Workpiece clamping and holding device

Abstract

The utility model provides a workpiece clamping and holding device which comprises a driving piece driven by a movable driving device to lift up and down and move transversely. The clamping pieces are correspondingly connected with the two sides of the driving piece respectively, and the clamping pieces on the two sides are driven by a clamping driving device to clamp oppositely or open oppositely; the air bag is located between the clamping pieces on the two sides and connected with the driving piece, the air bag vertically extends, and the outer diameter of the air bag is smaller than the inner diameter of the through hole; and the extrusion pieces are arranged on the opposite sides of the clamping pieces on the two sides and correspond to the upper portions of the air bags. Through the additional arrangement of the air bag and the extrusion part, the clamping device not only clamps the outer wall of the workpiece through the clamping part, but also clings to the inner wall of the through hole through the lower part of the air bag extruded and bulged by the extrusion part, so that the contact area between the clamping device and the inner wall and the outer wall of the workpiece when the clamping device clamps the workpiece is greatly increased; and when the workpiece is heavy or needs to be transferred for a long distance, high-stability clamping and carrying of the workpiece can be achieved.

Description

A workpiece clamping device Technical Field

[0001] This utility model relates to the field of handling mechanisms, specifically a workpiece clamping device. Background Technology

[0002] Currently, in the production process of pulley workpieces, it is common to use a robotic arm to grip the workpiece and then move it to the next processing station. This type of automated device uses a clamping action to grip the blanks conveyed by the feeding conveyor line to the next processing station. After processing is completed, the finished parts are then gripped to the discharge conveyor line to complete the production cycle.

[0003] However, the overall cost of robotic arms is high, and during the workpiece transfer process, the robotic arm only holds the workpiece with grippers. This results in a small contact area between the grippers and the outer wall of the workpiece, and the resulting frictional resistance is insufficient to maintain gripping stability. When encountering large workpieces or when long-distance transfer is required, there is a risk that the workpiece may fall and be damaged due to insufficient frictional resistance, or that excessive gripping force may be used to improve gripping stability, causing damage to the surface of the workpiece. This is especially true for finished parts that have already been processed, as they are very likely to be damaged on their outer wall and scrapped, affecting the yield rate of the workpiece.

[0004] The research objective of this utility model is to design a workpiece clamping device to address the problems existing in the prior art. Summary of the Invention

[0005] This invention provides a workpiece clamping device that can effectively solve the above-mentioned problems.

[0006] This utility model is implemented as follows:

[0007] A workpiece clamping device for clamping a corresponding workpiece, wherein the workpiece has a through hole extending vertically through its middle section, and the clamping device comprises:

[0008] The driving component is driven by a movable driving device to move up and down and laterally.

[0009] Several clamping members are respectively connected to both sides of the driving member. The clamping members on both sides are driven by the clamping driving device to clamp towards each other or open in opposite directions.

[0010] An airbag is located between the clamping members on both sides and connected to the driving member. The airbag extends vertically and its outer diameter is smaller than the inner diameter of the perforation.

[0011] Several extrusion members are respectively disposed on the opposing sides of the clamping members on both sides and corresponding to the upper part of the airbag; when the extrusion members on both sides correspond to the outer wall of the workpiece and the airbag extends into the perforation, after the clamping members on both sides clamp each other, the extrusion members on both sides squeeze the upper part of the airbag in opposite directions, so that the lower part of the airbag bulges up and sticks tightly to the inner wall of the perforation.

[0012] Furthermore, a drive seat is provided at the bottom of one end of the drive member, the airbag is fixed in the middle of the bottom of the drive seat, there are two clamping members and they are symmetrically located on both sides of the drive seat, the clamping drive device is provided in the drive seat and the two drive ends are respectively connected to the upper ends of the two clamping members after sliding through the drive seat via several sliding rods, and a buffer spring is sleeved on the sliding rod and placed between the drive seat and the clamping member.

[0013] Furthermore, the two clamping members are designed as vertical plates and each of their opposing sides is provided with an anti-slip layer that matches the curvature of the outer wall of the workpiece.

[0014] Furthermore, the extrusion member is configured as a laterally extending plate, and the opposing sides of the two extrusion members are recessed to form extrusion portions that are adapted to the upper outer wall of the airbag, and both extrusion portions are provided with flexible layers.

[0015] Furthermore, the lower part of the airbag contracts to form an expansion portion for extending into the perforation, and the upper part expands outward to form a pressure portion with an outer diameter larger than the expansion portion for compression.

[0016] Furthermore, the active drive device includes a lifting seat that is driven to move up and down by a lifting drive device. One end of the lifting seat extends laterally to form a sliding sleeve for laterally slidingly inserting the drive member, and the other end is folded down and slidably fitted onto the drive end of the lifting drive device. The sliding sleeve contains a telescopic drive device for driving the drive member to move laterally.

[0017] The beneficial effects of this utility model are:

[0018] 1. During the clamping and transporting of the workpiece by the clamping device, when the pressing members on both sides correspond to the outer wall of the workpiece and the airbag extends into the perforation, after the clamping members on both sides clamp towards each other, the pressing members on both sides press against the upper part of the airbag, causing the lower part of the airbag to bulge and adhere tightly to the inner wall of the perforation. Thus, by adding the airbag and pressing members, the clamping device not only clamps the workpiece to the outer wall of the workpiece through the clamping members, but also presses the lower part of the airbag, which is bulging under the pressure of the pressing members, against the inner wall of the perforation. This greatly increases the contact area between the clamping device and the inner and outer walls of the workpiece when clamping it. This allows for highly stable clamping and transport of workpieces with large weights or requiring long-distance transport. Furthermore, due to the auxiliary clamping effect of the airbag, the clamping force of the clamping members can be appropriately reduced, thus eliminating the risk of excessive compression causing damage to the workpiece.

[0019] 2. The anti-slip layer increases the contact area and friction between the clamping component and the outer wall of the workpiece, greatly improving the stability of the clamping component and reducing the risk of the workpiece slipping and falling when it is suspended in the air. Furthermore, the flexible and high-friction airbag and the anti-slip layer contact the inner and outer walls of the workpiece respectively, preventing wear on the inner and outer walls.

[0020] 3. The flexible layer prevents the airbag from being damaged when the extruder squeezes the airbag through the extrusion section, thus reducing the life of the airbag and improving the stability of the extruder squeezing the airbag.

[0021] 4. By adding a shrinking expansion section, the lower part of the airbag can be more easily inserted into the perforation, reducing the probability of the airbag bending due to contact with the workpiece during insertion, thus ensuring the stability of the airbag when inserted into the perforation. At the same time, by adding an outwardly expanding pressure section, the volume of gas moving to the expansion section after being squeezed can be increased, thereby ensuring that even when the expansion section is shrinking, its outer wall can still be evenly and tightly attached to the inner wall of the perforation after bulging, improving the stability of the expansion section's function. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the structure when clamping the workpiece in Embodiment 1.

[0023] Figure 2 is a schematic diagram of the structure of Example 1 when the workpiece is not clamped.

[0024] Figure 3 is a cross-sectional view of the structure of Example 1 when the workpiece is not clamped.

[0025] Figure 4 is a cross-sectional view of the workpiece clamping in Embodiment 1.

[0026] Figure 5 is a cross-sectional view of the structure of Example 2 when the workpiece is not clamped. Detailed Implementation

[0027] Example 1

[0028] Referring to Figures 1-4, a workpiece clamping device is provided for clamping a corresponding workpiece 7. The workpiece 7 has a through hole 71 extending vertically through its center. Specifically, in this embodiment, the workpiece 7 is a pulley. The clamping device includes:

[0029] Drive component 1 is driven by movable drive device 6 to move up and down and laterally;

[0030] Several clamping members 2 are respectively connected to both sides of the driving member 1. The clamping members 2 on both sides are driven by the clamping driving device 3 to clamp towards each other or open in opposite directions. Specifically, the clamping driving device 3 can be a telescopic driving device such as an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder.

[0031] Airbag 4 is located between the clamping members 2 on both sides and connected to the driving member 1. The airbag 4 extends vertically and its outer diameter is smaller than the inner diameter of the perforation 71. Specifically, the airbag 4 can be a flexible rubber airbag with high friction. An inflation port for inflation can be provided on one side of the upper end of the airbag 4 so as to replenish the air when the internal gas is insufficient after long-term use.

[0032] Several extrusion members 5 are respectively disposed on the opposing sides of the clamping members 2 on both sides and corresponding to the upper part of the airbag 4;

[0033] The above-described structure allows the clamping device to clamp and transport the workpiece 7. When the pressing members 5 on both sides correspond to the outer wall of the workpiece 7 and the airbag 4 extends into the perforation 71, the clamping members 2 on both sides clamp towards each other, and the pressing members 5 on both sides press against the upper part of the airbag 4, causing the lower part of the airbag 4 to bulge and adhere tightly to the inner wall of the perforation 71. Thus, by adding the airbag 4 and the pressing members 5, the clamping device not only clamps the workpiece 7 to the outer wall of the workpiece 7 through the clamping members 2, but also allows the lower part of the airbag 4, which is bulging under the pressure of the pressing members 5, to adhere tightly to the inner wall of the perforation 71. This greatly increases the contact area between the clamping device and the inner and outer walls of the workpiece 7 when clamping it. This enables highly stable clamping and transport of the workpiece 7 when it is heavy or requires long-distance transport. Furthermore, due to the auxiliary clamping effect of the airbag 4, the clamping force of the clamping members 2 can be appropriately reduced, thus eliminating the risk of damage to the workpiece 7 due to excessive compression.

[0034] To improve the driving stability of the clamping drive device 3, a drive seat 11 is provided at the bottom of one end of the drive member 1. The airbag 4 is fixed in the middle of the bottom of the drive seat 11. There are two clamping members 2, which are symmetrically located on both sides of the drive seat 11. The clamping drive device 3 is located inside the drive seat 11, and the two drive ends are connected to the upper ends of the two clamping members 2 by sliding through the drive seat 11 via several sliding rods 31. A buffer spring 32 is sleeved on the sliding rod 31 and is positioned between the drive seat 11 and the clamping members 2. Thus, the buffer spring 32 can prevent the workpiece 7 from being damaged by excessive speed and force when the two clamping members 2 clamp each other. The lateral sliding of the several sliding rods 31 can limit the driving direction of the clamping drive device 3, thereby improving the driving stability of the clamping drive device 3.

[0035] To improve the stability of the clamping components 2, both clamping components 2 are designed as vertical plates, and each has an anti-slip layer 21 on its facing sides that adapts to the curvature of the outer wall of the workpiece 7. Specifically, the anti-slip layer 21 can be made of flexible and high-friction rubber or other materials. The anti-slip layer 21 increases the contact area and friction between the clamping component 2 and the outer wall of the workpiece 7 when clamping it, which greatly improves the stability of the clamping component 2 in clamping the workpiece 7, reduces the risk of the workpiece 7 slipping and falling when it is suspended in the air, and the flexible and high-friction airbag 4 and the anti-slip layer 21 respectively contact the inner and outer walls of the workpiece 7 without causing wear to the inner and outer walls of the workpiece 7.

[0036] To achieve flexible contact between the extrusion member 5 and the airbag 4, the extrusion member 5 is designed as a laterally extending plate. The opposing sides of the two extrusion members 5 are recessed to form extrusion portions 51 that correspond to and adapt to the upper outer wall of the airbag 4. Both extrusion portions 51 are provided with flexible layers. This flexible layer design prevents damage to the airbag 4 when the extrusion member 5 compresses the airbag 4 through the extrusion portions 51, thus avoiding a decrease in the airbag 4's lifespan, and simultaneously improves the stability of the extrusion member 5 compressing the airbag 4.

[0037] Specifically, the movable drive device 6 includes a lifting seat 61 that is driven to move up and down by the lifting drive device 62. One end of the lifting seat 61 extends laterally to form a sliding sleeve 611 for laterally sliding insertion of the drive member 1, and the other end is folded down and the sliding sleeve 611 is provided at the drive end of the lifting drive device 62. The sliding sleeve 611 is provided with a telescopic drive device for driving the drive member 1 to move laterally. Specifically, the lifting drive device 62 and the telescopic drive device can be telescopic drive devices such as electric cylinders, pneumatic cylinders, and hydraulic cylinders.

[0038] Example 2

[0039] Referring to Figure 5, the difference between this embodiment and Embodiment 1 is as follows:

[0040] To improve the stability of the airbag 4 extending into the perforation 71, the lower part of the airbag 4 contracts to form an expansion portion 41 for extending into the perforation 71, and the upper part expands outward to form a pressure-receiving portion 42 with an outer diameter larger than the expansion portion 41 for compression. Thus, the addition of the contractile expansion portion 41 makes it easier for the lower part of the airbag 4 to extend into the perforation 71, reducing the probability of the airbag 4 bending due to contact with the workpiece 7 during insertion, thereby ensuring the stability of the airbag 4 extending into the perforation 71. Simultaneously, the addition of the outwardly expanding pressure-receiving portion 42 increases the volume of gas moving to the expansion portion 41 after compression, ensuring that even when the expansion portion 41 is contracted, its outer wall remains evenly and tightly attached to the inner wall of the perforation 71 after bulging, improving the stability of the expansion portion 41's function.

[0041] It should be noted that this embodiment is implemented in the same way as the first embodiment in terms of principle and technical effect. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in the first embodiment.

[0042] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A workpiece clamping device for clamping a corresponding workpiece (7), wherein the workpiece (7) has a through hole (71) extending vertically through its middle portion, characterized in that, The clamping device includes: a driving member (1), driven by a movable driving device (6) to move up and down and laterally; a plurality of clamping members (2), respectively connected to both sides of the driving member (1), the clamping members (2) on both sides being driven by the clamping driving device (3) to clamp towards each other or open in opposite directions; an airbag (4), located between the clamping members (2) on both sides and connected to the driving member (1), the airbag (4) extending vertically and having an outer diameter smaller than the inner diameter of the perforation (71). Diameter; several extrusion members (5) are respectively disposed on the opposing sides of the clamping members (2) on both sides and corresponding to the upper part of the airbag (4); when the extrusion members (5) on both sides correspond to the outer wall of the workpiece (7) and the airbag (4) extends into the perforation (71), after the clamping members (2) on both sides clamp each other, the extrusion members (5) on both sides squeeze the upper part of the airbag (4) so ​​that the lower part of the airbag (4) bulges up and sticks tightly to the inner wall of the perforation (71).

2. The workpiece clamping device as described in claim 1, characterized in that, The driving component (1) has a driving seat (11) at one end of its bottom. The airbag (4) is fixed in the middle of the bottom of the driving seat (11). There are two clamping components (2) and they are symmetrically located on both sides of the driving seat (11). The clamping driving device (3) is located inside the driving seat (11) and its two driving ends are connected to the upper ends of the two clamping components (2) after sliding through the driving seat (11) via several sliding rods (31). A buffer spring (32) is sleeved on the sliding rod (31) and is placed between the driving seat (11) and the clamping component (2).

3. The workpiece clamping device as described in claim 2, characterized in that, The two clamping members (2) are designed as vertical plates and have anti-slip layers (21) on their opposing sides that are adapted to the curvature of the outer wall of the workpiece (7).

4. The workpiece clamping device as described in claim 1, characterized in that, The extrusion member (5) is configured as a plate extending laterally, and the opposing sides of the two extrusion members (5) are recessed to form extrusion portions (51) that are adapted to the upper outer wall of the airbag (4), and both extrusion portions (51) are provided with flexible layers.

5. The workpiece clamping device as described in claim 1, characterized in that, The lower part of the airbag (4) contracts to form an expansion portion (41) for extending into the perforation (71), and the upper part expands outward to form a pressure portion (42) with an outer diameter larger than the expansion portion (41) for compression.

6. The workpiece clamping device as described in claim 1, characterized in that, The active drive device (6) includes a lifting seat (61) that is driven to move up and down by a lifting drive device (62). One end of the lifting seat (61) extends laterally to form a sliding sleeve (611) for laterally sliding insertion of the drive member (1), and the other end is folded down and the sliding sleeve (611) is provided at the drive end of the lifting drive device (62). The sliding sleeve (611) is provided with a telescopic drive device for driving the drive member (1) to move laterally.

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