Clamp clamping auxiliary mechanism

Abstract

The invention relates to the technical field of clamps, in particular to a clamp clamping auxiliary mechanism which comprises an operation table used for containing a workpiece, and an auxiliary part matched with a protruding column on the workpiece is arranged on the operation table. The auxiliary part comprises an auxiliary pressing oil cylinder located on one side of the protruding column, a fixing handle is arranged on the other side of the protruding column and hinged to a linkage handle, the linkage handle is provided with a V-shaped clamping block used for abutting against and supporting the protruding column, a push-out oil cylinder is arranged on the side, facing the protruding column, of the linkage handle, and the telescopic end of the push-out oil cylinder is connected with the linkage handle. A main pressing oil cylinder is arranged between the link handle and the auxiliary pressing oil cylinder, an oil inlet way of the push-out oil cylinder is connected into an oil return way of the main pressing oil cylinder, an oil return way of the push-out oil cylinder is connected into an oil inlet way of the main pressing oil cylinder, and an auxiliary supporting oil cylinder is arranged on the side, away from the protruding column, of the link handle. And the oil return path of the main pressing oil cylinder is utilized, so that the requirements of auxiliary supporting and holding are met, and the cost is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of clamps, and in particular to a clamp auxiliary mechanism. Background Art

[0002] For fixtures and tooling, during the fixture design stage, it is necessary to combine the structure of the actual product and add auxiliary support mechanisms at the weaker positions of the product to provide support for the workpiece during processing to prevent tool vibration, deformation or breakage.

[0003] For example, on May 28, 2021, a patent with publication number CN213289448U, entitled "A workpiece fixture for aluminum alloy accessories", was disclosed. The patent includes a workbench, a first clamping mechanism, a second clamping mechanism and an auxiliary clamping mechanism. The first clamping mechanism and the second clamping mechanism are respectively arranged on both sides of the workbench to clamp and fix the two ends of the workpiece; the auxiliary clamping mechanisms are respectively arranged in the middle of the workpiece and at the extension of one end of the workpiece; a triangular clamping point is formed for the workpiece by the first clamping mechanism and the second clamping mechanism, and positioning protrusions are arranged on the T-shaped bracket and the column to position the workpiece to ensure the stability of the workpiece clamping. The stability of workpiece clamping is further improved by adding an auxiliary clamping mechanism, and a support cylinder is used as the bottom support of the workpiece, so that the support cylinder is close to the workpiece and ensures that the workpiece will not be deformed by the support cylinder. However, the applicant found that when processing the workpiece, the first quick clamp, the second quick clamp, the third quick clamp and the support cylinder are needed, which requires the use of four oil circuits. In actual production, in order to unify the management of equipment, simplify the fixture replacement process, and avoid errors in fixture replacement, the manufacturing enterprise will make unified requirements on the hydraulic station and the number of oil circuits of the equipment. Usually, the oil circuit has three inlets and one outlet, so it is necessary to add a new oil circuit, which increases the cost. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a clamping auxiliary mechanism to solve the problem of increased cost.

[0005] Based on the above-mentioned purpose, the present invention provides a clamping auxiliary mechanism, including an operating table for placing a workpiece, the workpiece is provided with a large opening and a plurality of raised columns, the operating table is provided with a plurality of auxiliary parts that cooperate with the plurality of raised columns one by one; the auxiliary parts include an auxiliary clamping oil cylinder located on one side of the raised columns, the telescopic end of the auxiliary clamping oil cylinder is provided with an auxiliary clamping rod for clamping the raised columns, a fixed handle connected to the operating table is provided on the other side of the raised columns, the fixed handle is hinged with a linking handle through a hinge, a V-shaped block for abutting and supporting the raised columns is provided on the side of the linking handle facing the raised columns, and the linking handle faces the A pushing cylinder is provided on one side of the raised column, and the telescopic end of the pushing cylinder is connected to the linking handle, and a main clamping cylinder for pressing the raised column is provided between the linking handle and the auxiliary clamping cylinder, and the telescopic end of the main clamping cylinder is connected to a main clamping rod for pressing the raised column, and the main clamping rod is located above or on one side of the raised column, the oil inlet of the pushing cylinder is connected to the oil return of the main clamping cylinder, and the oil return of the pushing cylinder is connected to the oil inlet of the main clamping cylinder, and an auxiliary supporting cylinder is provided on the side of the linking handle away from the raised column, and the telescopic end of the auxiliary supporting cylinder is connected to an auxiliary supporting rod for contacting and tightening the linking handle.

[0006] Optionally, an elastic spring is connected to one end of the linking handle connected to the ejection cylinder, and the other end of the elastic spring is connected to the operating table through a base of the auxiliary support cylinder.

[0007] Optionally, the other end of the linking handle is slidably connected to a limit block located on the operating table, and a limit groove slidably connected to the linking handle is formed on a side of the limit block disposed toward the fixed handle.

[0008] Optionally, the length of the portion of the linking handle extending into the limiting groove is smaller than the depth of the limiting groove.

[0009] Optionally, a holding member is provided on the operating table, and the holding member is provided through the large opening of the workpiece. The holding member includes a holding motor connected to the operating table, and the output end of the holding motor is connected to a reducer, and the reducer is provided with a first speed ring and a second speed ring. The speed of the first speed ring is less than the speed of the second speed ring. A side holding plate is fixedly connected to the side wall of the first speed ring, and a driving shaft is rotatably connected to the side holding plate. The driving shaft is transmission-connected to the second speed ring, and an upper holding plate is fixedly connected to the driving shaft.

[0010] Optionally, the driving shaft and the second speed ring are connected via a transmission belt.

[0011] Optionally, a side pressure elastic pad is provided on the side of the side pressure holding plate away from the pressure holding motor, and a downward pressure elastic pad is provided below the upper pressure holding plate.

[0012] Optionally, an elastic rod is provided at one end of the upper pressing plate away from the side pressing plate, and the elastic rod and the upper pressing plate are on the same plane.

[0013] Optionally, elastic blocks are provided in both the side-pressure elastic pad and the downward-pressure elastic pad.

[0014] Beneficial effects of the present invention: The present invention provides a clamp clamping auxiliary mechanism, which utilizes the return oil circuit of the main clamping cylinder without adding additional oil circuits, solves the problem of insufficient oil circuits in the hydraulic station, achieves the requirements of auxiliary support and clamping, and thus reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0018] Figure 3 It is a schematic diagram of the structure of the cooperation between the auxiliary part and the workpiece of the present invention;

[0019] Figure 4 It is a structural schematic diagram of a workpiece of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the pressing member of the present invention;

[0021] Figure 6 It is a schematic side view of the structure of the holding member of the present invention.

[0022] In the figure: 1. operating table; 2. workpiece; 3. ejection cylinder; 4. connecting handle; 5. fixing handle; 6. hinge; 7. V-shaped block; 8. limit block; 9. limit groove; 10. elastic spring; 11. auxiliary support cylinder; 12. auxiliary clamping cylinder; 13. transmission belt; 14. holding piece; 15. holding motor; 16. reducer; 17. first speed ring; 18. second speed ring; 19. side holding plate; 20. upper holding plate; 21. driving shaft. DETAILED DESCRIPTION

[0023] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0024] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 6 As shown, a clamping auxiliary mechanism includes an operating table 1 for placing a workpiece 2, the workpiece 2 is provided with a large opening and a plurality of raised columns, the operating table 1 is provided with a plurality of auxiliary parts that cooperate with the plurality of raised columns one by one; the auxiliary parts include an auxiliary clamping cylinder 12 located on one side of the raised columns, the telescopic end of the auxiliary clamping cylinder 12 is provided with an auxiliary clamping rod for clamping the raised columns, the other side of the raised columns is provided with a fixed handle 5 connected to the operating table 1, the fixed handle 5 is hinged with a linking handle 4 through a hinge 6, the linking handle 4 is provided with a V-shaped block 7 for abutting and supporting the raised columns on one side of the raised columns, and the linking handle 4 is provided with a V-shaped block 7 for abutting and supporting the raised columns on the side of the raised columns A pushing cylinder 3 is provided on one side, and the telescopic end of the pushing cylinder 3 is connected to the linking handle 4. A main clamping cylinder for pressing the raised column is provided between the linking handle 4 and the auxiliary clamping cylinder 12. The telescopic end of the main clamping cylinder is connected to a main clamping rod for pressing the raised column. The main clamping rod is located above or on one side of the raised column. The oil inlet of the pushing cylinder 3 is connected to the oil return of the main clamping cylinder, and the oil return of the pushing cylinder 3 is connected to the oil inlet of the main clamping cylinder. An auxiliary supporting cylinder 11 is provided on the side of the linking handle 4 away from the raised column, and the telescopic end of the auxiliary supporting cylinder 11 is connected to an auxiliary supporting rod for contacting and tightening the linking handle 4.

[0026] When it is necessary to relax the workpiece 2, the auxiliary supporting cylinder 11, the auxiliary clamping cylinder 12 and the main clamping cylinder are loosened, and the hydraulic oil in the return oil circuit of the main clamping cylinder enters the pushing cylinder 3, and the telescopic end of the pushing cylinder 3 extends, pushing the connecting handle 4 and the V-shaped block 7 to move away from the raised column, so that the V-shaped block 7 does not restrict the raised column. At this time, the workpiece 2 can be taken out, and space is left for the next loading of the workpiece 2; when it is necessary to tighten the workpiece 2, the auxiliary supporting cylinder 11, the auxiliary clamping cylinder 12 and the main clamping cylinder are all started, the return oil circuit of the main clamping cylinder is depressurized, and the telescopic end of the pushing cylinder 3 is pushed out. The V-shaped clamp 7 contracts and drives the connecting handle 4 and the V-shaped clamp 7 to move toward the raised column, so that the V-shaped clamp 7 is pressed against the raised column, restricting and clamping the raised column, thereby achieving the role of auxiliary support. At the same time, it will not affect the clamping of the workpiece 2. The auxiliary support cylinder 11 controls the auxiliary support rod to extend and hold the connecting handle 4, and the auxiliary clamping cylinder 12 controls the auxiliary clamping rod to extend and hold the workpiece 2, so that the auxiliary parts hold the processing part of the workpiece 2. Without adding additional oil circuits, this mechanism utilizes the return oil circuit of the main clamping cylinder, thereby solving the problem of insufficient oil circuits in the hydraulic station, achieving the requirements of auxiliary support and clamping, and thus reducing costs.

[0027] An elastic spring 10 is connected to one end of the connecting handle 4 connected to the pushing cylinder 3, and the other end of the elastic spring 10 is connected to the operating table 1 through the base of the auxiliary supporting cylinder 11, so that when the return oil circuit of the main clamping cylinder is depressurized, the telescopic end of the pushing cylinder 3 is retracted, and the elastic spring 10 can pull the connecting handle 4 toward the workpiece 2.

[0028] In order to limit the swinging range of the linking handle 4 and facilitate supporting and clamping the workpiece 2, the other end of the linking handle 4 is slidably connected to a limit block 8 located on the operating table 1, and the limit block 8 is provided with a limit groove 9 slidably connected to the linking handle 4 on the side facing the fixed handle 5, and the length of the part of the linking handle 4 extending into the limit groove 9 is less than the depth of the limit groove 9.

[0029] The operating table 1 is provided with a holding member 14, and the holding member 14 is arranged through the large opening of the workpiece 2. The holding member 14 includes a holding motor 15 connected to the operating table 1, and the output end of the holding motor 15 is connected to a reducer 16, and the reducer 16 is provided with a first speed ring 17 and a second speed ring 18, and the speed of the first speed ring 17 is less than the speed of the second speed ring 18. A side holding plate 19 is fixedly connected to the side wall of the first speed ring 17, and a driving shaft 21 is rotatably connected to the side holding plate 19 through a bearing, and the driving shaft 21 is connected to the side wall of the first speed ring 17. The second speed ring 18 is connected through a transmission belt 13, and an upper holding plate 20 is fixedly connected to the driving shaft 21. When the workpiece 2 needs to be held, the holding motor 15 is started to drive the first speed ring 17 and the second speed ring 18 to rotate. During rotation, the speed of the first speed ring 17 is smaller than that of the second speed ring 18, and the side holding plate 19 swings to one side to clamp the side of the workpiece 2, and the upper holding plate 20 swings downward to hold the top of the workpiece 2. The swing angle of the upper holding plate 20 is greater than that of the side holding plate 19, thereby improving the holding efficiency.

[0030] In order to reduce the probability of crushing or damaging the workpiece 2 by the upper holding plate 20 and the side holding plate 19 , a side pressure elastic pad is provided on the side of the side holding plate 19 away from the holding motor 15 , and a lower pressure elastic pad is provided below the upper holding plate 20 .

[0031] An elastic rod is provided at one end of the upper pressing plate 20 away from the side pressing plate 19. The elastic rod and the upper pressing plate 20 are on the same plane. In order to facilitate the upper pressing plate 20 to press the workpiece 2 through the elastic rod, the possibility of deformation of the workpiece 2 is reduced.

[0032] In order to reduce the probability of crushing or damaging the workpiece 2 when the upper holding plate 20 and the side holding plate 19 hold the workpiece 2, elastic blocks are provided in the side pressure elastic pad and the lower pressure elastic pad. The elastic blocks may be sponge, silica gel or the like.

[0033] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. The present invention is not limited to the above-mentioned implementation modes, that is, it does not mean that the present invention must rely on the above-mentioned methods and structures to be implemented. Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0034] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture clamping auxiliary mechanism, comprising an operating table (1) for placing a workpiece (2), characterized in that: The workpiece (2) is provided with a large opening and a plurality of raised columns, and the operating table (1) is provided with a plurality of auxiliary parts that cooperate with the plurality of raised columns one by one; the auxiliary parts include an auxiliary clamping oil cylinder (12) located on one side of the raised column, and the telescopic end of the auxiliary clamping oil cylinder (12) is provided with an auxiliary clamping rod for clamping the raised column, and the other side of the raised column is provided with a fixed handle (5) connected to the operating table (1), and the fixed handle (5) is hingedly connected to a linking handle (4) through a hinge (6), and the linking handle (4) is provided with a V-shaped block (7) for abutting and supporting the raised column on the side facing the raised column, and the linking handle (4) is provided with a pushing oil cylinder (3) on the side facing the raised column. The telescopic end of the pushing cylinder (3) is connected to the linking handle (4); a main clamping cylinder for pressing the protruding column is arranged between the linking handle (4) and the auxiliary clamping cylinder (12); the telescopic end of the main clamping cylinder is connected to a main clamping rod for pressing the protruding column; the main clamping rod is located above or on one side of the protruding column; the oil inlet of the pushing cylinder (3) is connected to the oil return of the main clamping cylinder; the oil return of the pushing cylinder (3) is connected to the oil inlet of the main clamping cylinder; an auxiliary supporting cylinder (11) is arranged on the side of the linking handle (4) away from the protruding column; the telescopic end of the auxiliary supporting cylinder (11) is connected to an auxiliary supporting rod for contacting and tightening the linking handle (4).

2. A clamping auxiliary mechanism according to claim 1, characterized in that: An elastic spring (10) is connected to one end of the linking handle (4) connected to the pushing-out oil cylinder (3), and the other end of the elastic spring (10) is connected to the operating table (1) via the base of the auxiliary supporting oil cylinder (11).

3. A clamping auxiliary mechanism according to claim 1, characterized in that: The other end of the linking handle (4) is slidably connected to a limit block (8) located on the operating table (1); a limit groove (9) slidably connected to the linking handle (4) is provided on a side of the limit block (8) disposed toward the fixed handle (5).

4. A clamping auxiliary mechanism according to claim 3, characterized in that: The length of the portion of the linking handle (4) extending into the limiting groove (9) is less than the groove depth of the limiting groove (9).

5. The clamping auxiliary mechanism according to claim 1, characterized in that: The operating table (1) is provided with a holding member (14), the holding member (14) is arranged through the large opening of the workpiece (2), the holding member (14) comprises a holding motor (15) connected to the operating table (1), the output end of the holding motor (15) is connected to a reducer (16), the reducer (16) is provided with a first speed ring (17) and a second speed ring (18), the speed of the first speed ring (17) is lower than the speed of the second speed ring (18), a side holding plate (19) is fixedly connected to the side wall of the first speed ring (17), a driving shaft (21) is rotatably connected to the side holding plate (19), the driving shaft (21) is transmission-connected to the second speed ring (18), and an upper holding plate (20) is fixedly connected to the driving shaft (21).

6. A clamping auxiliary mechanism according to claim 5, characterized in that: The driving shaft (21) is connected to the second speed ring (18) via a transmission belt (13).

7. The clamping auxiliary mechanism according to claim 5, characterized in that: A side pressure elastic pad is arranged on the side of the side pressure holding plate (19) away from the pressure holding motor (15), and a downward pressure elastic pad is arranged below the upper pressure holding plate (20).

8. The clamping auxiliary mechanism according to claim 5, characterized in that: An elastic rod is arranged at one end of the upper pressing plate (20) away from the side pressing plate (19), and the elastic rod and the upper pressing plate (20) are on the same plane.

9. The clamping auxiliary mechanism according to claim 5, characterized in that: Elastic blocks are arranged inside the side-pressure elastic pad and the downward-pressure elastic pad.

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