CN212601899U

CN212601899U - Clamping jaw with high driving precision

Info

Publication number: CN212601899U
Application number: CN202020425991.9U
Authority: CN
Inventors: 傅峰峰; 江志强; 刘楚奇; 陈伟俊
Original assignee: Guangzhou Fugang Wanjia Intelligent Technology Co Ltd
Current assignee: Guangzhou Fugang Life Intelligent Technology Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2021-02-26
Anticipated expiration: 2030-03-27

Abstract

The utility model provides a clamping jaw that drive accuracy is high, carry out articulated arm lock through the hinge including drive arrangement and rear end, drive arrangement drive arm lock winds the hinge rotates, and drive arrangement includes screw-nut mechanism, and nut or lead screw axial displacement drive arm lock rotate the clamping around the hinge. The screw rod and the nut can be precisely meshed, so that the nut or the screw rod can more easily perform axial movement with a small distance, the clamping arms are driven to rotate around the hinge shaft at a small angle to clamp, the driving precision is high, and the small objects can be clamped and not crushed when being clamped.

Description

Clamping jaw with high driving precision

Technical Field

The utility model relates to a clamping jaw, especially the clamping arm can be buckled and hold the clamping jaw that the drive precision of work piece is high.

Background

At present, reference is made to the U.S. patent publication No. US20140265401a1 in the prior art, and fig. 1 to 3 in the present application are attached to the drawings, as shown in the drawings: there are two gears, and two arm lock are installed respectively on the gear, and every gear is furnished with the threaded rod, threaded rod and gear engagement, and the threaded rod rotation drives the gear and rotates to the mode that the drive arm lock was close to each other and was kept away from each other rotates. When holding relatively fragile small articles such as bowls, cups and the like, a high degree of drive precision is required to both clamp and uncrush the article.

The defects of the prior art are as follows: the gear has a large pitch due to the process, so the gear cannot be precisely meshed with a threaded rod, the driving precision is low, and the small-angle rotation of the gear is difficult to control, so the gear cannot clamp small articles and cannot clamp small articles.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a clamping jaw with high driving precision, which can clamp small articles and not clamp broken small articles when clamping small articles.

The clamping jaw with high driving precision comprises a driving device and a clamping arm, wherein the rear end of the clamping arm is hinged through a hinge shaft, the driving device drives the clamping arm to rotate around the hinge shaft, the driving device comprises a screw rod nut mechanism, and a nut or a screw rod moves axially to drive the clamping arm to rotate around the hinge shaft to clamp.

Furthermore, the clamping arm comprises a front arm, a rear arm and an outer arm which are arranged in parallel, the near ends of the rear arm and the outer arm are respectively provided with a first hinge shaft and a third hinge shaft, the first hinge shaft is used as the hinge shaft, the far ends of the rear arm and the outer arm are connected to the front arm, and the rear arm and the outer arm can respectively rotate; the nut or the screw rod moves axially to drive the outer arm to rotate around the first hinge shaft so as to drive the clamping arm to rotate and clamp.

Further, the third hinge shaft is provided with a torsion spring, and the torsion spring applies force to the rear arm to enable the rear arm to rotate.

Further, the outer arm comprises an outer short arm and an outer long arm, the far ends of the outer long arm and the rear arm are hinged to different points of the front arm, the far end of the outer short arm is provided with a second hinge shaft and is hinged to the near end of the outer long arm through the second hinge shaft, the first hinge shaft is located on the outer short arm, and the nut or the lead screw moves axially to drive the outer short arm to rotate around the first hinge shaft to drive the clamping arm to rotate and clamp.

Furthermore, the screw rod nut mechanism is provided with a pulling arm, the near end of the pulling arm is hinged on one of the nut or the screw rod which moves axially, and the far end of the pulling arm is provided with a fourth hinge shaft and is hinged on the near end of the outer short arm through the fourth hinge shaft.

Furthermore, a rear extension part extends from the proximal end of the outer short arm to the direction far away from the distal end of the outer short arm, and a fourth hinge shaft of the pull arm is hinged on the proximal end of the rear extension part.

Has the advantages that: the screw rod and the nut can be precisely meshed, so that the nut or the screw rod can more easily perform axial movement with a small distance, the clamping arms are driven to rotate around the hinge shaft at a small angle to clamp, the driving precision is high, and the small objects can be clamped and not crushed when being clamped.

Drawings

FIG. 1 is a schematic view of a single-sided forearm of a prior art high-drive precision jaw;

FIG. 2 is a general schematic view of a prior art high drive precision jaw;

FIG. 3 is a schematic view of a prior art high drive precision clamping jaw clamping a workpiece;

FIG. 4 is a front arm of the present invention and a jaw of the prior art having a high driving precision, which have the same structure;

fig. 5 is an overall schematic view of a forearm of a high-precision driving jaw according to the present invention;

fig. 6 is a schematic view of the force application arm of the high-driving-precision clamping jaw of the present invention;

fig. 7 is a schematic view of the high-driving-precision opened state of the clamping jaw of the present invention;

fig. 8 is a schematic view of the clamping jaw clamping state with high driving precision of the utility model;

fig. 9 is a schematic view of the high-driving-precision retracted state of the clamping jaw of the present invention;

fig. 10 is a schematic perspective view of the clamping jaw with high driving precision according to the present invention;

fig. 11 is another schematic perspective view of the clamping jaw with high driving precision according to the present invention;

in the figure: 102. a rear arm; 104. an outer short arm; 105. an outer long arm; 108. a first hinge shaft; 109. a second hinge shaft; 123. a torsion spring; 132. a forearm; 20. a rear extension; 21. a third hinge shaft; 23. a shaft hole; 40. a light-emitting electric element; 41. a first threading hole; 42. a second threading hole; 51. a tension arm; 52. a fourth hinge shaft; 53. a lifting nut; 54. a screw rod; 60. a front hinge shaft.

Detailed Description

The utility model provides a clamping jaw that drive precision is high, including clamping jaw main part and two arm lock. Fig. 4 shows the same portion of the clamping arm of the present invention as the clamping arm of the prior art, the clamping arm includes a front arm 132, a rear arm 102 and an outer arm, the rear arm 102 and the outer arm are arranged side by side along the width direction of the two with a gap left therebetween, the distal ends of the two are provided with front hinge shafts 60, the rear arm 102 and the outer arm are respectively hinged on different points of the front arm 132 through the respective front hinge shafts 60, the proximal ends of the two are respectively provided with a third hinge shaft 21 and a first hinge shaft 108, the rear arm 102 is provided with a torsion spring 123 for the third hinge shaft 21, and the third hinge shaft 21 and the first hinge shaft 108 are arranged in the clamping jaw body; the outer arm comprises an outer short arm 104 and an outer long arm 105, the proximal end of the outer long arm 105 is hinged to the distal end of the outer short arm 104 by a second hinge shaft 109, and the first hinge shaft 108 is located at the proximal end of the outer short arm 104. The difference between the clamp arm of the present invention and the clamp arm of the prior art is shown in fig. 5 and 6, the proximal end of the outer short arm 104 extends to a rear extension portion 20 in a direction away from the distal end of the outer short arm 104, and the distal end of the rear extension portion 20 passes by the third hinge shaft 21 of the rear arm 102; the first hinge shaft 108 is located between the second hinge shaft 109 and the third hinge shaft 21. As shown in fig. 7, a motor and a lead screw 54 nut mechanism are arranged in the jaw body, the motor drives the lead screw 54 to rotate, so that the lifting nut 53 is lifted along the axial direction of the lead screw 54, two pulling arms 51 are respectively arranged on two sides of the lifting nut 53, the proximal ends of the two pulling arms 51 are respectively hinged on two sides of the lifting nut 53, the distal ends of the two pulling arms 51 are respectively provided with two fourth hinge shafts 52, and the distal ends of the two pulling arms 51 are hinged on the proximal ends of the rear extension parts 20 of the two outer short arms 104 through the respective fourth hinge shafts 52. It should be noted that the nut 53 may not be moved up and down, and the screw 54 may be moved up and down by rotating the nut 53.

Referring to fig. 7 to 8, taking the clamping arm on the left as an example, the working principle is as follows: the motor drives the lifting nut 53 to ascend, so that the tension arm 51 applies tension to the rear extension portion 20 of the outer short arm 104, the outer short arm 104 rotates anticlockwise around the first hinge shaft 108, the outer long arm 105 is applied with force, so that the outer long arm 105 rotates and clamps, meanwhile, the torsion spring 123 applies torsion to the rear arm 102, so that the rear arm 102 rotates and clamps, and the front arm 132 is driven by the rear arm 102 and the outer long arm 105 to rotate and clamp. When the rear arm 102 clamps the workpiece, the lifting nut 53 continues to ascend, so that the outer arm and the front arm 132 continue to rotate and clamp, the rear arm 102 is blocked by the workpiece so that the rear arm does not move, and the outer short arm 104 pushes the front arm 132 to rotate rightwards through the outer long arm 105, so that the workpiece is held. If the arms are rotated to clamp without gripping the workpiece, the arms are in the condition shown in figure 9, with the front arms 132 of the two arms remaining parallel to each other at all times during the rotational clamping of the two arms.

The utility model also provides a clamping jaw with a built-in wire, as shown in fig. 10 and fig. 11, a concave part is arranged on one side of the front arm 132 away from the clamping side, the concave part is provided with a light-transmitting shell, and the light-transmitting shell is arranged on the concave part in a magnetic attraction manner; the recessed portion is provided with a luminous electric element 40, the main body of the clamping jaw is provided with a power supply device, the luminous electric element 40 is connected with the power supply device through a lead to obtain electricity, and the power supply device is a battery or a transformer for obtaining electricity from commercial power. The specific threading structure is as follows: the proximal end of the front arm 132 is provided with a first threading hole 41, and the first threading hole 41 is provided between the front hinge shafts 60 of the rear arm 102 and the outer arm. The wires of the luminous electric element 40 penetrate into the first threading hole 41 from the side wall of the concave part, and the wires penetrating out of the first threading hole 41 reach the gap between the outer arm and the rear arm 102; referring to fig. 6, a shaft hole 23 is formed through the middle of the outer short arm 104, a first hinge shaft 108 located at the proximal end of the outer short arm 104 is inserted into the shaft hole 23, the length of the shaft hole 23 exceeds the length of the first hinge shaft 108, and a second threading hole 42 is formed in the shaft hole 23 beyond the length of the first threading hole. As shown in fig. 10 and 11, the outer short arm 104 is provided with a second threading hole 42 penetrating through the shaft hole 23, a wire penetrates into the second threading hole 42 from a gap between the outer arm and the rear arm 102, and the wire penetrating out of the second threading hole 42 is connected to a power supply device in the clamping jaw body to get power. Non-preferably, the light emitting electric element 40 may be changed to other electric appliances; the power supply device can also be changed into other electric components, such as a controller, and the conducting wire can transmit current and signals.

Less preferably, the first threading hole 41 is opened at one of the positions from one of the front hinge shafts 60 to the other front hinge shaft 60 (i.e., including the case where the wire passes through one of the front hinge shafts 60).

It should be noted that the axial hole 23 may alternatively not penetrate through the outer short arm 104, that is, the depth of the axial hole 23 is smaller than the thickness of the outer short arm 104, and the wire in the second threading hole 42 passes through the extension line of the first hinge shaft 108 (that is, the wire does not pass through the axial hole 23).

Claims

1. The clamping jaw that drive accuracy is high carries out articulated arm lock including drive arrangement and rear end through the hinge, and drive arrangement drive arm lock winds the hinge rotates its characterized in that: the driving device comprises a feed screw nut mechanism, and a nut or a feed screw in the feed screw nut mechanism moves axially to drive the clamping arm to rotate around the hinge shaft for clamping.

2. A high-drive-accuracy jaw as claimed in claim 1, wherein: the clamping arm comprises a front arm (132), a rear arm (102) and an outer arm which are arranged in parallel, the near ends of the outer arm and the rear arm (102) are respectively provided with the hinge shaft and a third hinge shaft (21), the hinge shaft is marked as a first hinge shaft (108), the far ends of the rear arm (102) and the outer arm are connected to the front arm (132), and the rear arm (102) and the outer arm can respectively rotate; the nut or the screw rod moves axially to drive the outer arm to rotate around the first hinge shaft (108) so as to drive the clamping arm to rotate and clamp.

3. A high-drive-accuracy clamping jaw according to claim 2, characterized in that: the third hinge shaft (21) is provided with a torsion spring (123), and the torsion spring (123) applies force to the rear arm (102) so that the rear arm (102) can rotate.

4. A high-drive-accuracy clamping jaw according to claim 2, characterized in that: the outer arm comprises an outer short arm (104) and an outer long arm (105), the far ends of the outer long arm (105) and the rear arm (102) are hinged to different points of a front arm (132), the far end of the outer short arm (104) is provided with a second hinge shaft (109) and hinged to the near end of the outer long arm (105) through the second hinge shaft (109), the first hinge shaft (108) is located on the outer short arm (104), and the outer short arm (104) is driven by axial movement of a nut or a lead screw to rotate around the first hinge shaft (108) so as to drive the clamping arm to rotate and clamp.

5. A high-drive-accuracy clamping jaw according to claim 4, characterized in that: the feed screw nut mechanism is provided with a pulling arm (51), the near end of the pulling arm (51) is hinged on one of the nut or the feed screw which moves axially, the far end of the pulling arm (51) is provided with a fourth hinge shaft (52) and is hinged on the near end of the outer short arm (104) through the fourth hinge shaft (52).

6. A high-drive-accuracy clamping jaw according to claim 5, characterized in that: the proximal end of the outer short arm (104) extends to a rear extension part (20) in the direction far away from the distal end of the outer short arm (104), and the fourth hinge shaft (52) of the pull arm (51) is hinged on the proximal end of the rear extension part (20).