (5) along the radial direction.

3. A self-locking variable-diameter manipulator according to claim 1, wherein the surface of the inclined surface protrusion (22) of the outer sleeve (2) facing the axial direction is a circular arc surface, and the inclined surface (51) of the clamping jaw (5) is a circular arc inclined surface (51).

4. A self-locking reducing manipulator according to claim 1, wherein the surface of the clamping jaw (5) facing the axial direction of the tightening mandrel (4) is concave.

5. The self-locking variable-diameter manipulator as claimed in claim 1, wherein a retainer ring (10) is embedded in the upper end of the floating seat (3), and the retainer ring (10) is located above the oilless bearing (6).

6. The self-locking variable-diameter manipulator according to claim 1, wherein the screwing head (1) is arranged in a hexagonal head mode.

7. The self-locking variable-diameter manipulator according to claim 1, wherein the screwing head (1) is arranged in a hexagonal head mode.

8. The self-locking variable-diameter manipulator according to claim 1, wherein the screwing head (1) is arranged in a hexagonal head mode.