CN112369895A

CN112369895A - Shaddock peeler

Info

Publication number: CN112369895A
Application number: CN202011385813.9A
Authority: CN
Inventors: 谢世坤; 郑慧玲; 胡发焕; 易荣喜
Original assignee: Jinggangshan University
Current assignee: Jinggangshan University
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-02-19
Anticipated expiration: 2040-11-30
Also published as: CN112369895B

Abstract

The invention relates to the technical field of peeling machines, and discloses a grapefruit peeling machine, which comprises: the automatic positioning device comprises a frame, a first telescopic mechanism, up-and-down translation mechanism, first electric telescopic handle and cutter, be connected with the revolving stage in the frame, be equipped with vertical ascending pilot pin on the revolving stage, first telescopic mechanism is connected with the pilot pin, the through-hole has on the revolving stage, first telescopic mechanism can make the pilot pin stretch out or retract in the revolving stage along the through-hole, two sets of axial settings along the revolving stage of up-and-down translation mechanism, the both sides of revolving stage are located to the symmetry, the lower extreme of up-and-down translation mechanism is connected with the lower terminal surface of frame respectively, up-and-down translation mechanism can follow vertical direction up-and-down reciprocating motion, the axial setting of first electric telescopic handle perpendicular to revolving stage, the stiff end is connected with up-and-down translation mechanism, can be along with up. The grapefruit peeler disclosed by the invention can remove the peel on the upper top surface and the lower top surface of a grapefruit when removing the peel of a grapefruit body.

Description

Shaddock peeler

Technical Field

The invention relates to the technical field of peeling machines, in particular to a grapefruit peeling machine.

Background

The pomelo is a popular fruit, and is processed into fruit juice, fruit wine, jam cans and the like due to the fact that the pulp of the pomelo is rich in vitamins and mineral substances.

The pomelo peel is removed before processing, the pomelo peel is mostly fixed up and down by a cutting tool in the rotation process of the pomelo, the pomelo peel is cut off from top to bottom by the cutting tool, a positioning sensor is matched on the cutting tool, the pomelo can be positioned, and the cutting tool is always in contact with the pomelo peel in the cutting process.

Disclosure of Invention

The invention provides a grapefruit peeler which can remove peels on the upper top surface and the lower top surface of a grapefruit when removing peels of a grapefruit body.

The invention provides a grapefruit peeler, comprising:

the device comprises a rack, wherein a rotating table is connected to the rack and is provided with a positioning needle vertically upwards;

the first telescopic mechanism is connected with the positioning needle, a through hole is formed in the rotating platform, and the positioning needle can extend out of or retract into the rotating platform along the through hole;

the two groups of up-down translation mechanisms are arranged along the axial direction of the rotating table and symmetrically arranged on two sides of the rotating table, the lower ends of the up-down translation mechanisms are respectively connected with the lower end surface of the rack, and the up-down translation mechanisms can reciprocate up and down along the vertical direction;

the fixed end of the first electric telescopic rod is connected with the up-down translation mechanism and can reciprocate up and down along the vertical direction along with the up-down translation mechanism;

the cutter is fixedly connected with the telescopic end of the first electric telescopic rod;

the pressing plate is connected with the upper end of the rack through a second telescopic mechanism and can move up and down along the vertical direction.

Optionally, the first telescoping mechanism includes:

the first motor is fixed at the bottom of the rack, and an output shaft is vertically upward;

the rotating pipe is arranged along the axial direction of the rotating table, the lower end of the rotating pipe is coaxially connected with an output shaft of the first motor, and the upper end of the rotating pipe is fixedly connected with the lower surface of the rotating table;

the first screw is arranged in the rotating pipe along the axial direction of the rotating table, and the lower end of the first screw is fixedly connected with an output shaft of the first motor;

the first moving plate is in threaded connection with the periphery of the first screw rod, and the periphery of the first moving plate is in sliding connection with the inner wall of the rotating pipe along the axial direction of the first screw rod;

and the connecting rods are arranged in the rotating pipe, the lower ends of the connecting rods are fixedly connected with the first moving plate, and the upper ends of the connecting rods are fixedly connected with the lower end of the positioning needle.

Optionally, the up-down translation mechanism includes:

the second motor is fixedly connected with the lower end of the rack, and an output shaft is vertically upward;

the lower end of the second screw is coaxially connected with an output shaft of a second motor;

and the second moving plate is in threaded connection with the periphery of the second screw rod, the periphery of the second moving plate is in sliding connection with the side wall of the rack along the vertical direction, and the side wall, close to the rotating table, of the second moving plate is fixedly connected with the fixed end of the first electric telescopic rod.

Optionally, the lower end of the pressing plate is connected with a first pressure sensor and a distance sensor, and the first pressure sensor and the distance sensor are respectively in signal connection with the microprocessor;

after the grapefruit peeler is electrified, the microprocessor controls the second telescoping mechanism to extend through the second telescoping mechanism controller, the pressing plate moves downwards, the pressure sensor starts to contact the top of the grapefruit along with the downward movement of the pressing plate and transmits the detected pressure value to the microprocessor in real time, the microprocessor compares the received pressure value with a first pressure value preset in the microprocessor, when the two values are equal, the microprocessor controls the second telescoping mechanism to stop extending through the second telescoping mechanism controller, the first motor controller controls the first motor to rotate, the rotating table rotates, the positioning needle ascends and extends out of the rotating table to be inserted into the bottom of the grapefruit, the microprocessor receives the distance value from the pressing plate to the rotating table detected by the distance sensor, and controls the number of forward rotation or reverse rotation of the second motor through the second motor controller, so that the ascending or descending distance of the second moving plate is equal to the distance value from the pressing plate to the rotating table, the cutter moves upwards to the highest point or downwards to the lowest point along with the rotation of the rotating table to complete peeling of the pomelo, meanwhile, the microprocessor controls a first electric telescopic rod to extend for a fixed value through the first electric telescopic rod controller, the pomelo topples along with the pomelo, the microprocessor controls a second telescopic mechanism to extend through the second telescopic mechanism controller to enable the pressing plate to be always in contact with the outer peripheral wall of the pomelo in the process, the microprocessor controls the second telescopic mechanism to stop extending through the second telescopic mechanism controller until the pressure value detected by the first pressure sensor received by the microprocessor is equal to a preset third pressure value, receives the distance from the pressing plate to the rotating table at the moment detected by the distance sensor, and controls the number of rotating turns of the second motor through the second motor controller to enable the ascending or descending distance of the second moving plate to be equal to the distance from the pressing plate to the rotating table, the extension distance of the first electric telescopic rod is controlled to enable the cutter to be inserted into the shaddock peel through controlling the first electric telescopic rod, and the shaddock top peel and the shaddock bottom peel are removed.

Optionally, the grapefruit peeler further comprises two second electric telescopic rods fixedly connected to the rack, the second electric telescopic rods are symmetrically arranged on two sides of the rotating table and are perpendicular to the axial direction of the rotating table, the telescopic end is fixedly connected with a limiting plate, a second pressure sensor is arranged on the limiting plate, and the second pressure sensor is in signal connection with the microprocessor;

in-process is emptyd at the shaddock, microprocessor controls the extension of second electric telescopic handle through second electric telescopic handle controller respectively until the limiting plate butt to the shaddock, then second pressure sensor transmits real-time detection's pressure value for microprocessor, microprocessor compares this pressure value and predetermined second pressure value when being equal, stop the extension through second electric telescopic handle controller control second electric telescopic handle, after the cutter accomplishes the cutting, microprocessor controls second electric telescopic handle through second electric telescopic handle controller and resets.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the first telescopic mechanism is arranged on the positioning needle, after the peel of the grapefruit body is cut, the positioning needle is retracted below the table top of the rotating table through shortening of the first telescopic mechanism, the grapefruit is separated from the fixing of the positioning needle, the grapefruit is poured onto the rotating table through extension of the first electric telescopic rod, the pressing plate is tightly pressed against the upper surface of the grapefruit through extension of the second telescopic mechanism in the process, the pouring direction of the grapefruit can be limited, and the displacement can be avoided when the grapefruit peel at the top and the bottom of the grapefruit is cut, the peel is cut along with the up-and-down movement of the first translation mechanism when the front end of the cutter is inserted into the peel of the upper and lower top surfaces of the grapefruit, the function of removing the peel of the upper and lower top surfaces of the grapefruit when the peel of the grapefruit body is removed is realized, and the labor force is greatly saved.

Drawings

Fig. 1 is a schematic structural view of a grapefruit peeler according to an embodiment of the present invention;

fig. 2 is an enlarged view of a portion of the structure at G in fig. 1.

Description of reference numerals:

1-a rack, 2-a rotating table, 3-a positioning needle, 4-a first electric telescopic rod, 5-a cutter, 6-a first motor, 7-a rotating pipe, 8-a first screw rod, 9-a first moving plate, 10-a connecting rod, 11-a pressing plate, 12-a second motor, 13-a second screw rod, 14-a second moving plate, 15-a second electric telescopic rod, 16-a limiting plate, 17-a second pressure sensor, 18-a first pressure sensor, 19-a distance sensor, 20-a second telescopic mechanism and 21-a through hole.

Detailed Description

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-2, an embodiment of the present invention provides a grapefruit peeler, including: the automatic cutting machine comprises a frame 1, a first telescopic mechanism, an up-down translation mechanism, a first electric telescopic rod 4, a cutter 5 and a pressing plate 11, wherein a rotating table 2 is connected to the frame 1, a positioning needle 3 which faces upwards vertically is arranged on the rotating table 2, the first telescopic mechanism is connected with the positioning needle 3, a through hole 10 is formed in the rotating table 2, the positioning needle 3 can extend out of or retract into the rotating table 2 along the through hole 10 by the first telescopic mechanism, two groups of up-down translation mechanisms are arranged along the axial direction of the rotating table 2 and symmetrically arranged at two sides of the rotating table 2, the lower ends of the up-down translation mechanisms are respectively connected with the lower end face of the frame 1, the up-down translation mechanisms can reciprocate up and down along the vertical direction, the first electric telescopic rod 4 is arranged perpendicular to the axial direction of the rotating table 2, a fixed end is connected with the up-down translation mechanisms and can reciprocate, the pressing plate 11 is connected with the upper end of the frame 1 through a second telescopic mechanism 20 and can move up and down along the vertical direction.

The positioning sensor equipped with the cutter can ensure that the cutter is always contacted with the pomelo peel, and the cutting depth is set in advance, which is not repeated in the invention, in the embodiment, the control of the first telescoping mechanism, the up-down translation mechanism, the first electric telescopic rod 4 and the second telescoping mechanism 20 is not limited to manual or automatic control, the invention can ensure that the pomelo peel is cut completely by arranging the first telescoping mechanism on the positioning needle, the positioning needle is retracted into the table top of the rotating table through shortening of the first telescoping mechanism, the pomelo is separated from the fixing of the positioning needle, the pomelo is inclined on the rotating table through the extension of the first electric telescopic rod, the pressure plate is tightly propped against the upper surface of the pomelo through the extension of the second telescoping mechanism in the process, the inclination direction of the pomelo can be limited, and the pomelo can not be displaced when the pomelo peel at the top and the bottom of the pomelo is cut, along with reciprocating of first translation mechanism make the cutter front end insert in the peel of the upper and lower top surface of shaddock along with reciprocating of first translation mechanism and cut the peel, realized removing the function of the peel of the upper and lower top surface of shaddock when getting rid of shaddock body peel, practiced thrift the labour greatly.

Optionally, the first telescoping mechanism includes: first motor 6, the rotating tube 7, first screw rod 8, first movable plate 9 and many connecting rods 10, first motor 6 is fixed in the bottom of frame 1, the output shaft is vertical up, rotating tube 7 sets up along the axial of revolving stage 2, the lower extreme and the output shaft coaxial coupling of first motor 6, the upper end links firmly with the lower surface of revolving stage 2, first screw rod 8 is located in rotating tube 7 along the axial of revolving stage 2, the lower extreme links firmly with the output shaft of

first motor

6, 9 spiro union in the periphery of first screw rod 8 of first movable plate, the axial sliding connection of first screw rod 8 is followed to the inner wall of periphery and rotating tube 7, many connecting rods 10 are located in rotating tube 7, the lower extreme links firmly with first movable plate 9, the upper end links firmly with the lower extreme of pilot pin 3.

Optionally, the up-down translation mechanism includes: the second motor 12 is fixedly connected with the lower end of the rack 1, an output shaft is vertically upward, the lower end of the second screw 13 is coaxially connected with the output shaft of the second motor 12, the second moving plate 14 is screwed on the periphery of the second screw 13, the periphery of the second moving plate is connected with the side wall of the rack 1 in a sliding mode in the vertical direction, and the side wall, close to the rotating table 2, of the second moving plate 14 is fixedly connected with the fixed end of the first electric telescopic rod 4.

In order to realize the automation of peeling the grapefruit, the lower end of the pressing plate 11 is connected with a first pressure sensor 18 and a distance sensor 19, the first pressure sensor 18, the distance sensor 19, the first motor 6, the second motor 12 and the second telescopic mechanism 20 are respectively in signal connection with a microprocessor, the microprocessor is also in signal connection with an automatic peeling switch, the automatic peeling switch is turned on, the microprocessor controls the second telescopic mechanism 20 to extend, the first pressure sensor 18 transmits a detected first pressure value to the microprocessor in real time, the microprocessor compares the received first pressure value with a first pressure set value preset in the microprocessor, when the two values are equal, the microprocessor controls the second telescopic mechanism 20 to stop extending, controls the first motor 6 to rotate until the positioning pin 3 rises to the highest point, and receives the distance value from the pressing plate 11 to the rotating platform 2, which is detected by the distance sensor 19, and controlling the second motor 12 to rotate forward or backward, so that the distance of the second moving plate 14 rising or falling is equal to the distance value from the pressing plate 11 to the rotating platform 2, along with the rotation of the rotating platform 2, the cutter 5 moves up to the highest point or moves down to the lowest point to peel the pomelo, then the microprocessor controls the first motor 6 to rotate reversely to move the first moving plate 9 down, the positioning needle 3 retracts into the through hole 21, when the first moving plate 9 moves down to the lowest point, the microprocessor controls a first electric telescopic rod 4 to extend for a fixed value, the pomelo falls down, in the process, the microprocessor controls the second telescopic mechanism 20 to extend to enable the pressing plate 11 to be always contacted with the peripheral wall of the pomelo, and until the pressure value detected by the first pressure sensor 18 and received by the microprocessor is equal to a preset third pressure setting value, the microprocessor controls the second telescopic mechanism 20 to stop extending, and the distance between the pressing plate 11 and the rotating platform 2 at the moment detected by the distance sensor 19 is received, the second motor is controlled to rotate, so that the ascending or descending distance of the second moving plate 14 is equal to the distance between the pressing plate 11 and the rotating platform 2, and the cutter is inserted into the shaddock peel by controlling the extending distance of the first electric telescopic rod 4, so that the removal of the top peel and the bottom peel of the shaddock is completed.

The use method and the working principle are as follows: placing a pomelo on a rotating platform 2, opening an automatic peeling switch, controlling the extension of a second telescoping mechanism 20 by a microprocessor through a second telescoping mechanism controller, moving a pressing plate 11 downwards, leading a first pressure sensor 18 to start to contact the top of the pomelo along with the downward movement of the pressing plate 11, transmitting a detected pressure value to the microprocessor in real time, comparing the received pressure value with a first pressure value preset in the microprocessor, when the two values are equal, leading the pressing plate 11 to tightly abut against the top of the pomelo when the pressure value is reached, controlling the second telescoping mechanism 20 to stop extending by the microprocessor through the second telescoping mechanism controller, controlling a first motor 6 to rotate through a first motor controller to drive the rotating platform 2 to rotate, simultaneously driving a first screw rod 8 to rotate synchronously by the first motor 6, leading a first moving plate 9 to move upwards to drive a plurality of connecting rods 10 to move upwards, driving a positioning needle 3 to ascend by the connecting rods 10 to extend out of the rotating platform 2 to be, when the first movable plate 9 rises to the uppermost end of the first screw 8, the lower end of the first movable plate 9 just breaks away from the thread on the first screw 8, the first screw 8 idles at the polished rod of the first screw 8, the first movable plate 9 does not move upwards any more (when the first motor 6 rotates reversely, the first movable plate 9 moves downwards and enters the thread of the first screw 8 again, the first movable plate 9 moves downwards to the lowermost end of the thread of the first screw 8, the broken thread is at the polished rod, at the moment, the first screw 8 also belongs to an idle state), at the moment, the positioning needle 3 rises to the uppermost position to perform up-down double fixation on the pomelo, so as to ensure that the pomelo cannot be thrown out from the rotating table 2 in the peeling process, meanwhile, the microprocessor controls the first electric rod 4 to extend until the cutter 5 is inserted into the pomelo peel for a certain distance through the first electric telescopic rod controller, controls the extending distance of the first electric rod 4 through the positioning, the depth of the knife 5 inserted into the pomelo peel is preset in advance, when the first moving plate 9 moves to the top, namely the positioning needle 3 completely exposes out of the table surface of the rotating table 2, the process is set by presetting the number of rotation turns of the first motor 6 in the microprocessor, and when the first moving plate 9 just moves from the lowest position to the highest position of the threads on the first screw 8 after the first motor 6 rotates for a fixed number of turns, the microprocessor receives the distance value from the pressing plate 11 to the rotating table 2 detected by the distance sensor 19, and controls the number of forward rotation or reverse rotation turns of the second motor 12 through the second motor controller, so that the ascending distance or descending distance of the second moving plate 14 is equal to the distance value from the pressing plate 11 to the rotating table 2, a common peeling machine can move the knife up or down to the longest distance, which wastes electric power, and the moving stroke of the knife cannot be changed according to the heights of different pomelo, the invention can control the movement formation of the cutter 5 according to different heights of the pomelo, saves resources, if the second moving plate 14 moves upwards, the cutter 5 is driven to move upwards, in the process, the first motor 6 continuously rotates but the first moving plate 9 does not move upwards any more, the cutter 5 moves upwards to the highest point along with the rotation of the rotating platform 2 to complete the peeling of the pomelo, when the cutter 5 moves upwards to the highest point, the microprocessor controls the second motor 12 to stop rotating through the second motor controller, the cutter 5 does not move any more, then the microprocessor controls the first motor 6 to rotate reversely through the first motor controller, the microprocessor drives the first screw 8 to rotate reversely to make the first moving plate 9 move downwards, the positioning needle 3 retracts into the through hole 21 of the rotating platform 2, when the first moving plate 9 moves downwards to the lowest position, the microprocessor controls the first electric telescopic rod 4 to extend for a fixed value through the first electric telescopic rod controller, the fixed value is larger than the diameter of a common pomelo, the upper part of the pomelo is pushed by the first electric telescopic rod 4, the pomelo is toppled along with the pomelo, in the process, the microprocessor controls the second telescopic mechanism 20 to extend through the second telescopic mechanism controller to enable the pressing plate 11 to be always contacted with the peripheral wall of the pomelo, so that the pomelo can be limited, when the pressure value detected by the first pressure sensor 18 and received by the microprocessor is equal to a preset third pressure value, the microprocessor controls the second telescopic mechanism 20 to stop extending through the second telescopic mechanism controller, at the moment, the pressing plate 11 tightly supports against the pomelo body, and receives the distance from the pressing plate 11 to the rotating platform 2 at the moment, which is detected by the distance sensor 19, the microprocessor controls the number of rotating turns of the second motor 12 through controlling the second motor controller to enable the ascending or descending distance of the second moving plate 14 to, the extension distance of controlling the first electric telescopic rod 4 makes the cutter insert the shaddock peel through controlling the first electric telescopic rod, and the removal of the shaddock top peel and the bottom peel is completed along with the reverse rotation of the rotating table 2.

Optionally, the grapefruit peeler further comprises two second electric telescopic rods 15 fixedly connected to the frame 1, the second electric telescopic rods 15 are symmetrically arranged at two sides of the rotating table 2 and are perpendicular to the axial direction of the rotating table 2, the telescopic end is fixedly connected with a limiting plate 16, a second pressure sensor 17 is arranged on the limiting plate 16, the second pressure sensor 17 is in signal connection with the microprocessor, in the process of pouring the grapefruit, the microprocessor controls the second electric telescopic rod 15 to extend through the second electric telescopic rod controller respectively until the limiting plate 16 abuts against the grapefruit, the second pressure sensor 17 transmits the real-time detected pressure value to the microprocessor, and the microprocessor compares the pressure value with a preset second pressure value, the microprocessor controls the second electric telescopic rod 15 to stop extending and stop for a fixed time (for example, 3s) through the second electric telescopic rod controller, and then controls the second electric telescopic rod 15 to reset.

The use method and the working principle are as follows: in order to further ensure that the grapefruits cannot fall off from the rotating table 2 in the process of being pushed down, the second electric telescopic rod 15 limits the grapefruits, in the process of toppling the grapefruits, the second electric telescopic rod 15 extends to the limit plate 16 and abuts against the grapefruits to limit the grapefruits, the microprocessor controls the second electric telescopic rod 15 to stop extending through the second electric telescopic rod controller and controls the second electric telescopic rod 15 to reset after stopping for a fixed time (for example, 3s), and in the process, the grapefruits are toppled over completely.

The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims

1. A grapefruit peeler, comprising: frame (1), be connected with revolving stage (2) on frame (1), be equipped with vertical ascending pilot pin (3) on revolving stage (2), its characterized in that still includes:

the first telescopic mechanism is connected with the positioning needle (3), a through hole (21) is formed in the rotating platform (2), and the positioning needle (3) can extend out of or retract into the rotating platform (2) along the through hole (21);

the two groups of up-down translation mechanisms are arranged along the axial direction of the rotating table (2) and symmetrically arranged on two sides of the rotating table (2), the lower ends of the up-down translation mechanisms are respectively connected with the lower end surface of the rack (1), and the up-down translation mechanisms can reciprocate up and down along the vertical direction;

the first electric telescopic rod (4) is perpendicular to the axial direction of the rotating table (2), and a fixed end of the first electric telescopic rod is connected with the up-down translation mechanism and can reciprocate up and down along the vertical direction along with the up-down translation mechanism;

the cutter (5) is fixedly connected with the telescopic end of the first electric telescopic rod (4);

and the pressing plate (11) is connected with the upper end of the rack (1) through a second telescopic mechanism (20) and can move up and down along the vertical direction.

2. The grapefruit peeler of claim 1, wherein the first telescoping mechanism comprises:

the first motor (6) is fixed at the bottom of the rack (1), and an output shaft is vertically upward;

the rotating pipe (7) is arranged along the axial direction of the rotating table (2), the lower end of the rotating pipe is coaxially connected with the output shaft of the first motor (6), and the upper end of the rotating pipe is fixedly connected with the lower surface of the rotating table (2);

the first screw (8) is arranged in the rotating pipe (7) along the axial direction of the rotating table (2), and the lower end of the first screw is fixedly connected with an output shaft of the first motor (6);

the first moving plate (9) is screwed on the periphery of the first screw (8), and the periphery of the first moving plate is connected with the inner wall of the rotating pipe (7) in a sliding manner along the axial direction of the first screw (8);

and the connecting rods (10) are arranged in the rotating pipe (7), the lower end of the connecting rods is fixedly connected with the first moving plate (9), and the upper end of the connecting rods is fixedly connected with the lower end of the positioning needle (3).

3. The grapefruit peeler of claim 2, wherein the up-down translation mechanism comprises:

the second motor (12) is fixedly connected with the lower end of the rack (1), and an output shaft is vertically upward;

the lower end of the second screw (13) is coaxially connected with an output shaft of the second motor (12);

the second movable plate (14) is in threaded connection with the periphery of the second screw (13), the periphery of the second movable plate is in sliding connection with the side wall of the rack (1) in the vertical direction, and the second movable plate (14) is close to the side wall of the rotating table (2) and the fixed end of the first electric telescopic rod (4) are fixedly connected.

4. The grapefruit peeler according to claim 3, wherein a first pressure sensor (18) and a distance sensor (19) are connected to a lower end of the pressure plate (11), the first pressure sensor (18), the distance sensor (19), the first motor (6), the second motor (12) and the second telescoping mechanism (20) are respectively in signal connection with a microprocessor, and the microprocessor is further in signal connection with an automatic peeling switch;

the automatic peeling switch is turned on, the microprocessor controls the second telescopic mechanism (20) to extend, the first pressure sensor (18) transmits a detected first pressure value to the microprocessor in real time, the microprocessor compares the received first pressure value with a first pressure set value preset in the microprocessor, when the detected first pressure value and the first pressure set value are equal, the microprocessor controls the second telescopic mechanism (20) to stop extending, the first motor (6) is controlled to rotate until the positioning needle (3) rises to the highest point, the microprocessor receives a distance value between the pressing plate (11) and the rotating platform (2) detected by the distance sensor (19), and controls the second motor (12) to rotate forwards or backwards, so that the ascending or descending distance of the second moving plate (14) is equal to the distance value between the pressing plate (11) and the rotating platform (2), and the rotating platform (2) rotates, the cutter (5) moves upwards to the highest point or downwards to the lowest point to peel the pomelo, then the microprocessor controls the first motor (6) to rotate reversely to enable the first moving plate (9) to move downwards, the positioning needle (3) retracts into the through hole (21), when the first moving plate (9) moves downwards to the lowest position, the microprocessor controls the first electric telescopic rod (4) to extend for a fixed value, the pomelo topples over, in the process, the microprocessor controls the second telescopic mechanism (20) to extend to enable the pressing plate (11) to be in contact with the outer circumferential wall of the pomelo all the time, until the microprocessor receives a pressure value detected by the first pressure sensor (18) and equals to a preset third pressure set value, the microprocessor controls the second telescopic mechanism (20) to stop extending, and receives the distance from the pressing plate (11) to the rotating table (2) at the moment detected by the distance sensor (19), the second motor is controlled to rotate so that the ascending or descending distance of the second moving plate (14) is equal to the distance from the pressing plate (11) to the rotating table (2), the cutter is inserted into the shaddock peel by controlling the extending distance of the first electric telescopic rod (4), and the shaddock top peel and the shaddock bottom peel are removed.

5. The grapefruit peeler as claimed in claim 4, further comprising two second electric telescopic rods (15) fixedly connected to the frame (1), wherein the second electric telescopic rods (15) are symmetrically arranged on two sides of the rotating table (2) and are perpendicular to the axial direction of the rotating table (2), a limiting plate (16) is fixedly connected to a telescopic end, a second pressure sensor (17) is arranged on the limiting plate (16), and the second pressure sensor (17) is in signal connection with a microprocessor;

in-process is emptyd at the shaddock, microprocessor controls second electric telescopic handle (15) extension through second electric telescopic rod controller respectively and until limiting plate (16) butt to the shaddock, then second pressure sensor (17) transmit real-time detection's pressure value for microprocessor, microprocessor compares this pressure value and predetermined second pressure value when being equal, controls second electric telescopic handle (15) and resets after stopping fixed length of time through second electric telescopic rod controller control second electric telescopic handle (15) and stop the extension.