Mechanical claw

Abstract

The utility model relates to a mechanical gripper. The use stability of an existing mechanical claw is poor. The grabbing mechanism comprises a driving part and a grabbing part, the driving part and the grabbing part are fixedly connected through a fixing plate, a telescopic driving rod is arranged in the driving part, and the driving rod drives the grabbing part to be switched between an opening state and a clamping state in an opening and closing mode through a transmission assembly. The grabbing part is fixedly connected with the driving part through the fixing plate and plays a role in supporting and fixing the grabbing part, the driving part drives the grabbing part to act through the transmission assembly connected with the driving rod and plays a role in driving the grabbing part, supporting, fixing and opening and closing action control of the grabbing part are achieved through the fixing plate and the transmission assembly, acting force is effectively dispersed, and the grabbing effect is improved. The situation that the grabbing part is loosened due to frequent opening and closing can be effectively reduced, it is ensured that the grabbing part can stably and accurately act for a long time, the use reliability is improved, the maintenance cost is reduced, the service life is prolonged, and the use experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of plastic processing, concretely relates to a mechanical claw. BACKGROUND

[0002] The existing bottle blowing machine is provided with a conveying mechanism for transferring bottle blanks, and the conveying mechanism is provided with a mechanical claw capable of opening and closing to grab the bottle blanks. The mechanical claw can be switched between the open state and the clamping state to realize the taking, placing and transferring of the bottle blanks. The existing mechanical claw comprises a driving part and a grabbing part. The driving part is provided with a telescopic driving rod. The grabbing part comprises two cross-shaped grabbing plates. The inner end of the grabbing plate is rotatably connected to the driving part. The middle part of the grabbing plate is cross-shaped and rotatably connected to the end of the driving rod. The outer end of the grabbing plate can open and close to grab the bottle blanks. The driving rod drives the middle part of the grabbing plate to move through telescopic driving, so that the outer end of the grabbing plate can be switched between the open state and the clamping state. The driving rod not only drives the grabbing plate, but also supports the grabbing plate. As a result, the driving rod and the grabbing plate will be loose and shake due to long-term application of multiple forces. This shortens the service life of the mechanical claw, increases the maintenance cost, and affects the clamping force and accuracy due to the increased assembly gap between the grabbing plate and the driving rod. This leads to the offset or jamming of the bottle blanks due to poor movement accuracy, reduces the production efficiency of the bottle blowing machine, and affects the user experience. SUMMARY

[0003] In order to solve the problems of the prior art, the utility model provides a mechanical claw. The fixed plate and the driving rod are arranged to support and position the grabbing part and drive the grabbing part to move, respectively. This ensures that the grabbing part can maintain good movement accuracy and clamping force after frequent opening and closing, ensures the long-term stable operation of the mechanical claw, reduces the maintenance cost, improves the use reliability, and improves the user experience.

[0004] The utility model realizes the following mode: a mechanical claw comprises a driving part and a grabbing part. The driving part and the grabbing part are fixedly connected through a fixed plate. The driving part is provided with a telescopic driving rod. The driving rod drives the grabbing part to switch between the open state and the clamping state through a transmission assembly. The grabbing part is fixedly connected to the driving part through the fixed plate to support and fix the grabbing part. The driving part drives the grabbing part to move through the transmission assembly connected to the driving rod to drive the grabbing part. The fixed plate and the transmission assembly are used to support and fix the grabbing part and control the opening and closing movement of the grabbing part, respectively. This effectively disperses the force, effectively reduces the looseness of the grabbing part caused by frequent opening and closing, ensures the long-term stable and accurate movement of the grabbing part, improves the use reliability, reduces the maintenance cost, prolongs the service life, and improves the user experience.

[0005] As preferred, the grabbing part comprises two symmetrically arranged grabbing plates, and the connecting ends of the grabbing plates are rotatably installed on the outer end of the fixed plate through a rotating shaft, so that the grabbing part can be switched between an open state in which the clamping ends of the grabbing plates are separated from each other and a clamping state in which the clamping ends of the grabbing plates are close to each other. The grabbing plates are symmetrically arranged and are driven by the driving rods to ensure that the grabbing plates can mirror each other and accurately switch between the open state and the clamping state, and also ensure that the two grabbing plates are uniformly stressed to prevent the grabbing plates from being worn and loosened due to uneven stress, thereby effectively prolonging the service life. The connecting ends of the grabbing plates are stacked and connected to the fixed plate through the same rotating shaft, which ensures that the grabbing plates can swing around the rotating shaft.

[0006] As preferred, the vertical projection of the grabbing plate is C-shaped, and the grabbing plate is provided with a groove in the middle. When the grabbing part is switched to the clamping state, the grooves are close to each other and wrap the clamping object. The C-shaped grabbing plate has a large distance between the connecting end and the swinging end, thereby effectively wrapping and clamping the bottle blank by increasing the coverage area when the grabbing plate swings, and also forming a clamping groove for clamping the bottle blank by bending in the middle to provide space for accommodating the bottle blank and improve the reliability of grabbing.

[0007] As preferred, the groove is fixed with a clamping block, one side of the clamping block is fixedly connected with the groove wall, and the other side forms a clamping surface matched with the corresponding area of the clamping object. The clamping block is provided with a mounting hole, and the fastener passes through the mounting hole and is screwed and locked with the grabbing plate, so that the clamping block can be detachably installed in the groove. One side edge of the clamping block can be matched with the groove wall, and the other side edge can be matched with the side wall of the bottle blank, which ensures that the grabbing plate can clamp the bottle blank through the clamping block, and also facilitates the replacement of the clamping block to enable the mechanical claw to match various bottle blanks, thereby expanding the use range and improving the use experience.

[0008] As preferred, when the grabbing part is in the open state, the clamping end of the grabbing plate is located on the same straight line as the rotating shaft, so that the grabbing part is opened and avoids forming a transfer channel for the clamping object to move. The connecting end and the swinging end of the grabbing plate are located on the same straight line, and the transfer channels are arranged in parallel, so that the bottle blank does not come into contact with the grabbing part in the open state when moving along the transfer channel, and the bottle blank can move away from the grabbing part along the transfer channel, thereby facilitating the smooth transfer and handover of the bottle blank in cooperation with the corresponding mechanism.

[0009] As preferred, the transmission assembly comprises a linkage plate and a connecting rod, the middle part of the linkage plate is fixedly connected with the outer end of the driving rod, and the two end parts are rotatably connected with the middle part of the corresponding grabbing plate through the connecting rod, so that the linkage plate driven by the driving rod synchronously extends and retracts to drive the grabbing plate to swing through the connecting rod. The driving rod drives the two connecting rods to move through the linkage plate, so that the grabbing plates realize synchronous mirror motion to ensure that the bottle blank can be accurately taken and placed.

[0010] As preferred, the two ends of the connecting rod are rotatably connected to the grab plate and the linkage plate respectively. The two ends of the connecting rod are rotatably connected to the middle of the grab plate and the short end of the linkage plate, one end of the connecting rod moves along the axis of the driving rod with the linkage plate, and the other end swings with the grab plate as the center of the rotating shaft, so that the connecting rod can eliminate the deviation of the two ends due to different motion trajectories by adjusting its own posture, and then ensure that the grab plate can swing accurately and grasp the bottle blank.

[0011] As preferred, the driving part is a gas cylinder or an oil cylinder with a driving rod, and the telescopic rod of the gas cylinder or the oil cylinder forms the driving rod, which is used to drive the grabbing part to switch between the open state and the clamping state.

[0012] As preferred, the fixed plate is two and is fixed to the top and bottom of the end edge of the driving part in parallel, the rotating shaft end is inserted and connected to the corresponding fixed plate, and the movable space for accommodating the driving rod and the transmission assembly is formed between the fixed plates. The fixed plate is two, which can not only improve the positioning effect of the grabbing part by increasing the number of fixed plates, but also provide a movable space for the driving rod and the transmission assembly, thereby playing a protection role.

[0013] As preferred, the fixed plate is T-shaped, including a horizontal part abutting the end edge of the fixed part and a vertical part vertically arranged in the center of the horizontal part, and the rotating shaft is arranged at the end of the vertical part away from the horizontal part. The corresponding horizontal parts and the corresponding vertical parts of the fixed plate are fixedly connected by connecting rods, so that the relative positions between the fixed plates are fixed. The center of the horizontal part reserves a mounting space for the driving rod, and the vertical part is arranged to increase the distance between the grabbing part and the driving part, thereby providing a telescopic space for the driving rod to facilitate the driving of the grabbing part.

[0014] As preferred, the horizontal part of the fixed plate is provided with a limiting block between the corresponding end edges, and the linkage plate can abut against the corresponding limiting block through the two end parts when the grabbing part switches to the open state, so as to ensure that the linkage plate is perpendicular to the axis of the driving rod, and then ensure that the two grab plates are opened in mirror image and avoid the transfer channel.

[0015] The utility model discloses the beneficial effect: the grabbing part is fixed with the driving part through the fixed plate, and the grabbing part is supported and fixed, the driving part drives the grabbing part to act through the transmission assembly connected with the driving rod, and the grabbing part is driven, the fixed plate and the transmission assembly realize the support and fixed of grabbing part and the open and close action control respectively, effectively disperses the acting force, can effectively reduce the relaxation of the grabbing part due to the frequent open and close, ensures that the grabbing part can long -term stable accurate action, improves the use reliability, also reduces the maintenance cost, prolongs the life, improves the use experience. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view when the mechanical claw is in the open state.

[0017] Figure 2 Fig. 2 is a schematic diagram of the mechanism when the mechanical claw is in the clamping state;

[0018] Figure 3 Fig. 3 is a schematic diagram of the cross-sectional structure when the mechanical claw is in the open state;

[0019] Figure 4 Fig. 4 is a schematic diagram of the cross-sectional structure when the mechanical claw is in the open clamping state;

[0020] In the figure: 1, driving part, 2, grabbing part, 3, fixed plate, 4, transmission assembly, 5, driving rod, 6, grabbing plate, 7, rotating shaft, 8, clamping block, 9, linkage plate, 10, connecting rod. DETAILED DESCRIPTION

[0021] The essential features of the utility model will be further described below in combination with the drawings and specific embodiments.

[0022] As shown in Figure 1 and 2 A kind of mechanical claw, by driving part 1 and grabbing part 2, the driving part 1 and grabbing part 2 are fixedly connected by fixed plate 3, the driving part 1 is equipped with telescopic driving rod 5, the driving rod 5 is driven by transmission assembly 4 and makes the grabbing part 2 open and close switching between open state and clamping state. Grabbing part 2 is fixedly connected with driving part 1 by fixed plate 3, driving part 1 drives grabbing part 2 to act by transmission assembly 4 connected with driving rod 5, using fixed plate 3 and transmission assembly 4 respectively to support fixed and drive grabbing part 2, effectively disperses support force and driving force, both can effectively reduce the relaxation of grabbing part 2 due to frequent opening and closing, ensure that grabbing part 2 can long-term stable accurate action, improve use reliability, also reduce maintenance cost, prolong service life, improve use experience.

[0023] In actual operation, the grabbing part 2 includes two symmetrically arranged grabbing plates 6, the connecting ends of the grabbing plates 6 are rotatably installed on the outer end portions of the fixed plate 3 through the rotating shafts 7, so that the grabbing part 2 can be switched between the open state in which the clamping ends of the grabbing plates 6 are separated from each other and the clamping state in which the clamping ends of the grabbing plates 6 are close to each other. The connecting ends of the grabbing plates 6 are overlapped with each other and are rotatably connected to the outer end portions of the fixed plate 3 through the rotating shafts 7, the inner end portions of the fixed plate 3 are fixedly connected to the driving part 1, the relative positions between the rotating shafts 7 and the driving part 1 are fixedly ensured, and the driving rods 5 on the driving part 1 are connected with the grabbing plates 6 through the transmission assemblies 4. The driving part 1 is connected with the grabbing plates 6 through the fixed plate 3, which plays a positioning role on the grabbing part 2, and the driving part 1 is connected with the grabbing plates 6 through the transmission assemblies 4, which plays a driving role on the grabbing part 2, so as to ensure that the grabbing part 2 can be switched between the open state and the clamping state under the action of the driving part 1. Since the position of the grabbing part 2 and the state switching are realized by different components, the relative positions between the grabbing part 2 and the driving part 1 are fixedly ensured, the loosening of the grabbing part 2 due to repeated state switching is effectively prevented, the action accuracy of the grabbing part 2 is ensured, the bottle blank taking and placing accuracy is improved, the reduction of the action accuracy of the grabbing plates 6 due to the loosening between the adjacent components in the transmission assembly 4 is prevented, the transmission assembly 4 can effectively drive the action of the grabbing part 2, the requirement for the action accuracy of the transmission assembly 4 is reduced, and the service life is prolonged.

[0024] In actual operation, the grabbing part 2 can be switched between the open state and the clamping state under the driving of the driving part 1. When the grabbing part 2 is in the open state (as shown in Figure 3 The clamping ends of the grabbing plates 6 are located on the same straight line as the rotating shafts 7, so that the grabbing part 2 is opened and avoids forming a transfer channel for the clamping object to move, the grabbing part 2 can move along a path parallel to the transfer channel, and the grabbing plates 6 can move relative to the bottle blank without affecting the transfer of the bottle blank. Figure 4 When the grabbing part 2 is in the clamping state (as shown in

[0025] In actual operation, the transmission assembly 4 includes a linkage plate 9 and a connecting rod 10, the middle part of the linkage plate 9 is vertically fixed to the outer end of the driving rod 5, and the two end parts are rotationally connected to the middle part of the corresponding grab plate 6 through the connecting rod 10, so that the linkage plate 9 synchronously extending and retracting with the driving rod 5 drives the grab plate 6 to swing through the connecting rod 10. When the grabbing part 2 is switched from the open state to the clamping state, the driving rod 5 on the driving part 1 extends outward and pushes the connecting rod 10 through the linkage plate 9, so that the connecting rod 10 drives the grab plate 6 to swing towards the center of the rotation shaft 7, thereby achieving the purpose of clamping the grabbed bottle blank. When the grabbing part 2 is switched from the clamping state to the open state, the driving rod 5 on the driving part 1 retracts inward and pulls the connecting rod 10 through the linkage plate 9, so that the connecting rod 10 pulls the grab plate 6 to swing away from the center of the rotation shaft 7.

[0026] In actual operation, the two ends of the connecting rod 10 are rotationally connected to the grab plate 6 and the linkage plate 9, respectively. The two ends of the connecting rod 10 are rotationally connected to the grab plate 6 and the linkage plate 9 through connecting shafts, and the connecting rod 10 adjusts its own posture to offset the difference in non-synchronous movement of its two ends. Specifically, one end of the connecting rod 10 moves along a straight line with the linkage plate 9, and the other end swings around the rotation shaft 7 with the grab plate 6. The connecting rod 10 can not only transmit force between the linkage plate 9 and the grab plate 6 to match the actions of the two, but also effectively change the direction of the force to ensure that the linkage plate 9 and the grab plate 6 can move synchronously along different paths.

[0027] In actual operation, the vertical projection of the grab plate 6 is C-shaped, and the middle part of the grab plate 6 is provided with a recess. When the grabbing part 2 is switched to the clamping state, the recesses are folded together and wrap the clamping object. Specifically, the recess is fixed with a clamping block 8, one side of the clamping block 8 is fixedly connected with the groove wall, and the other side forms a clamping surface matched with the corresponding area of the clamping object. The clamping block 8 is provided with a mounting hole, and a fastener passes through the mounting hole and is screwed and locked with the grab plate 6, so that the clamping block 8 can be detachably installed in the recess. One side of the clamping block 8 is fitted with the groove wall, and the other side is matched with the outer wall profile of the bottle blank. The clamping block 8 is detachably fixed to the grab plate 6 through the fastener passing through the mounting hole, which not only ensures the relative position between the clamping block 8 and the clamping plate, but also accurately clamps the bottle blank, and also enables the replacement of the matching clamping block 8 when the bottle blank to be processed is replaced, thereby stably clamping and protecting the bottle blank. When the grabbing part 2 is switched to the clamping state, the separate clamping blocks 8 are folded together under the drive of the corresponding grab plate 6 and accurately clamp the bottle blank through the corresponding edges, ensuring that the bottle blank is accurately grabbed, conveyed and placed. The end of the connecting rod 10 is connected to the middle part of the grab plate 6 away from the recess, and the distance between the end of the connecting rod 10 and the rotation shaft 7 is increased to facilitate the control of the swing of the grab plate 6.

[0028] In actual operation, the driving part 1 is a cylinder or an oil cylinder with a driving rod 5, which not only ensures the controllable extension and retraction of the driving rod 5, but also effectively simplifies the structure and facilitates the control of the grabbing part 2.

[0029] In actual operation, the fixing plates 3 are two parallel fixing plates fixed on the top and bottom of the end edge of the driving part 1, the ends of the rotating shafts 7 are connected to the corresponding fixing plates 3, and the fixing plates 3 form a movable space for accommodating the driving rod 5 and the transmission assembly 4. One end of the fixing plate 3 is fixed on the top and bottom edges of the end edge of the driving part 1, and the other end is sleeved on the two ends of the rotating shaft 7, which ensures that the rotating shaft 7 can be positioned in a predetermined posture, and further ensures that the swing path of the grabbing plate 6 is fixed, thereby improving the grabbing precision. The linkage plate 9 and the transmission assembly 4 are located in the movable space, which prevents the rotating assembly and the driving rod 5 from being stuck due to the entry of foreign matters, and ensures the flexible control of the grabbing part 2.

[0030] In actual operation, the fixing plates 3 are T-shaped, including a horizontal part abutting the end edge of the fixed part and a vertical part vertically arranged in the center of the horizontal part, and the rotating shaft 7 is arranged at the end of the vertical part away from the horizontal part. The corresponding horizontal parts and the corresponding vertical parts of the fixing plates 3 are fixedly connected by connecting rods, so that the relative positions between the fixing plates 3 are fixed. Limiting blocks are arranged between the corresponding end edges of the horizontal parts of the fixing plates 3, which not only improve the fixing reliability between the fixing plates, but also ensure that the middle part of the horizontal part can form a space for the extension and retraction of the driving rod 5, and ensure that the driving rod 5 can freely extend and retract.

[0031] In actual operation, the mechanical gripper can be used on two-step bottle blowing machines, blow injection integrated machines and other equipment that need to clamp and transport bottle blanks, which should be regarded as specific embodiments of the present application.

Claims

1. A mechanical gripper comprising a driving part (1) and a gripping part (2), characterized in that, The driving part (1) and the grabbing part (2) are fixedly connected through the fixed plate (3), the driving part (1) is provided with the telescopic driving rod (5), the driving rod (5) drives the grabbing part (2) to open and close and switch between the opening state and the clamping state through the transmission assembly (4).

2. A mechanical gripper according to claim 1, wherein, The grabbing part (2) comprises two symmetrical grabbing plates (6), the connecting end of the grabbing plate (6) is rotatably installed on the outer end of the fixed plate (3) through the rotating shaft (7), so that the grabbing part (2) can be switched between the opening state in which the clamping ends of the grabbing plates (6) are separated from each other and the clamping state in which the clamping ends of the grabbing plates (6) are close to each other.

3. A mechanical gripper according to claim 2, wherein, The vertical projection of the grabbing plate (6) is C-shaped, the middle part of the grabbing plate (6) is provided with a groove, when the grabbing part (2) is switched to the clamping state, the grooves are close to each other and wrap the clamping object.

4. A mechanical gripper according to claim 3, wherein, The clamping block (8) is fixed at the groove, one side of the clamping block (8) is fixedly connected with the groove wall, the other side forms a clamping surface matched with the corresponding area of the clamping object, the clamping block (8) is provided with a mounting hole, the fastener passes through the mounting hole and is screwed and locked with the grabbing plate (6), so that the clamping block (8) can be detachably installed at the groove.

5. A mechanical gripper according to claim 2, wherein, When the grabbing part (2) is in the opening state, the clamping end of the grabbing plate (6) is located on the same straight line with the rotating shaft (7), so that the grabbing part (2) is opened and avoids forming a transfer channel for the clamping object to move.

6. A mechanical gripper according to any one of claims 2-5, characterized in that, The transmission assembly (4) comprises a linkage plate (9) and a connecting rod (10), the middle part of the linkage plate (9) is fixedly connected with the outer end of the driving rod (5), the two ends are rotatably connected with the middle part of the corresponding grabbing plate (6) through the connecting rod (10), so that the linkage plate (9) driven by the connecting rod (10) can swing with the driving rod (5).

7. A mechanical gripper according to claim 6, wherein, The two ends of the connecting rod (10) are rotatably connected with the grabbing plate (6) and the linkage plate (9) respectively.

8. A mechanical gripper according to any one of claims 1-5, characterized in that, The driving part (1) is a cylinder or an oil cylinder with a driving rod (5).

9. A mechanical gripper according to any one of claims 2-5, characterized in that, The fixed plate (3) is two plates and is fixedly connected with the top and bottom of the end edge of the driving part (1), the end of the rotating shaft (7) is inserted and connected with the corresponding fixed plate (3), the fixed plate (3) forms a movable space for accommodating the driving rod (5) and the transmission assembly (4) between the fixed plates (3).

10. A mechanical gripper according to claim 9, wherein, The fixed plate (3) is T-shaped, comprising a horizontal part matched with the end edge of the fixed part and a vertical part vertically arranged in the center of the horizontal part, the rotating shaft (7) is arranged at the end away from the horizontal part of the vertical part, the corresponding horizontal parts and the corresponding vertical parts of the fixed plate (3) are fixedly connected through connecting rods, so that the relative positions of the fixed plates (3) are fixed, and the horizontal parts of the fixed plate (3) are provided with limiting blocks between the corresponding end edges.

Images