Improved finger cylinder

Abstract

An improved finger air cylinder comprises a rectangular cylinder base provided with a piston rod and a sliding table arranged on the rectangular cylinder base, the top of the piston rod is connected with two shifting forks, two finger clamping pieces are arranged in a sliding concave cavity of the sliding table, and the other ends of the shifting forks are connected with the corresponding finger clamping pieces so that the finger clamping pieces can move oppositely or oppositely. First sliding grooves are transversely formed in the inner wall faces of the two sides of the sliding concave cavity, a first upper inclined face and a first lower inclined face which form a 90-degree included angle are arranged at the opening positions of the first sliding grooves, and corresponding second sliding grooves are transversely formed in the finger clamping pieces. A second upper inclined face parallel to the first lower inclined face and a second lower inclined face parallel to the first upper inclined face are arranged at the opening of the second sliding groove, the first upper inclined face and the first lower inclined face are opposite to the second upper inclined face and the second lower inclined face to form a rhombic roller path, and a cylindrical roller installed in an inclined mode is arranged in the rhombic roller path in a matched mode. The finger clamping device is reasonable in overall structure, and the finger clamping piece is high in action stability and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatics, in particular to an improved finger cylinder. Background Art

[0002] Finger cylinders, also known as pneumatic grippers or pneumatic grippers, are actuators that use compressed air as a power source to grip or grab workpieces. Existing finger cylinders use the cylinder to drive two forks to move, and the forks drive the gripper to slide horizontally left and right on the slide, thereby achieving the effect of gripping or grabbing public parts. The gripper and the slide are spherical balls that slide, but the spherical balls have a low load-bearing capacity and are prone to wear. Therefore, the gripper's movement is easily unstable, the structural design is unreasonable, and the cylinder's service life is also short. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model aims to provide an improved finger cylinder with reasonable structure, high action stability of the finger clamping member and long service life.

[0004] The utility model adopts a technical solution to solve its technical problems. An improved finger cylinder comprises a rectangular cylinder seat provided with a piston rod, and a slide arranged on the rectangular cylinder seat, an upper end of the rectangular cylinder seat is transversely provided with an active groove, the top of the piston rod is in the active groove and is connected with two forks, an upper end of the slide is transversely provided with a sliding cavity, two finger clamping members are arranged in the sliding cavity, the other end of the fork is connected with the corresponding finger clamping member so that the finger clamping members can run back to back or towards each other, a first slide groove is transversely provided on the inner wall surfaces on both sides of the sliding cavity, the opening of the first slide groove is set as a first upper inclined surface and a first lower inclined surface forming an angle of 90°, a corresponding second slide groove is transversely provided on the finger clamping member, the opening of the second slide groove is set as a second upper inclined surface parallel to the first lower inclined surface, and a second lower inclined surface parallel to the first upper inclined surface, and a rhombus raceway is relatively formed between the first upper inclined surface, the first lower inclined surface and the second upper inclined surface and the second lower inclined surface, and a cylindrical roller installed obliquely is adapted in the rhombus raceway.

[0005] In the above scheme, cylindrical rollers are used to achieve sliding cooperation between the clamping finger and the slide, and the first upper inclined surface and the first lower inclined surface on the first slide groove and the second upper inclined surface and the second lower inclined surface on the second slide groove form a diamond raceway with an inner angle of 90°, so that the cylindrical roller forms an inclined installation shape. Therefore, after installation, the first upper inclined surface and the second lower inclined surface, and the first lower inclined surface and the second upper inclined surface will fit with the end face and the diameter surface of the cylindrical roller in a diagonal manner. In other words, the cylindrical roller will form surface contact and line contact with the diamond raceway at the same time. Compared with the point contact method in the prior art, it effectively increases the contact area, has stronger bearing capacity, reduces the stress at the contact point, is less prone to wear, and effectively increases the fatigue life of the cylindrical roller and the diamond raceway, ensuring the stability of the movement of the clamping finger, making the overall structural design more reasonable and the service life of the cylinder longer.

[0006] Furthermore, the other ends of the first upper inclined surface and the first lower inclined surface are connected to form a first sharp angle, and the other ends of the second upper inclined surface and the second lower inclined surface are connected to form a second sharp angle.

[0007] In the above solution, by adopting the arrangement of the first sharp angle and the second sharp angle, the shape of the diamond raceway will be relatively simple, so that the processing of the first slide groove and the second slide groove is convenient, thereby achieving the purpose of reducing the processing cost.

[0008] Furthermore, the interior of the first slide groove is set as a first rectangular groove, and the other ends of the first upper inclined surface and the first lower inclined surface are respectively connected to the two ends of the first rectangular groove; the interior of the second slide groove is set as a second rectangular groove, and the other ends of the second upper inclined surface and the second lower inclined surface are respectively connected to the two ends of the second rectangular groove.

[0009] In the above scheme, although the shape of the diamond raceway is complicated, due to the presence of the first rectangular groove and the second rectangular groove, foreign matter or dust can flow into the first rectangular groove and the second rectangular groove as the clamping finger slides, and will not interfere with the cylindrical roller, so that the device can operate stably for a long time, reduce maintenance costs, and improve the working efficiency of the device. When cleaning is required, a strip of iron wire can be inserted into the groove to achieve the cleaning effect, or cleaning can be achieved directly through an air gun. This structure has a stable structure, a long service life, dust or foreign matter will not interfere with the action, and can also make the application range of the clamping finger cylinder wider.

[0010] Furthermore, the first upper inclined surface, the first lower inclined surface, the second upper inclined surface, and the second lower inclined surface are all inclined surfaces inclined at 45°.

[0011] In the above scheme, by adopting a design with an inclination of 45°, the cross-section of the formed diamond raceway is a square structure, so that the height and diameter ratio of the matching cylindrical roller is 1:1. The matching cylindrical roller will have a stronger load-bearing capacity, and during use, the matching spacing between the clamping finger and the sliding cavity will be reasonable, the movement stability of the clamping finger will be higher, and the structural design will be more reasonable.

[0012] Furthermore, roller baffles fixed by screws are connected to both the front and rear side surfaces of the clamping finger member.

[0013] In the above scheme, by providing a roller baffle fixed by screws, the cylindrical roller is easily installed and the cylindrical roller is restricted so that it will not slide out of the sliding cavity, and the structural design is reasonable.

[0014] Furthermore, a clamping groove is transversely opened on the top of the piston rod, and a first mounting hole for installing the first fixed shaft is provided on the wall surface of the clamping groove, the second linkage end of the shift fork is overlapped and arranged on the clamping groove, and an arc-shaped open groove matching the first hinge shaft is provided at the end, and a second mounting hole for installing the second fixed shaft is also provided in the movable groove, and the shift fork is located at the intersection of the first linkage end and the second linkage end and is also provided with a hinge hole matching the second fixed shaft.

[0015] In the above scheme, the first fixed shaft is first fixed to the clamping groove through the first mounting hole. After the piston rod and the rectangular cylinder seat are assembled, the second linkage ends of the two shift forks are overlapped with the first fixed shaft through the arc-shaped open groove. Finally, the second fixed shaft is passed through the second mounting hole and the hinge hole, so that the shift fork can be rotatably set in the movable groove. The installation method of the shift fork is simple and convenient, and the structural design is reasonable.

[0016] Furthermore, the end of the first linkage end of the fork is set as a driving part that is flat front and back, and the left and right sides of the driving part that is flat front and back are set as convex arc surfaces. The bottom of the clamping finger is provided with a connecting groove that matches the driving part, and the bottom of the sliding cavity is also provided with a through groove that connects the connecting groove and the movable groove.

[0017] In the above scheme, the convex arc surface on the front and rear flat driving parts cooperates with the connecting groove to form a point-to-surface effect, so that the linkage effect between the first linkage end of the fork and the clamping finger is better, and compared with the spherical driving part, the molding is also convenient. By setting the through groove, the driving part and the connecting groove can be easily matched.

[0018] In the above scheme, the convex arc surface on the front and rear flat driving parts cooperates with the connecting groove to form a point-to-surface effect, so that the linkage effect between the first linkage end of the fork and the clamping finger is better, and compared with the spherical driving part, the molding is also convenient. By setting the through groove, the driving part and the connecting groove can be easily matched.

[0019] Furthermore, a buffer and a magnetic ring cooperating with a magnetic control switch are provided on the inner end skirt of the piston rod.

[0020] In the above scheme, by arranging a buffer part on the skirt, the problem of damage and slight deformation of the skirt surface of the piston rod due to collision is avoided. By arranging a magnetic ring, the piston rod stroke is controlled by utilizing the principle that the magnetic switch and the magnetic ring are connected at a close distance and disconnected at a long distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a cross-sectional view of the overall structure of one embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0023] Figure 3 It is a schematic diagram of the partial structure coordination of one embodiment of the utility model;

[0024] Figure 4 for Figure 3 Magnified view of section A in (cylindrical roller not shown);

[0025] Figure 5 It is a partial structural coordination schematic diagram of another embodiment of the utility model;

[0026] Figure 6 for Figure 5 Magnified view of part B in FIG. 1 (cylindrical roller not shown).

[0027] In the figure: 1-rectangular cylinder seat, 2-piston rod, 3-slide, 4-movable groove, 5-fork, 6-sliding cavity, 7-clamping finger, 8-first slide groove, 9-first upper inclined surface, 10-first lower inclined surface, 11-second slide groove, 12-second upper inclined surface, 13-second lower inclined surface, 14-diamond raceway, 15-cylindrical roller, 16-first sharp corner, 17-second sharp corner, 18-first rectangular groove, 19-second rectangular groove, 20-roller baffle, 21-clamping groove, 22-first mounting hole, 23-arc-shaped open groove, 24-second mounting hole, 25-hinge hole, 26-driving part, 27-connecting groove, 28-through groove, 29-skirt, 30-buffer, 31-magnetic ring. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the embodiments of the utility model and / or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work. In addition, the orientation only represents the relative position relationship between the components, not the absolute position relationship.

[0029] See also Figures 1 to 6 As shown, an improved finger cylinder comprises a rectangular cylinder seat 1 provided with a piston rod 2, and a slide 3 arranged on the rectangular cylinder seat 1, a movable groove 4 is transversely opened at the upper end of the rectangular cylinder seat 1, the top of the piston rod 2 is in the movable groove 4 and is connected with two forks 5, a sliding cavity 6 is transversely opened at the upper end of the slide 3, two finger clamping members 7 are arranged in the sliding cavity 6, the other end of the fork 5 is connected to the corresponding finger clamping member 7 so that the finger clamping members 7 can run away from or towards each other, more specifically, when the piston rod 2 moves downward, the two forks 5 will drive the two finger clamping members 7 to run towards each other under the action of the piston rod 2 to clamp the workpiece, and when the piston rod 2 moves upward, the two forks 5 will drive the two finger clamping members 7 to run away from each other under the action of the piston rod 2 to loosen the workpiece.

[0030] A first slide groove 8 is transversely opened on the inner wall surfaces on both sides of the sliding cavity 6, and the opening of the first slide groove 8 is set as a first upper inclined surface 9 and a first lower inclined surface 10 that form a 90° angle relative to each other. A corresponding second slide groove 11 is transversely opened on the clamping finger 7, and the opening of the second slide groove 11 is set as a second upper inclined surface 12 parallel to the first lower inclined surface 10, and a second lower inclined surface 13 parallel to the first upper inclined surface 9. That is to say, a 90° angle is also formed relatively between the second upper inclined surface 11 and the second lower inclined surface 12. Therefore, after the matching first slide groove 8 and second slide groove 11 form a correspondence, a rhombus raceway 14 with an inner angle of 90° is relatively formed between the first upper inclined surface 9, the first lower inclined surface 10, the second upper inclined surface 12, and the second lower inclined surface 13, and an inclined cylindrical roller 15 is adapted in the rhombus raceway 14, and the cylindrical roller 15 is used to realize the sliding fit between the clamping finger 7 and the slide table 3. The first upper inclined surface 9 on the first slide groove 8, the first lower inclined surface 10, and the second upper inclined surface 12 and the second lower inclined surface 13 on the second slide groove 11 form a diamond raceway 14 with an inner angle of 90°, so that the cylindrical roller 15 forms an inclined installation form. More specifically, after installation, the first upper inclined surface 9 and the second lower inclined surface 13, and the first lower inclined surface 10 and the second upper inclined surface 12 will fit with the end face and diameter surface of the cylindrical roller 15 in a diagonal manner. In other words, the cylindrical roller 15 will form surface contact and line contact with the diamond raceway 14 at the same time. Compared with the point contact method in the prior art, the contact area is effectively increased, the bearing capacity is stronger, the stress at the contact point is also reduced, and wear is not easy to occur. It also effectively increases the fatigue life of the cylindrical roller 15 and the diamond raceway 14, ensuring the stability of the movement of the clamping finger 7, and the overall structural design is more reasonable and the service life of the cylinder is longer.

[0031] Among them, the other ends of the first upper inclined surface 9 and the first lower inclined surface 10 are connected to form a first sharp angle 16, and the other ends of the second upper inclined surface 12 and the second lower inclined surface 13 are connected to form a second sharp angle 17. With the setting of the first sharp angle 16 and the second sharp angle 17, the shape of the diamond raceway 14 will be relatively simple, so that the processing of the first slide groove 8 and the second slide groove 11 is convenient, thereby achieving the purpose of reducing the processing cost.

[0032] The interior of the first slide groove 8 can also be set as a first rectangular groove 18, and the other ends of the first upper inclined surface 9 and the first lower inclined surface 10 are respectively connected to the two ends of the first rectangular groove 18, and the interior of the second slide groove 11 can also be set as a second rectangular groove 19, and the other ends of the second upper inclined surface 12 and the second lower inclined surface 12 are respectively connected to the two ends of the second rectangular groove 19. Although the setting of the above structure complicates the shape of the diamond raceway 14, due to the existence of the first rectangular groove 18 and the second rectangular groove 19, foreign matter or dust can flow into the first rectangular groove 18 and the second rectangular groove 19 as the clamping finger 7 slides, and will not interfere with the cylindrical roller 15, so that the device can operate stably for a long time, reduce maintenance costs, and improve the working efficiency of the device. When cleaning is needed, a strip of iron wire can be inserted into the groove to achieve a cleaning effect, or cleaning can be directly achieved by an air gun. This structure has a stable structure, a long service life, and dust or foreign matter will not interfere with the action, and it can also make the application range of the clamping finger cylinder wider.

[0033] In the above embodiment, the first upper inclined surface 9, the first lower inclined surface 10, the second upper inclined surface 12, and the second lower inclined surface 13 are all inclined surfaces formed by inclination at 45°. By adopting the design of inclination at 45°, the cross-section of the formed diamond raceway 14 is a square structure, so that the height and diameter ratio of the matching cylindrical roller 15 is 1:1. The matching cylindrical roller 15 will have a stronger load-bearing capacity, and during use, the matching spacing formed between the clamping finger 7 and the sliding cavity 6 will also be of a reasonable size, the action stability of the clamping finger 7 will be higher, and the structural design will be more reasonable.

[0034] In the above embodiment, the front and rear side surfaces of the clamping finger 7 are connected to roller baffles 20 fixed by screws. By setting the roller baffles 20 fixed by screws, the cylindrical roller 15 is easily installed while being restricted and will not slide out of the sliding cavity 6. The structural design is reasonable.

[0035] In the above embodiment, a clamping groove 21 is horizontally opened on the top of the piston rod 2, and a first mounting hole 22 for mounting the first fixed shaft is provided on the wall surface of the clamping groove 21. The second linkage end of the shift fork 5 is overlapped with each other and arranged in the clamping groove 21, and an arc-shaped open groove 23 matching the first hinge shaft is provided at the end. A second mounting hole 24 for mounting the second fixed shaft is also provided in the movable groove 4. The shift fork 5 is located at the intersection of the first linkage end and the second linkage end and is also provided with a hinge hole 25 matching the second fixed shaft. During installation, the first fixed shaft is first fixed to the clamping groove 21 through the first mounting hole 22. After the piston rod 2 and the rectangular cylinder base 1 are assembled, the second linkage ends of the two shift forks 5 are overlapped with the first fixed shaft through the arc-shaped open groove 23. Finally, by passing the second fixed shaft through the second mounting hole 24 and the hinge hole 25, the shift fork 5 can be rotatably set in the movable groove 4. The installation method of the shift fork 5 is simple and convenient, and the structural design is reasonable.

[0036] In the above embodiment, the end of the first linkage end of the fork 5 is set as a front and rear flat driving part 26, and the left and right sides of the front and rear flat driving part 26 are set as convex arc surfaces. The bottom of the clamping finger piece 7 is provided with a connecting groove 27 that matches the driving part 26, and the bottom of the sliding cavity 6 is also provided with a through groove 28 that connects the connecting groove 27 and the movable groove 4. Through the cooperation of the convex arc surface on the front and rear flat driving part 26 and the connecting groove 27, an effect of point and surface resistance is formed, so that the linkage effect between the first linkage end of the fork 5 and the clamping finger piece 7 is better, and relative to the spherical driving part, the molding is also convenient. By setting the through groove 28, the driving part 26 can be conveniently matched with the connecting groove 27. More specifically, the through groove 28 can also form an action limit for the fork 5.

[0037] In the above embodiment, a buffer member 30 and a magnetic ring 31 cooperating with a magnetic control switch are provided on the inner end skirt 29 of the piston rod 2. By providing the buffer member 30 on the skirt 29, the problem of damage and slight deformation of the surface of the skirt 29 of the piston rod 2 due to collision is avoided. By providing the magnetic ring 31, the piston rod stroke is controlled by utilizing the principle that the magnetic control switch and the magnetic ring are connected at a close distance and disconnected at a long distance.

[0038] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An improved finger cylinder, comprising a rectangular cylinder seat (1) provided with a piston rod (2), and a slide (3) provided on the rectangular cylinder seat (1), wherein a movable groove (4) is transversely provided at the upper end of the rectangular cylinder seat (1), the top of the piston rod (2) is in the movable groove (4) and is connected to two forks (5), a sliding cavity (6) is transversely provided at the upper end of the slide (3), two finger clamping members (7) are provided in the sliding cavity (6), a first linkage end of the fork (5) is connected to the corresponding finger clamping member (7) so that the finger clamping members (7) run in opposite directions or in opposite directions, characterized in that: A first slide groove (8) is transversely provided on the inner wall surfaces on both sides of the sliding cavity (6), and the opening of the first slide groove (8) is set as a first upper inclined surface (9) and a first lower inclined surface (10) forming an angle of 90°. A corresponding second slide groove (11) is transversely provided on the clamping finger (7), and the opening of the second slide groove (11) is set as a second upper inclined surface (12) parallel to the first lower inclined surface (10), and a second lower inclined surface (13) parallel to the first upper inclined surface (9), and a rhombus-shaped raceway (14) is relatively formed between the first upper inclined surface (9), the first lower inclined surface (10), the second upper inclined surface (12), and the second lower inclined surface (13), and an inclined cylindrical roller (15) is adapted to be installed in the rhombus-shaped raceway (14).

2. An improved finger cylinder according to claim 1, characterized in that: The first upper inclined surface (9) and the other end of the first lower inclined surface (10) are connected to form a first sharp angle (16), and the second upper inclined surface (12) and the other end of the second lower inclined surface (13) are connected to form a second sharp angle (17).

3. The improved finger cylinder according to claim 1, characterized in that: The interior of the first slide groove (8) is set as a first rectangular groove (18), and the other ends of the first upper inclined surface (9) and the first lower inclined surface (10) are respectively connected to the two ends of the first rectangular groove (18); the interior of the second slide groove (11) is set as a second rectangular groove (19), and the other ends of the second upper inclined surface (12) and the second lower inclined surface (13) are respectively connected to the two ends of the second rectangular groove (19).

4. An improved finger cylinder according to claim 2 or 3, characterized in that: The first upper inclined surface (9), the first lower inclined surface (10), the second upper inclined surface (12), and the second lower inclined surface (13) are all inclined surfaces formed by an inclination of 45°.

5. The improved finger cylinder according to claim 4, characterized in that: The front and rear side surfaces of the finger clamp (7) are both connected with roller baffles (20) fixed by screws.

6. The improved finger cylinder according to claim 1, characterized in that: A clamping groove (21) is transversely formed at the top of the piston rod (2), a first mounting hole (22) for mounting a first fixed shaft is formed on the wall surface of the clamping groove (21), the second linkage end of the shift fork (5) is overlapped with each other and is provided with an arc-shaped open groove (23) matching the first fixed shaft at the end, a second mounting hole (24) for mounting the second fixed shaft is also formed in the movable groove (4), and a hinge hole (25) matching the second fixed shaft is also formed at the intersection of the first linkage end and the second linkage end of the shift fork (5).

7. The improved finger cylinder according to claim 1, characterized in that: The end of the first linkage end of the fork (5) is configured as a front-to-back flat driving portion (26), and the left and right sides of the front-to-back flat driving portion (26) are configured as convex arc surfaces. The bottom of the clamping finger (7) is provided with a connecting groove (27) that matches the driving portion (26), and the bottom of the sliding cavity (6) is also provided with a through groove (28) that communicates with the connecting groove (27) and the movable groove (4).

8. The improved finger cylinder according to claim 1, characterized in that: A buffer member (30) and a magnetic ring (31) cooperating with a magnetic control switch are provided on the inner end skirt (29) of the piston rod (2).

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