CN212607988U

CN212607988U - Cylinder lithium cell tray enclasping mechanism and enclasping device

Info

Publication number: CN212607988U
Application number: CN202020239991.XU
Authority: CN
Inventors: 曹骥; 曹政; 桑宏宇; 严剑宁; 吴顺进
Original assignee: Zhejiang Hangke Technology Co Ltd
Current assignee: Zhejiang Hangke Technology Co Ltd
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2021-02-26
Anticipated expiration: 2030-03-02

Abstract

A cylindrical lithium battery tray enclasping mechanism and enclasping device, the enclasping mechanism includes the cylinder assembly as the power part, connecting axle assembly used for transmitting power and enclasping assembly used for enclasping the tray, the cylinder assembly is fixed on supporting table of the tray, the movable part of the cylinder assembly is hinged with first end of the connecting axle assembly, the second end of the connecting axle assembly is hinged with installation part of the enclasping assembly; the clamping assembly comprises a revolving body and a clamping part, the revolving body is rotatably arranged on the tray supporting table and is hinged with the second end of the connecting shaft assembly; the holding part is arranged on the revolving body, rotates along with the revolving body and is used for holding the tray left and right and front and back; the holding device comprises a bottom plate and a tray holding unit, and the tray holding unit comprises at least one pair of cylindrical lithium battery tray holding mechanisms. The invention has the beneficial effects that: simple structure, easy assembly, extensive applicability and can be controlled the front and back position and lock the tray.

Description

Cylinder lithium cell tray enclasping mechanism and enclasping device

Technical Field

The utility model relates to a mechanism and device are held tightly to cylinder lithium cell tray belongs to lithium cell test equipment's manufacturing field.

Background

In the testing process of the cylindrical lithium battery, a formation test, a capacity grading test and an OCV test are very important processes. The formation is that the lithium battery is charged with small current to activate active substances in the battery and form an SEI film on the surface of a negative electrode material of the battery; the capacity grading is to perform charge-discharge circulation on the activated batteries, so as to eliminate the problematic batteries and group the batteries according to capacity and internal resistance; the OCV test is to obtain the K value of the battery so as to select lithium battery quality with unqualified electrochemical performance. And in whole formation, partial volume, OCV test, the tray is the important carrier that bears the weight of cylinder lithium cell, in whole test procedure, if appear rocking etc. abnormal conditions when, can lead to battery and probe contact failure in the tray to cause the test result unusual. Therefore, in the whole test, the tray needs to be continuously held and positioned, the tray is ensured to be correct in position and consistent in station, and further the formation test, the capacity grading test and the OCV test are smoothly completed. In that

In the existing battery test technology, the stability of the battery tray is kept by the common cylinder, but in the actual production process, the conditions of insufficient air flow and air flow interruption often occur, so that the tray shakes in the test process, and the test result is unfavorable. In contrast, a locking device for a pallet is proposed in (patent No.: CN208679861U), which can only lock the pallet in one direction by extending a locking piece and unlock the pallet by retracting the locking piece, and the risk of the pallet shaking in the other direction still exists.

Disclosure of Invention

In order to solve the problem, the utility model provides a cylinder lithium cell tray is embraced mechanism and is embraced device tightly has simple structure, easily assembly, extensive applicability and can control the front and back position and lock the tray.

A cylinder lithium cell tray mechanism of holding tightly, its characterized in that: the tray support platform comprises an air cylinder assembly serving as a power component, a connecting shaft assembly used for transmitting power and a holding assembly used for holding a tray tightly, wherein the air cylinder assembly is fixedly arranged on the tray support platform, a movable part of the air cylinder assembly is hinged with a first end of the connecting shaft assembly, and a second end of the connecting shaft assembly is hinged with a mounting part of the holding assembly; the clamping assembly comprises a revolving body and a clamping part, the revolving body is rotatably arranged on the tray support table and is hinged with the second end of the connecting shaft assembly, so that the revolving body is driven by the air cylinder assembly to rotate around a revolving central shaft in the circumferential direction; the holding part is arranged on the revolving body and rotates along with the revolving body, and is used for holding the tray left and right and front and back.

The air cylinder assembly comprises an air cylinder body and an air cylinder fixing seat, the air cylinder fixing seat is fixedly arranged on a tray supporting table of the bottom plate, an air cylinder push rod end of the air cylinder body is connected with the connecting shaft assembly, an air cylinder tail end of the air cylinder body is connected with the air cylinder fixing seat through a rotating shaft supporting column, the air cylinder fixing seat is kept still in the holding action process, and the air cylinder body rotates through the rotating shaft supporting column.

The connecting shaft assembly comprises a connecting pin and a connecting shaft, the first end of the connecting shaft is in threaded connection with the end of the push rod of the air cylinder, and the second end of the connecting shaft is connected with the revolving body shaft clamp of the enclasping assembly through the connecting pin.

The revolving body of the holding assembly comprises a rotating shaft supporting column, a top cover and a thrust cam, and the holding part comprises a Y-axis holding cam, an X-axis clamping cam and a cam barrier strip; the thrust cam is rotatably connected with the bottom plate through a rotating shaft supporting column penetrating through a central hole of the thrust cam, and the extending end of the cam of the thrust cam is connected with the connecting shaft through a connecting pin and used for transmitting the power of the air cylinder; the rotating shaft supporting column is cylindrical, is installed and fixed on the tray supporting table of the bottom plate, is used for fixedly installing other components of the holding assembly, and plays a role in positioning and fixing the holding assembly; the top cover is in a disc shape, is sleeved at the top of the rotating shaft supporting column and is used for limiting the thrust cam to move up and down along the axial direction of the rotating shaft supporting column; the Y-axis enclasping cam is installed and fixed on the upper side of the thrust cam, the fixed end of the Y-axis enclasping cam is fan-shaped, the enclasping extending end of the Y-axis enclasping cam is rectangular, and the outer wall of the tray is located on the motion trail of the enclasping extending end of the Y-axis enclasping cam, so that when the Y-axis enclasping cam synchronously rotates to a locking position along with the thrust cam, the enclasping extending end is in contact with the outer side of the tray to clamp the tray; the X-axis clamping cam is positioned below the cam gasket and is connected with the cam gasket and the thrust cam through screws to form a whole, and the X-axis clamping cam is in an irregular arc shape and synchronously rotates along with the thrust cam and is used for fixing the left position and the right position of the tray; the cam blocking strip is positioned in a gap of the tray blocking block and is used for isolating the tray from the X-axis clamping cam so as to reduce friction between the tray and the X-axis clamping cam.

And a cam gasket is sleeved on the rotating shaft supporting column between the thrust cam and the X-axis clamping cam and used for buffering between the thrust cam and the X-axis clamping cam.

The thrust cam comprises a cam main body and a cam extending end, the shape of the cam main body is similar to that of the kidney-shaped hole, namely two ends of the orthographic projection of the cam main body on the bottom plate are convex arcs, and the middle of the orthographic projection of the cam main body is rectangular; the cam extending end is arranged at the end part of the cam main body and is connected with the second end shaft of the connecting shaft in a clamping mode through a connecting pin.

The extension end of the Y-axis enclasping cam and the enclasping end of the X-axis enclasping cam are located on one side, facing the tray, of the thrust cam, and the enclasping extension end of the Y-axis enclasping cam is aligned with a groove in the outer side wall of the tray.

The utility model provides a device of hugging closely of cylinder lithium cell tray which characterized in that: the tray that embraces the tray including the bottom plate that is used for supporting the tray and is used for embracing the tray tightly embraces the unit, the tray embrace the unit including at least a pair of the cylinder lithium cell tray embrace the mechanism tightly, wherein, the tray is embraced the mechanism tightly with the tray and is installed on the tray brace table of bottom plate, the tray is embraced the constitution of mechanism tightly and is unanimous completely with the installation, arranges in the both sides of tray separately, and all parts that the mechanism was embraced to the tray become the mirror image relation.

Utilize a method that device held tightly of cylinder lithium cell tray carry out holding tightly to the tray, including following step:

1) when the battery tray is in place, the tray holding signal lamp indicates that the tray holding mechanism starts to act;

2) the air cylinder component of the tray enclasping mechanism acts to push the cam to rotate under the push of the connecting shaft component, so as to drive the X-axis clamping cam and the Y-axis enclasping cam to rotate;

3) x-axis clamping cams on the left side and the right side of the tray act simultaneously, and therefore the left position and the right position of the tray are fixed;

4) the Y-axis enclasping cams on the left side and the right side of the tray act simultaneously to push the tray forward and backward, and when the position of the tray reaches the position of the limiting block in front of the tray, the Y-axis enclasping cams stop acting and are clamped into the grooves of the tray to clamp the tray tightly, so that the front position and the rear position of the tray are fixed.

The beneficial effects of the utility model are embodied in: firstly, the tray enclasping mechanism has a simple structure, and is easy to install, replace and maintain; second, this tray enclasping mechanism can not only control the position fixed to the tray, but also can fix the tray front and back position, after the action of whole enclasping, the tray can accomplish that the center is stable unchangeable, has greatly improved the exactness of lithium cell test result like this. Thirdly, this tray enclasping mechanism is applicable to the tray of multiple size, and extensive applicability can effectively reduce redesign.

Drawings

FIG. 1 is a structural view of a pallet clasping mechanism;

FIG. 2 is a front view of the tray clasping mechanism;

FIG. 3 is a top view of the tray clasping mechanism;

FIG. 4 is a block diagram of a cylinder assembly of the pallet cinching mechanism;

FIG. 5 is a block diagram of a connecting shaft assembly of the pallet clasping mechanism;

FIG. 6 is a front view of a clasping assembly of the pallet clasping mechanism;

FIG. 7 is a top plan view of a clasping assembly of the pallet clasping mechanism;

FIG. 8 is a diagram showing a state that the tray clasping mechanism clasps the tray and does not work;

fig. 9 shows a normal working state diagram of the holding mechanism of the tray.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

With reference to the accompanying drawings:

embodiment 1 the utility model discloses a cylinder lithium battery tray enclasping mechanism, including cylinder assembly 1 as the power part, connecting axle subassembly 2 and enclasping subassembly 3 for enclasping the tray for the transmission power, cylinder assembly 1 is fixed on the tray supporting bench, and the movable part of cylinder assembly 1 is articulated with the first end of connecting axle subassembly 2, the second end of connecting axle subassembly 2 is articulated with the installation department of enclasping subassembly 3; the enclasping component 3 comprises a revolving body and an enclasping part, the revolving body is rotatably arranged on the tray supporting table and is hinged with the second end of the connecting shaft component 2, so that the revolving body is driven by the air cylinder component 1 to rotate around a revolving central shaft in the circumferential direction; the holding part is arranged on the revolving body and rotates along with the revolving body, and is used for holding the tray left and right and front and back.

The air cylinder assembly 1 comprises an air cylinder body 11 and an air cylinder fixing seat 12, the air cylinder fixing seat 12 is fixedly arranged on a tray supporting table of the bottom plate 7, an air cylinder push rod end of the air cylinder body 11 is connected with the connecting shaft assembly 2, an air cylinder tail end of the air cylinder body 11 is connected with the air cylinder fixing seat 12 through a rotating shaft supporting column 113, the air cylinder fixing seat 12 is kept still in the holding action process, and the air cylinder body 11 rotates through the rotating shaft supporting column 113.

The connecting shaft assembly 2 comprises a connecting pin 21 and a connecting shaft 22, the first end of the connecting shaft 22 is in threaded connection with the end of a push rod of the air cylinder, and the second end of the connecting shaft 22 is connected with a rotary body shaft of the enclasping assembly 3 through the connecting pin 22.

The revolving body of the clasping component 3 comprises a rotating shaft supporting column 31, a top cover 32 and a thrust cam 34, and the clasping part comprises a Y-axis clasping cam 33, an X-axis clamping cam 36 and a cam barrier strip 37; the thrust cam 34 is rotatably connected with the bottom plate 7 through a rotating shaft supporting column 31 penetrating through a central hole of the thrust cam, and the protruding end of the cam of the thrust cam 34 is connected with the connecting shaft 22 through a connecting pin 21 and used for transmitting the power of the cylinder; the rotating shaft supporting column 31 is cylindrical, is installed and fixed on the tray supporting table of the bottom plate 7, is used for fixedly installing other components of the holding component 3, and plays a role in positioning and fixing the holding component; the top cover 32 is in a disc shape, is sleeved on the top of the rotating shaft supporting column 31, and is used for limiting the thrust cam 34 to move up and down along the axial direction of the rotating shaft supporting column 31; the Y-axis enclasping cam 33 is fixedly installed on the upper side of the thrust cam 34, the fixed end of the Y-axis enclasping cam 33 is in a fan shape, the enclasping extending end of the Y-axis enclasping cam 33 is in a rectangular shape, and the outer wall of the tray is located on the motion trail of the enclasping extending end of the Y-axis enclasping cam 33, so that when the Y-axis enclasping cam 33 synchronously rotates to a locking position along with the thrust cam 34, the enclasping extending end is in contact with the outer side of the tray; the X-axis clamping cam 36 is positioned below the cam gasket 35 and is connected with the cam gasket 35 and the thrust cam 34 through screws to form a whole, and the X-axis clamping cam 36 is in an irregular arc shape and synchronously rotates along with the thrust cam 34 and is used for fixing the left position and the right position of the tray; the cam bars 37 are located in the slots of the tray stops to isolate the tray from the X-axis clamping cam to reduce friction between the two.

The rotating shaft supporting column 31 between the thrust cam 34 and the X-axis clamping cam 36 is sleeved with a cam gasket 35 for buffering between the thrust cam 35 and the X-axis clamping cam 36.

The thrust cam 34 comprises a cam main body and a cam extending end, the shape of the cam main body is similar to that of the kidney-shaped hole, namely two ends of the orthographic projection of the cam main body on the bottom plate are convex arcs, and the middle of the orthographic projection of the cam main body is rectangular; the cam extending end is arranged at the end part of the cam main body and is connected with the second end shaft of the connecting shaft in a clamping mode through a connecting pin.

The holding extending end of the Y-axis holding cam 33 and the holding end of the X-axis clamping cam 36 are positioned on one side of the thrust cam facing the tray, and the holding extending end of the Y-axis holding cam 33 is aligned with the groove on the outer side wall of the tray 6.

The arcuate curvature of the X-axis clamping cam 36 decreases from the outside inward.

Embodiment 2 a cylinder lithium cell tray hold device tightly, hold the unit tightly including the tray that is used for supporting the bottom plate 7 of tray and is used for holding the tray tightly, the tray holds the unit tightly and includes a pair of embodiment 1 cylinder lithium cell tray hold mechanism tightly, wherein, tray and tray hold mechanism tightly and install on the tray brace table of bottom plate, the constitution that the mechanism was held tightly to the tray is unanimous completely with the installation, the branch is listed in the both sides at the tray, all parts that the mechanism was held tightly to the tray become the mirror image relation.

The tray clasping mechanism comprises:

the cylinder assembly 1 is a power component and provides required power for the holding action of the holding assembly 3.

The connecting shaft component 2 is a movable joint and is used for connecting the air cylinder component 1 and the holding component 3, transmitting the power of the air cylinder component 1 to the holding component 3 and further pushing the holding component 3 to lock the tray 6.

The holding component 3 is a functional component and is mainly used for holding the tray 6 left and right and front and back.

The air cylinder assembly 1 comprises an air cylinder body 11 and an air cylinder fixing seat 12, the air cylinder fixing seat 12 is installed on the bottom plate 7, an air cylinder tail end 111 of the air cylinder body 11 is connected with the air cylinder fixing seat 12 through a rotating shaft supporting column 113, and an air cylinder push rod end 112 is connected with the connecting shaft assembly 2. In the clasping operation, the cylinder fixing base 12 is kept stationary, and the cylinder body 11 is rotated by the rotation shaft support column 113.

The connecting shaft assembly 2 comprises a connecting pin 21 and a connecting shaft 22, the connecting pin 21 enables the connecting shaft 22 to be connected with the thrust cam 34 in series to play a role of a pin shaft, and the connecting shaft 22 is in threaded connection with the cylinder push rod end 112 and is in shaft clamping connection with the thrust cam 34.

The holding component 3 comprises a rotating shaft supporting column 31, a top cover 32, a Y-axis holding cam 33, a thrust cam 34, a cam gasket 35, an X-axis clamping cam 36 and a cam blocking strip 37. The rotating shaft supporting column 31 is cylindrical, is fixedly installed on the base plate 7 and is used for fixedly installing other parts of the holding component 3 and playing roles in positioning and fixing the holding component 3. The top cover 32 is in a disc shape, is fixed on the rotating shaft supporting column 31, is located right above the thrust cam 34, and is used for limiting the up-and-down movement of the thrust cam 34. The Y-axis enclasping cam 33 is installed and fixed on the upper side of the thrust cam 34, the fixed end of the Y-axis enclasping cam 33 is fan-shaped, the enclasping extending end is rectangular, after the air cylinder assembly 1 is pushed, the Y-axis enclasping cam 33 rotates along with the thrust cam 34, then the extending end of the Y-axis enclasping cam 33 contacts with the outer side of the tray 6, and the tray 6 is pushed and clamped. The thrust cam 34, the cam protruding end of the thrust cam 34 is connected with the connecting shaft 22 through the connecting pin 21, and is used for transmitting the power of the cylinder. The cam shim 35 is located directly below the thrust cam 34 and directly above the X-axis clamping cam 36, and is used for the function of the thrust cam 34X-axis clamping cam 36 and the function of enhancing the strength of the cam mechanism. X axle clamping cam 36 is located cam shim 35 below, and is connected through the screw between cam shim 35 and the thrust cam 34 three and constitutes wholly, and X axle clamping cam 36 is made with the ABS material, and for irregular circular arc shape, irregular circular arc shape is favorable to fixed tray position fine setting, and when thrust cam 34 rotated, X axle clamping cam 36 also rotated thereupon together, and at the pivoted in-process, X axle clamping cam 36 controlled the position fixing to tray 6, and then guaranteed the accuracy of position about tray 6. The cam barrier strip 37 is located in a gap of the tray 6 stopper, is made of a high-elasticity 304 stainless steel sheet, and is used for isolating the tray 6 from the X-axis clamping cam 36 and reducing friction between the tray 6 and the X-axis clamping cam 36.

Example 3 this example differs from example 1 in that: as shown in fig. 1, 2 and 3, the tray clasping mechanism mainly comprises three parts, namely a cylinder assembly, a connecting shaft assembly and a clasping assembly, wherein the connecting shaft assembly is positioned between the cylinder assembly and the clasping assembly.

As seen from figure 4, the cylinder is composed of a cylinder body and a cylinder fixing seat, the tail end of the cylinder is connected with the cylinder fixing seat through a rotating shaft supporting column, and the push rod end of the cylinder is connected with a connecting shaft.

As shown in fig. 5, the connecting shaft assembly includes a connecting pin and a connecting shaft, the connecting pin connects the connecting shaft with the clasping assembly, and the connecting shaft is connected with the push rod end of the cylinder.

It is seen from fig. 6 and 7 that the clasping assembly mainly comprises a rotating shaft supporting column, a top cover, a Y-axis clasping cam, a thrust cam, a cam gasket and an X-axis clasping cam, wherein the rotating shaft supporting column is a cylinder, the top cover is arranged above the center of the thrust cam, the Y-axis clasping cam is arranged on the upper side of the thrust cam, the cam gasket is arranged below the thrust cam, and the X-axis clasping cam is arranged below the cam gasket.

Embodiment 4 utilizes a cylinder lithium cell tray enclasping mechanism hold tightly the tray, its enclasping mode of action is following step:

The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention includes equivalent technical means that can be conceived by those skilled in the art based on the inventive concepts.

Claims

1. The utility model provides a mechanism is held tightly to cylinder lithium cell tray which characterized in that: the tray support platform comprises an air cylinder assembly serving as a power component, a connecting shaft assembly used for transmitting power and a holding assembly used for holding a tray tightly, wherein the air cylinder assembly is fixedly arranged on the tray support platform, a movable part of the air cylinder assembly is hinged with a first end of the connecting shaft assembly, and a second end of the connecting shaft assembly is hinged with a mounting part of the holding assembly; the clamping assembly comprises a revolving body and a clamping part, the revolving body is rotatably arranged on the tray support table and is hinged with the second end of the connecting shaft assembly, so that the revolving body is driven by the air cylinder assembly to rotate around a revolving central shaft in the circumferential direction; the holding part is arranged on the revolving body and rotates along with the revolving body, and is used for holding the tray left and right and front and back.

2. The cylindrical lithium battery tray clasping mechanism of claim 1, wherein: the air cylinder assembly comprises an air cylinder body and an air cylinder fixing seat, the air cylinder fixing seat is fixedly arranged on a tray supporting table of the bottom plate, an air cylinder push rod end of the air cylinder body is connected with the connecting shaft assembly, an air cylinder tail end of the air cylinder body is connected with the air cylinder fixing seat through a rotating shaft supporting column, the air cylinder fixing seat is kept still in the holding action process, and the air cylinder body rotates through the rotating shaft supporting column.

3. The cylindrical lithium battery tray clasping mechanism of claim 1, wherein: the connecting shaft assembly comprises a connecting pin and a connecting shaft, the first end of the connecting shaft is in threaded connection with the end of the push rod of the air cylinder, and the second end of the connecting shaft is connected with the revolving body shaft clamp of the enclasping assembly through the connecting pin.

4. The cylindrical lithium battery tray clasping mechanism of claim 1, wherein: the revolving body of the holding assembly comprises a rotating shaft supporting column, a top cover and a thrust cam, and the holding part comprises a Y-axis holding cam, an X-axis clamping cam and a cam barrier strip; the thrust cam is rotatably connected with the bottom plate through a rotating shaft supporting column penetrating through a central hole of the thrust cam, and the extending end of the cam of the thrust cam is connected with the connecting shaft through a connecting pin and used for transmitting the power of the air cylinder; the rotating shaft supporting column is cylindrical and is fixedly arranged on the tray supporting table of the bottom plate; the top cover is in a disc shape, is sleeved at the top of the rotating shaft supporting column and is used for limiting the thrust cam to move up and down along the axial direction of the rotating shaft supporting column; the Y-axis enclasping cam is installed and fixed on the upper side of the thrust cam, the fixed end of the Y-axis enclasping cam is fan-shaped, the enclasping extending end of the Y-axis enclasping cam is rectangular, and the outer wall of the tray is located on the motion trail of the enclasping extending end of the Y-axis enclasping cam, so that when the Y-axis enclasping cam synchronously rotates to a locking position along with the thrust cam, the enclasping extending end is in contact with the outer side of the tray to clamp the tray; the X-axis clamping cam is positioned below the cam gasket and is connected with the cam gasket and the thrust cam through screws to form a whole, and the X-axis clamping cam is arc-shaped and synchronously rotates along with the thrust cam and is used for fixing the left position and the right position of the tray; the cam blocking strip is positioned in a gap of the tray blocking block and is used for isolating the tray from the X-axis clamping cam so as to reduce friction between the tray and the X-axis clamping cam.

5. The cylindrical lithium battery tray clasping mechanism as claimed in claim 4, wherein: and a cam gasket is sleeved on the rotating shaft supporting column between the thrust cam and the X-axis clamping cam and used for buffering between the thrust cam and the X-axis clamping cam.

6. The cylindrical lithium battery tray clasping mechanism as claimed in claim 5, wherein: the thrust cam comprises a cam main body and a cam extending end, the shape of the cam main body is similar to that of the kidney-shaped hole, namely two ends of the orthographic projection of the cam main body on the bottom plate are convex arcs, and the middle of the orthographic projection of the cam main body is rectangular; the cam extending end is arranged at the end part of the cam main body and is connected with the second end shaft of the connecting shaft in a clamping mode through a connecting pin.

7. The cylindrical lithium battery tray clasping mechanism as claimed in claim 6, wherein: the extension end of the Y-axis enclasping cam and the enclasping end of the X-axis enclasping cam are located on one side, facing the tray, of the thrust cam, and the enclasping extension end of the Y-axis enclasping cam is aligned with a groove in the outer side wall of the tray.

8. The cylindrical lithium battery tray clasping mechanism as claimed in claim 4, wherein: the arc curvature of the X-axis clamping cam is gradually reduced from outside to inside.

9. The utility model provides a device of hugging closely of cylinder lithium cell tray which characterized in that: the cylindrical lithium battery tray enclasping mechanism comprises a bottom plate and a tray enclasping unit, the bottom plate is used for supporting a tray, the tray enclasping unit is used for enclasping the tray, the tray enclasping unit comprises at least one pair of cylindrical lithium battery tray enclasping mechanisms according to any one of claims 1 to 7, the tray and the tray enclasping mechanisms are installed on a tray supporting table of the bottom plate, the composition and installation of the tray enclasping mechanisms are completely consistent, the tray enclasping mechanisms are respectively arranged on two sides of the tray, and all parts of the tray enclasping mechanisms are in mirror image relation.