Shear pin type torque limiter for overload protection of exoskeleton joints

Abstract

The utility model relates to a shear pin type torque limiter for exoskeleton joint overload protection, which belongs to the technical field of shear pin type torque limiters and comprises an input flange and an output flange, the input flange is provided with a first through hole, the output flange is provided with a second through hole, and the first through hole is communicated with the second through hole. And the output flange is in threaded connection with a threaded sleeve through a through second through hole, the inner wall of the threaded sleeve is fixedly connected with a spring, and one end of the spring is fixedly connected with a limiting frame. When the shear pin type torque limiter is used, if the shear pin body is broken, a round rod is broken due to breakage of the shear pin body, after the round rod is broken, a spring pulls a limiting frame into a threaded sleeve, and after the limiting frame moves into the threaded sleeve, the limiting frame does not limit the shear pin body any more; and after the shear pin body is not limited any more, the input flange and the output flange can be separated, and therefore overload protection on the exoskeleton joint is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shear pin type torque limiter, and relates to a shear pin type torque limiter for overload protection of exoskeleton joint. BACKGROUND

[0002] Exoskeleton technology has made significant progress in recent years in the fields of medical rehabilitation, military operations, industrial assistance, etc. Exoskeleton devices aim to enhance human functions and help users complete more complex and high-intensity tasks. However, in practical applications, exoskeleton joints face many challenges, among which the overload problem seriously affects the safety, stability, and service life of the device, restricting the further development and widespread application of exoskeleton technology.

[0003] According to the search, the publication (announcement) number CN213393225U: a torque overload protector is disclosed, which discloses "including input shaft, output disc, input shaft and output disc are connected through torque pin, the radial hole on both sides of output disc is equipped with limiting bolt to limit torque pin from falling off, to prevent torque pin from falling off during high-speed rotation, anti-retreat groove is set on input shaft to prevent input shaft and output shaft from disengaging after torque pin is cut off. When the working torque exceeds the predetermined torque range, the torque pin is cut off due to overload, and after the torque pin is cut off due to overload, only one torque pin needs to be replaced to continue normal use, etc. Technical scheme, with the technical effects of convenient use, good stability, convenient maintenance, and can select torque pins with different diameters and different materials according to the size of torque, wide application, etc.";

[0004] However, the above-mentioned comparative file, when the torque overload protector is used, the torque pin needs to be broken at both ends at the same time to quickly disengage the input shaft and the output disc. If only one end of the torque pin is broken when it breaks, the torque pin may still transmit torque to a certain extent, although the transmitted torque will decrease due to the damage of the shear pin, but it cannot achieve complete power cut-off, which may cause the overloaded load to continue to exert pressure on other parts of the device, and cannot effectively protect the device.

[0005] To solve the above problems, a shear pin type torque limiter for overload protection of exoskeleton joint is proposed in the present application. Utility model content

[0006] The utility model provides a shear pin type torque limiter for overload protection of exoskeleton joint in view of the technical problems existing in the prior art.

[0007] The utility model discloses a technical scheme that solves the above technical problem is as follows: a kind of exoskeleton joint overload protection's shear pin type torque limiter, including input flange and output flange, first through hole is opened on the input flange, second through hole is opened on the output flange, the output flange is connected with threaded sleeve by the second through hole of opening and threading, the inner wall of threaded sleeve is fixedly connected with spring, the one end of spring is fixedly connected with limit frame, the inner wall of limit frame is movably connected with shear pin body, the output flange is connected with fixed bolt by the second through hole of opening and threading, the one side of fixed bolt is pasted with the one end of shear pin body, the inside of shear pin body is fixedly connected with round bar, the one end of round bar is fixedly connected with rope, the end of rope away from round bar is fixedly connected with threaded rod, threaded slot is formed in the limit frame, the outer wall of threaded rod is connected with the threaded slot of limit frame formed by threading.

[0008] The outer wall of the shear pin body is fixedly connected with a rubber pad, which absorbs the instantaneous impact generating capacity.

[0009] The end of the shear pin body close to the fixed bolt is provided with a clamping groove, and the end of the fixed bolt close to the shear pin body is fixedly connected with a clamping block, and the outer wall of the clamping block is pasted with the clamping groove of the shear pin body, so that the shear pin body is further fixed, and the linkage of the input flange and the output flange is avoided.

[0010] The output flange is threadedly connected with a limiting bolt, the bottom of the limiting bolt is rotatably connected with a connecting rod, the end of the connecting rod away from the limiting bolt is fixedly connected with an arc-shaped plate, the outer wall of the input flange is provided with a circular groove, and the bottom of the arc-shaped plate is pasted with the circular groove of the input flange, so that the input flange is limited by the limiting bolt, the connecting rod, the arc-shaped plate and the circular groove.

[0011] The outer wall of the output flange is fixedly connected with a first positioning block, the outer wall of the input flange is fixedly connected with a second positioning block, and the end of the first positioning block is pasted with the end of the second positioning block, so that the connection position of the input flange and the output flange is preliminarily positioned by the first positioning block and the second positioning block, and the connection efficiency of the input flange and the output flange is avoided.

[0012] The inner wall of the output flange is fixedly connected with a protective ring, and the end of the input flange is pasted with one side of the protective ring, so that the equipment is protected by the protective ring, and the damage of the equipment caused by the debris splashed by the shear pin body is avoided.

[0013] The utility model discloses a technical scheme that solves the above technical problem is as follows: a kind of exoskeleton joint overload protection's shear pin type torque limiter, including input flange and output flange, first through hole is opened on the input flange, second through hole is opened on the output flange, the output flange is connected with threaded sleeve by the second through hole of opening and threading, the inner wall of threaded sleeve is fixedly connected with spring, the one end of spring is fixedly connected with limit frame, the inner wall of limit frame is movably connected with shear pin body, the output flange is connected with fixed bolt by the second through hole of opening and threading, the one side of fixed bolt is pasted with the one end of shear pin body, the inside of shear pin body is fixedly connected with round bar, the one end of round bar is fixedly connected with rope, the end of rope away from round bar is fixedly connected with threaded rod, threaded slot is formed in the limit frame, the outer wall of threaded rod is connected with the threaded slot of limit frame formed by threading.

[0014] When the shear pin type torque limiter is in use, if the shear pin body is broken, the breakage of the shear pin body will cause the breakage of the round rod, after the breakage of the round rod, the spring will pull the limiting frame into the inside of the threaded sleeve, after the limiting frame moves into the inside of the threaded sleeve, the limiting frame no longer limits the shear pin body, after the shear pin body is no longer limited, the input flange and the output flange are separated, so that the overload protection of the exoskeleton joint is realized.

[0015] By arranging the limiting bolt, the connecting rod, the arc-shaped plate and the circular groove, the input flange is limited, when the shear pin body is broken in use, the limiting bolt falls into the inside of the circular groove, at this moment, the input flange is prevented from separating from the range of the output flange under the action of the arc-shaped plate and the circular groove, the input shaft is effectively prevented from separating from the output disc, and the safety of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a whole structure schematic diagram is shown for demonstration.

[0017] Figure 2 The utility model discloses a threaded sleeve and its related part structure schematic diagram is shown for demonstration.

[0018] Figure 3 The utility model discloses a limiting frame and its related part structure schematic diagram is shown for demonstration.

[0019] In the drawings, the component list represented by each sign is as follows:

[0020] 1, input flange;2, output flange;3, first through hole;4, second through hole;5, shear pin body;6, threaded sleeve;7, spring;8, limiting frame;9, round rod;10, rope;11, threaded rod;12, threaded groove;13, fixed bolt;14, rubber pad;15, clamping block;16, clamping groove;17, limiting bolt;18, connecting rod;19, arc-shaped plate;20, circular groove;21, first positioning block;22, second positioning block;23, protection ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] In the description of the present application, the terms "first", "second", are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] In the description of the present application, the term "for example" is used to indicate "as an example, illustration or description". Any embodiment described as "for example" in the present application is not necessarily interpreted as more preferred or more advantageous than other embodiments. The following description is given in order to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that those skilled in the art can recognize that the present application can be implemented without using these specific details. In other examples, well-known structures and processes will not be described in detail to avoid unnecessary details making the description of the present application obscure. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope in accordance with the principles and characteristics disclosed in the present application.

[0024] Referring to Figures 1-3 A shear pin type torque limiter for exoskeleton joint overload protection, comprising an input flange 1 and an output flange 2, the input flange 1 is used to access the output device of the input flange 1, the output flange 2 is used to access the output device, the first through hole 3 is opened on the input flange 1, the second through hole 4 is opened on the output flange 2, the threaded sleeve 6 is threadedly connected with the output flange 2 through the opened second through hole 4, the inner wall of the threaded sleeve 6 is fixedly connected with the spring 7, the threaded sleeve 6 is used to fix the spring 7, one end of the spring 7 is fixedly connected with the limiting frame 8, the spring 7 is used to realize the displacement and reset of the limiting frame 8, the inner wall of the limiting frame 8 is movably connected with the shear pin body 5, the limiting frame 8 is used to limit the shear pin body 5, the fixed bolt 13 is threadedly connected with the output flange 2 through the opened second through hole 4, the fixed bolt 13 is used to fix the shear pin body 5, one side of the fixed bolt 13 is attached to one end of the shear pin body 5, the inside of the shear pin body 5 is fixedly connected with the round rod 9, one end of the round rod 9 is fixedly connected with the rope 10, the round rod 9 is used to fix the rope 10, the rope 10 can slide after the round rod 9 breaks, one end of the rope 10 away from the round rod 9 is fixedly connected with the threaded rod 11, the rope 10 is used to connect the threaded rod 11, the limiting frame 8 is provided with a threaded groove 12, the outer wall of the threaded rod 11 is threadedly connected with the threaded groove 12 provided on the limiting frame 8, the limiting frame 8 is pulled through the cooperation of the threaded rod 11 and the threaded groove 12.

[0025] Referring to Figure 2The outer wall of the shear pin body 5 is fixedly connected with a rubber pad 14, which is used to absorb the energy generated by instantaneous impact, thereby providing buffering for the equipment and reducing the risk of damage to other components.

[0026] With reference to Figures 1-3 The shear pin body 5 is provided with a clamping groove 16 near one end of the fixing bolt 13. The fixing bolt 13 is fixedly connected with a clamping block 15 near one end of the shear pin body 5. The outer wall of the clamping block 15 is in close contact with the clamping groove 16 of the shear pin body 5. The cooperation of the clamping block 15 and the clamping groove 16 can further fix the shear pin body 5, avoiding the situation that the shear pin body 5 shakes during use, thereby avoiding affecting the linkage of the input flange 1 and the output flange 2.

[0027] With reference to Figure 1 And Figure 2 The output flange 2 is threadedly connected with a limiting bolt 17. The bottom of the limiting bolt 17 is rotatably connected with a connecting rod 18. The rotation of the limiting bolt 17 drives the connecting rod 18 to move downward. The end of the connecting rod 18 away from the limiting bolt 17 is fixedly connected with an arc-shaped plate 19. The downward movement of the connecting rod 18 drives the arc-shaped plate 19 to move downward. The outer wall of the input flange 1 is provided with a circular groove 20. The bottom of the arc-shaped plate 19 is in close contact with the circular groove 20 of the input flange 1. Through the cooperation of the arc-shaped plate 19 and the circular groove 20, the input flange 1 is prevented from moving out of the range of the output flange 2, effectively preventing the input shaft from being separated from the output disc, and improving the safety of the equipment.

[0028] With reference to Figure 1 The outer wall of the output flange 2 is fixedly connected with a first positioning block 21. The outer wall of the input flange 1 is fixedly connected with a second positioning block 22. One end of the first positioning block 21 is in close contact with one end of the second positioning block 22. The cooperation of the first positioning block 21 and the second positioning block 22 can preliminarily position the connection position of the input flange 1 and the output flange 2, thereby avoiding affecting the connection efficiency of the input flange 1 and the output flange 2.

[0029] With reference to Figure 2 The inner wall of the output flange 2 is fixedly connected with a protective ring 23. One end of the input flange 1 is in close contact with one side of the protective ring 23. The protective ring 23 is used to protect the equipment, preventing the debris generated by the rupture of the shear pin body 5 from flying out, thereby avoiding damage to the equipment caused by the debris flying out of the shear pin body 5.

[0030] Working principle:

[0031] The shear pin type torque limiter of the exoskeleton joint overload protection, when the shear pin type torque limiter is in use, if the shear pin body 5 breaks, the breakage of the shear pin body 5 will cause the breakage of the round rod 9, after the breakage of the round rod 9, the spring 7 will pull the limiting frame 8 into the inside of the threaded sleeve 6, after the limiting frame 8 moves into the inside of the threaded sleeve 6, the limiting frame 8 no longer limits the shear pin body 5, when the shear pin body 5 is no longer limited, the input flange 1 and the output flange 2 will be separated, so as to realize the overload protection of the exoskeleton joint, and simultaneously, after the breakage of the shear pin body 5 in use, the limiting bolt 17 will fall into the inside of the circular groove 20, at this time, the input flange 1 will be prevented from separating from the range of the output flange 2 under the action of the arc-shaped plate 19 and the circular groove 20, effectively preventing the input shaft from separating from the output disc, improving the safety of the equipment, when the shear pin body 5 breaks and needs to be replaced, first, the threaded sleeve 6 is separated from the output flange 2, at this time, the shear pin body 5 can be connected to the threaded sleeve 6 through the use of the threaded rod 11 and the threaded groove 12, after the shear pin body 5 is connected to the threaded sleeve 6, through the cooperation of the shear pin body 5 and the fixing bolt 13, the linkage of the input flange 1 and the output flange 2 is realized, so as to realize the use.

[0032] Although preferred embodiments of the present application have been described, those skilled in the art will be able to make additional changes and modifications to these embodiments once they have the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all changes and modifications that fall within the scope of the present application.

[0033] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. An exoskeleton joint overload protection shear pin torque limiter comprising an input flange (1) and an output flange (2), characterized in that, The first through hole (3) is opened on the input flange (1), the second through hole (4) is opened on the output flange (2), the threaded sleeve (6) is threadedly connected to the output flange (2) through the opened second through hole (4), the inner wall of the threaded sleeve (6) is fixedly connected with the spring (7), one end of the spring (7) is fixedly connected with the limiting frame (8), the inner wall of the limiting frame (8) is movably connected with the shear pin body (5), the output flange (2) is threadedly connected with the fixed bolt (13) through the opened second through hole (4), one side of the fixed bolt (13) is attached to one end of the shear pin body (5), the inside of the shear pin body (5) is fixedly connected with the round rod (9), one end of the round rod (9) is fixedly connected with the rope (10), the end of the rope (10) away from the round rod (9) is fixedly connected with the threaded rod (11), the limiting frame (8) is provided with the threaded groove (12), and the outer wall of the threaded rod (11) is threadedly connected with the threaded groove (12) of the limiting frame (8).

2. A shear pin torque limiter for exoskeleton joint overload protection according to claim 1, wherein, The outer wall of the shear pin body (5) is fixedly connected with the rubber pad (14).

3. The shear pin torque limiter for exoskeleton joint overload protection of claim 1, wherein, The end of the shear pin body (5) close to the fixed bolt (13) is provided with the clamping groove (16), and the end of the fixed bolt (13) close to the shear pin body (5) is fixedly connected with the clamping block (15), and the outer wall of the clamping block (15) is attached to the clamping groove (16) of the shear pin body (5).

4. The shear pin torque limiter for exoskeleton joint overload protection of claim 1, wherein, The limiting bolt (17) is threadedly connected to the output flange (2), the bottom of the limiting bolt (17) is rotatably connected with the connecting rod (18), the end of the connecting rod (18) away from the limiting bolt (17) is fixedly connected with the arc-shaped plate (19), the outer wall of the input flange (1) is provided with the circular groove (20), and the bottom of the arc-shaped plate (19) is attached to the circular groove (20) of the input flange (1).

5. The shear pin torque limiter for exoskeleton joint overload protection of claim 1, wherein, The outer wall of the output flange (2) is fixedly connected with the first positioning block (21), and the outer wall of the input flange (1) is fixedly connected with the second positioning block (22), one end of the first positioning block (21) is attached to one end of the second positioning block (22).

6. A shear pin torque limiter for exoskeleton joint overload protection according to claim 1, wherein, The inner wall of the output flange (2) is fixedly connected with the protective ring (23), and one end of the input flange (1) is attached to one side of the protective ring (23). The inner wall of the output flange (2) is fixedly connected with the protective ring (23), and one end of the input flange (1) is attached to one side of the protective ring (23).

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