Adjustable bar gripper

Abstract

The utility model provides an adjustable bar gripper which comprises a bearing table and clamping jaws symmetrically installed on the bearing table in a sliding mode, the top of the bearing table is connected with an external driving device through a floating connector, a driving mechanism is arranged in the bearing table, and the driving mechanism is connected with the clamping jaws and can drive the clamping jaws on the two sides to be opened or closed synchronously. Clamping grooves are formed in the bottoms of the clamping jaws, turnover mechanisms and clamping blocks are arranged at the positions, located in the clamping grooves, of the clamping jaws, and the turnover mechanisms can drive the clamping blocks to turn over and stretch out of the clamping jaws. According to the adjustable bar gripper, the driving mechanism can drive the clamping jaw to contract and clamp along the bearing table and is used for clamping bars with small pipe diameters, the clamping block is movably installed at the bottom of the clamping jaw through the turnover mechanism, and after the turnover mechanism drives the clamping block to be turned over outwards and opened, bars with large pipe diameters can be clamped through the clamping block. And adaptation of various bars is achieved, and the safety of equipment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bar tongs technical field, in particular to adjustable bar tongs. BACKGROUND

[0002] Bar tongs are used for automatically clamping bars, and the patent with the application number 201720412332.X discloses a bar feeding robot tong, which comprises a base, a sliding block assembly, a first tong finger, a first connecting rod, a second tong finger and a second connecting rod, the sliding block assembly is slidably arranged on the base, the front part of the first tong finger is a first gripping part, the middle part of the first tong finger is hingedly connected to the base, one end of the first connecting rod is hingedly connected to the sliding block assembly, the other end of the first connecting rod is hingedly connected to the rear part of the first tong finger, the front part of the second tong finger is a second gripping part, the middle part of the second tong finger is hingedly connected to the base, one end of the second connecting rod is hingedly connected to the sliding block assembly, and the other end of the second connecting rod is hingedly connected to the rear part of the second tong finger. The bar tong of the structure has the problem of fixed structure at the tong, which causes it to be able to only clamp a certain size and quality of bar body, and when a larger pipe diameter or a heavier bar body is encountered, it is easy to fall off, so there is a safety hazard. SUMMARY

[0003] (I) Technical problem to be solved

[0004] The problem to be solved by the utility model is to provide adjustable bar tongs to overcome the defects in the prior art that the bar tongs can only clamp bar materials within a certain range of diameters, are easy to fall off and have safety hazards.

[0005] (II) Technical scheme

[0006] To solve the technical problem, the utility model provides adjustable bar tongs, which comprise a bearing table and clamping jaws symmetrically and slidably installed on the bearing table, the top of the bearing table is connected with an external driving device through a floating connector, a driving mechanism is arranged in the bearing table, the driving mechanism is connected with the clamping jaws, and the clamping jaws on both sides can be driven to open or close synchronously, the bottom of each clamping jaw is provided with a clamping groove, a turnover mechanism and a clamping block are arranged in the inside of the clamping groove of the clamping jaw, the turnover mechanism can drive the clamping block to turn over and extend out of the clamping jaw, the clamping groove is used for directly clamping a pipe with a pipe diameter of 150mm-300mm, the clamping block is used for clamping a pipe with a pipe diameter of 300mm-500mm, and the pipe abuts against the upper end face of the clamping block when clamped.

[0007] In some embodiments, a set of turnover mechanisms and clamping blocks are symmetrically arranged in the clamping jaw, the turnover mechanism comprises a horizontally arranged air cylinder, a rack connected to the outside of the air cylinder and a gear engaged with the rack and coaxially arranged with the clamping block, the air cylinder drives the rack to move to drive the gear and the clamping block to rotate.

[0008] In some embodiments, the clamping block is in the shape of a long strip, one end of the clamping block is connected to the gear through a connecting shaft, the upper end face of the other end is provided with an inclined supporting surface, the driving mechanism comprises a driving motor, a screw rod and a screw rod seat, the bottom of the driving motor is provided with a right-angle transmission box, both ends of the right-angle transmission box are symmetrically connected with the screw rod, the screw rod is movably arranged with the screw rod seat, and the clamping jaw is fixed to the bottom of the screw rod seat; the right-angle transmission box, the screw rod and the screw rod seat are horizontally arranged, and the driving motor is vertically arranged.

[0009] In some embodiments, the floating connector comprises a plurality of universal mechanisms and connecting plates, the connecting plates are symmetrically arranged at the upper and lower ends of the universal mechanisms and are connected with the bearing table and the external driving device respectively; two sets of the universal mechanisms are arranged between the connecting plates, the universal mechanisms are arranged at the four corners of the connecting plates respectively, the universal mechanism comprises a first movable piece, a second movable piece and a connecting piece, the connecting piece is a cross-shaped pipe, the front and rear ends of the connecting piece are hinged to the first movable piece, and the left and right ends of the connecting piece are hinged to the second movable piece.

[0010] In some embodiments, the first movable piece and the second movable piece are the same in structure and are in the shape of U, the first movable piece and the second movable piece are inverted, the end portions of the first movable piece and the second movable piece are provided with connecting surfaces, and the bottom of the clamping jaw is provided with a sensor.

[0011] (Three) beneficial effects

[0012] The adjustable bar material gripper provided by the utility model can drive the clamping jaw to contract and clamp along the bearing table, is used for clamping a bar material with a small pipe diameter, the clamping block is movably arranged on the bottom of the clamping jaw through the turnover mechanism, the clamping block can be further opened outward by the turnover mechanism, and the bar material with a large pipe diameter can be clamped through the clamping block after the clamping block is opened outward, so that various bar materials can be matched, and the safety of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 Figure 1 is a perspective view of the adjustable bar material gripper according to the present application;

[0015] Figure 2 Figure 2 is a sectional view of the adjustable bar material gripper according to the present application;

[0016] Figure 3 Figure 3 is a perspective view of the internal structure of the bearing table of the adjustable bar material gripper according to the present application;

[0017] Figure 4 Figure 4 is a perspective view of the clamping jaw of the adjustable bar material gripper according to the present application;

[0018] Figure 5 Figure 5 is a perspective view of the turnover mechanism of the adjustable bar material gripper according to the present application;

[0019] Figure 6 Figure 6 is a perspective view of the floating connector of the adjustable bar material gripper according to the present application;

[0020] Figure 7 Figure 7 is a perspective view of the universal mechanism of the adjustable bar material gripper according to the present application.

[0021] Corresponding component names of various reference numerals in the drawings are as follows: 1, bearing table; 2, clamping jaw; 3, clamping groove; 4, clamping block; 5, air cylinder; 6, gear; 7, rack; 8, support surface; 9, driving motor; 10, screw rod; 11, screw rod seat; 12, right-angle transmission box; 13, connecting plate; 14, first movable piece; 15, second movable piece; 16, connecting piece; 17, connecting surface; 18, sensor. DETAILED DESCRIPTION

[0022] The embodiments of the present application will be described in detail below with reference to the drawings.

[0023] The embodiments of the present application will be described in detail below with reference to the drawings.

[0024] It is to be understood that the embodiments described herein are illustrative only and the scope of the application should not be deemed limited thereto by the description of the embodiments in the summary or the detailed description. Various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be implemented in a wide variety of forms and that any particular structure and / or function described herein is merely illustrative. An aspect described herein can be implemented alone or in combination with any other aspect or aspects. Further, any aspect described herein can be implemented with respect to any other structure instead of the structure described. For example, a device can be implemented to practice a method or realize any number and combination of the aspects set forth herein. Additionally, the device can be implemented to practice the method and / or realize the aspects using other structure and / or functionality in addition to or other than that set forth herein.

[0025] It is also to be understood that the drawings provided herein are merely schematic and that the actual implementation of the application can differ from the schematic illustrations as described herein.

[0026] In addition, in the following description, numerous specific details are set forth in order to provide a thorough understanding of the examples. However, it will be apparent to one skilled in the art that the examples can be practiced without these specific details.

[0027] Referring to Figures 1-7 The utility model provides a kind of adjustable bar gripper, including bearing table 1 and the gripper jaw 2 of symmetrical sliding installation on bearing table 1, the top of bearing table 1 is connected external driving device by floating connector, floating connector makes bearing table 1 can swing along certain angle, it is convenient to clamp curved bar, bearing table 1 is equipped with driving mechanism, driving mechanism connects gripper jaw 2, can drive the gripper jaw 2 of two sides synchronous opening or closing, the bottom of gripper jaw 2 is equipped with clamping groove 3, gripper jaw 2 is located in the inside of clamping groove 3 is equipped with turnover mechanism and clamping block 4, turnover mechanism can drive clamping block 4 overturn and extend gripper jaw 2;Wherein turnover mechanism can drive clamping block 4 overturn and extend gripper jaw 2, clamping groove 3 is used for directly clamping the pipe of 150mm-300mm, clamping block 4 is used for clamping the pipe of 300mm-500mm, and pipe is abutted on the upper end surface of clamping block 4 when clamping, to improve stability, avoid bar drop.

[0028] In some embodiments, as Figure 4 and Figure 5As shown, a set of turnover mechanisms and clamping blocks 4 are symmetrically arranged in the clamping jaw 2, the turnover mechanisms include horizontally arranged air cylinders 5, racks 6 and gears 7, the racks 6 are connected to the outer sides of the air cylinders 5, the gears 7 are coaxially arranged with the clamping blocks 4 and are engaged with the racks 6, the air cylinders 5 drive the racks 6 to move to rotate the gears 7, and the rotating shafts in the gears 7 drive the clamping blocks 4 to rotate; specifically, the clamping blocks 4 are long strips, one end of the clamping block 4 is connected to the gear 7 through a connecting shaft, and an inclined support surface 8 is arranged on the upper end face of the other end of the clamping block 4, so that the support surface 8 is exposed from the clamping jaw 2 after the clamping block 4 rotates, for positioning and clamping the bar material, and sensors 18 are arranged on the bottom of the clamping jaw 2, for detecting whether the bar material is clamped.

[0029] In some embodiments, as shown in Figure 2 and Figure 3 The driving mechanism includes a driving motor 9, a lead screw 10 and a lead screw seat 11, the bottom of the driving motor 9 is provided with a right-angle transmission box 12, the two ends of the right-angle transmission box 12 are symmetrically connected with the lead screw 10, the lead screw 10 is movably arranged with the lead screw seat 11, and the clamping jaw 2 is fixed to the bottom of the lead screw seat 11, wherein the right-angle transmission box 12, the lead screw 10 and the lead screw seat 11 are horizontally arranged, the driving motor 9 is vertically arranged, the right-angle transmission box 12 changes the vertical driving force of the driving motor 9 into the axial driving force of the lead screw 10, and the lead screw 10 drives the lead screw seats 11 at both ends to synchronously merge and then expand, so as to drive the clamping jaw 2 to move.

[0030] In some embodiments, as shown in Figure 6 and Figure 7 The floating connector includes a plurality of universal mechanisms and a connecting plate 13, the connecting plate 13 is symmetrically arranged at the upper and lower ends of the universal mechanisms and is connected with the bearing table 1 and the external driving device respectively, two groups of universal mechanisms are arranged between the connecting plates 13, and the universal mechanisms are arranged at the four corners of the connecting plate 13; specifically, the universal mechanism includes a first movable piece 14, a second movable piece 15 and a connecting piece 16, the connecting piece 16 is a cross-shaped pipe, the front and rear ends of the connecting piece 16 are hinged to the first movable piece 14, and the left and right ends are hinged to the second movable piece 15, the first movable piece 14 and the second movable piece 15 are the same in structure and are both U-shaped, the first movable piece 14 is inverted with the second movable piece 15, the connecting piece 16 enables the first movable piece 14 and the second movable piece 15 to be flipped in the front-rear and left-right directions respectively, and the end portions of the first movable piece 14 and the second movable piece 15 are provided with connecting surfaces 17, so that the connecting surfaces 17 can be universally moved to facilitate clamping of the inclined bar material.

[0031] The utility model provides a kind of adjustable bar material gripper, driving mechanism can drive clamping jaw to contract along bearing platform and clamps, for clamping smaller pipe diameter bar material, clamping jaw bottom is movably installed with clamping block by turnover mechanism, after clamping block is driven by turnover mechanism and is turned outwards and is opened, still can be clamped larger pipe diameter bar material by clamping block, multiple bar material adaptation is realized, and the safety of equipment is improved.

[0032] The above description is only preferred embodiments of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the technical principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the utility model.

Claims

1. An adjustable bar gripper comprising a bearing table (1) and a clamping jaw (2) symmetrically slidingly mounted on the bearing table (1), characterized in that: The top of the bearing table (1) is connected with external driving device through floating connector, the bearing table (1) is internally provided with driving mechanism, the driving mechanism is connected with the clamping jaw (2), can drive the clamping jaw (2) on both sides to open or close synchronously, the bottom of the clamping jaw (2) is provided with clamping groove (3), the inside of the clamping jaw (2) in the clamping groove (3) is provided with turnover mechanism and clamping block (4), the turnover mechanism can drive the clamping block (4) to overturn and extend out of the clamping jaw (2).

2. The adjustable bar stock gripper of claim 1, wherein: A group of turnover mechanisms and clamping blocks (4) are symmetrically arranged in the clamping jaw (2), the turnover mechanism comprises a horizontally arranged air cylinder (5), a rack (6) and a gear (7), the rack (6) is connected to the outer side of the air cylinder (5), the gear (7) is engaged with the rack (6) and coaxially assembled with the clamping block (4), the air cylinder (5) drives the rack (6) to move to drive the gear (7) and the clamping block (4) to rotate.

3. The adjustable bar stock gripper of claim 2, wherein: The clamping block (4) is in the shape of a long strip, one end of the clamping block (4) is connected with the gear (7) through a connecting shaft, and the upper end face of the other end is provided with an inclined supporting surface (8).

4. The adjustable bar stock gripper of claim 1, wherein: The driving mechanism comprises a driving motor (9), a lead screw (10) and a lead screw seat (11), the bottom of the driving motor (9) is provided with a right-angle transmission box (12), both ends of the right-angle transmission box (12) are symmetrically connected with the lead screw (10), the lead screw (10) is movably assembled with the lead screw seat (11), and the clamping jaw (2) is fixed to the bottom of the lead screw seat (11).

5. The adjustable bar stock gripper of claim 4, wherein: The right-angle transmission box (12), the lead screw (10) and the lead screw seat (11) are all horizontally arranged, and the driving motor (9) is vertically arranged.

6. The adjustable bar stock gripper of claim 1, wherein: The floating connector comprises a plurality of universal mechanisms and connecting plates (13), the connecting plates (13) are symmetrically arranged at the upper and lower ends of the universal mechanisms and are respectively connected with the bearing table (1) and the external driving device.

7. The adjustable bar stock gripper of claim 6, wherein: Two groups of universal mechanisms are arranged between the connecting plates (13), and the universal mechanisms are arranged at the four corners of the connecting plates (13).

8. The adjustable bar stock gripper of claim 6, wherein: The universal mechanism comprises a first movable part (14), a second movable part (15) and a connecting part (16), the connecting part (16) is a cross-shaped pipe, the front and rear ends of the connecting part (16) are hinged to the first movable part (14), and the left and right ends are hinged to the second movable part (15).

9. The adjustable bar stock gripper of claim 8, wherein: The first movable part (14) and the second movable part (15) are the same in structure and are both in the shape of U, the first movable part (14) is inverted with the second movable part (15), and the end portions of the first movable part (14) and the second movable part (15) are provided with connecting surfaces (17).

10. The adjustable bar stock gripper of claim 1, wherein: The bottom of the clamping jaw (2) is provided with a sensor (18).

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