阅读说明：本技术 一种大长径比的多级活塞结构 (Multistage piston structure with large length-diameter ratio ) 是由 袁晓鑫 宗贵升 赵浩 李全贵 于 2020-06-03 设计创作，主要内容包括：本发明公开了一种大长径比的多级活塞结构,多级活塞结构设置于成型缸内；多级活塞结构包括：顶层活塞,底层活塞,底层活塞设置于成型缸的底板上方；电机,电机设有多个,分别设于顶层活塞和底层活塞的顶部；丝杠,丝杠为多个,且与电机的数量和位置对应,且设于顶层活塞和底层活塞的底部,丝杠的一端穿过对应的顶层活塞或/和底层活塞与电机的输出端传动连接；丝杠的另一端,穿过对应的顶层活塞或/和底层活塞及成型缸的底板,延伸至成型缸的下方。本发明中的活塞结构可以有效增加活塞z向行程,且方便操作。(The invention discloses a multi-stage piston structure with a large length-diameter ratio, which is arranged in a forming cylinder; the multi-stage piston structure includes: the top layer piston and the bottom layer piston are arranged above the bottom plate of the forming cylinder; the motors are arranged on the tops of the top layer piston and the bottom layer piston respectively; the number of the lead screws corresponds to the number and the positions of the motors and are arranged at the bottoms of the top layer pistons and the bottom layer pistons, and one end of each lead screw penetrates through the corresponding top layer piston or/and bottom layer piston to be in transmission connection with the output end of each motor; the other end of the screw rod passes through the corresponding top layer piston or/and bottom layer piston and the bottom plate of the forming cylinder and extends to the lower part of the forming cylinder. The piston structure can effectively increase the z-direction stroke of the piston and is convenient to operate.)

1. A multi-stage piston structure with a large length-diameter ratio is arranged in a forming cylinder (2); it is characterized by comprising:

a top layer piston (1),

the bottom layer piston (3), the bottom layer piston (3) is arranged above the bottom plate (21) of the forming cylinder (2);

a plurality of motors (4) are arranged, and are respectively arranged at the tops of the top layer piston (1) and the bottom layer piston (3);

the number of the lead screws (5) is multiple, the lead screws correspond to the number and the positions of the motors (4), the lead screws are arranged at the bottoms of the top layer pistons (1) and the bottom layer pistons (3), and one end of each lead screw (5) penetrates through the corresponding top layer piston (1) or/and bottom layer piston (3) to be in transmission connection with the output end of each motor (4); the other end of the screw rod (5) penetrates through the corresponding top layer piston (1) or/and bottom layer piston (3) and the bottom plate (21) of the forming cylinder (2) and extends to the lower part of the forming cylinder (2).

2. The multi-stage piston structure with large length-diameter ratio according to claim 1 is characterized in that a piston top plate (6) for placing a model is arranged above the top-layer piston (1).

3. A multi-stage piston structure with large length-diameter ratio according to claim 2, characterized in that the top piston (1) is provided with a cylindrical first supporting plate (7) at the top edge, and the piston top plate (6) is placed on the top of the first supporting plate (7).

4. A high slenderness ratio multistage piston construction according to claim 3, characterized in that the height of the first support plate (7) is higher than the height of the motor (4).

5. A multi-stage piston structure with large length-diameter ratio according to any one of claims 1-4, characterized in that a middle-stage piston (8) is arranged between the top-stage piston (1) and the bottom-stage piston (3); the top of intermediate level piston (8) sets up motor (4), the bottom output of motor (4) is connected with lead screw (5).

6. The multistage piston structure with the large length-diameter ratio according to claim 5, characterized in that a plurality of the intermediate layer pistons (8) are arranged, and the plurality of the intermediate layer pistons (8) are sequentially arranged in a stacked manner.

7. A multi-stage piston arrangement with a large length to diameter ratio according to claim 6, characterised in that a second cylindrical support plate (9) is provided at the edge of the top of the lower (3) and intermediate (8) stage pistons for supporting the upper stage pistons.

8. The multistage piston structure with the large length-diameter ratio according to claim 7, wherein first through holes are formed in the surfaces of a bottom plate (21) of the forming cylinder (2), the bottom layer piston (3) and the middle layer piston (8), a threaded sleeve bearing (11) used for supporting the screw rod (5) to move up and down is arranged in each first through hole, and the threaded sleeve bearing (11) is in threaded connection with the screw rod (5).

9. The multistage piston structure with the large length-diameter ratio according to claim 8, characterized in that the surfaces of the bottom plate (21) of the forming cylinder (2), the bottom layer piston (3) and the middle layer piston (8) are provided with second through holes (12) for the lead screw (5) to directly pass through.

10. The multistage piston structure with large length-diameter ratio according to claim 9, characterized in that the surfaces of the middle-layer piston (8) and the top-layer piston (1) are provided with third through holes (10) for the motor (4) to pass through, and the height of the second support plate (9) is smaller than that of the motor (4).

Technical Field

The invention relates to the technical field of pistons, in particular to a multi-stage piston structure with a large length-diameter ratio.

Background

In order to pursue high efficiency and process large-size workpieces, the equipment tends to be larger and larger, the moving space of a piston in a forming cylinder of the equipment also needs to be properly adjusted, wherein the directions x and y are well solved, the Z direction is mostly limited by the principle because a single-stage piston driving mode of a lead screw at the lower part of the piston is adopted, the stroke of the piston in the Z direction cannot exceed the length of the lead screw at the lower part of the piston, if the effective stroke of the piston in the Z direction is larger than 500mm, the length of the lead screw is more than 650mm by the factors of the thickness of the piston, the length of a linear bearing and the like, when the piston moves downwards, a proper distance is reserved between the forming cylinder and the ground, so that the piston can move to the lowest end of the forming cylinder, therefore, the actual height of a processing platform of the equipment to the ground is more than 1250mm, and the processing platform is high, the problem that the z-direction stroke of the piston is small, and meanwhile, the processing platform is high, so that the printing operation is not convenient.

Therefore, it is an urgent need to solve the above-mentioned problems by those skilled in the art to develop a multi-stage piston structure with a large length-diameter ratio, which can effectively increase the z-direction stroke of the piston and is convenient to operate.

Disclosure of Invention

In view of this, the invention provides a multi-stage piston structure with a large length-diameter ratio, which can effectively increase the z-direction stroke of the piston and is convenient to operate.

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

a multi-stage piston structure with a large length-diameter ratio is arranged in a forming cylinder; the multi-stage piston structure includes:

the piston at the top layer is provided with a piston,

the bottom layer piston is arranged above the bottom plate of the forming cylinder;

a plurality of motors are arranged and are respectively arranged on the tops of the top layer piston and the bottom layer piston;

the number of the lead screws is multiple, the lead screws correspond to the number and the positions of the motors and are arranged at the bottoms of the top layer piston and the bottom layer piston, and one end of each lead screw penetrates through the corresponding top layer piston or/and the corresponding bottom layer piston to be in transmission connection with the output end of each motor; the other end of the lead screw penetrates through the corresponding top layer piston or/and bottom layer piston and the bottom plate of the forming cylinder and extends to the lower part of the forming cylinder.

The technical scheme has the advantages that the top layer piston is arranged above the bottom layer piston, when the bottom layer piston and the top layer piston are arranged at the bottom of the forming cylinder, the bottom layer piston and the screw rods on the top layer piston are arranged between the bottom of the forming cylinder and the ground, when the top layer piston rises to the topmost layer, the bottom of the screw rod of the top layer piston is arranged at the bottom layer piston, and the sum of the moving distance of the screw rod at the bottom layer piston and the moving distance of the screw rod at the top layer piston is the total stroke of the piston structure. The piston has a simple structure, can increase the stroke, does not increase the distance between the forming cylinder and the ground while increasing the stroke, and is more convenient to operate.

Preferably, a piston top plate for placing the model is arranged above the top piston.

Preferably, a first cylindrical support plate is arranged at the edge of the top piston top, and the piston top plate is arranged at the top of the first support plate.

Preferably, the height of the first supporting plate is higher than that of the motor, so that the motor at the top of the top piston is positioned below the top of the piston, and the influence of the motor on a model placed on the top plate of the piston is avoided.

Preferably, a middle-layer piston is arranged between the top-layer piston and the bottom-layer piston, the motor is arranged at the top of the middle-layer piston, and the bottom output end of the motor is connected with the screw rod.

The middle layer piston is provided with a plurality of, and a plurality of the middle layer pistons are stacked in sequence.

Preferably, a cylindrical second support plate for supporting the upper piston is provided at the edge of the top of each of the lower and middle pistons. The second support plate enables a certain distance to exist between the bottom piston and the middle piston, between the adjacent middle pistons and between the middle piston and the top piston.

Preferably, the bottom plate, the bottom piston and the middle piston of the forming cylinder are provided with first through holes, the first through holes are internally provided with threaded sleeve bearings for supporting the screw rod to move up and down, and the threaded sleeve bearings are in threaded connection with the screw rod. The lead screw rotates under the effect of motor, lead screw and swivel nut bearing threaded connection, and the relative swivel nut bearing of lead screw pivoted in-process reciprocates.

Preferably, the surfaces of the bottom plate, the bottom piston and the middle piston of the forming cylinder are provided with second through holes for the lead screw to directly pass through. The second through hole is convenient for the up-and-down movement of the screw rod.

Preferably, the surfaces of the middle layer piston and the top layer piston are provided with third through holes for the motor to pass through, and the height of the second supporting plate is smaller than that of the motor. When the bottom piston, the middle piston and the top piston are all located at the bottom of the forming cylinder, the motor penetrates through the third through hole, the distance between the bottom piston, the middle piston and the top piston can be reduced, and the stroke of the whole piston structure can be increased.

According to the technical scheme, compared with the prior art, the invention discloses a multi-stage piston structure with a large length-diameter ratio, which has the beneficial effects that:

(1) according to the invention, the bottom piston rises on the basis of the bottom plate of the forming cylinder, the middle piston rises on the basis of the bottom piston, and the top piston rises on the basis of the middle piston, so that the total stroke of the piston structure can be greatly improved without changing the distance between the forming cylinder and the ground;

(2) a plurality of lead screws and motors are arranged on the bottom piston, the middle piston and the top piston, so that each layer of piston is more stable when moving up and down.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural view of a two-layer piston structure according to the present invention in a contracted state;

FIG. 2 is a schematic illustration of a two-layered piston structure according to the present invention in an expanded state;

FIG. 3 is a top view of a two-layer piston motor arrangement according to the present invention;

FIG. 4 is a schematic structural view of a three-layer piston structure according to the present invention in a contracted state;

FIG. 5 is a schematic illustration of a three-layered piston structure according to the present invention in an expanded state;

fig. 6 is a top view of the arrangement of the three-layer piston motor according to the present invention.

Wherein, in the figure,

1-top piston;

2-forming a cylinder;

21-a bottom plate;

3-a bottom piston; 4-a motor; 5-a lead screw; 6-piston top plate; 7-a first support plate; 8-middle layer piston; 9-a second support plate; 10-a third via; 11-a swivel nut bearing; 12-second via.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.