Clamp for locking cylindrical object

Abstract

The utility model discloses a clamp for locking a cylindrical object. The clamp comprises a fixing frame, a clamping device and a locking device, one end of each main clamping finger is hinged to the fixing frame; the two double-thread screws are connected with the two main clamping fingers respectively, anti-falling nuts are fixed to the two ends of each double-thread screw, the positions, located between the two anti-falling nuts, of each double-thread screw are sleeved with two auxiliary clamping fingers at intervals, the two auxiliary clamping fingers are located on the two sides of the main clamping fingers respectively, and a cylindrical object is clamped among the four auxiliary clamping fingers; the locking screw rod is arranged on the fixing frame in a penetrating mode, one end of the locking screw rod is in threaded connection with a screwing cap, the other end of the locking screw rod is fixedly provided with a locking conical block, the locking conical block is located between the two main clamping fingers, and one ends of the two main clamping fingers make contact with the conical face of the outer wall of the locking conical block. According to the clamp, mechanical locking clamping is adopted, motor driving clamping is not needed, and the problem that a gripper cannot be used due to the fact that a motor breaks down is solved; according to the clamp, the four auxiliary clamping fingers are adopted, and compared with two grippers, the clamping stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping fixtures, and more particularly to a clamp for locking cylindrical objects. Background Art

[0002] Currently, when disassembling a DN200 valve, it is generally necessary to use a hydraulic wrench to loosen the nut on the valve, use an electromagnetic induction heating head to heat rusted nuts that are difficult to remove, and use the principle of thermal expansion and contraction to destroy the rust layer structure, making it easier to disassemble with an electric wrench. A nut splitter is used to disassemble and cut nuts that cannot be removed with an electric wrench after heating. These operations are all manual, time-consuming, and labor-intensive, with high labor costs. However, if a robotic arm with disassembly tools is used, the valve can be automatically disassembled, which can reduce labor costs and save time and effort. Therefore, considering how to clamp tools such as hydraulic wrenches, electromagnetic induction heating heads, and nut splitters to the robotic arm is a technical problem that needs to be solved. In order to achieve the clamping of these tools, and given that these tools generally have cylindrical characteristic structures, a robotic gripper that can clamp cylindrical objects can be considered to clamp these tools.

[0003] So far, it has been found through searching that in the existing technology for clamping cylindrical objects, there is a patent publication number CN206123662U, which is titled as a mechanical gripper for clamping cylindrical objects, comprising a motor and a lead screw, wherein the motor drives the lead screw to rotate, and the lead screw is divided into a first lead screw and a second lead screw, and the threading directions of the first lead screw and the second lead screw are opposite; the first lead screw is connected to a first light rod, the second lead screw is connected to a second light rod, the first light rod is connected to a first hand grip, and the second light rod is connected to a second hand grip. The mechanical gripper uses two lead screws as the power source of the gripper, and can form a self-locking after clamping the cylindrical object, making the clamped parts more secure. However, the mechanical gripper uses two hand grips to clamp the cylindrical object, and the clamping stability is poor; moreover, it is driven by a motor, and when the motor fails and cannot be used, the two grippers cannot be opened or clamped normally, affecting the normal use of the gripper.

[0004] Therefore, how to provide a clamp for locking cylindrical objects that can be opened and closed manually and has stable clamping is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In view of this, the utility model provides a clamp for locking cylindrical objects which can be opened and closed manually and has stable clamping.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A clamp for locking a cylindrical object, comprising:

[0008] a fixed frame, which is detachably connected to the end of the manipulator;

[0009] Main clamping fingers, wherein the main clamping fingers are arranged in two intervals, and positions near one end of the two main clamping fingers are respectively hingedly connected to the fixing frame;

[0010] A double-headed screw rod, wherein the double-headed screw rods are arranged at intervals and are respectively connected to the two main clamping fingers. An anti-slip nut is fixed at both ends of each double-headed screw rod. Two auxiliary clamping fingers are sleeved at intervals between the two anti-slip nut rods on each double-headed screw rod, and the two auxiliary clamping fingers are respectively located on both sides of the main clamping fingers. The cylindrical object is clamped between the four auxiliary clamping fingers.

[0011] A locking screw is arranged through a through hole on the fixing frame, one end of the locking screw is threadedly connected to a screw cap, and the other end is fixed with a locking conical block, the locking conical block is located between the two main clamping fingers, and one end of the two main clamping fingers is in contact with the outer wall conical surface of the locking conical block.

[0012] The cam is then rotated to release the locking screw from the locking mechanism, and the locking screw is then released so that the locking mechanism can be released and the cam is released, thereby releasing the locking screw from the locking mechanism.

[0013] Therefore, the clamp adopts mechanical locking clamping and does not require motor-driven clamping, avoiding the problem that the two grippers cannot open or clamp normally when the motor fails to work, affecting the normal use of the grippers; and the clamp adopts four auxiliary clamping fingers, which improves the stability of clamping cylindrical objects compared with two grippers.

[0014] Furthermore, the fixing frame includes:

[0015] A clamping flange, one side of which is detachably connected to the end of the manipulator;

[0016] A connecting plate, one side of which is fixedly connected to the other side of the clamping flange, a hollow operating hole being formed on the connecting plate, one end of the locking screw being arranged through the through hole on the other side of the connecting plate and extending into the hollow operating hole;

[0017] The connecting ear plate assembly is two spaced apart, one end of each is fixedly connected to the other side of the connecting plate, and the other end is hingedly connected to the two main clamping fingers near one end thereof.

[0018] The beneficial effects of adopting the above technical solution are: the setting of the hollow operating hole not only reduces the weight of the fixed frame, thereby reducing the load of the robot, but also provides a sufficiently large operating space for the wrench to rotate the screw cap, thereby realizing the translation of the locking screw, and then driving the locking conical block to translate to realize the clamping and loosening operations of the four auxiliary clamping fingers on the cylindrical object.

[0019] Furthermore, each of the connecting ear plate assemblies includes:

[0020] Ear plates, there are two ear plates, one end of which is fixed at intervals on the other side of the connecting plate;

[0021] A bolt is passed through the two ear plates and fixed by a locking nut. The main clamping finger is located near one end thereof and is located between the two ear plates and is sleeved on the bolt.

[0022] The beneficial effect of adopting the above technical solution is that the main clamping fingers and the ear plates can be quickly disassembled and assembled.

[0023] Furthermore, the auxiliary clamping fingers are adaptive wedge-shaped clamping fingers, and their clamping surfaces are two oppositely arranged wedge-shaped surfaces.

[0024] The beneficial effect of adopting the above technical solution is that when the two wedge-shaped surfaces clamp a cylindrical object, the cylindrical object can be self-centered and positioned, thereby achieving precise clamping of the cylindrical object.

[0025] Furthermore, a limit ring is fixed on the outer wall of the locking screw at the position of the small end of the locking conical block, and one end stop of the two main clamping fingers abuts against the limit ring.

[0026] The beneficial effect of adopting the above technical solution is that when the locking screw is pushed to the left, one end of the two main clamping fingers will not cross the limit ring, thus preventing the locking screw from moving too much to the left, which would result in a longer time and a larger number of turns of the screw cap to achieve clamping, resulting in reduced clamping efficiency and time-consuming operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0028] Figure 1 This is a schematic structural diagram of a clamp for locking a cylindrical object provided by the utility model from a first perspective.

[0029] Figure 2 This is a structural schematic diagram of a second perspective of a clamp for locking a cylindrical object provided by the utility model.

[0030] Figure 3 This is a schematic structural diagram of a clamp for locking cylindrical objects provided by the utility model from a third perspective.

[0031] Figure 4 This is a schematic diagram of a cylindrical object locking clamp provided by the present invention when clamping the cylindrical object. DETAILED DESCRIPTION

[0032] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1-4 The present invention discloses a clamp for locking a cylindrical object, comprising:

[0034] A fixed frame 1, which is detachably connected to the end of the manipulator;

[0035] The main clamping fingers 2 are arranged in two intervals, and the positions near one end of the two main clamping fingers 2 are respectively hingedly connected to the fixing frame 1;

[0036] Two stud screws 3 are arranged at intervals and are respectively passed through the two main clamping fingers 2. Anti-slip nuts 4 are fixed at both ends of each stud screw 3. Two auxiliary clamping fingers 5 are spaced apart and sleeved between the two anti-slip nuts 4 on each stud screw 3. The two auxiliary clamping fingers 5 are respectively located on both sides of the main clamping fingers 2. The cylindrical object 100 is clamped between the four auxiliary clamping fingers 5.

[0037] The locking screw 6 is arranged through the through hole on the fixing frame 1. One end of the locking screw 6 is threadedly connected to a screw cap 7, and the other end is threaded or welded with a locking conical block 8. The locking conical block 8 is located between the two main clamping fingers 2, and one end of the two main clamping fingers 2 is in contact with the outer wall conical surface 81 of the locking conical block 8.

[0038] In the above embodiment, the fixing frame 1 includes:

[0039] The clamping flange 11 is connected to the end of the manipulator by a fast disassembly screw.

[0040] A connecting plate 12 is welded or screwed to the other side of the clamping flange 11 on one side of the connecting plate 12. A hollow operating hole 121 is formed on the connecting plate 12. One end of the locking screw 6 is arranged through the through hole on the other side of the connecting plate 12 and extends into the hollow operating hole 121.

[0041] The connecting ear plate assemblies 13 are two spaced apart, one end of each is welded or screwed to the other side of the connecting plate 12, and the other end is hingedly connected to the two main clamping fingers 2 near one end thereof.

[0042] Each connecting ear plate assembly 13 includes:

[0043] There are two ear plates 131, one end of which is fixed to the other side of the connecting plate 12 by screws or welding;

[0044] The bolt 132 is passed through the two ear plates 131 and fixed by a locking nut 133 . The main clamping finger 2 is located between the two ear plates 131 and is sleeved on the bolt 132 .

[0045] In the above embodiment, the auxiliary clamping finger 5 may be an adaptive wedge-shaped clamping finger, the clamping surface of which is a concave structure, and the two opposite side surfaces of the concave structure are wedge-shaped surfaces 51 .

[0046] In some embodiments, a limit ring 61 is welded or integrally formed on the outer wall of the locking screw 6 at the small end of the locking cone block 8 , and one end of the two main clamping fingers 2 is stopped against the limit ring 61 .

[0047] The clamp of the utility model can be assembled on a manipulator to clamp tools such as hydraulic wrenches, electromagnetic induction heating heads, nut splitters, etc. with cylindrical structures. The manipulator equipped with these tools can be used to disassemble larger valves of DN200 without manual disassembly, thereby improving disassembly efficiency.

[0048] The specific principle of clamping the cylindrical object 100 is:

[0049] When the cylindrical object 100 needs to be removed, the screw cap 7 is rotated in the opposite direction so that the screw cap 7 is no longer in contact with the longitudinal beam on the fixing frame, and then the locking screw 6 is pushed to the left, so that the locking cone block 8 moves toward the auxiliary clamping finger 5, one end of the two main clamping fingers 2 moves toward the small end of the outer wall tapered surface 81 and retracts, thereby making the other end of the two main clamping fingers 2 relaxed. At this time, the auxiliary clamping finger 5 no longer clamps the cylindrical object 100, and the cylindrical object 100 can be removed.

[0050] When this clamp is clamping a cylindrical object, the wedge-shaped clamping fingers and the cylindrical object can be adaptively matched. By manually rotating the screw cap, the locking screw is driven to move back and forth, and then the locking cone block is driven to move back and forth, thereby driving the two main clamping fingers to drive the four auxiliary clamps to clamp or release the cylindrical object. This operation does not require a motor-driven clamp, thus avoiding the problem that when the motor fails and cannot be used, the two grippers cannot be opened or clamped normally, affecting the normal use of the gripper; and the clamp uses four auxiliary gripping fingers, which improves the stability of the cylindrical object clamping compared to two gripping fingers, and realizes the clamping of cylindrical objects within a certain diameter range, and is convenient and fast.

[0051] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0052] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamp for locking cylindrical objects, characterized in that: include: A fixed frame (1) detachably connected to the end of the manipulator; Main clamping fingers (2), wherein the main clamping fingers (2) are arranged in two intervals, and positions near one end of the two main clamping fingers (2) are respectively hingedly connected to the fixing frame (1); A double-headed screw rod (3), wherein the double-headed screw rod (3) is arranged in two intervals and is respectively connected to the two main clamping fingers (2); an anti-slip nut (4) is fixed at both ends of each double-headed screw rod (3); two auxiliary clamping fingers (5) are sleeved at intervals on each double-headed screw rod (3) between the two anti-slip nuts (4); and the two auxiliary clamping fingers (5) are respectively located on both sides of the main clamping fingers (2); and a cylindrical object (100) is clamped between the four auxiliary clamping fingers (5); A locking screw (6) is arranged through a through hole on the fixing frame (1), one end of the locking screw (6) is threadedly connected to a screw cap (7), and the other end is fixed with a locking conical block (8), the locking conical block (8) is located between the two main clamping fingers (2), and one end of the two main clamping fingers (2) is in contact with the outer wall conical surface (81) of the locking conical block (8).

2. A cylindrical object locking clamp according to claim 1, characterized in that: The fixing frame (1) comprises: A clamping flange (11), one side of which is detachably connected to the end of the manipulator; A connecting plate (12), one side of the connecting plate (12) is fixedly connected to the other side of the clamping flange (11), a hollow operating hole (121) is provided on the connecting plate (12), one end of the locking screw (6) is arranged through the through hole on the other side of the connecting plate (12) and extends into the hollow operating hole (121); A connecting ear plate assembly (13) is provided. The connecting ear plate assembly (13) is divided into two at intervals, one end of each of which is fixedly connected to the other side of the connecting plate (12), and the other end of each of which is hingedly connected to a position close to one end of each of the two main clamping fingers (2).

3. A cylindrical object locking clamp according to claim 2, characterized in that: Each of the connecting ear plate components (13) comprises: Ear plates (131), there are two ear plates (131), one end of which is fixed at intervals on the other side surface of the connecting plate (12); A bolt (132) is passed through the two ear plates (131) and fixed by a locking nut (133); a position close to one end of the main clamping finger (2) is located between the two ear plates (131) and is sleeved on the bolt (132).

4. A cylindrical object locking clamp according to any one of claims 1 to 3, characterized in that: The auxiliary clamping finger (5) is an adaptive wedge-shaped clamping finger, and its clamping surface is two wedge-shaped surfaces (51) arranged oppositely.

5. A cylindrical object locking clamp according to any one of claims 1 to 3, characterized in that: A limit ring (61) is fixed on the outer wall of the locking screw (6) at the position of the small end of the locking conical block (8), and one end stop of the two main clamping fingers (2) abuts against the limit ring (61).

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