A clamping claw for clamping a gear

Abstract

The present invention discloses a clamping claw for clamping gears, belonging to the technical field of manipulators, comprising a connecting rod, at least three guide rails and at least three clamping assemblies, all of which are evenly fixed to the lower end of the connecting rod in the circumferential direction; the clamping assembly comprises a clamping arm and a positioning rod, a supporting arm is slidably mounted at the bottom of the clamping arm, a movable plate is hinged at the bottom of the positioning rod, and a linkage structure is arranged between the movable plate and the supporting arm. The clamping assembly designed by the present invention comprises a clamping arm, a positioning rod and a supporting arm, when the clamping arm moves along the guide rail, the clamping arm can abut against the tooth surface of the spur gear, so that it can be used to clamp the spur gear, and when the present invention is used to clamp a bevel gear, the positioning rod moves downward, so that the movable plate can abut against the inclined tooth surface of the bevel gear, and then through the linkage structure, the supporting arm is extended under the bevel gear, so that the bevel gear can be lifted, and the pressure plate arranged by the present invention can also abut against the middle upper surface of the bevel gear, so as to cooperate with the supporting arm to stably clamp the bevel gear.

Description

Technical Field

[0001] The invention relates to the technical field of manipulators, and in particular to a clamping claw for clamping gears. Background Art

[0002] Gears need to be transported from the conveyor line during the production process. The conventional clamping tool is a two-finger closed mechanical clamp, which uses two clamps to clamp the gear. However, for bevel gears, the existing two-finger closed mechanical clamp has the problem of small clamping area and the clamping surface is not perpendicular to the gear surface, which makes the gear clamp unstable and easy to fall. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, an object of the present invention is to provide a clamping jaw for clamping gears, which is suitable for clamping bevel gears and spur gears.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a clamping claw for clamping a gear, comprising:

[0005] A connecting rod, the connecting rod is used to connect the industrial robot;

[0006] At least three guide rails, all of which are evenly fixed to the lower end of the connecting rod in the circumferential direction;

[0007] At least three clamping assemblies, each of which corresponds to the guide rail one by one, and each of which comprises a clamping arm and a positioning rod, wherein the clamping arm is slidably mounted on the guide rail, the positioning rod can move along the clamping arm, a supporting arm is slidably mounted on the bottom of the clamping arm, a movable plate is hingedly connected to the bottom of the positioning rod, and a linkage structure is provided between the movable plate and the supporting arm;

[0008] A pressure plate, the pressure plate is lifted and arranged at the bottom of the connecting rod;

[0009] Wherein, the movable plate is perpendicular to the clamping arm in an initial state; the movable plate moves with the positioning rod, and when the movable plate rotates, the movable plate enables the supporting arm to move on the clamping arm through a linkage structure.

[0010] Preferably, the linkage structure comprises:

[0011] A lifting seat, the lifting seat is fixed on the top of the positioning rod, and the lifting seat is slidably mounted on the clamping arm;

[0012] A driving block, wherein the driving block is slidably mounted on the lifting seat, a driving portion is arranged on the top of the driving block, a first connecting rod is hinged on the driving block, and an end of the first connecting rod away from the driving block is hinged on the movable plate;

[0013] A slide seat, the slide seat is slidably mounted on the lifting seat, and a driving groove matched with the driving part is provided on the slide seat;

[0014] A transmission rod, the transmission rod is slidably mounted on the slide seat, and the bottom of the transmission rod is fixedly connected to the supporting arm;

[0015] When the movable plate rotates around the hinge shaft between the positioning rod and the movable plate, the first connecting rod drives the sliding seat to move through the driving block, so that the supporting arm moves perpendicular to the clamping arm.

[0016] Preferably, a first cylinder is fixed on the clamping arm, and a movable end of the first cylinder is fixedly connected to the lifting seat.

[0017] Preferably, a sliding sleeve is sleeved on the connecting rod, a second cylinder is arranged on the connecting rod, a movable end of the second cylinder is fixedly connected to the sliding sleeve, a second connecting rod is hinged on the clamping arm, and the second connecting rod is hinged to the sliding sleeve.

[0018] Preferably, a flange is fixed to one end of the connecting rod away from the guide rail, and the second cylinder is fixed on the flange.

[0019] Preferably, the positioning rod is located on a side of the clamping arm close to the pressure plate.

[0020] Preferably, a first limiting portion is fixed to the bottom of the positioning rod, a second limiting portion is fixed to the movable plate, and an elastic member for making the second limiting portion abut against the first limiting portion is arranged between the positioning rod and the movable plate. When the second limiting portion abuts against the first limiting portion, the movable plate is perpendicular to the positioning rod.

[0021] Preferably, a third cylinder is fixed to the bottom of the connecting rod, and the pressure plate is fixed to the movable end of the third cylinder.

[0022] The beneficial effects of the present invention are:

[0023] The clamping assembly designed in the present invention includes a clamping arm, a positioning rod and a supporting arm. When the clamping arm moves along the guide rail, the clamping arm can rest on the tooth surface of the spur gear, so that it can be used to clamp the spur gear. When the present invention is used to clamp the bevel gear, the positioning rod moves downward, so that the movable plate can rest on the inclined tooth surface of the bevel gear, and then through the linkage structure, the supporting arm is extended under the bevel gear, so that the bevel gear can be lifted. The pressure plate provided in the present invention can also rest on the middle upper surface of the bevel gear, so as to cooperate with the supporting arm to stably clamp the bevel gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A three-dimensional diagram of a clamping jaw for clamping a gear provided in an embodiment of the present invention.

[0026] Figure 2 It is a top view of the present invention.

[0027] Figure 3 for Figure 2 Cross-sectional view at AA in the middle.

[0028] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0029] Figure 5 It is a schematic diagram of the present invention when clamping a spur gear.

[0030] Figure 6 It is a schematic diagram of the present invention when clamping a helical gear.

[0031] Figure 7 It is a schematic diagram of the present invention when pressing the tilted gear.

[0032] Description of reference numerals:

[0033] 1. Connecting rod, 2. Guide rail, 3. Clamp arm, 4. Positioning rod, 5. Support arm, 6. Movable plate, 7. Pressure plate, 8. Lifting seat, 9. Driving block, 10. Driving part, 11. Driving groove, 12. Transmission rod, 13. First cylinder, 14. Sliding sleeve, 15. Second cylinder, 16. Second connecting rod, 17. Flange, 18. First limiting part, 19. Second limiting part, 20. Third cylinder, 21. First connecting rod, 22. Sliding seat. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] like Figures 1 to 7 As shown, embodiment 1 of the present invention provides a clamping claw for clamping gears, including a connecting rod 1, three guide rails 2 fixed to the lower end of the connecting rod 1, and three clamping assemblies, wherein a flange 17 is fixed to the top end of the connecting rod 1, and the present invention can be connected to an industrial robot through the flange 17, so that the industrial robot can be used to move the present invention, including overall lifting and horizontal displacement.

[0037] like Figure 1 As shown, the three clamping assemblies correspond to the three guide rails 2 respectively. Each clamping assembly includes a vertical clamping arm 3, and the clamping arm 3 is slidably mounted on the guide rail 2. In order to drive the three clamping arms 3 to move at the same time, the present invention is provided with a sleeve 14 on the connecting rod 1, and the sleeve 14 is slidably matched with the connecting rod 1. A second cylinder 15 is fixed on the flange 17, and the movable end of the second cylinder 15 is fixedly connected to the sleeve 14. When the second cylinder 15 is working, the sleeve 14 can be pushed to move on the connecting rod 1. A second connecting rod 16 is hinged on the sleeve 14, and one end of the second connecting rod 16 away from the sleeve 14 is hinged on the clamping arm 3. Therefore, when the second cylinder 15 is working, it can push the sleeve 14 to move, and then drive the three clamping arms 3 to slide on the three guide rails 2 respectively through the second connecting rod 16.

[0038] like Figure 5 As shown, when the three clamping arms 3 move toward the connecting rod 1 at the same time, the three clamping arms 3 can press against the tooth surface of the spur gear, thereby clamping the spur gear by friction.

[0039] The tooth surface of the bevel gear is inclined, so the contact area between the clamp arm 3 and the tooth surface of the bevel gear is reduced, and it is impossible to clamp stably. Therefore, the present invention is provided with a lifting seat 8 on the clamp arm 3, and the first cylinder 13 is fixedly installed on the clamp arm 3. The movable end of the first cylinder 13 is fixedly connected to the lifting seat 8. When the first cylinder 13 is working, it can drive the lifting seat 8 to move on the clamp arm 3. A third cylinder 20 is fixed at the bottom of the connecting rod 1, and a pressure plate 7 is fixed at the movable end of the third cylinder 20. When the third cylinder 20 is working, the pressure plate 7 can be raised and lowered.

[0040] A positioning rod 4 is fixed to the bottom of the lifting seat 8, and the positioning rod 4 is parallel to the clamping arm 3. The positioning rod 4 is located on the side of the clamping arm 3 close to the pressure plate 7. A movable plate 6 is hinged at the bottom of the positioning rod 4. Figure 3 and Figure 4 As shown, a first limiting portion 18 is fixed to the bottom of the positioning rod 4, and a second limiting portion 19 cooperating with the first limiting portion 18 is fixed to one end of the movable plate 6 close to the positioning rod 4. An elastic member for making the second limiting portion 19 abut against the first limiting portion 18 is provided between the positioning rod 4 and the movable plate 6. The elastic member may be a torsion spring, which is sleeved on the hinge shaft between the positioning rod 4 and the movable plate 6, and the two ends of the torsion spring are respectively connected to the positioning rod 4 and the movable plate 6. In the initial state, the torsion spring pushes the second limiting portion 19 against the first limiting portion 18, and the movable plate 6 is perpendicular to the positioning rod 4.

[0041] A supporting arm 5 is slidably mounted on the bottom of the clamping arm 3 , and the supporting arm 5 is perpendicular to the clamping arm 3 .

[0042] When the present invention is used to clamp bevel gears, Figure 6As shown, under the action of the second cylinder 15, the clamping arms 3 move on the guide rail 2, and the three clamping arms 3 all abut against the edge of the bevel gear. At this time, the first cylinder 13 is activated, and the first cylinder 13 moves the positioning rod 4 downward until the movable plate 6 abuts against the bevel gear. Due to the inclined tooth surface of the bevel gear, the downward movement of the positioning rod 4 will cause the movable plate 6 to rotate, and when the movable plate 6 rotates, the supporting arm 5 will move on the clamping arm 3 through the linkage structure, so that the supporting arm 5 extends into the lower side of the bevel gear and supports the bevel gear from below.

[0043] When the third cylinder 20 is started, the pressure plate 7 descends and rests against the top center of the bevel gear, thereby cooperating with the support arm 5 to firmly clamp the bevel gear.

[0044] like Figure 7 As shown in the figure, when the bevel gear is not placed correctly and tilts, the three positioning rods 4 move downward, and the bevel gear can also be pressed flat again so that the bevel gear is in the Figure 6 Status shown.

[0045] Embodiment 2:

[0046] On the basis of the first embodiment, the linkage structure designed by the present invention includes a driving block 9, a sliding seat 22 and a transmission rod 12, wherein the driving block 9 is slidably mounted on the lifting seat 8, and the sliding direction of the driving block 9 on the lifting seat 8 is parallel to the positioning rod 4. A first connecting rod 21 is hinged on one side of the driving block 9, and one end of the first connecting rod 21 away from the driving block 9 is hinged on the movable plate 6, so when the movable plate 6 rotates, the movable plate 6 drives the driving block 9 to slide on the lifting seat 8 through the first connecting rod 21.

[0047] The slide 22 is also slidably mounted on the lifting seat 8, but the sliding direction of the slide 22 on the lifting seat 8 is perpendicular to the positioning rod 4. A driving groove 11 is provided on the slide 22, and a driving portion 10 is provided on the top of the driving block 9. Figure 3 As shown, the driving part 10 is inclined, and the driving groove 11 is provided with an inclined part that slides with the driving part 10. When the driving block 9 moves on the lifting seat 8, the driving part 10 will cooperate with the inclined part to move the slide 22 on the lifting seat 8.

[0048] The transmission rod 12 is slidably matched with the slide seat 22, and the sliding direction of the transmission rod 12 on the slide seat 22 is parallel to the positioning rod 4. The bottom of the transmission rod 12 is fixedly connected to the support arm 5. When the slide seat 22 moves on the lifting seat 8, the slide seat 22 can drive the transmission rod 12 to move together, and then drive the support arm 5 to move at the bottom of the clamping arm 3, thereby realizing the linkage effect between the movable plate 6 and the support arm 5.

[0049] like Figure 5As shown, when the present invention is used to clamp a spur gear, the positioning rod 4 abuts against the end face of the spur gear, the movable plate 6 does not rotate, and therefore the support arm 5 does not extend, and the spur gear can be clamped only by the three clamp arms 3. Figure 6 As shown, when the present invention is used to clamp the bevel gear, the positioning rod 4 is against the tooth surface of the bevel gear, and the movable plate 6 rotates so that the support arm 5 extends into the lower side of the bevel gear. The support arm 5 supports the bevel gear from the bottom, and the upper middle part of the bevel gear is pressed by the pressure plate 7, so as to achieve stable clamping of the bevel gear.

[0050] Embodiment three:

[0051] On the basis of the first and second embodiments, in order to increase the friction force during clamping and reduce the damage to the tooth surface, the present invention fixes a rubber pad on the side of the clamp arm 3 close to the pressure plate 7 and the lower surface of the movable plate 6. When the clamp arm 3 clamps the gear, the rubber pad is compressed and deformed, thereby increasing the contact surface with the gear and clamping more firmly.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A clamping claw for clamping a gear, characterized in that: include: A connecting rod (1), the connecting rod (1) being used to connect an industrial robot; At least three guide rails (2), all of the guide rails (2) being evenly fixed at the lower end of the connecting rod (1) in the circumferential direction; At least three clamping assemblies, each of the clamping assemblies corresponding to the guide rail (2) one by one, the clamping assemblies comprising a clamping arm (3) and a positioning rod (4), the clamping arm (3) being slidably mounted on the guide rail (2), the positioning rod (4) being capable of moving along the clamping arm (3), a supporting arm (5) being slidably mounted at the bottom of the clamping arm (3), a movable plate (6) being hinged at the bottom of the positioning rod (4), and a linkage structure being arranged between the movable plate (6) and the supporting arm (5); A pressure plate (7), wherein the pressure plate (7) is arranged to be lifted and lowered at the bottom of the connecting rod (1); The movable plate (6) is perpendicular to the clamping arm (3) in an initial state; the movable plate (6) moves with the positioning rod (4); when the movable plate (6) rotates, the movable plate (6) causes the support arm (5) to move on the clamping arm (3) through a linkage structure; The linkage structure includes: A lifting seat (8), the lifting seat (8) being fixed on the top of the positioning rod (4), and the lifting seat (8) being slidably mounted on the clamping arm (3); A driving block (9), the driving block (9) being slidably mounted on the lifting seat (8), a driving portion (10) being arranged on the top of the driving block (9), a first connecting rod (21) being hingedly connected to the driving block (9), and an end of the first connecting rod (21) away from the driving block (9) being hingedly connected to the movable plate (6); A slide seat (22), the slide seat (22) being slidably mounted on the lifting seat (8), and the slide seat (22) being provided with a driving groove (11) cooperating with the driving part (10); A transmission rod (12), the transmission rod (12) being slidably mounted on a slide seat (22), and the bottom of the transmission rod (12) being fixedly connected to the support arm (5); When the movable plate (6) rotates around the hinge axis between the positioning rod (4) and the movable plate (6), the first connecting rod (21) drives the sliding seat (22) to move via the driving block (9), so that the supporting arm (5) moves perpendicular to the clamping arm (3); A first cylinder (13) is fixed on the clamping arm (3), and a movable end of the first cylinder (13) is fixedly connected to the lifting seat (8); A sliding sleeve (14) is sleeved on the connecting rod (1), a second cylinder (15) is arranged on the connecting rod (1), a movable end of the second cylinder (15) is fixedly connected to the sliding sleeve (14), a second connecting rod (16) is hinged on the clamping arm (3), and the second connecting rod (16) is hinged to the sliding sleeve (14).

2. A clamping jaw for clamping a gear according to claim 1, characterized in that: A flange (17) is fixed to one end of the connecting rod (1) away from the guide rail (2), and the second cylinder (15) is fixed to the flange (17).

3. A clamping jaw for clamping a gear according to claim 1, characterized in that: The positioning rod (4) is located on a side of the clamping arm (3) close to the pressure plate (7).

4. A clamping jaw for clamping a gear according to claim 1, characterized in that: A first limiting portion (18) is fixed to the bottom of the positioning rod (4), a second limiting portion (19) is fixed to the movable plate (6), and an elastic member for making the second limiting portion (19) abut against the first limiting portion (18) is provided between the positioning rod (4) and the movable plate (6); when the second limiting portion (19) abuts against the first limiting portion (18), the movable plate (6) is perpendicular to the positioning rod (4).

5. A clamping jaw for clamping a gear according to claim 1, characterized in that: A third cylinder (20) is fixed to the bottom of the connecting rod (1), and the pressure plate (7) is fixed to the movable end of the third cylinder (20).

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