Elastic sucker rod and clamp

Abstract

The utility model relates to the technical field of clamping devices, and discloses an elastic suction cup rod and a clamp, the elastic suction cup rod comprises a sleeve, a connecting rod and an elastic piece, a through hole is formed in the sleeve in the first direction, the connecting rod is arranged in the through hole in a sliding mode in the first direction, and the elastic piece is arranged on the connecting rod. The first end of the connecting rod extends towards the outside of the second end of the sleeve so as to be connected with the suction cup, and a limiting part is arranged in the through hole so as to prevent the connecting rod from being separated from the through hole; the elastic piece is located in the through hole and used for being matched with the connecting rod so as to provide elastic force for the connecting rod when the connecting rod slides in the first direction. The clamp comprises a plurality of suction cups, and the suction cups are connected with the clamp mounting plate through elastic suction cup rods, so that the multi-station clamp is formed. The clamp can adapt to the relative distance between the carton and the suction cup, and one-time grabbing of carton faces with random stacking is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping devices, in particular to an elastic suction cup rod and a clamp. Background Art

[0002] In existing technology, the suction cup is connected to the mounting surface via a rigid clamp. The distance between the clamp station and the mounting surface is fixed, and the distance between the suction cup and the mounting surface is also fixed. Rigid clamps lack flexibility. When handling cartons placed skewed in a container, the robot must repeatedly adjust the clamp station to ensure the suction cup securely grasps the cartons, impacting unloading efficiency. Utility Model Content

[0003] The purpose of the utility model is to provide an elastic suction cup rod to solve the problem in the above-mentioned background technology that the rigid clamp has poor flexibility and affects the suction cup grasping effect.

[0004] Another object of the present invention is to provide a clamp using an elastic suction cup rod.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An elastic suction cup rod, comprising:

[0007] A sleeve having a first end and a second end, wherein the first end of the sleeve is used to connect to the fixture mounting plate, and the second end of the sleeve is close to the suction cup; a through hole is defined in the sleeve along a first direction, and the open end of the through hole is in communication with the end surface of the second end of the sleeve, wherein the first direction is the axial direction of the sleeve;

[0008] a connecting rod slidably disposed in the through hole along a first direction, the first end of the connecting rod extending toward the exterior of the second end of the sleeve so that, after the first end of the connecting rod is connected to the suction cup, a first gap is formed between the suction cup and an end surface of the second end of the sleeve, and a limiting portion is provided in the through hole to prevent the connecting rod from falling out of the through hole;

[0009] An elastic member, located within the through-hole, cooperates with the connecting rod to provide an elastic force when the connecting rod slides in the first direction. This arrangement provides cushioning and resetting capabilities during sliding of the connecting rod, increasing the flexibility of the mechanism. When the connecting rod slides in the first direction, it drives the suction cup, improving its flexibility and effectively addressing situations where cartons are stacked skewed or have different distances between carton surfaces.

[0010] Furthermore, a fixing plate is provided on the outer periphery of the first end of the sleeve, and a bolt hole is provided on the fixing plate so that the sleeve can be fixed to the fixture mounting plate by bolts. Through this arrangement, the sleeve can be firmly fixed to the fixture mounting plate, thereby improving the overall stability of the fixture.

[0011] Furthermore, the connecting rod includes a large diameter section and a small diameter section connected to each other, the large diameter section is located in the through hole, the small diameter section extends to the outside of the second end of the sleeve and is connected to the suction cup, and the limiting portion is used to limit the large diameter section of the connecting rod from escaping from the through hole.

[0012] Furthermore, the elastic member is compressibly disposed within the through hole, with a first end of the elastic member fixed and a second end connected to the large-diameter section of the connecting rod. With this arrangement, the elastic member is connected to the large-diameter section of the connecting rod, and during sliding movement of the connecting rod, the elastic member is squeezed or stretched, thereby providing cushioning and restoring capabilities for the connecting rod.

[0013] Furthermore, the through hole includes a first sliding hole and a second sliding hole arranged coaxially, the inner diameter of the first sliding hole is larger than the second sliding hole, so that a limiting portion is formed at the intersection of the first sliding hole and the second sliding hole, the large diameter section of the connecting rod is located in the first sliding hole, and the small diameter section of the connecting rod extends to the outside of the second end of the sleeve through the second sliding hole, and the limiting portion is used to limit the large diameter section from escaping from the first sliding hole, and the elastic member is also located in the first sliding hole, the first end of the elastic member is fixed in the first sliding hole, and the second end of the elastic member abuts against the large diameter section of the connecting rod.

[0014] Furthermore, the limiting portion is an annular stopper, which is arranged inside the through hole. The annular stopper has a through hole, the inner diameter of the through hole is smaller than the outer diameter of the large diameter section, and the inner diameter of the through hole is larger than the outer diameter of the small diameter section, so as to limit the large diameter section of the connecting rod from escaping from the through hole.

[0015] Furthermore, the elastic member is sleeved around the outer periphery of the small-diameter segment, with a first end of the elastic member connected to the large-diameter segment, and a second end of the elastic member connected to the stopper, so that when the connecting rod slides in the first direction, the elastic member provides elastic force to the connecting rod. With this arrangement, the elastic member is sleeved around the outer periphery of the small-diameter segment. When the connecting rod slides, the large-diameter segment and the stopper move relative to each other, thereby squeezing or stretching the elastic member, allowing the elastic member to provide cushioning and reset capabilities for the connecting rod.

[0016] Furthermore, the limiting portion includes a protrusion, which is arranged on the inner wall of the through hole. The connecting rod has a sliding groove corresponding to the protrusion. When the connecting rod slides along the first direction, the protrusion moves along the sliding groove to limit the connecting rod from escaping the through hole.

[0017] Furthermore, the limiting portion includes a protrusion, which is arranged on the side wall of the connecting rod. The through hole has a sliding groove corresponding to the protrusion. When the connecting rod slides along the first direction, the protrusion moves along the sliding groove to limit the connecting rod from falling out of the through hole.

[0018] Furthermore, a first interval between the suction cup and the end surface of the second end of the sleeve is 0 to 50 mm.

[0019] Furthermore, the elastic member is a spring.

[0020] A clamp, characterized in that it includes the above-mentioned elastic suction cup rod, and also includes a clamp mounting plate and a suction cup, the first end of the sleeve is connected to the clamp mounting plate by a bolt, the second end of the connecting rod is connected to the mechanical window of the suction cup, and there is a first gap between the end face of the second end of the sleeve and the mechanical window of the suction cup, so that when the suction cup contacts the carton, the suction cup squeezes the connecting rod to compress or stretch the elastic part, thereby increasing the flexibility of the suction cup.

[0021] Furthermore, the number of the elastic sucker rods is multiple, and the sucker is connected to the fixture mounting plate via the multiple evenly distributed elastic sucker rods. This arrangement can improve the stability of the sucker.

[0022] Furthermore, the number of the suction cups is multiple, and the multiple suction cups are evenly distributed on the clamp mounting plate, and each suction cup is connected to the clamp mounting plate via multiple evenly distributed elastic suction cup rods. Through this arrangement, a multi-station clamp is formed, which can achieve the simultaneous gripping of multiple cartons.

[0023] The utility model has the following advantages over the prior art:

[0024] 1. The elastic suction cup rod of the present invention is provided with a sleeve, wherein the interior of the sleeve has a through hole formed along a first direction, and a connecting rod is slidably arranged in the through hole along the first direction. The connecting rod extends out of the through hole and connects to the suction cup. At the same time, a first gap is formed between the suction cup and the second end of the sleeve. An elastic member is provided in the sleeve to provide elastic force to the connecting rod, thereby ensuring the stability of the connecting rod during the sliding process and providing buffering and reset capabilities when the connecting rod slides. A limit portion is also provided in the sleeve for limiting the sliding of the connecting rod out of the through hole. During operation, the first end of the sleeve is fixed to the fixture mounting plate, and the first end of the connecting rod extends out of the second end of the sleeve and connects to the suction cup. When the cardboard box is stacked at an angle and there is a distance difference between the cardboard surface and the cardboard box, the suction cup encounters resistance when contacting the cardboard box, and the connecting rod slides into the through hole, thereby allowing the disk surface of the suction cup to fully contact the deviated cardboard, achieving a successful grasping in one go without having to adjust the fixture position again. The elastic suction cup rod is highly flexible and effectively improves the grasping ability of the suction cup.

[0025] 2. The clamp in this utility model utilizes an elastic suction cup rod, which is bolted to the surface of the clamp mounting plate. The connecting rod of the elastic suction cup rod is connected to the suction cup, making this clamp highly flexible and thereby improving unloading efficiency. Multiple suction cups can also be arranged on the surface of the clamp mounting plate, secured by multiple elastic suction cup rods, thereby forming a multi-station clamp capable of simultaneously gripping multiple cartons. By utilizing the elastic suction cup rod, this clamp can, to a certain extent, adapt to the distance differences between the surfaces of multiple cartons, improving the overall flexibility of the system and enabling simultaneous gripping of multiple stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic cross-sectional view of the elastic suction cup rod in Example 1 of the present utility model;

[0027] Figure 2 This is a top view of the clamp in Example 1 of the present utility model;

[0028] Figure 3 This is an isometric view of the clamp in Example 1 of the present utility model;

[0029] Figure 4 This is a schematic structural diagram of the elastic suction cup rod in Example 2 of the present utility model;

[0030] Figure 5 This is a schematic structural diagram of the elastic suction cup rod in Example 3 of the present utility model;

[0031] Figure 6 This is a schematic structural diagram of the elastic suction cup rod in Example 4 of the present utility model;

[0032] Figure 7 This is a schematic structural diagram of the elastic suction cup rod in Example 5 of the present utility model;

[0033] In the figure: 1. sleeve; 2. through hole; 201. first sliding hole; 202. second sliding hole; 3. connecting rod; 301. large diameter section; 302. small diameter section; 4. elastic member; 5. limiting portion; 6. first spacer; 7. fixture mounting plate; 8. suction cup; 9. flange; 10. bolt; 11. fixing plate; 12. raised portion; 13. slide groove; 14. support rod. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that, in the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0036] In addition, it should be understood that for the convenience of description, the sizes of the various components shown in the drawings are not drawn according to the actual scale.

[0037] It should be noted that like numbers and letters represent similar items in the following figures, so once an item is defined or described in one figure, it will not need to be further discussed and described in detail in the description of the subsequent figures.

[0038] Example 1:

[0039] like Figure 1 As shown, the utility model provides an elastic suction cup rod, comprising: a sleeve 1, a connecting rod 3 and an elastic member 4, wherein the sleeve 1 has a first end and a second end, the first end of the sleeve 1 being used to connect to the fixture mounting plate 7, and the second end of the sleeve 1 being close to the suction cup 8; a through hole is provided in the sleeve 1 along a first direction, and the open end of the through hole 2 is communicated with the end face of the second end of the sleeve 1, wherein the first direction is the axial direction of the sleeve 1; specifically, a fixing plate 11 is provided on the outer periphery of the first end of the sleeve 1, and the fixing plate 11 is provided with bolt holes so that the sleeve 1 is fixed to the fixture mounting plate 7 by bolts 10. By fixing the sleeve 1 to the fixture mounting plate 7 by the bolts 10, the installation stability is improved while also facilitating assembly and disassembly, thereby improving the installation flexibility of the elastic suction cup rod.

[0040] The connecting rod 3 is slidably arranged in the through hole 2 along the first direction, and the first end of the connecting rod 3 extends to the outside of the second end of the sleeve 1, so that after the first end of the connecting rod 3 is connected to the suction cup 8, there is a first gap between the suction cup 8 and the end face of the second end of the sleeve 1. A limiting portion is provided in the through hole 2 to limit the connecting rod from escaping from the through hole; the first gap between the suction cup 8 and the end face of the second end of the sleeve 1 is 0 to 50 mm. Preferably, the first gap is 40 mm. A first gap 6 is reserved between the suction cup 8 and the end face of the second end of the sleeve 1. This first gap 6 is the distance that the suction cup 8 can slide into the through hole 2 following the connecting rod 3 after contacting the carton. By setting the first interval 6, the suction cup 8 can cope with the situation where the stacking position of the carton is skewed and there is a distance difference on the surface of the carton. The suction cup 8 contacts the carton. Due to the skewed position of the carton, only a small part of the suction cup 8 and the carton can be in contact, and grasping cannot be achieved. As the connecting rod 3 slides into the through hole 2, the suction cup 8 also moves with the connecting rod 3, so that the suction cup adjusts the disk surface to fully contact the skewed carton, and successful grasping can be achieved in one go.

[0041] The elastic member 4 is located within the through hole 2 and cooperates with the connecting rod 3 to provide elastic force to the connecting rod 3 when the connecting rod 3 slides in the first direction. This arrangement provides cushioning and restoring capabilities when the connecting rod 3 slides, increasing the flexibility of the mechanism. The elastic member 4 can be a spring or a spring.

[0042] When the connecting rod of the utility model slides along the first direction, it can drive the suction cup to move, thereby improving the flexibility of the suction cup and effectively coping with the situation where the cartons are stacked skewed and there are distance differences on the carton surfaces.

[0043] like Figure 1 As shown, the connecting rod 3 includes a large-diameter section 301 and a small-diameter section 302, which are connected. The large-diameter section 301 is located within the through-hole 2, while the small-diameter section 302 extends outward from the second end of the sleeve 1 and connects to the suction cup 8. The stopper 5 is used to prevent the large-diameter section 301 of the connecting rod 3 from falling out of the through-hole. Preferably, a bolt can be used as the connecting rod 3. This arrangement simplifies the structure of the connecting rod 3 and facilitates implementation.

[0044] In this embodiment, the elastic member 4 is compressibly disposed within the through hole 2, with the first end of the elastic member 4 fixed to the inner wall of the through hole 2. Alternatively, after the sleeve 1 is connected to the fixture mounting plate 7, the first end of the elastic member 4 can be connected to the fixture mounting plate 7, and the second end of the elastic member 4 is connected to the large-diameter section 301 of the connecting rod 3. With this arrangement, the elastic member 4 is connected to the large-diameter section of the connecting rod 3. During the sliding movement of the connecting rod 3, the elastic member 4 is squeezed or stretched, thereby providing the connecting rod 3 with a buffering and restoring capability.

[0045] The setting of the limiting portion 5 can adopt various forms. For example, in this embodiment, the through hole 2 is divided into a first sliding hole 201 and a second sliding hole 202 arranged coaxially. The inner diameter of the first sliding hole 201 is larger than the inner diameter of the second sliding hole 202, so that a step is formed at the intersection of the first sliding hole 201 and the second sliding hole 202, thereby having a limiting effect. The large diameter section 301 of the connecting rod 3 is located in the first sliding hole 201, and the small diameter section 302 of the connecting rod 3 is located in the second sliding hole 202. This step limiting portion is used to limit the large diameter section 301 from escaping from the first sliding hole 201. The elastic member 4 is also located in the first sliding hole 201. The first end of the elastic member 4 is fixed in the first sliding hole 201, and the second end of the elastic member 4 abuts against the large diameter section of the connecting rod 3.

[0046] In another embodiment, the limiting portion 5 is an annular stopper (not shown in the figure), which is arranged inside the through hole 2. The annular stopper has a through hole, and the inner diameter of the through hole is smaller than the outer diameter of the large diameter section 301, and the inner diameter of the through hole is larger than the outer diameter of the small diameter section 302, so that the small diameter section 302 can slide along the through hole while limiting the large diameter section 301 from escaping the through hole 2.

[0047] like Figure 2 and Figure 3 As shown, this embodiment also discloses a clamp, which includes the above-mentioned elastic suction cup rod, a clamp mounting plate 7 and a suction cup 8. The first end of the sleeve 1 is connected to the clamp mounting plate 7 by a bolt 10, and the second end of the connecting rod 3 is connected to the mechanical window of the suction cup 8. There is a first gap 6 between the end face of the second end of the sleeve 1 and the mechanical window of the suction cup 8, so that when the suction cup 8 contacts the carton, the suction cup 8 squeezes the connecting rod 3 and slides along the first direction, thereby compressing or stretching the elastic member 4, increasing the flexibility of the suction cup. The side of the clamp mounting plate 7 away from the sleeve is connected to the flange 9, and the clamp is installed on the robot arm through the flange 9, and the robot arm drives the clamp to complete the grasping work.

[0048] Preferably, there are multiple elastic suction cup rods, and the suction cup 8 is connected to the fixture mounting plate 7 through multiple evenly distributed elastic suction cup rods. This can improve the stability and flexibility of the suction cup.

[0049] Preferably, there are multiple suction cups 8, which are evenly distributed on the clamp mounting plate 7, and each suction cup is connected to the clamp mounting plate 7 via multiple evenly distributed elastic suction cup rods. Through this arrangement, a multi-station clamp is formed, which can achieve the simultaneous gripping of multiple cartons.

[0050] In this embodiment, the entire frame is made of 6061 aluminum alloy, achieving a lightweight design. When the top of the clamp is holding a heavy carton, the clamp's deadweight:load ratio can reach over 1:3.

[0051] In existing technologies, multi-station rigid clamps have difficulty adapting to differences in the surface position of the box, making it difficult to properly grasp all the boxes. The flexible multi-station clamp of the present utility model can adapt to the distance differences of the carton surface to a certain extent, improve the overall flexibility of the system, and achieve successful grasping of multiple positions in one go.

[0052] When used specifically:

[0053] The fixture mounting plate 7 is used to mount an array of elastic suction cup rods, which in turn secure multiple suction cups 8 to the gripper, enabling simultaneous gripping of multiple cartons. Depending on the size of the cartons and the number of cartons to be gripped simultaneously, the width and size of the suction cups 8 can be increased without affecting the overall structural design. The length and threaded hole positions of the flange 9 can also be adjusted to suit the robot arm model and reach requirements.

[0054] During operation, the sleeve 1 is connected to the mechanical window of the suction cup 6 through a connecting rod, and a compression spring is installed inside the sleeve to increase the flexibility of the mechanism. The sleeve 1 is threadedly fixed to the clamp mounting plate 7 by a bolt 10. When the front suction cup contacts the carton and encounters resistance, the spring is compressed and the overall length of the mechanism is reduced until the robotic arm controls the suction cup to completely adsorb the surface of the carton; when the suction cup pulls the carton, the spring relaxes, and the connecting rod is blocked by the limiting part inside the sleeve and will not fall out of the through hole. The mechanism recovers and provides pulling force to enable normal grasping of the carton. By arranging a spring and a connecting rod inside the sleeve, the clamp can adapt to the relative distance between the carton and the suction cup, and realize one-time grasping of the carton surface with random stacking.

[0055] The multi-station clamp with elastic suction cup rods can improve the unloading system's adaptability to box size and stacking position when actually handling the carton stacking surface, while also improving the unloading efficiency of the robotic arm's multi-station grabbing of cartons.

[0056] Example 2:

[0057] This embodiment is the same as embodiment 1 except for the following technical solutions:

[0058] like Figure 4As shown, in this embodiment, the elastic member is a spring. The elastic member 4 is sleeved on the outer circumference of the small diameter section 302, and the first end of the elastic member 4 is connected to the large diameter section 301, and the second end of the elastic member 4 is connected to the limiter 5. The limiter 5 is located at the end of the second end of the through hole 2. The inner diameter of the limiter 5 is just enough to allow the small diameter section 302 to slide, and can also limit the spring and the large diameter section 301 in the through hole 2. When the connecting rod 3 slides along the first direction, the elastic member 4 provides elastic force for the connecting rod 3. In this embodiment, the setting position of the elastic member 4 is different from that in Example 1. During operation, when the front end suction cup contacts the carton and encounters resistance, the elastic member 4 stretches and the overall length of the mechanism decreases until the robotic arm controls the suction cup to completely adsorb the carton surface; when the suction cup pulls the carton, the elastic member 4 recovers or is squeezed, and the elastic member 4 and the limiter 5 work together to limit the connecting rod 3 from falling out of the through hole 2. In this embodiment, other supporting components may be provided to support the stability of the connecting rod during the sliding process, which will not be described in detail in this embodiment.

[0059] Example 3:

[0060] This embodiment is the same as embodiment 1 except for the following technical solutions:

[0061] like Figure 5 As shown, in this embodiment, the limiting portion 5 differs from that of Example 1, and the connecting rod 3 can be a straight rod. Specifically, the limiting portion 5 includes a protrusion 12 located on the inner wall of the through-hole 2. The connecting rod 3 defines a sliding groove 13 corresponding to the protrusion 12. The length of the sliding groove 13 matches the first interval 6. When the connecting rod 3 slides in the first direction, the protrusion 12 moves along the sliding groove 13 to prevent the connecting rod 3 from falling out of the through-hole. To maintain stability, the number of protrusions 12 and the sliding groove 13 can be a corresponding number, or the protrusion 12 can be annular, and the shape of the sliding groove 13 can be set to correspond to the protrusion 12.

[0062] Example 4:

[0063] This embodiment is the same as embodiment 1 except for the following technical solutions:

[0064] like Figure 6As shown, in this embodiment, the limiting portion 5 is different from that in Example 1, and the connecting rod 3 can be a straight rod. Specifically, the limiting portion 5 includes a protrusion 12, which is arranged on the side wall of the connecting rod 3. The through hole 2 is provided with a slide groove 13 corresponding to the protrusion 12. The length of the slide groove 13 matches the first interval 6. When the connecting rod 2 slides in the first direction, the protrusion 12 moves along the slide groove 13 to prevent the connecting rod 3 from falling out of the through hole. To maintain stability, the number of protrusions 12 and the slide groove 13 can be corresponding, or the protrusion 12 can be annular, and the shape of the slide groove 13 can be set corresponding to the protrusion 12. To facilitate assembly, the protrusion 12 is configured as a pressable sliding key. During assembly, the protrusion is pressed down, and it can retreat into the connecting rod. Under the pressure of the inner wall of the through hole, it slides along the inner wall of the through hole into the slide groove 13 and then extends outward.

[0065] Example 5:

[0066] This embodiment is the same as embodiment 4 except for the following technical solutions:

[0067] like Figure 7 As shown, in this embodiment, the slide groove 13 is extended to the first end of the sleeve 1, facilitating the insertion of the connecting rod 3 with the protrusion 12 into the through-hole 2. To enhance the stability of the spring, a support rod 14 is also provided on the fixture mounting plate 7. This support rod 14 is shorter than the spring, thus allowing sufficient sliding distance for the connecting rod 3. During assembly, the spring fits around the outer periphery of the support rod 14, which also serves to position the connection and restrict the maximum distance the connecting rod 3 can extend into the through-hole.

[0068] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elastic suction cup rod, characterized in that: include: A sleeve having a first end and a second end, wherein the first end of the sleeve is used to connect to the fixture mounting plate, and the second end of the sleeve is close to the suction cup; a through hole is defined in the sleeve along a first direction, and the open end of the through hole is in communication with the end surface of the second end of the sleeve, wherein the first direction is the axial direction of the sleeve; a connecting rod slidably disposed in the through hole along a first direction, the first end of the connecting rod extending toward the exterior of the second end of the sleeve so that, after the first end of the connecting rod is connected to the suction cup, a first gap is formed between the suction cup and an end surface of the second end of the sleeve, and a limiting portion is provided in the through hole to prevent the connecting rod from falling out of the through hole; An elastic member is located in the through hole and is used to cooperate with the connecting rod to provide elastic force for the connecting rod when the connecting rod slides along the first direction.

2. The elastic suction cup rod according to claim 1, characterized in that: The connecting rod includes a large diameter section and a small diameter section connected to each other. The large diameter section is located in the through hole, and the small diameter section extends to the outside of the second end of the sleeve and is connected to the suction cup. The limiting portion is used to limit the large diameter section of the connecting rod from escaping from the through hole.

3. The elastic suction cup rod according to claim 2, characterized in that: The elastic member is compressibly arranged in the through hole, the first end of the elastic member is fixed, and the second end of the elastic member is connected to the large-diameter section of the connecting rod.

4. The elastic suction cup rod according to claim 3, characterized in that: The through hole includes a first sliding hole and a second sliding hole arranged coaxially. The inner diameter of the first sliding hole is larger than the second sliding hole, so that a limiting portion is formed at the intersection of the first sliding hole and the second sliding hole. The large diameter section of the connecting rod is located in the first sliding hole, and the small diameter section of the connecting rod extends to the outside of the second end of the sleeve through the second sliding hole. The limiting portion is used to limit the large diameter section from escaping from the first sliding hole. The elastic member is located in the first sliding hole, the first end of the elastic member is fixed in the first sliding hole, and the second end of the elastic member abuts against the large diameter section of the connecting rod.

5. The elastic suction cup rod according to claim 2, characterized in that: The elastic member is sleeved on the outer circumference of the small diameter section, and the first end of the elastic member is connected to the large diameter section, and the second end of the elastic member is connected to the limiting portion, so that when the connecting rod slides along the first direction, the elastic member provides elastic force for the connecting rod.

6. The elastic suction cup rod according to claim 1, characterized in that: The limiting portion includes a protrusion, which is arranged on the inner wall of the through hole. The connecting rod is provided with a sliding groove corresponding to the protrusion. When the connecting rod slides along the first direction, the protrusion moves along the sliding groove to prevent the connecting rod from falling out of the through hole. Alternatively, the limiting portion includes a protrusion, which is arranged on the side wall of the connecting rod, and the through hole is provided with a sliding groove corresponding to the protrusion. When the connecting rod slides along the first direction, the protrusion moves along the sliding groove to limit the connecting rod from falling out of the through hole.

7. The elastic suction cup rod according to claim 1, characterized in that: A first interval between the suction cup and the end surface of the second end of the sleeve is 0 to 50 mm.

8. A clamp, characterized in that: It comprises the elastic suction cup rod according to any one of claims 1 to 7, and also comprises a clamp mounting plate and a suction cup, the first end of the sleeve is connected to the clamp mounting plate, the second end of the connecting rod is connected to the mechanical window of the suction cup, and there is a first gap between the end face of the second end of the sleeve and the mechanical window of the suction cup, so that when the suction cup contacts the carton, the suction cup squeezes the connecting rod to compress or stretch the elastic part, thereby increasing the flexibility of the suction cup.

9. The clamp according to claim 8, characterized in that: There are multiple elastic suction cup rods, and the suction cup is connected to the fixture mounting plate through multiple evenly distributed elastic suction cup rods.

10. The clamp according to claim 8, wherein: There are multiple suction cups, and the multiple suction cups are evenly distributed on the fixture mounting plate, and each suction cup is connected to the fixture mounting plate through a plurality of evenly distributed elastic suction cup rods.

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