CN220800739U - Juice extracting assembly and juice extractor - Google Patents

Abstract

The application belongs to the field of juice squeezing equipment, and particularly relates to a juice squeezing assembly and a juice squeezing machine. The juice squeezing component can retain the nutritive value of fruits and vegetables, and has simple operation and high juice squeezing efficiency.

Description

Juice extracting assembly and juice extractor

Technical Field

The application relates to the technical field of juicing equipment, in particular to a juicing assembly and a juicer.

Background

For healthy living, more and more people like to directly make and drink vegetable and fruit juice at home, and a large number of devices capable of simply squeezing juice from vegetables or fruits are also on the market. At present, the juice extracting devices on the market mainly have the following two structural forms:

One is a centrifugal juicer which pulverizes vegetables and fruits from which juice is to be extracted by a pulverizing device and then throws the juice out by centrifugal force in a rotating manner. The juice extraction method has the major defects that the inherent taste and nutrition contained in the vegetables and fruits are destroyed and a large amount of plant fibers are lost in the processes of crushing the vegetables and fruits and separating juice.

Another is a screw extrusion type juice extractor, which utilizes a screw structure to extrude vegetables and fruits to be extracted, thereby separating juice. The method has the defects that fruits and vegetables are manually cut into small pieces and then put into a feeding port, the operation is complex, and the juice extracting speed is low.

Disclosure of utility model

The embodiment of the application provides a juice squeezing assembly and a juice squeezing machine, which aim to ensure that squeezed juice has higher nutritive value, and meanwhile, the operation is simple and the juice yield is high.

To this end, according to an aspect of the present application, there is provided a juice extractor assembly comprising a cup body, a screw press head and a cutter blade disposed in the cup body, wherein the rotational speed of the cutter blade is configured to be greater than that of the screw press head, a receiving chamber is provided in the screw press head, a through hole communicating with the receiving chamber is provided in the screw press head, the cutter blade comprises a cutting portion and a rotating shaft portion connected with the cutting portion, the cutting portion is located outside the receiving chamber, the rotating shaft portion is rotatably connected with the through hole, one end of the rotating shaft portion away from the cutting portion is connected with a first coupler, and the first coupler is at least partially disposed in the receiving chamber.

Optionally, the shaft portion is coaxially arranged with the screw press head.

Optionally, the ratio of the rotational speed of the cutting blade to the rotational speed of the screw press head is configured to be 5-1000.

Optionally, the rotational speed of the cutting blade is configured to be 1000rpm-30000rpm.

Optionally, the rotation speed of the screw press head is configured to be 30rpm-3000rpm.

Optionally, the screw press head extends outwardly beyond an end of the cutting blade to form a flange that abuts an end of the cup in an axial direction to limit axial movement of the screw press head.

Optionally, the cutting portion divides the inside of cup into cutting chamber and lower extrusion chamber, just be provided with the clearance between the week side of cutting portion and the inner wall of cup, the clearance forms and is used for with upper cutting chamber with lower extrusion chamber upper and lower annular feed opening that switches on.

Optionally, the juice extracting assembly further comprises a liquid collecting cup, a plurality of exudation holes are formed in the side face of the lower extrusion cavity on the cup body, the liquid collecting cup is sleeved on the outer side of the cup body corresponding to the lower extrusion cavity, a liquid collecting cavity is formed between the inner wall of the liquid collecting cup and the outer wall of the cup body, and a juice outlet communicated with the liquid collecting cavity is further formed in the liquid collecting cup.

According to another aspect of the application, there is provided a juice extractor comprising a main machine, wherein a power take-off assembly is arranged on the main machine, the juice extractor assembly as described above is arranged in the cup body, and the power take-off assembly is connected with the juice extractor assembly and is used for driving the screw press head and the cutting knife to rotate.

Optionally, the power output assembly comprises a first output shaft and a second output shaft, wherein the first output shaft is provided with a second coupler coupled with the first coupler, and the second output shaft is connected with the screw press head.

Optionally, the power output assembly is provided with at least one positioning piece for positioning the first output shaft in the accommodating cavity.

Optionally, the second output shaft is at least partially disposed in the accommodating cavity, and a maximum outer diameter of a joint of the second output shaft and the screw press head is greater than half of an inner diameter of the accommodating cavity.

Optionally, the power take off assembly includes the motor and set up in the epaxial derailleur of pivot of motor, the pivot of motor run through the derailleur and be provided with the coupling in the second coupler of first coupler, the input of derailleur connect in the pivot of motor, the output of derailleur connect in the screw press head.

Optionally, a positioning part is arranged between the first coupler and the second coupler.

Optionally, the diameter of the coupler positions of the first coupler and the second coupler is 15mm-100mm.

The juicing component and the juicer provided by the application have the beneficial effects that: compared with the prior art, the juice squeezing assembly comprises the spiral squeezing head and the cutting knife which is rotatably arranged on the spiral squeezing head, fruits and vegetables put into the cup body are firstly cut by the cutting knife by driving the spiral squeezing head and the cutting knife to rotate at different rotating speeds, the cut fruits and vegetables are ground and squeezed by the spiral squeezing head, juice in the juice squeezing assembly is squeezed, the nutritional value in the fruits and vegetables can be reserved, the operation is simple, and the juice squeezing efficiency is high. The first coupler on the rotating shaft part of the cutting blade is at least partially arranged in the accommodating cavity of the screw press head, so that the length of the rotating shaft part is reduced, and the running stability of the cutting blade is improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is a schematic view of the internal structure of a juice extractor assembly according to an embodiment of the present application;

FIG. 2 is a schematic view showing the connection structure of a screw press head, a cutter blade and a first coupler in a juice extraction assembly according to an embodiment of the present application;

FIG. 3 is a schematic view showing an external structure of a juice extractor according to an embodiment of the present application;

Fig. 4 is a schematic view illustrating an internal structure of a juice extractor according to an embodiment of the present application;

Fig. 5 is a schematic view showing connection of a power take-off assembly with a screw press head and a cutter in a juice extractor according to an embodiment of the present application.

Description of main reference numerals:

10. A juice extraction assembly;

20. A host;

30. a power take-off assembly;

100. a cup body; 101. an upper cutting cavity; 102. a lower extrusion chamber; 103. a gap;

200. A screw press head; 201. a receiving chamber; 202. a through hole; 210. a flange;

300. A cutting blade; 310. a cutting portion; 320. a rotating shaft portion;

400. A first coupler;

500. a liquid collecting cup; 501. a liquid collection cavity; 502. a juice outlet;

600. A bearing;

700. A second coupler;

800. a motor; 810. a rotating shaft;

900. A transmission; 910. an output shaft; 920. a first gear; 930. a gear ring; 940. a first planet; 950. a first planet carrier; 960. a second gear; 970. a second planet wheel; 980. and a second carrier.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many other 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 "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

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 application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It should be further noted that, in the embodiments of the present application, the same reference numerals denote the same components or the same parts, and for the same parts in the embodiments of the present application, reference numerals may be given to only one of the parts or the parts in the drawings, and it should be understood that, for other same parts or parts, the reference numerals are equally applicable.

In order to solve the above problems, an embodiment of the present application provides a juice extracting assembly, as shown in fig. 1, the juice extracting assembly 10 includes a cup body 100, a screw press head 200 and a cutter 300 disposed in the cup body 100, the rotational speed of the cutter 300 is configured to be greater than that of the screw press head 200, a receiving cavity 201 is disposed in the screw press head 200, a through hole 202 communicating with the receiving cavity 201 is disposed on the screw press head 200, the cutter 300 includes a cutting part 310 and a rotating shaft part 320 connected with the cutting part 310, the cutting part 310 is disposed outside the receiving cavity 201, the rotating shaft part 320 is rotatably connected with the through hole 202, one end of the rotating shaft part 320 away from the cutting part 310 is connected with a first coupler 400, and the first coupler 400 is at least partially disposed in the receiving cavity 201.

In the embodiment of the present application, the juice extracting assembly 10 includes a screw press head 200 and a cutter 300 rotatably disposed on the screw press head 200, and by driving the screw press head 200 and the cutter 300 to rotate at different rotational speeds, fruits and vegetables put into the cup 100 are firstly cut by the cutter 300 rotating at a high speed, and the cut fruits and vegetables are then ground and extruded by the screw press head 200 rotating at a low speed, so that juice is extracted, nutritional value of the fruits and vegetables can be maintained, the operation is simple, and the juice extracting efficiency is high. The first coupler 400 on the rotating shaft portion 320 of the cutter 300 is at least partially disposed in the accommodating cavity 201 of the screw press head 200, which is beneficial to shortening the length of the rotating shaft portion 320 and improving the running stability of the cutter 300, meanwhile, in the juice extractor, the power output assembly 30 connected with the screw press head 200 can extend into the accommodating cavity 201, so that the screw press head 200 can run more stably, and the running stability of the cutter 300 can be improved because the cutter 300 is rotatably disposed on the screw press head 200.

Further, the rotational connection between the shaft portion 320 and the through hole 202 may be achieved through the bearing 600 to reduce friction.

In one implementation, as shown in fig. 1 and 2, the first coupler 400 is completely accommodated in the accommodating cavity 201, and the portion of the screw press head 200 around the through hole 202 is located between the cutting part 310 and the first coupler 400 at the upper limit in the axial direction, and the cutting part 310 of the first coupler 400 and the cutting blade 300 are used for axially limiting the screw press head 200, so that the whole juice extracting assembly is compact in structure, and meanwhile, the reliability of connection between the screw press head 200 and the cutting blade 300 is improved.

In one embodiment, as shown in fig. 1-2, the shaft portion 320 is disposed coaxially with the screw press head 200.

The design can ensure that the whole stress is even when the juicing component 10 works, and in addition, the structural design of the cup body 100 is also convenient, namely, the cup body 100 can be designed into a cylindrical structure, and the cutting knife 300, the spiral squeezing head 200 and the cup body 100 are coaxially arranged.

In one embodiment, as shown in FIG. 2, cutting portion 310 includes a disc and a cutter head secured to a side of the disc facing away from spindle portion 320. It will be appreciated that in other embodiments, the structure of the cutting portion 310 may be designed into other shapes, and the cutting portion 310 may be formed by intersecting several S-shaped or U-shaped stirring cutters at the middle, which is not limited herein, so long as the cutting portion can perform a rotary cutting function.

In a specific embodiment, the ratio of the rotational speed of the cutting blade 300 to the rotational speed of the screw press head 200 is configured to be 5-1000.

Because the working process of the juicer is divided into rapid cutting and then slow screw extrusion, when the cutting speed of the cutter 300 is greater than the pressing speed of the screw press head 200, food accumulation can occur in the cup 100 and the food can not be discharged; when the cutting speed of the cutter 300 is lower than the pressing speed of the screw press head 200, the overall juice extracting speed is affected, power consumption is increased, and the like. In order to more reasonably consider both the juice extracting speed and the juice extracting effect, the working efficiency of the cutter 300 and the screw press head 200 must be matched to optimize the juice extracting efficiency, and in summary, the ratio of the rotation speed of the cutter 300 to the rotation speed of the screw press head 200 is set to be 5-1000, preferably 20-200.

In a specific embodiment, the rotational speed of the cutting blade 300 is configured to be 1000rpm-30000rpm and/or the rotational speed of the screw press head 200 is configured to be 30rpm-3000rpm.

In the related art, the rotation speed of a single-cutter juicer (i.e., a centrifugal juicer) is high, and the rotation speed of a single-screw juicer (i.e., a screw-extrusion juicer) is low. In the cutting assembly of the present embodiment, the rotation speed of the cutting blade 300 is suitably lowered and the rotation speed of the screw press head 200 is suitably raised in order to comprehensively consider the control noise.

In one embodiment, as shown in FIG. 1, the screw press head 200 extends outwardly from the end of the cutting blade 300 to form a flange 210, the flange 210 axially abutting one end of the cup 100 to limit axial movement of the screw press head 200.

The axial stability of the screw press head 200 is further improved by the engagement of the flange 210 at the end of the screw press head 200 with the end of the cup 100, so that the screw press head 200 and the cup 100 are prevented from moving relative to each other in the axial direction.

In one embodiment, as shown in fig. 1, the cutting part 310 divides the inside of the cup body 100 into an upper cutting chamber 101 and a lower pressing chamber 102, and a gap 103 is provided between the peripheral side of the cutting part 310 and the inner wall of the cup body 100, the gap 103 forming an annular blanking port for vertically communicating the upper cutting chamber 101 and the lower pressing chamber 102.

Through setting up clearance 103 between cutting portion 310 and the inner wall of cup 100, utilize the annular feed opening that this clearance 103 formed, directly vertically switch on the last cutting chamber 101 that is located cutting portion 310 and the lower extrusion chamber 102 that is located cutting portion 310 below, design from this, the juice extraction material after cutting portion 310 cuts up in the last cutting chamber 101 can directly fall into lower extrusion chamber 102 through annular feed opening, makes things convenient for the unloading, is favorable to improving the juice extraction efficiency of juice extractor. Preferably, the gap 103 is set to 0.2mm-20mm.

In addition, it can be appreciated that the juice extractor assembly 10 has the advantages of simple structure and easy assembly, since the cutter 300 and the screw press head 200 are disposed in the same cup 100, and the inner space of the cup 100 is partitioned to form the upper cutting chamber 101 and the lower pressing chamber 102 by the cutting part 310.

In a specific embodiment, referring to fig. 1, the juice extracting assembly 10 further includes a liquid collecting cup 500, a plurality of exudation holes are disposed on the side surface of the cup body 100 located on the lower extrusion cavity 102, the liquid collecting cup 500 is sleeved on the outer side of the cup body 100 corresponding to the lower extrusion cavity 102, a liquid collecting cavity 501 is formed between the inner wall of the liquid collecting cup 500 and the outer wall of the cup body 100, and a juice outlet 502 communicated with the liquid collecting cavity 501 is further disposed on the liquid collecting cup 500.

The inner wall of the cup body 100 is provided with a blanking rib, the screw press head 200 comprises a body and a screw convex rib arranged on the outer surface of the body, the screw convex rib is in contact with the blanking rib, the screw convex rib is distributed above the flange 210 from the top of the body, and the lower end of the blanking rib extends to the lower end of the cup body 100 and is attached to the flange 210; in addition, the upper surface of the flange 210 is provided with a notch, which forms a slag discharge port with the lower end of the cup body 100, and the slag discharge port has a bar shape. In operation of the juice extractor assembly 10, the screw press head 200 rotates to press and push the fruit and vegetable which is cut by the cutter blade 300, on one hand, the squeezed juice seeps out from the seeping hole into the liquid collecting cavity 501, flows out through the juice outlet 502 on the liquid collecting cup 500, and on the other hand, the residue is pushed to the upper surface of the flange 210 by the screw rib screw, and then is discharged along the slag discharging channel through the slag discharging hole.

According to another aspect of the present application, as shown in fig. 3-4, the embodiment of the present application further provides a juice extractor, which includes a main machine 20, a power output assembly 30 is disposed on the main machine 20, the juice extracting assembly 10 in any of the above embodiments is disposed in the cup body 100, and the power output assembly 30 is connected to the juice extracting assembly 10 to drive the screw press head 200 and the cutting blade 300 to rotate.

In the embodiment of the present application, the juice extractor employs the juice extracting assembly 10 in the above embodiment, so that the juice extracting assembly 10 in the above embodiment has advantages and benefits accordingly, which are not described herein.

In one embodiment, as shown in fig. 4, the power take-off assembly 30 comprises a first output shaft on which is disposed a second coupler 700 coupled to a first coupler 400, and a second output shaft connected to the screw press head 200.

By the above arrangement, the cutter 300 and the screw press head 200 are correspondingly driven by the first output shaft and the second output shaft of the power output assembly 30, respectively, with a simple structure.

In a specific embodiment, the power take-off assembly 30 is provided with at least one positioning member for positioning the first output shaft within the receiving cavity 201. Through setting up the setting element, avoid the operation in-process first output shaft to appear rocking, be favorable to improving first output shaft's stability.

In a specific embodiment, the second output shaft is at least partially disposed within the receiving cavity 201, and the maximum outer diameter of the second output shaft at the junction with the screw press head 200 is greater than half the inner diameter of the receiving cavity 201. It will be appreciated that the larger the diameter of the connection between the second output shaft and the screw press head 200, the more stable the screw press head 200 operates, the more stable the cutting blade 300 operates, and thus the more uniform the blanking of the annular blanking opening.

As shown in fig. 4 and 5, the power output assembly 30 includes a motor 800 and a transmission 900 provided on a rotation shaft 810 of the motor 800, the rotation shaft 810 of the motor 800 penetrates the transmission 900 and is provided with a second coupler 700 coupled to the first coupler 400, an input end of the transmission 900 is connected to the rotation shaft 810 of the motor 800, and an output end of the transmission 900 is connected to the screw press head 200.

The transmission 900 includes an output shaft 910, a first gear 920, a ring gear 930, a first planet gear 940, a first planet carrier 950, a second gear 960, a second planet gear 970, and a second planet carrier 980, the first gear 920 is fixed at the lower end of the rotating shaft 810, the output shaft 910 is in a sleeve shape, the ring gear 930 is disposed between the rotating shaft 810 and the output shaft 910, the first planet carrier 950 and the second planet carrier 980 are disposed in the ring gear 930 and respectively connected to the rotating shaft 810 in a rotating manner, the second gear 960 is fixed on the first planet carrier 950, the first planet gears 940 are rotatably disposed on the first planet carrier 950 and are engaged with the first gear 920 and the ring gear 930, the second planet gears 970 are rotatably disposed on the second planet carrier 980 and are engaged with the second gear 960 and the ring gear 930, and the second planet carrier 980 is fixedly connected to the output shaft 910. The second carrier 980 forms the positioning member described above for positioning the first output shaft. The first gear 920 serves as an input end of the transmission 900, the rotation shaft 810 of the motor 800 forms the first output shaft, and the output shaft 910 of the transmission 900 forms the second output shaft.

In some embodiments, as shown in fig. 5, a positioning portion is provided between the first coupler 400 and the second coupler 700. The concentric coupling between the first coupler 400 and the second coupler 700 is ensured by the positioning part, which is favorable for reducing noise, and meanwhile, the cutting blade 300 is ensured to run more stably, and the cutting effect is improved.

Specifically, the shaft portion 320 of the cutting blade 300 is a hollow shaft, through holes corresponding to the inside of the hollow shaft are formed in the first coupler 400 and the second coupler 700, and the shaft 810 of the motor 800 is inserted into the hollow shaft through the through holes in the second coupler 700, so that positioning between the first coupler 400 and the second coupler 700 is achieved.

In a specific embodiment, the diameter of the coupler bits of the first coupler 400 and the second coupler 700 is 15mm-100mm

It will be appreciated that the larger the coupling area between the first coupler 400 and the second coupler 700, the more stable the transmission, and the finer and more uniform the cut food material. And the smaller the noise is in the working process, the longer the service life of the product is. However, the excessive coupling area may cause the first coupler 400 and the second coupler 700 to be bulky, affect the product size, and be poor in economical efficiency, and thus, the diameter of the coupler positions of the first coupler 400 and the second coupler 700 is set to 15mm-100mm in consideration of the combination.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.

Claims (15)

1. A juice extractor assembly, characterized by: including the cup and set up in screw press head and cutting sword in the cup, the rotational speed of cutting sword is configured to be greater than screw press head's rotational speed, screw press head's inside is provided with the accommodation chamber, screw press head is last be provided with the through-hole of accommodation chamber intercommunication, the cutting sword include cutting portion and with the pivot portion that cutting portion is connected, cutting portion is located outside the accommodation chamber, pivot portion with the through-hole rotates to be connected, the pivot portion is kept away from the one end of cutting portion is connected with first coupler, first coupler at least part set up in the accommodation intracavity.

2. The juice extractor assembly of claim 1, wherein said shaft portion is coaxially disposed with said screw press head.

3. The juice extractor assembly of claim 1, wherein a ratio of a rotational speed of said cutting blades to a rotational speed of said screw press head is configured to be between 5 and 1000.

4. The juice extractor assembly of claim 1, wherein the rotational speed of the cutter is configured to be 1000rpm-30000rpm.

5. The juice extractor assembly of claim 1, wherein the rotational speed of said screw press head is configured to be 30rpm-3000rpm.

6. The juice extractor assembly of any of claims 1-5, wherein the screw press head extends outwardly from an end remote from the cutting blade to form a flange that axially abuts an end of the cup to limit axial movement of the screw press head.

7. The juice extracting assembly according to any one of claims 1-5, wherein the cutting part divides the interior of the cup body into an upper cutting cavity and a lower pressing cavity, and a gap is provided between a peripheral side of the cutting part and an inner wall of the cup body, the gap forming an annular blanking port for vertically communicating the upper cutting cavity and the lower pressing cavity.

8. The juice extractor assembly of claim 7, further comprising a liquid collection cup, wherein a plurality of exudation holes are formed in the side surface of the lower extrusion cavity on the cup body, the liquid collection cup is sleeved on the outer side of the cup body corresponding to the lower extrusion cavity, a liquid collection cavity is formed between the inner wall of the liquid collection cup and the outer wall of the cup body, and a juice outlet communicated with the liquid collection cavity is further formed in the liquid collection cup.

9. A juice extractor comprising a main machine, wherein a power output assembly is arranged on the main machine, the juice extracting assembly as claimed in any one of claims 1-8 is arranged in the cup body, and the power output assembly is connected with the juice extracting assembly and used for driving the screw press head and the cutting knife to rotate.

10. The juice extractor according to claim 9, wherein said power take-off assembly comprises a first output shaft and a second output shaft, said first output shaft being provided with a second coupler coupled to said first coupler, said second output shaft being connected to said screw press head.

11. The juice extractor according to claim 10, wherein said power take-off assembly is provided with at least one positioning member in said housing cavity for positioning said first output shaft.

12. The juice extractor according to claim 10, wherein said second output shaft is at least partially disposed within said housing cavity, and wherein a maximum outer diameter of a connection of said second output shaft with said screw press head is greater than half an inner diameter of said housing cavity.

13. The juice extractor according to claim 9, wherein said power take-off assembly comprises a motor and a transmission arranged on a shaft of said motor, said shaft of said motor extending through said transmission and being provided with a second coupler coupled to said first coupler, an input of said transmission being connected to said shaft of said motor, an output of said transmission being connected to said screw press head.

14. The juice extractor according to any of the claims 10-13, characterized in that a positioning part is provided between the first coupler and the second coupler.

15. The juice extractor according to any of the claims 10-13, characterized in that the diameter of the coupler positions of the first coupler and the second coupler is 15-100 mm.