Secondary elastic pressing type powder pressing device

Abstract

The utility model discloses a secondary elastic pressing type powder pressing device. A pressing head is fixed at the bottom of a hollow guide column; a blocking piece is arranged between the hollow guide column and the pressing head and used for limiting the edge of the bowl. A top guide part is arranged in the force application end, a vertical counter bore is formed in a shaft core of the top guide part, a movable core is arranged in the vertical counter bore, a secondary pressure head is fixed to the bottom of the movable core, and a first pressure spring is arranged between the secondary pressure head and the top guide part; a limiting counter bore and a spring blocking part are arranged in the hollow guide column; a second pressure spring is arranged between the spring blocking part and the top guide piece; a radial hole is formed in the secondary pressing head, and an elastic component and a limiting marble are arranged in the radial hole. According to the coffee machine, through limiting of the blocking piece, it can be guaranteed that the pressing head and the secondary pressing head move in the axial direction to vertically extrude coffee powder, and uneven powder pressing caused by the incorrect powder pressing direction is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of coffee appliances, and in particular relates to a secondary spring-pressing type powder tamping device. Background Art

[0002] The tamper, also known as a tamping hammer, is one of the most commonly used tools in Italian coffee. The main function of the tamper is to flatten and compact the coffee powder in the handle so that the coffee powder forms a flat horizontal surface, allowing hot water to be extracted through the coffee powder better, and to allow the coffee powder to withstand the huge pressure generated by the coffee machine during extraction, so as not to be dispersed and affect the extraction quality.

[0003] Therefore, before making coffee, the loose coffee powder must be compacted by a certain amount of pressure so that the pressurized hot water can penetrate evenly. The specific technical problems encountered by actual pressed powder products in the prior art are summarized as follows: 1. The direction of pressed powder; 2. The magnitude of the force of pressed powder. First of all, the existing products have no positioning and guiding function. When pressing powder, the direction of pressed powder must be controlled by hand strength, and force must be applied vertically downward as much as possible. The coffee powder is often pressed obliquely, and the high-temperature and high-pressure hot water sprayed by the brewing head will seek to penetrate the layer with the least resistance, resulting in uneven extraction. The existing coffee powder is not squeezed tightly, and after squeezing, a channel effect is likely to occur, that is, the high-pressure and high-temperature liquid penetrates the coffee box in a columnar shape, which cannot promote the full extraction of coffee.

[0004] In response to the above-mentioned drawbacks, technical developers in this field, based on market feedback, believe that it is very necessary to make structural adjustments based on the existing powder compactor and to improve the powder compacting combination structure and stamping structure inside the powder compactor in order to solve the technical problems encountered in the prior art. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this patent application discloses a secondary spring-pressure powder pressing device, which adopts an internal axial guide structure to achieve vertical powder pressing. At the same time, by knocking the coffee powder during pressing, the coffee powder is made into a more dense state, thereby promoting coffee extraction.

[0006] To achieve the above technical objectives, the utility model adopts the following specific scheme: a secondary spring-pressure powder press, which includes a hollow guide column, a pressure head and a force-applying end, the pressure head is fixed at the bottom of the hollow guide column; on the upper part of the pressure head, a blocking member is movably arranged between the hollow guide column and the pressure head, and the outer diameter of the blocking member is larger than the outer diameter of the pressure head; a top guide member is arranged inside the force-applying end, a vertical countersunk hole is arranged at the axis core of the top guide member, a movable core is arranged in the vertical countersunk hole, a secondary pressure head is fixed at the bottom of the movable core, a first compression spring is arranged between the secondary pressure head and the top guide member; a limited countersunk hole and a spring blocking part are arranged inside the hollow guide column, and a second compression spring is arranged between the spring blocking part and the top guide member; a radial hole is arranged inside the secondary pressure head, a radial elastic component and a limiting marble are arranged in the radial hole, and the lower part of the radial hole is a variable diameter zone, and the lower diameter of the variable diameter zone is larger than the upper diameter.

[0007] The radial elastic component and the limiting marble are arranged in the limiting countersunk hole, and the lower part of the limiting countersunk hole is provided with a rounded transition, which can realize the sliding extrusion of the limiting marble.

[0008] The diameter-changing area at the bottom of the hollow guide column is a tapered hole, and the outer diameter of the secondary pressure head matches the inner diameter of the tapered hole.

[0009] The blocking member is arranged in a trumpet-shaped manner, and a guide cavity is arranged between the hollow guide column and the pressure head. An extrusion spring is movably arranged in the guide cavity, and the blocking member is constrained by the extrusion spring to be extruded on the top surface of the pressure head.

[0010] The beneficial effects of the utility model are as follows: the utility model discloses a secondary spring-pressure powder press, which fixes a pressing head at the bottom of a hollow guide column; a blocking member is arranged between the hollow guide column and the pressing head for limiting the edge of a bowl; a top guide member is arranged inside the force-applying end, a vertical countersunk hole is arranged at the axis core of the top guide member, a movable core is arranged in the vertical countersunk hole, a secondary pressing head is fixed at the bottom of the movable core, a first compression spring is arranged between the secondary pressing head and the top guide member; a limiting countersunk hole and a spring blocking part are arranged inside the hollow guide column, a second compression spring is arranged between the spring blocking part and the top guide member; a radial hole is arranged in the secondary pressing head, an elastic component and a limiting marble are arranged in the radial hole. When the utility model is in use, the pressure head and the secondary pressure head both move axially and are fixed at the lower part of the force-applying end. When force is applied, the limiting part of the blocking member can ensure that the pressure head and the secondary pressure head both move axially to vertically extrude the coffee powder, thereby preventing uneven pressing of the powder due to incorrect pressing direction. Furthermore, the utility model provides a radial elastic blocking member on the secondary pressure head, and the radial elastic blocking member constrains the secondary pressure head to overcome the radial constraint force under a certain axial thrust to achieve an instantaneous secondary impact, thereby promoting the compaction of the coffee powder through this knocking stamping method. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0014] Figure 4 This is a schematic diagram of the pressing structure of the utility model;

[0015] Figure 5 This is a schematic diagram of the secondary stamping structure of the utility model;

[0016] In the accompanying drawings, 1. hollow guide column, 11. limiting countersunk hole, 12. tapered hole, 13. spring blocking part, 2. force applying end, 21. internal threaded hole, 22. internal guide hole, 3. blocking member, 31. extrusion spring, 4. pressure head, 5. top guide member, 51. vertical countersunk hole, 6. movable core, 7. first compression spring, 8. second compression spring, 9. secondary pressure head, 91. top threaded hole, 92. radial hole, 93. radial spring, 94. limiting marble, 95. matching surface, 10. coffee bowl. DETAILED DESCRIPTION

[0017] The present invention is described in detail below through specific embodiments, but it should be pointed out that the following specific implementation methods do not impose technical limitations on the present technical solution, and those skilled in the art can make further technical extensions under the guidance of the following technical solution.

[0018] A secondary spring-pressing powder press, as shown in the attached drawings, comprises a hollow guide column 1, a pressure head 4 and a force-applying end 2. The pressure head 4 is a round pancake-shaped structure, a threaded blind hole is arranged on the top surface of the pressure head 4, and the pressure head 4 is threadedly fixed to the bottom of the hollow guide column 1; a blocking member 3 is movably arranged between the hollow guide column 1 and the pressure head 4 on the upper part of the pressure head 4, and the outer diameter of the blocking member 3 is larger than the outer diameter of the pressure head 4, as shown in FIG. Figure 3 , 4As shown in Figure 5, the purpose of the blocking member 3 is to achieve blocking and limiting with the top edge of the coffee bowl. The blocking member 3 can move axially on the outer diameter of the hollow guide column 1; the force-applying end 2 is spherical, and an internal threaded hole 21 and an internal guide hole 22 are provided inside the force-applying end 2. It is threadedly connected to the top guide member 5 through the internal threaded hole 21. The hollow guide column 1 is arranged in the internal guide hole 22 outside the top guide member 5 and can move axially. A vertical countersunk hole 51 is provided at the axis core of the top guide member 5, and a movable core 6 is provided in the vertical countersunk hole 51. The movable core 6 is a T-shaped structure, and an external thread is provided at the bottom thereof, which is locked together with the secondary pressure head 9 through the thread. A first compression spring 7 is provided between the secondary pressure head 9 and the bottom surface of the top guide member 5; a limiting countersunk hole 11 and a spring blocking portion 13 are provided inside the hollow guide column 1, and a second compression spring 8 is provided between the spring blocking portion 13 and the top guide member 5; a radial hole 92 is provided inside the secondary pressure head 9, and a radial spring 93 and a limiting marble 94 are provided in the radial hole 92. There are two limiting marbles 94 and they are provided on both sides of the radial spring 93. The lower part of the radial hole 92 is a variable diameter zone, and the lower diameter of the variable diameter zone is larger than the upper diameter. Furthermore, the radial spring 93 and the limiting marble 94 are arranged in the limiting counterbore 11, and the lower part of the limiting counterbore 11 is a rounded transition setting, and this rounded corner can realize the sliding extrusion of the limiting marble. Through the above structural setting, the radial spring 93 and the limiting marble 94 are arranged in the limiting counterbore 11, and a variable diameter area with a gradually increasing inner diameter is arranged at the lower part thereof. This design can reduce the trigger area of ​​the limiting marble 94. When the axial force is greater than the friction force when the radial spring 93 squeezes the limiting marble 94, the limiting marble 94 can be used as a trigger switch of the secondary pressure head 9 to be instantly excited. When the secondary pressure head 9 impacts vertically, the resistance of the limiting marble 94 can be reduced to a minimum. Furthermore, according to the analysis after the actual operation of the product, when the axial movement of the limiting marble 94 is combined with the radial movement, it is best to be combined with the variable diameter area on the hollow guide column 1 in a linear running state. Therefore, the utility model designs the variable diameter area at the bottom of the hollow guide column 1 as a tapered hole 12, and the outer diameter of the secondary pressure head 9 matches the inner diameter of the tapered hole 12. This design can achieve that when the axial movement of the limiting marble 94 is combined with the radial movement, the limiting marble 94 is always in a linear running state and is tightly fitted with the inner wall of the variable diameter area on the hollow guide column 1, and the extrusion pressure from the limiting marble 94 to the inner wall of the variable diameter area gradually decreases.

[0019] Furthermore, the utility model designs the blocking member 3 to be in a trumpet shape, and a guide cavity is provided between the hollow guide column 1 and the pressure head 4. The guide cavity is composed of the outer diameter of the hollow guide column 1 and the notch on the inner diameter of the blocking member 3. An extrusion spring 31 is movably provided in the guide cavity, and the extrusion spring 31 constrains the blocking member 3 to always be pressed on the top surface of the pressure head 4.

[0020] When the utility model is used, Figure 3 , 4 As shown in Figure 5, the user places the device into a coffee bowl 10 filled with coffee powder, supports it to the top edge of the coffee bowl 10 through the bottom surface of the blocking member 3, and then presses and applies force through the force-applying end 2. The top guide member 5 simultaneously applies force to press the first compression spring 7 and the second compression spring 8. The top guide member 5 causes the hollow guide column 1 to carry the pressure head 4 with flexible buffering through the first compression spring 7, and the second compression spring 8 applies force to the top of the secondary pressure head 9. At this time, the radial spring 93 and the limiting marble 94 are radially squeezed outside the limiting counterbore 11 to constrain the secondary pressure head 9 to remain motionless. When the force applied by the force-applying end 2 is large enough, the second compression spring 8 is squeezed into place, and the axial force applied by the second compression spring 8 is greater than the friction force of the radial spring 93 when squeezing the limiting marble 94. The limiting marble 94 can be used as a trigger switch of the secondary pressure head 9 to be instantly excited. At this time, the secondary pressure head 9 knocks the pressure head 4, thereby realizing the hammering of the coffee powder. Repeating this action many times can realize the compaction of the coffee powder.

[0021] In summary, the utility model forms a radial elastic blocking member by arranging a radial spring 93 and a limiting marble 94 on the secondary pressure head 9. The radial elastic blocking member constrains the secondary pressure head 9 to overcome the radial constraint force under a certain axial thrust to achieve an instantaneous secondary impact. The pressure head 4 cooperates with the secondary pressure head 9 to achieve axial and multiple knocks on the coffee powder, which can ensure that the powder surface is flat and the coffee powder has a good density, thereby effectively solving the drawbacks of the prior art.

Claims

1. A secondary spring-pressed powder press, characterized in that: It includes a hollow guide column, a pressure head and a force-applying end; the pressure head is fixed at the bottom of the hollow guide column; A blocking member is movably arranged on the upper part of the pressure head between the hollow guide column and the pressure head, and the outer diameter of the blocking member is larger than the outer diameter of the pressure head; A top guide is provided inside the force-applying end, a vertical countersunk hole is provided at the axis core of the top guide, a movable core is provided in the vertical countersunk hole, a secondary pressure head is fixed at the bottom of the movable core, and a first compression spring is provided between the secondary pressure head and the top guide; A limited countersunk hole and a spring blocking part are arranged inside the hollow guide column, and a second compression spring is arranged between the spring blocking part and the top guide member; a radial hole is arranged inside the secondary pressure head, and a radial elastic component and a limiting marble are arranged in the radial hole, and the lower part of the radial hole is a variable diameter zone, and the lower diameter of the variable diameter zone is greater than the upper diameter.

2. The secondary spring-pressing powder press as claimed in claim 1, characterized in that: The radial elastic component and the limiting marble are arranged in the limiting countersunk hole, and the lower part of the limiting countersunk hole is arranged with a rounded corner transition.

3. The secondary spring-pressing powder press as claimed in claim 1, characterized in that: The diameter-changing area at the bottom of the hollow guide column is a tapered hole, and the outer diameter of the secondary pressure head matches the inner diameter of the tapered hole.

4. The secondary spring-pressing powder press as claimed in claim 1, characterized in that: The blocking member is arranged in a trumpet-shaped manner, and a guide cavity is arranged between the hollow guide column and the pressure head. An extrusion spring is movably arranged in the guide cavity, and the blocking member is constrained by the extrusion spring to be extruded on the top surface of the pressure head.

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