Pneumatic clamp for machining gauge rod seat

Abstract

A pneumatic clamp for machining a gauge rod seat is characterized in that the pneumatic clamp is composed of a bridge plate, a base, a positioning seat, a clamping seat and an air cylinder, the bridge plate is a flat plate, a base fixing hole, a positioning seat fixing hole, a clamping seat fixing hole, an air cylinder fixing hole and an air cylinder piston moving hole are formed in the bridge plate, the base, the positioning seat and the clamping seat are fixed to the upper surface of the bridge plate, and the air cylinder is fixed to the lower surface of the bridge plate. The base and the clamping seat are fixed to the two sides of the positioning seat respectively, and the air cylinder shaft is connected with the clamping seat. The two sides of the clamping seat are respectively provided with a positioning seat, and the base, the positioning seat, the clamping seat, the positioning seat and the base are arranged in sequence. The utility model has the advantages of simple structure, convenience in operation, high reliability, low labor intensity of workers and high safety coefficient, and can effectively ensure the positioning accuracy of the gauge rod seat and the clamping force of the clamp; and meanwhile, the original single station is changed into double stations, so that the production efficiency is obviously improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model patent relates to the field of firearms manufacturing, and in particular to a fixture for processing AK series sight bases. Background Technology

[0002] As an important component of firearms, the sight base has the following structure: Figure 1 As shown, it requires a certain level of machining accuracy. Our company currently has the following fixtures for machining scale mounts: Figure 2 As shown, the scale holder 6 is placed on the positioning block 7. The rotating screw 8 drives the T-shaped slider 91 of the clamping block 9 to slide against the T-shaped groove 10 of the base plate, thus clamping the scale holder. The clamping force is applied manually; insufficient clamping force can easily cause the scale holder to fly out of the fixture during processing, posing a safety hazard. Furthermore, each time the scale holder is disassembled and assembled, the screw must be rotated manually, increasing operator fatigue. In addition, the original fixture can only clamp a small number of scale holders at a time, resulting in low production efficiency and failing to meet production needs. Summary of the Invention

[0003] The purpose of this utility model is to overcome the defects of existing dial gauge holder clamps and provide a pneumatic clamp that is easy to operate, highly reliable, reduces the labor intensity of workers, and is safe for processing dial gauge holders.

[0004] The technical solution adopted in this utility model is a pneumatic clamp for processing dial gauge bases. Its key features are: it consists of a bridge plate, a base, a positioning seat, a clamping seat, and a cylinder. The bridge plate is a flat plate with base fixing holes, positioning seat fixing holes, clamping seat fixing holes, cylinder fixing holes, and cylinder piston movement holes. The base, positioning seat, and clamping seat are fixed on the upper surface of the bridge plate, and the cylinder is fixed on the lower surface. The base and clamping seat are respectively fixed on both sides of the positioning seat, and the cylinder shaft is connected to the clamping seat.

[0005] Compared with existing dial gauge holder clamps, this utility model replaces the traditional single manual locking with a combination of pneumatic and manual locking, and changes the original single horizontal clamping to a clamping method that combines vertical and horizontal clamping. By applying horizontal clamping force pneumatically, the horizontal clamping force is guaranteed, and by increasing the vertical locking force, the stability and safety of the clamp are further enhanced.

[0006] There is a positioning seat on each side of the clamping seat. The two positioning seats are centrally symmetrical, with the left base, left positioning seat, clamping seat, right positioning seat, and right base arranged in sequence.

[0007] The scale holder is fixed on the positioning seat. One positioning seat means that one scale holder can be processed. This utility model has a positioning seat on each side of the clamping seat. By using one clamping seat to clamp two positioning seats, it means that one fixture can clamp two scale holders at the same time, which can provide a dual-station and significantly improve production efficiency.

[0008] The base has mounting holes for connecting to the bridge plate and a dial indicator seat limiting boss located on the side of the positioning base. The dial indicator seat limiting boss is the surface that contacts the dial indicator seat. Designing it as a boss reduces the number of machining surfaces while ensuring accurate positioning.

[0009] The positioning seat consists of a positioning seat body, a clamping block, a spring, a locking bolt, and a clamping bolt. The positioning seat body has a positioning seat body mounting hole for connecting with the bridge plate, a clamping block clearance square hole, a locking bolt threaded countersunk hole, and a clamping bolt clearance hole. The clamping block has a clamping block threaded hole connected to the clamping bolt. The clamping block is placed in the clamping block clearance square hole of the positioning seat body. The spring and the clamping bolt are placed in the clamping bolt clearance hole of the positioning seat body. The clamping bolt is connected to the clamping block threaded hole. The spring is located below the clamping bolt. The locking bolt enters from the threaded countersunk hole on the top of the positioning seat body and contacts the clamping block.

[0010] The clamping block is used to clamp the lower end face of the scale holder. The upper locking bolt is used for clamping, while the lower spring is used to raise the clamping block when the locking bolt is loosened to fix the scale holder, making it easier to remove the scale holder.

[0011] The positioning seat body surface below the clamping block is machined with a positioning boss that matches the bottom surface of the dial indicator seat. The positioning boss reduces the machining area of ​​the positioning surface and also limits the positioning of the bottom of the dial indicator seat.

[0012] The clamping seat consists of a clamping seat base, a clamping wedge block, a wedge block, and a cover plate. The clamping seat base has a clamping seat base mounting hole for connecting to the bridge plate, a cover plate fixing hole, and a clamping seat base square hole for mounting the wedge block and the clamping wedge block. There is a wedge block on each side of the clamping wedge block. The clamping wedge block has a clamping wedge block threaded hole for connecting to the cylinder piston rod, and a clamping wedge block T-shaped slider that slides with the wedge block. The clamping wedge block T-shaped slider has grooves on both sides that are parallel to the clamping wedge block T-shaped slider. The wedge block has a wedge block T-shaped groove that slides with the clamping wedge block. The shoulders on both sides of the wedge block T-shaped groove cooperate with the groove. The cover plate has a cover plate mounting hole for connecting to the clamping seat base and an oil hole for adding lubricating fluid. There is a gap between the bottom surface of the cover plate and the top surface of the clamping wedge block.

[0013] The inclined surfaces of the clamping blocks of the clamping seat allow the clamping blocks to convert the vertical up-and-down motion brought by the cylinder piston rod into the horizontal motion of the inclined blocks, which becomes the clamping force of the scale seat. The distance between the bottom surface of the cover plate and the top surface of the clamping blocks is related to the inclined surface angle of the inclined blocks and the horizontal opening displacement of the inclined blocks.

[0014] The cylinder is a standard part, and the piston rod of the cylinder is connected to the threaded hole of the clamping wedge block, which pushes the clamping wedge block to move up and down.

[0015] The beneficial effects of this utility model are: simple structure, easy operation, and reliable use. The clamping inclined block of the clamping seat is connected to the piston rod of the cylinder. The cylinder pushes the clamping inclined block to move upward, thereby causing the inclined block to move horizontally to both sides, thus clamping the dial gauge seat. This can effectively ensure the positioning accuracy of the dial gauge seat and the clamping force of the fixture. The labor intensity of workers is low and the safety factor is high. At the same time, it changes from the original single station to a double station, which significantly improves production efficiency and reduces production costs. Attached Figure Description

[0016] Figure 1 Schematic diagram of the scale base structure

[0017] Figure 2 Schematic diagram of the existing tooling structure

[0018] Figure 3 This is a structural schematic diagram of the present utility model patent.

[0019] Figure 4 This is a schematic diagram of the bridge plate of this utility model patent.

[0020] Figure 5 This is a schematic diagram of the base structure of the present utility model patent.

[0021] Figure 6 This is a schematic diagram of the positioning seat of this utility model patent.

[0022] Figure 7 for Figure 6 Partial sectional view

[0023] Figure 8 This is a schematic diagram of the clamping seat of this utility model patent.

[0024] Figure 9 This is a schematic diagram of the usage state of this utility model patent.

[0025] Among them: 1 Bridge plate 11 Base fixing hole 12 Positioning seat fixing hole 13 Clamping seat fixing hole 14 Cylinder fixing hole 15 Cylinder piston moving hole 2 Base 21 Base mounting hole 22 Dial gauge seat limiting boss 3 Positioning seat 31 Positioning seat body 32 Pressure block 33 Spring 34 Locking bolt 35 Pressure bolt 311 Positioning seat body mounting hole 312 Pressure block clearance square hole 313 Threaded countersunk hole 314 Pressure bolt clearance hole 315 Positioning seat body upper end face 316 Dial gauge seat limiting surface 317 Positioning boss 321 Pressure block threaded hole 4 Clamping seat 41 Clamping seat base 42 Clamping wedge block 43 Wedge block 44 Cover plate 411 Clamping seat base mounting hole 412 Cover plate fixing hole 413 Clamping seat base square hole 421 Clamping wedge block threaded hole 422 Clamping inclined block T-slider 423 Groove 431 Inclined block T-slot 432 Shoulder 441 Cover plate mounting hole 442 Oil hole 5 Cylinder 6 Dashboard seat 61 Lower end face of gun barrel hole 62 Dashboard seat limiting step 63 Lower end face of dashboard seat 64 Left plane of dashboard seat 65 Right plane of dashboard seat 7 Positioning block 8 Screw 9 Clamping block 91 Clamping block T-slider 10 Base plate T-slot. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the drawings. The following embodiments will enable those skilled in the art to better understand the present invention, but will not limit the present invention in any way. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0027] like Figure 3 As shown, this utility model is a method for processing such as Figure 1The pneumatic clamp for the dial gauge holder shown changes the traditional single manual locking method. It combines pneumatic and manual locking, and changes the clamping from horizontal to a combination of horizontal and vertical clamping, making the dial gauge holder more reliable during processing.

[0028] It consists of a bridge plate 1, a base 2, a positioning seat 3, a clamping seat 4, and a cylinder 5. The entire fixture is arranged symmetrically along an axis. There is a positioning seat on each side of the clamping seat. Above the bridge plate 1, from left to right, are placed the left base 2, the left positioning seat 3, the clamping seat 4, the right positioning seat 3, and the right base 2. The two positioning seats 3 are centrally symmetrical, with one facing forward and the other facing backward. Clamping wedges 42 and 43 are placed in the square hole 413 of the clamping seat base. The bottom of the clamping wedges is connected to the piston rod of the cylinder. The clamping wedges 42 and 43 slide through a T-shaped slider and a T-slot. The forward and backward extension of the cylinder 5 moves the clamping wedges up and down, thereby moving the wedges horizontally to achieve a horizontal clamping effect. The clamping block 32 is placed in the clamping block clearance square hole 312. The spring 33 and the clamping bolt 35 are placed in the clamping bolt clearance hole 314 of the positioning seat body. The clamping bolt is connected to the threaded hole 321 of the clamping block. By rotating the locking bolt 34, the locking bolt forces the clamping block downward to press against the lower end face 63 of the scale seat, achieving the effect of vertically clamping the scale seat. When the locking bolt is released, the spring causes the clamping block to return to its original position, achieving the clamping release effect.

[0029] The components are described in detail below with reference to the accompanying drawings.

[0030] like Figure 4 As shown, the bridge plate 1 is composed of a horizontal flat plate. The bridge plate has fixing holes 11 for fixing to the base, positioning holes 12 for fixing to the positioning seat, fixing holes 13 for fixing to the clamping seat base, fixing holes 14 for fixing to the cylinder, and a movable hole 15 in the middle of the bridge plate through which the cylinder piston rod can pass, so as to facilitate the connection between the cylinder and the clamping wedge and make the piston rod move up and down smoothly.

[0031] like Figure 5 As shown, the base has holes 21 for mounting the bridge plate and a limiting boss 22 for limiting the gauge seat. The two bases are distributed symmetrically at both ends of the bridge plate, serving as auxiliary clamping mechanisms for the gauge seat, and are located on both sides of the positioning base 3, separate from the clamping base.

[0032] like Figure 6 , 7As shown, the positioning seat 3 consists of a positioning seat body 31, a locking bolt 34, a clamping block 32, a clamping bolt 35, and a spring 33. The positioning seat body 31 has a positioning seat body mounting hole 311 for mounting to the bridge plate, a clamping block clearance square hole 312 for placing the clamping block, a threaded countersunk hole 313 for engaging the locking bolt, and a clamping bolt clearance hole 314 for placing the clamping bolt and the spring. The threaded countersunk hole 313, the clamping block clearance square hole 312, and the clamping bolt clearance hole 314 are on the same axis. The clamping block 32 has a clamping block threaded hole 321 for connecting to the clamping bolt. The diameter of the threaded end of the locking bolt 34 is larger than the inner diameter of the threaded hole 321, and the length of the threaded end of the clamping bolt 35 is shorter than the depth of the threaded hole 321, to ensure that the locking bolt 34 presses against the upper surface of the clamping block 32. A positioning boss 317, adapted to the bottom surface of the scale holder, is machined on the surface of the positioning seat body 31 below the clamping block 32. The positioning boss reduces the machining area of ​​the positioning surface and limits the movement of the scale holder bottom. A spring 33 is placed in the clamping bolt clearance hole 314, and a clamping bolt 35 connected to the clamping block is placed on top of the spring. The spring is initially pre-compressed. A locking bolt 34 controls the downward movement of the clamping block. Rotating the locking bolt 34 clockwise moves the locking bolt downward, causing the clamping block 32 to move downward and press against the rear end face 63 of the scale holder. The downward movement of the clamping block causes the clamping bolt to move downward, compressing the spring. Rotating the locking bolt counterclockwise moves the locking bolt upward, the spring returns to its original position, causing the clamping bolt to move upward, thus moving the clamping block upward and releasing the clamping force.

[0033] like Figure 8 As shown, the clamping seat 4 consists of a clamping seat base 41, a clamping wedge 42, a wedge 43, and a cover plate 44. The clamping seat base has a clamping seat base mounting hole 411 for connecting to the bridge plate, a cover plate fixing hole 412 for fixing to the cover plate, and a clamping seat base square hole 413 for placing the clamping wedge and the wedge. The clamping wedge block 42 has a wedge block 43 on each side. Each wedge block has a threaded hole 421 connected to the cylinder piston rod, and a T-shaped slider 422 that slides in conjunction with the wedge block. The T-shaped slider 422 has grooves 423 parallel to it on both sides. The wedge block has a T-shaped groove 431 that slides in conjunction with the clamping wedge block. Shoulders 432 on both sides of the T-shaped groove 431 engage with the grooves 423. The cover plate has a cover plate mounting hole 441 connected to the clamping seat base, and an oil hole 442 for adding lubricating fluid. There is a gap between the bottom surface of the cover plate 44 and the top surface of the clamping wedge block 42. The T-shaped grooves of the wedge blocks connect to the T-shaped sliders of the clamping wedge blocks, allowing for sliding. The tail end of the clamping wedge block is connected to a cylinder. The intake and exhaust of the cylinder causes the piston rod to move back and forth, thus moving the wedge blocks horizontally to both sides, achieving the clamping effect.

[0034] The inclined surfaces of the clamping blocks of the clamping seat allow the clamping blocks to convert the vertical up-and-down motion brought by the cylinder piston rod into the horizontal motion of the inclined blocks, which becomes the clamping force of the scale seat. The distance between the bottom surface of the cover plate and the top surface of the clamping blocks is related to the inclined surface angle of the inclined blocks and the horizontal opening displacement of the inclined blocks.

[0035] The cylinder is a standard part. The piston rod of the cylinder is connected to the threaded hole 421 of the clamping wedge block, which pushes the clamping wedge block to move up and down.

[0036] like Figure 9 As shown, the specific application process of this utility model is as follows:

[0037] First, fix the base 2 to both ends of the bridge plate 1 by aligning it with the holes in the bridge plate. Place the clamping block 32 into the clamping block clearance square hole 312 of the positioning seat body, and connect the clamping bolt 35 to the clamping block 32 through the clamping bolt clearance hole 314. Place the spring 33 under the clamping bolt, with the lower part of the spring contacting the bridge plate 1, and fix it by aligning it with the holes in the positioning seat body through the fixing hole on the bridge plate 1. Connect the locking bolt 34 to the threaded countersunk hole 313. Fix the two positioning seats 3 to both sides of the clamping seat 4 in the same way, arranged symmetrically. The clamping base 41 is fixed to the bridge plate through the bridge plate holes. Clamping wedges 42 and 43 are placed in the square holes 413 of the clamping base. The clamping wedges are connected by T-shaped sliders 422 and T-slots 431. The tail end of the clamping wedges is connected to the cylinder piston rod. The cylinder 5 is fixed to the bottom of the bridge plate through the bridge plate holes. The cover plate 44 is fixed to the clamping base holes. The lower plane 61 of the gauge mount's barrel hole is placed against the upper end face 315 of the positioning base body. The gauge mount's limiting step 62 is in contact with the positioning base body's limiting surface 316. The left plane 64 of the gauge mount is in contact with the limiting boss 22 of the base. By rotating the locking bolt 34 clockwise, the clamping block 32 moves down to press against the lower end face 63 of the gauge mount. The two gauge mounts are fixed to the positioning base in the same way. When air enters the rodless chamber of the cylinder, it moves the piston rod forward, causing the clamping wedge block 42 to move upward. This causes the two wedge blocks 43 distributed on the clamping wedge block to move horizontally outward, engaging with the right plane 65 of the dial indicator base and applying clamping force to achieve the clamping effect. After machining, air enters the rod chamber of the cylinder, causing the piston rod to move backward, causing the clamping wedge block to move downward. This causes the two wedge blocks to move horizontally inward, separating from the right plane of the dial indicator base. Rotating the locking bolt counterclockwise moves the locking bolt upward, causing the spring to reset and push the clamping block upward, separating it from the lower end face of the dial indicator base, allowing the dial indicator base to be removed.

Claims

1. A pneumatic clamp for machining a scale holder, characterized in that: It consists of a bridge plate (1), a base (2), a positioning seat (3), a clamping seat (4), and a cylinder (5). The bridge plate is a flat plate with a base fixing hole (11), a positioning seat fixing hole (12), a clamping seat fixing hole (13), a cylinder fixing hole (14), and a cylinder piston moving hole (15). The base (2), the positioning seat (3), and the clamping seat (4) are fixed on the upper surface of the bridge plate, and the cylinder (5) is fixed on the lower surface. The base (2) and the clamping seat (4) are fixed on both sides of the positioning seat (3), and the cylinder (5) shaft is connected to the clamping seat (4).

2. A pneumatic clamp for machining a scale holder according to claim 1, characterized in that: in There is a positioning seat (3) on each side of the clamping seat (4). The two positioning seats (3) are centrally symmetrical. The base (2) on the left, the positioning seat (3) on the left, the clamping seat (4), the positioning seat (3) on the right, and the base (2) on the right are arranged in sequence.

3. A pneumatic clamp for machining a scale holder according to claim 1, characterized in that: The base has a base mounting hole (21) for connecting to the bridge plate and a scale seat limiting boss (22), with the scale seat limiting boss (22) located on the side of the positioning seat (3).

4. A pneumatic clamp for machining a scale holder according to claim 1, characterized in that: The positioning seat consists of a positioning seat body (31), a clamping block (32), a spring (33), a locking bolt (34), and a clamping bolt (35). The positioning seat body has a positioning seat body mounting hole (311) for connecting with the bridge plate, a clamping block clearance square hole (312), a locking bolt thread countersunk hole (313), and a clamping bolt clearance hole (314). The clamping block has a clamping block thread hole (321) connected to the clamping bolt. The clamping block (32) is placed in the clamping block clearance square hole (312) of the positioning seat body. The spring (33) and the clamping bolt (35) are placed in the clamping bolt clearance hole (314) of the positioning seat body. The clamping bolt is connected to the clamping block thread hole (321). The spring (33) is located below the clamping bolt (35). The locking bolt (34) enters from the thread countersunk hole (313) above the positioning seat body (31) and contacts the clamping block.

5. A pneumatic clamp for machining a scale holder according to claim 4, characterized in that: The positioning seat body (31) below the clamping block (32) has a positioning boss (317) that is adapted to the bottom surface of the scale seat.

6. A pneumatic clamp for machining a scale holder according to claim 2, characterized in that: The clamping seat consists of a clamping seat base (41), a clamping wedge (42), a wedge (43), and a cover plate (44). The clamping seat base has a clamping seat base mounting hole (411) for connecting to the bridge plate, a cover plate fixing hole (412), and a clamping seat base square hole (413) for installing the wedge and the clamping wedge. There is a wedge (43) on each side of the clamping wedge (42). The clamping wedge (42) has a clamping wedge threaded hole (421) for connecting to the cylinder piston rod and a clamping wedge T that slides with the wedge. The sliding block (422) has grooves (423) on both sides of the clamping inclined block T-shaped sliding block (422) that are parallel to the clamping inclined block T-shaped sliding block (422). The inclined block has an inclined block T-shaped groove (431) that cooperates with the sliding of the clamping inclined block. The protruding shoulders (432) on both sides of the inclined block T-shaped groove (431) cooperate with the groove (423). The cover plate has a cover plate mounting hole (441) that connects to the clamping seat base and an oil hole (442) for adding lubricating fluid. The bottom surface of the cover plate (44) is spaced from the top surface of the clamping inclined block (42).

7. A pneumatic clamp for machining a scale holder according to claim 1, characterized in that: The cylinder is a standard part. The piston rod of the cylinder is connected to the threaded hole (421) of the clamping wedge block, which pushes the clamping wedge block to move up and down.

Images