Device for extracting polysaccharide from rambutan pulp

Abstract

The utility model relates to the technical field of rambutan polysaccharide extraction, and particularly discloses a device for extracting polysaccharide in rambutan pulp. The device comprises a base plate and a box body arranged on the upper side of the base plate, a feeding port is formed in the upper side of the box body, an arc-shaped partition plate is fixedly connected to the inner side wall of the box body, a material guiding port is formed in the lower side of the arc-shaped partition plate, and a smashing mechanism is installed in the area, located between the feeding port and the arc-shaped partition plate, in the box body; a pair of baffles is arranged between the material guiding opening and the centrifugal barrel, adjusting mechanisms for adjusting the baffles to be opened or closed are installed on the two sides of the box body, the upper sides and the lower sides of the baffles abut against the arc-shaped partition plate and the centrifugal barrel respectively when the baffles are closed, a plurality of through holes are formed in the side wall of the centrifugal barrel, and an extrusion mechanism is installed below the centrifugal barrel. According to the rambutan pulp polysaccharide extraction device, the crushing mechanism, the adjusting mechanism, the centrifugal barrel and the extruding mechanism are arranged, so that multiple functions of crushing, centrifuging, extruding and the like are integrated, and efficient and continuous extraction of rambutan pulp polysaccharide is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of rambutan polysaccharide extraction, in particular to a device for extracting polysaccharides from rambutan pulp. Background Art

[0002] With the advancement of biotechnology and people's increasing attention to natural products, polysaccharides, as a kind of biologically active ingredients, have multiple physiological functions and medicinal values, especially in the fields of medicine, health products, functional foods, etc. Rambutan is a tropical fruit rich in polysaccharides, and the extraction and utilization of its polysaccharides are of great significance for the development of new functional foods and medicines.

[0003] However, traditional rambutan pulp polysaccharide extraction devices usually involve cumbersome operating steps, which not only have low extraction efficiency but also easily cause waste. There is often a lot of polysaccharide liquid left in the rambutan pulp residue after extraction, and the quality of the extracted polysaccharides is also unstable.

[0004] Therefore, developing a new device for extracting polysaccharides from rambutan pulp has become an urgent problem to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a device for extracting polysaccharides from rambutan pulp to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A device for extracting polysaccharides from rambutan pulp comprises a chassis and a box body fixedly connected to the upper side of the chassis, wherein the upper side of the box body is fixedly connected to a feed port, an inner side wall of the box body is fixedly connected to an arc-shaped partition located directly below the feed port, a material guide port is provided on the lower side of the arc-shaped partition, a crushing mechanism is installed in the area between the feed port and the arc-shaped partition inside the box body, a centrifugal cylinder is rotatably installed directly below the material guide port, and the diameter of the centrifugal cylinder is larger than the diameter of the material guide port, a pair of baffles are provided between the material guide port and the centrifugal cylinder, the pair of baffles are respectively slidably connected to the inner sides of strip holes provided in the two side walls of the box body, adjustment mechanisms for adjusting the opening or closing of the pair of baffles are installed on both sides of the box body, and when the pair of baffles are closed, the upper and lower sides of the pair of baffles are respectively in contact with the arc-shaped partition and the centrifugal cylinder, a plurality of through holes are provided on the side walls of the centrifugal cylinder, and an extrusion mechanism is installed below the side walls.

[0008] As a further solution of the utility model, a transmission box is fixedly connected to the rear side of the box body;

[0009] The crushing mechanism includes a first rotating shaft and a second rotating shaft rotatably connected to the front and rear side walls of the box body, a plurality of crushing teeth are fixedly connected to the outer contours of the first rotating shaft and the second rotating shaft, one end of the first rotating shaft and the second rotating shaft both penetrate the box body and extend to the inside of the transmission box, and are respectively fixedly connected to a driving gear and a driven gear meshing with the driving gear, a third driving motor is also fixedly installed inside the transmission box, and the output end of the third driving motor is fixedly connected to the middle part of the driving gear.

[0010] As a further solution of the utility model, the adjustment mechanism includes a first drive motor fixedly mounted on the outer wall of the box body, the output end of the first drive motor is fixedly connected to a threaded rod, the threaded rod is threadedly connected to a moving block, and the top of the moving block is fixedly connected to the outer side of the baffle.

[0011] As a further solution of the utility model, a plurality of support rods are evenly arranged along the circumference of the centrifugal cylinder, and the outer ends of the support rods are rotatably connected to balls through fixed shafts, and the balls are installed on guide rails fixedly connected to the inner wall of the box body;

[0012] An outer wall of the box body is fixedly connected to a second drive motor through a plurality of connecting blocks, an output end of the second drive motor is fixedly connected to a driving sheave, an outer side of the bottom end of the centrifugal cylinder is fixedly connected to a driven sheave, and a belt that runs through the side wall of the box body is transmission-connected between the driven sheave and the driving sheave.

[0013] As a further solution of the utility model, the extrusion mechanism includes a cylinder fixedly mounted on the bottom wall of the box body, the output end of the cylinder is rotatably connected to a clamping piece, and the clamping piece is slidably connected to the inner side of the centrifugal barrel when the output end of the cylinder is lifted upward.

[0014] As a further solution of the utility model, the centrifugal cylinder includes an outer layer and an inner layer fixedly connected to the inner side of the outer layer, the inner layer is made of a magnetic material, the clamping piece includes a rotating disk rotatably connected to the output end of the cylinder, a magnetic ring is fixedly connected to the outer periphery of the rotating disk and can be adsorbed by the inner layer of the centrifugal cylinder to limit its rotation, a pressure block is fixedly connected to the upper side of the rotating disk and the magnetic ring, and a pair of baffles have a pressure groove on their lower side that is compatible with the pressure block when closed.

[0015] As a further solution of the utility model, the pressing block and the pressing groove are both arranged in an arc shape.

[0016] As a further solution of the utility model, a concentrating evaporator is fixedly installed on the upper side of the chassis, and the concentrating evaporator is connected to the inside of the box through a connecting pipe.

[0017] As a further solution of the utility model, a vibration motor is also fixedly connected to the lower side of the arc-shaped partition.

[0018] As a further solution of the utility model, casters are fixedly connected to the four corners of the lower side of the chassis, and the casters are all lockable universal wheels.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. By setting up a crushing mechanism, an adjusting mechanism, a centrifugal cylinder and an extrusion mechanism, multiple functions such as crushing, centrifugation and extrusion are integrated into one, achieving efficient and continuous extraction of rambutan pulp polysaccharides. The synergy between various components significantly improves the extraction efficiency and quality of polysaccharides;

[0021] 2. By adjusting the opening and closing degree of the baffle plate, the flow rate of rambutan pulp entering the centrifuge can be easily adjusted to meet different extraction requirements. The entire extraction process can be automatically controlled, reducing the difficulty of operation and labor costs;

[0022] 3. The centrifugal cylinder in the device can not only cooperate with the extrusion mechanism for extrusion, but also realize high-speed rotation by starting the second drive motor, and use centrifugal force to throw out the residual polysaccharide liquid to avoid waste and pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Figure 1 A schematic diagram of the structure of a device for extracting polysaccharides from rambutan pulp provided by an embodiment of the utility model;

[0025] Figure 2 A schematic diagram of the structure of a crushing mechanism provided in an embodiment of the utility model;

[0026] Figure 3 for Figure 1 A magnified view of the structure at center;

[0027] Figure 4 for Figure 1 A magnified view of the structure at B in the middle;

[0028] Figure 5 A schematic diagram of the structure of a centrifuge cylinder provided in an embodiment of the utility model;

[0029] Figure 6 A schematic structural diagram of an extrusion mechanism provided in an embodiment of the utility model.

[0030] The markings in the attached drawings are: 1, chassis; 2, casters; 3, box; 301, feed port; 302, transmission box; 4, arc partition; 5, vibration motor; 6, baffle; 601, pressure groove; 7, moving block; 8, threaded rod; 9, first drive motor; 10, centrifugal cylinder; 1001, outer layer; 1002, inner layer; 1003, through hole; 11, support rod; 12, ball bearing; 13, guide rail; 14, second drive Motor; 15, connecting block; 16, driving groove wheel; 17, belt; 18, driven groove wheel; 19, protective box; 20, cylinder; 21, clamping piece; 2101, rotating disk; 2102, magnetic ring; 2103, pressing block; 22, connecting pipe; 23, concentrating evaporator; 24, first rotating shaft; 25, second rotating shaft; 26, crushing teeth; 27, third driving motor; 28, driving gear; 29, driven gear. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] See also Figures 1 to 6The embodiment of the utility model provides a device for extracting polysaccharides from rambutan pulp, comprising a chassis 1, a box body 3 is fixedly connected to the upper side of the chassis 1, a feed port 301 is fixedly connected to the upper side of the box body 3, and the rambutan pulp can enter the box body 3 from the feed port 301 to complete the polysaccharide extraction process. An arc-shaped partition 4 located directly below the feed port 301 is fixedly connected to the inner wall of the box body 3, and a guide port is provided on the lower side of the arc-shaped partition 4. A crushing mechanism is installed in the area between the feed port 301 and the arc-shaped partition 4 inside the box body 3. The setting of the arc-shaped partition 4 makes it easy to guide the crushed rambutan pulp out of the guide port. A centrifugal cylinder 10 is rotatably installed directly below the guide port, and the diameter of the centrifugal cylinder 10 is larger than the diameter of the guide port, so that the rambutan pulp can directly fall into the centrifugal cylinder 10. A pair of baffles 6 is provided between the above-mentioned material guide port and the centrifugal cylinder 10, and the pair of baffles 6 are respectively slidably connected to the inner side of the strip holes opened on the two side walls of the box body 3, and the two sides of the box body 3 are both equipped with an adjusting mechanism for adjusting the opening or closing of the pair of baffles 6. Therefore, when the pair of baffles 6 are adjusted to close by the adjusting mechanism, the material guide port is closed, and the crushed rambutan pulp is cut off above the material guide port. In addition, since the opening and closing degree of the pair of baffles 6 can be adjusted, the caliber of the material guide port can also be adjusted, and the flow rate of the rambutan pulp entering the lower centrifugal cylinder 10 can be controlled according to actual needs, which is beneficial to the quality and efficiency of polysaccharide extraction. When the pair of baffles 6 are closed, the upper and lower sides of the pair of baffles 6 are respectively abutted against the arc partition 4 and the centrifugal cylinder 10, and the side walls of the centrifugal cylinder 10 are provided with a plurality of through holes 1003, and an extrusion mechanism is installed below it, and through the setting of the extrusion mechanism, the crushed rambutan pulp inside the centrifugal cylinder 10 can be squeezed out of polysaccharide liquid. In addition, a heater (not shown in the drawings) may be provided on the inner wall of the box body 3 to facilitate fermentation of the extruded polysaccharide liquid.

[0033] See also Figure 1 to Figure 2 The pulverizing mechanism provided by the embodiment of the utility model includes a first rotating shaft 24 and a plurality of second rotating shafts 25 which are rotatably connected to the front and rear side walls of the box body 3. The outer contours of the first rotating shaft 24 and the plurality of second rotating shafts 25 are fixedly connected with a plurality of pulverizing teeth 26. When the first rotating shaft 24 and the plurality of second rotating shafts 25 rotate, the pulverizing teeth 26 can be driven to rotate so as to pulverize the rambutan pulp. One end of the first rotating shaft 24 and the plurality of second rotating shafts 25 penetrates the box body 3 and extends to the inside of the transmission box 302 which is fixedly connected to the rear side of the box body 3, and is respectively fixedly connected with a driving gear 28 and a driven gear 29 meshing with the driving gear 28. A third driving motor 27 is also fixedly installed inside the transmission box 302, and the output end of the third driving motor 27 is fixedly connected to the middle part of the driving gear 28. Therefore, when the third driving motor 27 drives the first rotating shaft 24 to rotate, it can also drive the plurality of second rotating shafts 25 to rotate together at the same time, thereby saving kinetic energy and having a high pulverizing efficiency. Furthermore, in this embodiment, the number of the second rotation shafts 25 is preferably set to two.

[0034] See also Figure 3 The adjustment mechanism provided by the embodiment of the utility model specifically includes a first drive motor 9 fixedly mounted on the outer wall of the box body 3, the output end of the first drive motor 9 is fixedly connected with a threaded rod 8, the threaded rod 8 is threadedly connected with a moving block 7, and the top of the moving block 7 is fixedly connected to the outer side of the baffle 6. Therefore, when the first drive motor 9 is started, by controlling its forward or reverse rotation, the moving block 7 is driven to move horizontally, so as to realize the opening and closing of the above-mentioned baffle 6, and the control accuracy is high.

[0035] See also Figure 1 , Figure 4 and Figure 5 The centrifugal cylinder 10 provided in the embodiment of the utility model is rotatably installed inside the box body 3 through the following scheme. Specifically, the outer periphery of the centrifugal cylinder 10 is fixedly connected with a plurality of support rods 11 along its circumference, and the plurality of support rods 11 are evenly arranged, and the outer ends of the support rods 11 are rotatably connected with balls 12 through fixed shafts, and the balls 12 are installed on guide rails 13 fixedly connected to the inner side wall of the box body 3. In particular, the outer side wall of the box body 3 is fixedly connected with a second drive motor 14 through a plurality of connecting blocks 15, and the output end of the second drive motor 14 is fixedly connected with a driving sheave 16, and the outer side of the bottom end of the centrifugal cylinder 10 is fixedly connected with a driven sheave 18, and a belt 17 arranged through the side wall of the box body 3 is transmission-connected between the driven sheave 18 and the driving sheave 16.

[0036] See also Figure 1 , Figures 4 to 6 The extrusion mechanism provided by the embodiment of the utility model includes a cylinder 20 fixedly mounted on the inner bottom wall of the box body 3, and the output end of the cylinder 20 is rotatably connected with a pressing member 21, and the pressing member 21 is slidably connected to the inner side of the centrifugal cylinder 10 when the output end of the cylinder 20 is lifted upward. The centrifugal cylinder 10 includes an outer layer 1001 and an inner layer 1002 fixedly connected to the inner side of the outer layer 1001, and the inner layer 1002 is made of a magnetic material. The pressing member 21 includes a rotating disk 2101 rotatably connected to the output end of the cylinder 20, and a magnetic ring 2102 is fixedly connected to the outer periphery of the rotating disk 2101, which can be adsorbed with the inner layer 1002 of the centrifugal cylinder 10 to limit its rotation, and a pressing block 2103 is fixedly connected to the upper side of the rotating disk 2101 and the magnetic ring 2102, and a pair of baffles 6 are formed with a pressing groove 601 adapted to the pressing block 2103 on their lower side when they are closed.

[0037] In addition, a concentrating evaporator 23 is fixedly installed on the upper side of the chassis 1, and the concentrating evaporator 23 is connected to the interior of the box body 3 through a connecting pipe 22. A filter screen (not shown in the drawings) can be provided at the inner end of the connecting pipe 22 to prevent fine rambutan pulp residues from being discharged along with the rambutan polysaccharide liquid.

[0038] Therefore, when it is necessary to extract polysaccharide liquid from the crushed rambutan pulp, first start the cylinder 20 to lift the pressing member 21 to the inside of the centrifugal cylinder 10. Specifically, the height of the pressing member 21 can be adjusted according to the amount of one-time backlog, and then control the first drive motor 9 to open the baffle 6, and the crushed rambutan pulp directly falls into the centrifugal cylinder 10, and its lower side is blocked by the pressing member 21. When the amount of one-time extraction is reached, control the first drive motor 9 to close the baffle 6. At this time, the upper and lower sides of the baffle 6 are respectively in contact with the arc partition 4 and the centrifugal cylinder 10, and a pressing groove 601 adapted to the pressing block 2103 is formed on its lower side. Secondly, control the cylinder 20 to continue to drive the pressing member 21 and the rambutan pulp on the upper side of the pressing member 21 to lift, squeeze the rambutan pulp, and the squeezed polysaccharide liquid flows out from the through hole 1003 set on the side wall of the centrifugal cylinder 10 and falls to the bottom of the box body 3. Finally, the polysaccharide liquid at the bottom of the box 3 is output from the connecting pipe 22 to the outside of the box 3, and can enter the concentration evaporator 23 for concentration treatment to extract the polysaccharide.

[0039] In particular, when there is still a lot of sugar liquid remaining in the rambutan pulp residue in the centrifuge cylinder 10, by starting the second drive motor 14, the centrifuge cylinder 10, the pressing piece 21 and the rambutan pulp residue can be rotated at a high speed (the pressing piece 21 and the centrifuge cylinder 10 are adsorbed by magnetic force). Under the action of centrifugal force, the residual polysaccharide liquid is thrown out, avoiding waste and also avoiding contamination of the next extraction process.

[0040] In addition, after the polysaccharide liquid has completely flowed out through the connecting pipe 22, the cylinder 20 is returned to its original position to move the pressing member 21 to the bottom of the centrifuge tube 10. At this time, the rambutan pulp residue falls to the bottom of the box body 3 under the action of gravity. The rambutan pulp residue is cleaned out of the box body 3 by opening a cleaning door (not shown in the drawings) provided on one side wall of the box body 3 to carry out the next extraction work.

[0041] In order to facilitate the falling of rambutan pulp residue, the pressing block 2103 and the pressing groove 601 are both arranged in an arc shape. In addition, the pressing block 2103 is arranged in an arc shape, which can also increase the pressure during squeezing, and the extraction effect is better.

[0042] In particular, in order to protect the cylinder 20 from being damaged by long-term immersion in the polysaccharide liquid, the cylinder 20 is installed inside a protective box 19 arranged at the bottom of the box body 3, and the top of the protective box 19 is also preferably arranged in an arc structure to prevent rambutan pulp residue from accumulating on its upper side.

[0043] In order to facilitate the falling of the crushed rambutan pulp, a vibration motor 5 is fixedly connected to the lower side of the arc-shaped partition 4.

[0044] In order to facilitate the movement of the device, casters 2 are fixedly connected to the four corners of the lower side of the chassis 1, and the casters 2 are all universal wheels with locks.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for extracting polysaccharides from rambutan pulp, comprising a base plate (1) and a box body (3) fixedly connected to the upper side of the base plate (1), characterized in that: The upper side of the box body (3) is fixedly connected to a feed port (301); the inner side wall of the box body (3) is fixedly connected to an arc-shaped partition plate (4) located directly below the feed port (301); a feed guide port is provided on the lower side of the arc-shaped partition plate (4); a crushing mechanism is installed in the area between the feed port (301) and the arc-shaped partition plate (4) inside the box body (3); a centrifugal cylinder (10) is rotatably installed directly below the feed guide port, and the diameter of the centrifugal cylinder (10) is larger than the diameter of the feed guide port; the feed guide port A pair of baffles (6) are arranged between the centrifugal cylinder (10), and the pair of baffles (6) are respectively slidably connected to the inner sides of the strip holes opened on the two side walls of the box body (3). Adjustment mechanisms for adjusting the opening or closing of the pair of baffles (6) are installed on both sides of the box body (3). When the pair of baffles (6) are closed, the upper and lower sides of the pair of baffles (6) are respectively in contact with the arc-shaped partition (4) and the centrifugal cylinder (10). The side wall of the centrifugal cylinder (10) is opened with a plurality of through holes (1003), and a squeezing mechanism is installed below it.

2. The device for extracting polysaccharides from rambutan pulp according to claim 1, characterized in that: A transmission box (302) is fixedly connected to the rear side of the box body (3); The pulverizing mechanism comprises a first rotating shaft (24) and a second rotating shaft (25) which are rotatably connected to the front and rear side walls of the housing (3); a plurality of pulverizing teeth (26) are fixedly connected to the outer contours of the first rotating shaft (24) and the second rotating shaft (25); one end of the first rotating shaft (24) and the second rotating shaft (25) penetrate the housing (3) and extend to the inside of a transmission box (302), and are respectively fixedly connected to a driving gear (28) and a driven gear (29) meshing with the driving gear (28); a third driving motor (27) is also fixedly installed inside the transmission box (302); the output end of the third driving motor (27) is fixedly connected to the middle of the driving gear (28).

3. The device for extracting polysaccharides from rambutan pulp according to claim 1, characterized in that: The adjustment mechanism comprises a first drive motor (9) fixedly mounted on the outer wall of the box body (3); the output end of the first drive motor (9) is fixedly connected to a threaded rod (8); the threaded rod (8) is threadedly connected to a moving block (7); and the top end of the moving block (7) is fixedly connected to the outer side of the baffle (6).

4. The device for extracting polysaccharides from rambutan pulp according to claim 1, characterized in that: The outer periphery of the centrifugal cylinder (10) is evenly provided with a plurality of support rods (11) along its circumference, and the outer ends of the support rods (11) are rotatably connected to balls (12) via fixed shafts, and the balls (12) are mounted on guide rails (13) fixedly connected to the inner side wall of the box body (3); An outer side wall of the box body (3) is fixedly connected to a second drive motor (14) via a plurality of connection blocks (15); an output end of the second drive motor (14) is fixedly connected to a driving groove wheel (16); a driven groove wheel (18) is fixedly connected to the outer side of the bottom end of the centrifugal cylinder (10); a belt (17) that runs through the side wall of the box body (3) is transmission-connected between the driven groove wheel (18) and the driving groove wheel (16).

5. The device for extracting polysaccharides from rambutan pulp according to claim 4, characterized in that: The extrusion mechanism comprises a cylinder (20) fixedly mounted on the inner bottom wall of the box body (3); the output end of the cylinder (20) is rotatably connected to a pressing piece (21); and the pressing piece (21) is slidably connected to the inner side of the centrifugal cylinder (10) when the output end of the cylinder (20) is lifted upward.

6. The device for extracting polysaccharides from rambutan pulp according to claim 5, characterized in that: The centrifugal cylinder (10) comprises an outer layer (1001) and an inner layer (1002) fixedly connected to the inner side of the outer layer (1001), wherein the inner layer (1002) is made of a magnetic material, and the pressing member (21) comprises a rotating disk (2101) rotatably connected to the output end of the cylinder (20), wherein the outer periphery of the rotating disk (2101) is fixedly connected to a magnetic ring (2102) capable of adsorbing the inner layer (1002) of the centrifugal cylinder (10) to restrict its rotation, and a pressing block (2103) is fixedly connected to the upper side of the rotating disk (2101) and the magnetic ring (2102), and a pair of baffles (6) are formed with a pressing groove (601) on their lower side when closed to match the pressing block (2103).

7. The device for extracting polysaccharides from rambutan pulp according to claim 6, characterized in that: The pressing block (2103) and the pressing groove (601) are both configured to be arc-shaped.

8. The device for extracting polysaccharides from rambutan pulp according to claim 1, characterized in that: A concentrating evaporator (23) is fixedly mounted on the upper side of the chassis (1), and the concentrating evaporator (23) is connected to the interior of the box (3) through a connecting pipe (22).

9. The device for extracting polysaccharides from rambutan pulp according to claim 1, characterized in that: A vibration motor (5) is also fixedly connected to the lower side of the arc-shaped partition plate (4).

10. The device for extracting polysaccharides from rambutan pulp according to claim 1, characterized in that: Casters (2) are fixedly connected at the four corners of the lower side of the chassis (1), and the casters (2) are all universal wheels with locks.

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