Three-finger mechanical clamping jaw

Abstract

The utility model relates to the technical field of tool clamp equipment, in particular to a three-finger mechanical clamping jaw. The technical problem that in the prior art, the clamping stability of a spherical workpiece is poor is solved. The driving part is detachably connected to the connecting part; the action assembly is provided with three groups of action parts which are rotationally and symmetrically arranged by taking the driving part as the center; each group of action parts is connected with one group of clamping jaw structures; each clamping jaw structure is provided with an arc-shaped surface, so that after the action assembly acts, the three clamping jaw structures can clamp a spherical body; the clamping jaw structure is further provided with a ridge-shaped structure made of nitrile rubber buna. According to the technical scheme, the mode that the spherical body 1 can be stably clamped is provided in a three-finger clamping mode, the friction force after clamping is large, the clamping strength is stable, and after actual clamping, the clamped spherical body makes close contact with the clamping jaw structure, and the gap is small.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixture equipment, and particularly relates to a three-finger mechanical jaw. Background Art

[0002] In the current method, the shapes of workpieces involved in tooling part equipment and installation are diverse. There are many fixtures for parallel clamping in the prior art, usually two groups of jaws; for clamping spherical or ellipsoidal workpieces, three-jaw or multi-jaw fixtures are required. However, after clamping by the fixtures in the prior art, the clamped spherical parts are prone to eccentricity. The main reasons for this problem include unreasonable jaw design, resulting in large gaps after clamping, or because both the jaws and the clamped components are rigid, and the clamped components are prone to displacement after clamping. That is, there is still room for improvement in the clamping stability of spherical workpieces. Summary of the Utility Model

[0003] The utility model aims to solve the technical problem of poor clamping stability of spherical workpieces in the prior art, and provides a three-finger mechanical jaw.

[0004] To solve the above technical problem, the technical solution of the utility model is specifically as follows:

[0005] A three-finger mechanical jaw, comprising:

[0006] A connecting component 10;

[0007] A driving component 20, which is detachably connected to the connecting component 10;

[0008] An action assembly 30, which has three action parts 300 arranged in a 120-degree rotational symmetry centered on the driving component 20;

[0009] A jaw structure 40, and each action part 300 is connected with a group of the jaw structures 40;

[0010] The jaw structure 40 constructs an arc surface 401, so that after the action assembly 30 acts, the three groups of jaw structures 40 can clamp a spherical body 1;

[0011] The jaw structure 40 also constructs a ribbed structure 402 formed by nitrile rubber.

[0012] Specifically, the connecting component 10 is a connecting disk 101;

[0013] Connecting holes 110 are formed on the connecting disk 101;

[0014] One side of the connecting disk 101 is fixedly connected with a connecting handle 111, and the connecting handle 111 is used to connect a moving arm.

[0015] Specifically, the driving component 20 is a driving cylinder;

[0016] The driving cylinder has a cylinder body 20a, and a connecting member 210 is arranged circumferentially on the cylinder body 20a;

[0017] A positioning hole 211 that mates with the connection hole 110 is provided on the connecting member 210;

[0018] A fastener 212 that can pass through the positioning hole 211 and be screwed into the connection hole 110.

[0019] Specifically, one side of the output end of the cylinder body 20a is connected to a fixing plate 310;

[0020] A central hole 310a is provided on the fixing plate 310;

[0021] The output end 20b of the driving cylinder can pass through the central hole 310a and be connected to an action disc 320.

[0022] Specifically, the action part 300 includes:

[0023] An L-shaped arm 300a, one end of which is fixedly connected to the fixing plate 310, and the other end of which is rotatably connected to an action member 330, forming a first rotation point a1;

[0024] The L-shaped arm 300a includes three groups and is arranged at 120 degrees around the center of the fixing plate 310.

[0025] Specifically, it further includes:

[0026] A rotating short arm 300b, arranged corresponding to the L-shaped arm 300a one by one;

[0027] One end of the rotating short arm 300b is rotatably connected to the action member 330 and forms a second rotation point a2;

[0028] The first rotation point a1 and the second rotation point a2 are located on the same straight line;

[0029] The other end of the rotating short arm 300b is rotatably connected to the action disc 320.

[0030] Specifically, one end of the action member 330 away from the driving cylinder forms a trapezoidal limiting groove 400;

[0031] The number of the limiting grooves 400 is 2;

[0032] The notch 400a of the limiting groove 400 corresponds to the short side of the trapezoid.

[0033] Specifically, the jaw structure 40 includes:

[0034] The first arc-shaped bending portion 401a and the second arc-shaped bending portion 401b;

[0035] The second ends of the first arc-shaped bending portion 401a and the second arc-shaped bending portion 401b intersect;

[0036] The first ends of the first arc-shaped bending portion 401a and the second arc-shaped bending portion 401b are respectively configured with a mating portion 403;

[0037] The mating portion 403 is used to be snapped into the notch 400a;

[0038] The ribbed structure 402 is a plurality of connecting short columns 402a, and both ends of the plurality of connecting short columns 402a are respectively connected to the first arc-shaped bending portion 401a and the second arc-shaped bending portion 401b.

[0039] The utility model has the following beneficial effects:

[0040] To sum up, this technical solution provides a way to stably clamp the spherical body 1 by means of three-finger clamping, and after clamping, the friction force is large, the clamping strength is stable. After actual clamping, the clamped spherical body is in close contact with the jaw structure and the gap is small. Brief Description of the Drawings

[0041] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0042] Figure 1 It is a structural schematic diagram of the present utility model;

[0043] Figure 2 It is a three-dimensional schematic diagram of the motion assembly of the present utility model;

[0044] Figure 3 It is a schematic diagram of the fixing plate and the L-shaped arm of the present utility model;

[0045] Figure 4 It is an embodiment of the limiting groove and the mating portion of the present utility model;

[0046] Figure 5 It is another embodiment of the limiting groove and the mating portion of the present utility model.

[0047] The reference numerals in the drawings are represented as:

[0048] Connecting member 10, driving member 20, motion assembly 30, jaw structure 40, motion portion 300, spherical body 1, arc surface 401, ribbed structure 402;

[0049] Connecting disk 101, connecting hole 110, connecting handle 111;

[0050] Drive component 20, cylinder body 20a, alignment hole 211, fastener 212;

[0051] Fixed plate 310, central hole 310a, action disk 320;

[0052] L-shaped arm 300a, rotating short arm 300b, first rotation point a1, second rotation point a2;

[0053] Limit groove 400, notch 400a;

[0054] First arc-shaped bending part 401a, second arc-shaped bending part 401b, mating part 403, connecting short post 402a. Specific implementation mode

[0055] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. It should be noted that for the convenience of description in this application, the "left side" in the current view is the "first end", the "right side" is the "second end", the "upper side" is the "first end", and the "lower side" is the "second end". The purpose of such description is to clearly express the technical solution and should not be construed as an improper limitation of the technical solution of this application.

[0056] The present utility model aims to solve the technical problem of poor clamping stability of spherical workpieces in the prior art, and provides a three-finger mechanical claw. The main way to solve this problem is as follows. Please refer to the attached Figure 1 As shown, this technical solution adopts a three-finger mechanical claw, which specifically includes a connecting component 10; a drive component 20 is detachably connected to the connecting component 10; an action assembly 30, which has three groups of action parts 300 arranged in a 120-degree rotational symmetry around the center of the drive component 20; a claw structure 40, and each group of action parts 300 is connected with a group of claw structures 40, thus forming a three-finger clamping method. Further, in order to ensure the clamping stability and reduce the gap after clamping, the claw structure 40 is constructed with an arc-shaped surface 401, so that after the action assembly 30 acts, the three groups of claw structures 40 can clamp the spherical body 1; the claw structure 40 is also constructed with a ribbed structure 402 formed by nitrile rubber. The nitrile rubber makes the rigid contact become an effect with increased friction after clamping. In addition, the ribbed structure 402 is designed as the support of the claw structure 40, which can effectively ensure the clamping strength and the stability after clamping.

[0057] In summary, the present technical solution provides a method of stably clamping the spherical body 1 by means of three-finger clamping. After clamping, the friction force is large and the clamping strength is stable. After actual clamping, the clamped spherical body 1 is in close contact with the jaw structure 40 and the gap is small.

[0058] In a specific embodiment, please refer to Figure 1 As shown, the connecting member 10 is a connecting disk 101; a connecting hole 110 is formed on the connecting disk 101; a connecting handle 111 is fixedly connected to one side of the connecting disk 101, and the connecting handle 111 is used to connect the moving arm, so as to adapt to existing clamping and handling machinery and equipment.

[0059] In a specific embodiment, please refer to Figure 1 As shown, the driving member 20 is a driving cylinder; the driving cylinder has a cylinder body 20a, and a connecting member 210 is circumferentially arranged on the cylinder body 20a; a positioning hole 211 that cooperates with the connecting hole 110 is arranged on the connecting member 210; a fastening member 212, which can pass through the positioning hole 211 and be screwed into the connecting hole 110 as a fixed installation method.

[0060] In a specific embodiment, please refer to Figure 1 As shown, one side of the output end of the cylinder body 20a is connected to a fixing plate 310; a central hole 310a is arranged on the fixing plate 310; the output end 20b of the driving cylinder can pass through the central hole 310a and be connected to an action disk 320.

[0061] In a specific embodiment, please refer to Figure 1 As shown, the action part 300 includes: an L-shaped arm 300a, one end of which is fixedly connected to the fixing plate 310, and the other end of which is rotatably connected to an action member 330 to form a first rotation point a1; the L-shaped arm 300a includes three groups and is arranged at 120 degrees with respect to the center of the fixing plate 310.

[0062] It further includes: a rotating short arm 300b, which is arranged corresponding to the L-shaped arm 300a; one end of the rotating short arm 300b is rotatably connected to the action member 330 and forms a second rotation point a2; the first rotation point a1 and the second rotation point a2 are located on the same straight line; the other end of the rotating short arm 300b is rotatably connected to the action disk 320.

[0063] As shown in the attached Figure 1 、 2 As shown, when the driving cylinder is in a contracted state, corresponding to the clamping state, when the output end of the driving cylinder extends, the action disk 320 moves downward, causing the rotating short arm 300b to act, and further pulling the action member 330 to rotate around the first rotation point a1 to realize clamping release.

[0064] In a specific embodiment, please refer to Figure 1 、4 As shown in Fig. 5, a limiting groove 400 in the shape of a trapezoid is formed at one end of the moving part 330 away from the driving cylinder; the number of the limiting grooves 400 is two; the notch 400a of the limiting groove 400 corresponds to the short side of the trapezoid.

[0065] The jaw structure 40 includes: a first arc-shaped bending part 401a and a second arc-shaped bending part 401b; the second ends of the first arc-shaped bending part 401a and the second arc-shaped bending part 401b intersect; a fitting part 403 is respectively constructed at the first ends of the first arc-shaped bending part 401a and the second arc-shaped bending part 401b; the fitting part 403 is used to be clamped into the notch 400a; the ribbed structure 402 is a plurality of connecting short columns 402a, and both ends of the plurality of connecting short columns 402a are respectively connected to the first arc-shaped bending part 401a and the second arc-shaped bending part 401b.

[0066] As shown in the appendix Figure 4 、 5 As shown, the fitting part 403 of the jaw structure 40 enters the limiting groove 400 from the side for expansion connection to achieve detachable assembly.

[0067] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A three-finger mechanical gripper, characterized in that Comprising: A connecting component (10); A driving component (20), detachably connected to the connecting component (10); An action assembly (30), having three sets of action parts (300) arranged in a 120-degree rotational symmetry centered on the driving component (20); A jaw structure (40), with a set of the jaw structures (40) connected to each set of the action parts (300); The jaw structure (40) constructs an arc-shaped surface (401) such that after the action assembly (30) acts, the three sets of the jaw structures (40) can grip a spherical body (1); The jaw structure (40) also constructs a ribbed structure (402) formed by nitrile rubber.

2. The three-finger mechanical gripper according to claim 1, characterized in that, The connecting component (10) is a connecting disk (101); A connecting hole (110) is formed on the connecting disk (101); One side of the connecting disk (101) is fixedly connected with a connecting handle (111), and the connecting handle (111) is used to connect a moving arm.

3. The three-finger mechanical gripper according to claim 2, characterized in that The driving component (20) is a driving cylinder; The driving cylinder has a cylinder body (20a), and a connecting piece (210) is circumferentially arranged on the cylinder body (20a); A positioning hole (211) matching the connecting hole (110) is arranged on the connecting piece (210); A fastener (212) that can pass through the positioning hole (211) and be screwed into the connecting hole (110).

4. The three-finger mechanical gripper according to claim 3, characterized in that, One side of the output end of the cylinder body (20a) is connected with a fixing plate (310); A central hole (310a) is arranged on the fixing plate (310); The output end (20b) of the driving cylinder can pass through the central hole (310a) and be connected with an action disk (320).

5. The three-finger mechanical gripper according to claim 4, characterized in that The action part (300) includes: An L-shaped arm (300a), one end of which is fixedly connected to the fixing plate (310), and the other end is rotatably connected to an action piece (330), Forming a first rotation point (a1); The L-shaped arms (300a) include three sets and are arranged at 120 degrees centered on the center of the fixing plate (310).

6. The three-finger mechanical gripper according to claim 5, wherein Also included are: Rotating short arms (300b), arranged corresponding to the L-shaped arms (300a); One end of the rotating short arm (300b) is rotatably connected to the action piece (330) and forms a second rotation point (a2); The first rotation point (a1) and the second rotation point (a2) are located on the same straight line; The other end of the rotating short arm (300b) is rotatably connected to the action disk (320).

7. The three-finger mechanical gripper according to claim 5, characterized in that, One end of the action piece (330) away from the driving cylinder forms a trapezoidal limiting groove (400); The number of the limiting grooves (400) is 2; The notch (400a) of the limiting groove (400) corresponds to the short side of the trapezoid.

8. The three-finger mechanical gripper according to claim 7, wherein The jaw structure (40) includes: A first arc-shaped bending part (401a) and a second arc-shaped bending part (401b); The second ends of the first arc-shaped bending part (401a) and the second arc-shaped bending part (401b) intersect; A mating portion (403) is respectively constructed at the first ends of the first arcuate bending portion (401a) and the second arcuate bending portion (401b); The mating portion (403) is adapted to be snapped into the notch (400a); The ribbed structure (402) is a plurality of connecting studs (402a), and both ends of the plurality of connecting studs (402a) are respectively connected to the first arcuate bending portion (401a) and the second arcuate bending portion (401b).

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