Lotus seed shelling and sorting machine
The lotus seed shelling and sorting machine addresses excessive crushing and incomplete peeling by using a peeling disc and cutting knife mechanism, and automates sorting with a screening system, ensuring efficient and damage-free peeling and sorting of lotus seeds.
Patent Information
- Application Number
- CN202420650518.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-01
AI Technical Summary
Existing lotus seed shelling devices cause excessive crushing and damage to the fruit, and incomplete peeling, with the added burden of manual sorting post-processing.
A lotus seed shelling and sorting machine with a peeling mechanism using a peeling disc, cutting knife, and spring-actuated extrusion block, combined with a screening system driven by vibration and servo motors for efficient peeling and sorting.
The machine effectively peels lotus seeds without damaging the fruit and automates the sorting process, ensuring complete separation of seeds and skins, reducing manual labor.
Smart Images
Figure CN222171191U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lotus seed processing, in particular to a lotus seed shelling and sorting machine. Background Art
[0002] Lotus seeds, a traditional Chinese medicine, are the dried mature seeds of the lotus plant of the Nymphaeaceae family. They are distributed in provinces in the north and south of China. They have the effects of tonifying the spleen and stopping diarrhea, stopping leukorrhea, benefiting the kidneys and astringing semen, nourishing the heart and calming the mind. They are often used for spleen deficiency diarrhea, leukorrhea, spermatorrhea, palpitations and insomnia.
[0003] When shelling lotus seeds, some existing devices peel them by rotating crushing. During use, it is easy for excessive crushing to damage the fruit and incomplete peeling to occur. In addition, the peeled lotus seeds cannot be sorted in time, and workers are required to carry out sorting processing later, which is quite troublesome. For this reason, we propose a lotus seed shelling and sorting machine. Utility Model Content
[0004] The utility model aims to provide a lotus seed shelling and sorting machine to solve the problem that some existing devices proposed in the above background technology peel the lotus seeds by rotating crushing, which is easy to cause excessive crushing and damage the fruit and incomplete peeling during use, and cannot sort the peeled lotus seeds in time, requiring workers to carry out sorting processing later, which is quite troublesome.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lotus seed shelling and sorting machine, comprising a box body, a reduction motor is fixedly connected to the upper side of the rear side wall of the box body by bolts, the output shaft of the reduction motor extends to the inner cavity of the box body and is fixedly connected to a peeling disc, a semicircular limit block is fixedly connected to the top of the inner cavity of the box body, the front and rear side walls of the inner cavity of the semicircular limit block are respectively slidably connected to the right sides of the front and rear side walls of the outer side wall of the peeling disc, a mounting groove is opened on the top of the peeling disc, the mounting grooves are evenly distributed in an annular shape, a spring is fixedly connected to the bottom of the inner cavity of the mounting groove, and the top of the spring is fixedly connected An extrusion block, the outer wall of the extrusion block is slidably connected to the inner cavity of the mounting groove, the top of the extrusion block extends to the outside of the mounting groove, a knife groove is opened on the right side wall of the inner cavity of the semicircular limit block, a cutting knife is slidably connected to the inner cavity of the knife groove, the left side wall of the cutting knife extends to the inner cavity of the semicircular limit block, a screw rod is screwed on the right side wall of the semicircular limit block, the left end of the screw rod extends to the inner cavity of the knife groove and is rotatably connected to the right side wall of the cutting knife through a bearing, a material box is fixedly connected to the top of the box body, a feeding pipe is inserted at the bottom of the inner cavity of the material box, and the bottom end of the feeding pipe extends to the inner cavity of the box body.
[0006] As a further description of the above technical solution:
[0007] The bottom of the inner cavity of the extrusion block is rotatably connected with a rubber wheel through a pin shaft. The rubber wheel is evenly distributed in an arc shape. The left and right side walls of the extrusion block are provided with notches.
[0008] As a further description of the above technical solution:
[0009] A guide plate is fixedly connected to the top of the inner cavity of the semicircular limit block, the left side wall of the guide plate extends to the side wall of the semicircular limit block and contacts the lower side of the right side wall of the feeding pipe, and an anti-slip pad is provided on the right side wall of the inner cavity of the semicircular limit block.
[0010] As a further description of the above technical solution:
[0011] A peeling outlet is provided on the upper side of the left side wall of the box body, a peeling screen frame is fixedly connected to the upper side of the right side wall of the inner cavity of the box body, a vibration motor is fixedly connected to the left side of the bottom of the peeling screen frame by bolts, the left side wall of the peeling screen frame extends to the outside of the box body, a screening port is provided on the lower side of the right side wall of the box body, and a sliding groove is provided on the bottom of the inner cavity of the box body.
[0012] As a further description of the above technical solution:
[0013] An L-shaped plate is slidably connected to the bottom of the inner cavity of the box body, the bottom of the L-shaped plate extends to the inner cavity of the sliding groove and is slidably connected to the inner cavity of the sliding groove, a first sub-screen frame is fixedly connected to the upper side of the left side wall of the inner cavity of the L-shaped plate, a second sub-screen frame is fixedly connected to the left side wall of the inner cavity of the L-shaped plate, the right side wall of the first sub-screen frame and the right side wall of the second sub-screen frame extend to the outside of the sub-screen opening, and a collection box is provided at the bottom of the inner cavity of the L-shaped plate.
[0014] As a further description of the above technical solution:
[0015] A longitudinal groove is opened on the lower side of the left side wall of the box body, and a support plate is fixedly connected to the lower side of the left side wall of the box body. There are two support plates. The top of the upper support plate is fixedly connected to the servo motor by bolts, and the top of the lower support plate is rotatably connected to a rotating block by a bearing. The top of the rotating block is fixedly connected to the output shaft of the servo motor, and the outer side wall of the rotating block is rotatably connected to a connecting rod. The right end of the connecting rod passes through the longitudinal groove and extends to the inner cavity of the box body and is fixedly connected to a sphere, and the sphere is rotatably connected to the inner cavity of the L-shaped plate.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] 1. The lotus seed shelling and sorting machine drives the cutting knife to move and adjust the cutting depth of the cutting knife by rotating the lead screw, starts the reduction motor through the external controller, and the output shaft of the reduction motor rotates to drive the peeling disc to rotate. Under the action of the guide plate, the lotus seeds squeeze the squeezing block to contract the spring, so that the lotus seeds can be in close contact with the anti-slip pad on the semicircular limit block. The rubber wheel in the squeezing block can realize self-rotation under the drive of the peeling disc, contact with the cutting knife to complete the circular cutting, and continue to rotate to separate the skin from the fruit under the pressure of the spring, so that the lotus seeds can be peeled, and the fruit can be avoided from being damaged and the peeling is incomplete.
[0018] 2. The lotus seed shelling and sorting machine starts the vibration motor and the servo motor respectively through an external controller. The vibration motor cooperates with the peeling screen frame to discharge the lotus seed skin from the skin outlet, and the lotus seeds fall onto the first sub-screen frame. The output shaft of the servo motor rotates to drive the rotating block to rotate through the connecting rod and the ball to drive the L-shaped plate to move back and forth. Under the action of the L-shaped plate, the lotus seeds are discharged through the first sub-screen frame and the second sub-screen frame through the sub-screen opening in turn, and the impurities fall into the collecting box, so that the peeled lotus seeds can be sorted. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural stereoscopic diagram of a lotus seed shelling and sorting machine proposed by the utility model;
[0020] Figure 2 This is a schematic diagram of the front and cross-sectional view of the structure of a lotus seed shelling and sorting machine proposed by the utility model;
[0021] Figure 3 This is a schematic diagram of a left-side sectional view of a lotus seed shelling and sorting machine;
[0022] Figure 4 A lotus seed shelling and sorting machine proposed by the utility model Figure 2 Enlarged structural diagram at A in the middle.
[0023] In the figure: 100, box body; 110, reduction motor; 111, peeling disc; 112, semicircular limit block; 113, mounting groove; 114, spring; 115, extrusion block; 116, knife groove; 117, cutting knife; 118, screw rod; 119, material box; 120, material pipe; 130, rubber wheel; 131, notch; 140, guide plate; 150, skin outlet; 151, peeling screen frame; 152, vibration motor; 153, sub-screening port; 154, sliding groove; 160, L-shaped plate; 161, first sub-screening frame; 162, second sub-screening frame; 163, collecting box; 170, longitudinal groove; 171, support plate; 172, servo motor; 173, rotating block; 174, connecting rod; 175, sphere. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] The utility model provides a lotus seed shelling and sorting machine, which can peel the lotus seeds, avoid damaging the fruit and incomplete peeling, and can sort the peeled lotus seeds. Figure 1-4 , comprising a box body 100;
[0028] Please refer again Figure 1-4A reduction motor 110 is fixedly connected to the upper side of the rear side wall of the box body 100 by bolts. The reduction motor 110 is used to drive the peeling disc 111 to rotate. The output shaft of the reduction motor 110 extends to the inner cavity of the box body 100 and is fixedly connected to the peeling disc 111. The peeling disc 111 is used to drive the lotus seeds to rotate. A semicircular limiting block 112 is fixedly connected to the top of the inner cavity of the box body 100. The semicircular limiting block 112 is used to limit the rotating lotus seeds. The front and rear side walls of the inner cavity of the semicircular limiting block 112 are respectively slidably connected to the right sides of the front and rear side walls of the outer side walls of the peeling disc 111. A mounting groove 113 is opened on the top of the peeling disc 111. The mounting groove 113 is used to install a spring 114 and an extrusion block 115. The mounting grooves 113 are evenly distributed in an annular shape. The bottom of the inner cavity of the mounting groove 113 is fixedly connected with a spring 114, and the spring 114 is used to cooperate with the extrusion block 115 to limit the lotus seeds. The top of the spring 114 is fixedly connected to the extrusion block 115, and the extrusion block 115 is used to limit the lotus seeds. The outer wall of the extrusion block 115 is slidably connected to the inner cavity of the mounting groove 113, and the top of the extrusion block 115 extends to the outside of the mounting groove 113. The right side wall of the inner cavity of the semicircular limiting block 112 is provided with a knife groove 116, and the knife groove 116 is used to install a cutting knife 117. The inner cavity of the knife groove 116 is slidably connected with a cutting knife 117, and the cutting knife 117 is used to cut the lotus seed skin. The left side wall of the cutting knife 117 extends to the inner cavity of the semicircular limiting block 112, and the right side wall of the semicircular limiting block 112 is screwed with a screw rod 1 18, the screw rod 118 is used to adjust the position of the cutting knife 117, the left end of the screw rod 118 extends to the inner cavity of the knife groove 116 and is rotatably connected to the right side wall of the cutting knife 117 through a bearing, the top of the box body 100 is fixedly connected with a material box 119, the material box 119 is used to place the lotus seeds to be peeled, and the bottom of the inner cavity of the material box 119 is plugged with a feeding pipe 120, the material pipe 120 is used for feeding, and the bottom end of the feeding pipe 120 extends to the inner cavity of the box body 100, the bottom of the inner cavity of the extrusion block 115 is rotatably connected with a rubber wheel 130 through a pin shaft, the rubber wheel 130 is used to cooperate with the anti-slip pad when the lotus seeds rotate, and the rubber wheel 130 is evenly distributed in an arc shape, and the left and right side walls of the extrusion block 115 are provided with notches 131, and the notches 131 are used to pass the cutting knife 11 7. A guide plate 140 is fixedly connected to the top of the inner cavity of the semicircular limit block 112. The guide plate 140 is used to guide and extrude the lotus seeds. The left side wall of the guide plate 140 extends to the side wall of the semicircular limit block 112 and contacts the lower side of the right side wall of the feeding pipe 120. The right side wall of the inner cavity of the semicircular limit block 112 is provided with an anti-skid pad. The anti-skid pad increases the friction with the lotus seeds so that the lotus seeds can rotate when the peeling disc 111 rotates. The cutting knife 117 is driven to move and adjust the cutting depth of the cutting knife 117 by rotating the screw rod 118. The reduction motor 110 is started by an external controller. The output shaft of the reduction motor 110 rotates to drive the peeling disc 111 to rotate. Under the action of the guide plate 140, the lotus seeds squeeze the extrusion block 115 to cause the spring 114 to contract.The lotus seeds can be in close contact with the anti-skid pad on the semicircular limit block 112, and the rubber wheel 130 in the cooperating extrusion block 115 can rotate under the drive of the peeling disc 111, contact with the cutting knife 117 to complete the circular cutting, and continue to rotate under the pressure of the spring 114 to separate the skin from the fruit;
[0029] To sum up, the lotus seeds can be peeled to avoid damaging the fruit and incomplete peeling.
[0030] Please refer again Figure 1-2A peel outlet 150 is provided on the upper side of the left side wall of the box body 100, and the peel outlet 150 is used to discharge the lotus seed peels. A peeling screen frame 151 is fixedly connected to the upper side of the right side wall of the inner cavity of the box body 100, and the peeling screen frame 151 is used to filter the lotus seed peels and fruits. A vibration motor 152 is fixedly connected to the left side of the bottom of the peeling screen frame 151 by bolts, and the vibration motor 152 is used to cooperate with the peeling screen frame 151 to sieve out the lotus seed peels. The left side wall of the peeling screen frame 151 extends to the outside of the box body 100, and a sub-screening port 153 is provided on the lower side of the right side wall of the box body 100, and the sub-screening port 153 is used to discharge the screened lotus seeds. A sliding groove 154 is provided at the bottom of the inner cavity of the box body 100, and the sliding groove 154 is used to limit the L-shaped plate 160. The bottom of the inner cavity of the box body 100 is slidably connected with the L-shaped plate 160. The L-shaped plate 160 is used to install the first sub-screen frame 161, the second sub-screen frame 162 and the collecting box 163. The bottom of the L-shaped plate 160 extends to the inner cavity of the sliding groove 154 and is slidably connected to the inner cavity of the sliding groove 154. The upper side of the left side wall of the inner cavity of the L-shaped plate 160 is fixedly connected with the first sub-screen frame 161, and the first sub-screen frame 161 is used to screen larger lotus seeds. The left side wall of the inner cavity of the L-shaped plate 160 is fixedly connected with the second sub-screen frame 162, and the second sub-screen frame 162 is used to remove smaller impurities. The right side wall of the first sub-screen frame 161 and the right side wall of the second sub-screen frame 162 extend to the outside of the sub-screen opening 153. The bottom of the inner cavity of the L-shaped plate 160 is provided with a collecting box 163, and the collecting box 163 is used to collect impurities. The lower side of the left side wall of the box body 100 is provided with a longitudinal groove 170, the longitudinal groove 170 is used to cooperate with the connecting rod 174, the lower side of the left side wall of the box body 100 is fixedly connected with a support plate 171, the support plate 171 is used to install a servo motor 172 and a rotating block 173, the number of support plates 171 is two, the top of the upper support plate 171 is fixedly connected with a servo motor 172 by bolts, the servo motor 172 is used to drive the rotating block 173 to rotate, the top of the lower support plate 171 is rotatably connected with the rotating block 173 through a bearing, the rotating block 173 is used to drive the connecting rod 174 to move, the top of the rotating block 173 is fixedly connected to the output shaft of the servo motor 172, the outer side wall of the rotating block 173 is rotatably connected with the connecting rod 174, the connecting rod 174 is used to install the ball 175, and the right end of the connecting rod 174 passes through The longitudinal groove 170 extends to the inner cavity of the box body 100 and is fixedly connected with a ball 175. The ball 175 is used to connect the L-shaped plate 160 and the connecting rod 174. The ball 175 is rotatably connected to the inner cavity of the L-shaped plate 160. The vibration motor 152 and the servo motor 172 are respectively started by an external controller. The vibration motor 152 cooperates with the peeling screen frame 151 to discharge the lotus seed peel from the skin outlet 150, and the lotus seeds fall onto the first sub-screen frame 161. The output shaft of the servo motor 172 rotates to drive the rotating block 173 to rotate through the connecting rod 174 and the ball 175 to drive the L-shaped plate 160 to reciprocate. Under the action of the L-shaped plate 160, the lotus seeds are discharged through the first sub-screen frame 161 and the second sub-screen frame 162 through the sub-screen opening 153 in sequence, and the impurities fall into the collection box 163.
[0031] In summary, the peeled lotus seeds can be sorted.
[0032] In specific use, a person skilled in the art places lotus seeds in a material box 119, and the seeds fall onto the extrusion block 115 through the material tube 120, and the screw rod 118 is rotated to drive the cutting knife 117 to move and adjust the cutting depth of the cutting knife 117, and the reduction motor 110 is started by an external controller, and the output shaft of the reduction motor 110 rotates to drive the peeling disc 111 to rotate, and the lotus seeds squeeze the extrusion block 115 under the action of the guide plate 140, so that the spring 114 contracts, so that the lotus seeds can be in close contact with the anti-skid pad on the semicircular limit block 112, and the rubber wheel 130 in the extrusion block 115 can realize self-rotation under the drive of the peeling disc 111, and contact with the cutting knife 117 to complete. Circular cutting, continued rotation, under the pressure of the spring 114, the skin is separated from the fruit and falls onto the peeling screen frame 151, the vibration motor 152 and the servo motor 172 are respectively started by the external controller, the vibration motor 152 cooperates with the peeling screen frame 151 to discharge the lotus seed skin from the skin outlet 150, and the lotus seeds fall onto the first sub-screen frame 161, the output shaft of the servo motor 172 rotates to drive the rotating block 173 to rotate through the connecting rod 174 and the ball 175 to drive the L-shaped plate 160 to move back and forth, under the action of the L-shaped plate 160, the lotus seeds are discharged through the first sub-screen frame 161 and the second sub-screen frame 162 through the sub-screen opening 153 in turn, and the impurities fall into the collection box 163.
[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0034] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate 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 claims and their equivalents.
Claims
1. A lotus seed shelling and sorting machine. Features: The invention comprises a box body (100), wherein a reduction motor (110) is fixedly connected to the upper side of the rear side wall of the box body (100) by bolts, the output shaft of the reduction motor (110) extends to the inner cavity of the box body (100) and is fixedly connected to a peeling disc (111), a semicircular limiting block (112) is fixedly connected to the top of the inner cavity of the box body (100), the front and rear side walls of the inner cavity of the semicircular limiting block (112) are respectively slidably connected to the right sides of the front and rear side walls of the outer wall of the peeling disc (111), the top of the peeling disc (111) is provided with a mounting groove (113), the mounting grooves (113) are evenly distributed in an annular shape, the bottom of the inner cavity of the mounting groove (113) is fixedly connected to a spring (114), the top of the spring (114) is fixedly connected to an extrusion block (115), the outer wall of the extrusion block (115) is connected to the mounting groove (111), and the outer wall of the extrusion block (115) is connected to the outer wall of the mounting groove (111). 3), the top of the extrusion block (115) extends to the outside of the mounting groove (113), the right side wall of the inner cavity of the semicircular limiting block (112) is provided with a knife groove (116), the inner cavity of the knife groove (116) is slidably connected with a cutting knife (117), the left side wall of the cutting knife (117) extends to the inner cavity of the semicircular limiting block (112), and the right side wall of the semicircular limiting block (112) is provided with a cutting knife (117). A screw rod (118) is screwed onto the side wall, the left end of the screw rod (118) extends to the inner cavity of the knife groove (116) and is rotatably connected to the right side wall of the cutting knife (117) via a bearing, a material box (119) is fixedly connected to the top of the box body (100), a feeding pipe (120) is inserted into the bottom of the inner cavity of the material box (119), and the bottom end of the feeding pipe (120) extends to the inner cavity of the box body (100).
2. A lotus seed shelling and sorting machine according to claim 1, Features: The bottom of the inner cavity of the extrusion block (115) is rotatably connected to a rubber wheel (130) via a pin shaft. The rubber wheel (130) is evenly distributed in an arc shape. The left and right side walls of the extrusion block (115) are provided with notches (131).
3. A lotus seed shelling and sorting machine according to claim 1, Features: A guide plate (140) is fixedly connected to the top of the inner cavity of the semicircular limit block (112), the left side wall of the guide plate (140) extends to the side wall of the semicircular limit block (112) and contacts the lower side of the right side wall of the feeding pipe (120), and an anti-slip pad is provided on the right side wall of the inner cavity of the semicircular limit block (112).
4. A lotus seed shelling and sorting machine according to claim 1, Features: A peel outlet (150) is provided on the upper side of the left side wall of the box body (100), a peeling screen frame (151) is fixedly connected to the upper side of the right side wall of the inner cavity of the box body (100), a vibration motor (152) is fixedly connected to the left side of the bottom of the peeling screen frame (151) by bolts, the left side wall of the peeling screen frame (151) extends to the outside of the box body (100), a screening port (153) is provided on the lower side of the right side wall of the box body (100), and a sliding groove (154) is provided at the bottom of the inner cavity of the box body (100).
5. A lotus seed shelling and sorting machine according to claim 4, Features: An L-shaped plate (160) is slidably connected to the bottom of the inner cavity of the box body (100), the bottom of the L-shaped plate (160) extends to the inner cavity of the sliding groove (154) and is slidably connected to the inner cavity of the sliding groove (154), a first sub-screen frame (161) is fixedly connected to the upper side of the left side wall of the inner cavity of the L-shaped plate (160), a second sub-screen frame (162) is fixedly connected to the left side wall of the inner cavity of the L-shaped plate (160), the right side wall of the first sub-screen frame (161) and the right side wall of the second sub-screen frame (162) extend to the outside of the sub-screen opening (153), and a collecting box (163) is provided at the bottom of the inner cavity of the L-shaped plate (160).
6. A lotus seed shelling and sorting machine according to claim 5, Features: A longitudinal groove (170) is formed on the lower side of the left side wall of the box body (100), and a support plate (171) is fixedly connected to the lower side of the left side wall of the box body (100). The number of the support plates (171) is two. The top of the upper support plate (171) is fixedly connected to a servo motor (172) by bolts, and the top of the lower support plate (171) is rotatably connected to a rotating block (173) by a bearing. The top of the rotating block (173) is fixedly connected to the output shaft of the servo motor (172). The outer wall of the rotating block (173) is rotatably connected to a connecting rod (174). The right end of the connecting rod (174) passes through the longitudinal groove (170) and extends to the inner cavity of the box body (100) and is fixedly connected to a ball (175). The ball (175) is rotatably connected to the inner cavity of the L-shaped plate (160).