CN115520742B

CN115520742B - Building

Info

Publication number: CN115520742B
Application number: CN202211328875.5A
Authority: CN
Inventors: 郑子芃; 张晨晖; 陈�峰; 张京辉; 张航; 王亚琪; 王奕杰; 何沐
Original assignee: China Urban Construction Design and Research Institute Co Ltd
Current assignee: China Urban Construction Design and Research Institute Co Ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-08-18
Anticipated expiration: 2042-10-27
Also published as: CN115520742A

Abstract

The invention provides a constant force device, connecting equipment and a building. The constant force device comprises a disc, a cam, a tension spring, a first pull wire and a second pull wire, wherein the disc and the cam are coaxially and fixedly connected together, the tension spring is connected to the periphery of the disc through the first pull wire, the second pull wire is connected to the periphery of the cam, the force application direction of the tension spring to the disc is opposite to the force application direction of the second pull wire to the cam, the outer profile of the cross section of the cam comprises a curve section, the second pull wire can be wound on the curve section in the rotating process of the cam, the distance between a point on the curve section and the rotation center of the cam is r2, the elasticity coefficient of the tension spring is k, the radius of the disc is r1, and the tension force applied by the second pull wire is F2, wherein r2=kr1×θ/f2×sin (θ1). According to the constant force device provided by the invention, a larger deformation range can be provided, and the requirement of the larger range of constant force deformation is met.

Description

Building

Technical Field

The invention relates to the technical field of safety of an additionally installed elevator, in particular to a constant force device, connecting equipment and a building.

Background

Masonry buildings such as old residential houses and offices are not matched with elevators at the beginning of design, and people can go upstairs and downstairs to get trouble. The update of the city brings a opportunity for the old district to be added with an elevator. At present, the national engineering of accelerating the promotion of the elevator installation of old communities is realized all over the country, and the work of elevator installation of the existing multi-layer masonry house of the old communities is promoted to the decision level of the government by the high importance of the national level.

If an elevator shaft is additionally arranged outside the multi-layer masonry house, if the connection is unreasonable, the local damage of the ring beam and the constructional column of the original structure of the house can be caused under the action of the pulling force of the connecting part when disasters such as earthquake and the like are encountered; secondly, uneven settlement of the elevator shaft can also cause local damage, and the damage can cause irreparable damage to the whole structure of the house, and collapse of the house can be caused when serious. Therefore, the impact isolation structure is added between the elevator and the house, so that adverse effects on the house caused by the elevator are avoided, and meanwhile, effective and stable connection between the elevator and the house can be ensured.

Aiming at the characteristic of impact isolation, the constant control force is the optimal control force of the impact damper, namely if the impact damper generates a constant control force, the acceleration of the isolated equipment is kept constant, and if the acceleration is slightly smaller than the maximum acceleration allowed to be born by the equipment, the relative displacement can be reduced to the maximum extent on the premise of equipment safety. Although this theory has been proposed for many years, it has rarely been applied to practical impact isolation devices.

The existing constant force device has a smaller deformation range, and cannot meet the deformation requirement caused by the relative displacement between the elevator and the building, so that the application of the constant force spring on the elevator is limited.

Disclosure of Invention

The invention aims to provide a constant force device, connecting equipment and a building, which can provide a larger deformation range and meet the requirement of constant force deformation in a larger range.

In order to solve the above technical problem, as one aspect of the present invention, a constant force device is provided, including a disc, a cam, a tension spring, a first pull wire and a second pull wire, where the disc and the cam are coaxially and fixedly connected together, the tension spring is connected to an outer periphery of the disc through the first pull wire, the second pull wire is connected to an outer periphery of the cam, a force application direction of the tension spring to the disc is opposite to a force application direction of the second pull wire to the cam, a cross-section outline of the cam includes a curve section, the second pull wire can be wound on the curve section during rotation of the cam, a distance between a point on the curve section and a rotation center of the cam is r2, an elastic coefficient of the tension spring is k, a radius of the disc is r1, a tension force applied by the second pull wire is F2, where r2=k×r1×θ/f2×sin (θ1), θ is a constant, θ is a connection angle between a force point on the cam and a center of the cam, and θ is an included angle between the first connection line and a force applied by the second pull wire.

Preferably, the outer peripheral wall of the disc is provided with an annular groove, the radius of the inner annular wall of the annular groove is the radius of the disc, and the first stay wire is arranged in the annular groove.

Preferably, the outer peripheral wall of the cam is provided with a guide groove, the projection of the inner annular wall of the guide groove on the disc forms a curve section, and the second stay wire is positioned in the guide groove.

Preferably, the outer peripheral wall of the cam is provided with a guide groove which extends spirally along the axial direction of the cam, the projection of the inner annular wall of the guide groove on the disc forms a curve section, and the angle of the curve section from the connection line of the starting point and the center of the cam to the connection line of the ending point and the center of the cam is larger than 360 degrees on the projection surface.

Preferably, the curved section is an archimedes spiral.

Preferably, the outer profile of the cross section of the cam further comprises a first circular arc section, a second circular arc section and a straight line section, and the first circular arc section, the curve section, the second circular arc section and the straight line section are connected end to end in sequence.

Preferably, the disc and the cam are detachably fixedly connected.

According to another aspect of the present invention, there is provided a connection apparatus including an apparatus main body and a constant force device provided on the apparatus main body, the constant force device being the above-described constant force device.

Preferably, the constant force device is rotatably mounted on the apparatus body, and one end of the tension spring is fixed on the apparatus body.

According to another aspect of the invention, there is provided a building comprising a multi-storey masonry house, a connecting device and an elevator additionally arranged, wherein the connecting device is the connecting device, the connecting device is fixed on the multi-storey masonry house, and the second stay wire is fixedly connected on the elevator additionally arranged.

The invention relates to a constant force device, which comprises a disc, a cam, a tension spring, a first pull wire and a second pull wire, wherein the disc and the cam are coaxially and fixedly connected together, the tension spring is connected to the periphery of the disc through the first pull wire, the second pull wire is connected to the periphery of the cam, the force application direction of the tension spring to the disc is opposite to the force application direction of the second pull wire to the cam, the cross section outline of the cam comprises a curve section, the second pull wire can be wound on the curve section in the rotation process of the cam, the distance between the point on the curve section and the rotation center of the cam is r2, the elasticity coefficient of the tension spring is k, the radius of the disc is r1, the tension force applied by the second pull wire is F2, wherein r2 = k r1 x theta/F2 sin (theta 1), r1 and F2 are constants, theta is the rotation angle of a turntable, the connection line between the acting point on the cam and the center of the cam is a first connection line, and the acting angle between the acting point of the second pull wire and the first connection line is formed by the acting angle between the acting point of the second pull wire and the first connection line. The constant force device is realized by adopting a mode that the disc is matched with the cam to draw the tension spring and the stay wire, and the radius of the cam is designed according to the radius of the disc by utilizing the principle of moment conservation, so that the radius of the cam can be related to the rotation angle of the disc and the rotation angle of the cam, the moment balance between the cam and the disc can be kept all the time in the whole rotation process, a constant force structure can be formed, the second stay wire stretching length of the scheme is related to the radius of the disc, the stretching length of the second stay wire is determined by the radius of the disc, and the proper radius of the disc can enable the second stay wire to stretch a larger length, so that a larger deformation range is provided, and the requirement of larger-range constant force deformation is met.

Drawings

FIG. 1 schematically illustrates a moment-balancing block diagram of a constant force device in a first state, in accordance with an embodiment of the present invention;

FIG. 2 schematically illustrates a torque balancing block diagram of a constant force device in a second state according to an embodiment of the present invention;

FIG. 3 schematically illustrates a torque balancing block diagram of a constant force device in a third state according to an embodiment of the present invention;

FIG. 4 schematically illustrates a side view of a constant force device of one embodiment of the invention;

FIG. 5 schematically illustrates a side view of a constant force device according to another embodiment of the invention;

fig. 6 schematically shows a schematic structural view of a connection device according to an embodiment of the present invention;

fig. 7 schematically illustrates a first connection state diagram of a multi-story masonry house and an add-on elevator according to an embodiment of the present invention;

fig. 8 schematically illustrates a second connection state diagram of a multi-story masonry house and an add-on elevator according to an embodiment of the present invention;

fig. 9 schematically illustrates a third connection state diagram of a multi-story masonry house and an add-on elevator according to an embodiment of the present invention;

reference numerals in the drawings: 1. a disc; 2. a cam; 3. a tension spring; 4. a first pull wire; 5. a second pull wire; 6. an annular groove; 7. a guide groove; 8. a first arc segment; 9. a second arc segment; 10. a straight line segment; 11. A curve segment; 12. an apparatus main body; 13. multi-storey masonry house; 14. and (5) additionally installing an elevator.

Detailed Description

The following describes embodiments of the invention in detail, but the invention may be practiced in a variety of different ways, as defined and covered by the claims.

Referring to fig. 1 to 9, according to an embodiment of the present invention, the constant force device includes a disc 1, a cam 2, a tension spring 3, a first pull wire 4 and a second pull wire 5, where the disc 1 and the cam 2 are coaxially and fixedly connected together, the tension spring 3 is connected to an outer periphery of the disc 1 through the first pull wire 4, the second pull wire 5 is connected to an outer periphery of the cam 2, a force application direction of the tension spring 3 to the disc 1 is opposite to a force application direction of the second pull wire 5 to the cam 2, a cross-section outline of the cam 2 includes a curve segment 11, the second pull wire 5 can be wound on the curve segment 11 during a rotation process of the cam 2, a distance between a point on the curve segment 11 and a rotation center of the cam 2 is r2, an elastic coefficient of the tension spring 3 is k, a radius of the disc 1 is r1, a tension force applied by the second pull wire 5 is F2, where r 2=k×r1×θ/f2×sin (θ 1), θ 1) is a constant, θ is a constant, and θ is a force between a line between the second pull wire and the first pull wire and the second pull wire is connected to the center of the cam 2.

For ease of description, r2 herein may be expressed as the radius of the cam 2, which is continuously variable.

The constant force device is realized by adopting the mode that the disc 1 and the cam 2 are matched with the tension spring 3 and the stay wire, the radius of the cam 2 is designed according to the radius of the disc 1 by utilizing the principle of moment conservation, so that the radius of the cam 2 can be related to the rotation angle of the disc 1 and the rotation angle of the cam 2, the moment balance between the cam 2 and the disc 1 can be kept all the time in the whole rotation process, a constant force structure can be formed, the stretching length of the second stay wire 5 in the scheme is related to the radius of the disc 1, the stretching length of the second stay wire 5 is determined by the radius of the disc 1, and the proper radius of the disc 1 can enable the second stay wire 5 to stretch for a larger length, so that a larger deformation range is provided, and the requirement of a larger-range constant force deformation is met.

In one embodiment, the outer circumferential wall of the disc 1 is provided with an annular groove 6, the radius of the inner circumferential wall of the annular groove 6 being the radius of the disc 1, and the first pull wire 4 is arranged in the annular groove 6.

In this embodiment, by arranging the annular groove 6 on the peripheral wall of the disc 1, the first stay wire 4 can be limited by using the side walls on two sides of the annular groove 6, so that the first stay wire 4 cannot slide out of the disc 1 when the periphery of the disc 1 rotates, the reliability and stability of the first stay wire 4 when running on the disc 1 are improved, and the reliability of the constant force device is improved.

The radius of the inner wall of the annular groove 6 is used as the radius of the disc 1, and when the cam 2 is designed using the radius of the disc 1, the radius of the disc 1 may be calculated using the radius of the inner wall of the annular groove 6 as the radius of the cam 2. In practice, when the disc 1 has the annular groove 6, the disc 1 has an outer diameter and an inner diameter, wherein the outer diameter is the maximum diameter of the disc 1, and the inner diameter is the radius of the inner wall of the annular groove 6 of the disc 1, and the calculated data is calculated when the radius of the cam 2 is calculated.

In some embodiments, the outer periphery of the disc 1 may be set to be a cylindrical surface, in this case, in order to place the offset of the first pull wire 4, limiting structures may be disposed at two ends of the disc 1 in the axial direction, so as to limit the movement of the first pull wire 4 on the outer periphery of the disc 1, and improve the reliability of the movement of the first pull wire 4.

In one embodiment, the outer peripheral wall of the cam 2 is provided with a guide groove 7, the projection of the inner annular wall of the guide groove 7 onto the disc 1 forming a curved section 11, the second wire 5 being located in the guide groove 7.

In the present embodiment, r2 is the groove bottom radius of the guide groove 7, not the outer contour dimension of the cam 2. By providing the guide groove 7 on the outer peripheral wall of the cam 2, the function similar to the annular groove 6 on the outer periphery of the disc 1, namely, the limiting function can be achieved, so that the second wire 5 can be stably attached to the inner wall surface of the guide groove 7 of the cam 2, and the operation reliability and stability of the second wire 5 are improved.

The cross sections of the annular groove 6 and the guide groove 7 are concave arc-shaped, and the first pull wire 4 and the second pull wire 5 have centering property and centering property, so that the first pull wire 4 and the second pull wire 5 always have a trend of moving towards the concave center in the operation process, the reliability of the movement positions of the first pull wire 4 and the second pull wire 5 in the grooves is further ensured, and the precision of the expansion or contraction of the first pull wire 4 and the second pull wire 5 is improved.

In one embodiment, the outer peripheral wall of the cam 2 is provided with a guide groove 7, the guide groove 7 extends spirally along the axial direction of the cam 2, and the projection of the inner annular wall of the guide groove 7 on the disc 1 forms a curve segment 11, and on the projection surface, the curve segment 11 rotates to an angle of more than 360 degrees from the line connecting the starting point and the center of the cam 2 to the line connecting the ending point and the center of the cam 2.

In practical applications, in the case where the structural dimensions of the disc 1 meet the requirements, in order to further increase the deployment length of the second wire 5, it is necessary to increase the outer circumferential contour length of the cam 2, whereas if the cam 2 is provided in a single-layer structure, the outer circumferential contour of the cam 2 is severely limited, and the increase in the length of the second wire 5 is limited, thus limiting the deformation range of the constant force device.

To overcome this problem, the cam 2 may be expanded in the axial direction so that the cam 2 is not limited to a single layer structure, so that the winding angle of the second wire 5 at the outer circumference of the cam 2 is not limited to 360 °, and thus, by adding the expansion structure in the axial direction of the cam 2, the cam 2 may have a larger profile circumference when being expanded, and thus the deformation range of the constant force device may be increased.

In one embodiment, the curve segment 11 is an archimedes spiral.

In one embodiment, the cross-section outer profile of the cam 2 further comprises a first arc section 8, a second arc section 9 and a straight line section 10, and the first arc section 8, the curve section 11, the second arc section 9 and the straight line section 10 are connected end to end in sequence.

In this embodiment, unlike the previous embodiment of the cam 2, the cam 2 in this embodiment has a single-layer structure, that is, the cam 2 does not extend in the axial direction, and has a single-layer cam structure.

In this embodiment, the cam 2 forms a closed loop structure through the first arc section 8, the curve section 11, the second arc section 9 and the straight line section 10 which are sequentially connected end to end, the matching between the second stay wire 5 and the cam 2 is mainly realized through the curve section 11, the first arc section 8 and the second arc section 9 are designed to realize the structure of the cam 2, the connection structure of the second stay wire 5 and the cam 2 is ensured to be easy to calculate when the starting point of expansion is increased, and meanwhile, the damage to the second stay wire 5 caused by the formation of the edge angle at the positions can be avoided.

In one embodiment, the disc 1 and the cam 2 are detachably and fixedly connected, so that on one hand, the assembly of the respective structures of the disc 1 and the cam 2 is more convenient, and on the other hand, the disassembly of the disc 1 and the cam 2 is convenient, and therefore, one of the two can be replaced at will when needed, the whole replacement is not needed, and the replacement and maintenance cost can be reduced.

When the disc 1 and the cam 2 are detachably connected, the disc 1 and the cam 2 can be circumferentially limited by utilizing the matching of the protrusions and the grooves at the disc surface, and then are fixedly connected through bolts.

Referring to fig. 6 in combination, according to an embodiment of the present invention, the connection apparatus includes an apparatus main body 12 and a constant force device provided on the apparatus main body 12, which is the constant force device described above.

In one embodiment, the constant force device is rotatably mounted on the apparatus body 12 to which one end of the tension spring 3 is fixed.

In this embodiment, the disc 1 and the cam 2 of the constant force device are both rotatably mounted on the apparatus main body 12, the tension spring 3 is also fixedly mounted on the apparatus main body 12, and the second wire 5 is connected to another apparatus requiring a constant tension provided by the connection apparatus.

In order to ensure the stress balance of the constant force device in the working process and improve the operation reliability and stability of the connecting device, in this embodiment, two constant force devices are disposed on the device main body 12, and the two constant force devices are mirror-symmetrical with respect to a middle plane of the device main body 12.

Referring to fig. 7 to 9 in combination, according to an embodiment of the present invention, the building includes a multi-story masonry house 13, a connection device, which is the connection device described above, and an elevator 14 attached thereto, the connection device being fixed to the multi-story masonry house 13, and the second wire 5 being fixedly connected to the elevator 14 attached thereto.

As shown in fig. 7, when no external force such as an earthquake is applied, the relative positions of the multi-story masonry house 13 and the attached elevator 14 are fixed and do not change, in which case the constant force device on the connecting apparatus does not provide a pulling force to the attached elevator 14 through the second pull wire 5 or only a preset pretension force, and the relative positions of the multi-story masonry house 13 and the attached elevator 14 are not changed, and the spacing at each position is kept uniform.

As shown in fig. 8 and 9, when an external force such as an earthquake is received, the relative positions of the multi-storey masonry house 13 and the elevator 14 are changed, so that the distance between the elevator 14 and the multi-storey masonry house 13 is different, and therefore, the stretching lengths of the second wires 5 of the constant force device are different at different positions, in this case, since the radius r2 of the cam 2 is designed such that the cam 2 satisfies the formula r2=kr1×r1×θ/f2×sin (θ1), the change of r2 is along with the change of r1, and the change is such that the pulling force between the elevator 14 and the multi-storey masonry house 13 is always kept constant, so that the deformation requirement caused by the relative displacement between the elevator and the building can be satisfied under the condition that the pulling force is constant.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The building comprises a multi-layer masonry house (13), connecting equipment and an elevator (14), and is characterized in that the connecting equipment comprises an equipment main body (12) and a constant force device arranged on the equipment main body (12), the constant force device comprises a disc (1), a cam (2), a tension spring (3), a first tension wire (4) and a second tension wire (5), the disc (1) and the cam (2) are coaxially and fixedly connected together, the tension spring (3) is connected to the periphery of the disc (1) through the first tension wire (4), the second tension wire (5) is connected to the periphery of the cam (2), the force application direction of the tension spring (3) to the disc (1) is opposite to the force application direction of the second tension wire (5) to the cam (2), the cross section outline of the cam (2) comprises a curve section (11), the second tension wire (5) can wind the curve section (11) in the rotating process of the cam (2), the tension spring (5) has a radius of elasticity r between the curve section (11) and the second tension wire (2) and the curve section (2) which has a radius of elasticity r, the tension coefficient r is equal to the radius r between the curve section (2), wherein r2=kr1×r1×θ/f2×sin (θ1), where r1 and F2 are constants, θ is a rotation angle of the turntable, a connection line between an acting point of the second pull wire (5) on the cam (2) and a center of the cam (2) is a first connection line, θ1 is an included angle between an acting direction of the second pull wire (5) and the first connection line, the connection device is fixed on the multi-layer masonry house (13), and the second pull wire (5) is fixedly connected on the elevator (14).

2. Building according to claim 1, characterized in that the outer circumferential wall of the disc (1) is provided with an annular groove (6), the inner circumferential wall radius of the annular groove (6) is the radius of the disc (1), and the first pull wire (4) is arranged in the annular groove (6).

3. Building according to claim 1, characterized in that the outer peripheral wall of the cam (2) is provided with a guide groove (7), the projection of the inner annular wall of the guide groove (7) on the disc (1) forming the curved section (11), the second stay wire (5) being located in the guide groove (7).

4. Building according to claim 1, characterized in that the outer circumferential wall of the cam (2) is provided with a guide groove (7), the guide groove (7) extends helically along the axial direction of the cam (2), the projection of the inner circumferential wall of the guide groove (7) on the disc (1) forms the curve section (11), and on the projection plane, the curve section (11) rotates from the line of the starting point and the center of the cam (2) to the line of the ending point and the center of the cam (2) by an angle of more than 360 °.

5. Building according to claim 1, characterized in that the cross-section outer profile of the cam (2) further comprises a first circular arc section (8), a second circular arc section (9) and a straight line section (10), wherein the first circular arc section (8), the curve section (11), the second circular arc section (9) and the straight line section (10) are connected end to end in sequence.

6. Building according to claim 1, characterized in that the disc (1) and the cam (2) are detachably fixedly connected.

7. Building according to claim 1, characterized in that the constant force device is rotatably mounted on the device body (12), one end of the tension spring (3) being fixed on the device body (12).