A steel ball automatic feeding mechanism and assembling device for new energy automobile parts

Abstract

The application relates to the technical field of new energy automobile part assembling tooling, and provides a steel ball automatic feeding mechanism and an assembling device for new energy automobile parts, which comprises a main block provided with a storage channel in the main block; a distribution sheet movably inserted in the main block and separating the storage channel into a storage area and a dropping area, the distribution sheet being provided with a through portion and a stop portion; a pushing channel provided in the main block and communicating with the side walls of the main block at both ends, the pushing channel being located at the end of the storage channel and being crossly arranged with the storage channel; and a pushing rod movably inserted in the pushing channel and synchronously moving with the distribution sheet. Compared with the prior art, the application mainly realizes the automatic layering of the steel balls in the storage channel and the automatic feeding of the steel balls through the distribution sheet arranged in the main block and the pushing rod synchronously moving with the distribution sheet, so that the assembling efficiency of the steel balls is finally accelerated, and the assembling cost of the steel balls is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy automobile parts assembly tooling, in particular to a steel ball automatic feeding mechanism and assembly device for new energy automobile parts. BACKGROUND

[0002] In the automobile parts, especially the new energy automobile shell, one or more steel balls need to be installed. The traditional installation process mostly adopts manual installation, or manually places a single steel ball on the workpiece, and then presses the steel ball into the workpiece through a pressing device. These two installation methods have low installation efficiency and high manufacturing cost of the workpiece. SUMMARY

[0003] The present application relates to the technical field of new energy automobile parts assembly tooling, in particular to a steel ball automatic feeding mechanism and assembly device for new energy automobile parts.

[0004] The technical scheme adopted by the present application to solve the above technical problem is to provide a steel ball automatic feeding mechanism for new energy automobile parts, comprising: a main block having a storage channel arranged in the main block, the storage channel being used for placing the steel balls to be assembled;

[0005] A distribution piece is movably inserted into the main block and separates the storage channel into a storage area and a dropping area. The length of the dropping area is 1-1.2 times the diameter of the steel ball. The distribution piece has a through portion and a stop portion. The through portion or the stop portion is overlapped with the storage channel when the distribution piece moves;

[0006] A pushing channel is arranged in the main block and communicates with the side wall of the main block at both ends. The pushing channel is located at the end of the storage channel and is arranged crosswise with the storage channel;

[0007] A pushing rod is movably inserted into the pushing channel and moves synchronously with the distribution piece;

[0008] When the through portion of the distribution piece is overlapped with the storage channel, the storage area and the dropping area are communicated, the pushing rod isolates the dropping area and the pushing channel, and the steel balls in the storage channel fall into the dropping area one by one. When the stop portion of the distribution piece is overlapped with the storage channel, the distribution piece isolates the storage area and the dropping area, the steel balls cannot fall from the storage area into the dropping area, the front end of the pushing rod is located at the rear part of the pushing channel, the dropping area is communicated with the pushing channel, and the steel balls in the dropping area move into the pushing channel.

[0009] The distribution sheet is a thin plate structure, the through hole is a through hole penetrating the thickness direction of the distribution sheet, and the through hole and the side wall of the distribution sheet are circularly arc transition and the hole wall of the through hole is arc-shaped.

[0010] The through hole is a runway type, and the width of the through hole is greater than the diameter of the steel ball.

[0011] The steel ball automatic feeding mechanism further comprises a first driving member, and the pushing rod is connected to the output end of the first driving member.

[0012] A protection block is connected to the front end of the first driving member and detachably connected with the main body block, a hollow cavity is formed in the protection block, and the distribution sheet and the rear end of the pushing rod are movably arranged in the cavity.

[0013] A connecting member is movably connected in the cavity, a connecting groove is arranged on the distribution sheet, the upper end of the connecting member is inserted into the connecting groove, a connecting hole is arranged on the lower part of the connecting member, the connecting hole is sleeved on the outer side wall of the pushing rod, and the side wall of the connecting hole is tightly abutted against the outer side wall of the pushing rod.

[0014] The steel ball automatic feeding mechanism further comprises a first driving member, and the pushing rod is connected to the output end of the first driving member.

[0015] The upper end of the main body block extends towards the inside of the main body block to form a counterbore in communication with the storage channel, and a barrel is inserted into the counterbore.

[0016] The steel ball automatic feeding mechanism further comprises:

[0017] A first fixed frame;

[0018] A second driving member is fixed to the upper end of the first fixed frame;

[0019] A moving block is connected to the output end of the second driving member, and one side of the main body block is connected to the moving block.

[0020] The steel ball automatic feeding mechanism further comprises a first driving member, and the pushing rod is connected to the output end of the first driving member.

[0021] A second fixed frame;

[0022] A third driving member is connected above the second fixing frame;

[0023] A pressure sensor is connected at the output end of the third driving member;

[0024] A steel ball taking member is movably connected to the second fixing frame and the pressure sensor, and is used for installing a steel ball into a workpiece.

[0025] In the above-mentioned steel ball automatic assembling device for new energy automobile parts, the steel ball taking member comprises:

[0026] A moving member;

[0027] A fixing member is connected to the moving member;

[0028] A material suction rod is connected to the end of the fixing member away from the moving member, the material suction rod is internally provided with a gas passage, the side wall of the material suction rod is provided with an air inlet hole in communication with the gas passage, and the gas passage is in communication with the end of the material suction rod away from the fixing member;

[0029] A material suction sleeve is sleeved at the front end of the material suction rod, the material suction rod is provided with a guide groove, the material suction sleeve is provided with a guide column, the material suction sleeve is sleeved at the front end of the material suction rod, and the guide column is movably arranged in the guide groove;

[0030] An elastic member is sleeved at the outer side wall of the material suction rod, and the two ends of the elastic member are respectively abutted between the material suction rod and the material suction sleeve.

[0031] Compared with the prior art, the present application mainly has the following advantages:

[0032] (1) The material distribution piece in the main body block and the material pushing rod moving synchronously with the material distribution piece are used for realizing automatic layering of the steel balls in the storage channel and automatic feeding of the steel balls, thereby finally speeding up the assembling efficiency of the steel balls and reducing the assembling cost of the steel balls;

[0033] (2) The circular arc transition between the through hole in the material distribution piece and the material distribution piece is used for facilitating the steel balls to fall from the storage area into the material falling area;

[0034] (3) The setting of the material cylinder is used for increasing the loading capacity of the steel balls in the main body block, reducing the number of times of carrying the steel balls, and increasing the feeding efficiency of the steel balls. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a perspective view of the automatic assembling device of the present application;

[0036] Figure 2is a perspective view of the automatic feeding mechanism of the present application;

[0037] Figure 3 is Figure 2 is a plan view of part of the structure;

[0038] Figure 4 is Figure 3 is a sectional view along A-A in

[0039] Figure 5 is a perspective view of the installation of the distribution piece, the pushing rod and the connecting piece;

[0040] Figure 6 is a perspective view of the main block;

[0041] Figure 7 is Figure 1 is a perspective view of the main block in

[0042] Figure 8 is Figure 7 is a sectional view along B-B in

[0043] In the figure, 1 is the main block; 2 is the storage channel; 3 is the distribution piece; 4 is the storage area; 5 is the material dropping area; 6 is the through part; 7 is the stop part; 8 is the pushing channel; 9 is the pushing rod; 10 is the first driving piece; 11 is the protection block; 12 is the connecting piece; 13 is the connecting groove; 14 is the fixed channel; 15 is the fixed sleeve; 16 is the blocking block; 17 is the material cylinder; 18 is the first fixed frame; 19 is the second driving piece; 20 is the moving block; 21 is the second fixed frame; 22 is the third driving piece; 23 is the pressure sensor; 24 is the steel ball taking piece; 25 is the moving piece; 26 is the fixed piece; 27 is the material sucking rod; 28 is the air inlet hole; 29 is the material sucking sleeve; 30 is the guide groove; 31 is the guide column; 32 is the elastic piece; 33 is the workpiece; 34 is the steel ball. DETAILED DESCRIPTION

[0044] The following is a specific embodiment of the present application and further describes the technical solution of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0045] As Figures 1 to 8As shown, the automatic steel ball feeding mechanism for new energy automobile parts of the present application comprises a main block 1, a storage channel 2 provided in the main block 1, the storage channel 2 is used for placing the steel balls 34 to be assembled, a distribution piece 3 movably inserted in the main block 1 and separating the storage channel 2 into a storage area 4 and a falling area 5, the length of the falling area 5 is 1-1.2 times the diameter of the steel ball 34, the distribution piece 3 has a through part 6 and a stop part 7, and the through part 6 or the stop part 7 overlaps the storage channel 2 when the distribution piece 3 moves, a pushing channel 8 provided in the main block 1 and communicating with the side wall of the main block 1 at both ends, the pushing channel 8 is located at the end of the storage channel 2 and is crossly arranged with the storage channel 2, a pushing rod 9 movably inserted in the pushing channel 8 and moving synchronously with the distribution piece 3, when the through part 6 of the distribution piece 3 overlaps the storage channel 2, the storage area 4 and the falling area 5 are communicated, the pushing rod 9 isolates the falling area 5 and the pushing channel 8, and the steel ball 34 in the storage channel 2 falls into the falling area 5 one by one, when the stop part 7 of the distribution piece 3 overlaps the storage channel 2, the distribution piece 3 isolates the storage area 4 and the falling area 5, the steel ball 34 cannot fall from the storage area 4 into the falling area 5, and the front end of the pushing rod 9 is located at the rear part of the pushing channel 8 to make the falling area 5 communicate with the pushing channel 8, and the steel ball 34 in the falling area 5 moves into the pushing channel 8.

[0046] The storage channel 2 in the main block 1 can be perpendicular to the height direction of the main block 1 as shown, can be obliquely arranged in the main block 1, can be arranged in the main block 1 in the way of oblique and vertical, and can be arranged in the main block 1 in the way of arc.

[0047] The length of the falling area 5 is set to be 1-1.2 times the diameter of the steel ball 34, so that only one steel ball 34 enters the falling area 5 when the through part 6 overlaps the storage channel 2 and the storage area 4 and the falling area 5 are communicated, so that the distribution piece 3 can isolate other steel balls 34 above the steel ball 34 stored in the falling area 5 in the storage area 4 when the distribution piece 3 moves to the stop part 7 and overlaps the storage channel 2, and the storage area 4 and the falling area 5 are separated, and the pushing rod 9 also exits the intersection of the falling area 5 and the pushing channel 8 when the distribution piece 3 moves to the stop part 7 and overlaps the storage channel 2, so that the steel ball 34 in the falling area 5 can fall into the pushing channel 8 under the influence of its own gravity, and the pushing rod 9 can also push the steel ball 34 falling into the pushing channel 8 out of the main block 1 when the distribution piece 3 moves to the through part 6 and overlaps the storage channel 2 for the second time, thereby completing the automatic separation and feeding of the steel ball 34, and finally improving the assembly efficiency of the steel ball 34 and reducing the assembly cost of the steel ball 34.

[0048] Further, the distribution piece 3 is a thin plate structure, the through part 6 is a through hole penetrating the thickness direction of the distribution piece 3, and the through hole and the side wall of the distribution piece 3 are circularly arc transition and the hole wall of the through hole is arc-shaped.

[0049] The main function of the distribution sheet 3 is to layer the steel balls 34 stacked in the storage channel 2, and the distribution sheet 3 is inserted in the main block 1, so the thicker the thickness of the distribution sheet 3, the more space it occupies in the main block 1, and the less the number of steel balls 34 placed in the main block 1, and the thin plate structure of the distribution sheet 3 can reduce the volume of the main block 1, so that the main block 1 can store more steel balls 34. The through hole and the distribution sheet 3 are arranged as a circular arc transition, which can provide a gentle slope for the steel balls 34 to fall from the storage area 4 to the dropping area 5 during the movement of the distribution sheet 3, preventing the steel balls 34 from entering the dropping area 5 due to the stacking of the steel balls 34 in the storage area 4, and the side wall of the through hole is arranged as an arc shape, which can make the steel balls 34 more easily pass through the through hole 6.

[0050] Further, the through hole is a racetrack type, and the width of the through hole is greater than the diameter of the steel ball 34. The through hole is arranged as a racetrack type and the width of the through hole is greater than the diameter of the steel ball 34, which is beneficial for the steel ball 34 to fall from the storage area 4 to the dropping area 5.

[0051] Further, the scheme further comprises: a first driving member 10, the pushing rod 9 is connected to the output end of the first driving member 10; a protection block 11 connected to the front end of the first driving member 10 and detachably connected with the main block 1, the protection block 11 forms a hollow cavity chamber, the distribution sheet 3 and the rear end of the pushing rod 9 are movably arranged in the cavity chamber; a connecting piece 12 movably connected in the cavity chamber, the distribution sheet 3 is provided with a connecting groove 13, the upper end of the connecting piece 12 is inserted into the connecting groove 13, the lower part of the connecting piece 12 is provided with a connecting hole, the connecting hole is sleeved on the outer side wall of the pushing rod 9, and the side wall of the connecting hole is tightly contacted with the outer side wall of the pushing rod 9.

[0052] The first driving member 10 is used to provide power for the movement of the pushing rod 9 and the distribution sheet 3, the protection block 11 is used to ensure that the movement of the pushing rod 9 and the distribution sheet 3 is not affected by the external environment, the connecting hole on the connecting piece 12 and the connecting groove 13 on the distribution sheet 3 are used to realize the synchronous movement between the distribution sheet 3 and the pushing rod 9, and the detachable connection between the protection block 11 and the main block 1 can be realized by screw connection.

[0053] Further, the main block 1 is provided with a solid material channel 14, the upper end of the solid material channel 14 is communicated with the pushing material channel 8, a fixed sleeve 15 is inserted in the solid material channel 14, and a blocking block 16 is movably arranged at the upper end of the fixed sleeve 15.

[0054] When the first driving member 10 drives the pushing rod 9 to exit the intersection of the pushing channel 8 and the blanking area 5, the steel ball 34 enters the pushing channel 8 from the blanking area 5, and due to the fact that the two ends of the pushing channel 8 are communicated with the main block 1, the steel ball 34 will be pushed out of the main block 1 under the action of inertia, and the fixed channel 14, the fixed sleeve 15 arranged in the fixed channel 14 and the blocking block 16 movably connected with the fixed sleeve 15 can prevent the steel ball 34 from falling out of the main block 1, and due to the fact that the blocking block 16 is movably connected with the fixed sleeve 15, when the pushing rod 9 pushes the steel ball 34 to move, the blocking block 16 will also enter the fixed sleeve 15 due to the pushing of the steel ball 34 to make way for the feeding of the steel ball 34.

[0055] Preferably, a spring is arranged in the fixed sleeve 15, one end of the spring is connected with the blocking block 16, and the other end of the spring abuts against the fixed sleeve 15, so that the movable connection between the blocking block 16 and the fixed sleeve 15 is realized.

[0056] Preferably, the blocking block 16 is spherical, so that the friction between the blocking block 16 and the steel ball 34 is reduced, and the steel ball 34 moves more smoothly when being pushed by the pushing rod 9.

[0057] Further, the upper end of the main block 1 extends towards the inside of the main block 1 to form a counterbore communicated with the storage channel 2, and a barrel 17 is arranged in the counterbore.

[0058] The barrel 17 is used for increasing the loading amount of the steel ball 34 on the main block 1, reducing the number of times of carrying the steel ball 34 and increasing the working efficiency of assembling the steel ball 34.

[0059] Further, the scheme further comprises: a first fixed frame 18; a second driving member 19 fixed at the upper end of the first fixed frame 18; a moving block 20 connected with the output end of the second driving member 19, and one side of the main block 1 is connected with the moving block 20.

[0060] The first fixed frame 18 is used for supporting the whole automatic feeding mechanism, the second driving member 19 and the moving block 20 connected with the output end of the second driving member 19 and connected with the main block 1 are used for realizing the horizontal movement of the main block 1, and then the horizontal transfer of the steel ball 34 is completed.

[0061] The application discloses an automatic assembling device for steel balls 34 of new energy automobile parts, which comprises the automatic feeding mechanism and further comprises a second fixed frame 21; a third driving member 22 connected above the second fixed frame 21; a pressure sensor 23 connected with the output end of the third driving member 22; and a steel ball taking member 24 movably connected with the second fixed frame 21 and fixed on the pressure sensor 23, and the steel ball taking member 24 is used for installing the steel ball 34 into the workpiece 33.

[0062] The second fixing frame 21 is used for supporting the third driving member 22 and the steel ball taking member 24. After the second driving member 19 moves the main body block 1 to the state that the pushing channel 8 is collinear with the axis direction of the steel ball taking member 24, the first driving member 10 drives the pushing rod 9 to push the steel ball 34 in the pushing channel 8 into the steel ball taking member 24, and then the second driving member 19 drives the main body block 1 to reset. After the main body block 1 is reset, the third driving member 22 drives the steel ball taking member 24 to approach the workpiece 33 and install the steel ball 34 on the steel ball taking member 24 into the workpiece 33. The pressure sensor 23 is used for sensing the pressure between the steel ball taking member 24 and the workpiece 33, so as to prevent the output pressure of the third driving member 22 from being too large and the depth of the steel ball 34 installed into the workpiece 33 from being deviated.

[0063] Further, the steel ball taking member 24 comprises a moving member 25, a fixing member 26 connected to the moving member 25, a suction rod 27 connected to one end of the fixing member 26 away from the moving member 25, a gas passage arranged in the suction rod 27, an air inlet hole 28 arranged on the side wall of the suction rod 27 and communicated with the gas passage, the gas passage being communicated with the other end of the suction rod 27 away from the fixing member 26, a suction sleeve 29 sleeved on the front end of the suction rod 27, a guide groove 30 arranged on the suction rod 27, a guide column 31 inserted on the suction sleeve 29 and movably arranged in the guide groove 30, and an elastic member 32 sleeved on the outer side wall of the suction rod 27 and abutting against the suction sleeve 29 and the suction rod 27.

[0064] After the first driving member 10 drives the pushing rod 9 to push the steel ball 34 out of the pushing channel 8, the steel ball 34 enters the suction sleeve 29, and then the second driving member 19 drives the main body block 1 to reset. After the main body block 1 is reset, the third driving member 22 drives the moving member 25 to move on the second fixing frame 21 by driving the pressure sensor 23 to move. When the moving member 25 moves, the fixing member 26 connected to the moving member 25 drives the suction rod 27 to move. When the suction rod 27 moves, the suction sleeve 29 first contacts the side wall of the workpiece 33, and then the suction rod 27 continues to move and pushes the steel ball 34 in the suction sleeve 29 to be installed into the workpiece 33. The air inlet hole 28 arranged on the side wall of the suction rod 27 is used for connecting the gas source to form negative pressure at the front end of the suction rod 27 through the gas source and the gas passage, so as to adsorb the steel ball 34 after the steel ball 34 enters the suction sleeve 29 and prevent the steel ball 34 from falling out of the suction sleeve 29. The guide groove 30 and the guide column 31 are arranged to guide the movement of the suction sleeve 29 while connecting the suction sleeve 29 and the suction rod 27. The elastic member 32 is used for resetting the suction sleeve 29.

[0065] It should be noted that the first driving member 10, the second driving member 19 and the third driving member 22 can be cylinders, motors, electromagnets or other power mechanisms. The elastic member 32 can be a spring or a rubber product.

[0066] It should be noted that all directional indications, such as upper, lower, left, right, front, back, under, above, upward, downward, etc., are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0067] In addition, the descriptions such as "first", "second", "one", etc. in the present application are only for descriptive purposes, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0068] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing", etc. should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0070] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the scope defined by the spirit of the present application.

Claims

1. A steel ball automatic assembling device for new energy automobile parts, characterized in that, The application relates to a steel ball feeding device, which comprises the following parts: a main block, which is provided with a storage channel arranged in the main block, the storage channel being used for placing the steel balls to be assembled; a distribution piece, which is movably arranged in the main block and separates the storage channel into a storage area and a dropping area, the length of the dropping area being 1-1.2 times the diameter of the steel ball, the distribution piece being provided with a through part and a stop part, and the through part or the stop part being overlapped with the storage channel when the distribution piece moves; a pushing channel, which is arranged in the main block and communicates with the side wall of the main block at both ends, the pushing channel being arranged at the end of the storage channel and intersecting the storage channel; a pushing rod, which is movably arranged in the pushing channel and moves synchronously with the distribution piece; when the through part of the distribution piece is overlapped with the storage channel, the storage area communicates with the dropping area, the pushing rod isolates the dropping area from the pushing channel, and the single steel ball in the storage channel falls into the dropping area; when the stop part of the distribution piece is overlapped with the storage channel, the distribution piece isolates the storage area from the dropping area, the steel ball cannot fall into the dropping area from the storage area, the front end of the pushing rod is located at the rear part of the pushing channel, the dropping area communicates with the pushing channel, and the steel ball in the dropping area moves into the pushing channel; the distribution piece is a thin plate structure, the through part is a through hole penetrating through the thickness direction of the distribution piece, the through hole and the side wall of the distribution piece are circularly arc transitioned, and the hole wall of the through hole is arc-shaped; the through hole is a racetrack type, and the width of the through hole is larger than the diameter of the steel ball; a second fixing frame; a third driving member connected above the second fixing frame; a pressure sensor connected at the output end of the third driving member; a steel ball taking member movably connected on the second fixing frame and fixed on the pressure sensor, the steel ball taking member being used for installing the steel ball into a workpiece.

2. The automatic assembling device for steel balls of new energy automobile parts according to claim 1, characterized in that, Further comprising: a first driving member, the pushing rod being connected at the output end of the first driving member; a protection block connected at the front end of the first driving member and detachably connected with the main block, a hollow cavity being formed in the protection block, the distribution piece and the rear end of the pushing rod being movably arranged in the cavity; a connecting member movably connected in the cavity, a connecting groove being arranged on the distribution piece, the upper end of the connecting member being inserted into the connecting groove, a connecting hole being arranged on the lower part of the connecting member, the connecting hole being sleeved on the outer side wall of the pushing rod, and the side wall of the connecting hole being tightly abutted against the outer side wall of the pushing rod.

3. The automatic assembling device for steel balls of new energy automobile parts according to claim 1, characterized in that, A solid material channel is arranged in the main block, the upper end of the solid material channel communicating with the pushing channel, a fixing sleeve being movably arranged in the solid material channel, and a blocking block being movably arranged at the upper end of the fixing sleeve.

4. The automatic assembling device for steel balls of new energy automobile parts according to claim 1, characterized in that, The upper end of the main block extends towards the inside of the main block to form a counterbore communicating with the storage channel, and a barrel is movably arranged in the counterbore.

5. The automatic assembling device for steel balls of new energy automobile parts according to claim 1, characterized in that, Further comprising: a first fixing frame; a second driving member fixed at the upper end of the first fixing frame; A moving block is connected to the output end of the second driving member, and one side of the main body block is connected to the moving block.

6. The automatic assembling device for steel balls of new energy automobile parts according to claim 1, characterized in that, The steel ball taking member comprises: A moving member; A fixing member connected to the moving member; A suction rod connected to the end of the fixing member away from the moving member, wherein the suction rod is internally provided with a gas passage, the side wall of the suction rod is provided with an air inlet hole in communication with the gas passage, and the gas passage is in communication with the end of the suction rod away from the fixing member; A suction sleeve sleeved on the front end of the suction rod, wherein the suction rod is provided with a guide slot, and the suction sleeve is provided with a guide column inserted therein, and the guide column is movably arranged in the guide slot; An elastic member sleeved on the outer side wall of the suction rod, wherein the two ends of the elastic member are respectively abutted between the suction rod and the suction sleeve.

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