Full-hinge type clamping mechanism with buffering function

Abstract

The invention provides a full-hinge type clamping mechanism with a buffering function, and belongs to the technical field of clamping equipment. The bearing clamping device solves the problem that a bearing is prone to being damaged by existing clamping equipment. The invention discloses a full-hinge type clamping mechanism with a buffering function. The full-hinge type clamping mechanism comprises a bottom plate, a left clamping jaw, a right clamping jaw, a buffering plate, a buffering block, a cylinder body and a hinge assembly. According to the invention, when the left clamping jaw and the right clamping jaw are in an open state and are buffered by the buffer block, the rotating speeds of the left clamping jaw and the right clamping jaw are slowed down, and meanwhile, the moving speeds of the piston rod and the piston head are slowed down, so that the impact force of the piston head on the cylinder body is reduced; besides, when the left clamping jaw and the right clamping jaw are closed, the buffer plate can buffer the left clamping jaw and the right clamping jaw, so that the joint of the left clamping jaw and the rotating shaft, the joint of the right clamping jaw and the rotating shaft and the upper bearing can be better protected, meanwhile, the cylinder body can be better protected, and the service life of the cylinder body is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of clamping equipment and relates to a fully hinged clamping mechanism with a buffering function. Background Art

[0002] With the rapid development of pneumatic transmission technology, many manufacturing industries such as the automotive manufacturing industry, packaging industry, and machine tool industry have increasingly higher requirements for the long life and stability of pneumatic actuators such as cylinders and air grippers. During the opening process of the pivot-type air gripper, after the cylinder piston is in place, the air gripper fingers open by inertia, and at this time the angular velocity of the air gripper fingers is very fast. The weight of the air gripper fingers is large, which will cause a huge impact. The impact force first hits the bearings at the joints. After frequent use, the bearings are easily damaged, causing the air gripper to fail to work properly. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the prior art and to propose a fully hinged clamping mechanism that can protect the bearing and has a buffering function.

[0004] The object of the present invention can be achieved through the following technical solutions: A fully hinged clamping mechanism with a buffering function, comprising: A bottom plate, a left clamping claw and a right clamping claw are installed on one surface of the bottom plate, the left clamping claw and the right clamping claw can rotate relative to the bottom plate, and a buffer plate is installed on a side surface of the left clamping claw facing the right clamping claw; A buffer block is arranged on the base plate, and the buffer block is located between the left clamping claw and the right clamping claw. A cylinder body for driving the left clamping claw and the right clamping claw to rotate is arranged on the other side of the base plate, and the cylinder body and the left clamping claw as well as the cylinder body and the right clamping claw are connected by a hinge assembly.

[0005] In the above-mentioned fully hinged clamping mechanism with buffering function, a pair of rotating shafts are movably installed on the bottom plate, one of which is connected to the left clamping claw, and the other is connected to the right clamping claw, and the rotating shafts are hinged to the hinge assembly.

[0006] In the above-mentioned fully hinged clamping mechanism with buffering function, the buffer block is located on the connecting line of the two rotating shafts, and one end of the left clamping claw and one end of the right clamping claw are both provided with a protrusion for contacting the buffer block.

[0007] In the above-mentioned fully hinged clamping mechanism with buffering function, a piston rod is movably mounted on the cylinder body, a piston head is provided at one end of the piston rod, and a driving block is provided at the other end of the piston rod. The piston head is located in the cylinder body, and driving ears for connecting the hinge assembly are provided on both sides of the driving block.

[0008] In the above-mentioned fully hinged clamping mechanism with buffering function, the hinge assembly includes a connecting plate and a shift plate, one end of the shift plate is fixedly connected to the rotating shaft, the other end of the shift plate is hinged to one end of the connecting plate through a first axis, and the other end of the connecting plate is hinged to the adjacent driving ear through a second axis.

[0009] In the above-mentioned fully hinged clamping mechanism with buffering function, a latching key is provided on the rotating shaft, and a key slot for latching the latching key is provided on the left clamping claw and the right clamping claw.

[0010] In the above-mentioned fully hinged clamping mechanism with buffering function, an upper bearing is installed between the base plate and the rotating shaft, a sealing cover is provided on the base plate, the hinge assembly is located in the sealing cover, a lower bearing for connecting the rotating shaft is provided in the sealing cover, and the piston rod is movably inserted into the sealing cover.

[0011] In the above-mentioned fully hinged clamping mechanism with buffering function, the torque calculation formula of the rotating shaft is: M = [0.5F / cos(a)] × R × sin(b); Where, M is the torque of the rotating shaft; F is the thrust of the cylinder; a is the angle between the piston rod and the connecting plate; b is the angle between the connecting plate and the shifting plate; R is the length between the rotation axis and the first shaft body.

[0012] In the above-mentioned fully hinged clamping mechanism with buffering function, a plurality of mounting grooves are provided on the buffering plate, and a bolt for connecting the left clamping claw is provided in each of the mounting grooves.

[0013] In the above-mentioned fully hinged clamping mechanism with buffering function, the buffer plate is provided with multiple clamping holes, the side surface of the right clamping claw facing the buffer plate is provided with a first protrusion corresponding to the clamping hole, and the right clamping claw is also provided with a second protrusion corresponding to the mounting groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, when the left claw and the right claw are in the open state and after being buffered by the buffer block, the rotation speed of the left claw and the right claw will slow down. At the same time, the movement speed of the piston rod and the piston head will also slow down, so that the impact force of the piston head on the cylinder body is reduced, and when the piston head abuts against one end of the cylinder body close to the driving head, the cylinder body stops working, and at this time, the left claw and the right claw stop opening; in addition, when the left claw and the right claw are closed, the buffer plate will buffer the left claw and the right claw, so that not only can the connection between the left claw and the rotating shaft, the connection between the right claw and the rotating shaft and the upper bearing be better protected, but also the cylinder body can be better protected and the service life of the cylinder body can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure from another perspective after removing the sealing cover.

[0017] Figure 3 It is a structural schematic diagram of the left clamping claw.

[0018] Figure 4 It is a schematic diagram of the structure of the right claw.

[0019] Figure 5 It is a structural diagram of the cylinder body.

[0020] Figure 6 yes Figure 5 Section view at AA.

[0021] Figure 7 It is a schematic diagram of the structure for calculating the torque of a rotating shaft.

[0022] In the figure, a base plate 100, a buffer block 110, a rotating shaft 120, a key 121, an upper bearing 122, a lower bearing 123, a sealing ring 124, a sealing cover 130, a left claw 200, a buffer plate 210, a mounting groove 211, a bolt 211a, a clamping hole 212, a protrusion 220, a keyway 230, a right claw 300, a first protrusion 310, a second protrusion 320, a cylinder body 400, a piston rod 410, a piston head 420, a driving block 430, a driving ear 431, a hinge assembly 500, a connecting plate 510, a second shaft 511, a shift plate 520, and a first shaft 521. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] like Figure 1 — Figure 7As shown, a fully hinged clamping mechanism with a buffering function of the present invention includes a base plate 100 , a left clamping claw 200 , a right clamping claw 300 , a buffer plate 210 , a buffer block 110 , a cylinder body 400 and a hinge assembly 500 .

[0025] A left claw 200 and a right claw 300 are installed on one side of the bottom plate 100, and both the left claw 200 and the right claw 300 can rotate relative to the bottom plate 100. A buffer plate 210 is installed on the side of the left claw 200 facing the right claw 300; a buffer block 110 is arranged on the bottom plate 100, and the buffer block 110 is located between the left claw 200 and the right claw 300. A cylinder body 400 for driving the left claw 200 and the right claw 300 to rotate is provided on the other side of the bottom plate 100, and the cylinder body 400 and the left claw 200 as well as the cylinder body 400 and the right claw 300 are connected by a hinge assembly 500. A pair of rotating shafts 120 are movably mounted on the hinge assembly 100, one of which is connected to the left claw 200, and the other is connected to the right claw 300. The rotating shaft 120 is hinged to the hinge assembly 500, and the buffer block 110 is located on the connecting line of the two rotating shafts 120. One end of the left claw 200 and one end of the right claw 300 are both provided with a convex block 220 for contacting the buffer block 110. When the cylinder body 400 drives the hinge assembly 500 to move, the two hinge assemblies 500 will simultaneously drive the left claw 200 and the right claw 300 to close or close. When the left claw 200 and the right claw 300 are opened to a predetermined position, the left claw 200 and the right claw 300 are closed. When the cylinder 400 stops working and the rotating shaft 120 stops rotating, the buffer block 110 will buffer the left and right clamping jaws 200 and 300, so as to avoid the left and right clamping jaws 200 and 300 from generating stress between the left clamping jaw 200 and the corresponding rotating shaft 120, and between the right clamping jaw 300 and the corresponding rotating shaft 120 during the opening process of the left and right clamping jaws 200 and 300 due to inertia, thereby reducing the left clamping jaw 200. 0, the wear of the right claw 300 and the rotating shaft 120; when the left claw 200 and the right claw 300 are closed, because there is a buffer plate 210 between the left claw 200 and the right claw 300, the buffer plate 210 can buffer the impact force between the left claw 200 and the right claw 300, so that the left claw 200 and the right claw 300 can be better protected; secondly, the clamping mechanism of the present invention adopts a hinge assembly 500 to drive the left claw 200 and the right claw 300 to rotate synchronously, so as to avoid the cylinder body 400 directly driving the left claw 200 and the right claw 300 to rotate, thereby improving the stability of the left claw 200 and the right claw 300 during the rotation process.

[0026] A piston rod 410 is movably mounted on the cylinder body 400, one end of the piston rod 410 is provided with a piston head 420, the other end of the piston rod 410 is provided with a driving block 430, the piston head 420 is located in the cylinder body 400, both sides of the driving block 430 are provided with driving ears 431 for connecting the hinge assembly 500, the hinge assembly 500 includes a connecting plate 510 and a dial plate 520, one end of the dial plate 520 is fixedly connected to the rotating shaft 120, the other end of the dial plate 520 is hinged to one end of the connecting plate 510 through a first shaft body 521, and the other end of the connecting plate 510 is hinged to the adjacent driving ear 431 through a second shaft body 511. When the cylinder body 400 drives the piston rod 410 to be pushed outward, the driving ear 431 on the driving block 430 and the connecting plate 51 0 is hinged by the second shaft body 511, the connecting plate 510 and the dial plate 520 are hinged by the first shaft body 521, and the dial plate 520 is fixedly connected to the rotating shaft 120. In this way, the driving block 430 will drive the connecting plate 510 to move, and at the same time, the connecting plate 510 will drive the dial plate 520 and the rotating shaft 120 to rotate, so that the rotating shaft 120 drives the left claw 200 or the right claw 300 to rotate; further, because the connecting plate 510 and the driving ear 431 are hinged by the second shaft body 511, and the connecting plate 510 and the dial plate 520 are hinged by the first shaft body 521, stress can be avoided between the connecting plate 510 and the driving ear 431 and between the connecting plate 510 and the dial plate 520, ensuring that the dial plate 520 and the rotating shaft 120 can smoothly rotate around the central axis of the rotating shaft 120.

[0027] Furthermore, the torque calculation formula of the rotating shaft 120 is: M = [0.5F / cos(a)]×R×sin(b); In the above formula, M is the torque of the rotating shaft 120; F is the thrust of the cylinder 400; a is the angle between the piston rod 410 and the connecting plate 510; b is the angle between the connecting plate 510 and the paddle plate 520; R is the length between the rotating shaft 120 and the first shaft body 521, wherein, when the cylinder 400 is selected, the thrust F of the cylinder 400 is constant, and when the clamping mechanism is assembled, the length R between the rotating shaft 120 and the first shaft body 521 remains unchanged. Therefore, in the above formula, the only thing that can be changed is the values ​​of the angles a and b. In the present invention, it has been experimentally measured that when the angle a reaches 68.829° and the angle b reaches 64.692°, the torque of the rotating shaft 120 reaches a maximum, that is, the clamping force between the left clamping jaw 200 and the right clamping jaw 300 reaches a maximum at this time, that is, the clamping force of the left clamping jaw 200 and the right clamping jaw 300 on the object reaches a maximum.

[0028] A latching key 121 is provided on the rotating shaft 120, and a key slot 230 for latching the latching key 121 is provided on the left claw 200 and the right claw 300. When the left claw 200 and the right claw 300 are respectively connected to the corresponding rotating shaft 120, the latching key 121 needs to be latched into the corresponding key slot 230 to ensure that when the rotating shaft 120 rotates, the rotating shaft 120 can drive the corresponding left claw 200 or right claw 300 to rotate.

[0029] A sealing cover 130 is provided on the base plate 100, the hinge assembly 500 is located in the sealing cover 130, the piston rod 410 is movably inserted into the sealing cover 130, and a sealing ring 124 is sleeved on the rotating shaft 120, one sealing ring 124 is located between the left claw 200 and the base plate 100, and the other sealing ring 124 is located between the right claw 300 and the base plate 100. In this way, the hinge assembly 500, the portion of the piston rod 410 extending into the sealing cover 130, the driving block 430, and the portion of the rotating shaft 120 located below the base plate 100 can all be sealed to prevent external dust or solid particles from affecting the clamping mechanism.

[0030] A lower bearing 123 for connecting the rotating shaft 120 is provided in the sealing cover 130, and an upper bearing 122 is installed between the bottom plate 100 and the rotating shaft 120. The upper bearing 122 and the lower bearing 123 cooperate with each other to enable the rotating shaft 120 to rotate relative to the bottom plate 100 and the sealing cover 130. Furthermore, when the left clamping claw 200 and the right clamping claw 300 are in an open state and the left clamping claw 200 and the right clamping claw 300 are buffered by the buffer block 110, the rotation speed of the left clamping claw 200 and the right clamping claw 300 will slow down. At the same time, the piston rod The movement speed of 410 and the piston head 420 will also slow down, so that the impact force between the piston head 420 and the cylinder body 400 is reduced, and when the piston head 420 is against the end of the cylinder body 400 close to the driving head, the cylinder body 400 stops working. At this time, the left claw 200 and the right claw 300 stop opening. In this way, not only can the connection between the left claw 200 and the rotating shaft 120, the connection between the right claw 300 and the rotating shaft 120 and the upper bearing 122 be better protected, but also the cylinder body 400 can be better protected and the service life of the cylinder body 400 can be extended.

[0031] The buffer plate 210 is provided with a plurality of mounting grooves 211, each of which is provided with a bolt 211a for connecting the left clamping claw 200, and the buffer plate 210 is provided with a plurality of clamping holes 212. The right clamping claw 300 is provided with a first protrusion 310 corresponding to the clamping hole 212 on one side facing the buffer plate 210, and the right clamping claw 300 is also provided with a second protrusion 320 corresponding to the mounting groove 211. When people place a nylon bag or a woven bag between the buffer plate 210 and the right clamping claw 300, and control the left clamping claw 200 and the right clamping claw 300 to close, the first protrusion 310 is provided on the side of the right clamping claw 300 facing the buffer plate 210, and the second protrusion 320 is provided on the right clamping claw 300. The protrusion 310 will be inserted into the corresponding clamping hole 212, and the second protrusion 320 will be inserted into the corresponding installation groove 211. At this time, the nylon bag and the woven bag are always located between the buffer plate 210 and the right clamping claw 300. In this way, the clamping effect of the clamping mechanism on the nylon bag or the woven bag can be effectively improved; further, when people install the buffer plate 210 on the left clamping claw 200 through multiple bolts 211a, the head of the bolt 211a is located at the bottom of the installation groove 211. Therefore, the bolt 211a does not affect the second protrusion 320 from being embedded in the installation groove 211.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A fully hinged clamping mechanism with a buffering function, characterized in that: include: A bottom plate, a left clamping claw and a right clamping claw are installed on one surface of the bottom plate, the left clamping claw and the right clamping claw can rotate relative to the bottom plate, and a buffer plate is installed on a side surface of the left clamping claw facing the right clamping claw; A buffer block is arranged on the base plate, and the buffer block is located between the left clamping claw and the right clamping claw. A cylinder body for driving the left clamping claw and the right clamping claw to rotate is arranged on the other side of the base plate, and the cylinder body and the left clamping claw as well as the cylinder body and the right clamping claw are connected by a hinge assembly.

2. A fully hinged clamping mechanism with a buffering function according to claim 1, characterized in that: A pair of rotating shafts are movably mounted on the bottom plate, one of which is connected to the left clamping claw, and the other is connected to the right clamping claw, and the rotating shafts are hinged to the hinge assembly.

3. A fully hinged clamping mechanism with a buffering function according to claim 2, characterized in that: The buffer block is located on the connecting line of the two rotating shafts, and one end of the left clamping claw and one end of the right clamping claw are both provided with a protrusion for contacting the buffer block.

4. A fully hinged clamping mechanism with a buffering function according to claim 2, characterized in that: A piston rod is movably mounted on the cylinder body, a piston head is arranged at one end of the piston rod, a driving block is arranged at the other end of the piston rod, the piston head is located in the cylinder body, and driving ears for connecting the hinge assembly are arranged on both sides of the driving block.

5. A fully hinged clamping mechanism with a buffering function according to claim 4, characterized in that: The hinge assembly includes a connecting plate and a shifting plate, one end of the shifting plate is fixedly connected to the rotating shaft, the other end of the shifting plate is hinged to one end of the connecting plate through a first shaft, and the other end of the connecting plate is hinged to an adjacent driving ear through a second shaft.

6. A fully hinged clamping mechanism with a buffering function according to claim 2, characterized in that: The rotating shaft is provided with a clamping key, and the left clamping claw and the right clamping claw are provided with a keyway for clamping the clamping key.

7. A fully hinged clamping mechanism with a buffering function according to claim 4, characterized in that: An upper bearing is installed between the bottom plate and the rotating shaft, a sealing cover is arranged on the bottom plate, the hinge assembly is located in the sealing cover, a lower bearing for connecting the rotating shaft is arranged in the sealing cover, and the piston rod is movably inserted into the sealing cover.

8. The fully hinged clamping mechanism with a buffering function according to claim 5, characterized in that: The torque calculation formula of the rotating shaft is: M = [0.5F / cos(a)]×R×sin(b); Where, M is the torque of the rotating shaft; F is the thrust of the cylinder; a is the angle between the piston rod and the connecting plate; b is the angle between the connecting plate and the shifting plate; R is the length between the rotation axis and the first shaft body.

9. The fully hinged clamping mechanism with a buffering function according to claim 1, characterized in that: The buffer plate is provided with a plurality of mounting grooves, and each of the mounting grooves is provided with a bolt for connecting the left claw.

10. A fully hinged clamping mechanism with a buffering function according to claim 9, characterized in that: The buffer plate is provided with a plurality of clamping holes, a side surface of the right clamping claw facing the buffer plate is provided with a first protrusion corresponding to the clamping hole, and the right clamping claw is also provided with a second protrusion corresponding to the mounting groove.

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