CN115520742A

CN115520742A - Constant force device, connecting equipment and building

Info

Publication number: CN115520742A
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: 2022-12-27
Anticipated expiration: 2042-10-27
Also published as: CN115520742B

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 rotating center of the cam is r2, the elastic coefficient of the tension spring is k, the radius of the disc is r1, and the tension applied by the second pull wire is F2, wherein r2= k r1 theta/F2 sin (theta 1). According to the constant force device, a larger deformation range can be provided, and the requirement of constant force deformation in a larger range is met.

Description

Constant force device, connecting equipment and building

Technical Field

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

Background

Brickwork buildings such as old residential quarters, offices and the like are generally not provided with elevators at the beginning of design, and certain crowds are puzzled by going upstairs and downstairs. The update of the city brings a chance for 'installing an elevator' in an old cell. At present, the promotion of old districts and the addition of elevators are accelerated all over the country, and the national level highly attaches importance to the fact that the work of adding elevators in existing multilayer masonry houses of old districts is promoted to the decision level of the government.

If the elevator shaft is additionally arranged outside a multi-layer masonry house, if the connection is unreasonable, local damage to the ring beam and the constructional column of the original structure of the house can be caused under the pulling force of the connecting part when disasters such as earthquake occur; secondly, uneven settlement of the elevator shaft also causes local damage, which causes irreparable damage to the overall structure of the house and, in severe cases, can lead to the collapse of the house. Consequently, this just need consider to increase between installing the elevator additional and the house and assault isolation structure, avoids installing the elevator additional and causes adverse effect to the house, can guarantee to install the effective stable connection between elevator and the house additional simultaneously.

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 borne by the equipment, the relative displacement can be reduced to the maximum extent on the premise of ensuring the safety of the equipment. Although this theory has been proposed for many years, it has rarely been applied to practical impact isolators.

The existing constant force device has a smaller deformation range, and cannot meet the deformation requirement caused by relative displacement between an additional elevator and a building, so that the application of a constant force spring on the additional 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 an aspect of the present invention, there is provided a constant force device, including 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 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-sectional outer profile of the cam includes a curved section, the second pull wire can be wound on the curved section during rotation of the cam, a distance between a point on the curved 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, wherein r2= k r1 θ/F2 sin (θ 1), wherein r1 and F2 are constants, θ is a rotation angle of the turntable, a line connecting a force point of the second pull wire on the cam and a center of the second pull wire is an included angle between the first pull wire and the first connection line.

Preferably, the outer circumferential wall of the disc is provided with an annular groove, the radius of the inner circumferential wall of the annular groove is the radius of the disc, and the first pull 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 curved section, and the second pull wire is positioned in the guide groove.

Preferably, the peripheral wall of the cam is provided with a guide groove, the guide groove extends spirally along the axial direction of the cam, the projection of the inner annular wall of the guide groove on the disk forms a curve section, and on the projection plane, the angle of the curve section from the connecting line of the starting point and the cam center to the connecting line of the terminal point and the cam center is larger than 360 degrees.

Preferably, the curved section is an archimedes spiral.

Preferably, the outer contour 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 sequentially connected end to end.

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

According to another aspect of the present invention, there is provided a connecting 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 to the apparatus body.

According to another aspect of the invention, a building is provided, which comprises a multi-storey masonry house, connecting equipment and an additional elevator, wherein the connecting equipment is the connecting equipment, the connecting equipment is fixed on the multi-storey masonry house, and a second stay wire is fixedly connected to the additional elevator.

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 cross section outer contour 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 a point on the curve section and the rotation center of the cam is r2, the elastic coefficient of the tension spring is k, the radius of the disc is r1, the tension applied by the second pull wire is F2, r2= k r1 theta/F2 sin (theta 1), r1 and F2 are constants, theta is the rotation angle of a rotary disc, the connecting line between the acting force point of the second pull wire on the cam and the center of the cam is a first connecting line, and theta 1 is the included angle between the acting force direction of the second pull wire and the first connecting line. This constant force device adopts disc and cam cooperation tension spring and the mode of acting as go-between to realize, utilize moment conservation principle, the radius of cam is designed according to the radius of disc, make the radius of cam can be correlated with the turned angle of disc and the turned angle of cam, thereby can guarantee that the cam can remain moment balance between whole rotation in-process and the disc all the time, thereby can form the constant force structure, because the second of this scheme is acted as go-between and is stretched out length and disc's radius relevant, consequently the radius of disc has decided the flexible length that the second acted as go-between, suitable disc radius can make the second act as go-between tensile great length, thereby provide great deformation range, satisfy the more wide range constant force demand of deforming.

Drawings

FIG. 1 is a schematic diagram of a moment balance configuration of a constant force apparatus in a first state according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating a moment balance configuration of a constant force apparatus in a second state according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a torque balance configuration of a constant force apparatus according to an embodiment of the present invention in a third state;

FIG. 4 schematically illustrates a side view block diagram of a constant force apparatus of one embodiment of the present invention;

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

fig. 6 schematically shows a schematic configuration of a connection device of an embodiment of the present invention;

fig. 7 schematically shows a first connection state diagram of a multistorey masonry house and an additional elevator according to an embodiment of the present invention;

fig. 8 schematically shows a second connection state diagram of the multi-storey masonry house and the additional elevator of the embodiment of the invention;

fig. 9 schematically shows a third connection state diagram of a multi-storey masonry house and an elevator installation according to an embodiment of the invention;

reference numbers in the figures: 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. a multi-storey masonry building; 14. and (5) additionally installing an elevator.

Detailed Description

The following detailed description of embodiments of the invention, but the invention can be practiced in many 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 apparatus includes a disc 1, a cam 2, a tension spring 3, a first pull wire 4 and a second pull wire 5, 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 direction of the tension spring 3 applying a force to the disc 1 is opposite to a direction of the second pull wire 5 applying a force to the cam 2, a cross-sectional outer profile of the cam 2 includes a curved section 11, the second pull wire 5 can be wound on the curved section 11 during rotation of the cam 2, a distance between a point on the curved section 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 applied by the second pull wire 5 is F2, wherein r2= k r1 θ/F2 (θ 1), where r1 and F2 are constants, an included angle between the rotation angle of the rotation center of the disc 1 and an angle of the second pull wire 2 is an angle between the second pull wire 2, and an angle between the second pull wire of the cam 2 is an angle of the connection line.

For convenience of description, r2 herein may be expressed as a radius of the cam 2, which is continuously varied.

This constant force device adopts

disc

1 and 2 cooperation tension spring 3 of cam and the mode of acting as go-between to realize, utilize moment conservation principle, design cam 2's radius according to disc 1's radius, make cam 2's radius can be associated with disc 1's turned angle and cam 2's turned angle, thereby can guarantee cam 2 can be all the time with disc 1 between the moment balance at whole rotation in-process, thereby can form the constant force structure, because the second of this scheme acts as go-between 5 stretches out length and disc 1's radius is relevant, consequently disc 1's radius has decided the flexible length of second acting as go-between 5, suitable disc 1 radius can make the second act as go-between 5 tensile great length, thereby provide great deformation range, satisfy the demand of wider range constant force deformation.

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

In this embodiment, through set up ring channel 6 at the periphery wall of disc 1, can utilize the both sides lateral wall of ring channel 6 to carry on spacingly to first acting as go-between 4 for first acting as go-between 4 can not the roll-off disc 1 outside when the periphery of disc 1 rotates, improves reliability and stability when first acting as go-between 4 moves on disc 1, improves the reliability of constant force device.

Here, the term "radius of the inner circumferential wall of the annular groove 6" as the radius of the disc 1 means that when the cam 2 is designed using the radius of the disc 1, the radius of the inner circumferential wall of the annular groove 6 can be taken as the radius of the disc 1 when the radius of the cam 2 is calculated, and in practice, when the disc 1 has the annular groove 6, the disc 1 has an outer diameter and an inner diameter, the outer diameter being the maximum diameter of the disc 1, and the inner diameter being the radius of the inner circumferential wall of the annular groove 6 of the disc 1 as the calculation data when the radius of the cam 2 is calculated.

In some embodiments, the outer periphery of the disc 1 may also be set as a cylindrical surface, in this case, in order to prevent the offset of the first pull wire 4, a limiting structure may be disposed at both 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, thereby improving 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 on the disc 1 forms a curved section 11, and the second wire 5 is positioned in the guide groove 7.

In the present embodiment, r2 is the radius of the groove bottom of the guide groove 7, not the outer contour dimension of the cam 2. Through set up guide way 7 at the periphery wall of cam 2, also can play the similar effect of ring channel 6 with disc 1 periphery, also be the limiting displacement for second acting as go-between 5 can laminate on the internal face of guide way 7 of cam 2 steadily, improves the operational reliability and the stability of second acting as go-between 5.

The cross sections of the annular groove 6 and the guide groove 7 are concave arc-shaped, and can have centricity and centricity, so that the first pull wire 4 and the second pull wire 5 always have a tendency of moving towards the concave center in the operation process, the reliability of the moving positions of the first pull wire 4 and the second pull wire 5 in the grooves is further ensured, and the expanding or contracting precision 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, the projection of the inner annular wall of the guide groove 7 on the disc 1 forms a curved section 11, and the angle of the curved section 11 rotating from the connecting line of the starting point and the center of the cam 2 to the connecting line of the ending point and the center of the cam 2 on the projection plane is larger than 360 degrees.

In practical applications, in the case that the structural size of the disc 1 meets the requirement, in order to further increase the development length of the second pull wire 5, the length of the outer peripheral contour of the cam 2 needs to be increased, and if the cam 2 is provided as a single-layer structure, the outer peripheral contour of the cam 2 is more severely limited, and the length increase of the second pull wire 5 is limited, thereby limiting the deformation range of the constant force device.

In order 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 on the outer periphery 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 contour circumference when being unfolded, and thus, the deformation range of the constant force device may be increased.

In one embodiment, the curved section 11 is an archimedes spiral.

In one embodiment, the cross-sectional outer profile of the cam 2 further includes a first circular arc section 8, a second circular arc section 9 and a straight line section 10, and the first circular arc section 8, the curved line section 11, the second circular arc section 9 and the straight line section 10 are sequentially connected end to end.

In this embodiment, different from the previous embodiment of the cam 2, the cam 2 in this embodiment is a single-layer structure, that is, the cam 2 does not expand in the axial direction, and is a single-layer cam structure, and in this structure, the structural design of the cam 2 is simpler, the size calculation is simple, the design cost is lower, the processing cost is lower, and the implementation is easy.

In this embodiment, the cam 2 forms a closed loop structure through the first circular arc section 8, the curve section 11, the second circular arc section 9 and the straight line section 10 that connect gradually end to end, the matching of the second guy wire 5 and the cam 2 is mainly realized through the curve section 11, the first circular arc section 8 and the second circular arc section 9 are structural designs for realizing the cam 2, and it is ensured that the second guy wire 5 and the connecting structure of the cam 2 are increased at the expansion starting point and are easy to calculate, and simultaneously, it can also be avoided that the second guy wire 5 is damaged by forming edges and corners at these positions.

In one embodiment, the disc 1 and the cam 2 are detachably and fixedly connected, so that on one hand, the respective structures of the disc 1 and the cam 2 can be assembled more conveniently, and on the other hand, the disc 1 and the cam 2 can be disassembled conveniently, so that one of the disc 1 and the cam 2 can be replaced at will when needed, the whole disc 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 surface and the cam 2 can be circumferentially limited by the aid of the protrusions and the grooves in a matched mode, and then the disc surface and the cam are fixedly connected through bolts.

Referring collectively to fig. 6, according to an embodiment of the present invention, the connecting apparatus includes an apparatus body 12 and a constant force device provided on the apparatus body 12, the constant force device being the above-described constant force device.

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

In the embodiment, the disc 1 and the cam 2 of the constant force device are both rotatably mounted on the device body 12, the tension spring 3 is also fixedly mounted on the device body 12, and the second pull wire 5 is connected to another device which needs to be connected to provide constant tension.

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

Referring to fig. 7 to 9 in combination, according to the embodiment of the invention, the building comprises a plurality of layers of masonry houses 13, connecting equipment and an additional elevator 14, wherein the connecting equipment is the connecting equipment, the connecting equipment is fixed on the plurality of layers of masonry houses 13, and the second stay wires 5 are fixedly connected to the additional elevator 14.

As shown in fig. 7, when the external force such as earthquake is not applied, the relative positions of the multi-storey masonry house 13 and the added elevator 14 are fixed and do not change, in this case, the constant force device on the connecting device does not provide pulling force for the added elevator 14 through the second pull wire 5 or only provides preset pre-pulling force, the relative positions of the multi-storey masonry house 13 and the added elevator 14 do not change, and the distance between the positions is kept consistent.

As shown in fig. 8 and 9, when external force such as an earthquake is received, the relative positions of the multi-layer masonry house 13 and the additional elevator 14 are changed, so that the distances between the additional elevator 14 and the multi-layer masonry house 13 at different positions are different, and therefore, the stretching lengths of the second stay wires 5 of the constant force device at different positions are different, in this case, due to the design of the cam 2, the radius r2 of the cam 2 meets the formula r2= k r1 θ/F2 sin (θ 1), so that the change of r2 is changed along with the change of r1, and the change enables F2 to be kept constant all the time, namely, the tension between the additional elevator 14 and the multi-layer masonry house 13 at different positions is constant, so that the deformation requirement caused by the relative displacement between the additional elevator and the building can be met under the condition of constant tension.

In the description of the present invention, it is to 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 those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The constant force device is characterized by comprising a disc (1), a cam (2), a tension spring (3), a first pull wire (4) and a second pull wire (5), wherein 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 pull wire (4), the second pull 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 pull wire (5) to the cam (2), and the cross section outline of the cam (2) comprises a curve section (11), the second pull wire (5) can be wound on the curve section (11) in the process of rotating the cam (2), the distance between a point on the curve section (11) and the rotating center of the cam (2) is r2, the elastic coefficient of the tension spring (3) is k, the radius of the disc (1) is r1, the tension applied by the second pull wire (5) is F2, wherein r2= k r1 theta/F2 sin (theta 1), r1 and F2 are constants, theta is the rotating angle of the rotating disc, and the connecting line of the acting force point of the second pull wire (5) on the cam (2) and the center of the cam (2) is a first connecting line, theta 1 is an included angle between the acting force direction of the second pull wire (5) and the first connecting wire.

2. The constant force device according to claim 1, wherein 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. The constant-force device 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) forms the curved section (11), and the second pull wire (5) is located in the guide groove (7).

4. The constant force device according to claim 1, wherein 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), the projection of the inner peripheral wall of the guide groove (7) on the disk (1) forms the curve section (11), and the angle of the curve section (11) from the connecting line of the starting point and the center of the cam (2) to the connecting line of the ending point and the center of the cam (2) on the projection plane is larger than 360 degrees.

5. A constant force device according to claim 3 or 4, characterized in that the curved section (11) is an Archimedes spiral.

6. The constant force device according to claim 1, wherein the cross-sectional outer contour of the cam (2) further comprises a first circular arc section (8), a second circular arc section (9) and a straight line section (10), and the first circular arc section (8), the curved line section (11), the second circular arc section (9) and the straight line section (10) are sequentially connected end to end.

7. The constant force device according to claim 1, characterized in that the disc (1) and the cam (2) are detachably fixedly connected.

8. A connecting device comprising a device body (12) and a constant force apparatus provided on the device body (12), characterized in that the constant force apparatus is the constant force apparatus according to any one of claims 1 to 7.

9. A connecting device according to claim 8, characterised in that the constant force means are rotatably mounted on the device body (12), one end of the tension spring (3) being fixed to the device body (12).

10. A building comprising a multi-storey masonry house (13), connecting equipment and an add-on elevator (14), characterized in that the connecting equipment is according to claim 8 or 9, the connecting equipment is fixed to the multi-storey masonry house (13), and the second guy wires (5) are fixedly connected to the add-on elevator (14).