Flat laying machine

Abstract

The utility model discloses a tiling machine, and relates to the field of decoration equipment, the tiling machine comprises a machine shell, a suction cup seat, a suction cup, a suction cup pull rod, a vibration unit and a locking mechanism, and the locking mechanism comprises a grip, a limiting pin, a hook, a first torsion spring, a spring bolt and a second torsion spring; when the tiling machine needs to adsorb a workpiece, the connected suction cup pull rod is pulled upwards, the suction cup at the lower end is adsorbed to the workpiece, in the upward lifting process of the grip, the hook upwards crosses the limiting pin and then is hung on the limiting pin, so that the suction cup can keep a stable adsorption state with the workpiece, and a worker does not need to hold the grip tightly all the time; when unlocking is needed, the worker holds the lock tongue manually, so that the lock tongue overcomes the elastic force of the second torsional spring to rotate and pushes the hook down from the limiting pin, and then limiting of the grip and the suction cup are relieved, so that the workpiece is loosened.

Description

Technical Field

[0001] This application relates to the field of decoration equipment, and particularly to a tiling machine. Background Art

[0002] A tiling machine is a tool often used in decoration. Before the tiling machine appeared, when laying tiles, the ground needed to be leveled, and after laying the tiles, they had to be knocked flat with a hammer. To simplify the tile-laying process, a tiling machine dedicated to tile laying emerged.

[0003] In the prior art (such as a tiling machine disclosed in Patent Nos. CN211647192U and CN216428944U), the handle needs to be kept in a clenched state by the worker to adsorb the workpiece, which will cause a burden on the worker. At the same time, this type of tiling machine lacks a self-locking state, resulting in the tiling machine being easily separated from the tile and causing tile damage. Summary of the Utility Model

[0004] An embodiment of this application provides a tiling machine, which has a self-locking function, can maintain the adsorption state with the workpiece, and is convenient to use.

[0005] An embodiment of this application provides a tiling machine, which includes a machine shell, a suction cup seat, a suction cup, a suction cup pull rod, a vibration unit, and a locking mechanism; the locking mechanism includes a handle, a limit pin, a hook, a first torsion spring, a locking tongue, and a second torsion spring; one end of the handle is hinged to the suction cup seat, and the handle is movably connected to the suction cup pull rod; the limit pin is arranged on the machine shell; the hook is hinged to the handle, and the hook hooks the limit pin to limit the handle; the first torsion spring is arranged between the handle and the hook to make the hook tend to rotate towards the limit pin; the locking tongue is hinged to the handle, and the locking tongue and the hook are respectively located on the radial two sides of the limit pin, and the locking tongue is used to push the hook away from the limit pin; the second torsion spring is arranged between the handle and the locking tongue to make the locking tongue tend to rotate away from the limit pin.

[0006] The tiling machine of this application has at least the following beneficial effects:

[0007] The tiling machine of the present application includes a machine shell, a suction cup seat, suction cups, suction cup pull rods, a vibration unit, and a locking mechanism. The locking mechanism includes a grip, a limit pin, a hook, a first torsion spring, a lock tongue, and a second torsion spring. When the tiling machine of the present application needs to adsorb a workpiece, the operator tightly holds the grip, causing the suction cup pull rod connected to the grip to be pulled upward. As a result, the suction cups at the lower end are deformed and adsorb to the workpiece. During the upward movement of the grip, the hook moves upward over the limit pin and is then hooked on the limit pin. At this time, due to the cooperation of the hook and the limit pin, the grip and the suction cup pull rod cannot be reset downward, and the suction cups can thus maintain a stable adsorption state with the workpiece. There is no need for the worker to constantly hold the grip tightly, which can reduce the burden on the worker and at the same time reduce the problem of the tiling machine automatically detaching from the workpiece. When unlocking is required, the operator manually holds the lock tongue tightly, causing the lock tongue to rotate against the elastic force of the second torsion spring and push the hook away from the limit pin, thereby releasing the limit on the grip and allowing the suction cups to release the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0009] Figure 1 is a schematic structural diagram of the tiling machine of the present application;

[0010] Figure 2 is Figure 1 a structural diagram after hiding part of the machine shell;

[0011] Figure 3 is Figure 1 a schematic structural diagram of the suction cup seat in ;

[0012] Figure 4 is a vertical sectional view of the tiling machine of the present application;

[0013] Figure 5 is a structural diagram of the locking mechanism of the present application;

[0014] Figure 6 is a schematic diagram of the grip, suction cups, and suction cup pull rods in the present application;

[0015] Figure 7 is a process diagram of the hook lifting in the present application;

[0016] Figure 8 is a schematic structural diagram of the tiling machine in some other embodiments of the present application;

[0017] Figure 9 is Figure 8 a structural diagram of the detachable attachment sleeve in ;

[0018] Descriptions of the reference numerals are as follows:

[0019] 1. Housing; 1a. Guide inclined plane; 11. Cover body; 12. Handle;

[0020] 2. Suction cup seat; 21. Horn sleeve; 22. Concave mounting portion;

[0021] 3. Suction cup;

[0022] 4. Suction cup pull rod;

[0023] 5. Vibration unit;

[0024] 6. Locking mechanism; 61. Handle; 61a. Sliding groove; 611. Connecting seat; 612. Connecting pin; 62. Limit pin; 63. Hook; 631. Hook portion; 63a. First inclined plane; 63b. Second convex arc surface; 63c. Third concave arc surface; 64. First torsion spring; 65. Lock tongue; 651. First section of the lock tongue; 6511. Front convex portion; 6512. Fourth concave arc surface; 652. Second section of the lock tongue; 66. Second torsion spring; 67. First pin; 68. Second pin;

[0025] 7. Detachable attachment sleeve; 71. U-shaped sleeve; 72. Connecting sleeve;

[0026] 8. Battery assembly. Detailed implementation manners

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than limiting the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0028] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0029] This embodiment discloses a tile laying machine. The tile laying machine of this embodiment can be used to adsorb and carry tiles when laying tiles, and can also generate vibration, making the tiles more evenly stressed and easier to lay flat, effectively reducing the phenomenon of hollowing.

[0030] As Figure 1 and Figure 2 As shown, the tile laying machine of this embodiment includes a housing 1, a suction cup seat 2, a suction cup 3, a suction cup pull rod 4, a vibration unit 5 and a locking mechanism 6. The housing 1 is the covering part of the entire tile laying machine, and the housing 1 can also provide a hand-holding position for the operator. The suction cup seat 2 can provide an installation position for the suction cup 3 and the suction cup pull rod 4, facilitating the suction cup 3 to adsorb the workpiece (the workpiece is a tile or a plate-shaped object). The vibration unit 5 is used to generate rotation, which can effectively reduce the problem of hollowing during tile laying. The locking mechanism 6 is used to drive the suction cup pull rod 4 to move, and thus can control the suction cup 3 to adsorb and disengage from the workpiece. At the same time, the locking mechanism 6 also has a state-holding function, and can hold the adsorbed workpiece without the operator continuously gripping by hand.

[0031] As Figure 1 and Figure 2 As shown, the housing 1 includes a covering body 11 and a handle 12. The covering body 11 and the handle 12 are integrally formed. The covering body 11 is arranged above the suction cup seat 2, and the covering body 11 can cover at least part of the locking mechanism 6 to prevent the harsh external environment from affecting the operation of the locking mechanism 6. The handle 12 can provide a hand-holding position for the operator. In some embodiments, a battery assembly 8 is further arranged at one end of the handle 12 away from the covering body 11. The battery assembly 8 is electrically connected to the vibration unit 5 to supply power to the vibration unit 5.

[0032] As Figure 3As shown, a horn sleeve 21 is provided at the lower end of the suction cup seat 2. The large opening of the horn sleeve 21 faces away from the machine housing 1. The suction cup 3 is arranged on the horn sleeve 21. One end of the suction cup pull rod 4 is fixed to the back of the suction cup 3. The suction cup pull rod 4 slides upward through the suction cup seat 2. When the suction cup pull rod 4 slides up and down, it can drive the suction cup 3 to move, and enable the suction cup 3 to adsorb the workpiece or release the adsorption state with the workpiece. For the specific principle of how the suction cup 3 adsorbs the workpiece (ceramic tile), reference can be made to the prior art, which will not be elaborated here.

[0033] As Figure 2 and Figure 3 shown, the vibration unit 5 includes components such as a vibration motor that can generate vibration under the drive of electric energy. An inwardly concave mounting portion 22 is provided on the suction cup seat 2. The vibration unit 5 is fixedly arranged in the inwardly concave mounting portion 22. The covering body 11 of the machine housing 1 can cover at least part of the vibration unit 5 to prevent the external environment from affecting the operation of the vibration unit 5.

[0034] As Figure 4 and Figure 5 shown, the locking mechanism 6 includes a grip 61, a limit pin 62, a hook 63, a first torsion spring 64, a lock tongue 65, and a second torsion spring 66. The structure is introduced as follows:

[0035] As Figure 4 shown, one end of the grip 61 is hinged to the back of the suction cup seat 2. Figure 4 The label P in indicates the hinged position of the grip 61 and the back of the suction cup seat 2. The other end of the grip 61 extends to the outside of the covering body 11. One end of the grip 61 close to the suction cup seat 2 is movably connected to the upper end of the suction cup pull rod 4. Among them, the projections of the grip 61 and the handle 12 in the height direction at least partially overlap. When the staff tightly holds the grip 61 and the handle 12 at the same time, the grip 61 lifts the suction cup pull rod 4 upward, causing the lower suction cup 3 to deform and adsorb the workpiece.

[0036] There are two connection methods between the grip 61 and the suction cup pull rod 4:

[0037] The first one, as Figure 6 shown, a connection seat 611 is provided on the grip 61. The connection seat 611 and the suction cup seat 2 are hinged by a pin shaft. A sliding groove 61a is provided on the connection seat 611. The opening direction of the sliding groove 61a is the same as the axial direction of the suction cup pull rod 4. A connection pin 612 is fixedly arranged at the upper end of the suction cup pull rod 4. The two axial ends of the connection pin 612 are respectively arranged in the sliding groove 61a. Among them, the axial direction of the connection pin 612 is perpendicular to the axial direction of the suction cup pull rod 4. When the grip 61 is lifted upward, the inner bottom wall of the sliding groove 61a drives the connection pin 612 to move upward, thereby causing the suction cup pull rod 4 to be lifted upward. Among them, there is a clearance fit between the outer circumference of the connection pin 612 and the inner side wall of the sliding groove 61a, and the clearance fit can limit the connection pin 612 from horizontally shifting.

[0038] Second, the grip 61 and the sucker rod 4 are hinged by a pin shaft. The grip 61 can also drive the sucker rod 4 to lift upward by means of hinging with the pin shaft.

[0039] The limiting pin 62 is cylindrical in shape and is fixedly arranged in the covering body 11 of the machine housing 1. The axial direction of the limiting pin 62 is perpendicular to the axial direction of the sucker rod 4. The limiting pin 62 is used to cooperate with the hook 63 to limit the position of the grip 61, so that the paving machine maintains the state of adsorbing the workpiece.

[0040] As Figure 5 shown, the hook 63 is hinged to the grip 61 by a first pin 67, and the hook 63 is located in the covering body 11. A hook portion 631 is provided at the upper end of the hook 63, and the hook portion 631 can hook the limiting pin 62. The first torsion spring 64 is coaxially sleeved on the first pin 67, and both ends of the first torsion spring 64 are respectively abutted against the hook 63 and the grip 61. By applying an elastic force to the hook 63 by the first torsion spring 64, the hook 63 can rotate toward the limiting pin 62 with the first pin 67 as the rotation point. In this embodiment, the first torsion spring 64 has a tendency to make the hook 63 rotate toward the limiting pin 62. On the one hand, it can realize the active connection between the hook 63 and the limiting pin 62 at a predetermined position. On the other hand, it can keep the hook 63 and the limiting pin 62 stable after being connected.

[0041] As Figure 5 shown, a continuous surface capable of contacting the limiting pin 62 is provided on the hook portion 631 of the hook 63. The continuous surface includes a first inclined surface 63a, a second convex arc surface 63b, and a third concave arc surface 63c that are connected in sequence. When the hook 63 is lifted upward by the grip 61, the first inclined surface 63a, the second convex arc surface 63b, and the third concave arc surface 63c are sequentially in contact with the outer circumference of the limiting pin 62, and the third concave arc surface 63c can be hooked on at least a part of the outer peripheral surface of the limiting pin 62.

[0042] As Figure 5 and Figure 7 shown, Figure 7(A) in it schematically shows the state when the hook is disengaged from the limit pin, and (B) schematically shows the state when the hook is hooked to the limit pin. When the hook 63 is lifted upward, the first inclined surface 63a first contacts the outer circumference of the limit pin 62. As the hook 63 is continuously pushed upward, the hook 63 rotates clockwise with the first pin 67 as the rotation point. The setting of the first inclined surface 63a facilitates the hook portion 631 to cross over the limit pin 62. When the second outer convex arc surface 63b contacts the limit pin 62, it indicates that the hook portion 631 has reached the flush position with the limit pin 62. Then the hook 63 is continuously pushed upward by the grip 61, and the third inner concave arc surface 63c is buckled on at least a part of the outer circumference of the limit pin 62 under the action of the first torsion spring 64. At this time, the hook portion 631 and the limit pin 62 are in a hooked state, and the grip 61 cannot be reset downward.

[0043] As Figure 7 shown, the middle position of the locking tongue 65 is hinged to the grip 61 through the second pin 68. The locking tongue 65 is located on the side of the hook 63 away from the connecting seat 611. From the perspective in the horizontal direction, the locking tongue 65 and the hook 63 are respectively located on the radial two sides of the limit pin 62. The second torsion spring 66 is coaxially sleeved on the second pin 68, and the two ends of the second torsion spring 66 respectively abut against the grip 61 and the locking tongue 65. The second torsion spring 66 enables the locking tongue 65 to rotate with the second pin 68 as the rotation point and toward the direction away from the limit pin 62.

[0044] As Figure 7 shown, along the length direction of the locking tongue 65, the second pin 68 divides the locking tongue 65 into a first locking tongue section 651 and a second locking tongue section 652. The second locking tongue section 652 is located outside the covering body 11, which is convenient for the staff to operate on the second locking tongue section 652. As Figure 7 shown, a guiding inclined surface 1a is arranged inside the covering body 11 of the machine shell 1. The guiding inclined surface 1a is inclined relative to the horizontal plane, and the inclination angle is selected according to the actual situation (for example, 40 degrees to 70 degrees). In this embodiment, the guiding inclined surface 1a is inclined toward the limit pin 62. The back side of the first locking tongue section 651 can abut against the guiding inclined surface 1a under the action of the second torsion spring 66. When the grip 61 is lifted upward, the first locking tongue section 651 also moves upward. The guiding inclined surface 1a can guide the first locking tongue section 651 to slowly incline and gradually approach the hook portion 631 of the hook 63. When the hook 63 hooks the limit pin 62, the guiding inclined surface 1a just fits the back side of the first locking tongue section 651. At the same time, the first locking tongue section 651 and the first inclined surface 63a of the hook 63 are in a close state (the close state here can be that the distance is within the range of 1 mm to 5 mm). In this way, the external staff only needs to push the second locking tongue section 652 a small distance to make the first locking tongue section 651 contact the first inclined surface 63a and push the hook 63 away from the limit pin 62.

[0045] Please refer to again Figure 5, a front convex portion 6511 extending toward the hook 63 is provided on the first section 651 of the locking tongue. The front convex portion 6511 is used to push the hook 63 away from the limit pin 62. Among them, when the hook 63 and the limit pin 62 are in a hooked state, the front end face of the front convex portion 6511 is relatively parallel to the first inclined surface 63a of the hook 63, and the distance between the two is between 1 mm and 5 mm. When it is necessary to push the hook 63 away from the limit pin 62, the front end face of the front convex portion 6511 fits with the first inclined surface 63a, and pushes the hook 63 to rotate around the first pin 67 in the obliquely downward direction, so that the third concave arc surface 63c of the hook 63 is disengaged from the contact with the limit pin 62, and the handle 12 can then freely reset downward. In this embodiment, when pushing the hook 63 away, it is carried out through two surfaces that can fit with each other (that is, the front end face of the front end portion and the first inclined surface 63a of the hook 63). The contact area between the front convex portion 6511 and the hook 63 is relatively large, and the force stability is better.

[0046] Please refer to again Figure 5 , a fourth concave arc surface 6512 is further provided on the first section 651 of the locking tongue. When the first section 651 of the locking tongue pushes the hook 63 away from the limit pin 62, the fourth concave arc surface 6512 can be used to avoid the limit pin 62 and prevent interference between the first section 651 of the locking tongue and the limit pin 62.

[0047] In some embodiments, due to differences in the body types, genders, etc. of the staff, the finger lengths of the staff are different. Especially for some female staff, the finger lengths are relatively short (generally, the finger length difference is about 1 cm), resulting in the inability of these people's fingers to reach the grip 61, and thus they cannot hold the grip 61 and the handle 12 tightly with one hand at the same time.

[0048] In some embodiments, such as Figure 8 and Figure 9 shown, the paving machine further includes a detachable sleeve 7, which solves the problem that the fingers of some people cannot reach the grip 61. The detachable sleeve 7 includes a U-shaped sleeve 71 and a connecting sleeve 72. The U-shaped sleeve 71 is connected to the connecting sleeve 72. There are two connecting sleeves 72, and the two connecting sleeves 72 can be sleeved on the grip 61. The opening of the U-shaped sleeve 71 faces the locking tongue 65, and the U-shaped sleeve 71 is located on the upper surface of the grip 61. The fingers of the staff can hold the handle 12 of the machine case 1 and pass through the U-shaped sleeve 71, so as to hold the grip 61 and the handle 12 tightly with each other. In this embodiment, the defect of relatively short fingers is made up by setting the U-shaped sleeve 71, and the opening of the U-shaped sleeve 71 faces the locking tongue 65, which is convenient for the staff to move the fingers out of the opening of the U-shaped sleeve 71 and operate the second section 652 of the locking tongue, so as to release the adsorption state of the paving machine.

[0049] In some embodiments, the connecting sleeve 72 is made of an elastic material (such as rubber, sponge, etc.). Selecting the connecting sleeve 72 to be made of an elastic material facilitates sleeving it on the grip 61 and tightly wrapping around the grip 61. When the U-shaped sleeve 71 is not needed, the connecting sleeve 72 can also be quickly disassembled and the connecting sleeve 72 and the U-shaped sleeve 71 can be removed together.

[0050] A working method of the paving machine in this embodiment is as follows:

[0051] 1. The operator holds the handle 12 of the machine housing 1 with the hand and hooks the fingers on the grip 61, then places the paving machine on the surface of the workpiece, and lifts the grip 61 with the fingers. The sucker pull rod 4 is lifted upward by the grip 61, so that the sucker 3 adsorbs on the surface of the workpiece.

[0052] 2. During the process of the grip 61 being lifted upward, the hook part 631 at the upper end of the hook 63 passes over the limit pin 62 and then hooks on the outer circumference of the limit pin 62, so that the grip 61 cannot be reset downward, and the sucker 3 can thus maintain the adsorption state with the workpiece.

[0053] 3. The operator holds the paving machine and drives the workpiece to the predetermined installation position, and then turns on the vibration unit 5. The workpiece is driven by the vibration unit 5 to generate slight vibrations at the installation position to achieve efficient installation.

[0054] 4. After the workpiece is installed, the operator's finger toggles the lock tongue 65, so that the lock tongue 65 rotates forward and pushes the hook part 631 of the hook 63 away from the limit pin 62. The handle 12 can then be reset downward, and the sucker pull rod 4 is also reset immediately, and the sucker 3 thus releases the adsorption state with the workpiece.

[0055] The above is only the specific implementation manner of the present application. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, modules, and units can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and these modifications or substitutions should all be covered within the protection scope of the present application.

Claims

1. A paving machine, comprising a housing (1), a suction cup seat (2), a suction cup (3), a suction cup pull rod (4) and a vibration unit (5), characterized in that: The paving machine further comprises a locking mechanism (6); the locking mechanism (6) comprises a handle (61), a limit pin (62), a hook (63), a first torsion spring (64), a locking tongue (65) and a second torsion spring (66); One end of the handle (61) is hinged on the suction cup seat (2), and the handle (61) is movably connected to the suction cup pull rod (4); The limiting pin (62) is arranged on the housing (1); The hook (63) is hinged on the handle (61), and the handle (61) is limited by hooking the limit pin (62) through the hook (63); The first torsion spring (64) is arranged between the handle (61) and the hook (63), so that the hook (63) has a tendency to rotate toward the limiting pin (62); The locking tongue (65) is hinged on the handle (61), and the locking tongue (65) and the hook (63) are respectively located on two radial sides of the limiting pin (62), and the locking tongue (65) is used to push the hook (63) to separate from the limiting pin (62); The second torsion spring (66) is arranged between the handle (61) and the locking tongue (65), so that the locking tongue (65) has a tendency to rotate away from the limiting pin (62).

2. The paving machine according to claim 1, characterized in that: The hook (63) is provided with a continuous surface capable of contacting the limiting pin (62), and the continuous surface comprises a first inclined surface (63a), a second convex arc surface (63b) and a third concave arc surface (63c) which are connected in sequence.

3. The paving machine according to claim 2, characterized in that: The third inner concave arc surface (63c) can be hooked onto at least a portion of the outer peripheral surface of the limiting pin (62).

4. The paving machine according to claim 1, characterized in that: The housing (1) is provided with a guide slope (1a), and the locking tongue (65) abuts against the guide slope (1a). When the handle (61) is lifted, the locking tongue (65) gradually approaches the hook (63) along the guide slope (1a).

5. The paving machine according to claim 4, characterized in that: The locking tongue (65) is provided with a front protrusion (6511) extending toward the hook (63), and the front protrusion (6511) is used to push the hook (63).

6. The paving machine according to claim 5, characterized in that: The locking tongue (65) is further provided with a fourth inner concave arc surface (6512), and the fourth inner concave arc surface (6512) is used to avoid the limiting pin (62).

7. The paving machine according to any one of claims 1 to 6, characterized in that: The invention also comprises a detachable attachment sleeve (7), wherein the detachable attachment sleeve (7) comprises a U-shaped sleeve (71) and a connecting sleeve (72), wherein the U-shaped sleeve (71) is connected to the connecting sleeve (72), the U-shaped sleeve (71) is used to connect to the finger of an external staff member, and the connecting sleeve (72) is sleeved on the handle (61).

8. The paving machine according to claim 7, characterized in that: The connecting sleeve (72) is made of elastic material.

9. The paving machine according to claim 1, characterized in that: The suction cup seat (2) is arranged on the housing (1); the suction cup (3) is arranged on the suction cup seat (2); the suction cup pull rod (4) is connected to the suction cup (3) and the suction cup pull rod (4) is slidably arranged through the suction cup seat (2); the handle (61) is movably connected to the suction cup pull rod (4), and the suction cup pull rod (4) is driven to move by the handle (61) so that the suction cup (3) is adsorbed on the workpiece; the vibration unit (5) is arranged on the suction cup seat (2) and is used to generate vibration.

10. The paving machine according to claim 9, characterized in that: The handle (61) is provided with a sliding groove (61a) opened along the axial direction of the suction cup pull rod (4), and the suction cup pull rod (4) is provided with a connecting pin (612) perpendicular to its axial direction, one end of the connecting pin (612) is arranged in the sliding groove (61a), and the connecting pin (612) and the sliding groove (61a) are clearance-matched.

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