阅读说明：本技术 一种用于砂型铸造上下箱体快速夹紧的销钉紧固结构 (Pin fastening structure for rapidly clamping upper box body and lower box body in sand casting ) 是由 林宗华 于 2019-12-09 设计创作，主要内容包括：本发明公开了一种用于砂型铸造上下箱体快速夹紧的销钉紧固结构,下箱体箱壁开通L滑槽孔,L滑槽孔底部套接鼓形滑块,鼓形滑块连接螺杆及摇杆,L滑槽孔上部套接滑套筒,滑套筒通过第一弹簧连接圆柱滑块,圆柱滑块设弹簧卡扣；上箱体箱壁设对称的L滑槽孔、鼓形滑块、螺杆、滑套筒及圆柱滑块,销钉母头固接在上箱体圆柱滑块,销钉母头具体是由多个环形分布的抓杆围成的胀紧套结构,销钉母头内通过第二弹簧连接锥形片。本发明利用弹簧弹射原理,实现了上下箱体的快速结合及分离,实现了母头压紧-母头弹射结合-公头母头放松-公头分离状态-母头复位的销钉使用方式,适用于需要砂型铸造时的上下箱体结合过程,彻底摒弃现有靠重压压实的落后方式。(The invention discloses a pin fastening structure for fast clamping an upper box body and a lower box body in sand casting, wherein the box wall of the lower box body is provided with an L-shaped sliding groove hole, the bottom of the L-shaped sliding groove hole is sleeved with a drum-shaped sliding block, the drum-shaped sliding block is connected with a screw rod and a rocker, the upper part of the L-shaped sliding groove hole is sleeved with a sliding sleeve, the sliding sleeve is connected with a cylindrical sliding block through a first spring, and the cylindrical sliding block; the upper box body wall is provided with symmetrical L sliding groove holes, drum-shaped sliding blocks, a screw rod, a sliding sleeve and a cylindrical sliding block, a pin female head is fixedly connected with the cylindrical sliding block of the upper box body, the pin female head is an expansion sleeve structure which is formed by a plurality of annularly distributed grabbing rods in a surrounding mode, and the pin female head is internally connected with a conical sheet through a second spring. The pin using mode of female head pressing, female head ejection combination, male head and female head loosening, male head separation state and female head resetting is realized by utilizing the spring ejection principle, the pin using mode is suitable for the upper and lower box body combining process when sand casting is needed, and the existing lagging mode of pressing by heavy pressure is thoroughly abandoned.)

1. The utility model provides a pin fastening structure that is used for box quick fastening about sand casting, includes that the female head of pin (2) that sets up in last box (1) tank wall and the public head of pin (4) that sets up in box (3) tank wall down, its characterized in that, open at the top of box (3) tank wall down has L slotted hole (5), drum-shaped slider (6) has been cup jointed to the bottom of L slotted hole (5), a terminal surface of drum-shaped slider (6) is connected with screw rod (7), screw rod (7) are for horizontal placement and stretch out down outside box (3) tank wall, the one end rigid coupling that screw rod (7) stretches out down outside box (3) tank wall has rocker (8), the pole wall equidistance of screw rod (7) is equipped with the through-hole, be equipped with fixed block (9) down outside box (3) tank wall, screw rod (7) through-hole links to each other with fixed block (9) through the round pin key of, a sliding sleeve (10) is sleeved on the upper portion of the L-shaped sliding groove hole (5) in a sliding mode, the upper surface of the bottom wall of the sliding sleeve (10) is connected with a cylindrical sliding block (12) through a first spring (11), the cylindrical sliding block (12) is movably sleeved in the sliding sleeve (10), a spring buckle (13) is arranged on the outer wall of the cylindrical sliding block (12), the sliding sleeve (10) is provided with a semicircular groove (14) corresponding to the spring buckle (13), a pin male head (4) is fixedly connected to the top surface of the cylindrical sliding block (12), and the pin male head (4) is a smooth cylinder with the diameter smaller than that of the cylindrical sliding block (12);

the bottom of the box wall of the upper box body (1) is provided with an L-shaped sliding slot hole (5), a drum-shaped sliding block (6), a screw rod (7), a rocker (8), a fixed block (9), a sliding sleeve (10), a first spring (11) and a cylindrical sliding block (12) which are symmetrical with the box wall of the lower box body (3), the pin female head (2) is fixedly connected on the bottom surface of the cylindrical sliding block (12) of the upper box body (1), the pin female head (2) is specifically an expansion sleeve structure formed by a plurality of annularly distributed grabbing rods in a surrounding mode, a conical cylinder cavity structure is arranged inside the pin female head (2), the inner diameter of the upper part of the conical cylinder cavity structure is smaller than the caliber of the lower opening, the initial caliber of the lower opening of the conical cylinder cavity structure is slightly larger than the diameter of the pin male head (4), the top wall of the conical cylinder cavity structure is connected with a conical sheet (16) through a second spring (15);

the caliber of the opening of the L-shaped sliding groove hole (5) is smaller than the outer diameter of the sliding sleeve (10), and the caliber of the opening of the L-shaped sliding groove hole (5) is larger than the outer diameter of the cylindrical sliding block (12).

2. The pin fastening structure for rapidly clamping the upper box body and the lower box body in sand casting according to claim 1, wherein the inside of the cylindrical sliding block (12) is in a cavity structure, the part of the spring buckle (13) extending out of the cylindrical sliding block (12) is in a cylindrical pin shape, and the part of the spring buckle (13) positioned in the cylindrical sliding block (12) is in a V-shaped spring sheet shape.

3. The pin fastening structure for sand casting upper and lower box bodies to rapidly clamp according to claim 1, wherein the outer diameter of the middle part of the drum-shaped sliding block (6) is 5-10 times of the diameter of the screw (7).

4. The pin fastening structure for sand casting upper and lower box bodies to clamp quickly according to claim 1, wherein the contact surfaces of the drum-shaped sliding block (6) and the sliding sleeve (10) are smooth surfaces.

5. The pin fastening structure for sand casting upper and lower box bodies to rapidly clamp according to claim 1, wherein the method for combining and separating the pin female head (2) and the pin male head (4) comprises the following steps:

a. and (3) pressing the female head: firstly, rotating two screw rods (7) to enable two drum-shaped sliding blocks (6) to reach the deepest position, enabling two sliding sleeves (10) to be respectively contacted with the two screw rods (7), then pressing a pin male head (4), enabling a spring buckle (13) of a cylindrical sliding block (12) in a lower box body (3) to be separated from a semicircular groove (14) and to be bounced above the semicircular groove (14), carrying an upper box body (1), enabling the box wall of the upper box body (1) to be lapped on the box wall of the lower box body (3), slowly moving to enable the pin female head (2) to be abutted against the box wall of the lower box body (3), and enabling a first spring (11) in the upper box body (1) to be in an extreme compression state;

b. and (3) carrying out ejection combination on the female head: moving the upper box body (1) to enable the box walls of the upper box body (1) and the lower box body (3) to be completely attached, namely, the upper L sliding groove hole and the lower L sliding groove hole (5) are in butt joint, the pin female head (2) is rapidly ejected into the L sliding groove hole (5) of the lower box body (3) to be in contact socket joint with the pin male head (4), the pin male head (4) tightly stretches the pin female head (2), the outer wall of the pin female head (2) is enabled to be tightly attached to the openings of the two L sliding groove holes (5), and the upper box body (1) and the lower box body (3) are enabled to be tightly combined;

c. loosening the male head and the female head: after casting is finished, firstly, two screw rods (7) are rotated simultaneously, two drum-shaped sliding blocks (6) are respectively contacted with two sliding sleeves (10), the distance between the two sliding sleeves (10) is shortened, two spring buckles (13) are clamped with a semicircular groove (14), two first springs (11) enable the pressing force of a pin female head (2) and a pin male head (4) to be larger, the pin male head (4) continuously extends into the pin female head (2), a second spring (15) is compressed after contacting a conical sheet (16), and the interference clamp of the pin female head (2) is basically fixed at an opening of an L sliding groove hole (5);

d. male separation: rotating a screw rod (7) of the lower box body (3) to enable a sliding sleeve (10) of the lower box body (3) to be in contact with the screw rod (7), under the dual actions of the pulling force of a spring buckle (13) on the sliding sleeve (10) and the ejection of a second spring (15), a pin male head (4) is rapidly separated from a pin female head (2), and the pin female head (2) returns to the original state;

e. resetting the female head: the screw rod (7) of the upper box body (1) is rotated to enable the sliding sleeve (10) of the upper box body (1) to be in contact with the screw rod (7), and under the action of the tensile force of the spring buckle (13) on the sliding sleeve (10), the cylindrical sliding block (12) and the pin female head (2) in the upper box body (1) are enabled to return to the original position, so that the upper box body (1) and the lower box body (3) are separated.

Technical Field

The invention relates to the technical field of sand casting of pig iron castings, in particular to a pin fastening structure for quickly clamping an upper box body and a lower box body in sand casting.

Background

At present, sand casting is still the main forming method of pig iron castings, the sand casting generally adopts two or three boxes to assemble and finally forms the required sand core shape, and after the boxes are assembled, in order to avoid the sand core from being too loose, a heavy piece is generally covered on the top of the upper box, so that the damage of a cavity structure caused by the slippage among the boxes in the casting process is prevented.

With the requirement of the modern science on the precision of the cast iron, the mode of pressing the box by the heavy object is more lagged behind, and the structure of the cavity can be damaged when the box is slightly touched in the actual use process, thereby causing the casting failure.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides the method.

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

a pin fastening structure for fast clamping an upper box body and a lower box body in sand casting comprises a pin female head arranged in the wall of the upper box body and a pin male head arranged in the wall of the lower box body, wherein an L-shaped chute hole is formed in the top of the wall of the lower box body, a drum-shaped sliding block is sleeved at the bottom of the L-shaped chute hole, a screw rod is connected to one end face of the drum-shaped sliding block, the screw rod is horizontally placed and extends out of the wall of the lower box body, a rocker is fixedly connected to one end, extending out of the wall of the lower box body, of the screw rod, through holes are formed in the rod wall of the screw rod at equal intervals, a fixed block is arranged outside the wall of the lower box body, the through hole of the screw rod is connected with the fixed block through a pin key in a penetrating mode, a sliding sleeve is sleeved on the upper portion of the L-shaped chute hole in a sliding mode, a cylindrical sliding, the pin male head is fixedly connected to the top surface of the cylindrical sliding block and is a smooth cylinder with the diameter smaller than that of the cylindrical sliding block;

the bottom of the box wall of the upper box body is provided with an L-shaped sliding slot hole, a drum-shaped sliding block, a screw rod, a rocker, a fixed block, a sliding sleeve, a first spring and a cylindrical sliding block which are symmetrical to the box wall of the lower box body, a pin female head is fixedly connected to the bottom surface of the cylindrical sliding block of the upper box body, the pin female head is specifically an expansion sleeve structure which is surrounded by a plurality of annularly distributed grabbing rods, a conical cylinder cavity structure is arranged inside the pin female head, the inner diameter of the upper part of the conical cylinder cavity structure is smaller than the diameter of an opening at the lower part, the initial diameter of the opening at the lower part of the conical cylinder cavity structure is slightly larger than the diameter of the pin male head, and the top;

the caliber of the opening of the L sliding groove hole is smaller than the outer diameter of the sliding sleeve, and the caliber of the opening of the L sliding groove hole is larger than the outer diameter of the cylindrical sliding block.

Preferably, the inside of the cylindrical sliding block is of a cavity structure, the part of the spring buckle extending out of the cylindrical sliding block is of a cylindrical pin shaft shape, and the part of the spring buckle positioned in the cylindrical sliding block is of a V-shaped spring sheet shape; when the spring buckle is clamped in the semicircular groove, one of the cylindrical sliding block and the sliding sleeve is slightly moved, and the other one is also driven.

Preferably, the outer diameter of the middle part of the drum slider is 5-10 times of the diameter of the screw, so that the drum slider acts as a cam mechanism to eject or retract the sliding sleeve.

Preferably, the contact surfaces of the drum-shaped sliding block and the sliding sleeve are smooth surfaces, so that the drum-shaped sliding block can smoothly contact and eject out of the sliding sleeve.

In order to make the use of the pin fastening structure more clear, the invention also provides a combination and separation method of the pin female head and the pin male head, which comprises the following steps:

a. and (3) pressing the female head: firstly, rotating two screw rods to enable two drum-shaped sliding blocks to reach the deepest positions, enabling two sliding sleeves to be in contact with the two screw rods respectively, then pressing a pin male head, enabling a spring buckle of a cylindrical sliding block in a lower box body to be separated from a semicircular groove and to be bounced above the semicircular groove, carrying an upper box body, enabling the box wall of the upper box body to be lapped on the box wall of the lower box body, slowly moving to enable a pin female head to abut against the box wall of the lower box body, and enabling a first spring in the upper box body to be in an extreme compression state;

b. and (3) carrying out ejection combination on the female head: moving the upper box body to enable the box walls of the upper box body and the lower box body to be completely attached, namely, the upper L sliding groove hole and the lower L sliding groove hole are in butt joint, the pin female head is rapidly ejected into the L sliding groove hole of the lower box body to be in contact with the pin male head for sleeving, and the pin male head tightly presses the pin female head, so that the outer wall of the pin female head is tightly attached to the openings of the two L sliding groove holes, and the upper box body and the lower box body are tightly combined;

c. loosening the male head and the female head: after casting is finished, firstly, two screw rods are rotated simultaneously, two drum-shaped sliding blocks are respectively contacted with two sliding sleeves, the distance between the two sliding sleeves is shortened, two spring buckles are clamped with the semicircular grooves, two first springs enable the pressing force of a pin female head and a pin male head to be larger, the pin male head is enabled to continuously extend into the pin female head, a second spring is enabled to be compressed after the two first springs are contacted with the conical sheet, and the interference clamp of the pin female head at the opening of the L-shaped sliding groove hole is basically fixed;

d. male separation: rotating the screw rod of the lower box body to enable the sliding sleeve of the lower box body to be in contact with the screw rod, and under the dual actions of the pulling force of the spring buckle on the sliding sleeve and the ejection of the second spring, the male pin head is quickly separated from the female pin head, and the female pin head is restored to the original state;

e. resetting the female head: and rotating the screw rod of the upper box body to enable the sliding sleeve of the upper box body to be in contact with the screw rod, and enabling the sliding sleeve, the cylindrical sliding block and the pin female head in the upper box body to return to the original positions under the action of the tensile force of the spring buckle on the sliding sleeve, so that the upper box body and the lower box body are separated.

Compared with the prior art, the invention has the beneficial effects that:

the invention refers to a spring pin structure, the upper box body and the lower box body which are cast by sand mold are respectively provided with a pin male head and a pin female head, the quick combination and separation of the upper box body and the lower box body are realized by utilizing the spring ejection principle, and the use mode of the pin is realized, namely, the use mode of female head pressing-female head ejection combination-male head female head loosening-male head separation state-female head resetting.

Drawings

FIG. 1 is a first structural schematic diagram (female head pressing state) of a pin fastening structure for rapidly clamping upper and lower box bodies in sand casting according to the present invention;

FIG. 2 is a second structural schematic diagram (female ejection combination state) of a pin fastening structure for rapidly clamping upper and lower box bodies in sand casting according to the present invention;

FIG. 3 is a third schematic structural view (male and female loose state) of a pin fastening structure for rapidly clamping upper and lower boxes in sand casting according to the present invention;

FIG. 4 is a fourth schematic structural view (male-head separated state) of a pin fastening structure for rapidly clamping upper and lower boxes in sand casting according to the present invention;

FIG. 5 is a fifth structural schematic view (female reset state) of a pin fastening structure for rapidly clamping upper and lower box bodies in sand casting according to the present invention;

in the figure: the pin box comprises an upper box body 1, a pin female head 2, a lower box body 3, a pin male head 4, an L-shaped sliding groove hole 5, a drum-shaped sliding block 6, a screw 7, a rocker 8, a fixing block 9, a sliding sleeve 10, a first spring 11, a cylindrical sliding block 12, a spring buckle 13, a semicircular groove 14, a second spring 15 and a conical sheet 16.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, a pin fastening structure for sand casting upper and lower box fast clamping comprises a pin female head 2 arranged in the box wall of an upper box 1 and a pin male head 4 arranged in the box wall of a lower box 3, wherein the top of the box wall of the lower box 3 is provided with an L-shaped sliding slot hole 5, the bottom of the L-shaped sliding slot hole 5 is sleeved with a drum-shaped sliding block 6, one end surface of the drum-shaped sliding block 6 is connected with a screw 7, the screw 7 is horizontally arranged and extends out of the box wall of the lower box 3, one end of the screw 7 extending out of the box wall of the lower box 3 is fixedly connected with a rocker 8, the rod wall of the screw 7 is equidistantly provided with through holes, the box wall of the lower box 3 is provided with a fixed block 9, the through hole of the screw 7 is connected with the fixed block 9 through a pin key in a penetrating way, the upper part of the L-shaped sliding slot hole 5 is slidably sleeved with a sliding sleeve 10, a spring buckle 13 is arranged on the outer wall of the cylindrical sliding block 12, a semicircular groove 14 corresponding to the spring buckle 13 is arranged on the sliding sleeve 10, the pin male head 4 is fixedly connected to the top surface of the cylindrical sliding block 12, and the pin male head 4 is a smooth cylinder with the diameter smaller than that of the cylindrical sliding block 12; the bottom of the box wall of the upper box body 1 is provided with an L-shaped sliding slot hole 5, a drum-shaped sliding block 6, a screw rod 7, a rocker 8, a fixed block 9, a sliding sleeve 10, a first spring 11 and a cylindrical sliding block 12 which are symmetrical to the box wall of the lower box body 3, a pin female head 2 is fixedly connected to the bottom surface of the cylindrical sliding block 12 of the upper box body 1, the pin female head 2 is specifically of an expansion sleeve structure surrounded by a plurality of annularly distributed grabbing rods, a conical cylinder cavity structure is arranged inside the pin female head 2, the inner diameter of the upper part of the conical cylinder cavity structure is smaller than the diameter of an opening at the lower part, the initial diameter of the opening at the lower part of the conical cylinder cavity structure is slightly larger than the diameter of a pin male head 4, and the top wall of; the caliber of the opening of the L-shaped sliding groove hole 5 is smaller than the outer diameter of the sliding sleeve 10, and the caliber of the opening of the L-shaped sliding groove hole 5 is larger than the outer diameter of the cylindrical sliding block 12.

Referring to fig. 1-5, the inside of the cylindrical slider 12 is a cavity structure, the part of the spring buckle 13 extending out of the cylindrical slider 12 is in a shape of a cylindrical pin shaft, the part of the spring buckle 13 positioned in the cylindrical slider 12 is in a shape of a V-shaped spring sheet, the spring buckle 13 of the invention adopts a spring buckle structure similar to the existing umbrella handle structure, the spring buckle 13 is used for combining the cylindrical slider 12 and the sliding sleeve 10, and when the spring buckle is pressed strongly, the spring buckle 13 is separated from the semicircular groove 14 by overlarge elastic force, so that most of the cylindrical slider 12 extends out of the sliding sleeve 10; when the spring catch 13 is caught in the semicircular groove 14, one of the cylindrical slider 12 and the sliding sleeve 10 is slightly moved, and the other is also carried.

Referring to fig. 1 to 5, the outer diameter of the middle portion of the drum slider 6 is 5 to 10 times the diameter of the screw 7, so that the drum slider 6 functions as a cam mechanism to eject or retract the slide sleeve 10.

Referring to fig. 1-5, the contact surfaces of the drum slider 6 and the sliding sleeve 10 are smooth surfaces, so that the drum slider 6 can smoothly contact and eject the sliding sleeve 10.

In order to make the use of the pin fastening structure more clear, the invention also provides a method for combining and separating the pin female head 2 and the pin male head 4, which comprises the following steps:

a. and (3) pressing the female head: firstly, rotating two screw rods 7 to enable two drum-shaped sliding blocks 6 to be deepest, enabling two sliding sleeves 10 to be respectively contacted with the two screw rods 7, then pressing a pin male head 4, enabling a spring buckle 13 of a cylindrical sliding block 12 in a lower box body 3 to be separated from a semicircular groove 14 and to be bounced above the semicircular groove 14, carrying an upper box body 1, enabling the box wall of the upper box body 1 to be lapped on the box wall of the lower box body 3, slowly moving to enable a pin female head 2 to be abutted against the box wall of the lower box body 3, and enabling a first spring 11 in the upper box body 1 to be in a high-compression state;

b. and (3) carrying out ejection combination on the female head: moving the upper box body 1 to enable the box walls of the upper box body 1 and the lower box body 3 to be completely attached, namely, the upper L sliding groove hole and the lower L sliding groove hole are in butt joint, the pin female head 2 is rapidly ejected into the L sliding groove hole 5 of the lower box body 3 to be in contact with and sleeved with the pin male head 4, the pin male head 4 tightly presses the pin female head 2, the outer wall of the pin female head 2 is enabled to be tightly attached to the openings of the two L sliding groove holes 5, and the upper box body 1 and the lower box body 3 are enabled to be tightly combined;

c. loosening the male head and the female head: after casting, firstly, simultaneously rotating the two screw rods 7 to enable the two drum-shaped sliding blocks 6 to be respectively contacted with the two sliding sleeves 10, enabling the two sliding sleeves 10 to be close to each other, enabling the two spring buckles 13 to be clamped with the semicircular grooves 14, enabling the pin female head 2 and the pin male head 4 to have larger pressing force through the two first springs 11, enabling the pin male head 4 to continuously extend into the pin female head 2, enabling the second spring 15 to be compressed after contacting with the conical sheet 16, and enabling the pin female head 2 to be in interference fit with the opening of the L-shaped sliding groove hole 5 and basically not to move;

d. male separation: the screw 7 of the lower box body 3 is rotated, so that the sliding sleeve 10 of the lower box body 3 is contacted with the screw 7, the pin male head 4 is rapidly separated from the pin female head 2 under the dual actions of the pulling force of the spring buckle 13 on the sliding sleeve 10 and the ejection of the second spring 15, and the pin female head 2 is restored to the original state;

e. resetting the female head: the screw 7 of the upper box body 1 is rotated to enable the sliding sleeve 10 of the upper box body 1 to be in contact with the screw 7, and the sliding sleeve 10, the cylindrical sliding block 12 and the pin female head 2 in the upper box body 1 are enabled to return to the original positions under the action of the tensile force of the spring buckle 13 on the sliding sleeve 10, so that the upper box body 1 and the lower box body 3 are separated.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.