CN218765745U - Multi-axis force sensor capable of preventing overload damage - Google Patents

Abstract

The utility model discloses a multi-axis force sensor for preventing overload damage, which comprises an upper stage body and a lower stage body which are oppositely arranged, wherein a plurality of force measuring columns are arranged between the upper stage body and the lower stage body, and strain gauges are arranged on the force measuring columns; still including protecting sheathing, protecting sheathing has and holds the chamber, goes up stage body fixed mounting and holds the intracavity at protecting sheathing, the periphery of lower stage body with protecting sheathing's the intracavity wall has the clearance, and when last stage body and lower stage body take place deformation and transship, the periphery of lower stage body can be with protecting sheathing's the intracavity wall looks butt in order to avoid the force measuring post overload damage between last stage body and the lower stage body to realize multiaxis force sensor's overload damage through reliable, effective simple overload prevention structure again.

Description

Multi-axis force sensor capable of preventing overload damage

Technical Field

The utility model relates to a sensor technical field especially relates to a multiaxis force transducer of overload damage prevention.

Background

The multi-axis force sensor mainly comprises an upper table body, a lower table body and a plurality of force measuring columns arranged between the upper table body and the lower table body so as to form an elastic body structure. When the multi-axis force sensor is used, the phenomenon of overload caused by accidents sometimes occurs, and overload damage is mainly shown in that the deformation between the upper table body and the lower table body is overlarge due to the overload of force acting on the upper table body and/or the lower table body, and the overload damage is caused by the overlarge deformation of the force measuring column positioned between the upper table body and the lower table body.

The existing multi-axis force sensor generally has the problem of lack of overload protection, a small number of multi-axis force sensors have the function of overload protection or realize overload protection through external devices, but the existing multi-axis force sensor often has the problems of complex structure, complex matching or overload protection only in a small number of directions, and the overload protection means is single, so that the overload protection of the multi-axis force sensor is difficult to effectively realize.

SUMMERY OF THE UTILITY MODEL

Not enough more than, the utility model provides a multiaxis force transducer of overload protection damage can solve current multiaxis force transducer and lack effectual overload protection's problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a multi-axis force sensor for preventing overload damage comprises an upper platform body and a lower platform body which are oppositely arranged, wherein a plurality of force measuring columns are arranged between the upper platform body and the lower platform body, and strain gauges are arranged on the force measuring columns; still including protective housing, protective housing has the appearance chamber, the upper table body fixed mounting be in protective housing's the appearance intracavity, the periphery of lower table body with protective housing's the intracavity wall has the clearance, and works as when the upper table body takes place deformation and transship with lower table body, the periphery of lower table body can with protective housing's the intracavity wall looks butt is in order to avoid between the upper table body and the lower table body dynamometry post overload damage.

Furthermore, a plurality of limiting holes are formed in one of the inner wall of the accommodating cavity of the protective shell and the peripheral side wall of the lower stage body in a circumferential direction, a plurality of limiting parts are fixedly arranged in the other one of the inner wall of the accommodating cavity of the protective shell in the circumferential direction, the limiting parts are locally positioned in the limiting holes and have gaps with the hole walls of the limiting holes, and when the upper stage body and the lower stage body deform and are overloaded, the limiting parts can be abutted against the hole walls of the limiting holes so as to avoid overload damage of the force measuring columns of the upper stage body and the lower stage body.

Furthermore, a plurality of lower stage body pinholes are formed in the periphery of the lower stage body in a circumferential direction, the limiting parts are pins and fixed in the lower stage body pinholes and partially extend out of the lower stage body pinholes, a plurality of protective shell pinholes are formed in the inner wall of the accommodating cavity of the protective shell in the circumferential direction to form the limiting holes, and the protective shell pinholes penetrate through the side wall of the protective shell.

Furthermore, a plurality of protective shell pin holes are formed in the inner wall of the accommodating cavity of the protective shell in the circumferential direction, the protective shell pin holes penetrate through the side wall of the protective shell, the limiting parts are pins and are fixed in the protective shell pin holes, the local parts of the limiting parts extend inwards out of the protective shell pin holes, and a plurality of lower platform body pin holes are formed in the periphery of the lower platform body in the circumferential direction to form the limiting holes.

Furthermore, the dynamometry post is provided with the reinforcement in the position department towards the bottom that holds the chamber of protective housing, the reinforcement with the bottom that holds the chamber of protective housing has the clearance between, and works as go up stage body and lower stage body when deformation and overload take place, the locating part can with protect the pore wall looks butt in order to avoid go up stage body and lower stage body dynamometry post overload damage.

Further, a protection ring covers the joint of the protection shell and the lower table body.

Further, the outer side of a protective shell pin hole on the protective shell is covered with a protective sleeve or is filled with a protective plaster.

Further, the peripheral side wall of the lower table body far away from the upper table body is a complete peripheral side wall.

Furthermore, the force measuring column is a T-shaped force measuring column, an I-shaped force measuring column or an I-shaped force measuring column.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a multiaxis force transducer of overload damage prevention, the limiting displacement to the lower stage body through protective housing's appearance intracavity wall to when the last stage body and lower stage body take place deformation and transship, the periphery of lower stage body can with protective housing's appearance intracavity wall looks butt and can't continue deformation, thereby can avoid the dynamometry post overload damage between the last stage body and the lower stage body, in order to realize multiaxis force transducer's overload damage through reliable, effective simple overload protection structure again.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural view of the overload damage prevention multi-axis force sensor of the present invention;

FIG. 2 is a schematic cross-sectional view of the overload damage prevention multi-axis force sensor of the present invention;

fig. 3 is a schematic structural view of the upper stage body, the force measuring column, the lower stage body and the strain gauge of the present invention at a viewing angle;

fig. 4 is a schematic structural view of the upper stage, the force measuring column, the lower stage and the strain gauge of the present invention at another viewing angle.

Wherein the labels shown in the figures are: 10-upper stage body; 11-a first groove; 20-lower stage body; 21-a second groove; 30-a force measuring column; 31-transverse force measuring arm; 32-vertical force measuring arm; 33-a reinforcement; 40-strain gauge; 50-a protective housing; 61-a limiting hole; 62-a stop; 60-a guard ring; 70-protective plaster.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inner", "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships usually placed when the utility model is used, and are only for convenience of description and simplification of the description, but not for indication or suggestion that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1 to 4, a preferred embodiment of the present invention provides a multi-axis force sensor for preventing overload damage, which includes an upper stage 10, a lower stage 20 and a protective casing 50, which are oppositely disposed. A plurality of force measuring columns 30 are arranged between the upper table body 10 and the lower table body 20, strain gauges 40 are arranged on the force measuring columns 30, and an elastic body structure is formed among the upper table body 10, the lower table body 20 and the force measuring columns 30. The protection housing 50 has the appearance chamber, and the upper stage body 10 fixed mounting is held the intracavity at the protection housing 50, and the periphery of lower stage body 20 has the clearance with the appearance intracavity wall of protection housing 50, and when upper stage body 10 and lower stage body 20 take place deformation and transship, the periphery of lower stage body 20 can be with the appearance intracavity wall looks butt of protection housing 50 in order to avoid the excessive load damage of the column of measuring force 30 between upper stage body 10 and the lower stage body 20.

The lower stage body 20 is located in the cavity of the protective casing 50, and a gap is formed between the periphery of the lower stage body 20 and the inner wall of the cavity of the protective casing 50 to ensure that a certain space is provided so that the force measuring column 30 deforms when the upper stage body 10 and the lower stage body 20 are stressed. The inner wall of the cavity of the protective housing 50 has a limiting function, so that when the upper stage 10 and the lower stage 20 deform and are overloaded, the periphery of the lower stage 20 can abut against the inner wall of the cavity of the protective housing 50 and cannot deform continuously, and the overload damage of the force measuring column 30 between the upper stage 10 and the lower stage 20 can be avoided.

It can be understood that, the size of the gap between the outer periphery of the lower stage body 20 and the inner wall of the accommodating cavity of the protective casing 50 should be reasonable, on one hand, enough gap is needed for the upper stage body 10 and the lower stage body 20 to deform, and on the other hand, when the upper stage body 10 and the lower stage body 20 are needed to deform and overload, the outer periphery of the lower stage body 20 can be made to timely abut against the inner wall of the accommodating cavity of the protective casing 50 so as to avoid continuous deformation and overload damage. The gaps between the outer periphery of the lower stage 20 and the inner wall of the cavity of the protective casing 50 are consistent at various positions, and in an exemplary preferred embodiment, the lower stage 20 is of a cylindrical stage structure as a whole, and in this case, the cavity of the protective casing 50 is also a circular cavity, and the two cavities are coaxially arranged.

In the present invention, in the preferred embodiment, the peripheral sidewall of the lower stage 20 far away from the upper stage 10 is a complete peripheral sidewall, and at this time, the lower stage 20 is complete (the periphery is uninterrupted), and the peripheral sidewall thereof is continuous, therefore, 360 circumferential, uniform and slight gaps are provided between the inner walls of the lower stage 20 and the cavity of the protection housing 50, and when the sensor is overloaded, the gap can provide 360 ° overload protection. In the conventional multi-axis force sensor with discontinuous peripheral side walls of the lower stage body, even if the protective shell 50 is arranged to realize overload limiting, protection can not be provided for each working condition (force loading point) due to the discontinuous peripheral side walls. It is understood that in other preferred embodiments, the lower stage body 20 may be formed such that the entire peripheral sidewall is a complete peripheral sidewall.

In a preferred embodiment, referring to fig. 1 to 4, a plurality of limiting holes 61 are formed around the circumferential direction on the inner wall of the receiving cavity of the protective housing 50, the plurality of limiting holes 61 are uniformly distributed, a plurality of limiting members 62 are circumferentially disposed around the outer periphery of the lower stage 20, the limiting members 62 protrude out of the outer periphery of the lower stage 20 and are located in the limiting holes 61, and a gap is formed between the limiting members 62 and the hole walls of the limiting holes 61, and when the upper stage 10 and the lower stage 20 deform and overload, the limiting members 62 can abut against the hole walls of the limiting holes 61 to prevent the force measuring columns 30 of the upper stage 10 and the lower stage 20 from being damaged due to overload.

The spacing member 62 has a gap with the hole wall of the spacing hole 61 to ensure a certain space so that the force measuring column 30 can deform when the upper stage 10 and the lower stage 20 are stressed. The hole wall of the limiting hole 61 has a limiting effect, so that when the upper stage body 10 and the lower stage body 20 deform and overload, the limiting part 62 can abut against the hole wall of the limiting hole 61 and cannot deform continuously, and overload damage to the force measuring column 30 between the upper stage body 10 and the lower stage body 20 can be avoided. It can be understood that, the size of the gap between the limiting member 62 and the hole wall of the limiting hole 61 should be reasonable, on one hand, there needs to be enough gap for the upper stage 10 and the lower stage 20 to deform, and on the other hand, when the upper stage 10 and the lower stage 20 need to deform and overload, the limiting member 62 and the hole wall of the limiting hole 61 can be in timely abutting joint to avoid continuous deformation and overload damage.

In an exemplary embodiment, as shown in fig. 1 to 4, a lower platform pin hole is formed around the circumference of the lower platform 20, the limiting member 62 is a pin fixed in the lower platform pin hole and partially extending outward from the lower platform pin hole, a plurality of protective shell pin holes are formed around the circumference of the inner wall of the cavity of the protective shell 50 to form a limiting hole 61, and the protective shell pin holes penetrate through the side wall of the protective shell 50. The protective shell pin hole penetrating through the side wall of the protective shell 50 can facilitate the insertion of the limiting member 62, which is a pin, into the lower stage body pin hole and fix the pin in the lower stage body pin hole by interference fit or threaded connection, that is, the installation and fixation of the limiting member 62 are facilitated. In a preferred embodiment, the position-limiting member 62 is a cylindrical pin, and correspondingly, the lower platform pin hole is a circular pin hole, and the position-limiting member 62 and the lower platform pin hole are coaxially arranged.

In another exemplary embodiment, a plurality of protective shell pin holes are circumferentially formed in the inner wall of the cavity of the protective shell 50, the protective shell pin holes penetrate through the side wall of the protective shell 50, the limiting members 62 are pins fixed in the protective shell pin holes and partially extend inward out of the protective shell pin holes, and a plurality of lower stage pin holes are circumferentially formed in the outer periphery of the lower stage 20 to form the limiting holes 61. In a preferred embodiment, the position-limiting member 62 is a cylindrical pin, and correspondingly, the protective-shell pin hole is a circular pin hole, and the position-limiting member 62 and the protective-shell pin hole are coaxially arranged. In the preferred embodiment, the limiting member 62 is fixed on the protective casing 50 through a sleeve-shaped fixing sleeve, the fixing sleeve is preferably made of stainless steel to have a certain strength, one end of the limiting member 62 is fixedly sleeved in the fixing sleeve, and the fixing sleeve is sleeved in the pin hole of the protective casing and is in interference fit, so that the limiting member 62 is fixed on the protective casing 50.

Whether the limiting hole 61 is formed in the inner wall of the cavity of the protective housing 50 and the limiting piece 62 is arranged on the outer periphery of the lower stage 20, or the limiting hole 61 is formed in the outer peripheral side wall of the lower stage 20 and the limiting piece 62 is arranged on the inner wall of the cavity of the protective housing 50, the processing or installation fixing of the limiting hole 61 and the limiting piece 62 can be facilitated, the centering of the limiting hole 61 and the limiting piece 62 can be facilitated, and the all-around and all-angle overload protection can be facilitated.

Further, the force measuring column 30 is provided with a reinforcing member 33, the reinforcing member 33 is disposed at a position of the force measuring column 30 facing the bottom of the cavity of the protective casing 50, at this time, a gap is formed between the reinforcing member 33 and the bottom of the cavity of the protective casing 50, and when the upper stage body 10 and the lower stage body 20 are deformed and overloaded, the limiting member 62 can abut against the hole wall of the limiting protecting hole 51 to avoid overload damage to the force measuring column 30 of the upper stage body 10 and the lower stage body 20. Similarly, the size of the gap between the accommodating cavities of the reinforcing member 33 and the protective casing 50 should be reasonable, and the gap between the accommodating cavities of the reinforcing member 33 and the protective casing 50 can ensure that the sufficient gap can deform the upper stage body 10 and the lower stage body 20, and when the upper stage body 10 and the lower stage body 20 deform and overload, the inner cavities of the reinforcing member 33 can be abutted to avoid continuous deformation and overload damage to the side surface of the reinforcing member 33 far away from the vertical force measuring arm 32 and the side surface of the protective casing 50 in time. Through this setting, can effectively avoid the overload damage of dynamometry post 30, especially to the load unanimous with the extending direction of vertical dynamometry arm 32, cooperation locating part 62 and spacing hole 61, its overload protection effect is obvious.

The utility model discloses a multiaxis force sensor, through the cooperation between the appearance intracavity wall of the periphery of lower stage body 20 and protecting casing 50, locating part 62 and the cooperation between the pore wall of protecting spacing hole 61 and the cooperation between the appearance intracavity wall of reinforcement 33 and protecting casing 50 etc. can effectively avoid the dynamometry post 30 between upper stage body 10 and the lower stage body 20 to take place overload damage, also be an overload damage prevention multiaxis force sensor.

The joint of the protective casing 50 and the lower stage body 20 is covered with a protective ring 60 to realize sealing and achieve the purposes of water resistance and dust resistance. The outer side of the pin hole of the protection shell 50 is covered with a protection sleeve or is filled with a protection patch 70 to realize sealing and achieve the purposes of water and dust prevention. When the protection cover is arranged, the protection cover 70 is arranged to cover the peripheral side wall of the protection shell 50 corresponding to the protection shell pin hole, and when the protection patch 70 is arranged, the protection patch 70 is stuffed at the position of the protection shell pin hole on the protection shell 50, which faces to the outer hole. The protection ring 60 and the protection patch 70 may be made of flexible rubber, silicone, or a flexible film-like solid structure formed by solidifying liquid glue, or may be made of other materials.

The utility model discloses a multiaxis force transducer, force measuring column 30 can be T type force measuring column, I type force measuring column or "worker" style of calligraphy force measuring column, or the force measuring column of other types.

In a preferred embodiment, the force cylinder 30 of the multi-axis force sensor may be a T-shaped force cylinder, for example.

Specifically, the force measuring column 30 includes a horizontal force measuring arm 31 and a vertical force measuring arm 32, one end of the vertical force measuring arm 32 is fixedly connected with the middle of the horizontal force measuring arm 31, two ends of the horizontal force measuring arm 31 are fixedly connected with the peripheral wall of the upper stage 10, the other end of the vertical force measuring arm 32 is fixedly connected with the lower stage 20, and strain gauges 40 are arranged at two ends of the horizontal force measuring arm 31 and on the vertical force measuring arm 32.

The strain gauge 40 is arranged at a predetermined position of the horizontal force measuring arm 31 and the vertical force measuring arm 32, so that when the upper stage body 10 and the lower stage body 20 are stressed, the force measuring column 30 is deformed, and further, the strain gauge 40 is mechanically deformed, so as to realize the detection of the force. In the utility model, the force measuring column 30 of the T-shaped structure only needs to be provided with the transverse force measuring arm 31 at the peripheral wall of the upper stage body 10, and the peripheral wall of the lower stage body 20 does not have the transverse force measuring arm 31, so that the required slotting is relatively less, the lower stage body 20 does not need to be slotted, i.e. does not need to cut more materials, the multi-axis force sensor is not easy to deform under stress, the structure is more compact, and excessive additional parts are not needed to be added to assist in realizing the sealing of the lower stage body 20 to prevent water and dust; the relatively more complete end face of the lower table body 20 can ensure that the connection structure form of four screw holes and one pin hole can be realized so as to meet the ISO standard of the cooperative robot flange; meanwhile, the force measuring column 30 is of a T-shaped structure, the structural rigidity of the T-shaped beam is high, deformation of the sensor is reduced after stress, and the dynamic response frequency is obviously improved.

In the preferred embodiment, the vertical force-measuring arm 32 is fixedly connected to the middle of the horizontal force-measuring arm 31 and perpendicular to each other so that the force-measuring column 30 forms the T-shaped structure. The strain gages 40 arranged on both end portions of the lateral force-measuring arm 31 are symmetrically arranged with respect to the vertical force-measuring arm 32; the strain gauge 40 arranged on the vertical force-measuring arm 32 is located in the middle of the vertical force-measuring arm 32. The strain gauge 40 may be located on one side of the transverse force-measuring arm 31 and/or the vertical force-measuring arm 32, or may be located on both sides of the transverse force-measuring arm 31 and the vertical force-measuring arm 32. It is understood that in some preferred embodiments, the strain element 40 may be formed by a plurality of strain gauges in a certain positional relationship, wherein the strain gauge 40 may be a resistance strain gauge, which is made based on a strain effect, that is, when a conductor or a semiconductor material is mechanically deformed by an external force, a resistance value of the conductor or the semiconductor material is correspondingly changed. The strain gauge 40 may be a metal strain gauge, an optical strain gauge, or the like, and is not particularly limited.

In the preferred embodiment, the upper stage 10 and the lower stage 20 are both cylindrical stage structures, but it should be understood that in other preferred embodiments, the overall structural shapes of the upper stage 10 and the lower stage 20 may be other forms, such as square or other shapes. The upper stage 10 and the lower stage 20 are disposed opposite to each other and in parallel.

The force measuring columns 30 are three or more, preferably three in the present exemplary embodiment, and may be four, five or more in other preferred embodiments. A plurality of force measuring columns 30 are distributed between the upper stage 10 and the lower stage 20 and are located at the peripheral walls of the upper stage 10 and the lower stage 20, respectively. A plurality of force posts 30 are evenly distributed around the circumference.

In a preferred embodiment, the peripheral wall of the upper stage 10 is provided with first grooves 11, the number of the first grooves 11 is the same as the number of the force measuring columns 30, two end portions of the transverse force measuring arm 31 are fixedly connected with two side groove walls of the first grooves 11 respectively and are not connected with the inner wall of the first grooves 11, and at this time, the transverse force measuring arm 31 is integrally located in the first grooves 11. The first groove 11 may or may not penetrate through the upper stage body 10. In an exemplary embodiment, in order to reduce the overall thickness of the upper stage body 10, the upper stage body 10 is made to have a smaller thickness, and at this time, the first groove 11 completely penetrates through the upper stage body 10, so that the first groove 11 has enough space to accommodate the lateral force measuring arm 31.

The other end of the vertical force-measuring arm 32 can be directly connected to the end face of the lower platform 20 facing the upper platform 10. However, in order to further reduce the overall volume of the upper stage 10 and the lower stage 20 and to make the structure more compact, the upper stage 10 and the lower stage 20 should be as close as possible. Based on this, in a preferred embodiment, the end surface of the lower stage body 20 facing the upper stage body 10 is provided with second grooves 21, the number of the second grooves 21 is consistent with that of the first grooves 11, the second grooves 21 are arranged opposite to the first grooves 11, the other end portion of the vertical force measuring arm 32 is fixedly connected with the bottom of the second groove 21, and at this time, the vertical force measuring arm 32 is locally located in the second grooves 21, so that the upper stage body 10 and the lower stage body 20 can be further close to each other under the condition that the length of the vertical force measuring arm 32 can be maintained.

In order to ensure the overall structure of the lower stage body 20, ensure the strength of the lower stage body 20 and provide screw holes and pin holes for the sufficient position of the end surface of the lower stage body 20, and avoid the influence of sealing caused by excessive grooving of the lower stage body 20 on water resistance and dust resistance, the depth of the second groove 21 should not be too deep, and the depth should be within a reasonable range. Illustratively, in a preferred embodiment, the ratio of the depth of the second groove 21 to the thickness of the lower stage 20 at the position where the second groove 21 is formed is not more than 2/5. That is, the peripheral sidewall of the lower stage 20 far from the upper stage 10 is a complete peripheral sidewall, so as to ensure that the lower stage 20 is complete and the peripheral sidewall is continuous, therefore, a 360 ° circumferential, uniform and slight gap is formed between the lower stage 20 and the inner wall of the cavity of the protection housing 50, and when the sensor is overloaded, the gap can provide 360 ° overload protection.

In the preferred embodiment, the reinforcement member 33 is disposed in the middle of the transverse force-measuring arm 31, and one end of the vertical force-measuring arm 32 is fixedly connected to the reinforcement member 33. The overall thickness of the reinforcement member 33 is thicker than that of the transverse force-measuring arm 31, and the reinforcement member 33 is used for making the position of the reinforcement less sensitive to the force variation when the measurement is performed, and more sensitive to the force variation where the reinforcement member 33 is not arranged, so that the measurement sensitivity and accuracy are improved.

The utility model discloses in, horizontal force measuring arm 31 and last stage body 10, and the position department circular arc transition that vertical force measuring arm 32 and lower stage body 20 are connected, and when being provided with reinforcement 33, the position department circular arc transition that horizontal force measuring arm 31 and vertical force measuring arm 32 and reinforcement 33 are connected, through the circular arc transition, the reliability of connecting enough strengthens, avoid fracture or fracture in the junction, simultaneously can make the hookup location relatively insensitive to the change of power, the position that sets up foil gage 40 correspondingly this moment is relatively sensitive to the change of power, increase measuring sensitivity and precision.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (9)

1. The utility model provides an overload damage's multiaxis force transducer, is including last stage body (10) and lower stage body (20) that set up in opposite directions, be provided with a plurality of dynamometry posts (30) between last stage body (10) and lower stage body (20), arranged strain gauge (40) on dynamometry post (30), its characterized in that: still including protecting sheathing (50), protecting sheathing (50) have and hold the chamber, the upper table body (10) fixed mounting be in the appearance intracavity of protecting sheathing (50), the periphery of lower table body (20) with the appearance intracavity wall of protecting sheathing (50) has the clearance, and works as the upper table body (10) and lower table body (20) take place deformation and when transshipping, the periphery of lower table body (20) can with the appearance intracavity wall looks butt of protecting sheathing (50) is in order to avoid between upper table body (10) and lower table body (20) dynamometry post (30) overload damage.

2. The overload damage prevention multi-axis force sensor of claim 1, wherein: the utility model discloses a pressure measuring column (30) overload damage, including the outer peripheral lateral wall of lower stage body (20), the appearance intracavity wall of protecting sheathing (50) with one among the peripheral lateral wall of lower stage body (20) has seted up a plurality of spacing holes (61) around circumference, and another is fixed around circumference and is equipped with a plurality of locating parts (62), locating part (62) local be located in spacing hole (61) and with the pore wall of spacing hole (61) has the clearance, and works as go up stage body (10) and lower stage body (20) and take place deformation and when transshipping, locating part (62) can with the pore wall looks butt of spacing hole (61) is in order to avoid go up stage body (10) and lower stage body (20) pressure measuring column (30) overload damage.

3. The overload damage prevention multi-axis force sensor of claim 2, wherein: a plurality of lower stage body pinholes are arranged around circumference in the periphery of the lower stage body (20), the limiting parts (62) are pins and fixed in the lower stage body pinholes and partially extend out of the lower stage body pinholes, a plurality of protective shell pinholes are arranged around circumference in the cavity inner wall of the protective shell (50) to form the limiting holes (61), and the protective shell pinholes run through the side wall of the protective shell (50).

4. The overload damage prevention multi-axis force sensor of claim 2, wherein: a plurality of protective housing pinholes are formed in the inner wall of the accommodating cavity of the protective housing (50) in a circumferential direction, the protective housing pinholes penetrate through the side wall of the protective housing (50), the limiting parts (62) are pins and fixed in the protective housing pinholes and partially and inwards extend out of the protective housing pinholes, and a plurality of lower platform pinholes are formed in the periphery of the lower platform (20) in a circumferential direction to form the limiting holes (61).

5. The overload damage prevention multi-axis force sensor of claim 2, wherein: the force measuring column (30) is provided with a reinforcing member (33) at the position towards the bottom of the cavity of the protective shell (50), a gap is formed between the reinforcing member (33) and the bottom of the cavity of the protective shell (50), and when the upper platform body (10) and the lower platform body (20) deform and overload, the limiting member (62) can be abutted against the hole wall of the limiting hole (61) to avoid overload damage to the force measuring column (30) of the upper platform body (10) and the lower platform body (20).

6. The overload damage prevention multi-axis force sensor of claim 1, wherein: the joint of the protective shell (50) and the lower table body (20) is covered with a protective ring (60).

7. The overload damage prevention multi-axis force sensor of claim 3, wherein: the outer side of a protective shell pin hole on the protective shell (50) is covered with a protective sleeve or is filled with a protective plaster (70).

8. The overload damage prevention multi-axis force sensor of claim 1, wherein: the peripheral side wall of the lower table body (20) far away from the upper table body (10) is a complete peripheral side wall.

9. The overload damage prevention multi-axis force sensor of claim 1, wherein: the force measuring column (30) is a T-shaped force measuring column, an I-shaped force measuring column or an I-shaped force measuring column.

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