A machining jig capable of quick clamping

Abstract

The utility model provides a kind of mechanical processing fixture capable of quick clamping, belongs to mechanical processing fixture technical field, for the quick clamping of machine part.Its technical scheme is: stepper motor is installed in the rear wall middle position of box, one end of driving shaft is connected with the motor shaft of stepper motor, driving gear is installed on driving shaft, passive shaft is installed in the box in the two sides of driving shaft, two passive gears are respectively fixed on two passive shafts, two passive gears are respectively engaged with driving gear, the front end of two passive shafts is connected with two crank wheels and stretches out box front wall, two crank wheels are respectively connected with one end of two crank connecting rods, the other end of two crank connecting rods is connected with the outer end of two sliders, two sliders are respectively embedded in slide, the front end of two sliders is opposite, machine part is clamped between the front end of two sliders.The utility model is simple in structure, convenient to use, can realize quick clamping and loosening processing machine part, can satisfy the demand of quick clamping of machine processing equipment.

Description

Technical Field

[0001] This utility model relates to a machining fixture that can be quickly clamped during the machining process, and belongs to the field of machining fixture technology. Background Technology

[0002] Machining is a process of processing mechanical parts using mechanical equipment. Its purpose is to alter the size, shape, surface characteristics, or performance of mechanical parts to meet design and functional requirements. Common machining equipment includes lathes, drilling machines, milling machines, planers, grinding machines, punching machines, and CNC machine tools, among others. These machines can perform operations such as cutting, stamping, and dicing. During the machining process, fixtures are used to clamp and position the workpiece, ensuring its stable position throughout the process and guaranteeing machining accuracy.

[0003] On some high-speed lathes or CNC machining centers, the requirements for fixtures are more stringent. Not only must the fixtures be securely clamped, but they must also clamp quickly to match the machining speed, thereby significantly improving machining efficiency. Therefore, ordinary reciprocating fixtures cannot meet these requirements, necessitating the development of a high-efficiency fixture capable of rapid clamping and releasing to satisfy the rapid clamping needs of machining equipment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a machining fixture that can be quickly clamped. This fixture can be easily installed on a high-speed lathe or CNC machining center to achieve rapid clamping and release of samples, thereby meeting the requirements of rapid clamping, ensuring machining quality, and improving machining efficiency.

[0005] The technical solution to the above technical problem is:

[0006] A machining fixture capable of rapid clamping includes a housing, a stepper motor, a drive shaft, a drive gear, a driven shaft, a driven gear, a crankshaft, a crank connecting rod, a pin, a slider, and a slide rail. The housing is a hollow cuboid. The stepper motor is mounted in the middle of the rear wall of the housing. The drive shaft is mounted in the middle of the housing, with one end connected to the motor shaft of the stepper motor. The drive gear is mounted on the drive shaft. Driven shafts are installed inside the housing on both sides of the drive shaft, and driven gears are fixed on the two driven shafts respectively. The two driven shafts mesh with the driving gears respectively. The front ends of the two driven shafts extend out of the front wall of the housing. The two crank wheels are fixedly installed on the front ends of the driven shafts outside the housing. One end of the two crank connecting rods is connected to the edge of the two crank wheels by a pin. The other end of the two crank connecting rods is connected to the outer end of the two sliders by a pin. The front walls of the housing above and below the two sliders are respectively fixed with slide rails. The sliders are embedded in the slide rails and the sliders are in sliding fit with the slide rails. The front ends of the two sliders are opposite each other, and the mechanism is clamped between the front ends of the two sliders.

[0007] The aforementioned machining fixture capable of rapid clamping comprises a front cover, a rear cover, a middle frame, and fixing bolts. The front cover and rear cover are rectangular plates, and the middle frame is a rectangular frame located between the front cover and the rear cover. The four corners of the front cover, rear cover, and middle frame have connecting screw holes, and the fixing bolts connect the front cover, middle frame, and rear cover into one unit through the connecting screw holes.

[0008] The aforementioned machining fixture capable of rapid clamping has a stepper motor fixed to the outer surface of the rear cover of the housing. The middle parts of the rear cover and the front cover each have a drive shaft hole. The drive shaft hole of the rear cover is a through hole, while the drive shaft hole of the front cover is a blind hole on the inner wall of the front cover. The two ends of the drive shaft are respectively rotatably engaged with the drive shaft hole. The drive gear is fixedly installed on the drive shaft between the rear cover and the front cover by a flat key.

[0009] The aforementioned machining fixture capable of rapid clamping has driven shaft holes on both sides of the drive shaft hole of the housing. The driven shaft hole of the rear cover of the housing is a blind hole, and the driven shaft hole of the front cover of the housing is a through hole. The diameter of the driven shaft holes matches the diameter of the driven shafts. The rear ends of the two driven shafts are respectively embedded in the blind holes of the two driven shaft holes of the rear cover, and the front ends of the two driven shafts pass through the through holes of the driven shaft holes of the front cover. The front ends of the two driven shafts are respectively mounted with crank wheels via flat keys.

[0010] The aforementioned machining fixture capable of rapid clamping has one end of each of the two crank connecting rods connected to the upper and lower parts of the two crank wheels respectively via pins, and the other end of each of the two crank connecting rods connected to the rear parts of the two sliders respectively via pins.

[0011] The aforementioned machining fixture capable of rapid clamping has slide rail mounting screw holes on the upper and lower parts of the front cover of the box body. The slide rail mounting screw holes are parallel to the length direction of the front cover. The slide rails at both ends of the front cover are composed of a fixing plate and a slide groove, respectively. The fixing plate is a rectangular strip with fixing holes that correspond to the slide rail mounting screw holes on the front cover of the box body. Mounting bolts fix the fixing plate to the slide rail mounting screw holes on the front cover of the box body. The slide groove is an L-shaped long strip. The upper edge of the slide groove is welded to the lower end of the fixing plate, and the lower outer side of the slide groove is perpendicular. The slider is embedded in the L-shaped long strip of the slide groove, and the slider and the inner wall of the slide groove are in sliding fit.

[0012] The aforementioned machining fixture capable of rapid clamping has a cuboid slider. The upper and lower ends of the two cuboid sliders are respectively embedded in the upper and lower slides on both sides of the front cover of the housing. The rear part of the two sliders has an arc-shaped groove, the thickness of the bottom surface of the arc-shaped groove matches the thickness of the crank wheel, and there is a pin hole on the bottom surface of the arc-shaped groove. The pin is connected to the front end of the crank connecting rod through the pin hole. The front ends of the two sliders are arc-shaped, and the arc shape of the front end of the slider matches the diameter of the machine part.

[0013] The beneficial effects of this utility model are:

[0014] The stepper motor of this invention is fixed to the outside of the rear cover of the housing. The motor shaft of the stepper motor is connected to the drive shaft, which can drive the drive shaft and drive gear to rotate. Two driven shafts and driven gears are respectively installed on both sides of the drive shaft. The drive gear drives the two driven shafts to rotate through the two driven gears. The front ends of the two driven shafts are connected to the crank wheels outside the front cover of the housing. The driven shafts can drive the crank wheels to rotate. The rear ends of the two crank connecting rods are respectively connected to the upper and lower parts of the two crank wheels. When the two crank wheels rotate, they can drive the two cranks to move in opposite directions at the same time. The two crank connecting rods can then drive the two sliders to move in opposite directions in the slide rail, clamping and releasing the machined parts.

[0015] This utility model has a simple structure and is easy to use. It can convert the rotation of the stepper motor into the continuous reciprocating motion of the slider through the drive shaft, drive gear, driven shaft, driven gear, crank wheel and crank connecting rod, so as to realize a high-efficiency fixture for quickly clamping and releasing the workpiece, which can meet the needs of rapid clamping of machining equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 yes Figure 1 AA section view;

[0018] Figure 3 yes Figure 2BB section view;

[0019] Figure 4 This is a structural diagram of the front cover.

[0020] The following are the markings in the diagram: 1. Housing; 2. Stepper motor; 3. Drive shaft; 4. Drive gear; 5. Drive gear; 6. Crank wheel; 7. Crank connecting rod; 8. Pin; 9. Slider; 10. Slide rail; 11. Front cover; 12. Rear cover; 13. Intermediate frame; 14. Fixing bolt; 15. Connecting screw hole; 16. Drive shaft hole; 17. Drive shaft hole; 18. Flat key; 19. Slide rail mounting screw hole; 20. Fixing plate; 21. Slide groove; 22. Mounting bolt; 23. Arc-shaped groove; 24. Detailed Implementation

[0021] This utility model consists of a housing 1, a stepper motor 2, a drive shaft 3, a drive gear 4, a driven shaft 5, a driven gear 6, a crank wheel 7, a crank connecting rod 8, a pin 9, a slider 10, and a slide rail 11.

[0022] As shown in the figure, the housing 1 is a hollow cuboid composed of a front cover 12, a rear cover 13, a middle frame 14, and fixing bolts 15. The front cover 12 and the rear cover 13 are rectangular plates, and the middle frame 14 is a rectangular frame located between the front cover 12 and the rear cover 13. The four corners of the front cover 12, the rear cover 13, and the middle frame 14 have connecting screw holes 16, and the fixing bolts 15 connect the front cover 12, the middle frame 14, and the rear cover 13 into one unit through the connecting screw holes 16.

[0023] As shown in the diagram, the stepper motor 2 is installed in the middle position outside the rear cover 13 of the housing 1. The rear cover 13 and the front cover 12 of the housing 1 each have a drive shaft hole 17 in their middle portions. The drive shaft hole 17 in the rear cover 13 is a through hole, while the drive shaft hole 17 in the front cover 12 is a blind hole on the inner wall of the front cover. The two ends of the drive shaft 3 are rotatably engaged with the through hole in the rear cover 13 and the blind hole in the front cover 12, respectively. The drive gear 4 is fixedly installed on the drive shaft 3 between the rear cover 13 and the front cover 12 via a flat key. The motor shaft of the stepper motor 2 is connected to the drive shaft 3, and the stepper motor 2 drives the drive shaft 3 to rotate. The drive gear 4 installed on the drive shaft 3 rotates along with the drive shaft 3.

[0024] As shown in the figure, there are driven shaft holes 18 on both sides of the drive shaft hole 17 of the housing 1. Two driven shafts 5 are installed on both sides of the drive shaft 3 of the housing 1 through the driven shaft holes 18. The driven shaft hole 18 of the rear cover 13 of the housing 1 is a blind hole, and the driven shaft hole 18 of the front cover 12 of the housing is a through hole. The diameter of the driven shaft hole 18 matches the diameter of the driven shaft 5. The rear ends of the two driven shafts 5 are respectively embedded in the blind holes of the two driven shaft holes 18 of the rear cover 13, and the front ends of the two driven shafts 5 pass through the through holes of the driven shaft holes 18 of the front cover 12. The front ends of the two driven shafts 5 are respectively installed with crank wheels 7 through flat keys.

[0025] As shown in the figure, two driven shafts 5 are each fixed with a driven gear 6, which meshes with the driving gear 4. When the driving gear 4 rotates with the driving shaft 3, it drives the driven gear 6 to rotate. The two driven shafts 5 rotate with the two driven gears 6, thereby driving the crank wheels 7 at the front end of the two driven shafts 5 to rotate.

[0026] As shown in the diagram, one end of each of the two crank connecting rods 8 is connected to the edge of each of the two crank wheels 7 by pins 9, and the other end of each of the two crank connecting rods 8 is connected to the outer end of each of the two sliders 10 by pins 9. One end of each of the two crank connecting rods 8 is connected to the upper and lower parts of each of the two crank wheels 7 by pins 9, and the other end of each of the two crank connecting rods 8 is connected to the rear part of each of the two sliders 10 by pins 9. Thus, when the drive shaft 3 and drive gear 4 rotate counterclockwise, the two driven gears 6 and driven shaft 5 rotate clockwise, and the two crank wheels 7 also rotate clockwise. Since the two crank connecting rods 8 are connected to the upper and lower parts of the two crank wheels 7 respectively, when the two crank wheels 7 rotate clockwise, they can drive the two crank connecting rods 8 to move simultaneously to the right and left, respectively. The two crank connecting rods 8 can then drive the two sliders 10 to move towards each other in the slide rail 11, clamping and releasing the machined parts.

[0027] As shown in the figure, slide rails 11 are fixed on the surface of the front cover 12 of the box 1 above and below the two sliders 10, respectively. The sliders 10 are embedded in the slide rails 11, and the two sliders 10 are in sliding engagement with the two slide rails 11 respectively. The front ends of the two sliders 10 are opposite each other, and the machine is clamped between the front ends of the two sliders 10.

[0028] As shown in the figure, two slide rails 11 are fixed to the surface of the front cover 12 of the housing 1 by mounting bolts 23. The upper and lower parts of the front cover 12 of the housing 1 have slide rail mounting screw holes 20, which are parallel to the length direction of the front cover 12. Each slide rail 11 consists of a fixing plate 21 and a slide groove 22. The fixing plate 21 is a rectangular strip with fixing holes that correspond to the slide rail mounting screw holes 20 on the front cover 12. The mounting bolts 23 securely connect the fixing plate 21 to the slide rail mounting screw holes 20 on the front cover 12. The slide groove 22 is an L-shaped long strip. The upper edge of the slide groove 22 is welded to the lower end of the fixing plate 21, and the lower outer side of the slide groove 22 is perpendicular. A slider 10 is embedded inside the L-shaped long strip of the slide groove 22, and the slider 10 slides against the inner wall of the slide groove 22.

[0029] As shown in the figure, the slider 10 is a cuboid. The upper and lower ends of the two sliders 10 are respectively embedded in the upper and lower slide rails 11 on both sides of the front cover 12 of the housing 1, allowing them to slide within the slide rails 11. The rear of each slider 10 has an arc-shaped groove 24 for mounting the crank connecting rod 8. The thickness of the bottom surface of the arc-shaped groove 24 matches the thickness of the crank wheel 7. The two ends of the crank connecting rod 8 are placed on the upper surface of the crank wheel 7 and the bottom surface of the arc-shaped groove 24, respectively. Pin holes are located on the upper surface of the crank wheel 7 and the bottom surface of the arc-shaped groove 24, and pins 9 are connected to the front end of the crank connecting rod 8 through these pin holes. The front ends of the two sliders 10 are arc-shaped, matching the diameter of the machine component, which is clamped between the arc-shaped front ends of the two sliders 10.

[0030] The usage process of this utility model is as follows:

[0031] Before clamping the machine part, select a slider 10 that matches the exterior of the machine part so that the arc shape at the front end of the slider 10 can tightly clamp the two sides of the machine part.

[0032] When clamping the machine part, the stepper motor 2 is started. The motor shaft of the stepper motor 2 drives the drive shaft 3 and the drive gear 4 to rotate. The drive gear 4 drives the two driven shafts 5 to rotate through the two driven gears 6. The two driven shafts 5 drive the crank wheel 7 on the surface of the front cover 12 of the housing 1 to rotate. The two crank wheels 7 drive the two sliders 10 to move left and right in the slide rail 11 through the crank connecting rod 8 respectively. The machine part is clamped between the two sliders 10.

[0033] An embodiment of this utility model is as follows:

[0034] The front cover 12 of the box body 1 is 400mm long, 200mm wide, and 10mm thick;

[0035] The length of the back cover 13 of the box body 1 is 400mm, the width is 200mm, and the thickness is 5mm;

[0036] The middle frame 14 is 400mm long, 200mm wide, and 18mm thick;

[0037] The diameter of the connecting screw hole 16 is an M6 threaded through hole;

[0038] The diameter of the fixing bolt 15 is 6mm and the length is 30mm;

[0039] The model of stepper motor 2 is 86B5401 / 12N / M;

[0040] The diameter of the drive shaft 3 is 40mm and its length is 28mm;

[0041] The pitch circle diameter of the drive gear 4 is 180mm, and its thickness is 8mm;

[0042] The diameter of the passive shaft 5 is 24mm and its length is 38mm;

[0043] The driven gear has a 6-pole diameter of 88mm and a thickness of 8mm;

[0044] The outer diameter of crank wheel 7 is 80mm, the inner diameter is 24mm, and the thickness is 6mm.

[0045] The crank connecting rod 8 has a diameter of 12mm and a length of 80mm;

[0046] The diameter of pin 9 is 8mm and the length is 15mm;

[0047] The slider 10 has a length of 70mm, a width of 100mm, and a height of 50mm;

[0048] The slide groove 22 of slide 11 is 70mm long, 3.5mm wide, and 8mm deep.

[0049] The slide rail mounting screw hole 20 is an M5 threaded through hole.

Claims

1. A machining fixture capable of rapid clamping, characterized in that: It includes a housing (1), a stepper motor (2), a drive shaft (3), a drive gear (4), a driven shaft (5), a driven gear (6), a crank wheel (7), a crank connecting rod (8), a pin (9), a slider (10), and a slide rail (11). The housing (1) is a hollow cuboid. The stepper motor (2) is installed in the middle of the rear wall of the housing. The drive shaft (3) is installed in the middle of the housing (1). One end of the drive shaft (3) is connected to the motor shaft of the stepper motor (2). The drive gear (4) is installed on the drive shaft (3). Driven shafts (5) are installed in the housing (1) on both sides of the drive shaft (3). Driven gears (6) are fixed on the two driven shafts (5) respectively. The two driven gears (6) are respectively connected to the drive shaft (3). The driving gear (4) meshes with each other, the front ends of the two driven shafts (5) extend out of the front wall of the housing, the two crank wheels (7) are fixedly installed on the front ends of the driven shafts (5) outside the housing (1), one end of the two crank connecting rods (8) is connected to the edge of the two crank wheels (7) by pins (9), the other end of the two crank connecting rods (8) is connected to the outer end of the two sliders (10) by pins (9), the upper and lower front walls of the housing are respectively fixed with slide rails (11), the sliders (10) are embedded in the slide rails (11), the sliders (10) are in sliding fit with the slide rails (11), the front ends of the two sliders (10) are opposite each other, and the machine parts are clamped between the front ends of the two sliders (10).

2. The machining fixture capable of rapid clamping according to claim 1, characterized in that: The box body (1) consists of a front cover (12), a rear cover (13), a middle frame (14), and fixing bolts (15). The front cover (12) and the rear cover (13) are rectangular plates, and the middle frame (14) is a rectangular frame. The middle frame (14) is located between the front cover (12) and the rear cover (13). The four corners of the front cover (12), the rear cover (13), and the middle frame (14) have connecting screw holes (16). The fixing bolts (15) connect the front cover (12), the middle frame (14), and the rear cover (13) into one unit through the connecting screw holes (16).

3. The machining fixture capable of rapid clamping according to claim 2, characterized in that: The stepper motor (2) is fixed on the outer surface of the rear cover (13) of the housing (1). The middle part of the rear cover (1) and the front cover (12) have drive shaft holes (17). The drive shaft hole (17) of the rear cover (13) is a through hole, and the drive shaft hole (17) of the front cover (12) is a blind hole on the inner wall of the front cover. The two ends of the drive shaft (3) are respectively rotated with the drive shaft hole (17). The drive gear (4) is fixedly installed on the drive shaft (3) between the rear cover (13) and the front cover (12) by a flat key (19).

4. The machining fixture capable of rapid clamping according to claim 3, characterized in that: The housing (1) has passive shaft holes (18) on both sides of the active shaft hole (17). The passive shaft hole (18) of the rear cover (13) of the housing (1) is a blind hole, and the passive shaft hole (18) of the front cover (12) of the housing (1) is a through hole. The diameter of the passive shaft hole (18) matches the diameter of the passive shaft (5). The rear ends of the two passive shafts (5) are respectively embedded in the blind holes of the two passive shaft holes (18) of the rear cover (13). The front ends of the two passive shafts (5) pass through the through hole of the passive shaft hole (18) of the front cover (12). The front ends of the two passive shafts (5) are respectively mounted with crank wheels (7) through flat keys (19).

5. The machining fixture capable of rapid clamping according to claim 4, characterized in that: One end of each of the two crank connecting rods (8) is connected to the upper and lower parts of the two crank wheels (7) by a pin (9), and the other end of each of the two crank connecting rods (8) is connected to the rear of the two sliders (10) by a pin (9).

6. The machining fixture capable of rapid clamping according to claim 5, characterized in that: The upper and lower parts of the front cover (12) of the box body (1) are respectively provided with slide mounting screw holes (20). The slide mounting screw holes (20) are parallel to the length direction of the front cover (12). The slides (11) at both ends of the front cover (12) are respectively composed of a fixing plate (21) and a slide groove (22). The fixing plate (21) is a rectangular strip. The fixing plate (21) has fixing holes. The fixing holes are parallel to the slide mounting screw holes (20) of the front cover (12) of the box body (1). Correspondingly, the mounting bolts (23) fix the fixing plate (21) to the slide mounting screw holes (20) of the front cover (12) of the box body (1). The slide groove (22) is an L-shaped long strip. The upper edge of the slide groove (22) is welded to the lower end of the fixing plate (21). The lower outer side of the slide groove (22) is vertical. The slider (10) is embedded in the L-shaped long strip of the slide groove (22). The slider (10) and the inner wall of the slide groove (22) are in sliding fit.

7. The machining fixture capable of rapid clamping according to claim 6, characterized in that: The slider (10) is a cuboid. The upper and lower ends of the cuboids of the two sliders (10) are respectively embedded in the upper and lower slides (11) on both sides of the front cover (12) of the housing (1). The rear part of the two sliders (10) has an arc-shaped groove (24). The thickness of the bottom surface of the arc-shaped groove (24) matches the thickness of the crank wheel (7). There is a pin hole on the bottom surface of the arc-shaped groove (24). The pin (9) is connected to the front end of the crank connecting rod (8) through the pin hole. The front ends of the two sliders (10) are respectively arc-shaped. The arc shape of the front end of the slider (10) matches the diameter of the machine part.

Images