CN216453215U - Rotary cutting type automatic Chinese chestnut cutting equipment - Google Patents

Abstract

The utility model relates to the technical field of forest fruit processing, particularly relates to a chestnut cutting processing technology, and discloses rotary cutting type automatic chestnut cutting equipment. The automatic Chinese chestnut cutting equipment comprises a frame type carrier, a power input device arranged on one side of the frame, a moving and parking device arranged at the bottom of the frame, a feeding device arranged at the top of the frame, a turning and conveying device arranged below the feeding device, a cutting device arranged at the front part of the conveying device, and a collecting device arranged at the front part of the cutting device and connected with a box body. The feeding device can feed the chestnuts in batches in rows from the square hopper above, and the chestnuts slide to the overturning and conveying device along with the dustpan-shaped slide way; the turning and conveying device can turn and arrange the Chinese chestnuts into a plurality of rows to enter the corresponding cutting devices; the cutting device can profile the convex surface of the chestnut and perform equal-depth cutting treatment; and (4) uniformly collecting the processed groups of Chinese chestnuts in a collecting device. The utility model replaces manual work of cutting the chestnut, greatly saves manpower and reduces work risk.

Description

Rotary cutting type automatic Chinese chestnut cutting equipment

Technical Field

The utility model relates to the technical field of forest fruit processing machinery, in particular to a chestnut cutting processing technology, and specifically relates to rotary cutting type automatic chestnut cutting equipment.

Background

The Chinese chestnut is originally produced in China, is one of the earliest famous nuts eaten in China, and has the annual output at the top of the world. Chinese chestnut has good quality and rich nutrition in China, the meat quality of fried chestnuts is fine and sweet and palatable, the fried chestnuts are named as sugar-fried chestnuts, the sugar-fried chestnuts are famous traditional snacks with local flavor in Jingjin, and the sugar-fried chestnuts also have long-term traditional delicacy and are deeply loved by people. Before the chestnut is fried, a cut is usually required to be formed on the shell of the chestnut so as to be tasty during frying, and the cut of the shell of the chestnut is cracked along with the rise of temperature during frying so as to be convenient for people to peel off and eat.

At present, an opening mode on a Chinese chestnut shell is mainly to cut an opening for a manual handheld cutter, the raw Chinese chestnut shell is hard, the manual incision treatment on the Chinese chestnut shell is high in difficulty and large in danger coefficient, the production efficiency is low during large-batch processing, and safety accidents are easily caused.

In the prior art, a chestnut cutting machine is available, with application number 201910060602.9, application date 20190122. The specific implementation mode of the chestnut cutting machine is as follows: the Chinese chestnut enters an independent material groove by a conveying mechanism and moves to an opening device along with the material groove, the opening device mainly comprises a connecting rod mechanism, a transmission handle is pulled by manpower to operate the mechanism to drive a cutter to carry out vertical extrusion type incision on the Chinese chestnut in a processing groove one by one, and the opening operation is completed by observing the opening depth through naked eyes.

The chestnut cutting machine needs to be processed by means of manual operation equipment and visual observation, and the mode is low in production efficiency and difficult to widely popularize and use; and through on the spot investigation and study learn, when the manual work is opened the incision to the chinese chestnut, can be selective open the incision to the convex surface department of chinese chestnut to this reaches the purpose of guaranteeing the looks and being convenient for the chinese chestnut system of frying to split, and prior art's chinese chestnut cutting machine can't distinguish in the silo which face of chinese chestnut carries out the incision upwards, and extrusion formula incision mode can lead to the chinese chestnut damage, can't guarantee the looks of processing back chinese chestnut.

In conclusion, the prior art has obvious defects in practical application. Therefore, there is a need to develop an apparatus which can automatically perform a cutting process on a large number of chestnuts and can ensure the appearance of the chestnuts after the cutting process.

Disclosure of Invention

The utility model aims to provide rotary cutting type automatic Chinese chestnut cutting equipment aiming at the technical problems in the prior art, which can be suitable for high-efficiency cutting treatment of large-batch Chinese chestnuts and can ensure the high quality of the processed Chinese chestnuts.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a rotary cutting type automatic chestnut cutting device comprises a frame type carrier, a power input device arranged on one side of the frame, a moving and parking device arranged at the bottom of the frame, a feeding device arranged at the top of the frame, a turning and conveying device arranged below the feeding device, a cutting device arranged at the front part of the conveying device, and a collecting device arranged at the front part of the cutting device and connected with a box body.

The automatic incision processing process of the equipment starts from the feeding device, and the automatic incision processing process is finished after the automatic incision processing process enters the collecting device through the overturning and conveying device and the incision device.

Further, the feeding device main body is composed of a special groove-shaped conveying belt, and a square hopper is arranged above the special groove-shaped conveying belt; the bottom of the square hopper is open and is not connected with the conveying belt, the Chinese chestnuts to be processed move forwards along with the conveying belt after entering the hopper, and fall into the single-row long grooves on the conveying belt after being blocked by the front wall of the square hopper and leave the hopper along with the conveying belt; the single-row long grooves drive the chestnuts to be processed to the front end of the conveying belt, naturally fall into a dustpan-shaped slideway below the front end of the conveying belt, and slide to a lower overturning and conveying device at a certain relative speed along with the slideway.

Further, the turning and conveying device is composed of a belt type conveyor belt, after the chestnuts to be processed slide onto the moving conveyor belt at a certain relative speed, the friction force generated between the shells of the chestnuts and the conveyor belt can form turning moment on the gravity center of the chestnuts, so that the chestnuts are turned to be convex upwards and move forwards along with the conveyor belt; the chestnuts to be processed on the conveying belt pass through the guide grooves connected to the frame and are arranged in rows to enter each group of notching devices in sequence to be notched simultaneously.

Further, taking a group of notching devices as an example, the notching devices are composed of a front group of pinch rollers and a rear group of pinch rollers, each group of pinch rollers is composed of a left pinch roller and a right pinch roller which are symmetrical and separated by a certain distance, and the position of the rear group of pinch rollers is fixed and slightly higher than that of the front group; after being transported to the lower part of the rear group of pinch rollers, the chestnuts to be processed continuously move forward to the position of the front group of pinch rollers under the clamping of the pinch roller belts and the conveyor belt; a cutter rest is clamped between the left pinch roller and the right pinch roller of the front group of pinch rollers and is fixedly connected with a wheel shaft, the wheel shaft is limited on the frame through a spring, a serrated circular blade is arranged on the cutter rest, a gear on a blade rotating shaft is meshed with a gear ring on the inner side of the pinch rollers through a reversing gear on the cutter rest, the circular blade and the pinch rollers are reversed, and the circular blade extends out of a gap between the left pinch roller and the right pinch roller by about 1 mm; in addition, the front group of pinch rollers and the tool rest fixedly connected to the wheel shaft can float up and down along with the wheel shaft under the action of the spring, so that the purpose of profiling the convex surface of the Chinese chestnut and performing equal-depth incision treatment is realized; the chestnuts after the cut processing enter a collecting device.

Further, the collecting device is composed of an integrated chute connected to the frame and positioned below each set of the cutting devices; after being processed by the notching device, each group of Chinese chestnuts naturally fall to the inclined groove and slide to the uniform outlet; in addition, the chestnuts leave the notch device and fall into the chute, the chestnuts can be counted one by one through the infrared sensor, and subsequent batch uniform collection is facilitated.

In addition, the power input device on one side of the frame consists of a motor, a speed reducer, a reverse gear and a synchronous belt, and the motor is connected by the speed reducer and then transmits power to a driving shaft of a conveyor belt in the overturning and conveying device; the driving shaft of the conveyor belt is connected with the reversing gear through the synchronous belt and then is connected with a rear pinch roller shaft in the notching device, so that the upper side of the conveyor belt and the lower side of the pinch roller belt move in the same speed and direction, and the chestnut is clamped by the belt to be more stable during notching; meanwhile, the driven shaft of the conveying belt is connected with the driving shaft of the conveying belt through a speed distribution belt, so that the conveying belt and the conveying belt can move at a certain speed relation.

In addition, the main body of the frame bottom moving and parking device is composed of universal wheels, and the wheel side is provided with a rotary button connected with a worm gear mechanism and a spiral lifting rod which are arranged inside, so that the internal parking rod can be controlled to extend out of the opening of the wheel bottom and be supported on the ground, and the machine can be fixed horizontally on uneven ground and work normally.

Compared with the prior art, the utility model has the beneficial effects that:

(1) the Chinese chestnut cutting equipment provided by the utility model is simple and convenient to operate, and the Chinese chestnuts to be processed in batches can be automatically processed by the equipment and conveyed to the collecting device for uniform collection only by being placed in the hopper of the feeding device, so that the automation of the Chinese chestnut cutting processing is completely realized, the manpower is greatly saved, and the working risk is reduced.

(2) The Chinese chestnut cutting equipment provided by the utility model can turn the Chinese chestnut to the convex surface upward and perform equal-depth cutting treatment on the convex surface by designing the turning and conveying device and the cutting device, so that the quality of the Chinese chestnut subjected to cutting treatment is ensured, and the Chinese chestnut cutting equipment is more popular with users.

(3) The Chinese chestnut cutting equipment provided by the utility model designs the cutting blade of the cutting device, so that the cutting blade and the pinch roller are reversely rotated, the Chinese chestnut shell is more easily rotated to cut an opening, the cut of the Chinese chestnut shell is ensured not to be clamped on the cutting blade, and the smoothness of the cutting operation of the equipment is improved.

(4) The Chinese chestnut notching equipment provided by the utility model can be additionally provided with a plurality of groups of notching devices according to the actual use condition, and can realize simultaneous processing of the plurality of groups of notching devices, so that the Chinese chestnuts in large batch can be processed according to different requirements, and the working efficiency is improved.

(5) According to the Chinese chestnut cutting equipment provided by the utility model, the infrared sensors can be additionally arranged at the collecting device to count the processed finished products one by one, so that the processing rate can be conveniently analyzed and adjusted, the processed Chinese chestnuts can be quantitatively collected in batches, and the intellectualization of processing is realized.

(6) The Chinese chestnut cutting equipment provided by the utility model designs the bottom moving and parking device, the equipment is convenient to transport and move by arranging the universal wheels, the equipment can still be horizontally fixed on uneven ground for normal work by arranging the telescopic parking rod, and the adaptability of the equipment to different environments is improved.

Drawings

FIG. 1 is a general isometric view of the present invention.

Fig. 2 is a front elevational, full sectional view of the present invention.

Fig. 3 is a left side view of the present invention.

Figure 4 is a partial isometric view of an incision device in accordance with the utility model.

Fig. 5 is a partially enlarged view of the power input device of the present invention.

FIG. 6 is a partial isometric view of the moving and parking apparatus of the present invention.

The reference numerals are explained below:

1 a frame-type carrier; 2-1 of a square hopper; 2-2 groove-shaped conveying belts; 2-3 dustpan shaped slide; 2-4 conveying a belt driving shaft; 3-1 conveyor belt; 3-2, conveying belt driven shafts; 3-3, a guide groove; 3-4, conveying a belt driving shaft; 4-1 pinch roller belt; 4-2 front pinch rollers; 4-3 rear pinch roller shafts; 4-4 rear pinch rollers; 4-5 front pinch roller shafts; 4-6 springs; 4-7 circular blade with sawtooth edge; 4-8 blade counter gears; 4-9 blade gear shafts; 4-10 tool holders; 4-11 tool holder fixing pins; 5-1 chute; 5-2 infrared sensors; 6-1 motor; 6-2 bevel gear reducers; 6-3 pinch roller counter gear; 6-4 rear wheel shaft gears; 6-5 synchronous pulley belts; 6-6 speed distribution belts; 7-1 wheel body; 7-2 turbine; 7-3 rotation axis; 7-4 worm; 7-5 knobs; 7-6 spiral parking rods; 7-7 universal wheel inner sliding sleeves; 7-8 universal wheel outer sliding sleeves; 7-9 wheel shafts; 7-10 rollers.

Detailed Description

For the purpose of making the purpose, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of one preferred embodiment of the present invention, and are not intended to limit the present invention.

Referring to fig. 1, the present invention provides a rotary cutting type automatic chestnut cutting device, which comprises a frame-type carrier 1, a feeding device 2 positioned on the frame-type carrier 1, an overturning and conveying device 3 positioned below the feeding device 2, a cutting device 4 positioned in front of the conveying device 3, a collecting device 5 positioned below the cutting device 4, a power input device 6 positioned at one side of the frame-type carrier 1, and a moving and parking device 7 positioned at the bottom of the frame-type carrier 1.

Taking the specific working process of the equipment as an example, the working principle of the utility model is as follows:

when the batch of chestnuts to be processed need to be subjected to incision processing, the chestnuts to be processed are placed into a square hopper 2-1, the bottom of the square hopper 2-1 is opened, a groove-shaped conveying belt 2-2 (shown in the attached figure 2) is arranged below the square hopper 2-1, the chestnuts to be processed enter the square hopper 2-1 and then move forward along with the groove-shaped conveying belt 2-2, and the chestnuts fall into grooves on the groove-shaped conveying belt 2-2 and leave from the bottom of the square hopper 2-1 along with the movement of the grooves after being blocked by the front wall of the square hopper 2-1; the chestnuts to be processed naturally fall onto the dustpan-shaped slide way 2-3 below the groove-shaped conveyer belt after moving to the front end of the groove-shaped conveyer belt 2-2, so that the chestnuts slide onto the turning and conveying device 3 below at a certain speed.

Further, when the chestnuts to be processed slide down to the conveyor belt 3-1 (as shown in figure 2), because the contact surfaces have certain relative speed, the friction force generated by the contact surfaces forms overturning moment on the gravity centers of the chestnuts, so that the chestnuts are overturned to have upward convex surfaces and move forwards along with the conveyor belt 3-1 after being stabilized; when the chestnuts pass through the guide grooves 3-3, the chestnuts are guided by the guide grooves 3-3 to be arranged in several rows (3 rows in the figure) and respectively enter the notching devices 4 corresponding to the groups (3 groups in the figure).

Furthermore, after the chestnuts to be processed reach the notching device 4, the chestnuts to be processed sequentially pass through the positions below a left rear pinch roller 4-4 and a right front pinch roller 4-2 (see fig. 2), the rear pinch roller 4-4 is connected with a rear pinch roller shaft 4-5, the front pinch roller 4-2 is connected with a front pinch roller shaft 4-3, the front pinch roller and the rear pinch roller are connected through a pinch roller belt 3-1, the rear pinch roller 4-4 drives the front pinch roller 4-2 to rotate, the position of the rear pinch roller 4-4 is slightly higher than that of the front pinch roller 4-2, and the chestnuts to be processed can enter from the lower part without hindrance; after entering a rear pinch roller 4-4, the gap of the processed Chinese chestnut is gradually narrowed, and the processed Chinese chestnut continues to move forwards under the clamping action of a pinch roller belt 4-1 and a conveyor belt 3-1, and is subjected to incision treatment below a front pinch roller 4-2.

Further, referring to FIG. 3 and FIG. 4, the left and right front pinch rollers 4-2 are symmetrically arranged and provided with a cutter device (4-7 to 4-11) in the middle, a serrated edge circular blade 4-7 protrudes from the gap between the two pinch rollers (about 1mm) and is connected to a blade holder 4-10 through a blade gear shaft 4-9, the blade gear shaft 4-9 is engaged with a gear ring on the inner side of the front pinch roller 4-2 through a blade counter gear 4-8 on the blade holder 4-10, the front pinch roller 4-2 can realize the driven reversal of the circular blade with the sawtooth edge 4-7 under the active rotation, at the moment, the Chinese chestnut to be processed passes under the front pinch roller 4-2 under the clamping of the two belts (3-1, 4-1), the circular blade with sawtooth edges 4-7 which is opposite to the rotation direction of the front pinch roller 4-2 and the Chinese chestnut move relatively to cut the Chinese chestnut shell in a rotating way; preferably, the tool rest 4-10 is fixedly connected with the rear pinch roller shaft 4-3 by a tool rest fixing pin 4-11, the rear pinch roller shaft 4-3 is limited on the frame 1 by a spring 4-6, the front pinch roller 4-2 and the cutter device can be driven to integrally float up and down, and the extending distance of the circular blade 4-7 with the sawtooth edge between the two pinch rollers is ensured to be unchanged; when the Chinese chestnut to be processed passes below the front pinch roller 4-2, the pinch roller 4-2 extrudes the shell of the Chinese chestnut and performs rotary cutting, and simultaneously, the Chinese chestnut can elastically float up and down, so that the purposes of profiling the convex surface of the Chinese chestnut and performing equal-depth incision treatment are achieved.

Furthermore, the chestnuts naturally fall into a collecting device 5 (see fig. 1 and 2) after being subjected to the incision processing, the collecting device 5 consists of chutes 5-1 connected to the frame 1, the chestnuts are processed by the incision devices 4, fall onto the chutes 5-1 and slide along the chutes 5-1 to a uniform outlet to enter an external container (not shown in the figures) for uniform collection; preferably, the infrared sensors 5-2 are arranged below each group of the notching devices 4, so that the processed Chinese chestnuts can be counted one by one, and the batch quantity unified collection of the whole processed Chinese chestnuts can be realized.

In addition, a power input device 6 arranged at one side of the frame 1 can provide power for the working process of the equipment (see fig. 3 and 5), the power input device 6 is composed of a motor 6-1, and the motor 6-1 transmits the power to a belt driving shaft 3-4 through a bevel gear reducer 6-2; meanwhile, power is transmitted to a front pinch roller shaft 4-5 through a pinch roller reversing gear 6-5 by a synchronous belt 6-5 on a driving shaft 3-4 of the conveyor belt, so that the upper side of the belt 3-1 of the conveyor belt and the lower side of the belt 4-1 of the pinch roller move in the same direction and at the same speed, and the belts on two sides are guaranteed to clamp chestnuts to be more stable when incision processing is carried out; in addition, referring to fig. 1, the driven shaft 3-2 of the conveyor belt is connected with the driving shaft 2-4 of the conveyor belt through a speed distribution belt 6-6, so that the conveyor belt 2-2 and the conveyor belt 3-1 can move at a certain speed relation.

In order to facilitate the movement and stable placement of the equipment on poor ground and ensure that the equipment can normally work in various use scenes, the utility model is provided with a moving and parking device 7 (see fig. 1 and 6), the moving and parking device is composed of a wheel body 7-1, one end of the wheel body 7-1 is provided with a universal wheel device (7-7 to 7-10), the pulley 7-10 is connected with an outer sliding sleeve 7-8 through a wheel shaft 7-9, and the relative sliding of the outer sliding sleeve 7-8 and the inner sliding sleeve 7-7 can realize the omnibearing rotation of the pulley 7-10 in the horizontal direction; in addition, a knob 7-5 is arranged outside the wheel body 7-1 and connected with an internal worm 7-4, the worm 7-4 is connected with a rotating shaft 7-3 through a turbine 7-2, and the rotating shaft 7-3 drives a rotating parking rod 7-6 to move through a sliding groove, so that the rotating parking rod can rotate, lift and support the ground and realize self-locking.

The utility model provides automatic Chinese chestnut cutting equipment, which comprises the following operation processes:

the user moves the equipment to a working site through the bottom idler wheel, respectively rotates the knobs above the idler wheels, extends the parking rods from the bottoms of the four casters to support the equipment on the ground, and fixes and keeps the equipment horizontal; then pouring the chestnuts to be processed into a square hopper above the equipment and placing a collecting container at the outlet of a chute of a collecting device; finally, the equipment is powered on and a motor switch is turned on, and the chestnuts pass through the devices of the equipment to realize incision processing and enter a collection container placed by a user.

The above-mentioned embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above-mentioned embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents of the embodiments which achieve the purpose of the present invention, but should fall within the scope of the claims which follow.

Claims (7)

1. The utility model provides a rotatory automatic incision equipment of row's cutting formula chinese chestnut which characterized in that: the device comprises a frame type carrier (1), a power input device (6) arranged on one side of the frame, a moving and parking device (7) arranged at the bottom of the frame, a feeding device (2) arranged at the top of the frame, a turning and conveying device (3) arranged below the feeding device, a cutting device (4) arranged at the front part of the conveying device, and a collecting device (5) arranged at the front part of the cutting device and connected with a box body.

2. The automatic rotary scoring type chestnut slitting device according to claim 1, wherein: the main body of the feeding device (2) is composed of a specially-made groove-shaped conveying belt (2-2), and a square hopper (2-1) is arranged above the main body; the bottom of the square hopper is open and is not connected with the conveying belt, chestnuts to be processed move forwards along with the conveying belt after entering the hopper, fall into the single-row long grooves on the conveying belt after being blocked by the front wall of the square hopper, leave the hopper along with the conveying belt, and slide onto the overturning and conveying device (3) through the dustpan-shaped slide way (2-3).

3. The automatic rotary scoring type chestnut slitting device according to claim 2, wherein: the turning and conveying device (3) main body is composed of a conveying belt, chestnuts to be processed slide to a moving conveying belt (3-1) at a certain relative speed, then are turned over to be upward in the convex surface and move forward along with the conveying belt, and after passing through guide grooves (3-3) connected to a frame, the chestnuts are arranged in rows and enter each group of notching devices (4) in sequence to perform notching treatment simultaneously.

4. The automatic rotary scoring type chestnut slitting device according to claim 3, wherein: the notching device (4) is composed of a front group of pinch rollers and a rear group of pinch rollers, each group of pinch rollers is composed of a left pinch roller and a right pinch roller which are symmetrical and are separated by a certain distance, and the position of the rear group of pinch rollers (4-4) is fixed and is slightly higher than that of the front group; a cutter rest (4-10) is clamped between the left pinch roller and the right pinch roller of the front group of pinch rollers (4-2) and is fixedly connected with the wheel shaft, a serrated circular blade (4-7) is arranged on the cutter rest, a gear on a blade rotating shaft is connected with a reversing gear on the cutter rest and then meshed with a gear ring on the inner side of the pinch rollers, so that the circular blade and the pinch rollers are reversed, and the circular blade extends out of a gap between the left pinch roller and the right pinch roller by about 1 mm; in addition, the front group of pinch rollers and the tool rest fixedly connected to the wheel shaft can float up and down along with the wheel shaft under the action of the spring (4-6) on the rear pinch roller shaft (4-3), so that the purpose of profiling the convex surface of the Chinese chestnut and performing equal-depth incision treatment is realized.

5. The automatic rotary scoring type chestnut slitting device according to claim 4, wherein: the collecting device (5) is composed of an integrated chute (5-1) connected to the frame and is positioned below each group of the notch devices (4); after being processed by the notching device, each group of Chinese chestnuts naturally fall to the inclined groove and slide to the uniform outlet; in addition, when the chestnuts leave the notch device and fall to the inclined groove, the chestnuts can be counted one by one through the arranged infrared sensor (5-2), and subsequent batch uniform collection is facilitated.

6. The automatic rotary scoring type chestnut slitting device according to claim 5, wherein: the power input device (6) consists of a motor, a speed reducer, a reverse gear and a synchronous belt, and the motor (6-1) is connected through the speed reducer (6-2) and then transmits power to a driving shaft (3-4) of a conveyor belt in the overturning and conveying device (3); a driving shaft of the conveyor belt is connected with a reversing gear (6-3) through a synchronous belt (6-5) and then is connected with a front pinch roller shaft (4-5) in the notching device (4), so that the upper side of the conveyor belt and the lower side of the pinch roller belt move in the same direction and at the same speed, and the chestnut is more stably clamped by the belt during notching treatment; meanwhile, the driven shaft (3-2) of the conveying belt is connected with the driving shaft (2-4) of the conveying belt through a speed distribution belt (6-6), so that the conveying belt and the conveying belt are ensured to move at a certain speed relation.

7. The automatic rotary scoring type chestnut slitting device according to claim 6, wherein: the moving and parking device (7) is composed of a wheel body (7-1), one end of the wheel body is provided with a universal wheel device, the pulley (7-10) is connected with an outer sliding sleeve (7-8) through a wheel shaft (7-9), and the relative sliding of the outer sliding sleeve (7-8) and the inner sliding sleeve (7-7) can realize the omnibearing rotation of the pulley in the horizontal direction; in addition, a knob (7-5) is arranged outside the wheel body and connected with an internal worm (7-4), the worm is connected with a rotating shaft (7-3) through a worm wheel (7-2), and the rotating shaft drives a rotating parking rod (7-6) to move through a sliding groove, so that the rotating parking rod can rotate, lift and support the ground and realize self-locking.

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