阅读说明：本技术 砂型夹持机构 (Sand mould fixture ) 是由 李朝东 李佳玫 宋建良 于 2019-11-29 设计创作，主要内容包括：本发明涉及一种砂型夹持机构。所述的砂型夹持机构包括：横梁、转动安装于所述横梁的旋转轴、滑动安装于所述横梁两端的夹持臂以及固定安装于每一所述夹持臂底端的抓手组件；所述抓手组件包括固定座以及相互间隔设置于所述固定座上的若干大抓手与若干小抓手,所述固定座转动安装于对应所述夹持臂的内侧壁上,各所述大抓手用于卡接于大型砂型的吊把上,各所述小抓手用于凸伸于小型砂型的凹型结构内。砂型夹持机构能够适用于不同尺寸大小、重量不同的砂型抓取,能够有效提高生产砂型效率。(The invention relates to a sand mold clamping mechanism. Sand mould fixture include: the clamping device comprises a cross beam, a rotating shaft rotatably mounted on the cross beam, clamping arms slidably mounted at two ends of the cross beam and a gripper assembly fixedly mounted at the bottom end of each clamping arm; the gripping assembly comprises a fixing seat, a plurality of large grippers and a plurality of small grippers, the large grippers and the small grippers are arranged on the fixing seat at intervals, the fixing seat is rotatably installed on the inner side wall corresponding to the clamping arm, each large gripper is used for being clamped on a hanging handle of a large sand mold, and each small gripper is used for protruding into a concave structure of a small sand mold. The sand mold clamping mechanism can be suitable for sand molds with different sizes and weights to grab, and can effectively improve the sand mold production efficiency.)

1. The utility model provides a sand mould fixture which characterized in that, sand mould fixture include: the clamping device comprises a cross beam, a rotating shaft rotatably mounted on the cross beam, clamping arms slidably mounted at two ends of the cross beam and a gripper assembly fixedly mounted at the bottom end of each clamping arm;

the gripping assembly comprises a fixing seat, a plurality of large grippers and a plurality of small grippers, the large grippers and the small grippers are arranged on the fixing seat at intervals, the fixing seat is rotatably installed on the inner side wall corresponding to the clamping arm, each large gripper is used for being clamped on a hanging handle of a large sand mold, and each small gripper is used for protruding into a concave structure of a small sand mold.

2. A sand mould clamping mechanism according to claim 1, wherein each said large finger comprises a polygonal slot structure.

3. A sand mould clamping mechanism according to claim 2, wherein the depth of the polygonal slot body structure is 30mm to 60 mm.

4. A sand mould clamping mechanism according to claim 2, wherein the trough wall thickness of the polygonal trough body structure is 10mm to 24 mm.

5. A sand mould clamping mechanism according to claim 2, wherein the upper edge of the polygonal slot body structure is provided with an inclined angle.

6. A sand mould clamping mechanism according to claim 1, wherein each said mini-gripper comprises a cylindrical configuration.

7. A sand mould clamping mechanism according to claim 6, wherein the upper edge of the cylindrical structure is provided with an inclined angle.

8. A sand mould clamping mechanism according to claim 1, wherein each said large hand grip and each said small hand grip are arranged symmetrically.

9. A sand mould clamping mechanism according to claim 1, wherein the fixed seat and each of the large grippers and each of the small grippers are integrally formed with the fixed seat.

10. A sand mould clamping mechanism according to any one of claims 1 to 9, wherein the number of the large hand grips and the small hand grips is 3 or less.

Technical Field

The invention relates to the field of intelligent equipment manufacturing, in particular to a sand mold clamping mechanism.

Background

Because the 3D printing technology does not need to consider the problems of stripping, material withdrawal and the like in the traditional process, the processes of mould manufacturing, core making, modeling and the like are saved, the sand mould printing and casting of various complex castings can be basically realized, the flexibility of casting process design is greatly improved, the 3D sand mould is gradually accepted by the market based on the huge application advantages, the industrialization is gradually realized, and the 3D sand mould is popularized and applied at a higher development speed. However, the 3D printing sand mold also has the disadvantages that the core bars are not easy to be directly inserted, the core noses are not easy to be hoisted and lifted, and the like, so that a hoisting device or a hanging handle and the like are required to be designed on the sand mold during the design of the sand core for the processes of 3D sand mold discharging, sand cleaning, coating, drying, core assembling and the like. Because 3D prints sand mould structure manufacturability relatively more nimble, consequently differences such as sand mould structure, weight, size are very big, so hardly realize the standardized setting of large-scale and small-size sand mould hanging handle and the automation of robot snatch, overturn and transport etc. the transportation process of most sand moulds still realizes through the mode of manual operation hoist handling sand mould hanging handle at present. In handling, upset and the transportation of whole sand mould, the operation process is complicated and intensity of labour is big, and production efficiency is low, and has your potential safety hazard, can't realize big batch, the high-efficient production of sand mould, more can't form the automation line of sand mould, therefore the sand mould automation of equidimension structure snatchs to become one of the bottleneck that the restriction realizes that sand mould industrialization is used.

Disclosure of Invention

Based on this, it is necessary to be complicated, intensity of labour is big, production efficiency is low, there is the potential safety hazard to the transportation process of sand mould among the prior art, can't realize the big batch of sand mould, high-efficient automated production's problem, provides one kind and can be applicable to not unidimensional size, the sand mould that weight is different and snatch, can effectively improve production sand mould efficiency's sand mould fixture.

The utility model provides a sand mould fixture, sand mould fixture include: the clamping device comprises a cross beam, a rotating shaft rotatably mounted on the cross beam, clamping arms slidably mounted at two ends of the cross beam and a gripper assembly fixedly mounted at the bottom end of each clamping arm; the gripping assembly comprises a fixing seat, a plurality of large grippers and a plurality of small grippers, the large grippers and the small grippers are arranged on the fixing seat at intervals, the fixing seat is rotatably installed on the inner side wall corresponding to the clamping arm, each large gripper is used for being clamped on a hanging handle of a large sand mold, and each small gripper is used for protruding into a concave structure of a small sand mold.

In one embodiment, each of the large fingers includes a polygonal slot structure.

In one embodiment, the depth of the polygonal groove body structure is 30-60 mm.

In one embodiment, the groove wall thickness of the polygonal groove body structure is 10 mm-24 mm.

In one embodiment, the upper edge of the polygonal groove body structure is provided with an inclination angle.

In one embodiment, each of the small fingers includes a cylindrical structure.

In one embodiment, the upper edge of the cylindrical structure is provided with an inclination angle.

In one embodiment, each of the large fingers and each of the small fingers are symmetrically arranged.

In one embodiment, the fixed seat and each of the large hand grips and each of the small hand grips are integrally formed with the fixed seat.

In one embodiment, the number of the large hand grips and the number of the small hand grips are both less than or equal to 3.

Above-mentioned sand mould fixture, through the tongs subassembly that has a plurality of big tongs and little tongs on the centre gripping arm that is used for the centre gripping sand mould, thereby can be convenient for can accomplish centre gripping handling work through one set of sand mould fixture to the sand mould of the little and weight of different specifications, and the rotation axis that rotates the setting on through the crossbeam drives the whole rotation of sand mould, make the sand mould realize the free rotation, thereby effectively improved the sand mould snatch, the upset, the high efficiency operation of processes such as handling and type setting, realize that the sand mould is automatic, intelligent production.

Drawings

Fig. 1 is a schematic perspective view of a sand mold clamping mechanism according to an embodiment.

Fig. 2 is an exploded view of a large gripper and sand mold according to one embodiment.

Fig. 3 is an assembly view of the grapple and sand mold shown in fig. 2.

Fig. 4 is an exploded view of a small gripper and sand mold according to an embodiment.

Fig. 5 is an assembly view of the mini-gripper and sand mold shown in fig. 4.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "disposed on" 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. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for illustrative purposes only and do not represent the only embodiments.

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 herein in the description of the invention 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.

In one embodiment, a sand mold clamping mechanism includes: the clamping device comprises a cross beam, a rotating shaft rotatably mounted on the cross beam, clamping arms slidably mounted at two ends of the cross beam and a gripper assembly fixedly mounted at the bottom end of each clamping arm; the hand grip assembly comprises a fixed seat, and a plurality of large hand grips and a plurality of small hand grips which are arranged on the fixed seat at intervals, wherein each large hand grip is used for being clamped on a hanging handle of a large sand mold, and each small hand grip is used for protruding into a concave structure of a small sand mold.

Above-mentioned sand mould fixture, through the tongs subassembly that has a plurality of big tongs and little tongs on the centre gripping arm that is used for the centre gripping sand mould, thereby can be convenient for can accomplish centre gripping handling work through one set of sand mould fixture to the sand mould of the little and weight of different specifications, and the rotation axis that rotates the setting on through the crossbeam drives the whole rotation of sand mould, make the sand mould realize the free rotation, thereby effectively improved the sand mould snatch, the upset, the high efficiency operation of processes such as handling and type setting, realize that the sand mould is automatic, intelligent production.

The sand mould gripping mechanism is described below with reference to specific embodiments to further understand the inventive concept of the sand mould gripping mechanism. Referring to fig. 1, a sand mold clamping mechanism 10 includes: the device comprises a cross beam 100, a rotating shaft 200 rotatably mounted on the cross beam, clamping arms 300 slidably mounted at two ends of the cross beam, and a gripper assembly 400 fixedly mounted at the bottom end of each clamping arm; the gripper assembly 400 comprises a fixed seat 410, and a plurality of large grippers 420 and a plurality of small grippers 430 which are arranged on the fixed seat at intervals, wherein each large gripper 420 is used for being clamped on a hanging handle of a large sand mold, and each small gripper 430 is used for protruding into a concave structure of a small sand mold.

Specifically, the rotating shaft 200 is installed in the middle of the beam 100, the lifting driving truss is connected with the rotating shaft 200, and the lifting truss can be conveniently controlled to rotate the beam 100 through the rotating shaft 200, so that the sand mold grabbing and lifting angle can be adjusted conveniently. And it is advantageous to ensure the balanced support of the cross member 100 by installing the rotation shaft 200 at the middle position of the cross member 100. Further, the two ends of the beam 100 are slidably provided with the clamping arms 300, that is, two clamping arms 300 are oppositely arranged at intervals, so as to form a gripper structure for gripping the sand mold. For example, clamp arm 300 is mounted on a slide rail on beam 100. Can be convenient for like this at any time through the stroke distance of adjusting two centre gripping arms to the adjustment snatchs the sand mould of different size and dimension. Furthermore, the gripper assemblies 400 are arranged on the opposite side surfaces of the two clamping arms 300, the sand mold is stably gripped by the gripper assemblies 400, then the sand mold is tightened by adjusting the clamping arms 300, and the sand mold is adjusted and moved in a space position by the lifting driving truss connected with the rotating shaft. That is, the gripping arm 300 and the gripper assembly 400 are structures for stably gripping the sand mold, and further space operation of the sand mold is realized by the cross beam and the rotating shaft in cooperation with the lifting driving truss.

Referring to fig. 2 to 5, specifically, the fixing base 410 is rotatably installed at the bottom end of the inner side wall of each of the clamping arms 300, and the fixing base 410 is used for stably installing a plurality of large grippers 420 and a plurality of small grippers 430 on the fixing base 410. In one embodiment, the fixing base 410 is rotatably disposed on the holding arm 300 by a transmission mechanism of the sand mold holding mechanism. That is, the transmission mechanism drives the fixing base 410 to rotate, so as to drive the large gripper 420 and the small gripper 430 on the fixing base to rotate and turn over the sand mold. In one embodiment, the large grip 420 and the small grip 430 are made of high alloy steel. This ensures the strength of the grip structure. In one embodiment, each of the large fingers 420 and each of the small fingers 430 are symmetrically arranged. For example, a plurality of large grippers are arranged at equal intervals on one side of the surface of the fixing base, and a plurality of small grippers are arranged at equal intervals on the other side of the surface of the fixing base, which is symmetrical to the large grippers. In order to ensure the grip mounting stability, in one embodiment, the fixing base 410 and each of the large grips 420 and the small grips 430 are integrally formed with the fixing base 410. Like this, thereby because the integral type setting can be convenient for tongs structural stability to avoid the stable of influence to the sand mould to snatch.

It should be noted that, because the heavy sand mold with the large-size structure is conveniently provided with the hanging handle structure during design so as to be beneficial to hoisting the sand mold, the large gripper 420 matched with the protruding hanging handle structure is arranged, so that the large gripper 420 is clamped on the hanging handle 510 of the heavy sand mold 500 with the large-size structure, and the sand mold is stably gripped. Similarly, for the sand mold with a small-sized structure, since it is inconvenient to design the protruding type hanging handle, the small-sized sand mold 430 matched with the protruding type is generally realized by arranging the concave structure 610 on the small-sized sand mold 600 in the industry, so that the small-sized sand mold can be stably gripped by the small-sized sand mold 430. Furthermore, the small gripper structure mainly realizes that the size and the shape of the sand mould are small, the sand mould of the sand mould lifting handle cannot be placed, and the gripping design mainly aims at the sand mould with small size and weight. The small-size handle that hangs is the spill structure of design unanimous with small-size tongs structure on the sand mould, during the use the bellied column structure embedding of small-size tongs during the spill structure of psammitolite, this kind of design had both solved because the too little problem that can't place bellied sand mould handle that hangs of psammitolite, the holistic overall dimension of sand mould has also been reduced simultaneously, the layout rate of printer work box has been improved, also utilized the thickness and the intensity of sand mould mechanism itself simultaneously, make the hoisting structure of sand mould can satisfy the required intensity of handling process, realize snatching the handling of sand mould. Moreover, it should be understood that the plurality of large grippers 420 and the plurality of small grippers 430 are arranged on the fixing base 410, so that the large sand mold and the small sand mold can be gripped simultaneously or respectively by using one set of sand mold clamping mechanism, which is beneficial to improving the high efficiency operation of the processes of gripping, overturning, hoisting, assembling and the like of the sand mold, and realizing the automatic and intelligent production of the sand mold.

Above-mentioned sand mould fixture, through the tongs subassembly that has a plurality of big tongs and little tongs on the centre gripping arm that is used for the centre gripping sand mould, thereby can be convenient for can accomplish centre gripping handling work through one set of sand mould fixture to the sand mould of the little and weight of different specifications, and the rotation axis that rotates the setting on through the crossbeam drives the whole rotation of sand mould, make the sand mould realize the free rotation, thereby effectively improved the sand mould snatch, the upset, the high efficiency operation of processes such as handling and type setting, realize that the sand mould is automatic, intelligent production.

To facilitate matching the shape and configuration of different sand mold handles, in one embodiment, each large hand grip 420 includes a polygonal slot structure. For example, the large hand grip has a polygonal groove structure such as a rectangle or a hexagon. Namely, the large gripper is a groove-shaped structure body with an opening, and a hanging handle of the sand mold is clamped in the groove-shaped structure body through the opening of the large gripper so as to realize reliable gripping of the sand mold. Preferably, the big handle is of a rectangular polygonal groove structure. It should be noted that, in the case of the same maximum contour dimension, the area of the rectangle is the largest, so the contact area between the sand mold lifting handle and the sand mold is also the largest, that is, the force that the sand mold lifting handle can bear is also the largest, and the weight of the lifted sand mold is also the largest. In one embodiment, each of the small fingers 430 includes a cylindrical structure. For example, the small hand grip is a columnar structure in various forms such as a rectangular cylinder, a polygonal cylinder or a cylinder. Preferably, each of the small fingers 430 is a cylinder.

In order to ensure that the sand mold can be firmly and reliably grabbed and the outline size of the sand mold is not increased as much as possible, in one embodiment, the depth of the polygonal groove body structure is 30-60 mm. Preferably, the depth of the polygonal groove body structure is 45 mm. In order to ensure the lifting strength, in one embodiment, the groove wall thickness of the polygonal groove body structure is 10 mm-24 mm. Preferably, the depth of the polygonal groove structure is 15 mm.

In order to ensure effective matching and smooth gripping of the gripping structure and the lifting handle, in one embodiment, the upper edge of the polygonal groove body structure is provided with an inclined angle. That is, the edge of the big gripper far away from the fixed seat is provided with a chamfer or is arranged into an inclination edge, so that the big gripper plays a guiding role in the gripping process, and preferably, the inclination ranges from 2 degrees to 5 degrees. The gripper and the hanging handle are matched with each other, and a gap of 1 mm-3 mm is formed along the circumference, so that automatic gripping can be smoothly realized. In an embodiment, the upper edge of the cylindrical structure is provided with an inclination angle. Like this, through the little tongs of the cylindricality body that sets up the angle of inclination make the bottom sectional area of the cylindricality body be greater than the upper portion sectional area, so just can play the guide effect, be convenient for cooperation and the snatching between sand mould and the tongs.

In order to facilitate the realization of efficient and automatic grabbing of sand molds with different structure types, in one embodiment, the number of the large grippers and the number of the small grippers are less than or equal to 3. Preferably, the number of the large hand grips and the small hand grips is 2. Namely, one gripper assembly mounted on each gripping arm comprises two large grippers and two small grippers. Specifically, when the gripper structures are designed, the number of the gripper structures can be freely combined according to the weight of the sand mold and the maximum weight that the gripper structures can bear, the number can be 2 or more, the combination mode can be alignment arrangement combination or irregular arrangement, and generally 2 regularly arranged structures are preferred.

Above-mentioned sand mould fixture integrates and uses through the tongs with equidimension not and isostructure, reduces or has saved the change of tongs or change frequency and number of times, synthesizes the layout through the sand mould that multiple size is inequality simultaneously, has improved the space utilization of 3D printer work box, very big improvement the work efficiency of 3D printer. Therefore, through the design of the structure of the hand grips and the sand mold lifting handles, the hand grips are matched with the clamping mechanisms to achieve free lifting of sand molds with different sizes and specifications, the rotation of the hand grips drives the whole sand molds to rotate, the sand molds can also achieve free rotation, the high-efficiency operation of the processes of grabbing, overturning, lifting, forming and the like of the sand molds is improved, and automatic and intelligent production is achieved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.