Symmetrical pneumatic clamp

Abstract

The utility model discloses a symmetrical pneumatic clamp which comprises a fixed seat, a vertical plate, a symmetrical clamping air cylinder, a gear assembly and a guide assembly. The fixing base is of a strip plate structure, a vertical plate of a plate-shaped structure is fixed to the side face of the fixing base, a symmetrical clamping air cylinder is fixed to the vertical plate through an air cylinder support, a rack is fixed to the telescopic end of the symmetrical clamping air cylinder, a gear is rotationally matched with the vertical plate through a gear shaft, and the rack and the gear are meshed with each other. Symmetrical movement assemblies are fixed to the other end of the gear shaft, a rotating wheel is concentrically fixed to the gear shaft, the two sides of the rotating wheel are each rotationally matched with a connecting rod, and the other ends of the two sets of connecting rods are each rotationally matched with a sliding block. The sliding block is in sliding fit with a guide rail in the guide assembly. Clamping teeth are fixed on each group of sliding blocks; the device has the beneficial effects that the clamping height can be adaptively adjusted; and a tubular workpiece can be clamped, and the production cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining fixtures, and particularly relates to a symmetrical pneumatic fixture. Background Art

[0002] Many existing workpiece processing equipment usually need to keep the workpiece in a mid-position during processing due to their fixed processing position. The existing equipment is provided with a driving fixture that can keep the workpiece in the mid-position processing position, such as CN104191287A. If this technology is to achieve mid-position clamping of the workpiece, two cylinders are required to drive the two clamps to achieve clamping action from two directions on this degree of freedom, thereby reducing the clamping efficiency and increasing the production cost of the clamping device. In addition, the telescopic accuracy of the two cylinders is required to be high, so two sets of high-precision cylinders need to be purchased at the same time, further increasing the equipment cost, and it cannot adaptively adjust the clamping height according to different workpieces. Utility Model Content

[0003] The purpose of the utility model is to provide a symmetrical pneumatic clamp to solve the technical problems mentioned in the above background technology.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A symmetrical pneumatic clamp comprises: a fixed seat, a vertical plate, a symmetrical clamping cylinder, a gear assembly, and a guide assembly; the fixed seat is a strip plate structure, a vertical plate with a plate-like structure is fixed on the side of the fixed seat, a symmetrical clamping cylinder is fixed on the vertical plate by a cylinder bracket, a rack is fixed on the telescopic end of the symmetrical clamping cylinder, a gear is rotatably matched with the vertical plate through the gear shaft, and the rack and the gear are meshed with each other; a symmetrical motion assembly is fixed to the other end of the gear shaft, and the symmetrical motion assembly comprises: a rotating wheel, a connecting rod, and a slider; the rotating wheel is concentrically fixed to the gear shaft, and the two sides of the rotating wheel are respectively rotatably matched with a connecting rod, and the other ends of the two groups of connecting rods are respectively rotatably matched with a slider; the slider is slidably matched on the guide rail in the guide assembly, and the guide assembly also comprises a connecting column and a guide rail platform, wherein the guide rail platform is fixed on the vertical plate, and the two ends of the guide rail are fixed on the guide rail platform by connecting columns; clamping teeth are fixed on each group of sliders.

[0006] Further: In order to prevent the rack from falling and affecting the meshing of the rack and the gear: the gear assembly includes: a gear shaft, a gear, a top shaft, and a top piece bearing; a top shaft with a horizontal shaft structure is fixed under the rack, and a top piece bearing is rotatably fitted on the top shaft, and the bearing surface of the top piece bearing is tangent to the lower plane of the rack.

[0007] Further: in order to facilitate the adjustment of the height of symmetrical clamping, a lifting platform is provided on the fixed seat, and the lifting platform includes: a table plate, a connecting frame, a sliding seat, a sliding column, and a lifting cylinder; at least two groups of sliding seats are fixed on the fixed seat, and each group of sliding seats is slidably matched with a sliding column of a columnar structure, and the top of the sliding column penetrates the fixed seat and is connected to a connecting frame with a plate structure, and a lifting cylinder is fixed under the fixed seat, and the telescopic end of the lifting cylinder penetrates the fixed seat and is connected to the middle part of the connecting frame, and a table plate with a flat plate structure is connected to the connecting frame.

[0008] Furthermore: in order to increase the lateral pressure-bearing strength of the lifting platform, the platform is connected to a reinforcing seat and a connecting frame through a rectangular parallelepiped structure, and both sides of the reinforcing seat are connected to the platform with reinforcing ribs distributed in an array.

[0009] Further: the clamping surface of the clamping tooth is conveniently replaced, and the clamping tooth includes: a clamping frame, a groove, a boss, and a clamping block; the clamping frame is a bracket structure, and at least two groups of horizontal grooves are provided on the clamping frame, and the width of the groove close to the side of the holder is greater than the width of the groove away from the side of the clamping frame; each group of grooves is slidably embedded with a boss that fits the outer contour of the groove, and all the bosses are fixed on a clamping block of a block-shaped structure, and the clamping block is used to clamp the workpiece.

[0010] Furthermore: in order to facilitate clamping of conventional workpieces, a side of the clamping block away from the clamping frame is provided as a fitting surface that fits the contour of the clamped conventional workpiece.

[0011] Furthermore: in order to clamp the tubular workpiece so that the center of the tubular workpiece is always located on the central axis plane, a V-shaped cutting structure is provided on the side of the holding block away from the clamping frame to form a V-groove.

[0012] Furthermore: in order to increase the rotation range of the rotating wheel, the connecting rod connected to the rotating wheel is an arc-shaped rod-shaped structure, and the arc-shaped openings of the two groups of connecting rods are arranged opposite to each other.

[0013] In summary, the utility model has the following beneficial effects:

[0014] ① Only one set of cylinders is required to realize clamping operations in two directions, and the precision requirements of the cylinders are small, and the equipment cost is low: through the establishment of gear components and symmetrical motion components, the symmetrical clamping cylinder is started to extend and retract, and the symmetrical clamping cylinder drives the connected rack to move horizontally, and the rack drives the meshing gear to rotate, and the gear drives the rotating wheel to rotate through the gear shaft, and the rotating wheel drives the slider to move through two sets of connecting rods. Because the two sets of sliders are slidably fitted on the guide rails, the sliders driven by the connecting rods will approach or move away from each other at the same time along the guide rails, thereby driving the clamping teeth connected to the sliders to approach or move away from each other at the same time, and then the extension or shortening of the symmetrical clamping cylinder can be controlled to enable the clamping teeth to complete the symmetrical clamping or symmetrical opening operation of conventional workpieces or tubular workpieces.

[0015] ② The height of the clamping can be adaptively adjusted according to the different workpieces: through the establishment of a lifting platform, the telescopic lifting cylinder can be used to drive the table plate, reinforcement seat, connecting frame, and sliding column to slide up and down along the sliding seat as a whole, thereby adjusting the height of the table plate.

[0016] ③ It can clamp tubular workpieces and keep the axis of the tubular workpiece always on the central axis plane: through the establishment of replaceable clamping blocks, V-grooves and lifting platforms, when using clamping blocks with V-grooves to symmetrically clamp tubular workpieces, it is necessary to use a telescopic lifting cylinder, as shown in the figure, to lift the tubular workpiece to a height where its central axis is flush with the bottom of the V-groove. In this way, when the same batch of tubular workpieces are clamped symmetrically by the clamping teeth, the V-groove can fit and clamp the tubular workpiece, which can ensure that the axis of the tubular workpiece is always on the central axis plane and in the same position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the back structure of the utility model;

[0019] Figure 3 yes Figure 2 A magnified view of the structure in the middle;

[0020] Figure 4 It is a structural schematic diagram of the lifting platform in the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the mating surface in the clamping tooth assembly;

[0022] Figure 6 It is a schematic diagram of the structure of the V-groove in the clamping tooth assembly;

[0023] Figure 7 It is a schematic diagram of the principle of the clamping tooth assembly clamping a conventional workpiece;

[0024] Figure 8 It is a schematic diagram of the principle of the clamping tooth assembly clamping a tubular workpiece;

[0025] Fig. 9 It is a schematic diagram of the structure of the V-groove in the clamping tooth assembly;

[0026] In the figure, 1, fixed seat; 2, vertical plate; 3, symmetrical clamping cylinder; 4, rack; 5, gear assembly; 6, symmetrical motion assembly; 7, lifting platform; 8, guide assembly; 9, clamping teeth; 31, cylinder bracket; 51, gear shaft; 52, gear; 53, top shaft; 54, top piece bearing; 61, rotating wheel; 62, connecting rod; 63, slider; 71, table; 72, connecting frame; 73, slide seat; 74, slide column; 75, lifting cylinder; 76, reinforcement seat; 75, reinforcement rib; 81, guide rail; 82, connecting column; 83, guide rail platform; 91, clamping frame; 92, groove; 93, boss; 94, clamping block; 95, fitting surface; 96, V-groove; 10, conventional workpiece; 11, tubular workpiece. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings. Example

[0028] See also Figure 1-Figure 9 , the utility model provides a technical solution:

[0029] A symmetrical pneumatic clamp comprises: a fixed seat 1, a vertical plate 2, a symmetrical clamping cylinder 3, a gear assembly 5, and a guide assembly 8; the fixed seat 1 is a strip plate structure, a vertical plate 2 with a plate-like structure is fixed to the side of the fixed seat 1, a symmetrical clamping cylinder 3 is fixed to the vertical plate 2 by a cylinder bracket 31, a rack 4 is fixed to the telescopic end of the symmetrical clamping cylinder 3, a gear 52 is rotatably matched with the vertical plate 2 through a gear shaft 51, and the rack 4 and the gear 52 are meshed with each other; a symmetrical motion assembly 6 is fixed to the other end of the gear shaft 51, and the symmetrical The motion component 6 includes: a rotating wheel 61, a connecting rod 62, and a slider 63; the rotating wheel 61 is concentrically fixed on the gear shaft 51, and each of the two sides of the rotating wheel 61 is rotatably matched with a connecting rod 62, and the other end of the two groups of connecting rods 62 is rotatably matched with a slider 63; the slider 63 is slidably matched on the guide rail 81 in the guide component 8, and the guide component 8 also includes a connecting column 82 and a guide rail platform 83, wherein the guide rail platform 83 is fixed on the vertical plate 2, and the connecting column 82 is used on the guide rail platform 83 to fix the two ends of the guide rail 81; each group of sliders 63 is fixed with clamping teeth 9.

[0030] In order to prevent the rack from falling and affecting the meshing of the rack 4 and the gear 52: the gear assembly 5 includes: a gear shaft 51, a gear 52, a top shaft 53, and a top piece bearing 54; a top shaft 53 with a horizontal shaft structure is fixed below the rack 4, and a top piece bearing 54 is rotatably fitted on the top shaft 53, and the bearing surface of the top piece bearing 54 is tangent to the lower plane of the rack 4.

[0031] In order to facilitate the adjustment of the symmetrical clamping height, a lifting platform 7 is provided on the fixed seat 1, and the lifting platform 7 includes: a table plate 71, a connecting frame 72, a slide seat 73, a slide column 74, and a lifting cylinder 75; at least two groups of slide seats 73 are fixed on the fixed seat 1, and each group of slide seats 73 is slidably matched with a slide column 74 with a columnar structure, and the top of the slide column 74 penetrates the fixed seat 1 and is connected to the connecting frame 72 with a plate structure, and a lifting cylinder 75 is fixed under the fixed seat 1, and the telescopic end of the lifting cylinder 75 penetrates the fixed seat 1 and is connected to the middle part of the connecting frame 72, and the connecting frame 72 is connected to a table plate 71 with a flat plate structure.

[0032] In order to increase the lateral pressure-bearing strength of the lifting platform 7 , the platform 71 is connected to the connecting frame 72 via a reinforcing seat 76 of a rectangular parallelepiped structure, and both sides of the reinforcing seat 76 are connected to the platform 71 using reinforcing ribs 77 distributed in an array.

[0033] The clamping surface of the clamping tooth 9 is conveniently replaced. The clamping tooth 9 includes: a clamping frame 91, a groove 92, a boss 93, and a clamping block 94; the clamping frame 91 is a bracket structure, and at least two groups of horizontal grooves 92 are provided on the clamping frame 91, and the width of the groove 92 close to the holder 91 is greater than the width of the groove 92 away from the clamping frame 91; each group of grooves 92 is slidably embedded with a boss 93 that matches the outer contour of the groove 92, and all the bosses 93 are fixed on a clamping block 94 of a block-shaped structure, and the clamping block 94 is used to clamp the workpiece.

[0034] In order to facilitate clamping of the conventional workpiece 10 , a side of the clamping block 94 away from the clamping frame 91 is provided with a fitting surface 95 that fits the contour of the clamped conventional workpiece 10 .

[0035] In order to clamp the tubular workpiece 11 so that the center of the tubular workpiece 11 is always located on the central axis plane, a V-shaped cutout structure is provided on the side of the holding block 94 away from the clamping frame 91 to form a V-shaped groove 96 .

[0036] In order to increase the rotation range of the rotating wheel 61, the connecting rod 62 connected to the rotating wheel 61 is an arc-shaped rod-shaped structure, and the arc-shaped openings of the two groups of connecting rods 62 are arranged opposite to each other.

[0037] Brief description of the usage process:

[0038] When in use, the fixing seat 1 is fixed on a working platform with a table structure, and the lifting cylinder 75 is located below the working platform; according to the type of workpiece to be processed, the boss 93, the clamping block 94, the fitting surface 95 as a whole, or the boss 93, the clamping block 94, and the V-groove 96 as a whole are slidably inserted into the groove 92 of the clamping tooth 9.

[0039] The workpiece is placed on the table 71 of the lifting platform 7, and a pneumatic control component is connected to the symmetrical clamping cylinder and the lifting cylinder 75. The symmetrical clamping cylinder 3 is started to extend and retract. The symmetrical clamping cylinder 3 drives the rack 4 connected thereto to move horizontally. The rack 4 drives the meshing gear 52 to rotate. The gear 52 drives the rotating wheel 61 to rotate through the gear shaft 51. The rotating wheel 61 drives the slider 63 to move through two sets of connecting rods 62. Because the two sets of sliders 63 are slidably fitted on the guide rail 81, the sliders 63 driven by the connecting rods 62 will approach or move away from each other at the same time along the guide rail 81, thereby driving the clamping teeth 9 connected to the slider 63 to approach or move away from each other at the same time. Then, the symmetrical clamping cylinder 3 can be extended or shortened to control the clamping teeth to complete the symmetrical clamping or symmetrical opening operation of the conventional workpiece 10 or the tubular workpiece 11.

[0040] When it is necessary to adjust the placement height of the conventional workpiece 10 or the tubular workpiece 11 according to actual conditions, the lifting cylinder 7 can be telescopically moved to drive the table 71, the reinforcing seat 76, the connecting frame 72, and the sliding column 74 to slide up and down along the sliding seat 73 as a whole, thereby adjusting the height of the table 71.

[0041] When the clamping block 94 with the V-groove 96 is used to symmetrically clamp the tubular workpiece 11, it is necessary to extend and lower the cylinder 7, such as Fig. 9 As shown, the tubular workpiece 11 is lifted to a height where its central axis is flush with the bottom of the V-groove 96, so that when the same batch of tubular workpieces 11 are symmetrically clamped by the clamping teeth 9, it can be ensured that the axis of the tubular workpiece 11 is always located on the central axis surface and at the same position.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A symmetrical pneumatic clamp, comprising: A fixed seat (1), a vertical plate (2), a symmetrical clamping cylinder (3), a gear assembly (5), and a guide assembly (8); characterized in that: the fixed seat (1) is a strip plate structure, a vertical plate (2) of a plate structure is fixed on the side of the fixed seat (1), a symmetrical clamping cylinder (3) is fixed on the vertical plate (2) by means of a cylinder bracket (31), a rack (4) is fixed at the telescopic end of the symmetrical clamping cylinder (3), a gear (52) is rotatably matched on the vertical plate (2) through a gear shaft (51), and the rack (4) and the gear (52) are meshed with each other; a symmetrical motion assembly (6) is fixed on the other end of the gear shaft (51), and the symmetrical motion assembly (6) The invention comprises: a rotating wheel (61), a connecting rod (62), and a sliding block (63); the rotating wheel (61) is coaxially fixed on a gear shaft (51); two sides of the rotating wheel (61) are respectively rotatably matched with a connecting rod (62); the other ends of the two groups of connecting rods (62) are respectively rotatably matched with a sliding block (63); the sliding block (63) is slidably matched on a guide rail (81) in a guide assembly (8); the guide assembly (8) further comprises a connecting column (82) and a guide rail platform (83); the guide rail platform (83) is fixed on a vertical plate (2); the connecting column (82) is used to fix the two ends of the guide rail (81) on the guide rail platform (83); and a clamping tooth (9) is fixed on each group of sliding blocks (63).

2. A symmetrical pneumatic clamp according to claim 1, characterized in that: The gear assembly (5) comprises: a gear shaft (51), a gear (52), a top shaft (53), and a top piece bearing (54); a top shaft (53) of a horizontal shaft structure is fixed below the rack (4), and a top piece bearing (54) is rotatably fitted on the top shaft (53), and a bearing surface of the top piece bearing (54) is tangent to the lower plane of the rack (4).

3. A symmetrical pneumatic clamp according to claim 1, characterized in that: The fixed seat (1) is provided with a lifting platform (7), and the lifting platform (7) comprises: a table plate (71), a connecting frame (72), a sliding seat (73), a sliding column (74), and a lifting cylinder (75); at least two groups of sliding seats (73) are fixed on the fixed seat (1), and a sliding column (74) with a columnar structure is slidably matched in each group of sliding seats (73), and the top of the sliding column (74) penetrates the fixed seat (1) and is connected to the connecting frame (72) with a plate structure. A lifting cylinder (75) is fixed below the fixed seat (1), and the telescopic end of the lifting cylinder (75) penetrates the fixed seat (1) and is connected to the middle part of the connecting frame (72), and the connecting frame (72) is connected to the table plate (71) with a flat plate structure.

4. A symmetrical pneumatic clamp according to claim 3, characterized in that: The platform (71) is connected to the connecting frame (72) via a reinforcement seat (76) of a rectangular parallelepiped structure, and both sides of the reinforcement seat (76) are connected to the platform (71) via reinforcement ribs (77) distributed in an array.

5. A symmetrical pneumatic clamp according to claim 1, characterized in that: The clamping teeth (9) include: a clamping frame (91), a groove (92), a boss (93), and a clamping block (94); the clamping frame (91) is a bracket structure, and at least two groups of horizontal grooves (92) are provided on the clamping frame (91), and the width of the groove (92) close to the holding frame (91) is greater than the width of the groove (92) away from the clamping frame (91); a boss (93) that matches the outer contour of the groove (92) is slidably embedded in each group of grooves (92), and all the bosses (93) are fixed on a clamping block (94) of a block-shaped structure.

6. A symmetrical pneumatic clamp according to claim 5, characterized in that: The side of the clamping block (94) away from the clamping frame (91) is provided with a fitting surface (95) that fits the contour of the clamped conventional workpiece (10).

7. A symmetrical pneumatic clamp according to claim 5, characterized in that: A V-shaped cutout structure is provided on one side of the holding block (94) away from the clamping frame (91) to form a V-shaped groove (96).

8. A symmetrical pneumatic clamp according to claim 1, characterized in that: The connecting rod (62) connected to the rotating wheel (61) is an arc-shaped rod-shaped structure, and the arc-shaped openings of the two groups of connecting rods (62) are arranged opposite to each other.

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