Pneumatic tool clamp
By using multiple sets of second positioning pins and pressing jaw combinations to surround the edge of the workpiece in the pneumatic workpiece clamp, the problem of unstable workpiece fixation in the prior art is solved, and higher fixation stability and machining accuracy are achieved.
Patent Information
- Application Number
- CN202421961034.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-14
AI Technical Summary
When existing pneumatic workpieces with large fixed surface areas, they are prone to jitter and fixed angle deviation, resulting in unstable clamping and affecting the accuracy of subsequent processing.
The workpiece is securely clamped by a combination of multiple sets of second positioning pins and pressing jaws. The specific design includes providing a plurality of inward recessed holes on one side of the workpiece, inserting into the hole with a first positioning pin and a second positioning pin, and combining it with the pressing claw to form a multi-point fixation.
It effectively improves the stability of the workpiece fixation and ensures the accuracy and consistency of the workpiece during processing.
Smart Images
Figure CN222986761U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a positioning fixture, in particular to a pneumatic tooling fixture. Background Art
[0002] The description of this part only provides background information related to the disclosure of the utility model, and does not constitute prior art.
[0003] With the continuous development of the manufacturing industry, fixtures for fixing workpieces are required in all aspects of processing. The application of tooling fixtures in automated production is becoming more and more extensive. Among them, pneumatic tooling fixtures have become the first choice on many production lines due to their simple structure, convenient operation, strong adaptability and other characteristics. A pneumatic tooling fixture is a tooling fixture that uses compressed air as a power source and realizes the clamping or loosening of a workpiece through the drive of a cylinder, and has the advantages of flexible operation and stable pressing state.
[0004] However, in the existing process of fixing workpieces, especially when fixing workpieces with a large surface area, the blank surface of the workpiece is uneven, and it is very easy to have jitter during pressing and deviation in the fixing angle during the fixing process, resulting in unstable clamping of the workpiece and affecting the accuracy of subsequent processing.
[0005] At present, there is no pneumatic tooling fixture that can solve the above problems. Summary of the Utility Model
[0006] The purpose of the utility model is to provide a pneumatic tooling fixture, which can effectively improve the stability of fixing the workpiece by arranging a plurality of second positioning pins and clamping jaws in combination around the edge of the workpiece at intervals.
[0007] To achieve the above purpose, the utility model discloses a pneumatic tooling fixture, wherein, a plurality of concave holes are formed on one surface of the workpiece; the pneumatic tooling fixture includes:
[0008] A base;
[0009] A first positioning pin, the first positioning pin is arranged on the top surface of the base, the first positioning pin includes a first seat portion fixedly connected to the base and a first pin portion arranged on the first seat portion and protruding away from the base for inserting into the hole;
[0010] A second positioning pin, the second positioning pin is arranged on the top surface of the base, the second positioning pin includes a second seat portion fixedly connected to the base and a second pin portion arranged on the second seat portion and protruding away from the base for inserting into the hole;
[0011] The pressing claw, the pressing claw includes a pressing claw seat and a cantilever, the cantilever is provided with a first end rotatably connected to the pressing claw seat, and a second end for pressing the workpiece;
[0012] Wherein, the pressing claw has a relaxed state in which the cantilever is lifted, and a pressing state in which the cantilever falls; in the pressing state, the position of the second end of the cantilever corresponds to the position of the second pin part of the second positioning pin;
[0013] Each of the second positioning pins corresponds to one pressing claw, and the number of combinations of the second positioning pins and the pressing claws is not less than three groups, and the three groups of combinations of the second positioning pins and the pressing claws are arranged at intervals around the edge of the workpiece.
[0014] Further, it further includes a baffle, the baffle is arranged on the top surface of the base, and the baffle is arranged at a position between the first positioning pin and one of the second positioning pins, and / or at a position between two of the second positioning pins.
[0015] Further, the baffle is arranged as a rectangular body extending away from the base direction, and the baffle has a limiting surface for fitting with the edge of the fixed workpiece.
[0016] Further, the number of the baffles is multiple, and baffles are arranged at positions between all the first positioning pins and one of the second positioning pins, and between two of the second positioning pins.
[0017] Further, an elastic element is included between the first seat part and the first pin part of the first positioning pin, so that when the hole of the workpiece is placed on the first pin, the first pin is pressed downward toward the base.
[0018] Further, an elastic element is included between the second seat part and the second pin part of the second positioning pin, so that when the hole of the workpiece is placed on the second pin, the second pin is pressed downward toward the base.
[0019] Further, the pressing claw is arranged on the top surface of the base.
[0020] Further, it further includes a switch, the switch is arranged on the base, and the switch is signal-connected to the driving device of the cantilever of the pressing claw.
[0021] By the above technical solutions, the beneficial effects of the present utility model are as follows:
[0022] The pneumatic tooling fixture of the present utility model has multiple groups of second positioning pins and clamping jaws arranged at intervals around the edge of the workpiece, so that after the workpiece is placed on the base, each corner can be stably clamped by the second positioning pins and the clamping jaws. At the same time, the fixation in the same plane is achieved by the relatively fixed first positioning pins, effectively improving the stability of the workpiece fixation. Brief Description of the Drawings
[0023] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in this specification. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0024] Figure 1 is an isometric schematic diagram of a pneumatic tooling fixture provided by an embodiment of this specification;
[0025] Figure 2 is a schematic diagram of fixing a workpiece of a pneumatic tooling fixture provided by an embodiment of this specification;
[0026] In the figure: 100, workpiece; 1, base; 2, first positioning pin; 21, first seat part; 22, first pin part; 3, second positioning pin; 31, second seat part; 32, second pin part; 4, clamping jaw; 41, clamping jaw seat; 42, cantilever; 5, baffle; 6, switch. Detailed Embodiments
[0027] In order to enable those skilled in the art of this technology to better understand the technical solutions in this specification, the following will clearly and completely describe the technical solutions in the embodiments of this specification with reference to the drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.
[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "middle", "lower", "inner", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. The terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following will describe the implementation manners according to the overall structure of the present utility model.
[0029] Please refer to Figure 1-2 , which is a pneumatic tooling fixture for this embodiment. Among them, one surface of the workpiece 100 has a plurality of concave holes; the pneumatic tooling fixture includes:
[0030] Base 1;
[0031] The first positioning pin 2 is arranged on the top surface of the base 1. The first positioning pin 2 includes a first seat portion 21 fixedly connected to the base 1 and a first pin portion 22 arranged on the first seat portion 21, protruding away from the base 1 and used for inserting into the hole;
[0032] The second positioning pin 3 is arranged on the top surface of the base 1. The second positioning pin 3 includes a second seat portion 31 fixedly connected to the base 1 and a second pin portion 32 arranged on the second seat portion 31, protruding away from the base 1 and used for inserting into the hole;
[0033] The clamping jaw 4 includes a clamping jaw seat 41 and a cantilever 42. The cantilever 42 has a first end rotatably connected to the clamping jaw seat 41 and a second end for clamping the workpiece 100;
[0034] Among them, the clamping jaw 4 has a relaxed state in which the cantilever 42 is lifted and a clamping state in which the cantilever 42 falls; in the clamping state, the position of the second end of the cantilever 42 corresponds to the position of the second pin portion 32 of the second positioning pin 3;
[0035] Each second positioning pin 3 corresponds to a clamping jaw 4, and the number of combinations of the second positioning pin 3 and the clamping jaw 4 is not less than three groups. The three groups of combinations of the second positioning pin 3 and the clamping jaw 4 are arranged at intervals around the edge of the workpiece 100.
[0036] With the above structure, during installation, the operator only needs to prepare the base 1 with a complete horizontal plane, and install the corresponding number of first positioning pins 2 and second positioning pins 3 at the corresponding positions on the base 1 according to the corresponding dimensions of the multiple holes on the workpiece 100, so that when the workpiece 100 is placed towards the base 1, the first pin part 22 of the first positioning pin 2 can directly penetrate into the holes at the corresponding positions on the side of the workpiece 100 facing the base 1. At the same time, it also meets the requirement that when the workpiece 100 is placed towards the base 1, the second pin part 32 of the second positioning pin 3 can directly penetrate into the holes at the corresponding positions on the side of the workpiece 100 facing the base 1, and install a clamping jaw 4 matching each second positioning pin 3 for pressing the workpiece 100.
[0037] During the use of this embodiment, the operator first places the side of the workpiece 100 with concave holes facing the base 1, and respectively matches the corresponding positions of each hole with the first positioning pin 2 and the second positioning pin 3. Then, the workpiece 100 is initially placed on the base 1 towards the base 1, so that each hole in the workpiece 100 is initially sleeved on the first pin part 22 of the first positioning pin 2 and the second pin part 32 of the second positioning pin 3. Then, the operator activates the clamping jaw 4, so that the cantilever 42 of the clamping jaw 4 rotates relative to the jaw seat 41 under the action of the cylinder, causing the clamping jaw 4 to change from a relaxed state with the workpiece 100 to a tense state where it abuts against the top surface of the workpiece 100, and continuously applying force until the workpiece 100 is completely clamped tightly by all the clamping jaws 4. At this time, the fixation of the workpiece 100 in this embodiment is completed.
[0038] During the above process, since the first positioning pin 2 serves as a reference point, the workpiece 100 is first determined at least at one angle. At the same time, through at least three groups of second positioning pins 3 and clamping jaws 4, fixation is performed from no less than three angles along the outer circumference of the workpiece 100. Generally, most workpieces can meet their fixation needs from four directions, so the clamping jaws 4 can evenly clamp the workpiece 100 stably along the top surface edge of the workpiece 100.
[0039] Specifically, in this embodiment, the number of the second positioning pins 3 and the clamping jaws 4 is three groups. The three groups of second positioning pins 3 and clamping jaws 4 can form the same stable plane, ensuring the basic fixation effect on the basis of controlling costs. The first end of the cantilever 42 and the cylinder that can be lifted or lowered on the jaw seat 41 are connected through a rotary shaft sleeve assembly. The middle position of the cantilever 42 is also connected to the jaw seat 41 through a rotary shaft sleeve assembly. After the cylinder rises, the middle height of the cantilever 42 remains unchanged, the first end of the cantilever 42 rises, and the second end of the cantilever 42 facing the workpiece 100 drops, so that the workpiece 100 is pressed tightly by the second end of the cantilever 42. For specific changes, please refer to Figures 1 to 2 。
[0040] Further, it further includes a baffle 5, the baffle 5 is arranged on the top surface of the base 1, and the baffle 5 is arranged at a position between the first positioning pin 2 and one of the second positioning pins 3, and / or at a position between the two second positioning pins 3. The baffle 5 is arranged as a rectangular body extending in a direction away from the base 1, and the baffle 5 has a limiting surface for fitting with the edge of the fixed workpiece 100. Specifically, please refer to Figure 2 , the baffle is arranged to be fixed on the base 1 and is a regular geometric rectangular column protruding away from the base 1. During the process of completely placing or fixing the workpiece 100, the baffle 5 can play an auxiliary and guiding role in the slight movement of the workpiece 100. After the workpiece 100 is completely fixed, one side of the rectangular column facing the workpiece 100 closely fits with one side of the workpiece 100, so that the workpiece 100 is clamped and fixed more stably, avoiding the detachment of the workpiece 100.
[0041] Further, in this embodiment, the number of the baffles 5 is multiple, and baffles 5 are arranged at all positions between the first positioning pin 2 and one of the second positioning pins 3 and between the two second positioning pins 3. Specifically, in this embodiment, there are three second positioning pins 3 and one first positioning pin 2. That is to say, a total of four baffles 5 are arranged between multiple first positioning pins 2 and / or second positioning pins 3, and the baffles 5 are arranged at relatively central positions between the two positioning pins, so that each side of the workpiece 100 can be effectively supported.
[0042] Further, an elastic element is included between the first base portion 21 and the first pin portion 22 of the first positioning pin 2, so that when the hole of the workpiece 100 is placed on the first pin 22, the first pin 22 is pressed downward toward the base 1. Since the plane tolerance of the workpiece 100 is relatively large in some cases, through the setting of the floating first pin portion 22, the situation of unstable fixing caused by the tolerance of the workpiece 100 itself can be effectively avoided.
[0043] Meanwhile, in another embodiment, an elastic element is included between the second base portion 31 and the second pin portion 32 of the second positioning pin 3, so that when the hole of the workpiece 100 is placed on the second pin 32, the second pin 32 is pressed downward toward the base 1. Away from the elastic element arranged between the first base portion 21 and the first pin portion 22, the purpose is also to make the setting of the floating second pin portion 32 avoid the situation of unstable fixing caused by the tolerance of the workpiece 100 itself. At the same time, when the cantilever 42 of the clamping jaw 4 clamps the workpiece 100, it can avoid the damage of the workpiece 100 caused by excessive pressure of the clamping jaw 4, so that the force of part of the clamping jaw 4 is offset by the spring.
[0044] Furthermore, in this embodiment, the clamping jaw 4 is arranged on the top surface of the base 1. Compared with the case where the clamping jaw 4 is arranged in the area outside the base 1, this embodiment can effectively keep the first positioning pin 2, the second positioning pin 3 and the clamping jaw 4 in the same plane, which is more conducive to the stability calibration of the fixation of the workpiece 100.
[0045] Furthermore, a switch 6 is further included. The switch 6 is arranged on the base 1 and is signal-connected to the driving device of the cantilever 42 of the clamping jaw 4. Specifically, in this embodiment, there are three groups of clamping jaws 4 in total, that is, there are three cylinders as driving devices that can be controlled by the switch 6. Therefore, the switch 6 in this embodiment is composed of three separate sub-switches, so as to facilitate the custom adjustment of the clamping force of the clamping jaws 4 in different areas of the workpiece 100.
[0046] Although different specific embodiments are mentioned in the content of this application, this application is not limited to the situations described by industry standards or embodiments. Some industry standards or implementation schemes slightly modified on the basis of the implementation described by the custom method or embodiment can also achieve the same, equivalent or similar, or predictable implementation effects after deformation as the above embodiments. The embodiments using these modified or deformed data acquisition, processing, output, judgment methods, etc. still fall within the scope of the optional implementation schemes of this application.
[0047] Although this application is depicted through embodiments, those of ordinary skill in the art know that this application has many deformations and changes without departing from the spirit of this application. It is hoped that the appended embodiments include these deformations and changes without departing from this application.
Claims
1. A pneumatic fixture for fixing a workpiece, wherein: One side of the workpiece has a plurality of concave holes; characterized in that the pneumatic fixture comprises: Base; A first positioning pin, the first positioning pin is arranged on the top surface of the base, the first positioning pin comprises a first seat portion fixedly connected to the base and a first pin portion arranged on the first seat portion and protruding away from the base and used to be inserted into the hole; A second positioning pin, the second positioning pin is arranged on the top surface of the base, the second positioning pin comprises a second seat portion fixedly connected to the base and a second pin portion arranged on the second seat portion, protruding away from the base and used to be inserted into the hole; A pressure claw, the pressure claw comprising a pressure claw seat and a cantilever, the cantilever is provided with a first end rotatably connected to the pressure claw seat, and a second end for pressing the workpiece; The pressing claw has a relaxed state in which the cantilever is lifted, and a pressed state in which the cantilever is dropped; in the pressed state, the position of the second end of the cantilever corresponds to the position of the second pin portion of the second positioning pin; Each of the second positioning pins corresponds to one of the pressure claws, the number of the second positioning pin and the pressure claw combination is not less than three groups, and the three groups of the second positioning pin and the pressure claw combination are arranged at intervals around the edge of the workpiece.
2. The pneumatic fixture according to claim 1, characterized in that: It also includes a baffle, which is arranged on the top surface of the base, and the baffle is arranged at a position between the first positioning pin and one of the second positioning pins, and / or between two of the second positioning pins.
3. The pneumatic fixture according to claim 2, characterized in that: The baffle is configured as a rectangular body extending away from the base, and the baffle has a limiting surface for fitting with the edge of the fixed workpiece.
4. The pneumatic fixture according to claim 2, characterized in that: There are multiple baffles, and baffles are provided at positions between all the first positioning pins and one of the second positioning pins, and at positions between two of the second positioning pins.
5. The pneumatic fixture according to claim 1, characterized in that: An elastic element is included between the first seat portion and the first pin portion of the first positioning pin, so that when the hole of the workpiece is placed on the first pin, the first pin is pressed down toward the base.
6. The pneumatic fixture according to claim 1, characterized in that: An elastic element is included between the second seat portion and the second pin portion of the second positioning pin, so that when the hole of the workpiece is placed on the second pin, the second pin is pressed down toward the base.
7. The pneumatic fixture according to claim 1, characterized in that: The pressing claw is arranged on the top surface of the base.
8. The pneumatic fixture according to claim 1, characterized in that: It also includes a switch, which is arranged on the base and has a signal connection with a driving device of the cantilever of the pressing claw.