CN212643310U - Mechanical limiting mechanism - Google Patents
Mechanical limiting mechanism Download PDFInfo
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- CN212643310U CN212643310U CN202021199135.2U CN202021199135U CN212643310U CN 212643310 U CN212643310 U CN 212643310U CN 202021199135 U CN202021199135 U CN 202021199135U CN 212643310 U CN212643310 U CN 212643310U
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Abstract
The utility model relates to the technical field of mechanical equipment, especially, relate to a machinery stop gear, it includes roating seat, spring arm, carries thing portion and strengthens the arm to four-bar linkage is constituteed to spring arm, roating seat, strengthening the arm and carrying thing portion, makes the up-and-down motion of carrying thing portion through the rotation of spring arm, and the contact through spring arm and strengthening the arm carries on spacingly. When the spring arm and the reinforcing arm drive the loading part to move downwards, the four-bar mechanism cannot rotate any more after the spring arm is abutted against the reinforcing arm, so that mechanical limit is realized, and the loading part can be prevented from falling; and need not to increase extra spare part, only realize different spacing height through the size of adjusting the spring arm and/or the size of strengthening the arm, convenient to use, and simple structure.
Description
Technical Field
The application relates to the technical field of mechanical equipment, in particular to a mechanical limiting mechanism.
Background
The balance arm system is a device which balances the load of a heavy object at the tail end by a spring (a mechanical spring or a gas spring) and enables the load to freely suspend without other external force in a certain space range. At present, the device is widely applied to equipment systems such as shadowless lamps, monitoring displays and the like in hospitals. As a suspension system, in a hospital equipment application environment, a functional spring component in a balance arm system has higher reliability within the allowable design load weight. However, due to the requirement of the detection standard of the medical equipment, a mechanical limiting mode must be provided to deal with the risk of load falling caused by spring failure (mechanical spring fatigue, spring breakage, gas spring failure and the like).
SUMMERY OF THE UTILITY MODEL
The application provides a machinery stop gear can prevent that the load from falling.
The application provides a mechanical stop gear, it includes:
a rotating base;
a spring arm, a first end of the spring arm being connected with the rotary base;
the carrying part is used for carrying a load, and the second end of the spring arm is connected with the carrying part;
the first end of the reinforcing arm is connected with the rotating seat, and the second end of the reinforcing arm is connected with the loading part, so that the spring arm, the rotating seat, the reinforcing arm and the loading part form a four-bar linkage;
the retention of the spring arm and the stiffening arm is achieved by the contact of the spring arm and the stiffening arm, and the variation of the height of the retention is achieved by adjusting the size of the spring arm and/or the size of the stiffening arm.
Furthermore, a first end of the spring arm is connected with the rotating seat through a first rotating shaft, and a second end of the spring arm is connected with the loading part through a second rotating shaft;
the first end of the reinforcing arm is connected with the rotating seat through a third rotating shaft, and the second end of the reinforcing arm is connected with the loading part through a fourth rotating shaft.
Further, the distance L3 between the contact position of the reinforcing arm and the spring arm and the axle center of the fourth rotating shaft and the radius R of the spring arm are in the following relationship:
wherein, L1 is the wheel base of the first rotating shaft and the third rotating shaft, L4 is the wheel base of the third rotating shaft and the fourth rotating shaft, H is the gap formed between the part of the reinforcing arm contacting the spring arm and the outer wall of the spring arm, and H is the distance of the object carrying part descending.
Further, the spring arms are arranged in a cylindrical structure, the reinforcing arms are arranged in a groove-shaped structure, and the opening of the groove-shaped structure faces the spring arms; the groove-shaped structure is internally provided with a support part, the support part extends along the height direction of the groove-shaped structure, and the top of the support part is used for being abutted against the spring arm.
Further, along the arm length direction of the reinforcing arm, the groove-shaped structure of the reinforcing arm comprises end plates arranged at two ends of the groove-shaped structure, and the end plates are connected with the side walls of the groove-shaped structure;
the side of the end plate facing the spring arm is formed into a curved surface, and the curved surface is matched with the cross-sectional shape of the spring arm.
Further, the spring arm is arranged to be a cylindrical structure, the outer surface of the cylindrical structure is a cylindrical surface, the surface, close to the spring arm, of the reinforcing arm is an arc surface, the arc surface is matched with at least part of the cylindrical surface, the arc surface is used for being abutted to the spring arm, and the reinforcing arm is arranged to be a hollow structure or a solid structure.
Further, the spring arm is provided as a cylindrical structure, and a face of the reinforcing arm close to the spring arm is a flat face for abutting against the spring arm.
Furthermore, the spring arm contacts with the reinforcing arm through a first limiting part of the spring arm, the reinforcing arm contacts with the spring arm through a second limiting part of the reinforcing arm, and the first limiting part is abutted against the second limiting part to limit the spring arm.
Further, the spring arm comprises a rod body, a spring is arranged in the rod body, one end of the spring is connected with the rod body, the other end of the spring is connected with the rotating seat, and the spring is always in a stretching state.
Further, the spring arm comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is fixedly connected with the spring arm, and the other end of the first connecting rod is hinged with the rotating seat;
one end of the second connecting rod is fixedly connected with the spring arm, and the other end of the second connecting rod is hinged with the carrying part.
The technical scheme provided by the application can achieve the following beneficial effects:
the application provides a machinery stop gear includes roating seat, spring arm, carries thing portion and strengthens the arm, and wherein, four-bar linkage is constituteed to spring arm, roating seat, enhancement arm and year thing portion, and the rotation through the spring arm makes and carries thing portion up-and-down motion, and under the circumstances that the elastic component of spring arm became invalid, the contact through spring arm and enhancement arm was carried on spacingly. When the spring arm and the reinforcing arm drive the loading part to move downwards, the four-bar mechanism cannot rotate further after the spring arm is abutted against the reinforcing arm, so that mechanical limit is realized, and the loading part can be prevented from falling; and need not to increase extra spare part, only realize different spacing height through the size of adjusting the spring arm and/or the size of strengthening the arm, convenient to use, and simple structure.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a mechanical limiting mechanism provided in an embodiment of the present application;
FIG. 2 is a front view of a mechanical spacing mechanism provided in an embodiment of the present application;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 according to an embodiment of the present application;
FIG. 4 is a cross-sectional view of another embodiment of the present application taken along line A-A of FIG. 2;
FIG. 5 is a cross-sectional view of an alternative embodiment of the present application taken along line A-A of FIG. 2;
FIG. 6 is a cross-sectional view A-A of FIG. 2 according to yet another embodiment of the present application;
fig. 7 is a partial cross-sectional view of a mechanical spacing mechanism provided in an embodiment of the present application.
Reference numerals:
1-a horizontal arm;
2-a rotating seat;
3-a spring arm;
31-a first shaft;
32-a second shaft;
33-a first limiting part;
34-a first link;
35-a second link;
36-a rod body;
37-a spring;
4-a loading part;
5-a reinforcing arm;
51-a third shaft;
52-a fourth shaft;
53-a second stop;
54-support member.
Detailed Description
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.
In one embodiment, the present application is described in further detail below with reference to specific embodiments and accompanying drawings.
As shown in fig. 1-3 and 7, the present application provides a mechanical limiting mechanism, which includes a rotating base 2, a spring arm 3, a carrying part 4 and a reinforcing arm 5, wherein the spring arm 3, the rotating base 2, the reinforcing arm 5 and the carrying part 4 form a four-bar linkage, and the connection of the components in the four-bar linkage is a rotatable connection, the carrying part 4 moves up and down by the rotation of the spring arm 3, and in case of failure of an elastic element of the spring arm 3, the limiting mechanism limits the position by the contact of the spring arm 3 and the reinforcing arm 5. When the spring arm 3 and the reinforcing arm 5 drive the loading part 4 to move downwards, the four-bar linkage mechanism cannot rotate further after the spring arm 3 is abutted against the reinforcing arm 5, so that mechanical limit is realized, and the loading part can be prevented from falling; and need not to increase extra spare part, only realize different spacing height through the size of adjusting spring arm 3 and/or the size of strengthening arm 5, convenient to use, and simple structure. In addition, mechanical stop gear still includes horizontal arm 1, and horizontal arm 1 is connected with mechanical equipment, and roating seat 2 is installed in horizontal arm 1, and horizontal arm 1 can drive roating seat 2 motion to revolving seat 2 supports.
The dimensions of the spring arm 3 and/or the dimensions of the reinforcing arm 5 are specifically intended to include the shape and the dimensions of the shape and to be different for the different configurations adopted for the spring arm 3 and/or the reinforcing arm 5. Specifically, when the cross section of the spring arm 3 perpendicular to the arm length direction is rectangular, the size of the spring arm 3 may be the length, width, diagonal line, etc. of the cross section of the spring arm 3, and for example, when the cross section of the spring arm 3 perpendicular to the arm length direction is elliptical, the size of the spring arm 3 may be the major axis or minor axis of the cross section of the spring arm 3; or when the reinforcing arm 5 has a groove-like structure, the size of the reinforcing arm 5 may be the diameter of the groove, the depth of the groove, or the like.
Specifically, a first end of the spring arm 3 is connected with the rotating base 2 through a first rotating shaft 31, a second end of the spring arm 3 is connected with the loading part 4 through a second rotating shaft 32, and two ends of the spring arm 3 are respectively hinged with the rotating base 2 and the loading part 4; the first end of the reinforcing arm 5 is connected with the rotating base 2 through a third rotating shaft 51, and the second end of the reinforcing arm 5 is connected with the object carrying part 4 through a fourth rotating shaft 52, so that the two ends of the reinforcing arm 5 are respectively hinged with the rotating base 2 and the object carrying part 4; and then make spring arm 3, roating seat 2, strengthen arm 5 and carry thing portion 4 and constitute four-bar linkage, and the connection of each component in the four-bar linkage is rotatable connection, and the spring arm 3 of being convenient for and strengthen arm 5 and rotate to drive and carry thing portion 4 up-and-down motion.
Wherein, in the preferred embodiment of the present application, the spring arm 3 is a cylindrical structure, and different limiting heights are realized by adjusting the radius of the spring arm 3 or the height of the reinforcing arm 5. In other embodiments of the present application, the spring arm 3 is a cylinder structure, and different limiting heights are realized by adjusting the outer diameter of the spring arm 3 or the height of the reinforcing arm 5. Different limiting heights are realized by adjusting the size of the spring arm 3 and/or the size of the reinforcing arm 5, and the device has the advantages of simple structure and convenience in use.
When the length of the spring arm 3 is constant, the distance between the spring arm 3 and the reinforcing arm 5 can be gradually reduced until the spring arm 3 contacts the reinforcing arm 5 as the spring arm 3 swings downward. After the spring arm 3 abuts against the reinforcing arm 5, the four-bar linkage cannot further rotate, so that the spring arm 3 and the reinforcing arm 5 can stop rotating due to the interaction between the spring arm 3 and the reinforcing arm 5, the loading part 4 also stops moving, and the four-bar linkage plays a role of limiting.
In one embodiment, as shown in fig. 3, the distance L3 between the contact portion of the reinforcing arm 5 with the spring arm 3 and the axial center of the fourth rotating shaft 52 and the radius R of the spring arm 3 is as follows:
where L1 is the axial distance between the first rotating shaft 31 and the third rotating shaft 51, L4 is the axial distance between the third rotating shaft 51 and the fourth rotating shaft 52, H is the gap formed between the portion of the reinforcing arm 5 in contact with the spring arm 3 and the outer wall of the spring arm 3, and H is the distance by which the loading portion 4 descends.
Therefore, according to the formula, it is easy to find that different limit height requirements can be realized only by adjusting the gap formed between the part of the reinforcing arm 5, which is in contact with the spring arm 3, and the outer wall of the spring arm 3. Further, since the contact position of the reinforcing arm 5 with the spring arm 3 varies in different embodiments, h varies depending on the actual structure of the two. In the embodiments of the present application, h is an exemplary description, and h in the present application may refer to a minimum distance between an outer surface of the spring arm 3 and an upper surface of the reinforcing arm 5, a radial direction along a cross section of the spring arm 3 (when the spring arm is a cylinder), a distance between the outer surface of the spring arm 3 and the upper surface of the reinforcing arm 5, a distance between the outer surface of the spring arm 3 and a top of a sidewall of the reinforcing arm 5, or a distance between other contact portions between the two, and the like, as long as the adjustment of the limit position can be achieved by adjusting h.
It should be noted that when it is necessary to set the maximum distance for the object loading unit 4 to descend, the object loading unit 4 may be first descended to a set position (i.e. the object loading unit 4 is first descended to the lowest position), and then the axial distance L4 between the third rotating shaft 51 and the fourth rotating shaft 52 and the distance H for the object loading unit 4 to descend are measured, and the angle a can be calculated by the formula sin (a) H/L4. Since the distance between the axes of the first and third shafts 31, 51 can also be measured, the length of L2 is calculated from the formula L2-L1-cos (a), and L2 is the distance between the axes of the reinforcing arm 5 and the spring arm 3. Since the gap h formed between the portion of the reinforcing arm 5 in contact with the spring arm 3 and the outer wall of the spring arm 3 can be measured, the relationship between the distance L3 between the portion of the reinforcing arm 5 in contact with the spring arm 3 and the axis of the fourth rotating shaft 52 and the radius R of the spring arm 3 can be obtained by the equation h of L2-L3-R. By adjusting L3 and/or R, different limiting height requirements can be achieved.
In one embodiment, as shown in fig. 3, a portion of the spring arm 3 for contacting the reinforcing arm 5 is a first limiting portion 33, a portion of the reinforcing arm 5 for contacting the spring arm 3 is a second limiting portion 53, and the first limiting portion 33 abuts against the second limiting portion 53, so that when the elastic member of the spring arm 3 fails, the spring arm 3 abuts against the reinforcing arm 5, the four-bar mechanism cannot further rotate, and therefore the interaction between the spring arm 3 and the reinforcing arm 5 can stop the rotation of the spring arm 3 and the reinforcing arm 5, and the movement of the loading portion 4 is also stopped, thereby preventing the loading portion 4 from falling.
In one embodiment, as shown in fig. 3, the spring arm 3 is provided in a cylindrical configuration, the reinforcement arm 5 is provided in a trough-like configuration, the opening of the trough-like configuration facing the spring arm 3; inside the trough-like structure is provided a support 54, which support 54 projects from the bottom of the trough-like structure in the height direction H of the trough-like structure and extends in the length direction of the reinforcement arm 5, and the top of the support 54 is intended to abut against the spring arm 3. Support piece 54 and slot-shaped structure combination become "E" structure, can help the lateral wall to share the pressure of elastic arm 3 to the vertical direction of reinforcing arm 5 through support piece 54's setting, reduce the normal pressure that the both sides wall received to play the effect of protection to the reinforcing arm structure, improved the atress upper limit of reinforcing arm, and then strengthened spacing reliability. Meanwhile, the top of the supporting member 54 can serve as a second limiting portion 53, and after the first limiting portion 33 abuts against the second limiting portion 53, the spring arm 3 and the reinforcing arm 5 can stop rotating through interaction between the first limiting portion 33 and the second limiting portion 53, so that the spring arm 3 can be limited to continuously swing downwards.
Wherein, along the length direction of slot-like structure, the both sides wall that slot-like structure has forms arc cooperation portion for with spring arm butt, the top of both sides wall can be inclined plane or cambered surface etc. this moment, is used for with the outer wall cooperation of spring arm 3. The engaging portions of the side walls at both ends of the groove-like structure can be radially fitted to the spring arms 3 in the width direction of the groove-like structure, and are lower in height than the height of the side walls in the longitudinal direction of the groove-like structure.
Preferably, in order to improve the load bearing capacity of the reinforcing arm 5, the groove-shaped structure may further include two end plates disposed at two ends of the reinforcing arm 5 along the arm length direction of the reinforcing arm 5, and the two end plates are connected to two side walls of the groove-shaped structure, so that the groove-shaped structure is firmer. More preferably, the side of the two end plates facing the spring arm 3 is formed into a curved surface, and the curved surface can be matched with the cross-sectional shape of the spring arm 3, so that the relative movement of the spring arm 3 after contacting the reinforcing arm 5 is further limited, and the limiting reliability is improved. It is worth mentioning that in other embodiments of the present application, a plurality of supports (not shown) may be provided within the channel-like structure to enhance the reliability of the reinforcement arm 5.
In another embodiment, as shown in fig. 4 and 5, the spring arm 3 is configured as a cylindrical structure, the outer surface of the cylindrical structure is a cylindrical surface, the surface of the reinforcing arm 5 close to the spring arm 3 is an arc surface, the arc surface is at least partially matched with the cylindrical surface, and the arc surface is used for abutting against the spring arm 3. The cambered surface can be used as a second limiting part 53, a cylindrical surface matched with the cambered surface can be used as a first limiting part 33, the first limiting part 33 and the second limiting part 53 can disperse the stress of the two side walls through surface contact, and the positive pressure on the two side walls is reduced, so that the reinforcing arm structure is protected; after the two parts are contacted, the spring arm 3 and the reinforcing arm 5 can stop rotating through the interaction between the first limiting part 33 and the second limiting part 53, and the spring arm 3 can be limited from continuously swinging downwards.
As shown in fig. 5, the reinforcing arm 5 may be a hollow structure (that is, the reinforcing arm 5 may be a hollow cylinder-like structure instead of a slot body), one side of the reinforcing arm 5 close to the elastic arm 3 forms a complete arc abutting plate, and the radian of the arc abutting plate can be matched with the elastic arm 3.
Alternatively, as shown in fig. 4, the reinforcing arm 5 may be a solid structure, and one side of the reinforcing arm 5 close to the spring arm 3 may be formed as an arc-shaped recess portion, and a surface of the recess portion may abut against the spring arm 3.
In another embodiment of the present application, as shown in fig. 6, the spring arm 3 is configured as a cylindrical structure, the portion of the reinforcing arm 5 contacting the spring arm 3 is a flat surface, and the flat surface is used for abutting against the spring arm 3 when the position is limited. In this embodiment, the plane serves as the second limiting portion 53, and after the first limiting portion 33 abuts against the second limiting portion 53, the spring arm 3 and the reinforcing arm 5 can stop rotating through the interaction between the first limiting portion 33 and the second limiting portion 53, so that the spring arm 3 can be limited from continuing to rotate downward.
In this embodiment, as shown in fig. 2 and 7, the spring arm 3 includes a first link 34 and a second link 35, a first end of the spring arm 3 is connected to the rotary base 2 through the first link 34, and a second end of the spring arm 3 is connected to the loading portion 4 through the second link 35. In the process of installing the spring arm 3, the spring arm 3 can be installed only by the first connecting rod 34 and the second connecting rod 35, and the installation is very convenient.
Specifically, as shown in fig. 2, one end of the first link 34 is fixedly connected to the spring arm 3, and the other end is hinged to the rotary base 2, so that the spring arm 3 can rotate around the rotary base 2; one end of the second connecting rod 35 is fixedly connected with the spring arm 3, and the other end is hinged with the loading part 4, so that the spring arm 3 and the loading part 4 can be rotationally connected, and when the spring arm 3 rotates, the loading part 4 can be guaranteed to move up and down. Further, as shown in fig. 7, the spring arm 3 includes a rod 36, a spring 37 is disposed in the rod 36, one end of the spring 37 is connected to the rod 36, and the other end of the spring 37 is connected to the rotary base 2, so that the spring 37 is always in a stretching state, and the spring 37 is always provided with a contracting force. The contraction force can be divided into two component forces in the vertical direction and the horizontal direction; when the loading part 4 is not used for hanging a heavy object, the vertical component of the contraction force of the spring 37 can cause the spring arm 3 to rotate upwards around the hinged position of the first link 34 and the rotating base 2 or have a tendency to rotate upwards; when the load part 4 hangs a heavy object, when the gravity of the heavy object is greater than the vertical component of the spring arm 3, the spring arm 3 rotates downward around the hinge position, and as the spring arm 3 rotates downward gradually, the contraction force of the spring arm 3 will be gradually increased, and the angle between the spring arm 3 and the vertical direction will be gradually increased, so that the vertical component of the contraction force of the spring 37 will be gradually increased, and until the vertical component is the same as the gravity of the heavy object, the spring arm 3 will not rotate, so that the mechanism is in a balanced state.
In practical use, the vertical component of the spring arm 3 is to balance the gravity of the weight suspended by the loading part 4, and the loading part 4 can be driven to move by applying a small force from the outside. The position of the loading part 4 is controlled by the force applied from the outside, and the loading part 4 moves in the working range under the action of the driving force in the working state. In the working process, if the spring 37 fails, the spring arm 3 will move downward until the first limiting portion 33 of the spring arm 3 abuts against the second limiting portion 53 of the reinforcing arm 5, and then the spring arm 3 and the reinforcing arm 5 can stop rotating by the mutual limitation between the first limiting portion 33 and the second limiting portion 53, so that the spring arm 3 can be limited to continue rotating downward. Therefore, when the spring 37 fails, the mechanical limiting mechanism can limit the object carrying part 4 through the interaction between the spring arm 3 and the reinforcing arm 5, and the object carrying part 4 and the heavy object are prevented from falling.
One end of the spring 37 is connected with the rotary base 2 through a first connecting piece, and the other end of the spring 37 is connected with the inner wall of the rod body 36 through a second connecting piece; one end of the first connecting piece is fixedly connected with the spring 37, and the other end of the first connecting piece is hinged with the rotating seat 2, so that the spring 37 can rotate around the rotating seat 2; second connecting piece one end and spring 37 fixed connection, the second connecting piece other end and the inner wall fixed connection of the body of rod 36 can guarantee that spring 37 one end is fixed, and when spring arm 3 rotated, spring 37 can rotate along with spring arm 3, and spring 37 can be stretched this moment.
Or, one end of the spring 37 is connected with the rotating base 2 through a first connecting piece, and the other end of the spring 37 is connected with the object carrying part 4 through a second connecting piece; one end of the first connecting piece is fixedly connected with the spring 37, and the other end of the first connecting piece is hinged with the rotating seat 2, so that the spring 37 can rotate around the rotating seat 2; one end of the second connecting piece is fixedly connected with the spring 37, and the other end of the second connecting piece is hinged with the loading part 4, so that the spring 37 can rotate around the loading part 4, when the spring arm 3 rotates, the spring 37 can rotate along with the spring arm 3, and at the moment, the spring 37 can be stretched.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A mechanical stop gear, its characterized in that includes:
a rotary base (2);
a spring arm (3), a first end of the spring arm (3) being connected with the rotary base (2);
the loading part (4) is used for loading objects, and the second end of the spring arm (3) is connected with the loading part (4);
the first end of the reinforcing arm (5) is connected with the rotating base (2), the second end of the reinforcing arm (5) is connected with the loading part (4), and the spring arm (3), the rotating base (2), the reinforcing arm (5) and the loading part (4) form a four-bar linkage;
the spring arm (3) and the reinforcing arm (5) are retained by contact between the spring arm (3) and the reinforcing arm (5), and the height of the retention is varied by adjusting the size of the spring arm (3) and/or the size of the reinforcing arm (5).
2. The mechanical spacing mechanism according to claim 1, characterized in that a first end of the spring arm (3) is connected to the rotary base (2) via a first rotation shaft (31), and a second end of the spring arm (3) is connected to the loading part (4) via a second rotation shaft (32);
the first end of the reinforcing arm (5) is connected with the rotating base (2) through a third rotating shaft (51), and the second end of the reinforcing arm (5) is connected with the loading part (4) through a fourth rotating shaft (52).
3. The mechanical spacing mechanism according to claim 2, wherein the distance L3 between the contact point of the reinforcing arm (5) with the spring arm (3) and the axial center of the fourth rotating shaft (52) and the radius R of the spring arm (3) is in the following relationship:
wherein, L1 is the axle center distance of the first rotating shaft (31) and the third rotating shaft (51), L4 is the axle center distance of the third rotating shaft (51) and the fourth rotating shaft (52), H is the gap formed between the part of the reinforcing arm (5) used for contacting the spring arm (3) and the outer wall of the spring arm (3), and H is the distance of the object carrying part (4) descending.
4. Mechanical spacing mechanism according to claim 1, characterized in that the spring arms (3) are arranged in a cylindrical configuration and the reinforcement arms (5) are arranged in a groove-like configuration, the opening of which is directed towards the spring arms (3); a supporting part (54) is arranged inside the groove-shaped structure, the supporting part (54) protrudes from the bottom of the groove-shaped structure along the height direction of the groove-shaped structure and extends along the length direction of the reinforcing arm (5), and the top of the supporting part (54) is used for being abutted against the spring arm (3).
5. The mechanical spacing mechanism according to claim 4, wherein along the length direction of the reinforcing arm (5), the groove-shaped structure of the reinforcing arm (5) comprises end plates arranged at both ends of the groove-shaped structure, and the end plates are connected with the side walls of the groove-shaped structure;
the side of the end plate facing the spring arm (3) is formed into a curved surface, and the curved surface is matched with the cross section shape of the spring arm (3).
6. Mechanical stop mechanism according to claim 1, wherein the spring arm (3) is configured as a cylindrical structure, the outer surface of the cylindrical structure is a cylindrical surface, the surface of the reinforcement arm (5) close to the spring arm (3) is an arc surface, the arc surface is at least partially adapted to the cylindrical surface, the arc surface is used for abutting against the spring arm (3), and the reinforcement arm (5) is configured as a hollow structure or a solid structure.
7. Mechanical stop mechanism according to claim 1, wherein the spring arm (3) is provided as a cylindrical structure, the face of the reinforcement arm (5) close to the spring arm (3) being a flat face for abutment with the spring arm (3).
8. Mechanical stop mechanism according to any of claims 1 to 7, wherein the spring arm (3) is in contact with the stiffening arm (5) by a first stop portion (33) thereof, the stiffening arm (5) being adapted to be in contact with the spring arm (3) by a second stop portion (53) thereof, the first stop portion (33) abutting the second stop portion (53) to stop the spring arm (3).
9. Mechanical stop mechanism according to claim 1, wherein the spring arm (3) comprises a rod (36), a spring (37) is arranged in the rod (36), one end of the spring (37) is connected to the rod (36), the other end is connected to the rotary base (2), and the spring (37) is always in tension.
10. The mechanical spacing mechanism according to claim 1, characterized in that the spring arm (3) comprises a first link (34) and a second link (35), one end of the first link (34) is fixedly connected with the spring arm (3), and the other end is hinged with the rotary base (2);
one end of the second connecting rod (35) is fixedly connected with the spring arm (3), and the other end of the second connecting rod is hinged with the loading part (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021199135.2U CN212643310U (en) | 2020-06-24 | 2020-06-24 | Mechanical limiting mechanism |
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| CN202021199135.2U CN212643310U (en) | 2020-06-24 | 2020-06-24 | Mechanical limiting mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021259359A1 (en) * | 2020-06-24 | 2021-12-30 | 上海安翰医疗技术有限公司 | Mechanical limiting mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021259359A1 (en) * | 2020-06-24 | 2021-12-30 | 上海安翰医疗技术有限公司 | Mechanical limiting mechanism |
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