CN213440415U - Full-automatic batching device for concrete production - Google Patents

Abstract

The utility model discloses a full-automatic dosing unit is used in concrete production, including the dosing unit body, the top of dosing unit body is provided with the funnel body, the equal fixedly connected with support column in front side and the rear side of funnel body both sides, the constant head tank that uses with the support column cooperation is all seted up to the front side and the rear side of dosing unit body both sides, and the movable groove has been seted up to the relative one side of left side constant head tank and right side constant head tank. Through the cooperation that sets up dosing unit body, funnel body, support column, constant head tank, movable groove, fixed establishment, fixed slot, rotation groove, adjustment mechanism, spacing groove, stop gear, first through-hole, fourth through-hole, fifth through-hole, sixth through-hole and seventh through-hole are used, it is not convenient for fix to have solved current funnel, can waste a large amount of time and efforts of user at fixed in-process, user's work efficiency has been reduced, the problem that the user used to the proportioning machine has been influenced.

Description

Full-automatic batching device for concrete production

Technical Field

The utility model belongs to the technical field of the concrete production, especially, relate to a full-automatic batching device is used in concrete production.

Background

Concrete proportioning machine also is called proportioning machine, grit automatic blending machine, is one kind and is used for multiple material like: the automatic quantitative sandstone distributing equipment is used mainly in concrete construction industry to replace manual platform scale, volume metering and other modes.

Carry out the ration delivery of grit when producing concrete and need use the proportioning machine to weigh the grit, to sum up, the problem that prior art exists is: be not convenient for fix the funnel, can waste a large amount of time of user and energy at fixed in-process, reduced user's work efficiency, influenced the use of user to the proportioning machine.

SUMMERY OF THE UTILITY MODEL

Problem to prior art exists, the utility model provides a full-automatic dosing unit is used in concrete production possesses the advantage of being convenient for carry out the fixing to the funnel, has solved current funnel and has not been convenient for fix, can waste a large amount of time of user and efforts at fixed in-process, has reduced user's work efficiency, has influenced the problem that the user used to the proportioning machine.

The utility model is realized in such a way, a full-automatic batching device for concrete production comprises a batching device body, wherein the top of the batching device body is provided with a funnel body, the front side and the rear side of the two sides of the funnel body are fixedly connected with a support column, the front side and the rear side of the two sides of the batching device body are both provided with positioning grooves matched with the support column for use, one side of the left side positioning groove opposite to the right side positioning groove is provided with a movable groove, one side of the movable groove close to the support column is provided with a fixing mechanism, one side of the support column close to the movable groove is provided with a fixing groove matched with the fixing mechanism for use, the bottom of the movable groove is provided with a rotating groove, the inner cavity of the rotating groove is provided with an adjusting mechanism matched with the fixing mechanism for use, one side of the movable groove top far away from the positioning groove is, the top of the movable groove is provided with a first through hole matched with the adjusting mechanism.

As the utility model discloses it is preferred, fixing mechanism includes the stopper, one side fixedly connected with fixed column that the stopper is close to the constant head tank, the surface cover of fixed column is equipped with the extension spring, one side that the stopper was kept away from to the fixed column runs through the dosing unit body and extends to the inner chamber of fixed slot, one side fixedly connected with dead lever of fixed column is kept away from to the stopper, the second through-hole that uses with adjustment mechanism cooperation is seted up at the top of dead lever, the draw-in groove that uses with stop gear cooperation is seted up to one side that the stopper was kept away from.

As the utility model discloses it is preferred, adjustment mechanism includes the reference column, the equal fixedly connected with locating plate in front side and the rear side of reference column, the surperficial cover of reference column is equipped with the regulation pole, the top of adjusting the pole passes second through-hole and first through-hole in proper order and extends to the outside of dosing unit body, the front side of adjusting the pole is opened and is equipped with the third through-hole, the inner chamber of third through-hole is provided with the regulation post.

As the utility model discloses it is preferred, stop gear includes the limiting plate, the spacing post of bottom fixedly connected with of limiting plate, the inner chamber of dosing unit body and extension to activity groove is run through to the bottom of spacing post, the top fixedly connected with gag lever post of limiting plate, the surperficial cover of gag lever post is equipped with the spring, the top of gag lever post is run through the dosing unit body and is extended to the outside and the fixedly connected with pull ring of dosing unit body.

As the utility model discloses it is preferred, the support column is close to one side of constant head tank inner wall and the inner wall contact of constant head tank, the dosing unit body is close to one side of fixed column and offers the fourth through-hole that uses with the fixed column cooperation, fifth through-hole and the sixth through-hole that uses with spacing post and gag lever post cooperation are all offered to one side that the dosing unit body is close to spacing post and gag lever post.

As the utility model is preferable, one side of the limiting block close to the inner wall of the movable groove is contacted with the inner wall of the movable groove, one side of the fixed column close to the inner wall of the fixed groove is contacted with the inner wall of the fixed groove, one side of the tension spring close to the limiting block and one side of the tension spring far away from the limiting block are respectively and fixedly connected with the limiting block and the inner wall of the movable groove, the bottom of the positioning plate is fixedly connected with the inner wall of the rotating groove, one side of the adjusting rod close to the positioning column is provided with a seventh through hole matched with the positioning column for use, one side of the positioning column close to the inner wall of the seventh through hole is contacted with the inner wall of the seventh through hole, the front side and the rear side of the adjusting column are both fixedly connected with the inner wall of the second through hole, one side of the adjusting rod close to the inner walls of the first, one side that spacing post is close to the fifth through-hole inner wall contacts with the inner wall of fifth through-hole, one side that the gag lever post is close to the sixth through-hole inner wall contacts with the inner wall of sixth through-hole, the top and the bottom of spring respectively with the inner wall of spacing groove and the top fixed connection of limiting plate.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a set up dosing unit body, funnel body, support column, constant head tank, movable groove, fixed establishment, fixed slot, rotation groove, adjustment mechanism, spacing groove, stop gear, first through-hole, fourth through-hole, fifth through-hole, sixth through-hole and seventh through-hole's cooperation and use, it is not convenient for fix to have solved current funnel, can waste a large amount of time and efforts of user at fixed in-process, has reduced user's work efficiency, has influenced the problem that the user used to the proportioning machine.

2. The utility model discloses a set up fixed establishment, can play the fixed action to the support column, the person of facilitating the use fixes the funnel body.

3. The utility model discloses a set up adjustment mechanism, can play the regulating action to fixed establishment, the person of facilitating the use uses fixed establishment.

4. The utility model discloses a set up stop gear, can play limiting displacement to fixed establishment, can the person of facilitating the use carry on spacingly to fixed establishment.

5. The utility model discloses a set up the constant head tank, can play the positioning action to the support column, through setting up the fourth through-hole, can make things convenient for the fixed column to remove, through setting up fifth through-hole and sixth through-hole, can play limiting displacement to spacing post and gag lever post respectively.

6. The utility model can limit the fixed column by arranging the limiting block, prevent the fixed column from separating from the inner cavity of the movable groove, the supporting column can be limited by arranging the fixing column and the fixing groove, the limiting block can be reset by arranging the tension spring, the positioning plate can position the adjusting rod, the positioning column can rotate the fixing rod on the surface of the positioning column, the adjusting column can drive the fixing rod to move through the fixing rod, the limiting plate can limit the limiting column and the limiting rod, the limiting column and the limiting rod can be prevented from being separated from the inner cavity of the limiting groove, through setting up spacing post and draw-in groove, can play limiting displacement to the dead lever, through setting up the gag lever post, can play the regulatory action to the position of limiting plate, through setting up the spring, can play the reset action to the limiting plate.

Drawings

Fig. 1 is a schematic structural diagram provided in an embodiment of the present invention;

fig. 2 is a partial cross-sectional view of an embodiment of the invention providing a front view;

fig. 3 is a partial enlarged view of a portion a of fig. 1 according to an embodiment of the present invention;

fig. 4 is a partial enlarged view of the embodiment of the present invention shown in fig. 2 at B;

fig. 5 is a partial enlarged view of the embodiment of the present invention at C in fig. 2;

fig. 6 is a partial enlarged view of the embodiment of the present invention shown in fig. 2 at D.

In the figure: 1. a dosing device body; 2. a funnel body; 3. a support pillar; 4. positioning a groove; 5. a movable groove; 6. a fixing mechanism; 7. fixing grooves; 8. a rotating groove; 9. an adjustment mechanism; 10. a limiting groove; 11. a limiting mechanism; 12. a first through hole; 13. a fourth via hole; 14. a fifth through hole; 15. a sixth through hole; 16. a seventh via hole; 601. a limiting block; 602. fixing a column; 603. a tension spring; 604. fixing the rod; 605. a second through hole; 606. a card slot; 901. a positioning column; 902. positioning a plate; 903. adjusting a rod; 904. a third through hole; 905. an adjustment column; 1101. a limiting plate; 1102. a limiting column; 1103. a limiting rod; 1104. a spring; 1105. and (4) a pull ring.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

The structure of the present invention will be described in detail with reference to the accompanying drawings.

As shown in figures 1 to 6, the full-automatic batching device for concrete production provided by the embodiment of the utility model comprises a batching device body 1, a funnel body 2 is arranged on the top of the batching device body 1, a support column 3 is fixedly connected on the front side and the rear side of the two sides of the funnel body 2, positioning slots 4 matched with the support column 3 for use are arranged on the front side and the rear side of the two sides of the batching device body 1, a movable slot 5 is arranged on the side opposite to the left side positioning slot 4 and the right side positioning slot 4, a fixing mechanism 6 is arranged on the side of the movable slot 5 close to the support column 3, a fixed slot 7 matched with the fixing mechanism 6 for use is arranged on the side of the support column 3 close to the movable slot 5, a rotating slot 8 is arranged on the bottom of the movable slot 5, an adjusting mechanism 9 matched with the fixing mechanism 6 for use is arranged in the inner cavity of the rotating slot, the inner cavity of the limiting groove 10 is provided with a limiting mechanism 11 matched with the fixing mechanism 6 for use, and the top of the movable groove 5 is provided with a first through hole 12 matched with the adjusting mechanism 9 for use.

Referring to fig. 2 and 4, fixing mechanism 6 includes stopper 601, one side fixedly connected with fixed column 602 that stopper 601 is close to constant head tank 4, the surface cover of fixed column 602 is equipped with extension spring 603, one side that stopper 601 was kept away from to fixed column 602 runs through dosing unit body 1 and extends to the inner chamber of fixed slot 7, one side fixedly connected with dead lever 604 that stopper 602 was kept away from to fixed column 601, second through-hole 605 that uses with adjustment mechanism 9 cooperation is seted up at the top of dead lever 604, draw-in groove 606 that uses with stop mechanism 11 cooperation is seted up to one side that stopper 601 was kept away from at the dead lever 604.

Adopt above-mentioned scheme: through setting up fixed establishment 6, can play the fixed action to support column 3, the person of facilitating the use fixes funnel body 2.

Referring to fig. 2, 4 and 5, the adjusting mechanism 9 includes a positioning column 901, a positioning plate 902 is fixedly connected to both the front side and the rear side of the positioning column 901, an adjusting rod 903 is sleeved on the surface of the positioning column 901, the top of the adjusting rod 903 sequentially penetrates through the second through hole 605 and the first through hole 12 and extends to the outer side of the batching device body 1, a third through hole 904 is formed in the front side of the adjusting rod 903, and an adjusting column 905 is arranged in the inner cavity of the third through hole 904.

Adopt above-mentioned scheme: through setting up adjustment mechanism 9, can play the regulatory action to fixed establishment 6, the person of facilitating the use uses fixed establishment 6.

Referring to fig. 2 and 6, the limiting mechanism 11 includes a limiting plate 1101, a limiting column 1102 is fixedly connected to the bottom of the limiting plate 1101, the bottom of the limiting column 1102 penetrates through the batching device body 1 and extends to the inner cavity of the movable groove 5, a limiting rod 1103 is fixedly connected to the top of the limiting plate 1101, a spring 1104 is sleeved on the surface of the limiting rod 1103, and a pull ring 1105 is fixedly connected to the outside of the batching device body 1 and extends to the top of the limiting rod 1103 through the batching device body 1.

Adopt above-mentioned scheme: through setting up stop gear 11, can play limiting displacement to fixed establishment 6, can convenience of customers carry on spacingly to fixed establishment 6.

Referring to fig. 2, 4 and 6, one side of the supporting column 3 close to the inner wall of the positioning groove 4 contacts with the inner wall of the positioning groove 4, one side of the batching device body 1 close to the fixing column 602 is provided with a fourth through hole 13 matched with the fixing column 602 for use, and one side of the batching device body 1 close to the limiting column 1102 and the limiting rod 1103 is provided with a fifth through hole 14 and a sixth through hole 15 matched with the limiting column 1102 and the limiting rod 1103 for use.

Adopt above-mentioned scheme: through setting up constant head tank 4, can play the positioning action to support column 3, through setting up fourth through-hole 13, can make things convenient for fixed column 602 to remove, through setting up fifth through-hole 14 and sixth through-hole 15, can play limiting displacement to spacing post 1102 and gag lever post 1103 respectively.

Referring to fig. 2, 4, 5 and 6, one side of the limiting block 601 close to the inner wall of the movable groove 5 contacts with the inner wall of the movable groove 5, one side of the fixed column 602 close to the inner wall of the fixed groove 7 contacts with the inner wall of the fixed groove 7, one side of the tension spring 603 close to the limiting block 601 and one side far away from the limiting block 601 respectively fixedly connect with the limiting block 601 and the inner wall of the movable groove 5, the bottom of the positioning plate 902 is fixedly connected with the inner wall of the rotating groove 8, one side of the adjusting rod 903 close to the positioning column 901 is provided with a seventh through hole 16 matched with the positioning column 901, one side of the positioning column 901 close to the inner wall of the seventh through hole 16 contacts with the inner wall of the seventh through hole 16, the front side and the rear side of the adjusting column 905 are fixedly connected with the inner wall of the second through hole 605, one side of the adjusting rod 903 close to the inner walls of the first through hole 12 and the second through hole 605 contacts with, one side of the limiting column 1102 close to the inner wall of the fifth through hole 14 is in contact with the inner wall of the fifth through hole 14, one side of the limiting rod 1103 close to the inner wall of the sixth through hole 15 is in contact with the inner wall of the sixth through hole 15, and the top and the bottom of the spring 1104 are fixedly connected with the inner wall of the limiting groove 10 and the top of the limiting plate 1101 respectively.

Adopt above-mentioned scheme: the fixing column 602 can be limited by arranging the limiting block 601, the fixing column 602 is prevented from being separated from the inner cavity of the movable groove 5, the supporting column 3 can be limited by arranging the fixing column 602 and the fixed groove 7, the limiting block 601 can be reset by arranging the tension spring 603, the adjusting rod 903 can be positioned by arranging the positioning plate 902, the fixing rod 604 can be rotated on the surface of the positioning column 901 by arranging the positioning column 901, the fixing rod 604 can be driven to move by arranging the adjusting column 905, the limiting column 1102 and the limiting rod 1103 can be limited by arranging the limiting plate 1101, the limiting column 1102 and the limiting rod 1103 can be prevented from being separated from the inner cavity of the limiting groove 10, the fixing rod 604 can be limited by arranging the limiting column 1102 and the clamping groove 606, and the position of the limiting plate 1101 can be adjusted by arranging the limiting rod 1103, by providing the spring 1104, the stopper plate 1101 can be returned.

The utility model discloses a theory of operation:

when in use, a user pulls the pull ring 1105, the pull ring 1105 listens to the limiting rod 1103 to drive the limiting plate 1101 to reversely slide in the inner cavity of the limiting groove 10 and extrude the spring 1104, so that the limiting column 1102 moves upwards, the user pulls the adjusting rod 903, the adjusting rod 903 rotates on the surface of the positioning column 901 and drives the fixing rod 604 to move through the adjusting column 905, the fixing rod 604 moves and simultaneously drives the limiting block 601 to slide in the inner cavity of the movable groove 5, so that the fixing column 602 is drawn out of the inner cavity of the positioning groove 4, the user loosens the pull ring 1105, the force released after the extrusion of the spring 1104 enables the limiting plate 1101 to reversely slide in the inner cavity of the limiting groove 10 and simultaneously drives the limiting column 1102 to downwards slide and enable the limiting column 1102 to enter the inner cavity of the clamping groove 606, the user places the funnel body 2 on the top of the batching device body 1, so that the supporting column 3 enters the inner cavity of the positioning groove 4, the user pulls the, after the limiting column 1102 is pulled out from the inner cavity of the clamping groove 606, the limiting block 601 slides reversely in the inner cavity of the movable groove 5 by the stretching and contracting force of the tension spring 603, and the fixed column 602 enters the inner cavity of the fixed groove 7, meanwhile, the fixed rod 604 drives the adjusting rod 903 to rotate reversely on the surface of the positioning column 901 through the adjusting column 905 and reset, the pull ring 1105 is loosened by a user, the force released after extrusion of the spring 1104 enables the limiting plate 1101 to slide reversely in the inner cavity of the limiting groove 10 and drive the limiting column 1102 to slide downwards and reset, fixing is completed, the pull ring 1105 is pulled by the user, the pull ring 1105 hears the limiting rod 1103 to drive the limiting plate 1101 to slide reversely in the inner cavity of the limiting groove 10 and extrude the spring 1104, the limiting column 1102 moves upwards, the adjusting rod 903 is pulled by the user, the adjusting rod 903 rotates on the surface of the positioning column 901 and drives the fixed rod 604 to move, the fixed column 602 is pulled out from the inner cavity of the fixed slot 7, the pull ring 1105 is loosened by a user, the force released after the extrusion of the spring 1104 enables the limiting plate 1101 to slide reversely in the inner cavity of the limiting slot 10 and drive the limiting column 1102 to slide downwards and enable the limiting column 1102 to enter the inner cavity of the clamping slot 606, the user takes the funnel body 2 down from the top of the batching device body 1, the user pulls the pull ring 1105 after the supporting column 3 is separated from the inner cavity of the positioning slot 4, the pull ring 1105 drives the limiting plate 1101 to slide reversely in the inner cavity of the limiting slot 10 through the limiting rod 1103 and extrudes the spring 1104, after the limiting column 1102 is pulled out from the inner cavity of the clamping slot 606, the force contracted after the stretching of the tension spring 603 enables the limiting block 601 to slide reversely in the inner cavity of the movable slot 5 and enables the fixed column 602 to reset, the fixed rod 604 drives the adjusting rod 903 to rotate, the force released after the spring 1104 extrudes makes the limiting plate 1101 slide reversely in the inner cavity of the limiting groove 10 and simultaneously drives the limiting post 1102 to slide downwards and reset, and the disassembly is completed.

In summary, the following steps: this full-automatic dosing unit is used in concrete production, through setting up dosing unit body 1, funnel body 2, support column 3, constant head tank 4, the movable chute 5, fixed establishment 6, fixed slot 7, rotating chute 8, adjustment mechanism 9, spacing groove 10, stop gear 11, first through-hole 12, fourth through-hole 13, fifth through-hole 14, the cooperation of sixth through-hole 15 and seventh through-hole 16 is used, it is not convenient for fix to have solved current funnel, a large amount of time and efforts of user can be wasted at fixed in-process, user's work efficiency has been reduced, the problem that the user used to the proportioning machine has been influenced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a full-automatic batching device is used in concrete production, includes dosing unit body (1), its characterized in that: the top of the batching device body (1) is provided with a funnel body (2), the front side and the rear side of the two sides of the funnel body (2) are both fixedly connected with supporting columns (3), the front side and the rear side of the two sides of the batching device body (1) are both provided with positioning grooves (4) matched with the supporting columns (3) for use, one side, opposite to the left side positioning grooves (4) and the right side positioning grooves (4), of each movable groove (5) is provided with a fixing mechanism (6), one side, close to the corresponding supporting columns (3), of each supporting column (3) is provided with a fixing groove (7) matched with the corresponding fixing mechanism (6) for use, the bottom of each movable groove (5) is provided with a rotating groove (8), the inner cavity of each rotating groove (8) is provided with an adjusting mechanism (9) matched with the corresponding fixing mechanism (6) for use, spacing groove (10) have been seted up to one side that constant head tank (4) were kept away from at activity groove (5) top, the inner chamber of spacing groove (10) is provided with stop gear (11) with fixed establishment (6) cooperation use, first through-hole (12) with adjustment mechanism (9) cooperation use are seted up at the top of activity groove (5).

2. The full-automatic batching device for concrete production according to claim 1, characterized in that: fixing mechanism (6) include stopper (601), stopper (601) are close to one side fixedly connected with fixed column (602) of constant head tank (4), the surface cover of fixed column (602) is equipped with extension spring (603), one side that stopper (601) were kept away from in fixed column (602) runs through dosing unit body (1) and extends to the inner chamber of fixed slot (7), one side fixedly connected with dead lever (604) of fixed column (602) are kept away from in stopper (601), second through-hole (605) that use with adjustment mechanism (9) cooperation are seted up at the top of dead lever (604), draw-in groove (606) that use with stop mechanism (11) cooperation are seted up to one side that stopper (601) were kept away from in dead lever (604) top.

3. The full-automatic batching device for concrete production according to claim 2, characterized in that: the adjusting mechanism (9) comprises a positioning column (901), positioning plates (902) are fixedly connected to the front side and the rear side of the positioning column (901), an adjusting rod (903) is sleeved on the surface of the positioning column (901), the top of the adjusting rod (903) penetrates through a second through hole (605) and a first through hole (12) in sequence and extends to the outer side of the batching device body (1), a third through hole (904) is formed in the front side of the adjusting rod (903), and an adjusting column (905) is arranged in an inner cavity of the third through hole (904).

4. The full-automatic batching device for concrete production according to claim 3, characterized in that: stop gear (11) include limiting plate (1101), the spacing post of bottom fixedly connected with (1102) of limiting plate (1101), the inner chamber that dosing unit body (1) and extend to activity groove (5) is run through to the bottom of spacing post (1102), the top fixedly connected with gag lever post (1103) of limiting plate (1101), the surface cover of gag lever post (1103) is equipped with spring (1104), the top of gag lever post (1103) runs through dosing unit body (1) and extends to the outside and the fixedly connected with pull ring (1105) of dosing unit body (1).

5. The full-automatic batching device for concrete production according to claim 4, characterized in that: one side that support column (3) are close to constant head tank (4) inner wall contacts with the inner wall of constant head tank (4), one side that dosing unit body (1) are close to fixed column (602) is seted up with fourth through-hole (13) that fixed column (602) cooperation was used, one side that dosing unit body (1) are close to spacing post (1102) and gag lever post (1103) is all seted up with spacing post (1102) and gag lever post (1103) cooperation use fifth through-hole (14) and sixth through-hole (15).

6. The full-automatic batching device for concrete production according to claim 5, characterized in that: one side of the limiting block (601), which is close to the inner wall of the movable groove (5), is in contact with the inner wall of the movable groove (5), one side of the fixed column (602), which is close to the inner wall of the fixed groove (7), is in contact with the inner wall of the fixed groove (7), one side of the tension spring (603), which is close to the limiting block (601), and one side of the tension spring, which is far away from the limiting block (601), are respectively and fixedly connected with the limiting block (601) and the inner wall of the movable groove (5), the bottom of the positioning plate (902) is fixedly connected with the inner wall of the rotating groove (8), one side of the adjusting rod (903), which is close to the positioning column (901), is provided with a seventh through hole (16) matched with the positioning column (901), one side of the positioning column (901), which is close to the inner wall of the seventh through hole (16), is in contact with the inner wall of the seventh through, one side of the adjusting rod (903) close to the inner walls of the first through hole (12) and the second through hole (605) is in contact with the inner walls of the first through hole (12) and the second through hole (605), one side of the limiting plate (1101) close to the inner wall of the limiting groove (10) is in contact with the inner wall of the limiting groove (10), one side of the limiting column (1102) close to the inner wall of the fifth through hole (14) is in contact with the inner wall of the fifth through hole (14), one side of the limiting rod (1103) close to the inner wall of the sixth through hole (15) is in contact with the inner wall of the sixth through hole (15), and the top and the bottom of the spring (1104) are respectively in fixed connection with the inner wall of the limiting groove (10) and the top of the limiting plate.

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