Sand box device

Abstract

The utility model discloses a sand box device, include: the bottom connection of elevating platform has crossbeam, and crossbeam has first end portion, the inside box is covered in the outside of elevating platform, and inside box has first box wall, and first box wall is equipped with the avoidance slot, drive assembly is used for driving crossbeam to go up and down, and drive assembly includes driver and the transmission mechanism that is connected between first end portion and driver, sealing mechanism includes swing rod and the packer tape, and one end of swing rod is hinged in crossbeam, and the other end of swing rod is equipped with the pressure roller, and swing rod is connected with the elastic member between crossbeam, and the lower side of pressure roller is equipped with the guide pulley, and the packer tape cover is equipped in the avoidance slot, and the packer tape is from top to bottom in proper order through between elevating platform and first box wall, between pressure roller and first box wall, the one side of guide pulley deviating first box wall. Through setting pressure roller, swing rod and elastic member, whether elevating platform rises or falls, pressure roller always will packer tape press in first box wall, avoid the problem that packer tape and elevating platform's edge abut, alleviate the wear and tear of packer tape.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a sand box device. Background Technology

[0002] The sand chamber of a sand mold 3D printer provides a robust boundary for the sand throughout the printing process, and also serves as a lifting platform. There are several ways to drive the lifting platform within the sand chamber. One method involves placing the actuator outside the printing area and installing a transverse beam running through the side wall of the sand chamber. The actuator drives the beam to drive the lifting platform. This necessitates vertical clearance slots in the side wall of the sand chamber for the beam to pass through, with a sealing strip covering the clearance slots between the lifting platform and the side wall of the sand chamber. However, this sand chamber design has some shortcomings; for example, the sealing strip is prone to wear and requires frequent replacement. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a sand box device.

[0004] The sand box device according to an embodiment of the present invention includes:

[0005] A lifting platform with a crossbeam connected to its bottom, the crossbeam having a first end protruding from the edge of the lifting platform;

[0006] The inner box is fitted around the outside of the lifting platform. The inner box has a first box wall, and the first box wall is provided with a clearance groove that is adapted to the first end.

[0007] A drive assembly for driving the crossbeam to rise and fall, the drive assembly including a driver and a transmission mechanism connected between the first end and the driver, the transmission mechanism being located outside the inner box;

[0008] The sealing mechanism includes a swing arm and a sealing strip. One end of the swing arm is hinged to the crossbeam, and the other end of the swing arm is provided with a pressure roller. An elastic element is connected between the swing arm and the crossbeam. A guide roller is provided below the pressure roller. The sealing strip covers the clearance groove. The sealing strip passes from top to bottom between the lifting platform and the first box wall, between the pressure roller and the first box wall, and on the side of the guide roller away from the first box wall. Both ends of the sealing strip are connected to the inner box.

[0009] The sand box device according to the embodiment of this utility model has at least the following technical effects: by setting up a pressure roller, a swing rod and an elastic element, the pressure roller always presses the sealing strip against the first box wall, regardless of whether the lifting platform is rising or falling, avoiding the problem of the sealing strip abutting against the edge of the lifting platform and reducing the wear of the sealing strip; moreover, the pressure roller is floatingly connected to the crossbeam through the swing rod, so the pressure roller will not hinder the lifting of the lifting platform, making the lifting of the lifting platform smooth.

[0010] According to some embodiments of the present invention, the guide wheel is located below the side of the pressure wheel away from the first box wall.

[0011] According to some embodiments of this utility model, with the first box wall relative to the lifting platform as the left side, the swing arm is inclined downward from left to right.

[0012] According to some embodiments of this utility model, the elastic element is a vertically arranged tension spring, and the top and bottom ends of the elastic element are respectively connected to the swing rod and the crossbeam.

[0013] According to some embodiments of the present invention, the first end, the clearance groove, the transmission mechanism and the sealing mechanism are collectively referred to as the end assembly, and the end assembly is provided at both ends of the crossbeam.

[0014] According to some embodiments of this utility model, there are two crossbeams, and the two crossbeams are arranged in parallel.

[0015] According to some embodiments of the present invention, the drive assembly further includes a linkage mechanism, which has an input end and four output ends. The input end is connected to the driver, and the four output ends are connected one-to-one to the four transmission mechanisms.

[0016] According to some embodiments of this utility model, the linkage mechanism is located at the bottom of the inner box.

[0017] According to some embodiments of the present invention, the transmission mechanism includes a first gearbox and a vertically arranged lead screw, wherein the lead screw and the first gearbox are sequentially connected between the first end and the output end.

[0018] According to some embodiments of the present invention, the linkage mechanism includes a primary gearbox and two secondary gearboxes. The input shaft of the primary gearbox is the input end, the input shafts of the two secondary gearboxes are respectively connected to the two output shafts of the primary gearbox, and the output shaft of the secondary gearbox is the output end.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the sand box device according to an embodiment of the present invention;

[0022] Figure 2 This is a partial sectional view of the front view of the sand box device according to an embodiment of the present invention;

[0023] Figure 3 yes Figure 1 An enlarged view of region A in the diagram;

[0024] Figure 4 This is a top sectional view of the sand box device according to an embodiment of the present invention;

[0025] In the attached image:

[0026] 100-Inner box; 110-First box wall; 111-Allowing groove; 200-Lifting platform; 210-Crossbeam; 211-First end; 212-Passage channel; 220-Guide wheel; 230-Tension spring; 240-Swing rod; 250-Pressure wheel; 300-Outer protective shell; 310-Lead screw; 320-First gearbox; 330-Second gearbox; 340-Motor; 350-First gearbox; 400-Sealing strip. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, while "above," "below," "within," etc., are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] The following is for reference. Figures 1 to 4 This invention describes a sand box device according to an embodiment of the present invention.

[0031] The sand box device of this utility model embodiment refers to... Figure 1 It includes a lifting platform 200, an inner box 100, a drive assembly, and a sealing mechanism.

[0032] The bottom of the lifting platform 200 is connected to a crossbeam 210. The lifting platform 200 is rectangular, and the crossbeam 210 extends to the left and right. The crossbeam 210 has a first end 211 that protrudes from the edge of the lifting platform 200. The first end 211 is located at the left end of the crossbeam 210. The front-to-back dimension of the first end 211 is smaller than the front-to-back dimension of the main body of the crossbeam 210. The crossbeam 210 is provided with a passage 212. The passage 212 is located below the edge of the lifting platform 200 and passes through the crossbeam 210 vertically.

[0033] The inner box 100 is fitted onto the outside of the lifting platform 200. The inner box 100 is a rectangular box with an open top. The inner box 100 has a first box wall 110 located on the left side of the inner box 100. The first box wall 110 is provided with a relief groove 111 that is adapted to the first end 211. The relief groove 111 is a vertically extending strip-shaped groove. The first end 211 passes through the relief groove 111 from the inside to the outside and extends to the outside of the inner box 100. The front-to-back dimension of the passage 212 is larger than the front-to-back dimension of the relief groove 111.

[0034] The drive assembly is used to drive the crossbeam 210 to rise and fall. The drive assembly includes a driver and a transmission mechanism connected between the first end 211 and the driver. The transmission mechanism is located outside the inner box 100. By setting the transmission mechanism outside the inner box 100, the transmission mechanism does not occupy the space inside the inner box 100 located below the lifting platform 200, so that the lifting platform 200 can be lowered to a lower height, which is beneficial to increasing the maximum height dimension of the sand mold that the sand mold 3D printer can print.

[0035] The sealing mechanism includes a rocker arm 240 and a sealing strip 400, the sealing strip 400 being a flexible component, as shown in the reference. Figure 3 One end of the swing arm 240 is hinged to the crossbeam 210, and the hinge shaft at the hinge point extends forward and backward. The other end of the swing arm 240 is provided with a pressure roller 250, which is rotatably mounted on the swing arm 240 via a rotating shaft that extends forward and backward. Below the pressure roller 250 is a guide roller 220, which is rotatably mounted on the swing arm 240 via a rotating shaft that extends forward and backward.

[0036] The barrier 400 is installed on the clearance groove 111. The front-to-back dimensions of the barrier 400 are larger than the front-to-back dimensions of the clearance groove 111, and the front-to-back dimensions of the barrier 400 are smaller than the front-to-back dimensions of the passage 212. The barrier 400 crosses the edge of the lifting platform 200 from top to bottom and then passes through the passage 212.

[0037] The guide roller 220 can be set inside the passageway 212, the pressure roller 250 is set above the passageway 212, the pressure roller 250 is set below the lifting platform 200, the sealing strip 400 passes from top to bottom between the lifting platform 200 and the first box wall 110, between the pressure roller 250 and the first box wall 110, and on the side of the guide roller 220 away from the first box wall 110. Both ends of the sealing strip 400 are connected to the inner box 100. An elastic element is connected between the swing rod 240 and the crossbeam 210, so that the swing rod 240 has a tendency to swing towards the first box wall 110, thereby causing the pressure roller 250 to press the sealing strip 400 against the first box wall 110.

[0038] It should be noted that in the relevant technology, after the sealing strip 400 crosses the edge of the lifting platform 200 from top to bottom, it folds and extends obliquely to the side away from the first box wall 110, and is not pressed against the first box wall 110 by the pressure roller 250. This causes the bottom edge of the lifting platform 200 to move downward when it comes into contact with the sealing strip 400, resulting in rapid wear of the sealing strip 400.

[0039] This invention, by setting up a pressure roller 250, a swing rod 240, and an elastic element, ensures that regardless of whether the lifting platform 200 rises or falls, the pressure roller 250 always presses the sealing strip 400 against the first box wall 110, avoiding the problem of the sealing strip 400 abutting against the edge of the lifting platform 200, reducing the wear of the sealing strip 400, eliminating the need for frequent replacement by staff, and reducing manpower consumption; moreover, the pressure roller 250 is floatingly connected to the crossbeam 210 through the swing rod 240, so the pressure roller 250 will not hinder the lifting of the lifting platform 200, ensuring that the lifting of the lifting platform 200 can be maintained smoothly.

[0040] In some embodiments of this utility model, the guide wheel 220 is disposed below the side of the pressure wheel 250 facing away from the first box wall 110. In this way, there is a certain distance between the guide wheel 220 and the first box wall 110, leaving enough space between the sealing strip 400 and the first box wall 110 at the passage 212 for the connection between the first end 211 and the crossbeam 210, which is beneficial to the structural stability.

[0041] In some embodiments of this utility model, with the first box wall 110 relative to the lifting platform 200 on the left, the swing arm 240 is inclined downward from left to right. The lower right end of the swing arm 240 is hinged to the crossbeam 210, and the upper left end of the swing arm 240 is provided with a pressure roller 250. In this way, even if the elastic element fails or is damaged, the swing arm 240 and the pressure roller 250 will tend to swing towards the first box wall 110 under their own weight, and can still maintain pressure on the sealing strip 400.

[0042] In some embodiments of this utility model, the elastic element is a vertically arranged tension spring 230, with its top and bottom ends connected to the swing rod 240 and the crossbeam 210, respectively. The tension spring 230 is connected to the middle of the swing rod 240, and can apply a downward force to the swing rod 240, causing the swing rod 240 to tend to swing towards the first box wall 110; this structure is simple and easy to set up.

[0043] In some embodiments of this utility model, the first end 211, the clearance groove 111, the transmission mechanism, and the sealing mechanism are collectively referred to as end components, and end components are provided at both ends of the crossbeam 210. The two end components provided on the same crossbeam 210 are arranged in a left-right mirror symmetrical configuration; in this way, both ends of the crossbeam 210 can be subjected to the force driving the crossbeam 210 to rise and fall, the force on the crossbeam 210 is relatively balanced, and the structure is stable.

[0044] In some embodiments of this utility model, there are two crossbeams 210, which are arranged in parallel. The two crossbeams 210 are spaced apart from each other, and each crossbeam 210 has end components at both ends, so the sand box device has four end components. This makes the force on the lifting platform 200 more balanced, which is beneficial to the stable lifting of the lifting platform 200.

[0045] In some embodiments of this utility model, the drive assembly further includes a linkage mechanism. The linkage mechanism has an input end and four output ends. The input end is connected to the driver, and the four output ends are connected one-to-one to the four transmission mechanisms. In this way, the four transmission mechanisms can operate synchronously, so that the four first ends 211 rise and fall synchronously, which is beneficial to the stable raising and lowering of the lifting platform 200.

[0046] In some embodiments of this utility model, the linkage mechanism is located at the bottom of the inner box 100. This makes full use of the internal space of the inner box 100, resulting in a reasonable and compact structure, and the inner box 100 can also cover and protect the linkage mechanism.

[0047] In some embodiments of this utility model, outer protective shells 300 are provided on both the left and right sides of the inner box 100, forming a transmission space between the outer protective shells 300 and the inner box 100. Two transmission mechanisms located on the left side of the inner box 100 are both disposed within this transmission space, and two transmission mechanisms located on the right side of the inner box 100 are both disposed within this transmission space. The outer protective shells 300 provide a protective cover for the transmission mechanisms.

[0048] In some embodiments of this utility model, reference is made to Figure 2 The transmission mechanism includes a first gearbox 320 and a vertically arranged lead screw 310, which are sequentially connected between the first end 211 and the output end. The lead screw 310 includes a nut component and a vertically arranged lead rod component. The nut component is fixedly mounted on the first end 211, and the top of the lead rod component is connected to the inner housing 100. The first gearbox 320 is located at the bottom of the lead rod component and is fixedly connected to the inner housing 100. The input shaft of the first gearbox 320 extends laterally, penetrates the first housing wall 110, and connects to the output end. The output shaft of the first gearbox 320 extends vertically and connects to the bottom of the lead rod component. By using the lead screw 310 as the transmission mechanism, the transmission ratio between the output end and the first end 211 is precise and less prone to slippage. The synchronization performance among the four lead screws 310 is good, which is beneficial to the stable lifting and lowering of the lifting platform 200.

[0049] In some embodiments of this utility model, reference is made to Figure 4 The linkage mechanism includes a primary gearbox 350 and two secondary gearboxes 330. The input shaft of the primary gearbox 350 is the input end, and the input shafts of the two secondary gearboxes 330 are respectively connected to the two output shafts of the primary gearbox 350. The output shafts of the secondary gearboxes 330 are the output ends. The primary gearbox 350 and two secondary gearboxes 330 are fixedly mounted at the bottom of the inner housing 100. The driver is a motor 340, the main body of which is also fixedly mounted at the bottom of the inner housing 100. The input shaft of the primary gearbox 350 is located on its left side and connected to the drive shaft of the motor 340. The primary gearbox 350 has two output shafts, located at its front and rear sides respectively. The two output shafts of the primary gearbox 350 are connected to the input shafts of the two secondary gearboxes 330. Each secondary gearbox 330 has two output shafts, located at its left and right sides respectively. The two output shafts of one secondary gearbox 330 are connected to the input shafts of two primary gearboxes 320, and the two output shafts of the other secondary gearbox 330 are connected to the input shafts of the other two primary gearboxes 320. This gearbox linkage provides precise transmission ratios, reduces slippage, and facilitates the stable lifting of the lifting platform 200.

[0050] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A sand box device, characterized in that, include: A lifting platform with a crossbeam connected to its bottom, the crossbeam having a first end protruding from the edge of the lifting platform; The inner box is fitted around the outside of the lifting platform. The inner box has a first box wall, and the first box wall is provided with a clearance groove that is adapted to the first end. A drive assembly for driving the crossbeam to rise and fall, the drive assembly including a driver and a transmission mechanism connected between the first end and the driver, the transmission mechanism being located outside the inner box; The sealing mechanism includes a swing arm and a sealing strip. One end of the swing arm is hinged to the crossbeam, and the other end of the swing arm is provided with a pressure roller. An elastic element is connected between the swing arm and the crossbeam. A guide roller is provided below the pressure roller. The sealing strip covers the clearance groove. The sealing strip passes from top to bottom between the lifting platform and the first box wall, between the pressure roller and the first box wall, and on the side of the guide roller away from the first box wall. Both ends of the sealing strip are connected to the inner box.

2. The sand box device according to claim 1, characterized in that: The guide wheel is located below the pressure wheel on the side opposite to the first box wall.

3. The sand box device according to claim 1, characterized in that: With the first box wall relative to the lifting platform as the left, the swing arm is inclined downward from left to right.

4. The sand box device according to claim 2, characterized in that: The elastic element is a vertically arranged tension spring, and its top and bottom ends are connected to the swing arm and the crossbeam, respectively.

5. The sand box device according to claim 1, characterized in that: The first end, the clearance groove, the transmission mechanism and the sealing mechanism are collectively referred to as the end assembly, and the end assembly is provided at both ends of the crossbeam.

6. The sand box device according to claim 5, characterized in that: There are two crossbeams, and the two crossbeams are arranged in parallel.

7. The sand box device according to claim 6, characterized in that: The drive assembly also includes a linkage mechanism, which has an input end and four output ends. The input end is connected to the driver, and the four output ends are connected one-to-one to the four transmission mechanisms.

8. The sand box device according to claim 7, characterized in that: The linkage mechanism is located at the bottom of the inner box.

9. The sand box device according to claim 7, characterized in that: The transmission mechanism includes a first gearbox and a vertically arranged lead screw, which is sequentially connected between the first end and the output end.

10. The sand box device according to claim 7, characterized in that: The linkage mechanism includes a primary gearbox and two secondary gearboxes. The input shaft of the primary gearbox is the input end, and the input shafts of the two secondary gearboxes are respectively connected to the two output shafts of the primary gearbox. The output shaft of the secondary gearbox is the output end.

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