A flexible clamping claw and its fixing tension spring

Abstract

The present invention relates to the technical field of spring clamps, and specifically to a flexible clamping claw and a tension spring fixed therein, comprising a tension spring assembly, wherein the tension spring assembly consists of a tension spring body and two tension spring bolts, wherein the outer threads of the two tension spring bolts can be screwed in from the inner sides of both ends of the tension spring body and tightened with the pitch threads of the tension spring body, the outer ends of the two tension spring bolts are integrally fixed with an outer connecting head, and the opposite sides of the two tension spring bolts are locked with an inner locking sheet, and by designing two tension spring bolts on the inner sides of both ends of the tension spring body that can be screwed in with threads, the thread diameter and pitch of the tension spring bolts will be slightly larger than the tension spring body, and the tension spring body will tend to shrink in diameter when stretched, so the bolt is not easy to fall out when the tension spring body is frequently extended and retracted, and the force of the deformation of the tension spring body will act on the entire tension spring bolt connection without concentrating the stress on a certain point, thereby greatly improving the service life and stability of the entire tension spring.

Description

Technical Field

[0001] The invention relates to the technical field of spring clamps, in particular to a flexible clamping claw and a fixing tension spring thereof. Background Art

[0002] In the production process of bottle and can production workshops, the clamp is an important tool for taking bottles and cans. At present, hard clamping methods such as electric clamps and pneumatic clamps are widely used. These hard clamps have many problems in actual use. The clamping effect is often relatively stiff. When clamping the product, the force must be accurately controlled to stably clamp the product, otherwise it is easy to cause damage or wear to the bottle; to solve the above problems, flexible clamps are introduced on the market. This flexible clamp is usually composed of two clamping plates that rotate relative to each other, and the elastic force of the tension spring is used to relatively displace, so as to elastically clamp the bottle. This structural design enables the flexible clamp to better adapt to the clamping operation of the bottle, however, the flexible clamp still has the following shortcomings:

[0003] 1. Stress concentration and life of the tension spring. When the tension spring is subjected to tensile force, stress concentration will occur at the root of the tension spring hook, which will cause the material deformation degree of the stress concentration part to be greater than that of other parts. Under the continuous action of cyclic stress or strain, not only stress concentration will occur inside the material, but also plastic deformation will occur, which will eventually cause premature fatigue fracture of the tension spring.

[0004] The expansion and contraction times of ordinary tension springs are about 100,000 times. Even for tension springs with specially designed spring hooks, their service life is less than 1 million times. This short service life seriously limits the use of flexible clamps. Moreover, since the elastic tension of the tension spring is fixed and limited, the elastic clamping force of the two clamps is difficult to be effectively improved.

[0005] 2. The problem of the stability of the jaw rotation structure and the clamping stability. The existing flexible jaws rely on a single shaft to achieve the relative rotation of the two jaws. This structure is not stable when clamping bottles and cans, which may cause the clamping of the bottle and cans by the jaws to be unstable, and the bottle and cans cannot be further tightened and fixed.

[0006] 3. The splint area is insufficient and cannot be adjusted. The splint area for clamping bottles and cans is fixed and cannot be adjusted according to actual usage requirements, thus affecting the overall use effect.

[0007] In summary, it is necessary to propose an improved flexible clamp and a fixed tension spring thereof. Summary of the invention

[0008] The present invention provides a flexible clamping claw and a fixed tension spring thereof, which overcome the deficiencies described in the background art.

[0009] The technical solution adopted by the present invention to solve the technical problem is: a fixed tension spring, including a tension spring assembly, the tension spring assembly is composed of a tension spring body and two tension spring bolts, the outer threads of the two tension spring bolts can be screwed in from the inner sides of the two ends of the tension spring body, and tightened with the pitch thread of the tension spring body;

[0010] The outer ends of the two tension spring bolts are integrally fixed with an external connecting head;

[0011] The two tension spring bolts are locked with inner locking sheets on one side opposite to the other, and a plurality of elastic pull strips are locked with the two inner locking sheets on one side opposite to the other, and the elastic pull strips are arranged inside the tension spring body.

[0012] A flexible clamp comprises two clamps arranged to rotate relative to each other, a rotating shaft is installed at the rear end of the two clamps, and a transmission convex tooth is fixedly arranged on the opposite side of the rear end of the two clamps, a tension spring groove is opened on the opposite side of the middle part of the two clamps for clamping the two sides of the tension spring body, two tension spring bolts are inserted from the outside of the clamps and clamped in the tension spring grooves, and the two ends of the tension spring body are locked on the two tension spring grooves, upper clamps are respectively fixedly arranged at the front ends of the two clamps for clamping bottles and cans, and a tightening and adsorption assembly is movably arranged between the upper clamp and the tension spring assembly for tightening and adsorbing one side of the bottle and can.

[0013] A further improvement based on the above technical solution is that movable rods are respectively installed vertically and rotatably in the middle of the two clamping jaws, and the bottoms of the two movable rods are connected to the tightening adsorption assembly to control the forward and backward movable displacement of the tightening adsorption assembly.

[0014] A further improvement based on the above technical solution is that a lower clamping plate is movably arranged under the upper clamping plate, and a vertical guide rod and an adjusting screw are penetrated by the lower clamping plate, wherein the adjusting screw is threadedly connected to the lower clamping plate, and the vertical guide rod and the adjusting screw are both rotatably installed at the bottom of the upper clamping plate.

[0015] A further improvement based on the above technical solution is that elastic rubber gaskets are locked on one side of the upper clamping plate and the lower clamping plate for elastically clamping the bottle parts.

[0016] A further improvement based on the above technical solution is that the tightening adsorption assembly includes a suction cup arranged toward the front, a connecting tube integrally arranged on the rear side of the suction cup, and two connecting rods rotatably connected to the bottom ends of the two movable rods respectively, the other ends of the two connecting rods are rotatably connected in a V-shape, and the upper side is connected with an L-shaped movable seat, the upper side of the L-shaped movable seat is slidably connected with a mounting top plate forward and backward, the suction cup is arranged on the front side of the mounting top plate, and the connecting tube is installed through the middle part of the mounting top plate, a plurality of sliding guide rods are longitudinally installed on the rear side of the mounting top plate, each of the sliding guide rods is penetrated by the L-shaped movable seat, and a buffer spring is sleeved on the sliding guide rod, and the buffer spring is elastically supported between the mounting top plate and the L-shaped movable seat.

[0017] A further improvement based on the above technical solution is that a universal rotating ball head is installed in the middle of the mounting top plate, and the connecting pipe is installed by passing through the middle of the universal rotating ball head.

[0018] A further improvement based on the above technical solution is that an inner movable groove for the connection pipe to move is opened in the middle of the L-shaped movable seat, and an elastic rubber ring is fixed inside the movable groove, and the connection pipe passes through the middle of the elastic rubber ring.

[0019] A further improvement based on the above technical solution is that it includes a lifting plate for rotatably installing two clamping jaws, the lifting plate is provided with two arc-shaped limit grooves with two rotating shafts as the center, the two movable rods are respectively penetrated by the arc-shaped limit grooves, a convex plate is integrally provided on the front side of the lifting plate, the convex plate is arranged under the tension spring assembly, the L-shaped movable seat is slidably arranged on the upper side of the convex plate, a guide groove is longitudinally provided in the middle part of the convex plate, a rectangular slider is fixedly provided at the bottom of the L-shaped movable seat for sliding in coordination with the guide groove, and the bottom of the rectangular slider is rotatably connected to the connecting rod shaft.

[0020] A further improvement based on the above technical solution is that a mounting base is installed under the lifting plate, and a plurality of electric push rods and lifting guide rods are installed on the mounting base. The telescopic ends of the electric push rods are locked and connected to the lifting plate, and a flexible clamp is set on the lifting guide rods passing through both sides of the lifting plate.

[0021] By adopting the above technical solution, the present invention has the following advantages compared with the existing technology:

[0022] The structure of the present invention is compact and ingenious. By designing two tension spring bolts on the inner sides of the two ends of the tension spring body that can be threaded and screwed in, the thread diameter and pitch of the tension spring bolts are slightly larger than the tension spring body. The tension spring body has a tendency to shrink in diameter when stretched. Therefore, when the tension spring body is frequently stretched and retracted, the bolt is not easy to fall out, and the force of the deformation of the tension spring body acts on the entire tension spring bolt connection without concentrating the stress on a certain point, which can greatly improve the service life and stability of the entire tension spring.

[0023] Secondly, an elastic pull bar is connected between the two tension spring bolts, which can not only improve the elastic tension between the two tension spring bolts, but also greatly improve the elastic force of the entire tension spring and the clamping force of the two clamping jaws by combining the elastic tension of the tension spring body itself, and the number of elastic pull bars installed can also be adjusted according to the use requirements, so as to adapt to the elastic clamping force required by the two clamping jaws, which is simple and flexible to use, and the two ends of the elastic pull bar are locked with inner locking plates by screws, which can be better disassembled and connected with the tension spring bolts through the inner locking plates;

[0024] Since a tightening adsorption component is arranged between the two clamping jaws, when the two clamping jaws rotate around the rotating shaft, the tightening adsorption component can be pushed and pulled forward or backward through the middle movable rod, that is, when the two clamping jaws are relatively displaced to clamp the bottle and can parts, the two movable rods push the two V-shaped connecting rods forward, and the connecting rods drive the L-shaped moving seat to slide elastically forward to push the installation top plate, so that the suction cup of the installation top plate can be adaptively tightened on the rear side of the bottle and can parts, and the bottle and can parts are adsorbed and connected, thereby improving the clamping stability of the bottle and can parts;

[0025] Furthermore, a universal rotating ball head is rotatably connected to the middle of the mounting top plate for mounting a suction cup, so that the suction cup can rotate when in contact with the bottle part to better match the different shapes of the adsorbed bottle parts, and an inner movable groove is provided on the L-shaped movable seat for the connection pipe at the rear side of the suction cup to move, so as to avoid limiting the rotation of the suction cup. In order to enable the suction cup to automatically reset and maintain a forward state after the suction cup is separated from the bottle part, an elastic rubber ring is installed in the inner movable groove for the connection pipe to pass through, so that the elastic effect of the elastic rubber ring can be utilized to always generate elastic force to correct the connection pipe and the suction cup, which not only maintains the reset effect of the suction cup, but also allows the suction cup to better contact with the bottle part;

[0026] A lower clamping plate that can move up and down is also provided on the lower side of the upper clamping plate. The lower clamping plate can not only cooperate with the upper clamping plate to clamp the bottle and can parts synchronously to improve the clamping range and stability, but also the distance between the lower clamping plate and the upper clamping plate can be adjusted according to the use requirements, so as to be suitable for clamping different product sizes and specifications, and the use flexibility is high. In addition, a whole piece of elastic rubber gasket of corresponding height is locked on one side of the upper clamping plate and the lower clamping plate. The elastic rubber gasket can not only improve the elastic clamping and anti-slip effect with the bottle and can parts, but also increase the contact area with the bottle and can parts. In particular, for some bottle and can parts with irregular surfaces such as arc-shaped protrusions and particles in the middle, the middle part of the elastic rubber gasket can be stretched to achieve a tightening effect, which greatly improves the tightness of the connection and the stability of the clamping effect.

[0027] Finally, a lifting plate is provided to cooperate with the use of the clamping claws, that is, two arc-shaped limit grooves are provided on the lifting plate, so that the movable rod can be limited and guided along the arc-shaped limit grooves, so that the clamping claws can rotate more stably, and the movable rod can push and pull the adsorption component forward and backward more stably. At the same time, the convex plate at the front end of the lifting plate is also longitudinally provided with a guide groove for the L-shaped moving seat to slide back and forth, and the two V-shaped connecting rods themselves have the function of pushing the L-shaped moving seat back and forth, which provides good double support and double guide sliding for the L-shaped moving seat, so that the adsorption effect of the suction cup is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1It is a structural schematic diagram of the tension spring assembly of the present invention;

[0030] Figure 2 It is an exploded schematic diagram of the tension spring assembly of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the external connector of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the clamping jaws of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the tightening adsorption assembly and the movable rod of the present invention;

[0034] Figure 6 It is a schematic diagram of the connection structure between the lower clamping plate and the upper clamping plate of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the elastic rubber gasket and the lifting plate of the present invention;

[0036] Figure 8 It is a schematic diagram of the connection structure between the lifting plate and the tightening adsorption assembly of the present invention;

[0037] Fig. 9 It is a schematic diagram of the overall structure of the present invention;

[0038] Fig.10 For the present invention Fig. 9 Another perspective structural diagram of;

[0039] In the figure: tension spring assembly 1, tension spring body 101, tension spring bolt 102, external connector 103, internal locking piece 104, elastic pull strip 105, clamping claw 2, rotating shaft 21, transmission convex tooth 22, movable rod 23, tension spring groove 24, upper clamping plate 25, tightening adsorption assembly 3, suction cup 30, connecting pipe 301, connecting rod 31, L-shaped movable seat 32, inner movable groove 321, elastic rubber ring 322, rectangular slider 33, mounting top plate 34, universal rotating ball head 35, sliding guide rod 36, buffer spring 37, lower clamping plate 4, vertical guide rod 41, adjusting screw 42, elastic rubber gasket 5, lifting plate 6, arc limit groove 61, convex plate 62, guide slide groove 63, mounting base 7, electric push rod 8, lifting guide rod 9. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0041] like Figure 1-10As shown, a fixed tension spring includes a tension spring assembly 1, which consists of a tension spring body 101 and two tension spring bolts 102. The external threads of the two tension spring bolts 102 can be screwed in from the inner sides of both ends of the tension spring body 101 and tightened with the pitch thread of the tension spring body 101, so that the tension spring bolts 102 are tightly connected to the tension spring body 101. The thread diameter and pitch of the tension spring bolts 102 are slightly larger than those of the tension spring body 101. The diameter of the tension spring body 101 will shrink when it is stretched, so that it is more tightly connected to the thread of the tension spring bolt 102. In this way, the tension spring bolt 102 is not easy to come out when the tension spring body 101 is frequently extended and retracted, and the deformation force of the tension spring body 101 acts on the entire connection of the tension spring bolt 102, and the stress will not be concentrated on a certain point of the tension spring body 101, which greatly improves the service life and stability of the entire tension spring.

[0042] At the same time, the outer ends of the two tension spring bolts 102 are integrally fixed with an external connector 103, which is mainly used to fasten and connect with external object parts, such as Figure 1 As shown, the external connector 103 can be a retaining ring, and the retaining ring is used to connect to play a limiting role; of course, if Figure 3 As shown, the outer end of the external connector 103 can also be a structure with a hook or a hole, which can be hung and connected with the external object part (claw) when in use, so that the connecting end of the tension spring bolt 102 can be designed and manufactured according to any needs, and the installation is flexible and diverse.

[0043] The two tension spring bolts 102 are locked with inner locking plates 104 on the opposite sides, and the two inner locking plates 104 are locked with four elastic pull strips 105 on the opposite sides, and the elastic pull strips 105 are arranged on the inner side of the tension spring body 101, and the elastic pull strips 105 are made of elastic materials such as elastic rubber and cloth. The elastic pull strips 105 can not only improve the elastic tension between the two tension spring bolts 102, and combined with the elastic tension of the tension spring body 101 itself, it can greatly improve the elastic force of the entire tension spring and the clamping strength of the two clamping jaws 2, and the installation quantity of the elastic pull strips 105 can be adjusted according to the use requirements to adapt to the elastic clamping strength required by the two clamping jaws 2. It is simple and flexible to use. At the same time, it is also convenient to lock the two ends of the elastic pull strip 105 on the opposite side of the two tension spring bolts 102 through the inner locking plates 104, which is convenient for later maintenance.

[0044] In the specific implementation, first, when assembling the tension spring assembly 1, the number of elastic pull strips 105 to be installed is determined according to the actual elastic tension required. For example, in the application scenario of this embodiment that requires a larger clamping force, four elastic pull strips 105 are installed. During installation, the two ends of the four elastic pull strips 105 are respectively locked with a corresponding number of inner locking plates 104 to form a whole, and then one of the inner locking plates 104 is screwed with one of the tension spring bolts 102, and the integral elastic pull strip 105 is placed in the tension spring body 101. First, the external thread of one of the tension spring bolts 102 is screwed into the pitch thread on the inner side of the two ends of the tension spring body 101. Since the thread and tooth pitch of the tension spring bolt 102 are slightly larger than the tension spring body 101, a tight fit is ensured during the screwing-in process, and then the other one is screwed into the tension spring body 101. On the other end, since the tension spring body 101 is an elastic object, the two ends of the tension spring body 101 are simultaneously pulled apart and the middle part of the tension spring body 101 is bent, so that the pitch of the middle part of the tension spring body 101 is partially opened. At this time, a screwdriver can be inserted to screw in another inner locking piece 104 and the tension spring bolt 102 to form a whole. Then, the outer connecting head 103 at the outer end of the tension spring bolt 102 is fastened to the two clamping claws 2. Due to the special connection method between the tension spring bolt 102 and the tension spring body 101, the tension spring body 101 will not fall out of the tension spring bolt 102 during frequent expansion and contraction, and the stress is dispersed in the entire connection part, so that the service life of the tension spring is significantly improved. After testing, under the same frequency of use, the service life of this tension spring assembly is several times longer than that of traditional tension springs. At the same time, due to the adjustability of the elastic pull strip 105, the elastic force of the tension spring can be flexibly adjusted according to actual needs, making the clamping force of the two clamping jaws 2 more precise, effectively avoiding damage to the bottle or unstable clamping due to excessive or insufficient clamping force.

[0045] Based on the above technical scheme, a flexible clamp is also proposed in this embodiment, comprising two clamps 2 arranged to rotate relative to each other, a rotating shaft 21 is installed at the rear end of the two clamps 2, and a transmission convex tooth 22 is fixed on the opposite side of the rear end of the two clamps 2, and a tension spring groove 24 is opened on the opposite side of the middle part of the two clamps 2 for clamping the two sides of the tension spring body 101, and two tension spring bolts 102 are inserted from the outside of the clamps 2 and clamped in the tension spring groove 24, and the external connectors 103 at both ends of the tension spring body 101 are locked on the two tension spring grooves 24, the tension spring groove 24 opened on the opposite side of the middle part of the clamps 2 is used to clamp the two sides of the tension spring body 101, and the two tension spring bolts 102 can lock the external connectors 103 at both ends of the tension spring body 101 on the two tension spring grooves 24; so that the tension spring assembly 1 can effectively provide elastic clamping force for the clamps 2, and in practical applications, the elastic force of the tension spring can be adaptively adjusted according to the size and material of the bottle. For example, for lighter and more fragile plastic bottles and cans, the tension spring can provide a relatively small but sufficiently stable clamping force to prevent the bottles and cans from being damaged. For heavier and stronger glass bottles and cans, the tension spring body 101 and the elastic pull strip 105 can provide a sufficiently strong clamping force to ensure that the bottles and cans will not fall during the process of being grasped and moved.

[0046] This connection mode between the tension spring slot 24 and the tension spring assembly 1 also increases the compactness of the entire clamp structure. Compared with the traditional connection mode between the clamp and the elastic element, this structure reduces unnecessary space occupation.

[0047] The front ends of the two clamping jaws 2 are respectively fixed with upper clamping plates 25 for clamping bottles and cans. The upper clamping plates 25 at the front ends of the two clamping jaws 2 are used to directly contact and clamp the bottles and cans. The fixed position and shape design of the upper clamping plates 25 are optimized according to the shape characteristics of the bottles and cans. For example, for round bottles and cans, the inner side of the upper clamping plates 25 can be designed in an arc shape to better fit the surface of the bottles and cans, increase the contact area, and thus improve the stability of clamping. A tightening and adsorption assembly 3 is movably provided between the upper clamping plates 25 and the tension spring assembly 1, which is used to tighten and adsorb one side of the bottles and cans, and can additionally increase stability. In the process of the clamping jaws 2 clamping the bottles and cans, the tightening and adsorption assembly 3 can tighten one side of the bottles and cans and adsorb them. The dual effects of this tightening and adsorption can prevent the bottle from making a slight displacement in the clamp when there is a slight vibration on the production line or the clamp needs to adjust its direction when moving the bottle, while the tightening effect further ensures that the bottle fits tightly against the inner side of the upper clamp 25. For bottles with smoother surfaces, the effect of this tightening and adsorption component 3 is more obvious, which can effectively prevent the bottle from slipping out of the clamp, greatly improving the reliability and stability of the entire clamp system in different working environments.

[0048] The rotating shaft 21 at the rear end of the two clamping jaws 2 is installed on the installation position of the lifting plate 6, providing a stable fulcrum for the relative rotation of the clamping jaws 2, which enables the clamping jaws 2 to open in a controllable manner. In actual operation, for example, on a high-speed production line in a bottle and can production workshop, this stable rotation structure can ensure that the clamping jaws are accurately positioned at the grabbing position of the bottle and can. The rotating shaft 21 of one of the clamping jaws 2 is connected to a driving source such as an external motor or a telescopic cylinder. When the transmission cam 22 is engaged, the two clamping jaws 2 can be rotated synchronously, and the upper clamping plate 25 can be ensured to rotate together with the two clamping jaws 2 to ensure movement synchronization. When grabbing bottles and cans of different shapes and sizes, this synchronization can ensure that the clamping force is applied evenly by the clamping jaws 2 to avoid the situation where the bottle and can tilt or slip due to one side of the clamping jaw contacting the bottle and can first.

[0049] In the above technical scheme, movable rods 23 are respectively installed vertically and rotatably in the middle of the two clamping jaws 2, and the bottoms of the two movable rods 23 are connected to the tightening adsorption assembly 3 to control the forward and backward movable displacement of the tightening adsorption assembly 3. The tightening adsorption assembly 3 includes a suction cup 30 arranged toward the front, a connecting pipe 301 integrally arranged at the rear side of the suction cup 30, and two connecting rods 31 rotatably connected to the bottom ends of the two movable rods 23 respectively. The suction cup 30 is externally connected to an air suction pump. When the clamping jaws 2 are relatively displaced, the movable rods 23 push the suction cup 30 forward to move. When the suction cup 30 contacts the surface of the bottle, it can not only elastically support the bottle and jar parts to be stabilized on the clamping jaws 2, but also use the adsorption characteristics of the suction cup 30 itself to tightly adsorb the bottle and jar parts, which is very important for the appearance. For bottles and cans with smooth surfaces or certain curvatures, the adsorption effect of the suction cup 30 is particularly important. For example, when grabbing round bottles and cans made of glass, the suction cup 30 can effectively overcome the smoothness of the bottle and can surface and prevent the bottle and can from sliding or falling in the clamp 2. The connecting pipe 301 plays the role of connecting with the external suction and transmitting gas; the other ends of the two connecting rods 31 are connected in a V-shaped rotation, and the upper side is connected to an L-shaped movable seat 32. The upper side of the L-shaped movable seat 32 is connected to a mounting top plate 34 for sliding forward and backward. The suction cup 30 is arranged on the front side of the mounting top plate 34, and the connecting pipe 301 is installed through the middle of the mounting top plate 34. This connecting rod structure transmits the movement of the movable rod 23 to the L-shaped movable seat 32, and realizes the conversion and amplification of force. In the opening and closing action of the clamp 2, the connecting rod 31 can convert the relatively small displacement of the movable rod 23 into a larger forward and backward sliding displacement of the L-shaped movable seat 32, thereby effectively pushing the mounting top plate 34 and the suction cup 30 forward to press the bottle and can. For example, when the clamping jaw 2 just begins to clamp the bottle, the slight displacement of the movable rod 23 can cause the L-shaped movable seat 32 to generate sufficient displacement through the action of the connecting rod 31 to ensure that the suction cup 30 is in close contact with the bottle. A plurality of sliding guide rods 36 are longitudinally installed on the rear side of the mounting top plate 34. Each sliding guide rod 36 is penetrated by the L-shaped movable seat 32, and a buffer spring 37 is sleeved on the sliding guide rod 36. The buffer spring 37 is elastically supported between the mounting top plate 34 and the L-shaped movable seat 32, so as to realize the elastic tightening of the suction cup 30, which plays a buffering and stabilizing role in the tightening and adsorption process. When the suction cup 30 is tightening the bottle, if there is a slight unevenness on the surface of the bottle or there is a sudden impact force during the clamping process, the buffer spring 37 can absorb these energies to prevent damage to the bottle. At the same time, the sliding guide rod 36 ensures the linearity of the mounting top plate 34 in the process of sliding forward and backward, so that the tightening action of the suction cup 30 is more stable and reliable. Especially when the conveying speed of bottles and cans on the production line is fast, this buffering and stabilizing structure can ensure that the suction cup 30 will not damage the bottle or cause adsorption failure due to excessive impact force when it contacts the bottle.

[0050] A further improvement is that a universal rotating ball head 35 is installed in the middle of the mounting top plate 34, and the connecting pipe 301 is installed through the middle of the universal rotating ball head 35. The universal rotating ball head 35 enables the suction cup 30 to be rotated and adjusted according to the shape of the bottle when in contact with the bottle. For bottles with irregular shapes or special curvatures, this rotation adjustment capability can ensure that the suction cup 30 fits the surface of the bottle to the greatest extent, thereby better adapting to the surface shape of the bottle and ensuring stable adsorption force.

[0051] The inner movable groove 321 provides a movable space for the connecting tube 301 to move, ensuring that the suction cup 30 can rotate freely without restriction under the action of the universal rotating ball head 35. An elastic rubber ring 322 is fixedly arranged on the inner side of the movable groove 321, and the connecting tube 301 passes through the middle part of the elastic rubber ring 322. On the one hand, the elastic rubber ring 322 can play a certain role in limiting and straightening the connecting tube 301. On the other hand, when the suction cup 30 is separated from the bottle, the elasticity of the elastic rubber ring 322 can cause the connecting tube 301 and the suction cup 30 to automatically reset, keeping the suction cup 30 in a forward state so as to accurately adsorb the bottle next time. In the continuous bottle grabbing and releasing operations, the elastic rubber ring 322 can ensure that the suction cup 30 can quickly and accurately return to the initial position each time, thereby improving the working efficiency of the entire clamping system.

[0052] In this embodiment, a lower clamping plate 4 is movably arranged below the upper clamping plate 25, which increases the flexibility of clamping the bottle and can parts. For bottle and can parts of different heights, the lower clamping plate 4 can adjust its position as needed, so that the upper and lower clamping plates can better fit the height of the bottles and cans, and increase the clamping range and area, thereby improving the stability of clamping. The lower clamping plate 4 is penetrated by a vertical guide rod 41 and an adjusting screw 42, wherein the adjusting screw 42 is threadedly connected to the lower clamping plate 4, and the vertical guide rod 41 and the adjusting screw 42 are both rotatably installed at the bottom of the upper clamping plate 25, and the vertical guide rod 41 plays a guiding role, ensuring that the lower clamping plate 4 moves in a straight line during the up and down movement, thereby preventing the lower clamping plate 4 from offsetting. This makes the movement of the lower clamping plate 4 more precise, and the lower clamping plate 4 can be accurately aligned when adjusting the spacing between the clamping plates and the upper clamping plate 25. When the clamping plate spacing needs to be accurately adjusted to accommodate bottles and cans of a specific diameter, the vertical guide rod 41 ensures that the lower clamping plate 4 will not shake left and right, and can clamp the bottles and cans synchronously with the upper clamping plate 25. The adjusting screw 42 realizes the precise adjustment of the position of the lower clamping plate 4. This adjustment method is simple and effective, and can be quickly adjusted according to the sizes of different bottles and cans on the production line.

[0053] The elastic rubber gasket 5 locked on one side of the clamping plate 25 and the lower clamping plate 4 provides elastic force for clamping the bottle. When clamping the bottle, the elastic rubber gasket 5 can be elastically deformed according to the shape and surface irregularities of the bottle. For example, when there are arc-shaped protrusions or tiny particles on the surface of the bottle, the elastic rubber gasket 5 can fill these gaps, making the contact between the clamping plate and the bottle closer, thereby improving the stability of clamping.

[0054] The elastic properties of the elastic rubber gasket 5 can also protect the surface of the bottle. Compared with the rigid clamping plate directly contacting the bottle, the elastic rubber gasket 5 can buffer the pressure applied to the bottle during the clamping process to avoid scratches or indentations on the surface of the bottle. This protective effect is particularly important for some delicate bottles with easily damaged surfaces, such as glass craft bottles, to ensure the appearance integrity of the bottles during the clamping and transportation process.

[0055] Finally, the elastic rubber gasket 5 also increases the friction effect. When the elastic rubber gasket 5 contacts the surface of the bottle, due to its material characteristics, it can increase the friction, which helps prevent the bottle from sliding when being clamped. On the production line, if the bottle slides in the clamp 2, it may cause the bottle to fall, be damaged, or affect subsequent production processes. The friction provided by the elastic rubber gasket 5 can effectively solve this problem and improve the reliability of the entire clamp system.

[0056] A further improvement is that a lifting plate 6 is provided for rotatably mounting the two clamping jaws 2. The lifting plate 6 is provided with two arc-shaped limit grooves 61 with the two rotating shafts 21 as the center of the circle, and the two movable rods 23 are respectively penetrated by the arc-shaped limit grooves 61, which provide a limit and guide function for the movement of the movable rod 23. During the rotation of the clamping jaws 2, the movement trajectory of the movable rod 23 is limited within the arc-shaped limit grooves 61, ensuring the accuracy and stability of the movement of the movable rod 23. For the frequent opening and closing operations of the clamping jaws 2, the arc-shaped limit grooves 61 can prevent the movable rod 23 from unnecessary deviation, thereby ensuring that the top-tightening adsorption assembly 3 works in the expected manner, improving the reliability of the entire clamping jaw system, and at the same time, providing a stable structural foundation for the movable rod 23 to push the L-shaped moving seat 32.

[0057] A convex plate 62 is integrally provided on the front side of the lifting plate 6. The convex plate 62 is arranged below the tension spring assembly 1, making the structure of the entire clamping device more compact and the spatial layout between the components reasonable. The L-shaped moving seat 32 is slidably arranged on the upper side of the convex plate 62. A guide groove 63 is longitudinally opened in the middle of the convex plate 62. A rectangular slider 33 is fixed at the bottom of the L-shaped moving seat 32 for sliding with the guide groove 63. The bottom of the rectangular slider 33 is rotatably connected to the connecting rod 31. The guide groove 63 provides precise guidance for the forward and backward sliding of the L-shaped moving seat 32. When the pressing adsorption assembly 3 is working, The sliding direction of the L-shaped movable seat 32 is strictly limited to the direction of the guide slot 63. When the clamping jaws 2 clamp the bottle, the connecting rod 31 pushes the L-shaped movable seat 32 to move forward. The guide slot 63 ensures that the L-shaped movable seat 32 slides in a straight line, so that the suction cup 30 can accurately press and adsorb the bottle. The two V-shaped connecting rods 31 themselves have the function of supporting the L-shaped movable seat 32 and pushing the L-shaped movable seat 32 to move. Therefore, the guide slot 63 of the convex plate 62 can play a dual supporting and guiding role, which improves the stability and accuracy of the subsequent adsorption of the suction cup 30.

[0058] In addition, the electric push rod 8 installed on the mounting base 7 is connected to the lifting plate 6. The extension and retraction of the electric push rod 8 can drive the lifting plate 6 to move up and down, so that the clamping claw 2 can be lifted and lowered as a whole. For the sorting of bottles and cans or the picking and placing operations on multi-layer shelves, the electric push rod 8 can lift or lower the clamping claw to a suitable height as needed. The operator can accurately control the extension and retraction of the electric push rod 8 through the control system to meet the operation requirements of bottles and cans at different heights, and the lifting guide rod 9 runs through both sides of the lifting plate 6 to provide guidance for the lifting and lowering of the lifting plate 6. When working in conjunction with the electric push rod 8, the lifting guide rod 9 ensures that the lifting plate 6 remains stable during the up and down movement to prevent tilting or shaking, which is more important for accurately grasping and placing bottles and cans, especially in automated production lines with high requirements for position accuracy, which can improve the accuracy and efficiency of production.

[0059] The synergistic effect of the above components enables the entire flexible clamp to achieve precise movements when operating bottles and cans. Whether it is the opening and closing elastic clamping of the clamp 2, the tightening and adsorption of the tightening adsorption component 3, or the lifting and lowering of the clamp 2 as a whole, each action can be performed accurately. This accuracy can reduce the damage rate of bottles and cans, improve production quality and efficiency, and has good applicability when performing fine operations on bottles and cans.

[0060] In specific implementation, when it is necessary to clamp the bottle, the electric push rod 8 is started, so that the lifting plate 6 drives the clamping jaws 2 to descend to the appropriate position, and the two clamping jaws 2 are opened under the drive of an external motor or cylinder or other driving source. At this time, the movable rod 23 moves backward along the arc-shaped limit groove 61, and pulls the connecting rod 31 and the L-shaped moving seat 32 to move backward along the guide slide groove 63 until the bottle is located between the upper clamping plate 25 and the lower clamping plate 4 of the two clamping jaws 2. The external motor or cylinder or other driving source stops controlling, and the two clamping jaws 2 begin to rotate relatively and approach the bottle under the action of the tension spring assembly 1. Due to the special connection between the tension spring bolt 102 and the tension spring body 101 in the tension spring assembly 1 and the presence of the elastic pull strip 105, a stable and adjustable elastic clamping force is provided. As the clamping jaws 2 continue to approach, the upper clamping plate 25 and the lower clamping plate 4 and the elastic pull strip 105 are moved backward. The flexible rubber gasket 5 elastically clamps the bottle part, and the movable rod 23 pushes the two V-shaped connecting rods 31 forward at the same time. The connecting rods 31 drive the L-shaped movable seat 32 to slide forward, so that the suction cup 30 on the mounting top plate 34 is elastically pressed against the rear side of the bottle through the buffer spring 37 to avoid excessive force. Due to the existence of the universal rotating ball head 35, the suction cup 30 can automatically adjust the adsorption angle according to the shape of the bottle. For example, for the curved side of the bottle, the suction cup 30 can fit well and adsorb the rear side of the bottle under the operation of the external suction pump, so as to achieve stable and efficient elastic clamping of the can body. After the clamping work is completed, the two clamping claws 2 open the bottle part. At this time, under the action of the elastic rubber ring 322, it is ensured that the suction cup 30 can automatically reset after leaving the bottle, and keep the forward state, which is convenient for the clamping operation on the next side.

[0061] It should be noted that the present invention mainly improves the above-mentioned structure, and the functions, components and structures not mentioned therein can be implemented by using components and structures in the prior art that can realize corresponding functions.

[0062] The present invention has been described in detail above through specific embodiments, but these do not constitute limitations of the present invention. Without departing from the principle of the present invention, those skilled in the art may also make many variations and improvements, which should also be considered as the protection scope of the present invention.

Claims

1. A flexible clamping claw, characterized in that: The invention comprises a tension spring assembly (1), wherein the tension spring assembly (1) is composed of a tension spring body (101) and two tension spring bolts (102), wherein the external threads of the two tension spring bolts (102) can be screwed in from the inner sides of both ends of the tension spring body (101) and tightened with the pitch threads of the tension spring body (101); The outer ends of the two tension spring bolts (102) are integrally fixed with an external connection head (103); The two tension spring bolts (102) are each locked with an inner locking piece (104) on one side opposite to the other, and the two inner locking pieces (104) are each locked with a plurality of elastic pull strips (105) on one side opposite to the other, and the elastic pull strips (105) are arranged on the inner side of the tension spring body (101); It also comprises two clamping jaws (2) arranged to rotate relative to each other, the rear ends of the two clamping jaws (2) are both provided with a rotating shaft (21), and the rear ends of the two clamping jaws (2) are fixedly provided with a transmission convex tooth (22) on opposite sides, and the middle parts of the two clamping jaws (2) are provided with a tension spring groove (24) on opposite sides for clamping the two sides of the tension spring body (101), and two tension spring bolts (102) are inserted from the outside of the clamping jaws (2) and clamped in the tension spring groove (24), and the two ends of the tension spring body (101) are locked on the two tension spring grooves (24), and the front ends of the two clamping jaws (2) are respectively fixedly provided with an upper clamping plate (25) for clamping the bottle and can parts; A tightening and adsorption assembly (3) is movably provided between the upper clamping plate (25) and the tension spring assembly (1) for tightening and adsorbing one side of the bottle or can; A movable rod (23) is respectively installed vertically and rotatably in the middle of the two clamping jaws (2), and the bottoms of the two movable rods (23) are connected to the tightening adsorption assembly (3) to control the forward and backward movable displacement of the tightening adsorption assembly (3); A lower clamping plate (4) is movably arranged below the upper clamping plate (25), and a vertical guide rod (41) and an adjusting screw (42) are arranged through the lower clamping plate (4), wherein the adjusting screw (42) is threadedly connected to the lower clamping plate (4), and the vertical guide rod (41) and the adjusting screw (42) are both rotatably mounted on the bottom of the upper clamping plate (25).

2. A flexible clamp according to claim 1, characterized in that: One side of the upper clamping plate (25) and the lower clamping plate (4) is locked with an elastic rubber gasket (5) for elastically clamping the bottle member.

3. A flexible clamp according to claim 2, characterized in that: The tightening adsorption assembly (3) comprises a suction cup (30) arranged toward the front, a connecting tube (301) integrally arranged at the rear side of the suction cup (30), and two connecting rods (31) rotatably connected to the bottom ends of the two movable rods (23), the other ends of the two connecting rods (31) are rotatably connected in a V-shape, and the upper side is connected to an L-shaped movable seat (32), the upper side of the L-shaped movable seat (32) is slidably connected to a mounting top plate (34) in a forward and backward manner, the suction cup (30) is arranged at the front side of the mounting top plate (34), and the connecting tube (301) is installed through the middle part of the mounting top plate (34), a plurality of sliding guide rods (36) are longitudinally installed at the rear side of the mounting top plate (34), each of the sliding guide rods (36) is installed through the L-shaped movable seat (32), and a buffer spring (37) is sleeved on the sliding guide rod (36), and the buffer spring (37) is elastically supported between the mounting top plate (34) and the L-shaped movable seat (32).

4. A flexible clamp according to claim 3, characterized in that: A universal rotating ball head (35) is installed in the middle of the mounting top plate (34), and the connecting pipe (301) is installed by passing through the middle of the universal rotating ball head (35).

5. A flexible clamp according to claim 3, characterized in that: An inner movable groove (321) for the connection tube (301) to move is provided in the middle of the L-shaped movable seat (32), and an elastic rubber ring (322) is fixedly provided inside the movable groove (321), and the connection tube (301) passes through the middle of the elastic rubber ring (322).

6. A flexible clamp according to claim 5, characterized in that: The invention comprises a lifting plate (6) for rotatably mounting two clamping claws (2), the lifting plate (6) being provided with two arc-shaped limit grooves (61) respectively with two rotating shafts (21) as the center, the two movable rods (23) being respectively penetrated by the arc-shaped limit grooves (61), the front side of the lifting plate (6) being integrally provided with a convex plate (62), the convex plate (62) being arranged below the tension spring assembly (1), the L-shaped movable seat (32) being slidably arranged on the upper side of the convex plate (62), the middle part of the convex plate (62) being longitudinally provided with a guide groove (63), the bottom of the L-shaped movable seat (32) being fixedly provided with a rectangular sliding block (33) for slidingly matching with the guide sliding block (63), the bottom of the rectangular sliding block (33) being rotatably connected with the connecting rod (31) axis.

7. A flexible clamp according to claim 6, characterized in that: A mounting base (7) is installed below the lifting plate (6), and a plurality of electric push rods (8) and lifting guide rods (9) are installed on the mounting base (7). The telescopic ends of the electric push rods (8) are locked and connected to the lifting plate (6), and the lifting guide rods (9) are arranged to pass through both sides of the lifting plate (6).

Images